static void write_metadata(AVFormatContext *s, unsigned int ts) { AVIOContext *pb = s->pb; FLVContext *flv = s->priv_data; int metadata_count = 0; int64_t metadata_size_pos, data_size, metadata_count_pos; AVDictionaryEntry *tag = NULL; /* write meta_tag */ avio_w8(pb, 18); // tag type META metadata_size_pos = avio_tell(pb); avio_wb24(pb, 0); // size of data part (sum of all parts below) avio_wb24(pb, ts); // timestamp avio_wb32(pb, 0); // reserved /* now data of data_size size */ /* first event name as a string */ avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, "onMetaData"); // 12 bytes /* mixed array (hash) with size and string/type/data tuples */ avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY); metadata_count_pos = avio_tell(pb); metadata_count = 4 * !!flv->video_par + 5 * !!flv->audio_par + 1 * !!flv->data_par + 2; // +2 for duration and file size avio_wb32(pb, metadata_count); put_amf_string(pb, "duration"); flv->duration_offset = avio_tell(pb); // fill in the guessed duration, it'll be corrected later if incorrect put_amf_double(pb, s->duration / AV_TIME_BASE); if (flv->video_par) { put_amf_string(pb, "width"); put_amf_double(pb, flv->video_par->width); put_amf_string(pb, "height"); put_amf_double(pb, flv->video_par->height); put_amf_string(pb, "videodatarate"); put_amf_double(pb, flv->video_par->bit_rate / 1024.0); if (flv->framerate != 0.0) { put_amf_string(pb, "framerate"); put_amf_double(pb, flv->framerate); metadata_count++; } put_amf_string(pb, "videocodecid"); put_amf_double(pb, flv->video_par->codec_tag); } if (flv->audio_par) { put_amf_string(pb, "audiodatarate"); put_amf_double(pb, flv->audio_par->bit_rate / 1024.0); put_amf_string(pb, "audiosamplerate"); put_amf_double(pb, flv->audio_par->sample_rate); put_amf_string(pb, "audiosamplesize"); put_amf_double(pb, flv->audio_par->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16); put_amf_string(pb, "stereo"); put_amf_bool(pb, flv->audio_par->channels == 2); put_amf_string(pb, "audiocodecid"); put_amf_double(pb, flv->audio_par->codec_tag); } if (flv->data_par) { put_amf_string(pb, "datastream"); put_amf_double(pb, 0.0); } while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) { put_amf_string(pb, tag->key); avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, tag->value); metadata_count++; } put_amf_string(pb, "filesize"); flv->filesize_offset = avio_tell(pb); put_amf_double(pb, 0); // delayed write put_amf_string(pb, ""); avio_w8(pb, AMF_END_OF_OBJECT); /* write total size of tag */ data_size = avio_tell(pb) - metadata_size_pos - 10; avio_seek(pb, metadata_count_pos, SEEK_SET); avio_wb32(pb, metadata_count); avio_seek(pb, metadata_size_pos, SEEK_SET); avio_wb24(pb, data_size); avio_skip(pb, data_size + 10 - 3); avio_wb32(pb, data_size + 11); }
static void put_amf_bool(AVIOContext *pb, int b) { avio_w8(pb, AMF_DATA_TYPE_BOOL); avio_w8(pb, !!b); }
static int flv_write_packet(AVFormatContext *s, AVPacket *pkt) { AVIOContext *pb = s->pb; AVCodecContext *enc = s->streams[pkt->stream_index]->codec; FLVContext *flv = s->priv_data; FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data; unsigned ts; int size = pkt->size; uint8_t *data = NULL; int flags, flags_size; // av_log(s, AV_LOG_DEBUG, "type:%d pts: %"PRId64" size:%d\n", // enc->codec_type, timestamp, size); if (enc->codec_id == CODEC_ID_VP6 || enc->codec_id == CODEC_ID_VP6F || enc->codec_id == CODEC_ID_VP6A || enc->codec_id == CODEC_ID_AAC) flags_size = 2; else if (enc->codec_id == CODEC_ID_H264 || enc->codec_id == CODEC_ID_MPEG4) flags_size = 5; else flags_size = 1; switch (enc->codec_type) { case AVMEDIA_TYPE_VIDEO: avio_w8(pb, FLV_TAG_TYPE_VIDEO); flags = enc->codec_tag; if (flags == 0) { av_log(s, AV_LOG_ERROR, "video codec %s not compatible with flv\n", avcodec_get_name(enc->codec_id)); return -1; } flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER; break; case AVMEDIA_TYPE_AUDIO: flags = get_audio_flags(s, enc); av_assert0(size); avio_w8(pb, FLV_TAG_TYPE_AUDIO); break; case AVMEDIA_TYPE_DATA: avio_w8(pb, FLV_TAG_TYPE_META); break; default: return AVERROR(EINVAL); } if (enc->codec_id == CODEC_ID_H264 || enc->codec_id == CODEC_ID_MPEG4) { /* check if extradata looks like mp4 formated */ if (enc->extradata_size > 0 && *(uint8_t*)enc->extradata != 1) if (ff_avc_parse_nal_units_buf(pkt->data, &data, &size) < 0) return -1; } else if (enc->codec_id == CODEC_ID_AAC && pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) { av_log(s, AV_LOG_ERROR, "malformated aac bitstream, use -absf aac_adtstoasc\n"); return -1; } if (flv->delay == AV_NOPTS_VALUE) flv->delay = -pkt->dts; if (pkt->dts < -flv->delay) { av_log(s, AV_LOG_WARNING, "Packets are not in the proper order with respect to DTS\n"); return AVERROR(EINVAL); } ts = pkt->dts + flv->delay; // add delay to force positive dts /* check Speex packet duration */ if (enc->codec_id == CODEC_ID_SPEEX && ts - sc->last_ts > 160) av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than " "8 frames per packet. Adobe Flash " "Player cannot handle this!\n"); if (sc->last_ts < ts) sc->last_ts = ts; avio_wb24(pb, size + flags_size); avio_wb24(pb, ts); avio_w8(pb, (ts >> 24) & 0x7F); // timestamps are 32 bits _signed_ avio_wb24(pb, flv->reserved); if (enc->codec_type == AVMEDIA_TYPE_DATA) { int data_size; int metadata_size_pos = avio_tell(pb); avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, "onTextData"); avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY); avio_wb32(pb, 2); put_amf_string(pb, "type"); avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, "Text"); put_amf_string(pb, "text"); avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, pkt->data); put_amf_string(pb, ""); avio_w8(pb, AMF_END_OF_OBJECT); /* write total size of tag */ data_size = avio_tell(pb) - metadata_size_pos; avio_seek(pb, metadata_size_pos - 10, SEEK_SET); avio_wb24(pb, data_size); avio_seek(pb, data_size + 10 - 3, SEEK_CUR); avio_wb32(pb, data_size + 11); } else { avio_w8(pb,flags); if (enc->codec_id == CODEC_ID_VP6) avio_w8(pb,0); if (enc->codec_id == CODEC_ID_VP6F || enc->codec_id == CODEC_ID_VP6A) avio_w8(pb, enc->extradata_size ? enc->extradata[0] : 0); else if (enc->codec_id == CODEC_ID_AAC) avio_w8(pb,1); // AAC raw else if (enc->codec_id == CODEC_ID_H264 || enc->codec_id == CODEC_ID_MPEG4) { avio_w8(pb,1); // AVC NALU avio_wb24(pb,pkt->pts - pkt->dts); } avio_write(pb, data ? data : pkt->data, size); avio_wb32(pb, size + flags_size + 11); // previous tag size flv->duration = FFMAX(flv->duration, pkt->pts + flv->delay + pkt->duration); } avio_flush(pb); av_free(data); return pb->error; }
static int gxf_write_umf_media_description(AVFormatContext *s) { GXFContext *gxf = s->priv_data; AVIOContext *pb = s->pb; int64_t pos; int i, j; pos = avio_tell(pb); gxf->umf_media_offset = pos - gxf->umf_start_offset; for (i = 0; i <= s->nb_streams; ++i) { GXFStreamContext *sc; int64_t startpos, curpos; if (i == s->nb_streams) sc = &gxf->timecode_track; else sc = s->streams[i]->priv_data; startpos = avio_tell(pb); avio_wl16(pb, 0); /* length */ avio_wl16(pb, sc->media_info); avio_wl16(pb, 0); /* reserved */ avio_wl16(pb, 0); /* reserved */ avio_wl32(pb, gxf->nb_fields); avio_wl32(pb, 0); /* attributes rw, ro */ avio_wl32(pb, 0); /* mark in */ avio_wl32(pb, gxf->nb_fields); /* mark out */ avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN)); avio_wb16(pb, sc->media_info); for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++) avio_w8(pb, 0); avio_wl32(pb, sc->track_type); avio_wl32(pb, sc->sample_rate); avio_wl32(pb, sc->sample_size); avio_wl32(pb, 0); /* reserved */ if (sc == &gxf->timecode_track) gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */ else { AVStream *st = s->streams[i]; switch (st->codec->codec_id) { case CODEC_ID_MPEG1VIDEO: case CODEC_ID_MPEG2VIDEO: gxf_write_umf_media_mpeg(pb, st); break; case CODEC_ID_PCM_S16LE: gxf_write_umf_media_audio(pb, sc); break; case CODEC_ID_DVVIDEO: gxf_write_umf_media_dv(pb, sc); break; } } curpos = avio_tell(pb); avio_seek(pb, startpos, SEEK_SET); avio_wl16(pb, curpos - startpos); avio_seek(pb, curpos, SEEK_SET); } return avio_tell(pb) - pos; }
static int write_packet(AVFormatContext *s, AVPacket *pkt) { WVMuxContext *wc = s->priv_data; AVCodecContext *codec = s->streams[0]->codec; AVIOContext *pb = s->pb; uint64_t size; uint32_t flags; uint32_t left = pkt->size; uint8_t *ptr = pkt->data; int off = codec->channels > 2 ? 4 : 0; /* FIXME: Simplify decoder/demuxer so bellow code can support midstream * change of stream parameters */ wc->duration += pkt->duration; ffio_wfourcc(pb, "wvpk"); if (off) { size = AV_RL32(pkt->data); if (size <= 12) return AVERROR_INVALIDDATA; size -= 12; } else { size = pkt->size; } if (size + off > left) return AVERROR_INVALIDDATA; avio_wl32(pb, size + 12); avio_wl16(pb, 0x410); avio_w8(pb, 0); avio_w8(pb, 0); avio_wl32(pb, -1); avio_wl32(pb, pkt->pts); ptr += off; left -= off; flags = AV_RL32(ptr + 4); avio_write(pb, ptr, size); ptr += size; left -= size; while (!(flags & WV_END_BLOCK) && (left >= 4 + WV_EXTRA_SIZE)) { ffio_wfourcc(pb, "wvpk"); size = AV_RL32(ptr); ptr += 4; left -= 4; if (size < 24 || size - 24 > left) return AVERROR_INVALIDDATA; avio_wl32(pb, size); avio_wl16(pb, 0x410); avio_w8(pb, 0); avio_w8(pb, 0); avio_wl32(pb, -1); avio_wl32(pb, pkt->pts); flags = AV_RL32(ptr + 4); avio_write(pb, ptr, WV_EXTRA_SIZE); ptr += WV_EXTRA_SIZE; left -= WV_EXTRA_SIZE; avio_write(pb, ptr, size - 24); ptr += size - 24; left -= size - 24; } avio_flush(pb); return 0; }
