| /* |
| * various utility functions for use within FFmpeg |
| * Copyright (c) 2000, 2001, 2002 Fabrice Bellard |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #include "avformat.h" |
| #include "internal.h" |
| #include "libavcodec/opt.h" |
| #include "metadata.h" |
| #include "libavutil/avstring.h" |
| #include "riff.h" |
| #include <sys/time.h> |
| #include <time.h> |
| #include <strings.h> |
| |
| #undef NDEBUG |
| #include <assert.h> |
| |
| /** |
| * @file libavformat/utils.c |
| * various utility functions for use within FFmpeg |
| */ |
| |
| unsigned avformat_version(void) |
| { |
| return LIBAVFORMAT_VERSION_INT; |
| } |
| |
| /* fraction handling */ |
| |
| /** |
| * f = val + (num / den) + 0.5. |
| * |
| * 'num' is normalized so that it is such as 0 <= num < den. |
| * |
| * @param f fractional number |
| * @param val integer value |
| * @param num must be >= 0 |
| * @param den must be >= 1 |
| */ |
| static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den) |
| { |
| num += (den >> 1); |
| if (num >= den) { |
| val += num / den; |
| num = num % den; |
| } |
| f->val = val; |
| f->num = num; |
| f->den = den; |
| } |
| |
| /** |
| * Fractional addition to f: f = f + (incr / f->den). |
| * |
| * @param f fractional number |
| * @param incr increment, can be positive or negative |
| */ |
| static void av_frac_add(AVFrac *f, int64_t incr) |
| { |
| int64_t num, den; |
| |
| num = f->num + incr; |
| den = f->den; |
| if (num < 0) { |
| f->val += num / den; |
| num = num % den; |
| if (num < 0) { |
| num += den; |
| f->val--; |
| } |
| } else if (num >= den) { |
| f->val += num / den; |
| num = num % den; |
| } |
| f->num = num; |
| } |
| |
| /** head of registered input format linked list */ |
| AVInputFormat *first_iformat = NULL; |
| /** head of registered output format linked list */ |
| AVOutputFormat *first_oformat = NULL; |
| |
| AVInputFormat *av_iformat_next(AVInputFormat *f) |
| { |
| if(f) return f->next; |
| else return first_iformat; |
| } |
| |
| AVOutputFormat *av_oformat_next(AVOutputFormat *f) |
| { |
| if(f) return f->next; |
| else return first_oformat; |
| } |
| |
| void av_register_input_format(AVInputFormat *format) |
| { |
| AVInputFormat **p; |
| p = &first_iformat; |
| while (*p != NULL) p = &(*p)->next; |
| *p = format; |
| format->next = NULL; |
| } |
| |
| void av_register_output_format(AVOutputFormat *format) |
| { |
| AVOutputFormat **p; |
| p = &first_oformat; |
| while (*p != NULL) p = &(*p)->next; |
| *p = format; |
| format->next = NULL; |
| } |
| |
| int match_ext(const char *filename, const char *extensions) |
| { |
| const char *ext, *p; |
| char ext1[32], *q; |
| |
| if(!filename) |
| return 0; |
| |
| ext = strrchr(filename, '.'); |
| if (ext) { |
| ext++; |
| p = extensions; |
| for(;;) { |
| q = ext1; |
| while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1) |
| *q++ = *p++; |
| *q = '\0'; |
| if (!strcasecmp(ext1, ext)) |
| return 1; |
| if (*p == '\0') |
| break; |
| p++; |
| } |
| } |
| return 0; |
| } |
| |
| static int match_format(const char *name, const char *names) |
| { |
| const char *p; |
| int len, namelen; |
| |
| if (!name || !names) |
| return 0; |
| |
| namelen = strlen(name); |
| while ((p = strchr(names, ','))) { |
| len = FFMAX(p - names, namelen); |
| if (!strncasecmp(name, names, len)) |
| return 1; |
| names = p+1; |
| } |
| return !strcasecmp(name, names); |
| } |
| |
| AVOutputFormat *guess_format(const char *short_name, const char *filename, |
| const char *mime_type) |
| { |
| AVOutputFormat *fmt, *fmt_found; |
| int score_max, score; |
| |
| /* specific test for image sequences */ |
| #if CONFIG_IMAGE2_MUXER |
| if (!short_name && filename && |
| av_filename_number_test(filename) && |
| av_guess_image2_codec(filename) != CODEC_ID_NONE) { |
| return guess_format("image2", NULL, NULL); |
| } |
| #endif |
| /* Find the proper file type. */ |
| fmt_found = NULL; |
| score_max = 0; |
| fmt = first_oformat; |
| while (fmt != NULL) { |
| score = 0; |
| if (fmt->name && short_name && !strcmp(fmt->name, short_name)) |
| score += 100; |
| if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type)) |
| score += 10; |
| if (filename && fmt->extensions && |
| match_ext(filename, fmt->extensions)) { |
| score += 5; |
| } |
| if (score > score_max) { |
| score_max = score; |
| fmt_found = fmt; |
| } |
| fmt = fmt->next; |
| } |
| return fmt_found; |
| } |
| |
| AVOutputFormat *guess_stream_format(const char *short_name, const char *filename, |
| const char *mime_type) |
| { |
| AVOutputFormat *fmt = guess_format(short_name, filename, mime_type); |
| |
| if (fmt) { |
| AVOutputFormat *stream_fmt; |
| char stream_format_name[64]; |
| |
| snprintf(stream_format_name, sizeof(stream_format_name), "%s_stream", fmt->name); |
| stream_fmt = guess_format(stream_format_name, NULL, NULL); |
| |
| if (stream_fmt) |
| fmt = stream_fmt; |
| } |
| |
| return fmt; |
| } |
| |
| enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name, |
| const char *filename, const char *mime_type, enum CodecType type){ |
| if(type == CODEC_TYPE_VIDEO){ |
| enum CodecID codec_id= CODEC_ID_NONE; |
| |
| #if CONFIG_IMAGE2_MUXER |
| if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){ |
| codec_id= av_guess_image2_codec(filename); |
| } |
| #endif |
| if(codec_id == CODEC_ID_NONE) |
| codec_id= fmt->video_codec; |
| return codec_id; |
| }else if(type == CODEC_TYPE_AUDIO) |
| return fmt->audio_codec; |
| else |
| return CODEC_ID_NONE; |
| } |
| |
| AVInputFormat *av_find_input_format(const char *short_name) |
| { |
| AVInputFormat *fmt; |
| for(fmt = first_iformat; fmt != NULL; fmt = fmt->next) { |
| if (match_format(short_name, fmt->name)) |
| return fmt; |
| } |
| return NULL; |
| } |
| |
| /* memory handling */ |
| |
| void av_destruct_packet(AVPacket *pkt) |
| { |
| av_free(pkt->data); |
| pkt->data = NULL; pkt->size = 0; |
| } |
| |
| void av_init_packet(AVPacket *pkt) |
| { |
| pkt->pts = AV_NOPTS_VALUE; |
| pkt->dts = AV_NOPTS_VALUE; |
| pkt->pos = -1; |
| pkt->duration = 0; |
| pkt->convergence_duration = 0; |
| pkt->flags = 0; |
| pkt->stream_index = 0; |
| pkt->destruct= av_destruct_packet_nofree; |
| } |
| |
| int av_new_packet(AVPacket *pkt, int size) |
| { |
| uint8_t *data; |
| if((unsigned)size > (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE) |
| return AVERROR(ENOMEM); |
| data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); |
| if (!data) |
| return AVERROR(ENOMEM); |
| memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
| |
| av_init_packet(pkt); |
| pkt->data = data; |
| pkt->size = size; |
| pkt->destruct = av_destruct_packet; |
| return 0; |
| } |
| |
| int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size) |
| { |
| int ret= av_new_packet(pkt, size); |
| |
| if(ret<0) |
| return ret; |
| |
| pkt->pos= url_ftell(s); |
| |
| ret= get_buffer(s, pkt->data, size); |
| if(ret<=0) |
| av_free_packet(pkt); |
| else |
| pkt->size= ret; |
| |
| return ret; |
| } |
| |
| int av_dup_packet(AVPacket *pkt) |
| { |
| if (((pkt->destruct == av_destruct_packet_nofree) || (pkt->destruct == NULL)) && pkt->data) { |
| uint8_t *data; |
| /* We duplicate the packet and don't forget to add the padding again. */ |
| if((unsigned)pkt->size > (unsigned)pkt->size + FF_INPUT_BUFFER_PADDING_SIZE) |
| return AVERROR(ENOMEM); |
| data = av_malloc(pkt->size + FF_INPUT_BUFFER_PADDING_SIZE); |
| if (!data) { |
| return AVERROR(ENOMEM); |
| } |
| memcpy(data, pkt->data, pkt->size); |
| memset(data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
| pkt->data = data; |
| pkt->destruct = av_destruct_packet; |
| } |
| return 0; |
| } |
| |
| int av_filename_number_test(const char *filename) |
| { |
| char buf[1024]; |
| return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0); |
| } |
| |
| static AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max) |
| { |
| AVInputFormat *fmt1, *fmt; |
| int score; |
| |
| fmt = NULL; |
| for(fmt1 = first_iformat; fmt1 != NULL; fmt1 = fmt1->next) { |
| if (!is_opened == !(fmt1->flags & AVFMT_NOFILE)) |
| continue; |
| score = 0; |
| if (fmt1->read_probe) { |
| score = fmt1->read_probe(pd); |
| } else if (fmt1->extensions) { |
| if (match_ext(pd->filename, fmt1->extensions)) { |
| score = 50; |
| } |
| } |
| if (score > *score_max) { |
| *score_max = score; |
| fmt = fmt1; |
| }else if (score == *score_max) |
| fmt = NULL; |
| } |
| return fmt; |
| } |
| |
| AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){ |
| int score=0; |
| return av_probe_input_format2(pd, is_opened, &score); |
| } |
| |
| static int set_codec_from_probe_data(AVStream *st, AVProbeData *pd, int score) |
| { |
| AVInputFormat *fmt; |
| fmt = av_probe_input_format2(pd, 1, &score); |
| |
| if (fmt) { |
| if (!strcmp(fmt->name, "mp3")) { |
| st->codec->codec_id = CODEC_ID_MP3; |
| st->codec->codec_type = CODEC_TYPE_AUDIO; |
| } else if (!strcmp(fmt->name, "ac3")) { |
| st->codec->codec_id = CODEC_ID_AC3; |
| st->codec->codec_type = CODEC_TYPE_AUDIO; |
| } else if (!strcmp(fmt->name, "mpegvideo")) { |
| st->codec->codec_id = CODEC_ID_MPEG2VIDEO; |
| st->codec->codec_type = CODEC_TYPE_VIDEO; |
| } else if (!strcmp(fmt->name, "m4v")) { |
| st->codec->codec_id = CODEC_ID_MPEG4; |
| st->codec->codec_type = CODEC_TYPE_VIDEO; |
| } else if (!strcmp(fmt->name, "h264")) { |
| st->codec->codec_id = CODEC_ID_H264; |
| st->codec->codec_type = CODEC_TYPE_VIDEO; |
| } |
| } |
| return !!fmt; |
| } |
| |
| /************************************************************/ |
| /* input media file */ |
| |
| /** |
| * Open a media file from an IO stream. 'fmt' must be specified. |
| */ |
| int av_open_input_stream(AVFormatContext **ic_ptr, |
| ByteIOContext *pb, const char *filename, |
| AVInputFormat *fmt, AVFormatParameters *ap) |
| { |
| int err; |
| AVFormatContext *ic; |
| AVFormatParameters default_ap; |
| |
| if(!ap){ |
| ap=&default_ap; |
| memset(ap, 0, sizeof(default_ap)); |
| } |
| |
| if(!ap->prealloced_context) |
| ic = avformat_alloc_context(); |
| else |
| ic = *ic_ptr; |
| if (!ic) { |
| err = AVERROR(ENOMEM); |
| goto fail; |
| } |
| ic->iformat = fmt; |
| ic->pb = pb; |
| ic->duration = AV_NOPTS_VALUE; |
| ic->start_time = AV_NOPTS_VALUE; |
| av_strlcpy(ic->filename, filename, sizeof(ic->filename)); |
| |
| /* allocate private data */ |
| if (fmt->priv_data_size > 0) { |
| ic->priv_data = av_mallocz(fmt->priv_data_size); |
| if (!ic->priv_data) { |
| err = AVERROR(ENOMEM); |
| goto fail; |
| } |
| } else { |
| ic->priv_data = NULL; |
| } |
| |
| if (ic->iformat->read_header) { |
| err = ic->iformat->read_header(ic, ap); |
| if (err < 0) |
| goto fail; |
| } |
| |
| if (pb && !ic->data_offset) |
| ic->data_offset = url_ftell(ic->pb); |
| |
| #if LIBAVFORMAT_VERSION_MAJOR < 53 |
| ff_metadata_demux_compat(ic); |
| #endif |
| |
| *ic_ptr = ic; |
| return 0; |
| fail: |
| if (ic) { |
| int i; |
| av_freep(&ic->priv_data); |
| for(i=0;i<ic->nb_streams;i++) { |
| AVStream *st = ic->streams[i]; |
| if (st) { |
| av_free(st->priv_data); |
| av_free(st->codec->extradata); |
| } |
| av_free(st); |
| } |
| } |
| av_free(ic); |
| *ic_ptr = NULL; |
| return err; |
| } |
| |
| /** size of probe buffer, for guessing file type from file contents */ |
| #define PROBE_BUF_MIN 2048 |
