| /* |
| * ASF compatible demuxer |
| * Copyright (c) 2000, 2001 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 "libavutil/common.h" |
| #include "libavcodec/mpegaudio.h" |
| #include "avformat.h" |
| #include "riff.h" |
| #include "asf.h" |
| #include "asfcrypt.h" |
| |
| void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format); |
| |
| #undef NDEBUG |
| #include <assert.h> |
| |
| #define FRAME_HEADER_SIZE 17 |
| // Fix Me! FRAME_HEADER_SIZE may be different. |
| |
| static const GUID index_guid = { |
| 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb |
| }; |
| |
| static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */ |
| 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2 |
| }; |
| /**********************************/ |
| /* decoding */ |
| |
| //#define DEBUG |
| |
| #ifdef DEBUG |
| #define PRINT_IF_GUID(g,cmp) \ |
| if (!memcmp(g, &cmp, sizeof(GUID))) \ |
| dprintf(NULL, "(GUID: %s) ", #cmp) |
| |
| static void print_guid(const GUID *g) |
| { |
| int i; |
| PRINT_IF_GUID(g, ff_asf_header); |
| else PRINT_IF_GUID(g, ff_asf_file_header); |
| else PRINT_IF_GUID(g, ff_asf_stream_header); |
| else PRINT_IF_GUID(g, ff_asf_audio_stream); |
| else PRINT_IF_GUID(g, ff_asf_audio_conceal_none); |
| else PRINT_IF_GUID(g, ff_asf_video_stream); |
| else PRINT_IF_GUID(g, ff_asf_video_conceal_none); |
| else PRINT_IF_GUID(g, ff_asf_command_stream); |
| else PRINT_IF_GUID(g, ff_asf_comment_header); |
| else PRINT_IF_GUID(g, ff_asf_codec_comment_header); |
| else PRINT_IF_GUID(g, ff_asf_codec_comment1_header); |
| else PRINT_IF_GUID(g, ff_asf_data_header); |
| else PRINT_IF_GUID(g, index_guid); |
| else PRINT_IF_GUID(g, ff_asf_head1_guid); |
| else PRINT_IF_GUID(g, ff_asf_head2_guid); |
| else PRINT_IF_GUID(g, ff_asf_my_guid); |
| else PRINT_IF_GUID(g, ff_asf_ext_stream_header); |
| else PRINT_IF_GUID(g, ff_asf_extended_content_header); |
| else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header); |
| else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream); |
| else PRINT_IF_GUID(g, ff_asf_metadata_header); |
| else PRINT_IF_GUID(g, stream_bitrate_guid); |
| else |
| dprintf(NULL, "(GUID: unknown) "); |
| for(i=0;i<16;i++) |
| dprintf(NULL, " 0x%02x,", (*g)[i]); |
| dprintf(NULL, "}\n"); |
| } |
| #undef PRINT_IF_GUID |
| #else |
| #define print_guid(g) |
| #endif |
| |
| static void get_guid(ByteIOContext *s, GUID *g) |
| { |
| assert(sizeof(*g) == 16); |
| get_buffer(s, *g, sizeof(*g)); |
| } |
| |
| #if 0 |
| static void get_str16(ByteIOContext *pb, char *buf, int buf_size) |
| { |
| int len, c; |
| char *q; |
| |
| len = get_le16(pb); |
| q = buf; |
| while (len > 0) { |
| c = get_le16(pb); |
| if ((q - buf) < buf_size - 1) |
| *q++ = c; |
| len--; |
| } |
| *q = '\0'; |
| } |
| #endif |
| |
| static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size) |
| { |
| char* q = buf; |
| len /= 2; |
| while (len--) { |
| uint8_t tmp; |
| PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;) |
| } |
| *q = '\0'; |
| } |
| |
| static int asf_probe(AVProbeData *pd) |
| { |
| /* check file header */ |
| if (!memcmp(pd->buf, &ff_asf_header, sizeof(GUID))) |
| return AVPROBE_SCORE_MAX; |
| else |
| return 0; |
| } |
| |
| static int get_value(ByteIOContext *pb, int type){ |
| switch(type){ |
| case 2: return get_le32(pb); |
| case 3: return get_le32(pb); |
| case 4: return get_le64(pb); |
| case 5: return get_le16(pb); |
| default:return INT_MIN; |
| } |
| } |
| |
| static void get_tag(AVFormatContext *s, const char *key, int type, int len) |
| { |
| char value[1024]; |
| if (type <= 1) { // unicode or byte |
| get_str16_nolen(s->pb, len, value, sizeof(value)); |
| } else if (type <= 5) { // boolean or DWORD or QWORD or WORD |
| uint64_t num = get_value(s->pb, type); |
| snprintf(value, sizeof(value), "%"PRIu64, num); |
| } else { |
| url_fskip(s->pb, len); |
| return; |
| } |
| if (strncmp(key, "WM/", 3)) |
| key += 3; |
| av_metadata_set(&s->metadata, key, value); |
| } |
| |
| static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap) |
| { |
| ASFContext *asf = s->priv_data; |