static int ffm_write_header(AVFormatContext *s) { FFMContext *ffm = s->priv_data; AVStream *st; AVIOContext *pb = s->pb; AVCodecContext *codec; int bit_rate, i; ffm->packet_size = FFM_PACKET_SIZE; /* header */ avio_wl32(pb, MKTAG('F', 'F', 'M', '1')); avio_wb32(pb, ffm->packet_size); avio_wb64(pb, 0); /* current write position */ avio_wb32(pb, s->nb_streams); bit_rate = 0; for(i=0;i<s->nb_streams;i++) { st = s->streams[i]; bit_rate += st->codec->bit_rate; } avio_wb32(pb, bit_rate); /* list of streams */ for(i=0;i<s->nb_streams;i++) { st = s->streams[i]; avpriv_set_pts_info(st, 64, 1, 1000000); codec = st->codec; /* generic info */ avio_wb32(pb, codec->codec_id); avio_w8(pb, codec->codec_type); avio_wb32(pb, codec->bit_rate); avio_wb32(pb, codec->flags); avio_wb32(pb, codec->flags2); avio_wb32(pb, codec->debug); /* specific info */ switch(codec->codec_type) { case AVMEDIA_TYPE_VIDEO: avio_wb32(pb, codec->time_base.num); avio_wb32(pb, codec->time_base.den); avio_wb16(pb, codec->width); avio_wb16(pb, codec->height); avio_wb16(pb, codec->gop_size); avio_wb32(pb, codec->pix_fmt); avio_w8(pb, codec->qmin); avio_w8(pb, codec->qmax); avio_w8(pb, codec->max_qdiff); avio_wb16(pb, (int) (codec->qcompress * 10000.0)); avio_wb16(pb, (int) (codec->qblur * 10000.0)); avio_wb32(pb, codec->bit_rate_tolerance); avio_put_str(pb, codec->rc_eq ? codec->rc_eq : "tex^qComp"); avio_wb32(pb, codec->rc_max_rate); avio_wb32(pb, codec->rc_min_rate); avio_wb32(pb, codec->rc_buffer_size); avio_wb64(pb, av_double2int(codec->i_quant_factor)); avio_wb64(pb, av_double2int(codec->b_quant_factor)); avio_wb64(pb, av_double2int(codec->i_quant_offset)); avio_wb64(pb, av_double2int(codec->b_quant_offset)); avio_wb32(pb, codec->dct_algo); avio_wb32(pb, codec->strict_std_compliance); avio_wb32(pb, codec->max_b_frames); avio_wb32(pb, codec->mpeg_quant); avio_wb32(pb, codec->intra_dc_precision); avio_wb32(pb, codec->me_method); avio_wb32(pb, codec->mb_decision); avio_wb32(pb, codec->nsse_weight); avio_wb32(pb, codec->frame_skip_cmp); avio_wb64(pb, av_double2int(codec->rc_buffer_aggressivity)); avio_wb32(pb, codec->codec_tag); avio_w8(pb, codec->thread_count); avio_wb32(pb, codec->coder_type); avio_wb32(pb, codec->me_cmp); avio_wb32(pb, codec->me_subpel_quality); avio_wb32(pb, codec->me_range); avio_wb32(pb, codec->keyint_min); avio_wb32(pb, codec->scenechange_threshold); avio_wb32(pb, codec->b_frame_strategy); avio_wb64(pb, av_double2int(codec->qcompress)); avio_wb64(pb, av_double2int(codec->qblur)); avio_wb32(pb, codec->max_qdiff); avio_wb32(pb, codec->refs); break; case AVMEDIA_TYPE_AUDIO: avio_wb32(pb, codec->sample_rate); avio_wl16(pb, codec->channels); avio_wl16(pb, codec->frame_size); avio_wl16(pb, codec->sample_fmt); break; default: return -1; } if (codec->flags & CODEC_FLAG_GLOBAL_HEADER) { avio_wb32(pb, codec->extradata_size); avio_write(pb, codec->extradata, codec->extradata_size); } } /* flush until end of block reached */ while ((avio_tell(pb) % ffm->packet_size) != 0) avio_w8(pb, 0); avio_flush(pb); /* init packet mux */ ffm->packet_ptr = ffm->packet; ffm->packet_end = ffm->packet + ffm->packet_size - FFM_HEADER_SIZE; av_assert0(ffm->packet_end >= ffm->packet); ffm->frame_offset = 0; ffm->dts = 0; ffm->first_packet = 1; return 0; }
static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index) { AVIOContext *pb = s->pb; int64_t pos; int mpeg = sc->track_type == 4 || sc->track_type == 9; /* track description section */ avio_w8(pb, sc->media_type + 0x80); avio_w8(pb, index + 0xC0); pos = avio_tell(pb); avio_wb16(pb, 0); /* size */ /* media file name */ avio_w8(pb, TRACK_NAME); avio_w8(pb, strlen(ES_NAME_PATTERN) + 3); avio_write(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN) - 1); avio_wb16(pb, sc->media_info); avio_w8(pb, 0); if (!mpeg) { /* auxiliary information */ avio_w8(pb, TRACK_AUX); avio_w8(pb, 8); if (sc->track_type == 3) gxf_write_timecode_auxiliary(pb, sc); else avio_wl64(pb, 0); } /* file system version */ avio_w8(pb, TRACK_VER); avio_w8(pb, 4); avio_wb32(pb, 0); if (mpeg) gxf_write_mpeg_auxiliary(pb, s->streams[index]); /* frame rate */ avio_w8(pb, TRACK_FPS); avio_w8(pb, 4); avio_wb32(pb, sc->frame_rate_index); /* lines per frame */ avio_w8(pb, TRACK_LINES); avio_w8(pb, 4); avio_wb32(pb, sc->lines_index); /* fields per frame */ avio_w8(pb, TRACK_FPF); avio_w8(pb, 4); avio_wb32(pb, sc->fields); return updateSize(pb, pos); }
static int voc_write_trailer(AVFormatContext *s) { avio_w8(s->pb, 0); return 0; }
static void put_amf_byte(AVIOContext *pb, unsigned char abyte) { avio_w8(pb, abyte); }
static int avi_write_packet(AVFormatContext *s, AVPacket *pkt) { unsigned char tag[5]; unsigned int flags = 0; const int stream_index = pkt->stream_index; int size = pkt->size; AVIContext *avi = s->priv_data; AVIOContext *pb = s->pb; AVIStream *avist = s->streams[stream_index]->priv_data; AVCodecContext *enc = s->streams[stream_index]->codec; if (enc->codec_id == AV_CODEC_ID_H264 && enc->codec_tag == MKTAG('H','2','6','4') && pkt->size) { int ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt); if (ret < 0) return ret; } av_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(pkt->dts), avist->packet_count, stream_index); while (enc->block_align == 0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avist->packet_count && enc->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) { AVPacket empty_packet; if (pkt->dts - avist->packet_count > 60000) { av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", pkt->dts - avist->packet_count); return AVERROR(EINVAL); } 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_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(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) { idx->ents_allocated = 0; idx->entry = 0; return AVERROR(ENOMEM); } idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry)); if (!idx->cluster[cl]) return AVERROR(ENOMEM); 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; avist->max_size = FFMAX(avist->max_size, 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); return 0; }
/* returns the size or -1 on error */ int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc, int flags) { int bps, blkalign, bytespersec, frame_size; int hdrsize; int64_t hdrstart = avio_tell(pb); int waveformatextensible; uint8_t temp[256]; uint8_t *riff_extradata = temp; uint8_t *riff_extradata_start = temp; if (!enc->codec_tag || enc->codec_tag > 0xffff) return -1; /* We use the known constant frame size for the codec if known, otherwise * fall back on using AVCodecContext.frame_size, which is not as reliable * for indicating packet duration. */ frame_size = av_get_audio_frame_duration(enc, enc->block_align); waveformatextensible = (enc->channels > 2 && enc->channel_layout) || enc->sample_rate > 48000 || enc->codec_id == AV_CODEC_ID_EAC3 || av_get_bits_per_sample(enc->codec_id) > 16; if (waveformatextensible) avio_wl16(pb, 0xfffe); else avio_wl16(pb, enc->codec_tag); avio_wl16(pb, enc->channels); avio_wl32(pb, enc->sample_rate); if (enc->codec_id == AV_CODEC_ID_ATRAC3 || enc->codec_id == AV_CODEC_ID_G723_1 || enc->codec_id == AV_CODEC_ID_MP2 || enc->codec_id == AV_CODEC_ID_MP3 || enc->codec_id == AV_CODEC_ID_GSM_MS) { bps = 0; } else { if (!(bps = av_get_bits_per_sample(enc->codec_id))) { if (enc->bits_per_coded_sample) bps = enc->bits_per_coded_sample; else bps = 16; // default to 16 } } if (bps != enc->bits_per_coded_sample && enc->bits_per_coded_sample) { av_log(enc, AV_LOG_WARNING, "requested bits_per_coded_sample (%d) " "and actually stored (%d) differ\n", enc->bits_per_coded_sample, bps); } if (enc->codec_id == AV_CODEC_ID_MP2) { blkalign = (144 * enc->bit_rate - 1)/enc->sample_rate + 1; } else if (enc->codec_id == AV_CODEC_ID_MP3) { blkalign = 576 * (enc->sample_rate <= (24000 + 32000)/2 ? 1 : 2); } else if (enc->codec_id == AV_CODEC_ID_AC3) { blkalign = 3840; /* maximum bytes per frame */ } else if (enc->codec_id == AV_CODEC_ID_AAC) { blkalign = 768 * enc->channels; /* maximum bytes per frame */ } else if (enc->codec_id == AV_CODEC_ID_G723_1) { blkalign = 24; } else if (enc->block_align != 0) { /* specified by the codec */ blkalign = enc->block_align; } else blkalign = bps * enc->channels / av_gcd(8, bps); if (enc->codec_id == AV_CODEC_ID_PCM_U8 || enc->codec_id == AV_CODEC_ID_PCM_S24LE || enc->codec_id == AV_CODEC_ID_PCM_S32LE || enc->codec_id == AV_CODEC_ID_PCM_F32LE || enc->codec_id == AV_CODEC_ID_PCM_F64LE || enc->codec_id == AV_CODEC_ID_PCM_S16LE) { bytespersec = enc->sample_rate * blkalign; } else if (enc->codec_id == AV_CODEC_ID_G723_1) { bytespersec = 800; } else { bytespersec = enc->bit_rate / 8; } avio_wl32(pb, bytespersec); /* bytes per second */ avio_wl16(pb, blkalign); /* block align */ avio_wl16(pb, bps); /* bits per sample */ if (enc->codec_id == AV_CODEC_ID_MP3) { bytestream_put_le16(&riff_extradata, 1); /* wID */ bytestream_put_le32(&riff_extradata, 2); /* fdwFlags */ bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */ bytestream_put_le16(&riff_extradata, 1); /* nFramesPerBlock */ bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */ } else if (enc->codec_id == AV_CODEC_ID_MP2) { /* fwHeadLayer */ bytestream_put_le16(&riff_extradata, 2); /* dwHeadBitrate */ bytestream_put_le32(&riff_extradata, enc->bit_rate); /* fwHeadMode */ bytestream_put_le16(&riff_extradata, enc->channels == 2 ? 