| #define PROBE_BUF_MAX (1<<20) |
| |
| int av_open_input_file(AVFormatContext **ic_ptr, const char *filename, |
| AVInputFormat *fmt, |
| int buf_size, |
| AVFormatParameters *ap) |
| { |
| int err, probe_size; |
| AVProbeData probe_data, *pd = &probe_data; |
| ByteIOContext *pb = NULL; |
| |
| pd->filename = ""; |
| if (filename) |
| pd->filename = filename; |
| pd->buf = NULL; |
| pd->buf_size = 0; |
| |
| if (!fmt) { |
| /* guess format if no file can be opened */ |
| fmt = av_probe_input_format(pd, 0); |
| } |
| |
| /* Do not open file if the format does not need it. XXX: specific |
| hack needed to handle RTSP/TCP */ |
| if (!fmt || !(fmt->flags & AVFMT_NOFILE)) { |
| /* if no file needed do not try to open one */ |
| if ((err=url_fopen(&pb, filename, URL_RDONLY)) < 0) { |
| goto fail; |
| } |
| if (buf_size > 0) { |
| url_setbufsize(pb, buf_size); |
| } |
| |
| for(probe_size= PROBE_BUF_MIN; probe_size<=PROBE_BUF_MAX && !fmt; probe_size<<=1){ |
| int score= probe_size < PROBE_BUF_MAX ? AVPROBE_SCORE_MAX/4 : 0; |
| /* read probe data */ |
| pd->buf= av_realloc(pd->buf, probe_size + AVPROBE_PADDING_SIZE); |
| pd->buf_size = get_buffer(pb, pd->buf, probe_size); |
| memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE); |
| if (url_fseek(pb, 0, SEEK_SET) < 0) { |
| url_fclose(pb); |
| if (url_fopen(&pb, filename, URL_RDONLY) < 0) { |
| pb = NULL; |
| err = AVERROR(EIO); |
| goto fail; |
| } |
| } |
| /* guess file format */ |
| fmt = av_probe_input_format2(pd, 1, &score); |
| } |
| av_freep(&pd->buf); |
| } |
| |
| /* if still no format found, error */ |
| if (!fmt) { |
| err = AVERROR_NOFMT; |
| goto fail; |
| } |
| |
| /* check filename in case an image number is expected */ |
| if (fmt->flags & AVFMT_NEEDNUMBER) { |
| if (!av_filename_number_test(filename)) { |
| err = AVERROR_NUMEXPECTED; |
| goto fail; |
| } |
| } |
| err = av_open_input_stream(ic_ptr, pb, filename, fmt, ap); |
| if (err) |
| goto fail; |
| return 0; |
| fail: |
| av_freep(&pd->buf); |
| if (pb) |
| url_fclose(pb); |
| *ic_ptr = NULL; |
| return err; |
| |
| } |
| |
| /*******************************************************/ |
| |
| static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt, |
| AVPacketList **plast_pktl){ |
| AVPacketList *pktl = av_mallocz(sizeof(AVPacketList)); |
| if (!pktl) |
| return NULL; |
| |
| if (*packet_buffer) |
| (*plast_pktl)->next = pktl; |
| else |
| *packet_buffer = pktl; |
| |
| /* add the packet in the buffered packet list */ |
| *plast_pktl = pktl; |
| pktl->pkt= *pkt; |
| return &pktl->pkt; |
| } |
| |
| int av_read_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| int ret; |
| AVStream *st; |
| |
| for(;;){ |
| AVPacketList *pktl = s->raw_packet_buffer; |
| |
| if (pktl) { |
| *pkt = pktl->pkt; |
| if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE){ |
| s->raw_packet_buffer = pktl->next; |
| av_free(pktl); |
| return 0; |
| } |
| } |
| |
| av_init_packet(pkt); |
| ret= s->iformat->read_packet(s, pkt); |
| if (ret < 0) |
| return ret; |
| st= s->streams[pkt->stream_index]; |
| |
| switch(st->codec->codec_type){ |
| case CODEC_TYPE_VIDEO: |
| if(s->video_codec_id) st->codec->codec_id= s->video_codec_id; |
| break; |
| case CODEC_TYPE_AUDIO: |
| if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id; |
| break; |
| case CODEC_TYPE_SUBTITLE: |
| if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id; |
| break; |
| } |
| |
| if(!pktl && st->codec->codec_id!=CODEC_ID_PROBE) |
| return ret; |
| |
| add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end); |
| |
| if(st->codec->codec_id == CODEC_ID_PROBE){ |
| AVProbeData *pd = &st->probe_data; |
| |
| pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE); |
| memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size); |
| pd->buf_size += pkt->size; |
| memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE); |
| |
| if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){ |
| set_codec_from_probe_data(st, pd, 1); |
| if(st->codec->codec_id != CODEC_ID_PROBE){ |
| pd->buf_size=0; |
| av_freep(&pd->buf); |
| } |
| } |
| } |
| } |
| } |
| |
| /**********************************************************/ |
| |
| /** |
| * Get the number of samples of an audio frame. Return -1 on error. |
| */ |
| static int get_audio_frame_size(AVCodecContext *enc, int size) |
| { |
| int frame_size; |
| |
| if(enc->codec_id == CODEC_ID_VORBIS) |
| return -1; |
| |
| if (enc->frame_size <= 1) { |
| int bits_per_sample = av_get_bits_per_sample(enc->codec_id); |
| |
| if (bits_per_sample) { |
| if (enc->channels == 0) |
| return -1; |
| frame_size = (size << 3) / (bits_per_sample * enc->channels); |
| } else { |
| /* used for example by ADPCM codecs */ |
| if (enc->bit_rate == 0) |
| return -1; |
| frame_size = (size * 8 * enc->sample_rate) / enc->bit_rate; |
| } |
| } else { |
| frame_size = enc->frame_size; |
| } |
| return frame_size; |
| } |
| |
| |
| /** |
| * Return the frame duration in seconds. Return 0 if not available. |
| */ |
| static void compute_frame_duration(int *pnum, int *pden, AVStream *st, |
| AVCodecParserContext *pc, AVPacket *pkt) |
| { |
| int frame_size; |
| |
| *pnum = 0; |
| *pden = 0; |
| switch(st->codec->codec_type) { |
| case CODEC_TYPE_VIDEO: |
| if(st->time_base.num*1000LL > st->time_base.den){ |
| *pnum = st->time_base.num; |
| *pden = st->time_base.den; |
| }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){ |
| *pnum = st->codec->time_base.num; |
| *pden = st->codec->time_base.den; |
| if (pc && pc->repeat_pict) { |
| *pnum = (*pnum) * (1 + pc->repeat_pict); |
| } |
| } |
| break; |
| case CODEC_TYPE_AUDIO: |
| frame_size = get_audio_frame_size(st->codec, pkt->size); |
| if (frame_size < 0) |
| break; |
| *pnum = frame_size; |
| *pden = st->codec->sample_rate; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static int is_intra_only(AVCodecContext *enc){ |
| if(enc->codec_type == CODEC_TYPE_AUDIO){ |
| return 1; |
| }else if(enc->codec_type == CODEC_TYPE_VIDEO){ |
| switch(enc->codec_id){ |
| case CODEC_ID_MJPEG: |
| case CODEC_ID_MJPEGB: |
| case CODEC_ID_LJPEG: |
| case CODEC_ID_RAWVIDEO: |
| case CODEC_ID_DVVIDEO: |
| case CODEC_ID_HUFFYUV: |
| case CODEC_ID_FFVHUFF: |
| case CODEC_ID_ASV1: |
| case CODEC_ID_ASV2: |
| case CODEC_ID_VCR1: |
| case CODEC_ID_DNXHD: |
| case CODEC_ID_JPEG2000: |
| return 1; |
| default: break; |
| } |
| } |
| return 0; |
| } |
| |
| static void update_initial_timestamps(AVFormatContext *s, int stream_index, |
| int64_t dts, int64_t pts) |
| { |
| AVStream *st= s->streams[stream_index]; |
| AVPacketList *pktl= s->packet_buffer; |
| |
| if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE) |
| return; |
| |
| st->first_dts= dts - st->cur_dts; |
| st->cur_dts= dts; |
| |
| for(; pktl; pktl= pktl->next){ |
| if(pktl->pkt.stream_index != stream_index) |
| continue; |
| //FIXME think more about this check |
| if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts) |
| pktl->pkt.pts += st->first_dts; |
| |
| if(pktl->pkt.dts != AV_NOPTS_VALUE) |
| pktl->pkt.dts += st->first_dts; |
| |
| if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE) |
| st->start_time= pktl->pkt.pts; |
| } |
| if (st->start_time == AV_NOPTS_VALUE) |
| st->start_time = pts; |
| } |
| |
| static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt) |
| { |
| AVPacketList *pktl= s->packet_buffer; |
| int64_t cur_dts= 0; |
| |
| if(st->first_dts != AV_NOPTS_VALUE){ |
| cur_dts= st->first_dts; |
| for(; pktl; pktl= pktl->next){ |
| if(pktl->pkt.stream_index == pkt->stream_index){ |
| if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration) |
| break; |
| cur_dts -= pkt->duration; |
| } |
| } |
| pktl= s->packet_buffer; |
| st->first_dts = cur_dts; |
| }else if(st->cur_dts) |
| return; |
| |
| for(; pktl; pktl= pktl->next){ |
| if(pktl->pkt.stream_index != pkt->stream_index) |
| continue; |
| if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE |
| && !pktl->pkt.duration){ |
| pktl->pkt.dts= cur_dts; |
| if(!st->codec->has_b_frames) |
| pktl->pkt.pts= cur_dts; |
| cur_dts += pkt->duration; |
| pktl->pkt.duration= pkt->duration; |
| }else |
| break; |
| } |
| if(st->first_dts == AV_NOPTS_VALUE) |
| st->cur_dts= cur_dts; |
| } |
| |
| static void compute_pkt_fields(AVFormatContext *s, AVStream *st, |
| AVCodecParserContext *pc, AVPacket *pkt) |
| { |
| int num, den, presentation_delayed, delay, i; |
| int64_t offset; |
| |
| /* do we have a video B-frame ? */ |
| delay= st->codec->has_b_frames; |
| presentation_delayed = 0; |
| /* XXX: need has_b_frame, but cannot get it if the codec is |
| not initialized */ |
| if (delay && |
| pc && pc->pict_type != FF_B_TYPE) |
| presentation_delayed = 1; |
| |
| if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63 |
| /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){ |
| pkt->dts -= 1LL<<st->pts_wrap_bits; |
| } |
| |
| // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg) |
| // we take the conservative approach and discard both |
| // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly. |
| if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){ |
| av_log(s, AV_LOG_WARNING, "invalid dts/pts combination\n"); |
| pkt->dts= pkt->pts= AV_NOPTS_VALUE; |
| } |
| |
| if (pkt->duration == 0) { |
| compute_frame_duration(&num, &den, st, pc, pkt); |
| if (den && num) { |
| pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num); |
| |
| if(pkt->duration != 0 && s->packet_buffer) |
| update_initial_durations(s, st, pkt); |
| } |
| } |
| |
| /* correct timestamps with byte offset if demuxers only have timestamps |
| on packet boundaries */ |
| if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){ |
| /* this will estimate bitrate based on this frame's duration and size */ |
| offset = av_rescale(pc->offset, pkt->duration, pkt->size); |
| if(pkt->pts != AV_NOPTS_VALUE) |
| pkt->pts += offset; |
| if(pkt->dts != AV_NOPTS_VALUE) |
| pkt->dts += offset; |
| } |
| |
| if (pc && pc->dts_sync_point >= 0) { |
| // we have synchronization info from the parser |
| int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num; |
| if (den > 0) { |
| int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den; |
| if (pkt->dts != AV_NOPTS_VALUE) { |
| // got DTS from the stream, update reference timestamp |
| st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den; |
| pkt->pts = pkt->dts + pc->pts_dts_delta * num / den; |
| } else if (st->reference_dts != AV_NOPTS_VALUE) { |
| // compute DTS based on reference timestamp |
| pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den; |
| pkt->pts = pkt->dts + pc->pts_dts_delta * num / den; |
| } |
| if (pc->dts_sync_point > 0) |
| st->reference_dts = pkt->dts; // new reference |
| } |
| } |
| |
| /* This may be redundant, but it should not hurt. */ |
| if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts) |
| presentation_delayed = 1; |
| |
| // av_log(NULL, AV_LOG_DEBUG, "IN delayed:%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64" st:%d pc:%p\n", presentation_delayed, pkt->pts, pkt->dts, st->cur_dts, pkt->stream_index, pc); |
| /* interpolate PTS and DTS if they are not present */ |
| //We skip H264 currently because delay and has_b_frames are not reliably set |
| if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){ |
