static int latm_decode_extradata(LATMContext *ctx, uint8_t *buf, int size) { MPEG4AudioConfig m4ac; if (size > MAX_EXTRADATA_SIZE) { av_log(ctx, AV_LOG_ERROR, "Extradata is larger than currently supported.\n"); return AVERROR_INVALIDDATA; } ctx->off = avpriv_mpeg4audio_get_config(&m4ac, buf, size * 8, 1); if (ctx->off < 0) return ctx->off; if (ctx->object_type == AOT_ALS && (ctx->off & 7)) { // as long as avpriv_mpeg4audio_get_config works correctly this is impossible av_log(ctx, AV_LOG_ERROR, "BUG: ALS offset is not byte-aligned\n"); return AVERROR_INVALIDDATA; } /* FIXME: are any formats not allowed in LATM? */ if (m4ac.object_type > AOT_SBR && m4ac.object_type != AOT_ALS) { av_log(ctx, AV_LOG_ERROR, "Muxing MPEG-4 AOT %d in LATM is not supported\n", m4ac.object_type); return AVERROR_INVALIDDATA; } ctx->channel_conf = m4ac.chan_config; ctx->object_type = m4ac.object_type; return 0; }
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb) { enum AVCodecID codec_id; unsigned v; int len, tag; int ret; int object_type_id = avio_r8(pb); avio_r8(pb); /* stream type */ avio_rb24(pb); /* buffer size db */ v = avio_rb32(pb); // TODO: fix this with codecpar #if FF_API_LAVF_AVCTX FF_DISABLE_DEPRECATION_WARNINGS if (v < INT32_MAX) st->codec->rc_max_rate = v; FF_ENABLE_DEPRECATION_WARNINGS #endif st->codecpar->bit_rate = avio_rb32(pb); /* avg bitrate */ codec_id= ff_codec_get_id(ff_mp4_obj_type, object_type_id); if (codec_id) st->codecpar->codec_id = codec_id; av_log(fc, AV_LOG_TRACE, "esds object type id 0x%02x\n", object_type_id); len = ff_mp4_read_descr(fc, pb, &tag); if (tag == MP4DecSpecificDescrTag) { av_log(fc, AV_LOG_TRACE, "Specific MPEG-4 header len=%d\n", len); if (!len || (uint64_t)len > (1<<30)) return -1; av_free(st->codecpar->extradata); if ((ret = ff_get_extradata(fc, st->codecpar, pb, len)) < 0) return ret; if (st->codecpar->codec_id == AV_CODEC_ID_AAC) { MPEG4AudioConfig cfg = {0}; avpriv_mpeg4audio_get_config(&cfg, st->codecpar->extradata, st->codecpar->extradata_size * 8, 1); st->codecpar->channels = cfg.channels; if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4 st->codecpar->sample_rate = avpriv_mpa_freq_tab[cfg.sampling_index]; else if (cfg.ext_sample_rate) st->codecpar->sample_rate = cfg.ext_sample_rate; else st->codecpar->sample_rate = cfg.sample_rate; av_log(fc, AV_LOG_TRACE, "mp4a config channels %d obj %d ext obj %d " "sample rate %d ext sample rate %d\n", st->codecpar->channels, cfg.object_type, cfg.ext_object_type, cfg.sample_rate, cfg.ext_sample_rate); if (!(st->codecpar->codec_id = ff_codec_get_id(mp4_audio_types, cfg.object_type))) st->codecpar->codec_id = AV_CODEC_ID_AAC; } } return 0; }
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb) { enum AVCodecID codec_id; int len, tag; int ret; int object_type_id = avio_r8(pb); avio_r8(pb); /* stream type */ avio_rb24(pb); /* buffer size db */ avio_rb32(pb); /* max bitrate */ avio_rb32(pb); /* avg bitrate */ if(avcodec_is_open(st->codec)) { av_log(fc, AV_LOG_DEBUG, "codec open in read_dec_config_descr\n"); return -1; } codec_id= ff_codec_get_id(ff_mp4_obj_type, object_type_id); if (codec_id) st->codec->codec_id= codec_id; av_log(fc, AV_LOG_TRACE, "esds object type id 0x%02x\n", object_type_id); len = ff_mp4_read_descr(fc, pb, &tag); if (tag == MP4DecSpecificDescrTag) { av_log(fc, AV_LOG_TRACE, "Specific MPEG4 header len=%d\n", len); if (!len || (uint64_t)len > (1<<30)) return -1; av_free(st->codec->extradata); if ((ret = ff_get_extradata(st->codec, pb, len)) < 0) return ret; if (st->codec->codec_id == AV_CODEC_ID_AAC) { MPEG4AudioConfig cfg = {0}; avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata, st->codec->extradata_size * 8, 1); st->codec->channels = cfg.channels; if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4 st->codec->sample_rate = avpriv_mpa_freq_tab[cfg.sampling_index]; else if (cfg.ext_sample_rate) st->codec->sample_rate = cfg.ext_sample_rate; else st->codec->sample_rate = cfg.sample_rate; av_log(fc, AV_LOG_TRACE, "mp4a config channels %d obj %d ext obj %d " "sample rate %d ext sample rate %d\n", st->codec->channels, cfg.object_type, cfg.ext_object_type, cfg.sample_rate, cfg.ext_sample_rate); if (!(st->codec->codec_id = ff_codec_get_id(mp4_audio_types, cfg.object_type))) st->codec->codec_id = AV_CODEC_ID_AAC; } } return 0; }