1 : 8); /* fwHeadModeExt */ bytestream_put_le16(&riff_extradata, 0); /* wHeadEmphasis */ bytestream_put_le16(&riff_extradata, 1); /* fwHeadFlags */ bytestream_put_le16(&riff_extradata, 16); /* dwPTSLow */ bytestream_put_le32(&riff_extradata, 0); /* dwPTSHigh */ bytestream_put_le32(&riff_extradata, 0); } else if (enc->codec_id == AV_CODEC_ID_G723_1) { bytestream_put_le32(&riff_extradata, 0x9ace0002); /* extradata needed for msacm g723.1 codec */ bytestream_put_le32(&riff_extradata, 0xaea2f732); bytestream_put_le16(&riff_extradata, 0xacde); } else if (enc->codec_id == AV_CODEC_ID_GSM_MS || enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) { /* wSamplesPerBlock */ bytestream_put_le16(&riff_extradata, frame_size); } else if (enc->extradata_size) { riff_extradata_start = enc->extradata; riff_extradata = enc->extradata + enc->extradata_size; } /* write WAVEFORMATEXTENSIBLE extensions */ if (waveformatextensible) { int write_channel_mask = !(flags & FF_PUT_WAV_HEADER_SKIP_CHANNELMASK) && (enc->strict_std_compliance < FF_COMPLIANCE_NORMAL || enc->channel_layout < 0x40000); /* 22 is WAVEFORMATEXTENSIBLE size */ avio_wl16(pb, riff_extradata - riff_extradata_start + 22); /* ValidBitsPerSample || SamplesPerBlock || Reserved */ avio_wl16(pb, bps); /* dwChannelMask */ avio_wl32(pb, write_channel_mask ? enc->channel_layout : 0); /* GUID + next 3 */ if (enc->codec_id == AV_CODEC_ID_EAC3) { ff_put_guid(pb, ff_get_codec_guid(enc->codec_id, ff_codec_wav_guids)); } else { avio_wl32(pb, enc->codec_tag); avio_wl32(pb, 0x00100000); avio_wl32(pb, 0xAA000080); avio_wl32(pb, 0x719B3800); } } else if ((flags & FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX) || enc->codec_tag != 0x0001 /* PCM */ || riff_extradata - riff_extradata_start) { /* WAVEFORMATEX */ avio_wl16(pb, riff_extradata - riff_extradata_start); /* cbSize */ } /* else PCMWAVEFORMAT */ avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start); hdrsize = avio_tell(pb) - hdrstart; if (hdrsize & 1) { hdrsize++; avio_w8(pb, 0); } return hdrsize; }
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 *video_enc; AVStream *video_st = NULL; int64_t list1, list2, strh, strf; AVDictionaryEntry *t = NULL; int padding; 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 AVERROR(EINVAL); } 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++) { AVCodecContext *codec = s->streams[n]->codec; bitrate += codec->bit_rate; if (codec->codec_type == AVMEDIA_TYPE_VIDEO) { video_enc = codec; video_st = s->streams[n]; } } nb_frames = 0; // TODO: should be avg_frame_rate if (video_st) avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num / video_st->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++) { AVStream *st = s->streams[i]; AVCodecContext *enc = st->codec; AVIStream *avist = st->priv_data; list2 = ff_start_tag(pb, "LIST"); ffio_wfourcc(pb, "strl"); /* stream generic header */ strh = ff_start_tag(pb, "strh"); switch (enc->codec_type) { case AVMEDIA_TYPE_SUBTITLE: // XSUB subtitles behave like video tracks, other subtitles // are not (yet) supported. if (enc->codec_id != AV_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 (enc->codec_type == AVMEDIA_TYPE_VIDEO || enc->codec_id == AV_CODEC_ID_XSUB) avio_wl32(pb, enc->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(st, &au_byterate, &au_ssize, &au_scale); if ( enc->codec_type == AVMEDIA_TYPE_VIDEO && enc->codec_id != AV_CODEC_ID_XSUB && au_byterate > 1000LL*au_scale) { au_byterate = 600; au_scale = 1; } avpriv_set_pts_info(st, 64, au_scale, au_byterate); if (enc->codec_id == AV_CODEC_ID_XSUB) au_scale = au_byterate = 0; avio_wl32(pb, au_scale); /* scale */ avio_wl32(pb, au_byterate); /* rate */ avio_wl32(pb, 0); /* start */ /* remember this offset to fill later */ avist->frames_hdr_strm = avio_tell(pb); if (!pb->seekable) /* FIXME: this may be broken, but who cares */ avio_wl32(pb, AVI_MAX_RIFF_SIZE); else avio_wl32(pb, 0); /* length, XXX: filled later */ /* suggested buffer size, is set to largest chunk size in avi_write_trailer */ if (enc->codec_type == AVMEDIA_TYPE_VIDEO) avio_wl32(pb, 1024 * 1024); else if (enc->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, enc->width); avio_wl16(pb, enc->height); ff_end_tag(pb, strh); if (enc->codec_type != AVMEDIA_TYPE_DATA) { int ret; enum AVPixelFormat pix_fmt; strf = ff_start_tag(pb, "strf"); switch (enc->codec_type) { case AVMEDIA_TYPE_SUBTITLE: /* XSUB subtitles behave like video tracks, other subtitles * are not (yet) supported. */ if (enc->codec_id != AV_CODEC_ID_XSUB) break; case AVMEDIA_TYPE_VIDEO: /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */ if ( !enc->codec_tag && enc->codec_id == AV_CODEC_ID_RAWVIDEO && enc->pix_fmt == AV_PIX_FMT_RGB555LE && enc->bits_per_coded_sample == 15) enc->bits_per_coded_sample = 16; ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 0, 0); pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi, enc->bits_per_coded_sample); if ( !enc->codec_tag && enc->codec_id == AV_CODEC_ID_RAWVIDEO && enc->pix_fmt != pix_fmt && enc->pix_fmt != AV_PIX_FMT_NONE) av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n", av_get_pix_fmt_name(enc->pix_fmt)); break; case AVMEDIA_TYPE_AUDIO: if ((ret = ff_put_wav_header(pb, enc, 0)) < 0) return ret; break; default: av_log(s, AV_LOG_ERROR, "Invalid or not supported codec type '%s' found in the input\n", (char *)av_x_if_null(av_get_media_type_string(enc->codec_type), "?")); return AVERROR(EINVAL); } ff_end_tag(pb, strf); if ((t = av_dict_get(st->metadata, "title", NULL, 0))) { ff_riff_write_info_tag(s->pb, "strn", t->value); t = NULL; } if (enc->codec_id == AV_CODEC_ID_XSUB && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) { const char* langstr = av_convert_lang_to(t->value, AV_LANG_ISO639_1); t = NULL; if (langstr) { char* str = av_asprintf("Subtitle - %s-xx;02", langstr); ff_riff_write_info_tag(s->pb, "strn", str); av_free(str); } } } 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, enc->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 (enc->codec_type == AVMEDIA_TYPE_VIDEO && st->sample_aspect_ratio.num > 0 && st->sample_aspect_ratio.den > 0) { int vprp = ff_start_tag(pb, "vprp"); AVRational dar = av_mul_q(st->sample_aspect_ratio, (AVRational) { enc->width, enc->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 // TODO: should be avg_frame_rate avio_wl32(pb, lrintf(1.0 / av_q2d(st->time_base))); avio_wl32(pb, enc->width); avio_wl32(pb, enc->height); avio_wl16(pb, den); avio_wl16(pb, num); avio_wl32(pb, enc->width); avio_wl32(pb, enc->height); avio_wl32(pb, 1); // progressive FIXME avio_wl32(pb, enc->height); avio_wl32(pb, enc->width); avio_wl32(pb, enc->height); avio_wl32(pb, enc->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); ff_riff_write_info(s); padding = s->metadata_header_padding; if (padding < 0) padding = 1016; /* some padding for easier tag editing */ if (padding) { list2 = ff_start_tag(pb, "JUNK"); for (i = padding; i > 0; 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 flv_write_packet(AVFormatContext *s, AVPacket *pkt) { AVIOContext *pb = s->pb; AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar; FLVContext *flv = s->priv_data; FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data; unsigned ts; int size = pkt->size; uint8_t *data = NULL; int flags = 0, flags_size; if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A || par->codec_id == AV_CODEC_ID_AAC) flags_size = 2; else if (par->codec_id == AV_CODEC_ID_H264) flags_size = 5; else flags_size = 1; if (flv->delay == AV_NOPTS_VALUE) flv->delay = -pkt->dts; if (pkt->dts < -flv->delay) { av_log(s, AV_LOG_WARNING, "Packets are not in the proper order with respect to DTS\n"); return AVERROR(EINVAL); } ts = pkt->dts + flv->delay; // add delay to force positive dts if (s->event_flags & AVSTREAM_EVENT_FLAG_METADATA_UPDATED) { write_metadata(s, ts); s->event_flags &= ~AVSTREAM_EVENT_FLAG_METADATA_UPDATED; } switch (par->codec_type) { case AVMEDIA_TYPE_VIDEO: avio_w8(pb, FLV_TAG_TYPE_VIDEO); flags = ff_codec_get_tag(flv_video_codec_ids, par->codec_id); flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER; break; case AVMEDIA_TYPE_AUDIO: flags = get_audio_flags(s, par); assert(size); avio_w8(pb, FLV_TAG_TYPE_AUDIO); break; case AVMEDIA_TYPE_DATA: avio_w8(pb, FLV_TAG_TYPE_META); break; default: return AVERROR(EINVAL); } if (par->codec_id == AV_CODEC_ID_H264) /* check if extradata looks like MP4 */ if (par->extradata_size > 0 && *(uint8_t*)par->extradata != 1) if (ff_avc_parse_nal_units_buf(pkt->data, &data, &size) < 0) return -1; /* check Speex packet duration */ if (par->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160) av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than " "8 frames per packet. Adobe Flash " "Player cannot handle this!\n"); if (sc->last_ts < ts) sc->last_ts = ts; avio_wb24(pb, size + flags_size); avio_wb24(pb, ts); avio_w8(pb, (ts >> 24) & 0x7F); // timestamps are 32 bits _signed_ avio_wb24(pb, flv->reserved); if (par->codec_type == AVMEDIA_TYPE_DATA) { int data_size; int64_t metadata_size_pos = avio_tell(pb); avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, "onTextData"); avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY); avio_wb32(pb, 2); put_amf_string(pb, "type"); avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, "Text"); put_amf_string(pb, "text"); avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, pkt->data); put_amf_string(pb, ""); avio_w8(pb, AMF_END_OF_OBJECT); /* write total size of tag */ data_size = avio_tell(pb) - metadata_size_pos; avio_seek(pb, metadata_size_pos - 10, SEEK_SET); avio_wb24(pb, data_size); avio_seek(pb, data_size + 10 - 3, SEEK_CUR); avio_wb32(pb, data_size + 11); } else { avio_w8(pb,flags); if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A) { if (par->extradata_size) avio_w8(pb, par->extradata[0]); else avio_w8(pb, ((FFALIGN(par->width, 16) - par->width) << 4) | (FFALIGN(par->height, 16) - par->height)); } else if (par->codec_id == AV_CODEC_ID_AAC) avio_w8(pb, 1); // AAC raw else if (par->codec_id == AV_CODEC_ID_H264) { avio_w8(pb, 1); // AVC NALU avio_wb24(pb, pkt->pts - pkt->dts); } avio_write(pb, data ? data : pkt->data, size); avio_wb32(pb, size + flags_size + 11); // previous tag size flv->duration = FFMAX(flv->duration, pkt->pts + flv->delay + pkt->duration); } av_free(data); return pb->error; }