| if (presentation_delayed) { |
| /* DTS = decompression timestamp */ |
| /* PTS = presentation timestamp */ |
| if (pkt->dts == AV_NOPTS_VALUE) |
| pkt->dts = st->last_IP_pts; |
| update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); |
| if (pkt->dts == AV_NOPTS_VALUE) |
| pkt->dts = st->cur_dts; |
| |
| /* this is tricky: the dts must be incremented by the duration |
| of the frame we are displaying, i.e. the last I- or P-frame */ |
| if (st->last_IP_duration == 0) |
| st->last_IP_duration = pkt->duration; |
| if(pkt->dts != AV_NOPTS_VALUE) |
| st->cur_dts = pkt->dts + st->last_IP_duration; |
| st->last_IP_duration = pkt->duration; |
| st->last_IP_pts= pkt->pts; |
| /* cannot compute PTS if not present (we can compute it only |
| by knowing the future */ |
| } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){ |
| if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){ |
| int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts); |
| int64_t new_diff= FFABS(st->cur_dts - pkt->pts); |
| if(old_diff < new_diff && old_diff < (pkt->duration>>3)){ |
| pkt->pts += pkt->duration; |
| // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%"PRId64" size:%d\n", pkt->stream_index, old_diff, new_diff, pkt->duration, st->cur_dts, pkt->size); |
| } |
| } |
| |
| /* presentation is not delayed : PTS and DTS are the same */ |
| if(pkt->pts == AV_NOPTS_VALUE) |
| pkt->pts = pkt->dts; |
| update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts); |
| if(pkt->pts == AV_NOPTS_VALUE) |
| pkt->pts = st->cur_dts; |
| pkt->dts = pkt->pts; |
| if(pkt->pts != AV_NOPTS_VALUE) |
| st->cur_dts = pkt->pts + pkt->duration; |
| } |
| } |
| |
| if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){ |
| st->pts_buffer[0]= pkt->pts; |
| for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++) |
| FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]); |
| if(pkt->dts == AV_NOPTS_VALUE) |
| pkt->dts= st->pts_buffer[0]; |
| if(st->codec->codec_id == CODEC_ID_H264){ //we skiped it above so we try here |
| update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet |
| } |
| if(pkt->dts > st->cur_dts) |
| st->cur_dts = pkt->dts; |
| } |
| |
| // av_log(NULL, AV_LOG_ERROR, "OUTdelayed:%d/%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64"\n", presentation_delayed, delay, pkt->pts, pkt->dts, st->cur_dts); |
| |
| /* update flags */ |
| if(is_intra_only(st->codec)) |
| pkt->flags |= PKT_FLAG_KEY; |
| else if (pc) { |
| pkt->flags = 0; |
| /* keyframe computation */ |
| if (pc->key_frame == 1) |
| pkt->flags |= PKT_FLAG_KEY; |
| else if (pc->key_frame == -1 && pc->pict_type == FF_I_TYPE) |
| pkt->flags |= PKT_FLAG_KEY; |
| } |
| if (pc) |
| pkt->convergence_duration = pc->convergence_duration; |
| } |
| |
| void av_destruct_packet_nofree(AVPacket *pkt) |
| { |
| pkt->data = NULL; pkt->size = 0; |
| } |
| |
| static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt) |
| { |
| AVStream *st; |
| int len, ret, i; |
| |
| av_init_packet(pkt); |
| |
| for(;;) { |
| /* select current input stream component */ |
| st = s->cur_st; |
| if (st) { |
| if (!st->need_parsing || !st->parser) { |
| /* no parsing needed: we just output the packet as is */ |
| /* raw data support */ |
| *pkt = st->cur_pkt; st->cur_pkt.data= NULL; |
| compute_pkt_fields(s, st, NULL, pkt); |
| s->cur_st = NULL; |
| break; |
| } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) { |
| len = av_parser_parse(st->parser, st->codec, &pkt->data, &pkt->size, |
| st->cur_ptr, st->cur_len, |
| st->cur_pkt.pts, st->cur_pkt.dts); |
| st->cur_pkt.pts = AV_NOPTS_VALUE; |
| st->cur_pkt.dts = AV_NOPTS_VALUE; |
| /* increment read pointer */ |
| st->cur_ptr += len; |
| st->cur_len -= len; |
| |
| /* return packet if any */ |
| if (pkt->size) { |
| pkt->pos = st->cur_pkt.pos; // Isn't quite accurate but close. |
| got_packet: |
| pkt->duration = 0; |
| pkt->stream_index = st->index; |
| pkt->pts = st->parser->pts; |
| pkt->dts = st->parser->dts; |
| pkt->destruct = av_destruct_packet_nofree; |
| compute_pkt_fields(s, st, st->parser, pkt); |
| |
| if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & PKT_FLAG_KEY){ |
| ff_reduce_index(s, st->index); |
| av_add_index_entry(st, st->parser->frame_offset, pkt->dts, |
| 0, 0, AVINDEX_KEYFRAME); |
| } |
| |
| break; |
| } |
| } else { |
| /* free packet */ |
| av_free_packet(&st->cur_pkt); |
| s->cur_st = NULL; |
| } |
| } else { |
| AVPacket cur_pkt; |
| /* read next packet */ |
| ret = av_read_packet(s, &cur_pkt); |
| if (ret < 0) { |
| if (ret == AVERROR(EAGAIN)) |
| return ret; |
| /* return the last frames, if any */ |
| for(i = 0; i < s->nb_streams; i++) { |
| st = s->streams[i]; |
| if (st->parser && st->need_parsing) { |
| av_parser_parse(st->parser, st->codec, |
| &pkt->data, &pkt->size, |
| NULL, 0, |
| AV_NOPTS_VALUE, AV_NOPTS_VALUE); |
| if (pkt->size) |
| goto got_packet; |
| } |
| } |
| /* no more packets: really terminate parsing */ |
| return ret; |
| } |
| st = s->streams[cur_pkt.stream_index]; |
| st->cur_pkt= cur_pkt; |
| |
| if(st->cur_pkt.pts != AV_NOPTS_VALUE && |
| st->cur_pkt.dts != AV_NOPTS_VALUE && |
| st->cur_pkt.pts < st->cur_pkt.dts){ |
| av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n", |
| st->cur_pkt.stream_index, |
| st->cur_pkt.pts, |
| st->cur_pkt.dts, |
| st->cur_pkt.size); |
| // av_free_packet(&st->cur_pkt); |
| // return -1; |
| } |
| |
| if(s->debug & FF_FDEBUG_TS) |
| av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, flags=%d\n", |
| st->cur_pkt.stream_index, |
| st->cur_pkt.pts, |
| st->cur_pkt.dts, |
| st->cur_pkt.size, |
| st->cur_pkt.flags); |
| |
| s->cur_st = st; |
| st->cur_ptr = st->cur_pkt.data; |
| st->cur_len = st->cur_pkt.size; |
| if (st->need_parsing && !st->parser) { |
| st->parser = av_parser_init(st->codec->codec_id); |
| if (!st->parser) { |
| /* no parser available: just output the raw packets */ |
| st->need_parsing = AVSTREAM_PARSE_NONE; |
| }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){ |
| st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; |
| } |
| if(st->parser && (s->iformat->flags & AVFMT_GENERIC_INDEX)){ |
| st->parser->next_frame_offset= |
| st->parser->cur_offset= st->cur_pkt.pos; |
| } |
| } |
| } |
| } |
| if(s->debug & FF_FDEBUG_TS) |
| av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, flags=%d\n", |
| pkt->stream_index, |
| pkt->pts, |
| pkt->dts, |
| pkt->size, |
| pkt->flags); |
| |
| return 0; |
| } |
| |
| int av_read_frame(AVFormatContext *s, AVPacket *pkt) |
| { |
| AVPacketList *pktl; |
| int eof=0; |
| const int genpts= s->flags & AVFMT_FLAG_GENPTS; |
| |
| for(;;){ |
| pktl = s->packet_buffer; |
| if (pktl) { |
| AVPacket *next_pkt= &pktl->pkt; |
| |
| if(genpts && next_pkt->dts != AV_NOPTS_VALUE){ |
| while(pktl && next_pkt->pts == AV_NOPTS_VALUE){ |
| if( pktl->pkt.stream_index == next_pkt->stream_index |
| && next_pkt->dts < pktl->pkt.dts |
| && pktl->pkt.pts != pktl->pkt.dts //not b frame |
| /*&& pktl->pkt.dts != AV_NOPTS_VALUE*/){ |
| next_pkt->pts= pktl->pkt.dts; |
| } |
| pktl= pktl->next; |
| } |
| pktl = s->packet_buffer; |
| } |
| |
| if( next_pkt->pts != AV_NOPTS_VALUE |
| || next_pkt->dts == AV_NOPTS_VALUE |
| || !genpts || eof){ |
| /* read packet from packet buffer, if there is data */ |
| *pkt = *next_pkt; |
| s->packet_buffer = pktl->next; |
| av_free(pktl); |
| return 0; |
| } |
| } |
| if(genpts){ |
| int ret= av_read_frame_internal(s, pkt); |
| if(ret<0){ |
| if(pktl && ret != AVERROR(EAGAIN)){ |
| eof=1; |
| continue; |
| }else |
| return ret; |
| } |
| |
| if(av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt, |
| &s->packet_buffer_end)) < 0) |
| return AVERROR(ENOMEM); |
| }else{ |
| assert(!s->packet_buffer); |
| return av_read_frame_internal(s, pkt); |
| } |
| } |
| } |
| |
| /* XXX: suppress the packet queue */ |
| static void flush_packet_queue(AVFormatContext *s) |
| { |
| AVPacketList *pktl; |
| |
| for(;;) { |
| pktl = s->packet_buffer; |
| if (!pktl) |
| break; |
| s->packet_buffer = pktl->next; |
| av_free_packet(&pktl->pkt); |
| av_free(pktl); |
| } |
| } |
| |
| /*******************************************************/ |
| /* seek support */ |
| |
| int av_find_default_stream_index(AVFormatContext *s) |
| { |
| int first_audio_index = -1; |
| int i; |
| AVStream *st; |
| |
| if (s->nb_streams <= 0) |
| return -1; |
| for(i = 0; i < s->nb_streams; i++) { |
| st = s->streams[i]; |
| if (st->codec->codec_type == CODEC_TYPE_VIDEO) { |
| return i; |
| } |
| if (first_audio_index < 0 && st->codec->codec_type == CODEC_TYPE_AUDIO) |
| first_audio_index = i; |
| } |
| return first_audio_index >= 0 ? first_audio_index : 0; |
| } |
| |
| /** |
| * Flush the frame reader. |
| */ |
| static void av_read_frame_flush(AVFormatContext *s) |
| { |
| AVStream *st; |
| int i; |
| |
| flush_packet_queue(s); |
| |
| s->cur_st = NULL; |
| |
| /* for each stream, reset read state */ |
| for(i = 0; i < s->nb_streams; i++) { |
| st = s->streams[i]; |
| |
| if (st->parser) { |
| av_parser_close(st->parser); |
| st->parser = NULL; |
| av_free_packet(&st->cur_pkt); |
| } |
| st->last_IP_pts = AV_NOPTS_VALUE; |
| st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */ |
| st->reference_dts = AV_NOPTS_VALUE; |
| /* fail safe */ |
| st->cur_ptr = NULL; |
| st->cur_len = 0; |
| } |
| } |
| |
| void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){ |
| int i; |
| |
| for(i = 0; i < s->nb_streams; i++) { |
| AVStream *st = s->streams[i]; |
| |
| st->cur_dts = av_rescale(timestamp, |
| st->time_base.den * (int64_t)ref_st->time_base.num, |
| st->time_base.num * (int64_t)ref_st->time_base.den); |
| } |
| } |
| |
| void ff_reduce_index(AVFormatContext *s, int stream_index) |
| { |
| AVStream *st= s->streams[stream_index]; |
| unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry); |
| |
| if((unsigned)st->nb_index_entries >= max_entries){ |
| int i; |
| for(i=0; 2*i<st->nb_index_entries; i++) |
| st->index_entries[i]= st->index_entries[2*i]; |
| st->nb_index_entries= i; |
| } |
| } |
| |
| int av_add_index_entry(AVStream *st, |
| int64_t pos, int64_t timestamp, int size, int distance, int flags) |
| { |
| AVIndexEntry *entries, *ie; |
| int index; |
| |
| if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry)) |
| return -1; |
| |
| entries = av_fast_realloc(st->index_entries, |
| &st->index_entries_allocated_size, |
| (st->nb_index_entries + 1) * |
| sizeof(AVIndexEntry)); |
| if(!entries) |
| return -1; |
| |
| st->index_entries= entries; |
| |
| index= av_index_search_timestamp(st, timestamp, AVSEEK_FLAG_ANY); |
| |
| if(index<0){ |
| index= st->nb_index_entries++; |
| ie= &entries[index]; |
| assert(index==0 || ie[-1].timestamp < timestamp); |
| }else{ |
| ie= &entries[index]; |
| if(ie->timestamp != timestamp){ |
| if(ie->timestamp <= timestamp) |
| return -1; |
| memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(st->nb_index_entries - index)); |
| st->nb_index_entries++; |
| }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance |
| distance= ie->min_distance; |
| } |
| |
| ie->pos = pos; |
| ie->timestamp = timestamp; |
| ie->min_distance= distance; |
| ie->size= size; |
| ie->flags = flags; |
| |
| return index; |
| } |
| |
| int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, |
| int flags) |
| { |
