| /* |
| * AVI muxer |
| * Copyright (c) 2000 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 "avi.h" |
| #include "riff.h" |
| |
| /* |
| * TODO: |
| * - fill all fields if non streamed (nb_frames for example) |
| */ |
| |
| typedef struct AVIIentry { |
| unsigned int flags, pos, len; |
| } AVIIentry; |
| |
| #define AVI_INDEX_CLUSTER_SIZE 16384 |
| |
| typedef struct AVIIndex { |
| int64_t indx_start; |
| int entry; |
| int ents_allocated; |
| AVIIentry** cluster; |
| } AVIIndex; |
| |
| typedef struct { |
| int64_t riff_start, movi_list, odml_list; |
| int64_t frames_hdr_all, frames_hdr_strm[MAX_STREAMS]; |
| int audio_strm_length[MAX_STREAMS]; |
| int riff_id; |
| int packet_count[MAX_STREAMS]; |
| |
| AVIIndex indexes[MAX_STREAMS]; |
| } AVIContext; |
| |
| static inline AVIIentry* avi_get_ientry(AVIIndex* idx, int ent_id) |
| { |
| int cl = ent_id / AVI_INDEX_CLUSTER_SIZE; |
| int id = ent_id % AVI_INDEX_CLUSTER_SIZE; |
| return &idx->cluster[cl][id]; |
| } |
| |
| static int64_t avi_start_new_riff(AVIContext *avi, ByteIOContext *pb, |
| const char* riff_tag, const char* list_tag) |
| { |
| int64_t loff; |
| int i; |
| |
| avi->riff_id++; |
| for (i=0; i<MAX_STREAMS; i++) |
| avi->indexes[i].entry = 0; |
| |
| avi->riff_start = start_tag(pb, "RIFF"); |
| put_tag(pb, riff_tag); |
| loff = start_tag(pb, "LIST"); |
| put_tag(pb, list_tag); |
| return loff; |
| } |
| |
| static char* avi_stream2fourcc(char* tag, int index, enum CodecType type) |
| { |
| tag[0] = '0'; |
| tag[1] = '0' + index; |
| if (type == CODEC_TYPE_VIDEO) { |
| tag[2] = 'd'; |
| tag[3] = 'c'; |
| } else { |
| tag[2] = 'w'; |
| tag[3] = 'b'; |
| } |
| tag[4] = '\0'; |
| return tag; |
| } |
| |
| static void avi_write_info_tag(ByteIOContext *pb, const char *tag, const char *str) |
| { |
| int len = strlen(str); |
| if (len > 0) { |
| len++; |
| put_tag(pb, tag); |
| put_le32(pb, len); |
| put_strz(pb, str); |
| if (len & 1) |
| put_byte(pb, 0); |
| } |
| } |
| |
| static void avi_write_info_tag2(AVFormatContext *s, const char *fourcc, const char *key1, const char *key2) |
| { |
| AVMetadataTag *tag= av_metadata_get(s->metadata, key1, NULL, 0); |
| if(!tag && key2) |
| tag= av_metadata_get(s->metadata, key2, NULL, 0); |
| if(tag) |
| avi_write_info_tag(s->pb, fourcc, tag->value); |
| } |
| |
| static int avi_write_counters(AVFormatContext* s, int riff_id) |
| { |
| ByteIOContext *pb = s->pb; |
| AVIContext *avi = s->priv_data; |
| int n, au_byterate, au_ssize, au_scale, nb_frames = 0; |
| int64_t file_size; |
| AVCodecContext* stream; |
| |
| file_size = url_ftell(pb); |
| for(n = 0; n < s->nb_streams; n++) { |
| assert(avi->frames_hdr_strm[n]); |
| stream = s->streams[n]->codec; |
| url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET); |
| ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale); |
| if(au_ssize == 0) { |
| put_le32(pb, avi->packet_count[n]); |
| } else { |
| put_le32(pb, avi->audio_strm_length[n] / au_ssize); |
| } |
| if(stream->codec_type == CODEC_TYPE_VIDEO) |
| nb_frames = FFMAX(nb_frames, avi->packet_count[n]); |
| } |
| if(riff_id == 1) { |
| assert(avi->frames_hdr_all); |
| url_fseek(pb, avi->frames_hdr_all, SEEK_SET); |
| put_le32(pb, nb_frames); |
| } |
| url_fseek(pb, file_size, SEEK_SET); |
| |
| return 0; |
| } |
| |
| static int avi_write_header(AVFormatContext *s) |
| { |
| AVIContext *avi = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale; |