static int flv_write_header(AVFormatContext *s) { int i; AVIOContext *pb = s->pb; FLVContext *flv = s->priv_data; int64_t data_size; for (i = 0; i < s->nb_streams; i++) { AVCodecParameters *par = s->streams[i]->codecpar; FLVStreamContext *sc; switch (par->codec_type) { case AVMEDIA_TYPE_VIDEO: if (s->streams[i]->avg_frame_rate.den && s->streams[i]->avg_frame_rate.num) { flv->framerate = av_q2d(s->streams[i]->avg_frame_rate); } if (flv->video_par) { av_log(s, AV_LOG_ERROR, "at most one video stream is supported in flv\n"); return AVERROR(EINVAL); } flv->video_par = par; if (!ff_codec_get_tag(flv_video_codec_ids, par->codec_id)) return unsupported_codec(s, "Video", par->codec_id); break; case AVMEDIA_TYPE_AUDIO: if (flv->audio_par) { av_log(s, AV_LOG_ERROR, "at most one audio stream is supported in flv\n"); return AVERROR(EINVAL); } flv->audio_par = par; if (get_audio_flags(s, par) < 0) return unsupported_codec(s, "Audio", par->codec_id); break; case AVMEDIA_TYPE_DATA: if (par->codec_id != AV_CODEC_ID_TEXT) return unsupported_codec(s, "Data", par->codec_id); flv->data_par = par; break; default: av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n"); return -1; } avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */ sc = av_mallocz(sizeof(FLVStreamContext)); if (!sc) return AVERROR(ENOMEM); s->streams[i]->priv_data = sc; sc->last_ts = -1; } flv->delay = AV_NOPTS_VALUE; avio_write(pb, "FLV", 3); avio_w8(pb, 1); avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!flv->audio_par + FLV_HEADER_FLAG_HASVIDEO * !!flv->video_par); avio_wb32(pb, 9); avio_wb32(pb, 0); for (i = 0; i < s->nb_streams; i++) if (s->streams[i]->codecpar->codec_tag == 5) { avio_w8(pb, 8); // message type avio_wb24(pb, 0); // include flags avio_wb24(pb, 0); // time stamp avio_wb32(pb, 0); // reserved avio_wb32(pb, 11); // size flv->reserved = 5; } write_metadata(s, 0); for (i = 0; i < s->nb_streams; i++) { AVCodecParameters *par = s->streams[i]->codecpar; if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264) { int64_t pos; avio_w8(pb, par->codec_type == AVMEDIA_TYPE_VIDEO ? FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO); avio_wb24(pb, 0); // size patched later avio_wb24(pb, 0); // ts avio_w8(pb, 0); // ts ext avio_wb24(pb, 0); // streamid pos = avio_tell(pb); if (par->codec_id == AV_CODEC_ID_AAC) { avio_w8(pb, get_audio_flags(s, par)); avio_w8(pb, 0); // AAC sequence header avio_write(pb, par->extradata, par->extradata_size); } else { avio_w8(pb, par->codec_tag | FLV_FRAME_KEY); // flags avio_w8(pb, 0); // AVC sequence header avio_wb24(pb, 0); // composition time ff_isom_write_avcc(pb, par->extradata, par->extradata_size); } data_size = avio_tell(pb) - pos; avio_seek(pb, -data_size - 10, SEEK_CUR); avio_wb24(pb, data_size); avio_skip(pb, data_size + 10 - 3); avio_wb32(pb, data_size + 11); // previous tag size } } return 0; }
/* GIF header */ static int gif_image_write_header(AVIOContext *pb, int width, int height, int loop_count, uint32_t *palette) { int i; unsigned int v; avio_write(pb, "GIF", 3); avio_write(pb, "89a", 3); avio_wl16(pb, width); avio_wl16(pb, height); avio_w8(pb, 0xf7); /* flags: global clut, 256 entries */ avio_w8(pb, 0x1f); /* background color index */ avio_w8(pb, 0); /* aspect ratio */ /* the global palette */ if (!palette) { avio_write(pb, (const unsigned char *)gif_clut, 216*3); for(i=0;i<((256-216)*3);i++) avio_w8(pb, 0); } else { for(i=0;i<256;i++) { v = palette[i]; avio_w8(pb, (v >> 16) & 0xff); avio_w8(pb, (v >> 8) & 0xff); avio_w8(pb, (v) & 0xff); } } /* update: this is the 'NETSCAPE EXTENSION' that allows for looped animated gif see http://members.aol.com/royalef/gifabout.htm#net-extension byte 1 : 33 (hex 0x21) GIF Extension code byte 2 : 255 (hex 0xFF) Application Extension Label byte 3 : 11 (hex (0x0B) Length of Application Block (eleven bytes of data to follow) bytes 4 to 11 : "NETSCAPE" bytes 12 to 14 : "2.0" byte 15 : 3 (hex 0x03) Length of Data Sub-Block (three bytes of data to follow) byte 16 : 1 (hex 0x01) bytes 17 to 18 : 0 to 65535, an unsigned integer in lo-hi byte format. This indicate the number of iterations the loop should be executed. bytes 19 : 0 (hex 0x00) a Data Sub-block Terminator */ /* application extension header */ #ifdef GIF_ADD_APP_HEADER if (loop_count >= 0 && loop_count <= 65535) { avio_w8(pb, 0x21); avio_w8(pb, 0xff); avio_w8(pb, 0x0b); avio_write(pb, "NETSCAPE2.0", sizeof("NETSCAPE2.0") - 1); // bytes 4 to 14 avio_w8(pb, 0x03); // byte 15 avio_w8(pb, 0x01); // byte 16 avio_wl16(pb, (uint16_t)loop_count); avio_w8(pb, 0x00); // byte 19 } #endif return 0; }
static void put_amf_dword_array(AVIOContext *pb, uint32_t dw) { avio_w8(pb, AMF_DATA_TYPE_ARRAY); avio_wb32(pb, dw); }
static int gif_image_write_image(AVIOContext *pb, int x1, int y1, int width, int height, const uint8_t *buf, int linesize, int pix_fmt) { PutBitContext p; uint8_t buffer[200]; /* 100 * 9 / 8 = 113 */ int i, left, w, v; const uint8_t *ptr; /* image block */ avio_w8(pb, 0x2c); avio_wl16(pb, x1); avio_wl16(pb, y1); avio_wl16(pb, width); avio_wl16(pb, height); avio_w8(pb, 0x00); /* flags */ /* no local clut */ avio_w8(pb, 0x08); left= width * height; init_put_bits(&p, buffer, 130); /* * the thing here is the bitstream is written as little packets, with a size byte before * but it's still the same bitstream between packets (no flush !) */ ptr = buf; w = width; while(left>0) { put_bits(&p, 9, 0x0100); /* clear code */ for(i=(left<GIF_CHUNKS)?left:GIF_CHUNKS;i;i--) { if (pix_fmt == PIX_FMT_RGB24) { v = gif_clut_index(ptr[0], ptr[1], ptr[2]); ptr+=3; } else { v = *ptr++; } put_bits(&p, 9, v); if (--w == 0) { w = width; buf += linesize; ptr = buf; } } if(left<=GIF_CHUNKS) { put_bits(&p, 9, 0x101); /* end of stream */ flush_put_bits(&p); } if(put_bits_ptr(&p) - p.buf > 0) { avio_w8(pb, put_bits_ptr(&p) - p.buf); /* byte count of the packet */ avio_write(pb, p.buf, put_bits_ptr(&p) - p.buf); /* the actual buffer */ p.buf_ptr = p.buf; /* dequeue the bytes off the bitstream */ } left-=GIF_CHUNKS; } avio_w8(pb, 0x00); /* end of image block */ return 0; }
static void write_metadata(AVFormatContext *s, unsigned int ts) { AVIOContext *pb = s->pb; FLVContext *flv = s->priv_data; int write_duration_filesize = !(flv->flags & FLV_NO_DURATION_FILESIZE); int metadata_count = 0; int64_t metadata_count_pos; AVDictionaryEntry *tag = NULL; /* write meta_tag */ avio_w8(pb, FLV_TAG_TYPE_META); // tag type META flv->metadata_size_pos = avio_tell(pb); avio_wb24(pb, 0); // size of data part (sum of all parts below) avio_wb24(pb, ts); // timestamp avio_wb32(pb, 0); // reserved /* now data of data_size size */ /* first event name as a string */ avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, "onMetaData"); // 12 bytes /* mixed array (hash) with size and string/type/data tuples */ avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY); metadata_count_pos = avio_tell(pb); metadata_count = 4 * !!flv->video_par + 5 * !!flv->audio_par + 1 * !!flv->data_par; if (write_duration_filesize) { metadata_count += 2; // +2 for duration and file size } avio_wb32(pb, metadata_count); if (write_duration_filesize) { put_amf_string(pb, "duration"); flv->duration_offset = avio_tell(pb); // fill in the guessed duration, it'll be corrected later if incorrect put_amf_double(pb, s->duration / AV_TIME_BASE); } if (flv->video_par) { put_amf_string(pb, "width"); put_amf_double(pb, flv->video_par->width); put_amf_string(pb, "height"); put_amf_double(pb, flv->video_par->height); put_amf_string(pb, "videodatarate"); put_amf_double(pb, flv->video_par->bit_rate / 1024.0); if (flv->framerate != 0.0) { put_amf_string(pb, "framerate"); put_amf_double(pb, flv->framerate); metadata_count++; } put_amf_string(pb, "videocodecid"); put_amf_double(pb, flv->video_par->codec_tag); } if (flv->audio_par) { put_amf_string(pb, "audiodatarate"); put_amf_double(pb, flv->audio_par->bit_rate / 1024.0); put_amf_string(pb, "audiosamplerate"); put_amf_double(pb, flv->audio_par->sample_rate); put_amf_string(pb, "audiosamplesize"); put_amf_double(pb, flv->audio_par->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16); put_amf_string(pb, "stereo"); put_amf_bool(pb, flv->audio_par->channels == 2); put_amf_string(pb, "audiocodecid"); put_amf_double(pb, flv->audio_par->codec_tag); } if (flv->data_par) { put_amf_string(pb, "datastream"); put_amf_double(pb, 