/* * 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 "avio_internal.h" #include "riff.h" #include "libavutil/intreadwrite.h" #include "libavutil/dict.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; int riff_id; } AVIContext; typedef struct { int64_t frames_hdr_strm; int audio_strm_length; int packet_count; int entry; AVIIndex indexes; } AVIStream ; 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(AVFormatContext *s, AVIOContext *pb, const char* riff_tag, const char* list_tag) { AVIContext *avi= s->priv_data; int64_t loff; int i; avi->riff_id++; for (i=0; i<s->nb_streams; i++){ AVIStream *avist= s->streams[i]->priv_data; avist->indexes.entry = 0; } avi->riff_start = ff_start_tag(pb, "RIFF"); ffio_wfourcc(pb, riff_tag); loff = ff_start_tag(pb, "LIST"); ffio_wfourcc(pb, list_tag); return loff; } static char* avi_stream2fourcc(char* tag, int index, enum AVMediaType type) { tag[0] = '0' + index/10; tag[1] = '0' + index%10; if (type == AVMEDIA_TYPE_VIDEO) { tag[2] = 'd'; tag[3] = 'c'; } else if (type == AVMEDIA_TYPE_SUBTITLE) { // note: this is not an official code tag[2] = 's'; tag[3] = 'b'; } else { tag[2] = 'w'; tag[3] = 'b'; } tag[4] = '\0'; return tag; } static void avi_write_info_tag(AVIOContext *pb, const char *tag, const char *str) { int len = strlen(str); if (len > 0) { len++; ffio_wfourcc(pb, tag); avio_wl32(pb, len); avio_put_str(pb, str); if (len & 1) avio_w8(pb, 0); } } static int avi_write_counters(AVFormatContext* s, int riff_id) { AVIOContext *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 = avio_tell(pb); for(n = 0; n < s->nb_streams; n++) { AVIStream *avist= s->streams[n]->priv_data; assert(avist->frames_hdr_strm); stream = s->streams[n]->codec; avio_seek(pb, avist->frames_hdr_strm, SEEK_SET); ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale); if(au_ssize == 0) { avio_wl32(pb, avist->packet_count); } else { avio_wl32(pb, avist->audio_strm_length / au_ssize); } if(stream->codec_type == AVMEDIA_TYPE_VIDEO) nb_frames = FFMAX(nb_frames, avist->packet_count); } if(riff_id == 1) { assert(avi->frames_hdr_all); avio_seek(pb, avi->frames_hdr_all, SEEK_SET); avio_wl32(pb, nb_frames); } avio_seek(pb, file_size, SEEK_SET); return 0; } static int avi_write_header(AVFormatContext *s) { AVIContext *avi = s->priv_data; AVIOContext *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; AVDictionaryEntry *t = NULL; if (s->nb_streams > AVI_MAX_STREAM_COUNT) { av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n", AVI_MAX_STREAM_COUNT); return -1; } for(n=0;n<s->nb_streams;n++) { s->streams[n]->priv_data= av_mallocz(sizeof(AVIStream)); if(!s->streams[n]->priv_data) return AVERROR(ENOMEM); } /* header list */ avi->riff_id = 0; list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl"); /* avi header */ ffio_wfourcc(pb, "avih"); avio_wl32(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 == AVMEDIA_TYPE_VIDEO) video_enc = stream; } nb_frames = 0; if(video_enc){ avio_wl32(pb, (uint32_t)(INT64_C(1000000) * video_enc->time_base.num / video_enc->time_base.den)); } else { avio_wl32(pb, 0); } avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */ avio_wl32(pb, 0); /* padding */ if (!pb->seekable) avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */ else avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */ avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */ avio_wl32(pb, nb_frames); /* nb frames, filled later */ avio_wl32(pb, 0); /* initial frame */ avio_wl32(pb, s->nb_streams); /* nb streams */ avio_wl32(pb, 1024 * 1024); /* suggested buffer size */ if(video_enc){ avio_wl32(pb, video_enc->width); avio_wl32(pb, video_enc->height); } else { avio_wl32(pb, 0); avio_wl32(pb, 0); } avio_wl32(pb, 0); /* reserved */ avio_wl32(pb, 0); /* reserved */ avio_wl32(pb, 0); /* reserved */ avio_wl32(pb, 0); /* reserved */ /* stream list */ for(i=0;i<n;i++) { AVIStream *avist= s->streams[i]->priv_data; list2 = ff_start_tag(pb, "LIST"); ffio_wfourcc(pb, "strl"); stream = s->streams[i]->codec; /* stream generic header */ strh = ff_start_tag(pb, "strh"); switch(stream->codec_type) { case AVMEDIA_TYPE_SUBTITLE: // XSUB subtitles behave like video tracks, other subtitles // are not (yet) supported. if (stream->codec_id != CODEC_ID_XSUB) { av_log(s, AV_LOG_ERROR, "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n"); return AVERROR_PATCHWELCOME; } case AVMEDIA_TYPE_VIDEO: ffio_wfourcc(pb, "vids"); break; case AVMEDIA_TYPE_AUDIO: ffio_wfourcc(pb, "auds"); break; // case AVMEDIA_TYPE_TEXT : ffio_wfourcc(pb, "txts"); break; case AVMEDIA_TYPE_DATA : ffio_wfourcc(pb, "dats"); break; } if(stream->codec_type == AVMEDIA_TYPE_VIDEO || stream->codec_id == CODEC_ID_XSUB) avio_wl32(pb, stream->codec_tag); else avio_wl32(pb, 1); avio_wl32(pb, 0); /* flags */ avio_wl16(pb, 0); /* priority */ avio_wl16(pb, 0); /* language */ avio_wl32(pb, 0); /* initial frame */ ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale); avio_wl32(pb, au_scale); /* scale */ avio_wl32(pb, au_byterate); /* rate */ av_set_pts_info(s->streams[i], 64, au_scale, au_byterate); avio_wl32(pb, 0); /* start */ avist->frames_hdr_strm = avio_tell(pb); /* remember this offset to fill later */ if (!pb->seekable) avio_wl32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */ else avio_wl32(pb, 0); /* length, XXX: filled later */ /* suggested buffer size */ //FIXME set at the end to largest chunk if(stream->codec_type == AVMEDIA_TYPE_VIDEO) avio_wl32(pb, 1024 * 1024); else if(stream->codec_type == AVMEDIA_TYPE_AUDIO) avio_wl32(pb, 12 * 1024); else avio_wl32(pb, 0); avio_wl32(pb, -1); /* quality */ avio_wl32(pb, au_ssize); /* sample size */ avio_wl32(pb, 0); avio_wl16(pb, stream->width); avio_wl16(pb, stream->height); ff_end_tag(pb, strh); if(stream->codec_type != AVMEDIA_TYPE_DATA){ strf = ff_start_tag(pb, "strf"); switch(stream->codec_type) { case AVMEDIA_TYPE_SUBTITLE: // XSUB subtitles behave like video tracks, other subtitles // are not (yet) supported. if (stream->codec_id != CODEC_ID_XSUB) break; case AVMEDIA_TYPE_VIDEO: ff_put_bmp_header(pb, stream, ff_codec_bmp_tags, 0); break; case AVMEDIA_TYPE_AUDIO: if (ff_put_wav_header(pb, stream) < 0) { return -1; } break; default: return -1; } ff_end_tag(pb, strf); if ((t = av_dict_get(s->streams[i]->metadata, "title", NULL, 0))) { avi_write_info_tag(s->pb, "strn", t->value); t = NULL; } } if (pb->seekable) { 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. */ avist->indexes.entry = avist->indexes.ents_allocated = 0; avist->indexes.indx_start = ff_start_tag(pb, "JUNK"); avio_wl16(pb, 4); /* wLongsPerEntry */ avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */ avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */ avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */ ffio_wfourcc(pb, avi_stream2fourcc(tag, i, stream->codec_type)); /* dwChunkId */ avio_wl64(pb, 0); /* dwReserved[3] avio_wl32(pb, 0); Must be 0. */ for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++) avio_wl64(pb, 0); ff_end_tag(pb, avist->indexes.indx_start); } if( stream->codec_type == AVMEDIA_TYPE_VIDEO && s->streams[i]->sample_aspect_ratio.num>0 && s->streams[i]->sample_aspect_ratio.den>0){ int vprp= ff_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); avio_wl32(pb, 0); //video format = unknown avio_wl32(pb, 