| GUID g; |
| ByteIOContext *pb = s->pb; |
| AVStream *st; |
| ASFStream *asf_st; |
| int size, i; |
| int64_t gsize; |
| AVRational dar[128]; |
| uint32_t bitrate[128]; |
| |
| memset(dar, 0, sizeof(dar)); |
| memset(bitrate, 0, sizeof(bitrate)); |
| |
| get_guid(pb, &g); |
| if (memcmp(&g, &ff_asf_header, sizeof(GUID))) |
| return -1; |
| get_le64(pb); |
| get_le32(pb); |
| get_byte(pb); |
| get_byte(pb); |
| memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid)); |
| for(;;) { |
| get_guid(pb, &g); |
| gsize = get_le64(pb); |
| dprintf(s, "%08"PRIx64": ", url_ftell(pb) - 24); |
| print_guid(&g); |
| dprintf(s, " size=0x%"PRIx64"\n", gsize); |
| if (!memcmp(&g, &ff_asf_data_header, sizeof(GUID))) { |
| asf->data_object_offset = url_ftell(pb); |
| // if not streaming, gsize is not unlimited (how?), and there is enough space in the file.. |
| if (!(asf->hdr.flags & 0x01) && gsize >= 100) { |
| asf->data_object_size = gsize - 24; |
| } else { |
| asf->data_object_size = (uint64_t)-1; |
| } |
| break; |
| } |
| if (gsize < 24) |
| return -1; |
| if (!memcmp(&g, &ff_asf_file_header, sizeof(GUID))) { |
| get_guid(pb, &asf->hdr.guid); |
| asf->hdr.file_size = get_le64(pb); |
| asf->hdr.create_time = get_le64(pb); |
| asf->nb_packets = get_le64(pb); |
| asf->hdr.play_time = get_le64(pb); |
| asf->hdr.send_time = get_le64(pb); |
| asf->hdr.preroll = get_le32(pb); |
| asf->hdr.ignore = get_le32(pb); |
| asf->hdr.flags = get_le32(pb); |
| asf->hdr.min_pktsize = get_le32(pb); |
| asf->hdr.max_pktsize = get_le32(pb); |
| asf->hdr.max_bitrate = get_le32(pb); |
| s->packet_size = asf->hdr.max_pktsize; |
| } else if (!memcmp(&g, &ff_asf_stream_header, sizeof(GUID))) { |
| enum CodecType type; |
| int type_specific_size, sizeX; |
| uint64_t total_size; |
| unsigned int tag1; |
| int64_t pos1, pos2, start_time; |
| int test_for_ext_stream_audio, is_dvr_ms_audio=0; |
| |
| pos1 = url_ftell(pb); |
| |
| st = av_new_stream(s, 0); |
| if (!st) |
| return AVERROR(ENOMEM); |
| av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ |
| asf_st = av_mallocz(sizeof(ASFStream)); |
| if (!asf_st) |
| return AVERROR(ENOMEM); |
| st->priv_data = asf_st; |
| start_time = asf->hdr.preroll; |
| |
| if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming... |
| st->duration = asf->hdr.send_time / |
| (10000000 / 1000) - start_time; |
| } |
| get_guid(pb, &g); |
| |
| test_for_ext_stream_audio = 0; |
| if (!memcmp(&g, &ff_asf_audio_stream, sizeof(GUID))) { |
| type = CODEC_TYPE_AUDIO; |
| } else if (!memcmp(&g, &ff_asf_video_stream, sizeof(GUID))) { |
| type = CODEC_TYPE_VIDEO; |
| } else if (!memcmp(&g, &ff_asf_command_stream, sizeof(GUID))) { |
| type = CODEC_TYPE_DATA; |
| } else if (!memcmp(&g, &ff_asf_ext_stream_embed_stream_header, sizeof(GUID))) { |
| test_for_ext_stream_audio = 1; |
| type = CODEC_TYPE_UNKNOWN; |
| } else { |
| return -1; |
| } |
| get_guid(pb, &g); |
| total_size = get_le64(pb); |
| type_specific_size = get_le32(pb); |
| get_le32(pb); |
| st->id = get_le16(pb) & 0x7f; /* stream id */ |
| // mapping of asf ID to AV stream ID; |
| asf->asfid2avid[st->id] = s->nb_streams - 1; |
| |
| get_le32(pb); |
| |
| if (test_for_ext_stream_audio) { |
| get_guid(pb, &g); |
| if (!memcmp(&g, &ff_asf_ext_stream_audio_stream, sizeof(GUID))) { |
| type = CODEC_TYPE_AUDIO; |
| is_dvr_ms_audio=1; |
| get_guid(pb, &g); |
| get_le32(pb); |
| get_le32(pb); |
| get_le32(pb); |
| get_guid(pb, &g); |
| get_le32(pb); |
| } |
| } |
| |
| st->codec->codec_type = type; |
| if (type == CODEC_TYPE_AUDIO) { |
| get_wav_header(pb, st->codec, type_specific_size); |
| if (is_dvr_ms_audio) { |
| // codec_id and codec_tag are unreliable in dvr_ms |
| // files. Set them later by probing stream. |
| st->codec->codec_id = CODEC_ID_PROBE; |
| st->codec->codec_tag = 0; |
| } |
| if (st->codec->codec_id == CODEC_ID_AAC) { |
| st->need_parsing = AVSTREAM_PARSE_NONE; |
| } else { |
| st->need_parsing = AVSTREAM_PARSE_FULL; |
| } |
| /* We have to init the frame size at some point .... */ |
| pos2 = url_ftell(pb); |
| if (gsize >= (pos2 + 8 - pos1 + 24)) { |