| AVIndexEntry *entries= st->index_entries; |
| int nb_entries= st->nb_index_entries; |
| int a, b, m; |
| int64_t timestamp; |
| |
| a = - 1; |
| b = nb_entries; |
| |
| while (b - a > 1) { |
| m = (a + b) >> 1; |
| timestamp = entries[m].timestamp; |
| if(timestamp >= wanted_timestamp) |
| b = m; |
| if(timestamp <= wanted_timestamp) |
| a = m; |
| } |
| m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b; |
| |
| if(!(flags & AVSEEK_FLAG_ANY)){ |
| while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){ |
| m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1; |
| } |
| } |
| |
| if(m == nb_entries) |
| return -1; |
| return m; |
| } |
| |
| #define DEBUG_SEEK |
| |
| int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){ |
| AVInputFormat *avif= s->iformat; |
| int64_t pos_min, pos_max, pos, pos_limit; |
| int64_t ts_min, ts_max, ts; |
| int index; |
| AVStream *st; |
| |
| if (stream_index < 0) |
| return -1; |
| |
| #ifdef DEBUG_SEEK |
| av_log(s, AV_LOG_DEBUG, "read_seek: %d %"PRId64"\n", stream_index, target_ts); |
| #endif |
| |
| ts_max= |
| ts_min= AV_NOPTS_VALUE; |
| pos_limit= -1; //gcc falsely says it may be uninitialized |
| |
| st= s->streams[stream_index]; |
| if(st->index_entries){ |
| AVIndexEntry *e; |
| |
| index= av_index_search_timestamp(st, target_ts, flags | AVSEEK_FLAG_BACKWARD); //FIXME whole func must be checked for non-keyframe entries in index case, especially read_timestamp() |
| index= FFMAX(index, 0); |
| e= &st->index_entries[index]; |
| |
| if(e->timestamp <= target_ts || e->pos == e->min_distance){ |
| pos_min= e->pos; |
| ts_min= e->timestamp; |
| #ifdef DEBUG_SEEK |
| av_log(s, AV_LOG_DEBUG, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n", |
| pos_min,ts_min); |
| #endif |
| }else{ |
| assert(index==0); |
| } |
| |
| index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD); |
| assert(index < st->nb_index_entries); |
| if(index >= 0){ |
| e= &st->index_entries[index]; |
| assert(e->timestamp >= target_ts); |
| pos_max= e->pos; |
| ts_max= e->timestamp; |
| pos_limit= pos_max - e->min_distance; |
| #ifdef DEBUG_SEEK |
| av_log(s, AV_LOG_DEBUG, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n", |
| pos_max,pos_limit, ts_max); |
| #endif |
| } |
| } |
| |
| pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp); |
| if(pos<0) |
| return -1; |
| |
| /* do the seek */ |
| url_fseek(s->pb, pos, SEEK_SET); |
| |
| av_update_cur_dts(s, st, ts); |
| |
| return 0; |
| } |
| |
| int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )){ |
| int64_t pos, ts; |
| int64_t start_pos, filesize; |
| int no_change; |
| |
| #ifdef DEBUG_SEEK |
| av_log(s, AV_LOG_DEBUG, "gen_seek: %d %"PRId64"\n", stream_index, target_ts); |
| #endif |
| |
| if(ts_min == AV_NOPTS_VALUE){ |
| pos_min = s->data_offset; |
| ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
| if (ts_min == AV_NOPTS_VALUE) |
| return -1; |
| } |
| |
| if(ts_max == AV_NOPTS_VALUE){ |
| int step= 1024; |
| filesize = url_fsize(s->pb); |
| pos_max = filesize - 1; |
| do{ |
| pos_max -= step; |
| ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step); |
| step += step; |
| }while(ts_max == AV_NOPTS_VALUE && pos_max >= step); |
| if (ts_max == AV_NOPTS_VALUE) |
| return -1; |
| |
| for(;;){ |
| int64_t tmp_pos= pos_max + 1; |
| int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX); |
| if(tmp_ts == AV_NOPTS_VALUE) |
| break; |
| ts_max= tmp_ts; |
| pos_max= tmp_pos; |
| if(tmp_pos >= filesize) |
| break; |
| } |
| pos_limit= pos_max; |
| } |
| |
| if(ts_min > ts_max){ |
| return -1; |
| }else if(ts_min == ts_max){ |
| pos_limit= pos_min; |
| } |
| |
| no_change=0; |
| while (pos_min < pos_limit) { |
| #ifdef DEBUG_SEEK |
| av_log(s, AV_LOG_DEBUG, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n", |
| pos_min, pos_max, |
| ts_min, ts_max); |
| #endif |
| assert(pos_limit <= pos_max); |
| |
| if(no_change==0){ |
| int64_t approximate_keyframe_distance= pos_max - pos_limit; |
| // interpolate position (better than dichotomy) |
| pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min) |
| + pos_min - approximate_keyframe_distance; |
| }else if(no_change==1){ |
| // bisection, if interpolation failed to change min or max pos last time |
| pos = (pos_min + pos_limit)>>1; |
| }else{ |
| /* linear search if bisection failed, can only happen if there |
| are very few or no keyframes between min/max */ |
| pos=pos_min; |
| } |
| if(pos <= pos_min) |
| pos= pos_min + 1; |
| else if(pos > pos_limit) |
| pos= pos_limit; |
| start_pos= pos; |
| |
| ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1 |
| if(pos == pos_max) |
| no_change++; |
| else |
| no_change=0; |
| #ifdef DEBUG_SEEK |
| av_log(s, AV_LOG_DEBUG, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n", pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts, pos_limit, start_pos, no_change); |
| #endif |
| if(ts == AV_NOPTS_VALUE){ |
| av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n"); |
| return -1; |
| } |
| assert(ts != AV_NOPTS_VALUE); |
| if (target_ts <= ts) { |
| pos_limit = start_pos - 1; |
| pos_max = pos; |
| ts_max = ts; |
| } |
| if (target_ts >= ts) { |
| pos_min = pos; |
| ts_min = ts; |
| } |
| } |
| |
| pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max; |
| ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max; |
| #ifdef DEBUG_SEEK |
| pos_min = pos; |
| ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
| pos_min++; |
| ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
| av_log(s, AV_LOG_DEBUG, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n", |
| pos, ts_min, target_ts, ts_max); |
| #endif |
| *ts_ret= ts; |
| return pos; |
| } |
| |
| static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){ |
| int64_t pos_min, pos_max; |
| #if 0 |
| AVStream *st; |
| |
| if (stream_index < 0) |
| return -1; |
| |
| st= s->streams[stream_index]; |
| #endif |
| |
| pos_min = s->data_offset; |
| pos_max = url_fsize(s->pb) - 1; |
| |
| if (pos < pos_min) pos= pos_min; |
| else if(pos > pos_max) pos= pos_max; |
| |
| url_fseek(s->pb, pos, SEEK_SET); |
| |
| #if 0 |
| av_update_cur_dts(s, st, ts); |
| #endif |
| return 0; |
| } |
| |
| static int av_seek_frame_generic(AVFormatContext *s, |
| int stream_index, int64_t timestamp, int flags) |
| { |
| int index, ret; |
| AVStream *st; |
| AVIndexEntry *ie; |
| |
| st = s->streams[stream_index]; |
| |
| index = av_index_search_timestamp(st, timestamp, flags); |
| |
| if(index < 0 || index==st->nb_index_entries-1){ |
| int i; |
| AVPacket pkt; |
| |
| if(st->nb_index_entries){ |
| assert(st->index_entries); |
| ie= &st->index_entries[st->nb_index_entries-1]; |
| if ((ret = url_fseek(s->pb, ie->pos, SEEK_SET)) < 0) |
| return ret; |
| av_update_cur_dts(s, st, ie->timestamp); |
| }else{ |
| if ((ret = url_fseek(s->pb, 0, SEEK_SET)) < 0) |
| return ret; |
| } |
| for(i=0;; i++) { |
| int ret = av_read_frame(s, &pkt); |
| if(ret<0) |
| break; |
| av_free_packet(&pkt); |
| if(stream_index == pkt.stream_index){ |
| if((pkt.flags & PKT_FLAG_KEY) && pkt.dts > timestamp) |
| break; |
| } |
| } |
| index = av_index_search_timestamp(st, timestamp, flags); |
| } |
| if (index < 0) |
| return -1; |
| |
| av_read_frame_flush(s); |
| if (s->iformat->read_seek){ |
| if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0) |
| return 0; |
| } |
| ie = &st->index_entries[index]; |
| if ((ret = url_fseek(s->pb, ie->pos, SEEK_SET)) < 0) |
| return ret; |
| av_update_cur_dts(s, st, ie->timestamp); |
| |
| return 0; |
| } |
| |
| int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) |
| { |
| int ret; |
| AVStream *st; |
| |
| av_read_frame_flush(s); |
| |
| if(flags & AVSEEK_FLAG_BYTE) |
| return av_seek_frame_byte(s, stream_index, timestamp, flags); |
| |
| if(stream_index < 0){ |
| stream_index= av_find_default_stream_index(s); |
| if(stream_index < 0) |
| return -1; |
| |
| st= s->streams[stream_index]; |
| /* timestamp for default must be expressed in AV_TIME_BASE units */ |
| timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num); |
| } |
| |
| /* first, we try the format specific seek */ |
| if (s->iformat->read_seek) |
| ret = s->iformat->read_seek(s, stream_index, timestamp, flags); |
| else |
| ret = -1; |
| if (ret >= 0) { |
| return 0; |
| } |
| |
| if(s->iformat->read_timestamp) |
| return av_seek_frame_binary(s, stream_index, timestamp, flags); |
| else |
| return av_seek_frame_generic(s, stream_index, timestamp, flags); |
| } |
| |
| /*******************************************************/ |
| |
| /** |
| * Returns TRUE if the stream has accurate duration in any stream. |
| * |
| * @return TRUE if the stream has accurate duration for at least one component. |
| */ |
| static int av_has_duration(AVFormatContext *ic) |
| { |
| int i; |
| AVStream *st; |
| |
| for(i = 0;i < ic->nb_streams; i++) { |
| st = ic->streams[i]; |
| if (st->duration != AV_NOPTS_VALUE) |
| return 1; |
| } |
| return 0; |
| } |
| |
| /** |
| * Estimate the stream timings from the one of each components. |
| * |
| * Also computes the global bitrate if possible. |
| */ |
| static void av_update_stream_timings(AVFormatContext *ic) |
| { |
| int64_t start_time, start_time1, end_time, end_time1; |
| int64_t duration, duration1; |
| int i; |
| AVStream *st; |
| |
| start_time = INT64_MAX; |
| end_time = INT64_MIN; |
| duration = INT64_MIN; |
| for(i = 0;i < ic->nb_streams; i++) { |
| st = ic->streams[i]; |
| if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) { |
| start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q); |
| if (start_time1 < start_time) |
| start_time = start_time1; |
| if (st->duration != AV_NOPTS_VALUE) { |
| end_time1 = start_time1 |
| + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q); |
| if (end_time1 > end_time) |
| end_time = end_time1; |
| } |
| } |
| if (st->duration != AV_NOPTS_VALUE) { |
| duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q); |
| if (duration1 > duration) |
| duration = duration1; |
| } |
| } |
| if (start_time != INT64_MAX) { |
| ic->start_time = start_time; |
| if (end_time != INT64_MIN) { |
| if (end_time - start_time > duration) |
| duration = end_time - start_time; |
| } |
| } |
| if (duration != INT64_MIN) { |
| ic->duration = duration; |
| if (ic->file_size > 0) { |
| /* compute the bitrate */ |
| ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE / |
| (double)ic->duration; |
| } |
| } |
| } |
| |
| static void fill_all_stream_timings(AVFormatContext *ic) |
| { |
| int i; |
| AVStream *st; |
| |
| av_update_stream_timings(ic); |
| for(i = 0;i < ic->nb_streams; i++) { |
| st = ic->streams[i]; |
| if (st->start_time == AV_NOPTS_VALUE) { |
| if(ic->start_time != AV_NOPTS_VALUE) |
| st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base); |
| if(ic->duration != AV_NOPTS_VALUE) |
| st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base); |
| } |
| } |
| } |
| |
| static void av_estimate_timings_from_bit_rate(AVFormatContext *ic) |
| { |
| int64_t filesize, duration; |
| int bit_rate, i; |
| AVStream *st; |
| |
| /* if bit_rate is already set, we believe it */ |
| if (ic->bit_rate == 0) { |
| bit_rate = 0; |
| for(i=0;i<ic->nb_streams;i++) { |
| st = ic->streams[i]; |
| bit_rate += st->codec->bit_rate; |
| } |
| ic->bit_rate = bit_rate; |
| } |
| |