| AVCodecContext *stream, *video_enc; |
| int64_t list1, list2, strh, strf; |
| |
| /* header list */ |
| avi->riff_id = 0; |
| list1 = avi_start_new_riff(avi, pb, "AVI ", "hdrl"); |
| |
| /* avi header */ |
| put_tag(pb, "avih"); |
| put_le32(pb, 14 * 4); |
| bitrate = 0; |
| |
| video_enc = NULL; |
| for(n=0;n<s->nb_streams;n++) { |
| stream = s->streams[n]->codec; |
| bitrate += stream->bit_rate; |
| if (stream->codec_type == CODEC_TYPE_VIDEO) |
| video_enc = stream; |
| } |
| |
| nb_frames = 0; |
| |
| if(video_enc){ |
| put_le32(pb, (uint32_t)(INT64_C(1000000) * video_enc->time_base.num / video_enc->time_base.den)); |
| } else { |
| put_le32(pb, 0); |
| } |
| put_le32(pb, bitrate / 8); /* XXX: not quite exact */ |
| put_le32(pb, 0); /* padding */ |
| if (url_is_streamed(pb)) |
| put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */ |
| else |
| put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */ |
| avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */ |
| put_le32(pb, nb_frames); /* nb frames, filled later */ |
| put_le32(pb, 0); /* initial frame */ |
| put_le32(pb, s->nb_streams); /* nb streams */ |
| put_le32(pb, 1024 * 1024); /* suggested buffer size */ |
| if(video_enc){ |
| put_le32(pb, video_enc->width); |
| put_le32(pb, video_enc->height); |
| } else { |
| put_le32(pb, 0); |
| put_le32(pb, 0); |
| } |
| put_le32(pb, 0); /* reserved */ |
| put_le32(pb, 0); /* reserved */ |
| put_le32(pb, 0); /* reserved */ |
| put_le32(pb, 0); /* reserved */ |
| |
| /* stream list */ |
| for(i=0;i<n;i++) { |
| list2 = start_tag(pb, "LIST"); |
| put_tag(pb, "strl"); |
| |
| stream = s->streams[i]->codec; |
| |
| /* stream generic header */ |
| strh = start_tag(pb, "strh"); |
| switch(stream->codec_type) { |
| case CODEC_TYPE_VIDEO: put_tag(pb, "vids"); break; |
| case CODEC_TYPE_AUDIO: put_tag(pb, "auds"); break; |
| // case CODEC_TYPE_TEXT : put_tag(pb, "txts"); break; |
| case CODEC_TYPE_DATA : put_tag(pb, "dats"); break; |
| } |
| if(stream->codec_type == CODEC_TYPE_VIDEO) |
| put_le32(pb, stream->codec_tag); |
| else |
| put_le32(pb, 1); |
| put_le32(pb, 0); /* flags */ |
| put_le16(pb, 0); /* priority */ |
| put_le16(pb, 0); /* language */ |
| put_le32(pb, 0); /* initial frame */ |
| |
| ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale); |
| |
| put_le32(pb, au_scale); /* scale */ |
| put_le32(pb, au_byterate); /* rate */ |
| av_set_pts_info(s->streams[i], 64, au_scale, au_byterate); |
| |
| put_le32(pb, 0); /* start */ |
| avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */ |
| if (url_is_streamed(pb)) |
| put_le32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */ |
| else |
| put_le32(pb, 0); /* length, XXX: filled later */ |
| |
| /* suggested buffer size */ //FIXME set at the end to largest chunk |
| if(stream->codec_type == CODEC_TYPE_VIDEO) |
| put_le32(pb, 1024 * 1024); |
| else if(stream->codec_type == CODEC_TYPE_AUDIO) |
| put_le32(pb, 12 * 1024); |
| else |
| put_le32(pb, 0); |
| put_le32(pb, -1); /* quality */ |
| put_le32(pb, au_ssize); /* sample size */ |
| put_le32(pb, 0); |
| put_le16(pb, stream->width); |
| put_le16(pb, stream->height); |
| end_tag(pb, strh); |
| |
| if(stream->codec_type != CODEC_TYPE_DATA){ |
| strf = start_tag(pb, "strf"); |
| switch(stream->codec_type) { |
| case CODEC_TYPE_VIDEO: |
| put_bmp_header(pb, stream, codec_bmp_tags, 0); |
| break; |
| case CODEC_TYPE_AUDIO: |
| if (put_wav_header(pb, stream) < 0) { |
| return -1; |
| } |