| asf_st->ds_span = get_byte(pb); |
| asf_st->ds_packet_size = get_le16(pb); |
| asf_st->ds_chunk_size = get_le16(pb); |
| get_le16(pb); //ds_data_size |
| get_byte(pb); //ds_silence_data |
| } |
| //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n", |
| // asf_st->ds_packet_size, asf_st->ds_chunk_size, |
| // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data); |
| if (asf_st->ds_span > 1) { |
| if (!asf_st->ds_chunk_size |
| || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1) |
| || asf_st->ds_packet_size % asf_st->ds_chunk_size) |
| asf_st->ds_span = 0; // disable descrambling |
| } |
| switch (st->codec->codec_id) { |
| case CODEC_ID_MP3: |
| st->codec->frame_size = MPA_FRAME_SIZE; |
| break; |
| case CODEC_ID_PCM_S16LE: |
| case CODEC_ID_PCM_S16BE: |
| case CODEC_ID_PCM_U16LE: |
| case CODEC_ID_PCM_U16BE: |
| case CODEC_ID_PCM_S8: |
| case CODEC_ID_PCM_U8: |
| case CODEC_ID_PCM_ALAW: |
| case CODEC_ID_PCM_MULAW: |
| st->codec->frame_size = 1; |
| break; |
| default: |
| /* This is probably wrong, but it prevents a crash later */ |
| st->codec->frame_size = 1; |
| break; |
| } |
| } else if (type == CODEC_TYPE_VIDEO) { |
| get_le32(pb); |
| get_le32(pb); |
| get_byte(pb); |
| size = get_le16(pb); /* size */ |
| sizeX= get_le32(pb); /* size */ |
| st->codec->width = get_le32(pb); |
| st->codec->height = get_le32(pb); |
| /* not available for asf */ |
| get_le16(pb); /* panes */ |
| st->codec->bits_per_coded_sample = get_le16(pb); /* depth */ |
| tag1 = get_le32(pb); |
| url_fskip(pb, 20); |
| // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX); |
| size= sizeX; |
| if (size > 40) { |
| st->codec->extradata_size = size - 40; |
| st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| get_buffer(pb, st->codec->extradata, st->codec->extradata_size); |
| } |
| |
| /* Extract palette from extradata if bpp <= 8 */ |
| /* This code assumes that extradata contains only palette */ |
| /* This is true for all paletted codecs implemented in ffmpeg */ |
| if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) { |
| st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl)); |
| #ifdef WORDS_BIGENDIAN |
| for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++) |
| st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]); |
| #else |
| memcpy(st->codec->palctrl->palette, st->codec->extradata, |
| FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)); |
| #endif |
| st->codec->palctrl->palette_changed = 1; |
| } |
| |
| st->codec->codec_tag = tag1; |
| st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1); |
| if(tag1 == MKTAG('D', 'V', 'R', ' ')) |
| st->need_parsing = AVSTREAM_PARSE_FULL; |
| } |
| pos2 = url_ftell(pb); |
| url_fskip(pb, gsize - (pos2 - pos1 + 24)); |
| } else if (!memcmp(&g, &ff_asf_comment_header, sizeof(GUID))) { |
| int len1, len2, len3, len4, len5; |
| |
| len1 = get_le16(pb); |
| len2 = get_le16(pb); |
| len3 = get_le16(pb); |
| len4 = get_le16(pb); |
| len5 = get_le16(pb); |
| get_tag(s, "title" , 0, len1); |
| get_tag(s, "author" , 0, len2); |
| get_tag(s, "copyright", 0, len3); |
| get_tag(s, "comment" , 0, len4); |
| url_fskip(pb, len5); |
| } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) { |
| int stream_count = get_le16(pb); |
| int j; |
| |
| // av_log(s, AV_LOG_ERROR, "stream bitrate properties\n"); |
| // av_log(s, AV_LOG_ERROR, "streams %d\n", streams); |
| for(j = 0; j < stream_count; j++) { |
| int flags, bitrate, stream_id; |
| |
| flags= get_le16(pb); |
| bitrate= get_le32(pb); |
| stream_id= (flags & 0x7f); |
| // av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate); |
| asf->stream_bitrates[stream_id]= bitrate; |
| } |
| } else if (!memcmp(&g, &ff_asf_extended_content_header, sizeof(GUID))) { |
| int desc_count, i; |
| |
| desc_count = get_le16(pb); |
| for(i=0;i<desc_count;i++) |
| { |
| int name_len,value_type,value_len; |
| char name[1024]; |
| |
| name_len = get_le16(pb); |
| get_str16_nolen(pb, name_len, name, sizeof(name)); |
| value_type = get_le16(pb); |
| value_len = get_le16(pb); |
| get_tag(s, name, value_type, value_len); |