0.0); } ff_standardize_creation_time(s); while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) { if( !strcmp(tag->key, "width") ||!strcmp(tag->key, "height") ||!strcmp(tag->key, "videodatarate") ||!strcmp(tag->key, "framerate") ||!strcmp(tag->key, "videocodecid") ||!strcmp(tag->key, "audiodatarate") ||!strcmp(tag->key, "audiosamplerate") ||!strcmp(tag->key, "audiosamplesize") ||!strcmp(tag->key, "stereo") ||!strcmp(tag->key, "audiocodecid") ||!strcmp(tag->key, "duration") ||!strcmp(tag->key, "onMetaData") ||!strcmp(tag->key, "datasize") ||!strcmp(tag->key, "lasttimestamp") ||!strcmp(tag->key, "totalframes") ||!strcmp(tag->key, "hasAudio") ||!strcmp(tag->key, "hasVideo") ||!strcmp(tag->key, "hasCuePoints") ||!strcmp(tag->key, "hasMetadata") ||!strcmp(tag->key, "hasKeyframes") ){ av_log(s, AV_LOG_DEBUG, "Ignoring metadata for %s\n", tag->key); continue; } put_amf_string(pb, tag->key); avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, tag->value); metadata_count++; } if (write_duration_filesize) { put_amf_string(pb, "filesize"); flv->filesize_offset = avio_tell(pb); put_amf_double(pb, 0); // delayed write } if (flv->flags & FLV_ADD_KEYFRAME_INDEX) { flv->acurframeindex = 0; flv->keyframe_index_size = 0; put_amf_string(pb, "hasVideo"); put_amf_bool(pb, !!flv->video_par); metadata_count++; put_amf_string(pb, "hasKeyframes"); put_amf_bool(pb, 1); metadata_count++; put_amf_string(pb, "hasAudio"); put_amf_bool(pb, !!flv->audio_par); metadata_count++; put_amf_string(pb, "hasMetadata"); put_amf_bool(pb, 1); metadata_count++; put_amf_string(pb, "canSeekToEnd"); put_amf_bool(pb, 1); metadata_count++; put_amf_string(pb, "datasize"); flv->datasize_offset = avio_tell(pb); flv->datasize = 0; put_amf_double(pb, flv->datasize); metadata_count++; put_amf_string(pb, "videosize"); flv->videosize_offset = avio_tell(pb); flv->videosize = 0; put_amf_double(pb, flv->videosize); metadata_count++; put_amf_string(pb, "audiosize"); flv->audiosize_offset = avio_tell(pb); flv->audiosize = 0; put_amf_double(pb, flv->audiosize); metadata_count++; put_amf_string(pb, "lasttimestamp"); flv->lasttimestamp_offset = avio_tell(pb); flv->lasttimestamp = 0; put_amf_double(pb, 0); metadata_count++; put_amf_string(pb, "lastkeyframetimestamp"); flv->lastkeyframetimestamp_offset = avio_tell(pb); flv->lastkeyframetimestamp = 0; put_amf_double(pb, 0); metadata_count++; put_amf_string(pb, "lastkeyframelocation"); flv->lastkeyframelocation_offset = avio_tell(pb); flv->lastkeyframelocation = 0; put_amf_double(pb, 0); metadata_count++; put_amf_string(pb, "keyframes"); put_amf_byte(pb, AMF_DATA_TYPE_OBJECT); metadata_count++; flv->keyframes_info_offset = avio_tell(pb); } put_amf_string(pb, ""); avio_w8(pb, AMF_END_OF_OBJECT); /* write total size of tag */ flv->metadata_totalsize = avio_tell(pb) - flv->metadata_size_pos - 10; avio_seek(pb, metadata_count_pos, SEEK_SET); avio_wb32(pb, metadata_count); avio_seek(pb, flv->metadata_size_pos, SEEK_SET); avio_wb24(pb, flv->metadata_totalsize); avio_skip(pb, flv->metadata_totalsize + 10 - 3); flv->metadata_totalsize_pos = avio_tell(pb); avio_wb32(pb, flv->metadata_totalsize + 11); }
static void gxf_write_padding(AVIOContext *pb, int64_t to_pad) { for (; to_pad > 0; to_pad--) { avio_w8(pb, 0); } }
static void flv_write_codec_header(AVFormatContext* s, AVCodecParameters* par) { int64_t data_size; AVIOContext *pb = s->pb; FLVContext *flv = s->priv_data; if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) { int64_t pos; avio_w8(pb, par->codec_type == AVMEDIA_TYPE_VIDEO ? FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO); avio_wb24(pb, 0); // size patched later avio_wb24(pb, 0); // ts avio_w8(pb, 0); // ts ext avio_wb24(pb, 0); // streamid pos = avio_tell(pb); if (par->codec_id == AV_CODEC_ID_AAC) { avio_w8(pb, get_audio_flags(s, par)); avio_w8(pb, 0); // AAC sequence header if (!par->extradata_size && (flv->flags & FLV_AAC_SEQ_HEADER_DETECT)) { PutBitContext pbc; int samplerate_index; int channels = flv->audio_par->channels - (flv->audio_par->channels == 8 ? 1 : 0); uint8_t data[2]; for (samplerate_index = 0; samplerate_index < 16; samplerate_index++) if (flv->audio_par->sample_rate == mpeg4audio_sample_rates[samplerate_index]) break; init_put_bits(&pbc, data, sizeof(data)); put_bits(&pbc, 5, flv->audio_par->profile + 1); //profile put_bits(&pbc, 4, samplerate_index); //sample rate index put_bits(&pbc, 4, channels); put_bits(&pbc, 1, 0); //frame length - 1024 samples put_bits(&pbc, 1, 0); //does not depend on core coder put_bits(&pbc, 1, 0); //is not extension flush_put_bits(&pbc); avio_w8(pb, data[0]); avio_w8(pb, data[1]); av_log(s, AV_LOG_WARNING, "AAC sequence header: %02x %02x.\n", data[0], data[1]); } avio_write(pb, par->extradata, par->extradata_size); } else { avio_w8(pb, par->codec_tag | FLV_FRAME_KEY); // flags avio_w8(pb, 0); // AVC sequence header avio_wb24(pb, 0); // composition time ff_isom_write_avcc(pb, par->extradata, par->extradata_size); } data_size = avio_tell(pb) - pos; avio_seek(pb, -data_size - 10, SEEK_CUR); avio_wb24(pb, data_size); avio_skip(pb, data_size + 10 - 3); avio_wb32(pb, data_size + 11); // previous tag size } }
static int gxf_write_material_data_section(AVFormatContext *s) { GXFContext *gxf = s->priv_data; AVIOContext *pb = s->pb; int64_t pos; int len; const char *filename = strrchr(s->filename, '/'); pos = avio_tell(pb); avio_wb16(pb, 0); /* size */ /* name */ if (filename) filename++; else filename = s->filename; len = strlen(filename); avio_w8(pb, MAT_NAME); avio_w8(pb, strlen(SERVER_PATH) + len + 1); avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1); avio_write(pb, filename, len); avio_w8(pb, 0); /* first field */ avio_w8(pb, MAT_FIRST_FIELD); avio_w8(pb, 4); avio_wb32(pb, 0); /* last field */ avio_w8(pb, MAT_LAST_FIELD); avio_w8(pb, 4); avio_wb32(pb, gxf->nb_fields); /* reserved */ avio_w8(pb, MAT_MARK_IN); avio_w8(pb, 4); avio_wb32(pb, 0); avio_w8(pb, MAT_MARK_OUT); avio_w8(pb, 4); avio_wb32(pb, gxf->nb_fields); /* estimated size */ avio_w8(pb, MAT_SIZE); avio_w8(pb, 4); avio_wb32(pb, avio_size(pb) / 1024); return updateSize(pb, pos); }
static int flv_write_header(AVFormatContext *s) { int i; AVIOContext *pb = s->pb; FLVContext *flv = s->priv_data; for (i = 0; i < s->nb_streams; i++) { AVCodecParameters *par = s->streams[i]->codecpar; FLVStreamContext *sc; switch (par->codec_type) { case AVMEDIA_TYPE_VIDEO: if (s->streams[i]->avg_frame_rate.den && s->streams[i]->avg_frame_rate.num) { flv->framerate = av_q2d(s->streams[i]->avg_frame_rate); } if (flv->video_par) { av_log(s, AV_LOG_ERROR, "at most one video stream is supported in flv\n"); return AVERROR(EINVAL); } flv->video_par = par; if (!ff_codec_get_tag(flv_video_codec_ids, par->codec_id)) return unsupported_codec(s, "Video", par->codec_id); if (par->codec_id == AV_CODEC_ID_MPEG4 || par->codec_id == AV_CODEC_ID_H263) { int error = s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL; av_log(s, error ? AV_LOG_ERROR : AV_LOG_WARNING, "Codec %s is not supported in the official FLV specification,\n", avcodec_get_name(par->codec_id)); if (error) { av_log(s, AV_LOG_ERROR, "use vstrict=-1 / -strict -1 to use it anyway.\n"); return AVERROR(EINVAL); } } else if (par->codec_id == AV_CODEC_ID_VP6) { av_log(s, AV_LOG_WARNING, "Muxing VP6 in flv will produce flipped video on playback.\n"); } break; case AVMEDIA_TYPE_AUDIO: if (flv->audio_par) { av_log(s, AV_LOG_ERROR, "at most one audio stream is supported in flv\n"); return AVERROR(EINVAL); } flv->audio_par = par; if (get_audio_flags(s, par) < 0) return unsupported_codec(s, "Audio", par->codec_id); if (par->codec_id == AV_CODEC_ID_PCM_S16BE) av_log(s, AV_LOG_WARNING, "16-bit big-endian audio in flv is valid but most likely unplayable (hardware dependent); use s16le\n"); break; case AVMEDIA_TYPE_DATA: if (par->codec_id != AV_CODEC_ID_TEXT && par->codec_id != AV_CODEC_ID_NONE) return unsupported_codec(s, "Data", par->codec_id); flv->data_par = par; break; case AVMEDIA_TYPE_SUBTITLE: if (par->codec_id != AV_CODEC_ID_TEXT) { av_log(s, AV_LOG_ERROR, "Subtitle codec '%s' for stream %d is not compatible with FLV\n", avcodec_get_name(par->codec_id), i); return AVERROR_INVALIDDATA; } flv->data_par = par; break; default: av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n", av_get_media_type_string(par->codec_type), i); return AVERROR(EINVAL); } avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */ sc = av_mallocz(sizeof(FLVStreamContext)); if (!sc) return AVERROR(ENOMEM); s->streams[i]->priv_data = sc; sc->last_ts = -1; } flv->delay = AV_NOPTS_VALUE; avio_write(pb, "FLV", 3); avio_w8(pb, 1); avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!flv->audio_par + FLV_HEADER_FLAG_HASVIDEO * !!flv->video_par); avio_wb32(pb, 9); avio_wb32(pb, 0); for (i = 0; i < s->nb_streams; i++) if (s->streams[i]->codecpar->codec_tag == 5) { avio_w8(pb, 8); // message type avio_wb24(pb, 0); // include flags avio_wb24(pb, 0); // time stamp avio_wb32(pb, 0); // reserved avio_wb32(pb, 11); // size flv->reserved = 5; } if (flv->flags & FLV_NO_METADATA) { pb->seekable = 0; } else { write_metadata(s, 0); } for (i = 0; i < s->nb_streams; i++) { flv_write_codec_header(s, s->streams[i]->codecpar); } flv->datastart_offset = avio_tell(pb); return 0; }