| /* if duration is already set, we believe it */ |
| if (ic->duration == AV_NOPTS_VALUE && |
| ic->bit_rate != 0 && |
| ic->file_size != 0) { |
| filesize = ic->file_size; |
| if (filesize > 0) { |
| for(i = 0; i < ic->nb_streams; i++) { |
| st = ic->streams[i]; |
| duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num); |
| if (st->duration == AV_NOPTS_VALUE) |
| st->duration = duration; |
| } |
| } |
| } |
| } |
| |
| #define DURATION_MAX_READ_SIZE 250000 |
| |
| /* only usable for MPEG-PS streams */ |
| static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset) |
| { |
| AVPacket pkt1, *pkt = &pkt1; |
| AVStream *st; |
| int read_size, i, ret; |
| int64_t end_time; |
| int64_t filesize, offset, duration; |
| |
| ic->cur_st = NULL; |
| |
| /* flush packet queue */ |
| flush_packet_queue(ic); |
| |
| for(i=0;i<ic->nb_streams;i++) { |
| st = ic->streams[i]; |
| if (st->parser) { |
| av_parser_close(st->parser); |
| st->parser= NULL; |
| av_free_packet(&st->cur_pkt); |
| } |
| } |
| |
| /* we read the first packets to get the first PTS (not fully |
| accurate, but it is enough now) */ |
| url_fseek(ic->pb, 0, SEEK_SET); |
| read_size = 0; |
| for(;;) { |
| if (read_size >= DURATION_MAX_READ_SIZE) |
| break; |
| /* if all info is available, we can stop */ |
| for(i = 0;i < ic->nb_streams; i++) { |
| st = ic->streams[i]; |
| if (st->start_time == AV_NOPTS_VALUE) |
| break; |
| } |
| if (i == ic->nb_streams) |
| break; |
| |
| ret = av_read_packet(ic, pkt); |
| if (ret != 0) |
| break; |
| read_size += pkt->size; |
| st = ic->streams[pkt->stream_index]; |
| if (pkt->pts != AV_NOPTS_VALUE) { |
| if (st->start_time == AV_NOPTS_VALUE) |
| st->start_time = pkt->pts; |
| } |
| av_free_packet(pkt); |
| } |
| |
| /* estimate the end time (duration) */ |
| /* XXX: may need to support wrapping */ |
| filesize = ic->file_size; |
| offset = filesize - DURATION_MAX_READ_SIZE; |
| if (offset < 0) |
| offset = 0; |
| |
| url_fseek(ic->pb, offset, SEEK_SET); |
| read_size = 0; |
| for(;;) { |
| if (read_size >= DURATION_MAX_READ_SIZE) |
| break; |
| |
| ret = av_read_packet(ic, pkt); |
| if (ret != 0) |
| break; |
| read_size += pkt->size; |
| st = ic->streams[pkt->stream_index]; |
| if (pkt->pts != AV_NOPTS_VALUE && |
| st->start_time != AV_NOPTS_VALUE) { |
| end_time = pkt->pts; |
| duration = end_time - st->start_time; |
| if (duration > 0) { |
| if (st->duration == AV_NOPTS_VALUE || |
| st->duration < duration) |
| st->duration = duration; |
| } |
| } |
| av_free_packet(pkt); |
| } |
| |
| fill_all_stream_timings(ic); |
| |
| url_fseek(ic->pb, old_offset, SEEK_SET); |
| for(i=0; i<ic->nb_streams; i++){ |
| st= ic->streams[i]; |
| st->cur_dts= st->first_dts; |
| st->last_IP_pts = AV_NOPTS_VALUE; |
| } |
| } |
| |
| static void av_estimate_timings(AVFormatContext *ic, int64_t old_offset) |
| { |
| int64_t file_size; |
| |
| /* get the file size, if possible */ |
| if (ic->iformat->flags & AVFMT_NOFILE) { |
| file_size = 0; |
| } else { |
| file_size = url_fsize(ic->pb); |
| if (file_size < 0) |
| file_size = 0; |
| } |
| ic->file_size = file_size; |
| |
| if ((!strcmp(ic->iformat->name, "mpeg") || |
| !strcmp(ic->iformat->name, "mpegts")) && |
| file_size && !url_is_streamed(ic->pb)) { |
| /* get accurate estimate from the PTSes */ |
| av_estimate_timings_from_pts(ic, old_offset); |
| } else if (av_has_duration(ic)) { |
| /* at least one component has timings - we use them for all |
| the components */ |
| fill_all_stream_timings(ic); |
| } else { |
| /* less precise: use bitrate info */ |
| av_estimate_timings_from_bit_rate(ic); |
| } |
| av_update_stream_timings(ic); |
| |
| #if 0 |
| { |
| int i; |
| AVStream *st; |
| for(i = 0;i < ic->nb_streams; i++) { |
| st = ic->streams[i]; |
| printf("%d: start_time: %0.3f duration: %0.3f\n", |
| i, (double)st->start_time / AV_TIME_BASE, |
| (double)st->duration / AV_TIME_BASE); |
| } |
| printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n", |
| (double)ic->start_time / AV_TIME_BASE, |
| (double)ic->duration / AV_TIME_BASE, |
| ic->bit_rate / 1000); |
| } |
| #endif |
| } |
| |
| static int has_codec_parameters(AVCodecContext *enc) |
| { |
| int val; |
| switch(enc->codec_type) { |
| case CODEC_TYPE_AUDIO: |
| val = enc->sample_rate && enc->channels && enc->sample_fmt != SAMPLE_FMT_NONE; |
| if(!enc->frame_size && |
| (enc->codec_id == CODEC_ID_VORBIS || |
| enc->codec_id == CODEC_ID_AAC)) |
| return 0; |
| break; |
| case CODEC_TYPE_VIDEO: |
| val = enc->width && enc->pix_fmt != PIX_FMT_NONE; |
| break; |
| default: |
| val = 1; |
| break; |
| } |
| return enc->codec_id != CODEC_ID_NONE && val != 0; |
| } |
| |
| static int try_decode_frame(AVStream *st, const uint8_t *data, int size) |
| { |
| int16_t *samples; |
| AVCodec *codec; |
| int got_picture, data_size, ret=0; |
| AVFrame picture; |
| |
| if(!st->codec->codec){ |
| codec = avcodec_find_decoder(st->codec->codec_id); |
| if (!codec) |
| return -1; |
| ret = avcodec_open(st->codec, codec); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if(!has_codec_parameters(st->codec)){ |
| switch(st->codec->codec_type) { |
| case CODEC_TYPE_VIDEO: |
| ret = avcodec_decode_video(st->codec, &picture, |
| &got_picture, data, size); |
| break; |
| case CODEC_TYPE_AUDIO: |
| data_size = FFMAX(size, AVCODEC_MAX_AUDIO_FRAME_SIZE); |
| samples = av_malloc(data_size); |
| if (!samples) |
| goto fail; |
| ret = avcodec_decode_audio2(st->codec, samples, |
| &data_size, data, size); |
| av_free(samples); |
| break; |
| default: |
| break; |
| } |
| } |
| fail: |
| return ret; |
| } |
| |
| unsigned int codec_get_tag(const AVCodecTag *tags, int id) |
| { |
| while (tags->id != CODEC_ID_NONE) { |
| if (tags->id == id) |
| return tags->tag; |
| tags++; |
| } |
| return 0; |
| } |
| |
| enum CodecID codec_get_id(const AVCodecTag *tags, unsigned int tag) |
| { |
| int i; |
| for(i=0; tags[i].id != CODEC_ID_NONE;i++) { |
| if(tag == tags[i].tag) |
| return tags[i].id; |
| } |
| for(i=0; tags[i].id != CODEC_ID_NONE; i++) { |
| if( toupper((tag >> 0)&0xFF) == toupper((tags[i].tag >> 0)&0xFF) |
| && toupper((tag >> 8)&0xFF) == toupper((tags[i].tag >> 8)&0xFF) |
| && toupper((tag >>16)&0xFF) == toupper((tags[i].tag >>16)&0xFF) |
| && toupper((tag >>24)&0xFF) == toupper((tags[i].tag >>24)&0xFF)) |
| return tags[i].id; |
| } |
| return CODEC_ID_NONE; |
| } |
| |
| unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id) |
| { |
| int i; |
| for(i=0; tags && tags[i]; i++){ |
| int tag= codec_get_tag(tags[i], id); |
| if(tag) return tag; |
| } |
| return 0; |
| } |
| |
| enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag) |
| { |
| int i; |
| for(i=0; tags && tags[i]; i++){ |
| enum CodecID id= codec_get_id(tags[i], tag); |
| if(id!=CODEC_ID_NONE) return id; |
| } |
| return CODEC_ID_NONE; |
| } |
| |
| static void compute_chapters_end(AVFormatContext *s) |
| { |
| unsigned int i; |
| |
| for (i=0; i+1<s->nb_chapters; i++) |
| if (s->chapters[i]->end == AV_NOPTS_VALUE) { |
| assert(s->chapters[i]->start <= s->chapters[i+1]->start); |
| assert(!av_cmp_q(s->chapters[i]->time_base, s->chapters[i+1]->time_base)); |
| s->chapters[i]->end = s->chapters[i+1]->start; |
| } |
| |
| if (s->nb_chapters && s->chapters[i]->end == AV_NOPTS_VALUE) { |
| assert(s->start_time != AV_NOPTS_VALUE); |
| assert(s->duration > 0); |
| s->chapters[i]->end = av_rescale_q(s->start_time + s->duration, |
| AV_TIME_BASE_Q, |
| s->chapters[i]->time_base); |
| } |
| } |
| |
| /* absolute maximum size we read until we abort */ |
| #define MAX_READ_SIZE 5000000 |
| |
| #define MAX_STD_TIMEBASES (60*12+5) |
| static int get_std_framerate(int i){ |
| if(i<60*12) return i*1001; |
| else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12; |
| } |
| |
| /* |
| * Is the time base unreliable. |
| * This is a heuristic to balance between quick acceptance of the values in |
| * the headers vs. some extra checks. |
| * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps. |
| * MPEG-2 commonly misuses field repeat flags to store different framerates. |
| * And there are "variable" fps files this needs to detect as well. |
| */ |
| static int tb_unreliable(AVCodecContext *c){ |
| if( c->time_base.den >= 101L*c->time_base.num |
| || c->time_base.den < 5L*c->time_base.num |
| /* || c->codec_tag == AV_RL32("DIVX") |
| || c->codec_tag == AV_RL32("XVID")*/ |
| || c->codec_id == CODEC_ID_MPEG2VIDEO |
| || c->codec_id == CODEC_ID_H264 |
| ) |
| return 1; |
| return 0; |
| } |
| |
| int av_find_stream_info(AVFormatContext *ic) |
| { |
| int i, count, ret, read_size, j; |
| AVStream *st; |
| AVPacket pkt1, *pkt; |
| int64_t last_dts[MAX_STREAMS]; |
| int64_t duration_gcd[MAX_STREAMS]={0}; |
| int duration_count[MAX_STREAMS]={0}; |
| double (*duration_error)[MAX_STD_TIMEBASES]; |
| int64_t old_offset = url_ftell(ic->pb); |
| int64_t codec_info_duration[MAX_STREAMS]={0}; |
| int codec_info_nb_frames[MAX_STREAMS]={0}; |
| |
| duration_error = av_mallocz(MAX_STREAMS * sizeof(*duration_error)); |
| if (!duration_error) return AVERROR(ENOMEM); |
| |
| for(i=0;i<ic->nb_streams;i++) { |
| st = ic->streams[i]; |
| if(st->codec->codec_type == CODEC_TYPE_VIDEO){ |
| /* if(!st->time_base.num) |
| st->time_base= */ |
| if(!st->codec->time_base.num) |
| st->codec->time_base= st->time_base; |
| } |
| //only for the split stuff |
| if (!st->parser) { |
| st->parser = av_parser_init(st->codec->codec_id); |
| if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){ |
| st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; |
| } |
| } |
| } |
| |
| for(i=0;i<MAX_STREAMS;i++){ |
| last_dts[i]= AV_NOPTS_VALUE; |
| } |
| |
| count = 0; |
| read_size = 0; |
| for(;;) { |
| if(url_interrupt_cb()){ |
| ret= AVERROR(EINTR); |
| break; |
| } |
| |
| /* check if one codec still needs to be handled */ |
| for(i=0;i<ic->nb_streams;i++) { |
| st = ic->streams[i]; |
| if (!has_codec_parameters(st->codec)) |
| break; |
| /* variable fps and no guess at the real fps */ |
| if( tb_unreliable(st->codec) |
| && duration_count[i]<20 && st->codec->codec_type == CODEC_TYPE_VIDEO) |
| break; |
| if(st->parser && st->parser->parser->split && !st->codec->extradata) |
| break; |
| if(st->first_dts == AV_NOPTS_VALUE) |
| break; |
| } |
| if (i == ic->nb_streams) { |
| /* NOTE: if the format has no header, then we need to read |
| some packets to get most of the streams, so we cannot |
| stop here */ |
| if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) { |
| /* if we found the info for all the codecs, we can stop */ |
| ret = count; |
| break; |
| } |
| } |
| /* we did not get all the codec info, but we read too much data */ |
| if (read_size >= MAX_READ_SIZE) { |
| ret = count; |
| break; |
| } |
| |
| /* NOTE: a new stream can be added there if no header in file |
| (AVFMTCTX_NOHEADER) */ |
| ret = av_read_frame_internal(ic, &pkt1); |
| if (ret < 0) { |
| /* EOF or error */ |
| ret = -1; /* we could not have all the codec parameters before EOF */ |
| for(i=0;i<ic->nb_streams;i++) { |
| st = ic->streams[i]; |
| if (!has_codec_parameters(st->codec)){ |
| char buf[256]; |
| avcodec_string(buf, sizeof(buf), st->codec, 0); |
| av_log(ic, AV_LOG_INFO, "Could not find codec parameters (%s)\n", buf); |
| } else { |
| ret = 0; |
| } |
| } |
| break; |
| } |
| |
| pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end); |
| if(av_dup_packet(pkt) < 0) { |
| av_free(duration_error); |
| return AVERROR(ENOMEM); |
| } |
| |
| read_size += pkt->size; |
| |
| st = ic->streams[pkt->stream_index]; |
| if(codec_info_nb_frames[st->index]>1) |
| codec_info_duration[st->index] += pkt->duration; |
| if (pkt->duration != 0) |
| codec_info_nb_frames[st->index]++; |
| |
| { |
| int index= pkt->stream_index; |
| int64_t last= last_dts[index]; |
| int64_t duration= pkt->dts - last; |
| |
| if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){ |
| double dur= duration * av_q2d(st->time_base); |
| |
| // if(st->codec->codec_type == CODEC_TYPE_VIDEO) |
| // av_log(NULL, AV_LOG_ERROR, "%f\n", dur); |
| if(duration_count[index] < 2) |
| memset(duration_error[index], 0, sizeof(*duration_error)); |
| for(i=1; i<MAX_STD_TIMEBASES; i++){ |
| int framerate= get_std_framerate(i); |
| int ticks= lrintf(dur*framerate/(1001*12)); |
| double error= dur - ticks*1001*12/(double)framerate; |
| duration_error[index][i] += error*error; |
| } |
| duration_count[index]++; |
| // ignore the first 4 values, they might have some random jitter |
| if (duration_count[index] > 3) |
| duration_gcd[index] = av_gcd(duration_gcd[index], duration); |
| } |
| if(last == AV_NOPTS_VALUE || duration_count[index]<=1) |
| last_dts[pkt->stream_index]= pkt->dts; |
| } |
| if(st->parser && st->parser->parser->split && !st->codec->extradata){ |
| int i= st->parser->parser->split(st->codec, pkt->data, pkt->size); |
| if(i){ |
| st->codec->extradata_size= i; |
| st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size); |
| memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
| } |
| } |
| |
| /* if still no information, we try to open the codec and to |
| decompress the frame. We try to avoid that in most cases as |
| it takes longer and uses more memory. For MPEG-4, we need to |
| decompress for QuickTime. */ |
| if (!has_codec_parameters(st->codec) /*&& |
| (st->codec->codec_id == CODEC_ID_FLV1 || |
| st->codec->codec_id == CODEC_ID_H264 || |
| st->codec->codec_id == CODEC_ID_H263 || |
| st->codec->codec_id == CODEC_ID_H261 || |
| st->codec->codec_id == CODEC_ID_VORBIS || |
| st->codec->codec_id == CODEC_ID_MJPEG || |
| st->codec->codec_id == CODEC_ID_PNG || |
| st->codec->codec_id == CODEC_ID_PAM || |
| st->codec->codec_id == CODEC_ID_PGM || |
| st->codec->codec_id == CODEC_ID_PGMYUV || |
| st->codec->codec_id == CODEC_ID_PBM || |
| st->codec->codec_id == CODEC_ID_PPM || |
| st->codec->codec_id == CODEC_ID_SHORTEN || |
| (st->codec->codec_id == CODEC_ID_MPEG4 && !st->need_parsing))*/) |
| try_decode_frame(st, pkt->data, pkt->size); |
| |
| if (st->time_base.den > 0 && av_rescale_q(codec_info_duration[st->index], st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) { |
| break; |
| } |
| count++; |
| } |
| |
| // close codecs which were opened in try_decode_frame() |
| for(i=0;i<ic->nb_streams;i++) { |
| st = ic->streams[i]; |
| if(st->codec->codec) |
| avcodec_close(st->codec); |
| } |
| for(i=0;i<ic->nb_streams;i++) { |
| st = ic->streams[i]; |
| if (st->codec->codec_type == CODEC_TYPE_VIDEO) { |
| if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample) |
| st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt); |
| |
| // the check for tb_unreliable() is not completely correct, since this is not about handling |
| // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g. |
| // ipmovie.c produces. |
| if (tb_unreliable(st->codec) && duration_count[i] > 15 && duration_gcd[i] > 1) |
| av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, st->time_base.den, st->time_base.num * duration_gcd[i], INT_MAX); |
| if(duration_count[i] |
| && tb_unreliable(st->codec) /*&& |
| //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ... |
| st->time_base.num*duration_sum[i]/duration_count[i]*101LL > st->time_base.den*/){ |
| int num = 0; |
| double best_error= 2*av_q2d(st->time_base); |
| best_error= best_error*best_error*duration_count[i]*1000*12*30; |
| |
| for(j=1; j<MAX_STD_TIMEBASES; j++){ |
| double error= duration_error[i][j] * get_std_framerate(j); |
| // if(st->codec->codec_type == CODEC_TYPE_VIDEO) |
| // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error); |
| if(error < best_error){ |
| best_error= error; |
| num = get_std_framerate(j); |
| } |
| } |
| // do not increase frame rate by more than 1 % in order to match a standard rate. |
| if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate))) |
| av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX); |
| } |
| |
| if (!st->r_frame_rate.num){ |
| if( st->codec->time_base.den * (int64_t)st->time_base.num |
| <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){ |
| st->r_frame_rate.num = st->codec->time_base.den; |
| st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame; |
| }else{ |
| st->r_frame_rate.num = st->time_base.den; |
| st->r_frame_rate.den = st->time_base.num; |
| } |
| } |
| }else if(st->codec->codec_type == CODEC_TYPE_AUDIO) { |
| if(!st->codec->bits_per_coded_sample) |
| st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id); |
| } |
| } |
| |
| av_estimate_timings(ic, old_offset); |
| |
| compute_chapters_end(ic); |
| |
| #if 0 |
| /* correct DTS for B-frame streams with no timestamps */ |
| for(i=0;i<ic->nb_streams;i++) { |
| st = ic->streams[i]; |
| if (st->codec->codec_type == CODEC_TYPE_VIDEO) { |
| if(b-frames){ |
| ppktl = &ic->packet_buffer; |
| while(ppkt1){ |
| if(ppkt1->stream_index != i) |
| continue; |
| if(ppkt1->pkt->dts < 0) |
| break; |
| if(ppkt1->pkt->pts != AV_NOPTS_VALUE) |
| break; |
| ppkt1->pkt->dts -= delta; |
| ppkt1= ppkt1->next; |
| } |
| if(ppkt1) |
| continue; |
| st->cur_dts -= delta; |
| } |
| } |
| } |
| #endif |
| |
| av_free(duration_error); |
| |
| return ret; |
| } |
| |
| /*******************************************************/ |
| |
| int av_read_play(AVFormatContext *s) |
| { |
| if (s->iformat->read_play) |
| return s->iformat->read_play(s); |
| if (s->pb) |
| return av_url_read_fpause(s->pb, 0); |
| return AVERROR(ENOSYS); |
| } |
| |
| int av_read_pause(AVFormatContext *s) |
| { |
| if (s->iformat->read_pause) |
| return s->iformat->read_pause(s); |
| if (s->pb) |
| return av_url_read_fpause(s->pb, 1); |
| return AVERROR(ENOSYS); |
| } |
| |
| void av_close_input_stream(AVFormatContext *s) |
| { |
| int i; |
| AVStream *st; |
| |
| if (s->iformat->read_close) |
| s->iformat->read_close(s); |
| for(i=0;i<s->nb_streams;i++) { |
| /* free all data in a stream component */ |
| st = s->streams[i]; |
| if (st->parser) { |
| av_parser_close(st->parser); |
| av_free_packet(&st->cur_pkt); |
| } |
| av_metadata_free(&st->metadata); |
| av_free(st->index_entries); |
| av_free(st->codec->extradata); |
| av_free(st->codec); |
| #if LIBAVFORMAT_VERSION_INT < (53<<16) |
| av_free(st->filename); |
| #endif |
| av_free(st->priv_data); |
| av_free(st); |
| } |
| for(i=s->nb_programs-1; i>=0; i--) { |
| #if LIBAVFORMAT_VERSION_INT < (53<<16) |
| av_freep(&s->programs[i]->provider_name); |
| av_freep(&s->programs[i]->name); |
| #endif |
| av_metadata_free(&s->programs[i]->metadata); |
| av_freep(&s->programs[i]->stream_index); |
| av_freep(&s->programs[i]); |
| } |
| av_freep(&s->programs); |
| flush_packet_queue(s); |
| av_freep(&s->priv_data); |
| while(s->nb_chapters--) { |
| #if LIBAVFORMAT_VERSION_INT < (53<<16) |
| av_free(s->chapters[s->nb_chapters]->title); |
| #endif |
| av_metadata_free(&s->chapters[s->nb_chapters]->metadata); |
| av_free(s->chapters[s->nb_chapters]); |
| } |
| av_freep(&s->chapters); |
| av_metadata_free(&s->metadata); |
| av_free(s); |
| } |
| |
| void av_close_input_file(AVFormatContext *s) |
| { |
| ByteIOContext *pb = s->iformat->flags & AVFMT_NOFILE ? NULL : s->pb; |
| av_close_input_stream(s); |
| if (pb) |
| url_fclose(pb); |
| } |
| |
| AVStream *av_new_stream(AVFormatContext *s, int id) |
| { |
| AVStream *st; |
| int i; |
| |
| if (s->nb_streams >= MAX_STREAMS) |
| return NULL; |
| |
| st = av_mallocz(sizeof(AVStream)); |
| if (!st) |
| return NULL; |
| |
| st->codec= avcodec_alloc_context(); |
| if (s->iformat) { |
| /* no default bitrate if decoding */ |
| st->codec->bit_rate = 0; |
| } |
| st->index = s->nb_streams; |
| st->id = id; |
| st->start_time = AV_NOPTS_VALUE; |
| st->duration = AV_NOPTS_VALUE; |
| /* we set the current DTS to 0 so that formats without any timestamps |
| but durations get some timestamps, formats with some unknown |
| timestamps have their first few packets buffered and the |
| timestamps corrected before they are returned to the user */ |
| st->cur_dts = 0; |
| st->first_dts = AV_NOPTS_VALUE; |
| |
| /* default pts setting is MPEG-like */ |
| av_set_pts_info(st, 33, 1, 90000); |
| st->last_IP_pts = AV_NOPTS_VALUE; |
| for(i=0; i<MAX_REORDER_DELAY+1; i++) |
| st->pts_buffer[i]= AV_NOPTS_VALUE; |
| st->reference_dts = AV_NOPTS_VALUE; |
| |
| st->sample_aspect_ratio = (AVRational){0,1}; |
| |
| s->streams[s->nb_streams++] = st; |
| return st; |
| } |
| |
| AVProgram *av_new_program(AVFormatContext *ac, int id) |
| { |
| AVProgram *program=NULL; |
| int i; |
| |
| #ifdef DEBUG_SI |
| av_log(ac, AV_LOG_DEBUG, "new_program: id=0x%04x\n", id); |
| #endif |
| |
| for(i=0; i<ac->nb_programs; i++) |
| if(ac->programs[i]->id == id) |
| program = ac->programs[i]; |
| |
| if(!program){ |
| program = av_mallocz(sizeof(AVProgram)); |
| if (!program) |
| return NULL; |
| dynarray_add(&ac->programs, &ac->nb_programs, program); |
| program->discard = AVDISCARD_NONE; |
| } |
| program->id = id; |
| |
| return program; |
| } |
| |
| AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title) |
| { |
| AVChapter *chapter = NULL; |
| int i; |
| |
| for(i=0; i<s->nb_chapters; i++) |
| if(s->chapters[i]->id == id) |
| chapter = s->chapters[i]; |
| |
| if(!chapter){ |
| chapter= av_mallocz(sizeof(AVChapter)); |
| if(!chapter) |
| return NULL; |
| dynarray_add(&s->chapters, &s->nb_chapters, chapter); |
| } |
| #if LIBAVFORMAT_VERSION_INT < (53<<16) |
| av_free(chapter->title); |
| #endif |
| av_metadata_set(&chapter->metadata, "title", title); |
| chapter->id = id; |
| chapter->time_base= time_base; |
| chapter->start = start; |
| chapter->end = end; |
| |
| return chapter; |
| } |
| |
| /************************************************************/ |
| /* output media file */ |
| |
| int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap) |
| { |
| int ret; |
| |
| if (s->oformat->priv_data_size > 0) { |
| s->priv_data = av_mallocz(s->oformat->priv_data_size); |
| if (!s->priv_data) |
| return AVERROR(ENOMEM); |
| } else |
| s->priv_data = NULL; |
| |
| if (s->oformat->set_parameters) { |
| ret = s->oformat->set_parameters(s, ap); |
| if (ret < 0) |
| return ret; |
| } |
| return 0; |
| } |
| |
| int av_write_header(AVFormatContext *s) |
| { |
| int ret, i; |
| AVStream *st; |
| |
| // some sanity checks |
| for(i=0;i<s->nb_streams;i++) { |
| st = s->streams[i]; |
| |
| switch (st->codec->codec_type) { |
| case CODEC_TYPE_AUDIO: |
| if(st->codec->sample_rate<=0){ |
| av_log(s, AV_LOG_ERROR, "sample rate not set\n"); |
| return -1; |
| } |
| if(!st->codec->block_align) |
| st->codec->block_align = st->codec->channels * |
| av_get_bits_per_sample(st->codec->codec_id) >> 3; |
| break; |