| } |
| } else if (!memcmp(&g, &ff_asf_metadata_header, sizeof(GUID))) { |
| int n, stream_num, name_len, value_len, value_type, value_num; |
| n = get_le16(pb); |
| |
| for(i=0;i<n;i++) { |
| char name[1024]; |
| |
| get_le16(pb); //lang_list_index |
| stream_num= get_le16(pb); |
| name_len= get_le16(pb); |
| value_type= get_le16(pb); |
| value_len= get_le32(pb); |
| |
| get_str16_nolen(pb, name_len, name, sizeof(name)); |
| //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name); |
| value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere |
| url_fskip(pb, value_len - 2); |
| |
| if(stream_num<128){ |
| if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num; |
| else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num; |
| } |
| } |
| } else if (!memcmp(&g, &ff_asf_ext_stream_header, sizeof(GUID))) { |
| int ext_len, payload_ext_ct, stream_ct; |
| uint32_t ext_d, leak_rate, stream_num; |
| int64_t pos_ex_st; |
| pos_ex_st = url_ftell(pb); |
| |
| get_le64(pb); // starttime |
| get_le64(pb); // endtime |
| leak_rate = get_le32(pb); // leak-datarate |
| get_le32(pb); // bucket-datasize |
| get_le32(pb); // init-bucket-fullness |
| get_le32(pb); // alt-leak-datarate |
| get_le32(pb); // alt-bucket-datasize |
| get_le32(pb); // alt-init-bucket-fullness |
| get_le32(pb); // max-object-size |
| get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved) |
| stream_num = get_le16(pb); // stream-num |
| get_le16(pb); // stream-language-id-index |
| get_le64(pb); // avg frametime in 100ns units |
| stream_ct = get_le16(pb); //stream-name-count |
| payload_ext_ct = get_le16(pb); //payload-extension-system-count |
| |
| if (stream_num < 128) |
| bitrate[stream_num] = leak_rate; |
| |
| for (i=0; i<stream_ct; i++){ |
| get_le16(pb); |
| ext_len = get_le16(pb); |
| url_fseek(pb, ext_len, SEEK_CUR); |
| } |
| |
| for (i=0; i<payload_ext_ct; i++){ |
| get_guid(pb, &g); |
| ext_d=get_le16(pb); |
| ext_len=get_le32(pb); |
| url_fseek(pb, ext_len, SEEK_CUR); |
| } |
| |
| // there could be a optional stream properties object to follow |
| // if so the next iteration will pick it up |
| } else if (!memcmp(&g, &ff_asf_head1_guid, sizeof(GUID))) { |
| int v1, v2; |
| get_guid(pb, &g); |
| v1 = get_le32(pb); |
| v2 = get_le16(pb); |
| #if 0 |
| } else if (!memcmp(&g, &ff_asf_codec_comment_header, sizeof(GUID))) { |
| int len, v1, n, num; |
| char str[256], *q; |
| char tag[16]; |
| |
| get_guid(pb, &g); |
| print_guid(&g); |
| |
| n = get_le32(pb); |
| for(i=0;i<n;i++) { |
| num = get_le16(pb); /* stream number */ |
| get_str16(pb, str, sizeof(str)); |
| get_str16(pb, str, sizeof(str)); |
| len = get_le16(pb); |
| q = tag; |
| while (len > 0) { |
| v1 = get_byte(pb); |
| if ((q - tag) < sizeof(tag) - 1) |
| *q++ = v1; |
| len--; |
| } |
| *q = '\0'; |
| } |
| #endif |
| } else if (url_feof(pb)) { |
| return -1; |
| } else { |
| url_fseek(pb, gsize - 24, SEEK_CUR); |
| } |
| } |
| get_guid(pb, &g); |
| get_le64(pb); |
| get_byte(pb); |
| get_byte(pb); |
| if (url_feof(pb)) |
| return -1; |
| asf->data_offset = url_ftell(pb); |
| asf->packet_size_left = 0; |
| |
| |
| for(i=0; i<128; i++){ |
| int stream_num= asf->asfid2avid[i]; |
| if(stream_num>=0){ |
| AVStream *st = s->streams[stream_num]; |
| if (!st->codec->bit_rate) |
| st->codec->bit_rate = bitrate[i]; |
| if (dar[i].num > 0 && dar[i].den > 0) |
| av_reduce(&st->sample_aspect_ratio.num, |
| &st->sample_aspect_ratio.den, |
| dar[i].num, dar[i].den, INT_MAX); |
| //av_log(s, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den); |
| } |
| } |
| |
| return 0; |
| } |
| |
| #define DO_2BITS(bits, var, defval) \ |
| switch (bits & 3) \ |
| { \ |
| case 3: var = get_le32(pb); rsize += 4; break; \ |
| case 2: var = get_le16(pb); rsize += 2; break; \ |
| case 1: var = get_byte(pb); rsize++; break; \ |
| default: var = defval; break; \ |
| } |
| |
| int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb) |
| { |
| ASFContext *asf = s->priv_data; |
| uint32_t packet_length, padsize; |
| int rsize = 8; |
| int c, d, e, off; |
| |
| off= 32768; |
| if (s->packet_size > 0) |