/* write the header (used two times if non streamed) */ static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size) { ASFContext *asf = s->priv_data; AVIOContext *pb = s->pb; AVMetadataTag *tags[5]; int header_size, n, extra_size, extra_size2, wav_extra_size, file_time; int has_title; int metadata_count; AVCodecContext *enc; int64_t header_offset, cur_pos, hpos; int bit_rate; int64_t duration; ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL); tags[0] = av_metadata_get(s->metadata, "title" , NULL, 0); tags[1] = av_metadata_get(s->metadata, "author" , NULL, 0); tags[2] = av_metadata_get(s->metadata, "copyright", NULL, 0); tags[3] = av_metadata_get(s->metadata, "comment" , NULL, 0); tags[4] = av_metadata_get(s->metadata, "rating" , NULL, 0); duration = asf->duration + PREROLL_TIME * 10000; has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4]; metadata_count = s->metadata ? s->metadata->count : 0; bit_rate = 0; for(n=0;n<s->nb_streams;n++) { enc = s->streams[n]->codec; av_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */ bit_rate += enc->bit_rate; } if (asf->is_streamed) { put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */ } put_guid(pb, &ff_asf_header); avio_wl64(pb, -1); /* header length, will be patched after */ avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */ avio_w8(pb, 1); /* ??? */ avio_w8(pb, 2); /* ??? */ /* file header */ header_offset = avio_tell(pb); hpos = put_header(pb, &ff_asf_file_header); put_guid(pb, &ff_asf_my_guid); avio_wl64(pb, file_size); file_time = 0; avio_wl64(pb, unix_to_file_time(file_time)); avio_wl64(pb, asf->nb_packets); /* number of packets */ avio_wl64(pb, duration); /* end time stamp (in 100ns units) */ avio_wl64(pb, asf->duration); /* duration (in 100ns units) */ avio_wl64(pb, PREROLL_TIME); /* start time stamp */ avio_wl32(pb, (asf->is_streamed || !pb->seekable ) ? 3 : 2); /* ??? */ avio_wl32(pb, s->packet_size); /* packet size */ avio_wl32(pb, s->packet_size); /* packet size */ avio_wl32(pb, bit_rate); /* Nominal data rate in bps */ end_header(pb, hpos); /* unknown headers */ hpos = put_header(pb, &ff_asf_head1_guid); put_guid(pb, &ff_asf_head2_guid); avio_wl32(pb, 6); avio_wl16(pb, 0); end_header(pb, hpos); /* title and other infos */ if (has_title) { int len; uint8_t *buf; AVIOContext *dyn_buf; if (avio_open_dyn_buf(&dyn_buf) < 0) return AVERROR(ENOMEM); hpos = put_header(pb, &ff_asf_comment_header); for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) { len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0; avio_wl16(pb, len); } len = avio_close_dyn_buf(dyn_buf, &buf); avio_write(pb, buf, len); av_freep(&buf); end_header(pb, hpos); } if (metadata_count) { AVMetadataTag *tag = NULL; hpos = put_header(pb, &ff_asf_extended_content_header); avio_wl16(pb, metadata_count); while ((tag = av_metadata_get(s->metadata, "", tag, AV_METADATA_IGNORE_SUFFIX))) { put_str16(pb, tag->key); avio_wl16(pb, 0); put_str16(pb, tag->value); } end_header(pb, hpos); } /* stream headers */ for(n=0;n<s->nb_streams;n++) { int64_t es_pos; // ASFStream *stream = &asf->streams[n]; enc = s->streams[n]->codec; asf->streams[n].num = n + 1; asf->streams[n].seq = 0; switch(enc->codec_type) { case AVMEDIA_TYPE_AUDIO: wav_extra_size = 0; extra_size = 18 + wav_extra_size; extra_size2 = 8; break; default: case AVMEDIA_TYPE_VIDEO: wav_extra_size = enc->extradata_size; extra_size = 0x33 + wav_extra_size; extra_size2 = 0; break; } hpos = put_header(pb, &ff_asf_stream_header); if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { put_guid(pb, &ff_asf_audio_stream); put_guid(pb, &ff_asf_audio_conceal_spread); } else { put_guid(pb, &ff_asf_video_stream); put_guid(pb, &ff_asf_video_conceal_none); } avio_wl64(pb, 0); /* ??? */ es_pos = avio_tell(pb); avio_wl32(pb, extra_size); /* wav header len */ avio_wl32(pb, extra_size2); /* additional data len */ avio_wl16(pb, n + 1); /* stream number */ avio_wl32(pb, 0); /* ??? */ if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { /* WAVEFORMATEX header */ int wavsize = ff_put_wav_header(pb, enc); if ((enc->codec_id != CODEC_ID_MP3) && (enc->codec_id != CODEC_ID_MP2) && (enc->codec_id != CODEC_ID_ADPCM_IMA_WAV) && (enc->extradata_size==0)) { wavsize += 2; avio_wl16(pb, 0); } if (wavsize < 0) return -1; if (wavsize != extra_size) { cur_pos = avio_tell(pb); avio_seek(pb, es_pos, SEEK_SET); avio_wl32(pb, wavsize); /* wav header len */ avio_seek(pb, cur_pos, SEEK_SET); } /* ERROR Correction */ avio_w8(pb, 0x01); if(enc->codec_id == CODEC_ID_ADPCM_G726 || !enc->block_align){ avio_wl16(pb, 0x0190); avio_wl16(pb, 0x0190); }else{ avio_wl16(pb, enc->block_align); avio_wl16(pb, enc->block_align); } avio_wl16(pb, 0x01); avio_w8(pb, 0x00); } else { avio_wl32(pb, enc->width); avio_wl32(pb, enc->height); avio_w8(pb, 2); /* ??? */ avio_wl16(pb, 40 + enc->extradata_size); /* size */ /* BITMAPINFOHEADER header */ ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 1); } end_header(pb, hpos); } /* media comments */ hpos = put_header(pb, &ff_asf_codec_comment_header); put_guid(pb, &ff_asf_codec_comment1_header); avio_wl32(pb, s->nb_streams); for(n=0;n<s->nb_streams;n++) { AVCodec *p; const char *desc; int len; uint8_t *buf; AVIOContext *dyn_buf; enc = s->streams[n]->codec; p = avcodec_find_encoder(enc->codec_id); if(enc->codec_type == AVMEDIA_TYPE_AUDIO) avio_wl16(pb, 2); else if(enc->codec_type == AVMEDIA_TYPE_VIDEO) avio_wl16(pb, 1); else avio_wl16(pb, -1); if(enc->codec_id == CODEC_ID_WMAV2) desc = "Windows Media Audio V8"; else desc = p ? p->name : enc->codec_name; if ( avio_open_dyn_buf(&dyn_buf) < 0) return AVERROR(ENOMEM); avio_put_str16le(dyn_buf, desc); len = avio_close_dyn_buf(dyn_buf, &buf); avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2 avio_write(pb, buf, len); av_freep(&buf); avio_wl16(pb, 0); /* no parameters */ /* id */ if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { avio_wl16(pb, 2); avio_wl16(pb, enc->codec_tag); } else { avio_wl16(pb, 4); avio_wl32(pb, enc->codec_tag); } if(!enc->codec_tag) return -1; } end_header(pb, hpos); /* patch the header size fields */ cur_pos = avio_tell(pb); header_size = cur_pos - header_offset; if (asf->is_streamed) { header_size += 8 + 30 + 50; avio_seek(pb, header_offset - 10 - 30, SEEK_SET); avio_wl16(pb, header_size); avio_seek(pb, header_offset - 2 - 30, SEEK_SET); avio_wl16(pb, header_size); header_size -= 8 + 30 + 50; } header_size += 24 + 6; avio_seek(pb, header_offset - 14, SEEK_SET); avio_wl64(pb, header_size); avio_seek(pb, cur_pos, SEEK_SET); /* movie chunk, followed by packets of packet_size */ asf->data_offset = cur_pos; put_guid(pb, &ff_asf_data_header); avio_wl64(pb, data_chunk_size); put_guid(pb, &ff_asf_my_guid); avio_wl64(pb, asf->nb_packets); /* nb packets */ avio_w8(pb, 1); /* ??? */ avio_w8(pb, 1); /* ??? */ return 0; }
static int flv_write_trailer(AVFormatContext *s) { int64_t file_size; AVIOContext *pb = s->pb; FLVContext *flv = s->priv_data; int build_keyframes_idx = flv->flags & FLV_ADD_KEYFRAME_INDEX; int i, res; int64_t cur_pos = avio_tell(s->pb); if (build_keyframes_idx) { FLVFileposition *newflv_posinfo, *p; avio_seek(pb, flv->videosize_offset, SEEK_SET); put_amf_double(pb, flv->videosize); avio_seek(pb, flv->audiosize_offset, SEEK_SET); put_amf_double(pb, flv->audiosize); avio_seek(pb, flv->lasttimestamp_offset, SEEK_SET); put_amf_double(pb, flv->lasttimestamp); avio_seek(pb, flv->lastkeyframetimestamp_offset, SEEK_SET); put_amf_double(pb, flv->lastkeyframetimestamp); avio_seek(pb, flv->lastkeyframelocation_offset, SEEK_SET); put_amf_double(pb, flv->lastkeyframelocation + flv->keyframe_index_size); avio_seek(pb, cur_pos, SEEK_SET); res = shift_data(s); if (res < 0) { goto end; } avio_seek(pb, flv->keyframes_info_offset, SEEK_SET); put_amf_string(pb, "filepositions"); put_amf_dword_array(pb, flv->filepositions_count); for (newflv_posinfo = flv->head_filepositions; newflv_posinfo; newflv_posinfo = newflv_posinfo->next) { put_amf_double(pb, newflv_posinfo->keyframe_position + flv->keyframe_index_size); } put_amf_string(pb, "times"); put_amf_dword_array(pb, flv->filepositions_count); for (newflv_posinfo = flv->head_filepositions; newflv_posinfo; newflv_posinfo = newflv_posinfo->next) { put_amf_double(pb, newflv_posinfo->keyframe_timestamp); } newflv_posinfo = flv->head_filepositions; while (newflv_posinfo) { p = newflv_posinfo->next; if (p) { newflv_posinfo->next = p->next; av_free(p); p = NULL; } else { av_free(newflv_posinfo); newflv_posinfo = NULL; } } put_amf_string(pb, ""); avio_w8(pb, AMF_END_OF_OBJECT); avio_seek(pb, cur_pos + flv->keyframe_index_size, SEEK_SET); } end: if (flv->flags & FLV_NO_SEQUENCE_END) { av_log(s, AV_LOG_DEBUG, "FLV no sequence end mode open\n"); } else { /* Add EOS tag */ for (i = 0; i < s->nb_streams; i++) { AVCodecParameters *par = s->streams[i]->codecpar; FLVStreamContext *sc = s->streams[i]->priv_data; if (par->codec_type == AVMEDIA_TYPE_VIDEO && (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4)) put_avc_eos_tag(pb, sc->last_ts); } } file_size = avio_tell(pb); if (build_keyframes_idx) { flv->datasize = file_size - flv->datastart_offset; avio_seek(pb, flv->datasize_offset, SEEK_SET); put_amf_double(pb, flv->datasize); } if (!(flv->flags & FLV_NO_METADATA)) { if (!(flv->flags & FLV_NO_DURATION_FILESIZE)) { /* update information */ if (avio_seek(pb, flv->duration_offset, SEEK_SET) < 0) { av_log(s, AV_LOG_WARNING, "Failed to update header with correct duration.\n"); } else { put_amf_double(pb, flv->duration / (double)1000); } if (avio_seek(pb, flv->filesize_offset, SEEK_SET) < 0) { av_log(s, AV_LOG_WARNING, "Failed to update header with correct filesize.\n"); } else { put_amf_double(pb, file_size); } } } return 0; }
static void put_amf_double(AVIOContext *pb, double d) { avio_w8(pb, AMF_DATA_TYPE_NUMBER); avio_wb64(pb, av_double2int(d)); }