0); //video standard= unknown avio_wl32(pb, lrintf(1.0/av_q2d(stream->time_base))); avio_wl32(pb, stream->width ); avio_wl32(pb, stream->height); avio_wl16(pb, den); avio_wl16(pb, num); avio_wl32(pb, stream->width ); avio_wl32(pb, stream->height); avio_wl32(pb, 1); //progressive FIXME avio_wl32(pb, stream->height); avio_wl32(pb, stream->width ); avio_wl32(pb, stream->height); avio_wl32(pb, stream->width ); avio_wl32(pb, 0); avio_wl32(pb, 0); avio_wl32(pb, 0); avio_wl32(pb, 0); ff_end_tag(pb, vprp); } ff_end_tag(pb, list2); } if (pb->seekable) { /* AVI could become an OpenDML one, if it grows beyond 2Gb range */ avi->odml_list = ff_start_tag(pb, "JUNK"); ffio_wfourcc(pb, "odml"); ffio_wfourcc(pb, "dmlh"); avio_wl32(pb, 248); for (i = 0; i < 248; i+= 4) avio_wl32(pb, 0); ff_end_tag(pb, avi->odml_list); } ff_end_tag(pb, list1); list2 = ff_start_tag(pb, "LIST"); ffio_wfourcc(pb, "INFO"); ff_metadata_conv(&s->metadata, ff_avi_metadata_conv, NULL); for (i = 0; *ff_avi_tags[i]; i++) { if ((t = av_dict_get(s->metadata, ff_avi_tags[i], NULL, AV_DICT_MATCH_CASE))) avi_write_info_tag(s->pb, t->key, t->value); } ff_end_tag(pb, list2); /* some padding for easier tag editing */ list2 = ff_start_tag(pb, "JUNK"); for (i = 0; i < 1016; i += 4) avio_wl32(pb, 0); ff_end_tag(pb, list2); avi->movi_list = ff_start_tag(pb, "LIST"); ffio_wfourcc(pb, "movi"); avio_flush(pb); return 0; } static int avi_write_ix(AVFormatContext *s) { AVIOContext *pb = s->pb; AVIContext *avi = s->priv_data; char tag[5]; char ix_tag[] = "ix00"; int i, j; assert(pb->seekable); if (avi->riff_id > AVI_MASTER_INDEX_SIZE) return -1; for (i=0;i<s->nb_streams;i++) { AVIStream *avist= s->streams[i]->priv_data; int64_t ix, pos; avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type); ix_tag[3] = '0' + i; /* Writing AVI OpenDML leaf index chunk */ ix = avio_tell(pb); ffio_wfourcc(pb, ix_tag); /* ix?? */ avio_wl32(pb, avist->indexes.entry * 8 + 24); /* chunk size */ avio_wl16(pb, 2); /* wLongsPerEntry */ avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */ avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */ avio_wl32(pb, avist->indexes.entry); /* nEntriesInUse */ ffio_wfourcc(pb, tag); /* dwChunkId */ avio_wl64(pb, avi->movi_list);/* qwBaseOffset */ avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */ for (j=0; j<avist->indexes.entry; j++) { AVIIentry* ie = avi_get_ientry(&avist->indexes, j); avio_wl32(pb, ie->pos + 8); avio_wl32(pb, ((uint32_t)ie->len & ~0x80000000) | (ie->flags & 0x10 ? 0 : 0x80000000)); } avio_flush(pb); pos = avio_tell(pb); /* Updating one entry in the AVI OpenDML master index */ avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET); ffio_wfourcc(pb, "indx"); /* enabling this entry */ avio_skip(pb, 8); avio_wl32(pb, avi->riff_id); /* nEntriesInUse */ avio_skip(pb, 16*avi->riff_id); avio_wl64(pb, ix); /* qwOffset */ avio_wl32(pb, pos - ix); /* dwSize */ avio_wl32(pb, avist->indexes.entry); /* dwDuration */ avio_seek(pb, pos, SEEK_SET); } return 0; } static int avi_write_idx1(AVFormatContext *s) { AVIOContext *pb = s->pb; AVIContext *avi = s->priv_data; int64_t idx_chunk; int i; char tag[5]; if (pb->seekable) { AVIStream *avist; AVIIentry* ie = 0, *tie; int empty, stream_id = -1; idx_chunk = ff_start_tag(pb, "idx1"); for(i=0; i<s->nb_streams; i++){ avist= s->streams[i]->priv_data; avist->entry=0; } do { empty = 1; for (i=0; i<s->nb_streams; i++) { avist= s->streams[i]->priv_data; if (avist->indexes.entry <= avist->entry) continue; tie = avi_get_ientry(&avist->indexes, avist->entry); if (empty || tie->pos < ie->pos) { ie = tie; stream_id = i; } empty = 0; } if (!empty) { avist= s->streams[stream_id]->priv_data; avi_stream2fourcc(tag, stream_id, s->streams[stream_id]->codec->codec_type); ffio_wfourcc(pb, tag); avio_wl32(pb, ie->flags); avio_wl32(pb, ie->pos); avio_wl32(pb, ie->len); avist->entry++; } } while (!empty); ff_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; AVIOContext *pb = s->pb; unsigned char tag[5]; unsigned int flags=0; const int stream_index= pkt->stream_index; AVIStream *avist= s->streams[stream_index]->priv_data; AVCodecContext *enc= s->streams[stream_index]->codec; int size= pkt->size; // av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %d\n", pkt->dts, avist->packet_count, stream_index); while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avist->packet_count){ 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, avist->packet_count); } avist->packet_count++; // Make sure to put an OpenDML chunk when the file size exceeds the limits if (pb->seekable && (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) { avi_write_ix(s); ff_end_tag(pb, avi->movi_list); if (avi->riff_id == 1) avi_write_idx1(s); ff_end_tag(pb, avi->riff_start); avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi"); } avi_stream2fourcc(tag, stream_index, enc->codec_type); if(pkt->flags&AV_PKT_FLAG_KEY) flags = 0x10; if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { avist->audio_strm_length += size; } if (s->pb->seekable) { AVIIndex* idx = &avist->indexes; 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_f(idx->cluster, sizeof(void*), cl+1); 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 = avio_tell(pb) - avi->movi_list; idx->cluster[cl][id].len = size; idx->entry++; } avio_write(pb, tag, 4); avio_wl32(pb, size); avio_write(pb, pkt->data, size); if (size & 1) avio_w8(pb, 0); avio_flush(pb); return 0; } static int avi_write_trailer(AVFormatContext *s) { AVIContext *avi = s->priv_data; AVIOContext *pb = s->pb; int res = 0; int i, j, n, nb_frames; int64_t file_size; if (pb->seekable){ if (avi->riff_id == 1) { ff_end_tag(pb, avi->movi_list); res = avi_write_idx1(s); ff_end_tag(pb, avi->riff_start); } else { avi_write_ix(s); ff_end_tag(pb, avi->movi_list); ff_end_tag(pb, avi->riff_start); file_size = avio_tell(pb); avio_seek(pb, avi->odml_list - 8, SEEK_SET); ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */ avio_skip(pb, 16); for (n=nb_frames=0;n<s->nb_streams;n++) { AVCodecContext *stream = s->streams[n]->codec; AVIStream *avist= s->streams[n]->priv_data; if (stream->codec_type == AVMEDIA_TYPE_VIDEO) { if (nb_frames < avist->packet_count) nb_frames = avist->packet_count; } else { if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) { nb_frames += avist->packet_count; } } } avio_wl32(pb, nb_frames); avio_seek(pb, file_size, SEEK_SET); avi_write_counters(s, avi->riff_id); } } avio_flush(pb); for (i=0; i<s->nb_streams; i++) { AVIStream *avist= s->streams[i]->priv_data; for (j=0; j<avist->indexes.ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++) av_free(avist->indexes.cluster[j]); av_freep(&avist->indexes.cluster); avist->indexes.ents_allocated = avist->indexes.entry = 0; } return res; } AVOutputFormat ff_avi_muxer = { .name = "avi", .long_name = NULL_IF_CONFIG_SMALL("AVI format"), .mime_type = "video/x-msvideo", .extensions = "avi", .priv_data_size = sizeof(AVIContext), #if CONFIG_LIBMP3LAME_ENCODER .audio_codec = CODEC_ID_MP3, #else .audio_codec = CODEC_ID_AC3, #endif .video_codec = CODEC_ID_MPEG4, .write_header = avi_write_header, .write_packet = avi_write_packet, .write_trailer = avi_write_trailer, .codec_tag= (const AVCodecTag* const []){ff_codec_bmp_tags, ff_codec_wav_tags, 0}, .flags= AVFMT_VARIABLE_FPS, };