| off= (url_ftell(pb) - s->data_offset) % s->packet_size + 3; |
| |
| c=d=e=-1; |
| while(off-- > 0){ |
| c=d; d=e; |
| e= get_byte(pb); |
| if(c == 0x82 && !d && !e) |
| break; |
| } |
| |
| if (c != 0x82) { |
| if (!url_feof(pb)) |
| av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb)); |
| } |
| if ((c & 0x8f) == 0x82) { |
| if (d || e) { |
| if (!url_feof(pb)) |
| av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n"); |
| return -1; |
| } |
| c= get_byte(pb); |
| d= get_byte(pb); |
| rsize+=3; |
| }else{ |
| url_fseek(pb, -1, SEEK_CUR); //FIXME |
| } |
| |
| asf->packet_flags = c; |
| asf->packet_property = d; |
| |
| DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size); |
| DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored |
| DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length |
| |
| //the following checks prevent overflows and infinite loops |
| if(!packet_length || packet_length >= (1U<<29)){ |
| av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb)); |
| return -1; |
| } |
| if(padsize >= packet_length){ |
| av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb)); |
| return -1; |
| } |
| |
| asf->packet_timestamp = get_le32(pb); |
| get_le16(pb); /* duration */ |
| // rsize has at least 11 bytes which have to be present |
| |
| if (asf->packet_flags & 0x01) { |
| asf->packet_segsizetype = get_byte(pb); rsize++; |
| asf->packet_segments = asf->packet_segsizetype & 0x3f; |
| } else { |
| asf->packet_segments = 1; |
| asf->packet_segsizetype = 0x80; |
| } |
| asf->packet_size_left = packet_length - padsize - rsize; |
| if (packet_length < asf->hdr.min_pktsize) |
| padsize += asf->hdr.min_pktsize - packet_length; |
| asf->packet_padsize = padsize; |
| dprintf(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left); |
| return 0; |
| } |
| |
| /** |
| * |
| * @return <0 if error |
| */ |
| static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){ |
| ASFContext *asf = s->priv_data; |
| int rsize = 1; |
| int num = get_byte(pb); |
| int64_t ts0, ts1; |
| |
| asf->packet_segments--; |
| asf->packet_key_frame = num >> 7; |
| asf->stream_index = asf->asfid2avid[num & 0x7f]; |
| // sequence should be ignored! |
| DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0); |
| DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0); |
| DO_2BITS(asf->packet_property, asf->packet_replic_size, 0); |
| //printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size); |
| if (asf->packet_replic_size >= 8) { |
| asf->packet_obj_size = get_le32(pb); |
| if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){ |
| av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n"); |
| return -1; |
| } |
| asf->packet_frag_timestamp = get_le32(pb); // timestamp |
| if(asf->packet_replic_size >= 8+38+4){ |
| // for(i=0; i<asf->packet_replic_size-8; i++) |
| // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb)); |
| // av_log(s, AV_LOG_DEBUG, "\n"); |
| url_fskip(pb, 10); |
| ts0= get_le64(pb); |
| ts1= get_le64(pb); |
| url_fskip(pb, 12); |
| get_le32(pb); |
| url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4); |
| if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000; |
| else asf->packet_frag_timestamp= AV_NOPTS_VALUE; |
| }else |
| url_fskip(pb, asf->packet_replic_size - 8); |
| rsize += asf->packet_replic_size; // FIXME - check validity |
| } else if (asf->packet_replic_size==1){ |
| // multipacket - frag_offset is beginning timestamp |
| asf->packet_time_start = asf->packet_frag_offset; |
| asf->packet_frag_offset = 0; |
| asf->packet_frag_timestamp = asf->packet_timestamp; |
| |
| asf->packet_time_delta = get_byte(pb); |
| rsize++; |
| }else if(asf->packet_replic_size!=0){ |
| av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size); |
| return -1; |
| } |
| if (asf->packet_flags & 0x01) { |
| DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal |
| if(asf->packet_frag_size > asf->packet_size_left - rsize){ |
| av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n"); |
| return -1; |
| } |
| //printf("Fragsize %d\n", asf->packet_frag_size); |