static int flv_write_packet(AVFormatContext *s, AVPacket *pkt) { AVIOContext *pb = s->pb; AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar; FLVContext *flv = s->priv_data; FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data; unsigned ts; int size = pkt->size; uint8_t *data = NULL; int flags = -1, flags_size, ret; int64_t cur_offset = avio_tell(pb); if (par->codec_type == AVMEDIA_TYPE_AUDIO && !pkt->size) { av_log(s, AV_LOG_WARNING, "Empty audio Packet\n"); return AVERROR(EINVAL); } if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A || par->codec_id == AV_CODEC_ID_VP6 || par->codec_id == AV_CODEC_ID_AAC) flags_size = 2; else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) flags_size = 5; else flags_size = 1; if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) { int side_size = 0; uint8_t *side = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size); if (side && side_size > 0 && (side_size != par->extradata_size || memcmp(side, par->extradata, side_size))) { av_free(par->extradata); par->extradata = av_mallocz(side_size + AV_INPUT_BUFFER_PADDING_SIZE); if (!par->extradata) { par->extradata_size = 0; return AVERROR(ENOMEM); } memcpy(par->extradata, side, side_size); par->extradata_size = side_size; flv_write_codec_header(s, par); } } if (flv->delay == AV_NOPTS_VALUE) flv->delay = -pkt->dts; if (pkt->dts < -flv->delay) { av_log(s, AV_LOG_WARNING, "Packets are not in the proper order with respect to DTS\n"); return AVERROR(EINVAL); } ts = pkt->dts; if (s->event_flags & AVSTREAM_EVENT_FLAG_METADATA_UPDATED) { write_metadata(s, ts); s->event_flags &= ~AVSTREAM_EVENT_FLAG_METADATA_UPDATED; } avio_write_marker(pb, av_rescale(ts, AV_TIME_BASE, 1000), pkt->flags & AV_PKT_FLAG_KEY && (flv->video_par ? par->codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT); switch (par->codec_type) { case AVMEDIA_TYPE_VIDEO: avio_w8(pb, FLV_TAG_TYPE_VIDEO); flags = ff_codec_get_tag(flv_video_codec_ids, par->codec_id); flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER; break; case AVMEDIA_TYPE_AUDIO: flags = get_audio_flags(s, par); av_assert0(size); avio_w8(pb, FLV_TAG_TYPE_AUDIO); break; case AVMEDIA_TYPE_SUBTITLE: case AVMEDIA_TYPE_DATA: avio_w8(pb, FLV_TAG_TYPE_META); break; default: return AVERROR(EINVAL); } if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) { /* check if extradata looks like mp4 formatted */ if (par->extradata_size > 0 && *(uint8_t*)par->extradata != 1) if ((ret = ff_avc_parse_nal_units_buf(pkt->data, &data, &size)) < 0) return ret; } else if (par->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) { if (!s->streams[pkt->stream_index]->nb_frames) { av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: " "use the audio bitstream filter 'aac_adtstoasc' to fix it " "('-bsf:a aac_adtstoasc' option with ffmpeg)\n"); return AVERROR_INVALIDDATA; } av_log(s, AV_LOG_WARNING, "aac bitstream error\n"); } /* check Speex packet duration */ if (par->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160) av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than " "8 frames per packet. Adobe Flash " "Player cannot handle this!\n"); if (sc->last_ts < ts) sc->last_ts = ts; if (size + flags_size >= 1<<24) { av_log(s, AV_LOG_ERROR, "Too large packet with size %u >= %u\n", size + flags_size, 1<<24); return AVERROR(EINVAL); } avio_wb24(pb, size + flags_size); avio_wb24(pb, ts & 0xFFFFFF); avio_w8(pb, (ts >> 24) & 0x7F); // timestamps are 32 bits _signed_ avio_wb24(pb, flv->reserved); if (par->codec_type == AVMEDIA_TYPE_DATA || par->codec_type == AVMEDIA_TYPE_SUBTITLE ) { int data_size; int64_t metadata_size_pos = avio_tell(pb); if (par->codec_id == AV_CODEC_ID_TEXT) { // legacy FFmpeg magic? avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, "onTextData"); avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY); avio_wb32(pb, 2); put_amf_string(pb, "type"); avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, "Text"); put_amf_string(pb, "text"); avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, pkt->data); put_amf_string(pb, ""); avio_w8(pb, AMF_END_OF_OBJECT); } else { // just pass the metadata through avio_write(pb, data ? data : pkt->data, size); } /* write total size of tag */ data_size = avio_tell(pb) - metadata_size_pos; avio_seek(pb, metadata_size_pos - 10, SEEK_SET); avio_wb24(pb, data_size); avio_seek(pb, data_size + 10 - 3, SEEK_CUR); avio_wb32(pb, data_size + 11); } else { av_assert1(flags>=0); avio_w8(pb,flags); if (par->codec_id == AV_CODEC_ID_VP6) avio_w8(pb,0); if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A) { if (par->extradata_size) avio_w8(pb, par->extradata[0]); else avio_w8(pb, ((FFALIGN(par->width, 16) - par->width) << 4) | (FFALIGN(par->height, 16) - par->height)); } else if (par->codec_id == AV_CODEC_ID_AAC) avio_w8(pb, 1); // AAC raw else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) { avio_w8(pb, 1); // AVC NALU avio_wb24(pb, pkt->pts - pkt->dts); } avio_write(pb, data ? data : pkt->data, size); avio_wb32(pb, size + flags_size + 11); // previous tag size flv->duration = FFMAX(flv->duration, pkt->pts + flv->delay + pkt->duration); } if (flv->flags & FLV_ADD_KEYFRAME_INDEX) { switch (par->codec_type) { case AVMEDIA_TYPE_VIDEO: flv->videosize += (avio_tell(pb) - cur_offset); flv->lasttimestamp = flv->acurframeindex / flv->framerate; if (pkt->flags & AV_PKT_FLAG_KEY) { double ts = flv->acurframeindex / flv->framerate; int64_t pos = cur_offset; flv->lastkeyframetimestamp = flv->acurframeindex / flv->framerate; flv->lastkeyframelocation = pos; flv_append_keyframe_info(s, flv, ts, pos); } flv->acurframeindex++; break; case AVMEDIA_TYPE_AUDIO: flv->audiosize += (avio_tell(pb) - cur_offset); break; default: av_log(s, AV_LOG_WARNING, "par->codec_type is type = [%d]\n", par->codec_type); break; } } av_free(data); return pb->error; }
static int flv_write_header(AVFormatContext *s) { AVIOContext *pb = s->pb; FLVContext *flv = s->priv_data; AVCodecContext *audio_enc = NULL, *video_enc = NULL, *data_enc = NULL; int i, metadata_count = 0; double framerate = 0.0; int64_t metadata_size_pos, data_size, metadata_count_pos; AVDictionaryEntry *tag = NULL; for (i = 0; i < s->nb_streams; i++) { AVCodecContext *enc = s->streams[i]->codec; FLVStreamContext *sc; switch (enc->codec_type) { case AVMEDIA_TYPE_VIDEO: if (s->streams[i]->r_frame_rate.den && s->streams[i]->r_frame_rate.num) { framerate = av_q2d(s->streams[i]->r_frame_rate); } else { framerate = 1 / av_q2d(s->streams[i]->codec->time_base); } video_enc = enc; if (enc->codec_tag == 0) { av_log(s, AV_LOG_ERROR, "video codec not compatible with flv\n"); return -1; } break; case AVMEDIA_TYPE_AUDIO: audio_enc = enc; if (get_audio_flags(s, enc) < 0) return AVERROR_INVALIDDATA; break; case AVMEDIA_TYPE_DATA: if (enc->codec_id != CODEC_ID_TEXT) { av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n"); return AVERROR_INVALIDDATA; } data_enc = enc; break; default: av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n"); return -1; } avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */ sc = av_mallocz(sizeof(FLVStreamContext)); if (!sc) return AVERROR(ENOMEM); s->streams[i]->priv_data = sc; sc->last_ts = -1; } flv->delay = AV_NOPTS_VALUE; avio_write(pb, "FLV", 3); avio_w8(pb, 1); avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!audio_enc + FLV_HEADER_FLAG_HASVIDEO * !!video_enc); avio_wb32(pb, 9); avio_wb32(pb, 0); for (i = 0; i < s->nb_streams; i++) if (s->streams[i]->codec->codec_tag == 5) { avio_w8(pb, 8); // message type avio_wb24(pb, 0); // include flags avio_wb24(pb, 0); // time stamp avio_wb32(pb, 0); // reserved avio_wb32(pb, 11); // size flv->reserved = 5; } /* write meta_tag */ avio_w8(pb, 18); // tag type META metadata_size_pos = avio_tell(pb); avio_wb24(pb, 0); // size of data part (sum of all parts below) avio_wb24(pb, 0); // timestamp avio_wb32(pb, 0); // reserved /* now data of data_size size */ /* first event name as a string */ avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, "onMetaData"); // 12 bytes /* mixed array (hash) with size and string/type/data tuples */ avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY); metadata_count_pos = avio_tell(pb); metadata_count = 5 * !!video_enc + 5 * !!audio_enc + 1 * !!data_enc + 2; // +2 for duration and file size avio_wb32(pb, metadata_count); put_amf_string(pb, "duration"); flv->duration_offset= avio_tell(pb); // fill in the guessed duration, it'll be corrected later if incorrect put_amf_double(pb, s->duration / AV_TIME_BASE); if (video_enc) { put_amf_string(pb, "width"); put_amf_double(pb, video_enc->width); put_amf_string(pb, "height"); put_amf_double(pb, video_enc->height); put_amf_string(pb, "videodatarate"); put_amf_double(pb, video_enc->bit_rate / 1024.0); put_amf_string(pb, "framerate"); put_amf_double(pb, framerate); put_amf_string(pb, "videocodecid"); put_amf_double(pb, video_enc->codec_tag); } if (audio_enc) { put_amf_string(pb, "audiodatarate"); put_amf_double(pb, audio_enc->bit_rate / 1024.0); put_amf_string(pb, "audiosamplerate"); put_amf_double(pb, audio_enc->sample_rate); put_amf_string(pb, "audiosamplesize"); put_amf_double(pb, audio_enc->codec_id == CODEC_ID_PCM_U8 ? 