static int adts_decode_extradata(AVFormatContext *s, ADTSContext *adts, uint8_t *buf, int size) { GetBitContext gb; PutBitContext pb; MPEG4AudioConfig m4ac; int off; init_get_bits(&gb, buf, size * 8); off = avpriv_mpeg4audio_get_config(&m4ac, buf, size * 8, 1); if (off < 0) return off; skip_bits_long(&gb, off); adts->objecttype = m4ac.object_type - 1; adts->sample_rate_index = m4ac.sampling_index; adts->channel_conf = m4ac.chan_config; if (adts->objecttype > 3U) { av_log(s, AV_LOG_ERROR, "MPEG-4 AOT %d is not allowed in ADTS\n", adts->objecttype+1); return AVERROR_INVALIDDATA; } if (adts->sample_rate_index == 15) { av_log(s, AV_LOG_ERROR, "Escape sample rate index illegal in ADTS\n"); return AVERROR_INVALIDDATA; } if (get_bits(&gb, 1)) { av_log(s, AV_LOG_ERROR, "960/120 MDCT window is not allowed in ADTS\n"); return AVERROR_INVALIDDATA; } if (get_bits(&gb, 1)) { av_log(s, AV_LOG_ERROR, "Scalable configurations are not allowed in ADTS\n"); return AVERROR_INVALIDDATA; } if (get_bits(&gb, 1)) { av_log(s, AV_LOG_ERROR, "Extension flag is not allowed in ADTS\n"); return AVERROR_INVALIDDATA; } if (!adts->channel_conf) { init_put_bits(&pb, adts->pce_data, MAX_PCE_SIZE); put_bits(&pb, 3, 5); //ID_PCE adts->pce_size = (avpriv_copy_pce_data(&pb, &gb) + 3) / 8; flush_put_bits(&pb); } adts->write_adts = 1; return 0; }
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb) { int len, tag; int object_type_id = avio_r8(pb); avio_r8(pb); /* stream type */ avio_rb24(pb); /* buffer size db */ avio_rb32(pb); /* max bitrate */ avio_rb32(pb); /* avg bitrate */ st->codec->codec_id= ff_codec_get_id(ff_mp4_obj_type, object_type_id); av_dlog(fc, "esds object type id 0x%02x\n", object_type_id); len = ff_mp4_read_descr(fc, pb, &tag); if (tag == MP4DecSpecificDescrTag) { av_dlog(fc, "Specific MPEG4 header len=%d\n", len); if (!len || (uint64_t)len > (1<<30)) return -1; av_free(st->codec->extradata); st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE); if (!st->codec->extradata) return AVERROR(ENOMEM); avio_read(pb, st->codec->extradata, len); st->codec->extradata_size = len; if (st->codec->codec_id == CODEC_ID_AAC) { MPEG4AudioConfig cfg; avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata, st->codec->extradata_size * 8, 1); st->codec->channels = cfg.channels; if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4 st->codec->sample_rate = avpriv_mpa_freq_tab[cfg.sampling_index]; else if (cfg.ext_sample_rate) st->codec->sample_rate = cfg.ext_sample_rate; else st->codec->sample_rate = cfg.sample_rate; av_dlog(fc, "mp4a config channels %d obj %d ext obj %d " "sample rate %d ext sample rate %d\n", st->codec->channels, cfg.object_type, cfg.ext_object_type, cfg.sample_rate, cfg.ext_sample_rate); if (!(st->codec->codec_id = ff_codec_get_id(mp4_audio_types, cfg.object_type))) st->codec->codec_id = CODEC_ID_AAC; } } return 0; }
static int latm_decode_extradata(LATMContext *ctx, uint8_t *buf, int size) { GetBitContext gb; MPEG4AudioConfig m4ac; init_get_bits(&gb, buf, size * 8); ctx->off = avpriv_mpeg4audio_get_config(&m4ac, buf, size); if (ctx->off < 0) return ctx->off; skip_bits_long(&gb, ctx->off); /* FIXME: are any formats not allowed in LATM? */ if (m4ac.object_type > AOT_SBR && m4ac.object_type != AOT_ALS) { av_log(ctx, AV_LOG_ERROR, "Muxing MPEG-4 AOT %d in LATM is not supported\n", m4ac.object_type); return AVERROR_INVALIDDATA; } ctx->channel_conf = m4ac.chan_config; ctx->object_type = m4ac.object_type; return 0; }