| } else { |
| asf->packet_frag_size = asf->packet_size_left - rsize; |
| //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize); |
| } |
| if (asf->packet_replic_size == 1) { |
| asf->packet_multi_size = asf->packet_frag_size; |
| if (asf->packet_multi_size > asf->packet_size_left) |
| return -1; |
| } |
| asf->packet_size_left -= rsize; |
| //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize); |
| |
| return 0; |
| } |
| |
| int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt) |
| { |
| ASFContext *asf = s->priv_data; |
| ASFStream *asf_st = 0; |
| for (;;) { |
| if(url_feof(pb)) |
| return AVERROR(EIO); |
| if (asf->packet_size_left < FRAME_HEADER_SIZE |
| || asf->packet_segments < 1) { |
| //asf->packet_size_left <= asf->packet_padsize) { |
| int ret = asf->packet_size_left + asf->packet_padsize; |
| //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb)); |
| assert(ret>=0); |
| /* fail safe */ |
| url_fskip(pb, ret); |
| |
| asf->packet_pos= url_ftell(pb); |
| if (asf->data_object_size != (uint64_t)-1 && |
| (asf->packet_pos - asf->data_object_offset >= asf->data_object_size)) |
| return AVERROR(EIO); /* Do not exceed the size of the data object */ |
| return 1; |
| } |
| if (asf->packet_time_start == 0) { |
| if(asf_read_frame_header(s, pb) < 0){ |
| asf->packet_segments= 0; |
| continue; |
| } |
| if (asf->stream_index < 0 |
| || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL |
| || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY) |
| ) { |
| asf->packet_time_start = 0; |
| /* unhandled packet (should not happen) */ |
| url_fskip(pb, asf->packet_frag_size); |
| asf->packet_size_left -= asf->packet_frag_size; |
| if(asf->stream_index < 0) |
| av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size); |
| continue; |
| } |
| asf->asf_st = s->streams[asf->stream_index]->priv_data; |
| } |
| asf_st = asf->asf_st; |
| |
| if (asf->packet_replic_size == 1) { |
| // frag_offset is here used as the beginning timestamp |
| asf->packet_frag_timestamp = asf->packet_time_start; |
| asf->packet_time_start += asf->packet_time_delta; |
| asf->packet_obj_size = asf->packet_frag_size = get_byte(pb); |
| asf->packet_size_left--; |
| asf->packet_multi_size--; |
| if (asf->packet_multi_size < asf->packet_obj_size) |
| { |
| asf->packet_time_start = 0; |
| url_fskip(pb, asf->packet_multi_size); |
| asf->packet_size_left -= asf->packet_multi_size; |
| continue; |
| } |
| asf->packet_multi_size -= asf->packet_obj_size; |
| //printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size); |
| } |
| if( /*asf->packet_frag_size == asf->packet_obj_size*/ |
| asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size |
| && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){ |
| av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n", |
| asf_st->frag_offset, asf->packet_frag_size, |
| asf->packet_obj_size, asf_st->pkt.size); |
| asf->packet_obj_size= asf_st->pkt.size; |
| } |
| |
| if ( asf_st->pkt.size != asf->packet_obj_size |
| || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient? |
| if(asf_st->pkt.data){ |
| av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size); |
| asf_st->frag_offset = 0; |
| av_free_packet(&asf_st->pkt); |
| } |
| /* new packet */ |
| av_new_packet(&asf_st->pkt, asf->packet_obj_size); |
| asf_st->seq = asf->packet_seq; |
| asf_st->pkt.dts = asf->packet_frag_timestamp; |
| asf_st->pkt.stream_index = asf->stream_index; |
| asf_st->pkt.pos = |
| asf_st->packet_pos= asf->packet_pos; |
| //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n", |
| //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY, |
| //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size); |
| if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO) |
| asf->packet_key_frame = 1; |
| if (asf->packet_key_frame) |
| asf_st->pkt.flags |= PKT_FLAG_KEY; |
| } |
| |
| /* read data */ |
| //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n", |
| // s->packet_size, asf_st->pkt.size, asf->packet_frag_offset, |
| // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data); |