| break; |
| default: |
| return -1; |
| } |
| end_tag(pb, strf); |
| } |
| |
| if (!url_is_streamed(pb)) { |
| unsigned char tag[5]; |
| int j; |
| |
| /* Starting to lay out AVI OpenDML master index. |
| * We want to make it JUNK entry for now, since we'd |
| * like to get away without making AVI an OpenDML one |
| * for compatibility reasons. |
| */ |
| avi->indexes[i].entry = avi->indexes[i].ents_allocated = 0; |
| avi->indexes[i].indx_start = start_tag(pb, "JUNK"); |
| put_le16(pb, 4); /* wLongsPerEntry */ |
| put_byte(pb, 0); /* bIndexSubType (0 == frame index) */ |
| put_byte(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */ |
| put_le32(pb, 0); /* nEntriesInUse (will fill out later on) */ |
| put_tag(pb, avi_stream2fourcc(&tag[0], i, stream->codec_type)); |
| /* dwChunkId */ |
| put_le64(pb, 0); /* dwReserved[3] |
| put_le32(pb, 0); Must be 0. */ |
| for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++) |
| put_le64(pb, 0); |
| end_tag(pb, avi->indexes[i].indx_start); |
| } |
| |
| if( stream->codec_type == CODEC_TYPE_VIDEO |
| && s->streams[i]->sample_aspect_ratio.num>0 |
| && s->streams[i]->sample_aspect_ratio.den>0){ |
| int vprp= start_tag(pb, "vprp"); |
| AVRational dar = av_mul_q(s->streams[i]->sample_aspect_ratio, |
| (AVRational){stream->width, stream->height}); |
| int num, den; |
| av_reduce(&num, &den, dar.num, dar.den, 0xFFFF); |
| |
| put_le32(pb, 0); //video format = unknown |
| put_le32(pb, 0); //video standard= unknown |
| put_le32(pb, lrintf(1.0/av_q2d(stream->time_base))); |
| put_le32(pb, stream->width ); |
| put_le32(pb, stream->height); |
| put_le16(pb, den); |
| put_le16(pb, num); |
| put_le32(pb, stream->width ); |
| put_le32(pb, stream->height); |
| put_le32(pb, 1); //progressive FIXME |
| |
| put_le32(pb, stream->height); |
| put_le32(pb, stream->width ); |
| put_le32(pb, stream->height); |
| put_le32(pb, stream->width ); |
| put_le32(pb, 0); |
| put_le32(pb, 0); |
| |
| put_le32(pb, 0); |
| put_le32(pb, 0); |
| end_tag(pb, vprp); |
| } |
| |
| end_tag(pb, list2); |
| } |
| |
| if (!url_is_streamed(pb)) { |
| /* AVI could become an OpenDML one, if it grows beyond 2Gb range */ |
| avi->odml_list = start_tag(pb, "JUNK"); |
| put_tag(pb, "odml"); |
| put_tag(pb, "dmlh"); |
| put_le32(pb, 248); |
| for (i = 0; i < 248; i+= 4) |
| put_le32(pb, 0); |
| end_tag(pb, avi->odml_list); |
| } |
| |
| end_tag(pb, list1); |
| |
| list2 = start_tag(pb, "LIST"); |
| put_tag(pb, "INFO"); |
| avi_write_info_tag2(s, "INAM", "Title", NULL); |
| avi_write_info_tag2(s, "IART", "Artist", "Author"); |
| avi_write_info_tag2(s, "ICOP", "Copyright", NULL); |
| avi_write_info_tag2(s, "ICMT", "Comment", NULL); |
| avi_write_info_tag2(s, "IPRD", "Album", NULL); |
| avi_write_info_tag2(s, "IGNR", "Genre", NULL); |
| avi_write_info_tag2(s, "IPRT", "Track", NULL); |
| if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) |
| avi_write_info_tag(pb, "ISFT", LIBAVFORMAT_IDENT); |
| end_tag(pb, list2); |
| |
| /* some padding for easier tag editing */ |
| list2 = start_tag(pb, "JUNK"); |
| for (i = 0; i < 1016; i += 4) |
| put_le32(pb, 0); |
| end_tag(pb, list2); |
| |
| avi->movi_list = start_tag(pb, "LIST"); |
| put_tag(pb, "movi"); |
| |
| put_flush_packet(pb); |
| |
| return 0; |
| } |
| |
| static int avi_write_ix(AVFormatContext *s) |
| { |
| ByteIOContext *pb = s->pb; |
| AVIContext *avi = s->priv_data; |
| char tag[5]; |
| char ix_tag[] = "ix00"; |
| int i, j; |
| |