| case CODEC_TYPE_VIDEO: |
| if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too? |
| av_log(s, AV_LOG_ERROR, "time base not set\n"); |
| return -1; |
| } |
| if(st->codec->width<=0 || st->codec->height<=0){ |
| av_log(s, AV_LOG_ERROR, "dimensions not set\n"); |
| return -1; |
| } |
| if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){ |
| av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n"); |
| return -1; |
| } |
| break; |
| } |
| |
| if(s->oformat->codec_tag){ |
| if(st->codec->codec_tag){ |
| //FIXME |
| //check that tag + id is in the table |
| //if neither is in the table -> OK |
| //if tag is in the table with another id -> FAIL |
| //if id is in the table with another tag -> FAIL unless strict < ? |
| }else |
| st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id); |
| } |
| |
| if(s->oformat->flags & AVFMT_GLOBALHEADER && |
| !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER)) |
| av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i); |
| } |
| |
| if (!s->priv_data && s->oformat->priv_data_size > 0) { |
| s->priv_data = av_mallocz(s->oformat->priv_data_size); |
| if (!s->priv_data) |
| return AVERROR(ENOMEM); |
| } |
| |
| #if LIBAVFORMAT_VERSION_MAJOR < 53 |
| ff_metadata_mux_compat(s); |
| #endif |
| |
| if(s->oformat->write_header){ |
| ret = s->oformat->write_header(s); |
| if (ret < 0) |
| return ret; |
| } |
| |
| /* init PTS generation */ |
| for(i=0;i<s->nb_streams;i++) { |
| int64_t den = AV_NOPTS_VALUE; |
| st = s->streams[i]; |
| |
| switch (st->codec->codec_type) { |
| case CODEC_TYPE_AUDIO: |
| den = (int64_t)st->time_base.num * st->codec->sample_rate; |
| break; |
| case CODEC_TYPE_VIDEO: |
| den = (int64_t)st->time_base.num * st->codec->time_base.den; |
| break; |
| default: |
| break; |
| } |
| if (den != AV_NOPTS_VALUE) { |
| if (den <= 0) |
| return AVERROR_INVALIDDATA; |
| av_frac_init(&st->pts, 0, 0, den); |
| } |
| } |
| return 0; |
| } |
| |
| //FIXME merge with compute_pkt_fields |
| static int compute_pkt_fields2(AVStream *st, AVPacket *pkt){ |
| int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames); |
| int num, den, frame_size, i; |
| |
| // av_log(st->codec, AV_LOG_DEBUG, "av_write_frame: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n", pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index); |
| |
| /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE) |
| return -1;*/ |
| |
| /* duration field */ |
| if (pkt->duration == 0) { |
| compute_frame_duration(&num, &den, st, NULL, pkt); |
| if (den && num) { |
| pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num); |
| } |
| } |
| |
| if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0) |
| pkt->pts= pkt->dts; |
| |
| //XXX/FIXME this is a temporary hack until all encoders output pts |
| if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){ |
| pkt->dts= |
| // pkt->pts= st->cur_dts; |
| pkt->pts= st->pts.val; |
| } |
| |
| //calculate dts from pts |
| if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){ |
| st->pts_buffer[0]= pkt->pts; |
| for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++) |
| st->pts_buffer[i]= (i-delay-1) * pkt->duration; |
| for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++) |
| FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]); |
| |
| pkt->dts= st->pts_buffer[0]; |
| } |
| |
| if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){ |
| av_log(st->codec, AV_LOG_ERROR, "error, non monotone timestamps %"PRId64" >= %"PRId64"\n", st->cur_dts, pkt->dts); |
| return -1; |
| } |
| if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){ |
| av_log(st->codec, AV_LOG_ERROR, "error, pts < dts\n"); |
| return -1; |
| } |
| |
| // av_log(NULL, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts); |
| st->cur_dts= pkt->dts; |
| st->pts.val= pkt->dts; |
| |
| /* update pts */ |
| switch (st->codec->codec_type) { |
| case CODEC_TYPE_AUDIO: |
| frame_size = get_audio_frame_size(st->codec, pkt->size); |
| |
| /* HACK/FIXME, we skip the initial 0 size packets as they are most |
| likely equal to the encoder delay, but it would be better if we |
| had the real timestamps from the encoder */ |
| if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) { |
| av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size); |
| } |
| break; |
| case CODEC_TYPE_VIDEO: |
| av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num); |
| break; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| int av_write_frame(AVFormatContext *s, AVPacket *pkt) |
| { |
| int ret = compute_pkt_fields2(s->streams[pkt->stream_index], pkt); |
| |
| if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) |
| return ret; |
| |
| ret= s->oformat->write_packet(s, pkt); |
| if(!ret) |
| ret= url_ferror(s->pb); |
| return ret; |
| } |
| |
| void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, |
| int (*compare)(AVFormatContext *, AVPacket *, AVPacket *)) |
| { |
| AVPacketList **next_point, *this_pktl; |
| |
| this_pktl = av_mallocz(sizeof(AVPacketList)); |
| this_pktl->pkt= *pkt; |
| if(pkt->destruct == av_destruct_packet) |
| pkt->destruct= NULL; // not shared -> must keep original from being freed |
| else |
| av_dup_packet(&this_pktl->pkt); //shared -> must dup |
| |
| next_point = &s->packet_buffer; |
| while(*next_point){ |
| if(compare(s, &(*next_point)->pkt, pkt)) |
| break; |
| next_point= &(*next_point)->next; |
| } |
| this_pktl->next= *next_point; |
| *next_point= this_pktl; |
| } |
| |
| int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt) |
| { |
| AVStream *st = s->streams[ pkt ->stream_index]; |
| AVStream *st2= s->streams[ next->stream_index]; |
| int64_t left = st2->time_base.num * (int64_t)st ->time_base.den; |
| int64_t right= st ->time_base.num * (int64_t)st2->time_base.den; |
| |
| if (pkt->dts == AV_NOPTS_VALUE) |
| return 0; |
| |
| return next->dts * left > pkt->dts * right; //FIXME this can overflow |
| } |
| |
| int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){ |
| AVPacketList *pktl; |
| int stream_count=0; |
| int streams[MAX_STREAMS]; |
| |
| if(pkt){ |
| ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts); |
| } |
| |
| memset(streams, 0, sizeof(streams)); |
| pktl= s->packet_buffer; |
| while(pktl){ |
| //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%"PRId64"\n", pktl->pkt.stream_index, pktl->pkt.dts); |
| if(streams[ pktl->pkt.stream_index ] == 0) |
| stream_count++; |
| streams[ pktl->pkt.stream_index ]++; |
| pktl= pktl->next; |
| } |
| |
| if(stream_count && (s->nb_streams == stream_count || flush)){ |
| pktl= s->packet_buffer; |
| *out= pktl->pkt; |
| |
| s->packet_buffer= pktl->next; |
| av_freep(&pktl); |
| return 1; |
| }else{ |
| av_init_packet(out); |
| return 0; |
| } |
| } |
| |
| /** |
| * Interleaves an AVPacket correctly so it can be muxed. |
| * @param out the interleaved packet will be output here |
| * @param in the input packet |
| * @param flush 1 if no further packets are available as input and all |
| * remaining packets should be output |
| * @return 1 if a packet was output, 0 if no packet could be output, |
| * < 0 if an error occurred |
| */ |
| static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){ |
| if(s->oformat->interleave_packet) |
| return s->oformat->interleave_packet(s, out, in, flush); |
| else |
| return av_interleave_packet_per_dts(s, out, in, flush); |
| } |
| |
| int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){ |
| AVStream *st= s->streams[ pkt->stream_index]; |
| |
| //FIXME/XXX/HACK drop zero sized packets |
| if(st->codec->codec_type == CODEC_TYPE_AUDIO && pkt->size==0) |
| return 0; |
| |
| //av_log(NULL, AV_LOG_DEBUG, "av_interleaved_write_frame %d %"PRId64" %"PRId64"\n", pkt->size, pkt->dts, pkt->pts); |
| if(compute_pkt_fields2(st, pkt) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) |
| return -1; |
| |
| if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) |
| return -1; |
| |
| for(;;){ |
| AVPacket opkt; |
| int ret= av_interleave_packet(s, &opkt, pkt, 0); |
| if(ret<=0) //FIXME cleanup needed for ret<0 ? |
| return ret; |
| |
| ret= s->oformat->write_packet(s, &opkt); |
| |
| av_free_packet(&opkt); |
| pkt= NULL; |
| |
| if(ret<0) |
| return ret; |
| if(url_ferror(s->pb)) |
| return url_ferror(s->pb); |
| } |
| } |
| |
| int av_write_trailer(AVFormatContext *s) |
| { |
| int ret, i; |
| |
| for(;;){ |
| AVPacket pkt; |
| ret= av_interleave_packet(s, &pkt, NULL, 1); |
| if(ret<0) //FIXME cleanup needed for ret<0 ? |
| goto fail; |
| if(!ret) |
| break; |
| |
| ret= s->oformat->write_packet(s, &pkt); |
| |
| av_free_packet(&pkt); |
| |
| if(ret<0) |
| goto fail; |
| if(url_ferror(s->pb)) |
| goto fail; |
| } |
| |
| if(s->oformat->write_trailer) |
| ret = s->oformat->write_trailer(s); |
| fail: |
| if(ret == 0) |
| ret=url_ferror(s->pb); |
| for(i=0;i<s->nb_streams;i++) |
| av_freep(&s->streams[i]->priv_data); |
| av_freep(&s->priv_data); |
| return ret; |
| } |
| |
| void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx) |
| { |
| int i, j; |
| AVProgram *program=NULL; |
| void *tmp; |
| |
| for(i=0; i<ac->nb_programs; i++){ |
| if(ac->programs[i]->id != progid) |
| continue; |
| program = ac->programs[i]; |
| for(j=0; j<program->nb_stream_indexes; j++) |
| if(program->stream_index[j] == idx) |
| return; |
| |
| tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1)); |
| if(!tmp) |
| return; |
| program->stream_index = tmp; |
| program->stream_index[program->nb_stream_indexes++] = idx; |
| return; |
| } |
| } |
| |
| static void print_fps(double d, const char *postfix){ |
| uint64_t v= lrintf(d*100); |
| if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix); |
| else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix); |
| else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix); |
| } |
| |
| /* "user interface" functions */ |
| static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output) |
| { |
| char buf[256]; |
| int flags = (is_output ? ic->oformat->flags : ic->iformat->flags); |
| AVStream *st = ic->streams[i]; |
| int g = av_gcd(st->time_base.num, st->time_base.den); |
| AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL, 0); |
| avcodec_string(buf, sizeof(buf), st->codec, is_output); |
| av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i); |
| /* the pid is an important information, so we display it */ |
| /* XXX: add a generic system */ |
| if (flags & AVFMT_SHOW_IDS) |
| av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id); |
| if (lang) |
| av_log(NULL, AV_LOG_INFO, "(%s)", lang->value); |
| av_log(NULL, AV_LOG_DEBUG, ", %d/%d", st->time_base.num/g, st->time_base.den/g); |
| av_log(NULL, AV_LOG_INFO, ": %s", buf); |
| if (st->sample_aspect_ratio.num && // default |
| av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) { |
| AVRational display_aspect_ratio; |
| av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den, |
| st->codec->width*st->sample_aspect_ratio.num, |
| st->codec->height*st->sample_aspect_ratio.den, |
| 1024*1024); |
| av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d", |
| st->sample_aspect_ratio.num, st->sample_aspect_ratio.den, |
| display_aspect_ratio.num, display_aspect_ratio.den); |
| } |
| if(st->codec->codec_type == CODEC_TYPE_VIDEO){ |
| if(st->r_frame_rate.den && st->r_frame_rate.num) |