| asf->packet_size_left -= asf->packet_frag_size; |
| if (asf->packet_size_left < 0) |
| continue; |
| |
| if( asf->packet_frag_offset >= asf_st->pkt.size |
| || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){ |
| av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n", |
| asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size); |
| continue; |
| } |
| |
| get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset, |
| asf->packet_frag_size); |
| if (s->key && s->keylen == 20) |
| ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset, |
| asf->packet_frag_size); |
| asf_st->frag_offset += asf->packet_frag_size; |
| /* test if whole packet is read */ |
| if (asf_st->frag_offset == asf_st->pkt.size) { |
| //workaround for macroshit radio DVR-MS files |
| if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO |
| && asf_st->pkt.size > 100){ |
| int i; |
| for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++); |
| if(i == asf_st->pkt.size){ |
| av_log(s, AV_LOG_DEBUG, "discarding ms fart\n"); |
| asf_st->frag_offset = 0; |
| av_free_packet(&asf_st->pkt); |
| continue; |
| } |
| } |
| |
| /* return packet */ |
| if (asf_st->ds_span > 1) { |
| if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){ |
| av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span); |
| }else{ |
| /* packet descrambling */ |
| uint8_t *newdata = av_malloc(asf_st->pkt.size); |
| if (newdata) { |
| int offset = 0; |
| while (offset < asf_st->pkt.size) { |
| int off = offset / asf_st->ds_chunk_size; |
| int row = off / asf_st->ds_span; |
| int col = off % asf_st->ds_span; |
| int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size; |
| //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx); |
| |
| assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size); |
| assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size); |
| memcpy(newdata + offset, |
| asf_st->pkt.data + idx * asf_st->ds_chunk_size, |
| asf_st->ds_chunk_size); |
| offset += asf_st->ds_chunk_size; |
| } |
| av_free(asf_st->pkt.data); |
| asf_st->pkt.data = newdata; |
| } |
| } |
| } |
| asf_st->frag_offset = 0; |
| *pkt= asf_st->pkt; |
| //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size); |
| asf_st->pkt.size = 0; |
| asf_st->pkt.data = 0; |
| break; // packet completed |
| } |
| } |
| return 0; |
| } |
| |
| static int asf_read_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| ASFContext *asf = s->priv_data; |
| |
| for (;;) { |
| int ret; |
| |
| /* parse cached packets, if any */ |
| if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0) |
| return ret; |
| if ((ret = ff_asf_get_packet(s, s->pb)) < 0) |
| assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1); |
| asf->packet_time_start = 0; |
| } |
| |
| return 0; |
| } |
| |
| // Added to support seeking after packets have been read |
| // If information is not reset, read_packet fails due to |
| // leftover information from previous reads |
| static void asf_reset_header(AVFormatContext *s) |
| { |
| ASFContext *asf = s->priv_data; |
| ASFStream *asf_st; |
| int i; |
| |
| asf->packet_nb_frames = 0; |
| asf->packet_size_left = 0; |
| asf->packet_segments = 0; |
| asf->packet_flags = 0; |
| asf->packet_property = 0; |
| asf->packet_timestamp = 0; |
| asf->packet_segsizetype = 0; |
| asf->packet_segments = 0; |
| asf->packet_seq = 0; |
| asf->packet_replic_size = 0; |
| asf->packet_key_frame = 0; |
| asf->packet_padsize = 0; |
| asf->packet_frag_offset = 0; |
| asf->packet_frag_size = 0; |
| asf->packet_frag_timestamp = 0; |
| asf->packet_multi_size = 0; |
| asf->packet_obj_size = 0; |
| asf->packet_time_delta = 0; |
| asf->packet_time_start = 0; |
| |
| for(i=0; i<s->nb_streams; i++){ |
| asf_st= s->streams[i]->priv_data; |
| av_free_packet(&asf_st->pkt); |
| asf_st->frag_offset=0; |
| asf_st->seq=0; |
| } |
| asf->asf_st= NULL; |
| } |
| |
| static int asf_read_close(AVFormatContext *s) |
| { |
| int i; |
| |
| asf_reset_header(s); |
| for(i=0;i<s->nb_streams;i++) { |
| AVStream *st = s->streams[i]; |
| av_free(st->codec->palctrl); |
| } |
| return 0; |
| } |
| |
