/* * 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) */ #ifdef CONFIG_AVI_MUXER typedef struct AVIIentry { unsigned int flags, pos, len; } AVIIentry; #define AVI_INDEX_CLUSTER_SIZE 16384 typedef struct AVIIndex { offset_t indx_start; int entry; int ents_allocated; AVIIentry** cluster; } AVIIndex; typedef struct { offset_t riff_start, movi_list, odml_list; offset_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 offset_t avi_start_new_riff(AVIContext *avi, ByteIOContext *pb, const char* riff_tag, const char* list_tag) { offset_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 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; offset_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; offset_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) { av_free(avi); 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); } 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_tag(pb, "INAM", s->title); avi_write_info_tag(pb, "IART", s->author); avi_write_info_tag(pb, "ICOP", s->copyright); avi_write_info_tag(pb, "ICMT", s->comment); avi_write_info_tag(pb, "IPRD", s->album); avi_write_info_tag(pb, "IGNR", s->genre); if (s->track) { char str_track[4]; snprintf(str_track, 4, "%d", s->track); avi_write_info_tag(pb, "IPRT", str_track); } 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++) { offset_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; offset_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; offset_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", "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*[]){codec_bmp_tags, codec_wav_tags, 0}, }; #endif //CONFIG_AVI_MUXER