| assert(!url_is_streamed(pb)); |
| |
| if (avi->riff_id > AVI_MASTER_INDEX_SIZE) |
| return -1; |
| |
| for (i=0;i<s->nb_streams;i++) { |
| int64_t ix, pos; |
| |
| avi_stream2fourcc(&tag[0], i, s->streams[i]->codec->codec_type); |
| ix_tag[3] = '0' + i; |
| |
| /* Writing AVI OpenDML leaf index chunk */ |
| ix = url_ftell(pb); |
| put_tag(pb, &ix_tag[0]); /* ix?? */ |
| put_le32(pb, avi->indexes[i].entry * 8 + 24); |
| /* chunk size */ |
| put_le16(pb, 2); /* wLongsPerEntry */ |
| put_byte(pb, 0); /* bIndexSubType (0 == frame index) */ |
| put_byte(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */ |
| put_le32(pb, avi->indexes[i].entry); |
| /* nEntriesInUse */ |
| put_tag(pb, &tag[0]); /* dwChunkId */ |
| put_le64(pb, avi->movi_list);/* qwBaseOffset */ |
| put_le32(pb, 0); /* dwReserved_3 (must be 0) */ |
| |
| for (j=0; j<avi->indexes[i].entry; j++) { |
| AVIIentry* ie = avi_get_ientry(&avi->indexes[i], j); |
| put_le32(pb, ie->pos + 8); |
| put_le32(pb, ((uint32_t)ie->len & ~0x80000000) | |
| (ie->flags & 0x10 ? 0 : 0x80000000)); |
| } |
| put_flush_packet(pb); |
| pos = url_ftell(pb); |
| |
| /* Updating one entry in the AVI OpenDML master index */ |
| url_fseek(pb, avi->indexes[i].indx_start - 8, SEEK_SET); |
| put_tag(pb, "indx"); /* enabling this entry */ |
| url_fskip(pb, 8); |
| put_le32(pb, avi->riff_id); /* nEntriesInUse */ |
| url_fskip(pb, 16*avi->riff_id); |
| put_le64(pb, ix); /* qwOffset */ |
| put_le32(pb, pos - ix); /* dwSize */ |
| put_le32(pb, avi->indexes[i].entry); /* dwDuration */ |
| |
| url_fseek(pb, pos, SEEK_SET); |
| } |
| return 0; |
| } |
| |
| static int avi_write_idx1(AVFormatContext *s) |
| { |
| ByteIOContext *pb = s->pb; |
| AVIContext *avi = s->priv_data; |
| int64_t idx_chunk; |
| int i; |
| char tag[5]; |
| |
| if (!url_is_streamed(pb)) { |
| AVIIentry* ie = 0, *tie; |
| int entry[MAX_STREAMS]; |
| int empty, stream_id = -1; |
| |
| idx_chunk = start_tag(pb, "idx1"); |
| memset(&entry[0], 0, sizeof(entry)); |
| do { |
| empty = 1; |
| for (i=0; i<s->nb_streams; i++) { |
| if (avi->indexes[i].entry <= entry[i]) |
| continue; |
| |
| tie = avi_get_ientry(&avi->indexes[i], entry[i]); |
| if (empty || tie->pos < ie->pos) { |
| ie = tie; |
| stream_id = i; |
| } |
| empty = 0; |
| } |
| if (!empty) { |
| avi_stream2fourcc(&tag[0], stream_id, |
| s->streams[stream_id]->codec->codec_type); |
| put_tag(pb, &tag[0]); |
| put_le32(pb, ie->flags); |
| put_le32(pb, ie->pos); |
| put_le32(pb, ie->len); |
| entry[stream_id]++; |
| } |
| } while (!empty); |
| end_tag(pb, idx_chunk); |
| |
| avi_write_counters(s, avi->riff_id); |
| } |
| return 0; |
| } |
| |
| static int avi_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| AVIContext *avi = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| unsigned char tag[5]; |
| unsigned int flags=0; |
| const int stream_index= pkt->stream_index; |
| AVCodecContext *enc= s->streams[stream_index]->codec; |
| int size= pkt->size; |
| |
| // av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %d\n", pkt->dts, avi->packet_count[stream_index], stream_index); |
| while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avi->packet_count[stream_index]){ |
| AVPacket empty_packet; |
| |
| av_init_packet(&empty_packet); |
| empty_packet.size= 0; |
| empty_packet.data= NULL; |
| empty_packet.stream_index= stream_index; |
| avi_write_packet(s, &empty_packet); |
| // av_log(s, AV_LOG_DEBUG, "dup %"PRId64" %d\n", pkt->dts, avi->packet_count[stream_index]); |