| print_fps(av_q2d(st->r_frame_rate), "tbr"); |
| if(st->time_base.den && st->time_base.num) |
| print_fps(1/av_q2d(st->time_base), "tbn"); |
| if(st->codec->time_base.den && st->codec->time_base.num) |
| print_fps(1/av_q2d(st->codec->time_base), "tbc"); |
| } |
| av_log(NULL, AV_LOG_INFO, "\n"); |
| } |
| |
| void dump_format(AVFormatContext *ic, |
| int index, |
| const char *url, |
| int is_output) |
| { |
| int i; |
| |
| av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n", |
| is_output ? "Output" : "Input", |
| index, |
| is_output ? ic->oformat->name : ic->iformat->name, |
| is_output ? "to" : "from", url); |
| if (!is_output) { |
| av_log(NULL, AV_LOG_INFO, " Duration: "); |
| if (ic->duration != AV_NOPTS_VALUE) { |
| int hours, mins, secs, us; |
| secs = ic->duration / AV_TIME_BASE; |
| us = ic->duration % AV_TIME_BASE; |
| mins = secs / 60; |
| secs %= 60; |
| hours = mins / 60; |
| mins %= 60; |
| av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs, |
| (100 * us) / AV_TIME_BASE); |
| } else { |
| av_log(NULL, AV_LOG_INFO, "N/A"); |
| } |
| if (ic->start_time != AV_NOPTS_VALUE) { |
| int secs, us; |
| av_log(NULL, AV_LOG_INFO, ", start: "); |
| secs = ic->start_time / AV_TIME_BASE; |
| us = ic->start_time % AV_TIME_BASE; |
| av_log(NULL, AV_LOG_INFO, "%d.%06d", |
| secs, (int)av_rescale(us, 1000000, AV_TIME_BASE)); |
| } |
| av_log(NULL, AV_LOG_INFO, ", bitrate: "); |
| if (ic->bit_rate) { |
| av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000); |
| } else { |
| av_log(NULL, AV_LOG_INFO, "N/A"); |
| } |
| av_log(NULL, AV_LOG_INFO, "\n"); |
| } |
| if(ic->nb_programs) { |
| int j, k; |
| for(j=0; j<ic->nb_programs; j++) { |
| AVMetadataTag *name = av_metadata_get(ic->programs[j]->metadata, |
| "name", NULL, 0); |
| av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id, |
| name ? name->value : ""); |
| for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) |
| dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output); |
| } |
| } else |
| for(i=0;i<ic->nb_streams;i++) |
| dump_stream_format(ic, i, index, is_output); |
| } |
| |
| #if LIBAVFORMAT_VERSION_MAJOR < 53 |
| int parse_image_size(int *width_ptr, int *height_ptr, const char *str) |
| { |
| return av_parse_video_frame_size(width_ptr, height_ptr, str); |
| } |
| |
| int parse_frame_rate(int *frame_rate_num, int *frame_rate_den, const char *arg) |
| { |
| AVRational frame_rate; |
| int ret = av_parse_video_frame_rate(&frame_rate, arg); |
| *frame_rate_num= frame_rate.num; |
| *frame_rate_den= frame_rate.den; |
| return ret; |
| } |
| #endif |
| |
| int64_t av_gettime(void) |
| { |
| struct timeval tv; |
| gettimeofday(&tv,NULL); |
| return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec; |
| } |
| |
| int64_t parse_date(const char *datestr, int duration) |
| { |
| const char *p; |
| int64_t t; |
| struct tm dt; |
| int i; |
| static const char * const date_fmt[] = { |
| "%Y-%m-%d", |
| "%Y%m%d", |
| }; |
| static const char * const time_fmt[] = { |
| "%H:%M:%S", |
| "%H%M%S", |
| }; |
| const char *q; |
| int is_utc, len; |
| char lastch; |
| int negative = 0; |
| |
| #undef time |
| time_t now = time(0); |
| |
| len = strlen(datestr); |
| if (len > 0) |
| lastch = datestr[len - 1]; |
| else |
| lastch = '\0'; |
| is_utc = (lastch == 'z' || lastch == 'Z'); |
| |
| memset(&dt, 0, sizeof(dt)); |
| |
| p = datestr; |
| q = NULL; |
| if (!duration) { |
| if (!strncasecmp(datestr, "now", len)) |
| return (int64_t) now * 1000000; |
| |
| /* parse the year-month-day part */ |
| for (i = 0; i < FF_ARRAY_ELEMS(date_fmt); i++) { |
| q = small_strptime(p, date_fmt[i], &dt); |
| if (q) { |
| break; |
| } |
| } |
| |
| /* if the year-month-day part is missing, then take the |
| * current year-month-day time */ |
| if (!q) { |
| if (is_utc) { |
| dt = *gmtime(&now); |
| } else { |
| dt = *localtime(&now); |
| } |
| dt.tm_hour = dt.tm_min = dt.tm_sec = 0; |
| } else { |
| p = q; |
| } |
| |
| if (*p == 'T' || *p == 't' || *p == ' ') |
| p++; |
| |
| /* parse the hour-minute-second part */ |
| for (i = 0; i < FF_ARRAY_ELEMS(time_fmt); i++) { |
| q = small_strptime(p, time_fmt[i], &dt); |
| if (q) { |
| break; |
| } |
| } |
| } else { |
| /* parse datestr as a duration */ |
| if (p[0] == '-') { |
| negative = 1; |
| ++p; |
| } |
| /* parse datestr as HH:MM:SS */ |
| q = small_strptime(p, time_fmt[0], &dt); |
| if (!q) { |
| /* parse datestr as S+ */ |
| dt.tm_sec = strtol(p, (char **)&q, 10); |
| if (q == p) |
| /* the parsing didn't succeed */ |
| return INT64_MIN; |
| dt.tm_min = 0; |
| dt.tm_hour = 0; |
| } |
| } |
| |
| /* Now we have all the fields that we can get */ |
| if (!q) { |
| return INT64_MIN; |
| } |
| |
| if (duration) { |
| t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec; |
| } else { |
| dt.tm_isdst = -1; /* unknown */ |
| if (is_utc) { |
| t = mktimegm(&dt); |
| } else { |
| t = mktime(&dt); |
| } |
| } |
| |
| t *= 1000000; |
| |
| /* parse the .m... part */ |
| if (*q == '.') { |
| int val, n; |
| q++; |
| for (val = 0, n = 100000; n >= 1; n /= 10, q++) { |
| if (!isdigit(*q)) |
| break; |
| val += n * (*q - '0'); |
| } |
| t += val; |
| } |
| return negative ? -t : t; |
| } |
| |
| int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info) |
| { |
| const char *p; |
| char tag[128], *q; |
| |
| p = info; |
| if (*p == '?') |
| p++; |
| for(;;) { |
| q = tag; |
| while (*p != '\0' && *p != '=' && *p != '&') { |
| if ((q - tag) < sizeof(tag) - 1) |
| *q++ = *p; |
| p++; |
| } |
| *q = '\0'; |
| q = arg; |
| if (*p == '=') { |
| p++; |
| while (*p != '&' && *p != '\0') { |
| if ((q - arg) < arg_size - 1) { |
| if (*p == '+') |
| *q++ = ' '; |
| else |
| *q++ = *p; |
| } |
| p++; |
| } |
| *q = '\0'; |
| } |
| if (!strcmp(tag, tag1)) |
| return 1; |
| if (*p != '&') |
| break; |
| p++; |
| } |
| return 0; |
| } |
| |
| int av_get_frame_filename(char *buf, int buf_size, |
| const char *path, int number) |
| { |
| const char *p; |
| char *q, buf1[20], c; |
| int nd, len, percentd_found; |
| |
| q = buf; |
| p = path; |
| percentd_found = 0; |
| for(;;) { |
| c = *p++; |
| if (c == '\0') |
| break; |
| if (c == '%') { |
| do { |
| nd = 0; |
| while (isdigit(*p)) { |
| nd = nd * 10 + *p++ - '0'; |
| } |
| c = *p++; |
| } while (isdigit(c)); |
| |
| switch(c) { |
| case '%': |
| goto addchar; |
| case 'd': |
| if (percentd_found) |
| goto fail; |
| percentd_found = 1; |
| snprintf(buf1, sizeof(buf1), "%0*d", nd, number); |
| len = strlen(buf1); |
| if ((q - buf + len) > buf_size - 1) |
| goto fail; |
| memcpy(q, buf1, len); |
| q += len; |
| break; |
| default: |
| goto fail; |
| } |
| } else { |
| addchar: |
| if ((q - buf) < buf_size - 1) |
| *q++ = c; |
| } |
| } |
| if (!percentd_found) |
| goto fail; |
| *q = '\0'; |
| return 0; |
| fail: |
| *q = '\0'; |
| return -1; |
| } |
| |
| static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size) |
| { |
| int len, i, j, c; |
| #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0) |
| |
| for(i=0;i<size;i+=16) { |
| len = size - i; |
| if (len > 16) |
| len = 16; |
| PRINT("%08x ", i); |
| for(j=0;j<16;j++) { |
| if (j < len) |
| PRINT(" %02x", buf[i+j]); |
| else |
| PRINT(" "); |
| } |
| PRINT(" "); |
| for(j=0;j<len;j++) { |
| c = buf[i+j]; |
| if (c < ' ' || c > '~') |
| c = '.'; |
| PRINT("%c", c); |
| } |
| PRINT("\n"); |
| } |
| #undef PRINT |
| } |
| |
| void av_hex_dump(FILE *f, uint8_t *buf, int size) |
| { |
| hex_dump_internal(NULL, f, 0, buf, size); |
| } |
| |
| void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size) |
| { |
| hex_dump_internal(avcl, NULL, level, buf, size); |
| } |
| |
| //FIXME needs to know the time_base |
| static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload) |
| { |
| #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0) |
| PRINT("stream #%d:\n", pkt->stream_index); |
| PRINT(" keyframe=%d\n", ((pkt->flags & PKT_FLAG_KEY) != 0)); |
| PRINT(" duration=%0.3f\n", (double)pkt->duration / AV_TIME_BASE); |
| /* DTS is _always_ valid after av_read_frame() */ |
| PRINT(" dts="); |
| if (pkt->dts == AV_NOPTS_VALUE) |
| PRINT("N/A"); |
| else |
| PRINT("%0.3f", (double)pkt->dts / AV_TIME_BASE); |
| /* PTS may not be known if B-frames are present. */ |
| PRINT(" pts="); |
| if (pkt->pts == AV_NOPTS_VALUE) |
| PRINT("N/A"); |
| else |
| PRINT("%0.3f", (double)pkt->pts / AV_TIME_BASE); |
| PRINT("\n"); |
| PRINT(" size=%d\n", pkt->size); |
| #undef PRINT |
| if (dump_payload) |
| av_hex_dump(f, pkt->data, pkt->size); |
| } |
| |
| void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload) |
| { |
| pkt_dump_internal(NULL, f, 0, pkt, dump_payload); |
| } |
| |
| void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload) |
| { |
| pkt_dump_internal(avcl, NULL, level, pkt, dump_payload); |
| } |
| |
| void url_split(char *proto, int proto_size, |
| char *authorization, int authorization_size, |
| char *hostname, int hostname_size, |
| int *port_ptr, |
| char *path, int path_size, |
| const char *url) |
| { |
| const char *p, *ls, *at, *col, *brk; |
| |
| if (port_ptr) *port_ptr = -1; |
| if (proto_size > 0) proto[0] = 0; |
| if (authorization_size > 0) authorization[0] = 0; |
| if (hostname_size > 0) hostname[0] = 0; |
| if (path_size > 0) path[0] = 0; |
| |
| /* parse protocol */ |
| if ((p = strchr(url, ':'))) { |
| av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url)); |
| p++; /* skip ':' */ |
| if (*p == '/') p++; |
| if (*p == '/') p++; |
| } else { |
| /* no protocol means plain filename */ |
| av_strlcpy(path, url, path_size); |
| return; |
| } |
| |
| /* separate path from hostname */ |
| ls = strchr(p, '/'); |
| if(!ls) |
| ls = strchr(p, '?'); |
| if(ls) |
| av_strlcpy(path, ls, path_size); |
| else |
| ls = &p[strlen(p)]; // XXX |
| |
| /* the rest is hostname, use that to parse auth/port */ |
| if (ls != p) { |
| /* authorization (user[:pass]@hostname) */ |
| if ((at = strchr(p, '@')) && at < ls) { |
| av_strlcpy(authorization, p, |
| FFMIN(authorization_size, at + 1 - p)); |
| p = at + 1; /* skip '@' */ |
| } |
| |
| if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) { |
| /* [host]:port */ |
| av_strlcpy(hostname, p + 1, |
| FFMIN(hostname_size, brk - p)); |
| if (brk[1] == ':' && port_ptr) |
| *port_ptr = atoi(brk + 2); |
| } else if ((col = strchr(p, ':')) && col < ls) { |
| av_strlcpy(hostname, p, |
| FFMIN(col + 1 - p, hostname_size)); |
| if (port_ptr) *port_ptr = atoi(col + 1); |
| } else |
| av_strlcpy(hostname, p, |
| FFMIN(ls + 1 - p, hostname_size)); |
| } |
| } |
| |
| char *ff_data_to_hex(char *buff, const uint8_t *src, int s) |
| { |
| int i; |
| static const char hex_table[16] = { '0', '1', '2', '3', |
| '4', '5', '6', '7', |
| '8', '9', 'A', 'B', |
| 'C', 'D', 'E', 'F' }; |
| |
| for(i = 0; i < s; i++) { |
| buff[i * 2] = hex_table[src[i] >> 4]; |
| buff[i * 2 + 1] = hex_table[src[i] & 0xF]; |
| } |
| |
| return buff; |
| } |
| |
| void av_set_pts_info(AVStream *s, int pts_wrap_bits, |
| unsigned int pts_num, unsigned int pts_den) |
| { |
| unsigned int gcd= av_gcd(pts_num, pts_den); |
| s->pts_wrap_bits = pts_wrap_bits; |
| s->time_base.num = pts_num/gcd; |
| s->time_base.den = pts_den/gcd; |
| |
| if(gcd>1) |
| av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, gcd); |
| } |