| static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit) |
| { |
| AVPacket pkt1, *pkt = &pkt1; |
| ASFStream *asf_st; |
| int64_t pts; |
| int64_t pos= *ppos; |
| int i; |
| int64_t start_pos[s->nb_streams]; |
| |
| for(i=0; i<s->nb_streams; i++){ |
| start_pos[i]= pos; |
| } |
| |
| if (s->packet_size > 0) |
| pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset; |
| *ppos= pos; |
| url_fseek(s->pb, pos, SEEK_SET); |
| |
| //printf("asf_read_pts\n"); |
| asf_reset_header(s); |
| for(;;){ |
| if (av_read_frame(s, pkt) < 0){ |
| av_log(s, AV_LOG_INFO, "asf_read_pts failed\n"); |
| return AV_NOPTS_VALUE; |
| } |
| |
| pts= pkt->pts; |
| |
| av_free_packet(pkt); |
| if(pkt->flags&PKT_FLAG_KEY){ |
| i= pkt->stream_index; |
| |
| asf_st= s->streams[i]->priv_data; |
| |
| // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0); |
| pos= asf_st->packet_pos; |
| |
| av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME); |
| start_pos[i]= asf_st->packet_pos + 1; |
| |
| if(pkt->stream_index == stream_index) |
| break; |
| } |
| } |
| |
| *ppos= pos; |
| //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts); |
| |
| return pts; |
| } |
| |
| static void asf_build_simple_index(AVFormatContext *s, int stream_index) |
| { |
| GUID g; |
| ASFContext *asf = s->priv_data; |
| int64_t gsize, itime; |
| int64_t pos, current_pos, index_pts; |
| int i; |
| int pct,ict; |
| |
| current_pos = url_ftell(s->pb); |
| |
| url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET); |
| get_guid(s->pb, &g); |
| if (!memcmp(&g, &index_guid, sizeof(GUID))) { |
| gsize = get_le64(s->pb); |
| get_guid(s->pb, &g); |
| itime=get_le64(s->pb); |
| pct=get_le32(s->pb); |
| ict=get_le32(s->pb); |
| av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict); |
| |
| for (i=0;i<ict;i++){ |
| int pktnum=get_le32(s->pb); |
| int pktct =get_le16(s->pb); |
| av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct); |
| |
| pos=s->data_offset + s->packet_size*(int64_t)pktnum; |
| index_pts=av_rescale(itime, i, 10000); |
| |
| av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME); |
| } |
| asf->index_read= 1; |
| } |
| url_fseek(s->pb, current_pos, SEEK_SET); |
| } |
| |
| static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags) |
| { |
| ASFContext *asf = s->priv_data; |
| AVStream *st = s->streams[stream_index]; |
| int64_t pos; |
| int index; |
| |
| if (s->packet_size <= 0) |
| return -1; |
| |
| /* Try using the protocol's read_seek if available */ |
| if(s->pb) { |
| int ret = av_url_read_fseek(s->pb, stream_index, pts, flags); |
| if(ret >= 0) |
| asf_reset_header(s); |
| if (ret != AVERROR(ENOSYS)) |
| return ret; |
| } |
| |
| if (!asf->index_read) |
| asf_build_simple_index(s, stream_index); |
| |
| if(!(asf->index_read && st->index_entries)){ |
| if(av_seek_frame_binary(s, stream_index, pts, flags)<0) |
| return -1; |
| }else{ |
| index= av_index_search_timestamp(st, pts, flags); |
| if(index<0) |
| return -1; |
| |
| /* find the position */ |
| pos = st->index_entries[index].pos; |
| pts = st->index_entries[index].timestamp; |
| |
| // various attempts to find key frame have failed so far |
| // asf_reset_header(s); |
| // url_fseek(s->pb, pos, SEEK_SET); |
| // key_pos = pos; |
| // for(i=0;i<16;i++){ |
| // pos = url_ftell(s->pb); |
| // if (av_read_frame(s, &pkt) < 0){ |
| // av_log(s, AV_LOG_INFO, "seek failed\n"); |
| // return -1; |
| // } |
| // asf_st = s->streams[stream_index]->priv_data; |
| // pos += st->parser->frame_offset; |
| // |
| // if (pkt.size > b) { |
| // b = pkt.size; |
| // key_pos = pos; |
| // } |
| // |
| // av_free_packet(&pkt); |
| // } |
| |
| /* do the seek */ |
| av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos); |
| url_fseek(s->pb, pos, SEEK_SET); |
| } |
| asf_reset_header(s); |
| return 0; |
| } |
| |
| AVInputFormat asf_demuxer = { |
| "asf", |
| NULL_IF_CONFIG_SMALL("ASF format"), |
| sizeof(ASFContext), |
| asf_probe, |
| asf_read_header, |
| asf_read_packet, |
| asf_read_close, |
| asf_read_seek, |
| asf_read_pts, |
| .metadata_conv = ff_asf_metadata_conv, |
| }; |