| } |
| avi->packet_count[stream_index]++; |
| |
| // Make sure to put an OpenDML chunk when the file size exceeds the limits |
| if (!url_is_streamed(pb) && |
| (url_ftell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) { |
| |
| avi_write_ix(s); |
| end_tag(pb, avi->movi_list); |
| |
| if (avi->riff_id == 1) |
| avi_write_idx1(s); |
| |
| end_tag(pb, avi->riff_start); |
| avi->movi_list = avi_start_new_riff(avi, pb, "AVIX", "movi"); |
| } |
| |
| avi_stream2fourcc(&tag[0], stream_index, enc->codec_type); |
| if(pkt->flags&PKT_FLAG_KEY) |
| flags = 0x10; |
| if (enc->codec_type == CODEC_TYPE_AUDIO) { |
| avi->audio_strm_length[stream_index] += size; |
| } |
| |
| if (!url_is_streamed(s->pb)) { |
| AVIIndex* idx = &avi->indexes[stream_index]; |
| int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE; |
| int id = idx->entry % AVI_INDEX_CLUSTER_SIZE; |
| if (idx->ents_allocated <= idx->entry) { |
| idx->cluster = av_realloc(idx->cluster, (cl+1)*sizeof(void*)); |
| if (!idx->cluster) |
| return -1; |
| idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry)); |
| if (!idx->cluster[cl]) |
| return -1; |
| idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE; |
| } |
| |
| idx->cluster[cl][id].flags = flags; |
| idx->cluster[cl][id].pos = url_ftell(pb) - avi->movi_list; |
| idx->cluster[cl][id].len = size; |
| idx->entry++; |
| } |
| |
| put_buffer(pb, tag, 4); |
| put_le32(pb, size); |
| put_buffer(pb, pkt->data, size); |
| if (size & 1) |
| put_byte(pb, 0); |
| |
| put_flush_packet(pb); |
| return 0; |
| } |
| |
| static int avi_write_trailer(AVFormatContext *s) |
| { |
| AVIContext *avi = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| int res = 0; |
| int i, j, n, nb_frames; |
| int64_t file_size; |
| |
| if (!url_is_streamed(pb)){ |
| if (avi->riff_id == 1) { |
| end_tag(pb, avi->movi_list); |
| res = avi_write_idx1(s); |
| end_tag(pb, avi->riff_start); |
| } else { |
| avi_write_ix(s); |
| end_tag(pb, avi->movi_list); |
| end_tag(pb, avi->riff_start); |
| |
| file_size = url_ftell(pb); |
| url_fseek(pb, avi->odml_list - 8, SEEK_SET); |
| put_tag(pb, "LIST"); /* Making this AVI OpenDML one */ |
| url_fskip(pb, 16); |
| |
| for (n=nb_frames=0;n<s->nb_streams;n++) { |
| AVCodecContext *stream = s->streams[n]->codec; |
| if (stream->codec_type == CODEC_TYPE_VIDEO) { |
| if (nb_frames < avi->packet_count[n]) |
| nb_frames = avi->packet_count[n]; |
| } else { |
| if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) { |
| nb_frames += avi->packet_count[n]; |
| } |
| } |
| } |
| put_le32(pb, nb_frames); |
| url_fseek(pb, file_size, SEEK_SET); |
| |
| avi_write_counters(s, avi->riff_id); |
| } |
| } |
| put_flush_packet(pb); |
| |
| for (i=0; i<MAX_STREAMS; i++) { |
| for (j=0; j<avi->indexes[i].ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++) |
| av_free(avi->indexes[i].cluster[j]); |
| av_free(avi->indexes[i].cluster); |
| avi->indexes[i].cluster = NULL; |
| avi->indexes[i].ents_allocated = avi->indexes[i].entry = 0; |
| } |
| |
| return res; |
| } |
| |
| AVOutputFormat avi_muxer = { |
| "avi", |
| NULL_IF_CONFIG_SMALL("AVI format"), |
| "video/x-msvideo", |
| "avi", |
| sizeof(AVIContext), |
| CODEC_ID_MP2, |
| CODEC_ID_MPEG4, |
| avi_write_header, |
| avi_write_packet, |
| avi_write_trailer, |
| .codec_tag= (const AVCodecTag* const []){codec_bmp_tags, codec_wav_tags, 0}, |
| .flags= AVFMT_VARIABLE_FPS, |
| }; |