8 : 16); put_amf_string(pb, "stereo"); put_amf_bool(pb, audio_enc->channels == 2); put_amf_string(pb, "audiocodecid"); put_amf_double(pb, audio_enc->codec_tag); } if (data_enc) { put_amf_string(pb, "datastream"); put_amf_double(pb, 0.0); } while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) { if( !strcmp(tag->key, "width") ||!strcmp(tag->key, "height") ||!strcmp(tag->key, "videodatarate") ||!strcmp(tag->key, "framerate") ||!strcmp(tag->key, "videocodecid") ||!strcmp(tag->key, "audiodatarate") ||!strcmp(tag->key, "audiosamplerate") ||!strcmp(tag->key, "audiosamplesize") ||!strcmp(tag->key, "stereo") ||!strcmp(tag->key, "audiocodecid") ||!strcmp(tag->key, "duration") ||!strcmp(tag->key, "onMetaData") ){ av_log(s, AV_LOG_DEBUG, "ignoring metadata for %s\n", tag->key); continue; } put_amf_string(pb, tag->key); avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, tag->value); metadata_count++; } put_amf_string(pb, "filesize"); flv->filesize_offset = avio_tell(pb); put_amf_double(pb, 0); // delayed write put_amf_string(pb, ""); avio_w8(pb, AMF_END_OF_OBJECT); /* write total size of tag */ data_size = avio_tell(pb) - metadata_size_pos - 10; avio_seek(pb, metadata_count_pos, SEEK_SET); avio_wb32(pb, metadata_count); avio_seek(pb, metadata_size_pos, SEEK_SET); avio_wb24(pb, data_size); avio_skip(pb, data_size + 10 - 3); avio_wb32(pb, data_size + 11); for (i = 0; i < s->nb_streams; i++) { AVCodecContext *enc = s->streams[i]->codec; if (enc->codec_id == CODEC_ID_AAC || enc->codec_id == CODEC_ID_H264 || enc->codec_id == CODEC_ID_MPEG4) { int64_t pos; avio_w8(pb, enc->codec_type == AVMEDIA_TYPE_VIDEO ? FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO); avio_wb24(pb, 0); // size patched later avio_wb24(pb, 0); // ts avio_w8(pb, 0); // ts ext avio_wb24(pb, 0); // streamid pos = avio_tell(pb); if (enc->codec_id == CODEC_ID_AAC) { avio_w8(pb, get_audio_flags(s, enc)); avio_w8(pb, 0); // AAC sequence header avio_write(pb, enc->extradata, enc->extradata_size); } else { avio_w8(pb, enc->codec_tag | FLV_FRAME_KEY); // flags avio_w8(pb, 0); // AVC sequence header avio_wb24(pb, 0); // composition time ff_isom_write_avcc(pb, enc->extradata, enc->extradata_size); } data_size = avio_tell(pb) - pos; avio_seek(pb, -data_size - 10, SEEK_CUR); avio_wb24(pb, data_size); avio_skip(pb, data_size + 10 - 3); avio_wb32(pb, data_size + 11); // previous tag size } } return 0; }
static int avi_write_packet(AVFormatContext *s, AVPacket *pkt) { unsigned char tag[5]; unsigned int flags = 0; const int stream_index = pkt->stream_index; int size = pkt->size; AVIContext *avi = s->priv_data; AVIOContext *pb = s->pb; AVIStream *avist = s->streams[stream_index]->priv_data; AVCodecContext *enc = s->streams[stream_index]->codec; int ret; if (enc->codec_id == AV_CODEC_ID_H264 && enc->codec_tag == MKTAG('H','2','6','4') && pkt->size) { ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt); if (ret < 0) return ret; } if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0) return ret; if (pkt->dts != AV_NOPTS_VALUE) avist->last_dts = pkt->dts + pkt->duration; 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) { idx->ents_allocated = 0; idx->entry = 0; return AVERROR(ENOMEM); } idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry)); if (!idx->cluster[cl]) return AVERROR(ENOMEM); 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; avist->max_size = FFMAX(avist->max_size, 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); return 0; }
static int rv10_write_header(AVFormatContext *ctx, int data_size, int index_pos) { RMMuxContext *rm = ctx->priv_data; AVIOContext *s = ctx->pb; StreamInfo *stream; unsigned char *data_offset_ptr, *start_ptr; const char *desc, *mimetype; int nb_packets, packet_total_size, packet_max_size, size, packet_avg_size, i; int bit_rate, v, duration, flags, data_pos; AVDictionaryEntry *tag; start_ptr = s->buf_ptr; ffio_wfourcc(s, ".RMF"); avio_wb32(s,18); /* header size */ avio_wb16(s,0); avio_wb32(s,0); avio_wb32(s,4 + ctx->nb_streams); /* num headers */ ffio_wfourcc(s,"PROP"); avio_wb32(s, 50); avio_wb16(s, 0); packet_max_size = 0; packet_total_size = 0; nb_packets = 0; bit_rate = 0; duration = 0; for(i=0;i<ctx->nb_streams;i++) { StreamInfo *stream = &rm->streams[i]; bit_rate += stream->bit_rate; if (stream->packet_max_size > packet_max_size) packet_max_size = stream->packet_max_size; nb_packets += stream->nb_packets; packet_total_size += stream->packet_total_size; /* select maximum duration */ v = (int) (1000.0 * (float)stream->total_frames / stream->frame_rate); if (v > duration) duration = v; } avio_wb32(s, bit_rate); /* max bit rate */ avio_wb32(s, bit_rate); /* avg bit rate */ avio_wb32(s, packet_max_size); /* max packet size */ if (nb_packets > 0) packet_avg_size = packet_total_size / nb_packets; else packet_avg_size = 0; avio_wb32(s, packet_avg_size); /* avg packet size */ avio_wb32(s, nb_packets); /* num packets */ avio_wb32(s, duration); /* duration */ avio_wb32(s, BUFFER_DURATION); /* preroll */ avio_wb32(s, index_pos); /* index offset */ /* computation of data the data offset */ data_offset_ptr = s->buf_ptr; avio_wb32(s, 0); /* data offset : will be patched after */ avio_wb16(s, ctx->nb_streams); /* num streams */ flags = 1 | 2; /* save allowed & perfect play */ if (!s->seekable) flags |= 4; /* live broadcast */ avio_wb16(s, flags); /* comments */ ffio_wfourcc(s,"CONT"); size = 4 * 2 + 10; for(i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) { tag = av_dict_get(ctx->metadata, ff_rm_metadata[i], NULL, 0); if(tag) size += strlen(tag->value); } avio_wb32(s,size); avio_wb16(s,0); for(i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) { tag = av_dict_get(ctx->metadata, ff_rm_metadata[i], NULL, 0); put_str(s, tag ? tag->value : ""); } for(i=0;i<ctx->nb_streams;i++) { int codec_data_size; stream = &rm->streams[i]; if (stream->enc->codec_type == AVMEDIA_TYPE_AUDIO) { desc = "The Audio Stream"; mimetype = "audio/x-pn-realaudio"; codec_data_size = 73; } else { desc = "The Video Stream"; mimetype = "video/x-pn-realvideo"; codec_data_size = 34; } ffio_wfourcc(s,"MDPR"); size = 10 + 9 * 4 + strlen(desc) + strlen(mimetype) + codec_data_size; avio_wb32(s, size); avio_wb16(s, 0); avio_wb16(s, i); /* stream number */ avio_wb32(s, stream->bit_rate); /* max bit rate */ avio_wb32(s, stream->bit_rate); /* avg bit rate */ avio_wb32(s, stream->packet_max_size); /* max packet size */ if (stream->nb_packets > 0) packet_avg_size = stream->packet_total_size / stream->nb_packets; else packet_avg_size = 0; avio_wb32(s, packet_avg_size); /* avg packet size */ avio_wb32(s, 0); /* start time */ avio_wb32(s, BUFFER_DURATION); /* preroll */ /* duration */ if (!s->seekable || !stream->total_frames) avio_wb32(s, (int)(3600 * 1000)); else avio_wb32(s, (int)(stream->total_frames * 1000 / stream->frame_rate)); put_str8(s, desc); put_str8(s, mimetype); avio_wb32(s, codec_data_size); if (stream->enc->codec_type == AVMEDIA_TYPE_AUDIO) { int coded_frame_size, fscode, sample_rate; sample_rate = stream->enc->sample_rate; coded_frame_size = (stream->enc->bit_rate * stream->enc->frame_size) / (8 * sample_rate); /* audio codec info */ avio_write(s, ".ra", 3); avio_w8(s, 0xfd); avio_wb32(s, 0x00040000); /* version */ ffio_wfourcc(s, ".ra4"); avio_wb32(s, 0x01b53530); /* stream length */ avio_wb16(s, 4); /* unknown */ avio_wb32(s, 0x39); /* header size */ switch(sample_rate) { case 48000: case 24000: case 12000: fscode = 1; break; default: case 44100: case 22050: case 11025: fscode = 2; break; case 32000: case 16000: case 8000: fscode = 3; } avio_wb16(s, fscode); /* codec additional info, for AC-3, seems to be a frequency code */ /* special hack to compensate rounding errors... */ if (coded_frame_size == 557) coded_frame_size--; avio_wb32(s, coded_frame_size); /* frame length */ avio_wb32(s, 0x51540); /* unknown */ avio_wb32(s, 0x249f0); /* unknown */ avio_wb32(s, 0x249f0); /* unknown */ avio_wb16(s, 0x01); /* frame length : seems to be very important */ avio_wb16(s, coded_frame_size); avio_wb32(s, 0); /* unknown */ avio_wb16(s, stream->enc->sample_rate); /* sample rate */ avio_wb32(s, 0x10); /* unknown */ avio_wb16(s, stream->enc->channels); put_str8(s, "Int0"); /* codec name */ if (stream->enc->codec_tag) { avio_w8(s, 4); /* tag length */ avio_wl32(s, stream->enc->codec_tag); } else { av_log(ctx, AV_LOG_ERROR, "Invalid codec tag\n"); return -1; } avio_wb16(s, 0); /* title length */ avio_wb16(s, 0); /* author length */ avio_wb16(s, 0); /* copyright length */ avio_w8(s, 0); /* end of header */ } else { /* video codec info */ avio_wb32(s,34); /* size */ ffio_wfourcc(s, "VIDO"); if(stream->enc->codec_id == CODEC_ID_RV10) ffio_wfourcc(s,"RV10"); else ffio_wfourcc(s,"RV20"); avio_wb16(s, stream->enc->width); avio_wb16(s, stream->enc->height); avio_wb16(s, (int) stream->frame_rate); /* frames per seconds ? */ avio_wb32(s,0); /* unknown meaning */ avio_wb16(s, (int) stream->frame_rate); /* unknown meaning */ avio_wb32(s,0); /* unknown meaning */ avio_wb16(s, 8); /* unknown meaning */ /* Seems to be the codec version: only use basic H263. The next versions seems to add a diffential DC coding as in MPEG... nothing new under the sun */ if(stream->enc->codec_id == CODEC_ID_RV10) avio_wb32(s,0x10000000); else avio_wb32(s,0x20103001); //avio_wb32(s,0x10003000); } } /* patch data offset field */ data_pos = s->buf_ptr - start_ptr; rm->data_pos = data_pos; data_offset_ptr[0] = data_pos >> 24; data_offset_ptr[1] = data_pos >> 16; data_offset_ptr[2] = data_pos >> 8; data_offset_ptr[3] = data_pos; /* data stream */ ffio_wfourcc(s, "DATA"); avio_wb32(s,data_size + 10 + 8); avio_wb16(s,0); avio_wb32(s, nb_packets); /* number of packets */ avio_wb32(s,0); /* next data header */ 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, avi->packet_count[stream_index], 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, avi->packet_count[stream_index]); } 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(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 = 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; }