static int get_aiff_header(AVFormatContext *s, int size, unsigned version) { AVIOContext *pb = s->pb; AVCodecParameters *par = s->streams[0]->codecpar; AIFFInputContext *aiff = s->priv_data; int exp; uint64_t val; int sample_rate; unsigned int num_frames; if (size & 1) size++; par->codec_type = AVMEDIA_TYPE_AUDIO; par->channels = avio_rb16(pb); num_frames = avio_rb32(pb); par->bits_per_coded_sample = avio_rb16(pb); exp = avio_rb16(pb) - 16383 - 63; val = avio_rb64(pb); if (exp <-63 || exp >63) { av_log(s, AV_LOG_ERROR, "exp %d is out of range\n", exp); return AVERROR_INVALIDDATA; } if (exp >= 0) sample_rate = val << exp; else sample_rate = (val + (1ULL<<(-exp-1))) >> -exp; par->sample_rate = sample_rate; size -= 18; /* get codec id for AIFF-C */ if (size < 4) { version = AIFF; } else if (version == AIFF_C_VERSION1) { par->codec_tag = avio_rl32(pb); par->codec_id = ff_codec_get_id(ff_codec_aiff_tags, par->codec_tag); if (par->codec_id == AV_CODEC_ID_NONE) { char tag[32]; av_get_codec_tag_string(tag, sizeof(tag), par->codec_tag); avpriv_request_sample(s, "unknown or unsupported codec tag: %s", tag); } size -= 4; } if (version != AIFF_C_VERSION1 || par->codec_id == AV_CODEC_ID_PCM_S16BE) { par->codec_id = aiff_codec_get_id(par->bits_per_coded_sample); par->bits_per_coded_sample = av_get_bits_per_sample(par->codec_id); aiff->block_duration = 1; } else { switch (par->codec_id) { case AV_CODEC_ID_PCM_F32BE: case AV_CODEC_ID_PCM_F64BE: case AV_CODEC_ID_PCM_S16LE: case AV_CODEC_ID_PCM_ALAW: case AV_CODEC_ID_PCM_MULAW: aiff->block_duration = 1; break; case AV_CODEC_ID_ADPCM_IMA_QT: par->block_align = 34 * par->channels; break; case AV_CODEC_ID_MACE3: par->block_align = 2 * par->channels; break; case AV_CODEC_ID_ADPCM_G726LE: par->bits_per_coded_sample = 5; case AV_CODEC_ID_ADPCM_IMA_WS: case AV_CODEC_ID_ADPCM_G722: case AV_CODEC_ID_MACE6: case AV_CODEC_ID_SDX2_DPCM: par->block_align = 1 * par->channels; break; case AV_CODEC_ID_GSM: par->block_align = 33; break; default: aiff->block_duration = 1; break; } if (par->block_align > 0) aiff->block_duration = av_get_audio_frame_duration2(par, par->block_align); } /* Block align needs to be computed in all cases, as the definition * is specific to applications -> here we use the WAVE format definition */ if (!par->block_align) par->block_align = (av_get_bits_per_sample(par->codec_id) * par->channels) >> 3; if (aiff->block_duration) { par->bit_rate = par->sample_rate * (par->block_align << 3) / aiff->block_duration; } /* Chunk is over */ if (size) avio_skip(pb, size); return num_frames; }
static int get_aiff_header(AVFormatContext *s, int size, unsigned version) { AVIOContext *pb = s->pb; AVCodecParameters *par = s->streams[0]->codecpar; AIFFInputContext *aiff = s->priv_data; int exp; uint64_t val; int sample_rate; unsigned int num_frames; if (size & 1) size++; par->codec_type = AVMEDIA_TYPE_AUDIO; par->channels = avio_rb16(pb); num_frames = avio_rb32(pb); par->bits_per_coded_sample = avio_rb16(pb); exp = avio_rb16(pb) - 16383 - 63; val = avio_rb64(pb); if (exp <-63 || exp >63) { av_log(s, AV_LOG_ERROR, "exp %d is out of range\n", exp); return AVERROR_INVALIDDATA; } if (exp >= 0) sample_rate = val << exp; else sample_rate = (val + (1ULL<<(-exp-1))) >> -exp; par->sample_rate = sample_rate; size -= 18;   if (size < 4) { version = AIFF; } else if (version == AIFF_C_VERSION1) { par->codec_tag = avio_rl32(pb); par->codec_id = ff_codec_get_id(ff_codec_aiff_tags, par->codec_tag); if (par->codec_id == AV_CODEC_ID_NONE) { char tag[32]; av_get_codec_tag_string(tag, sizeof(tag), par->codec_tag); avpriv_request_sample(s, "unknown or unsupported codec tag: %s", tag); } size -= 4; } if (version != AIFF_C_VERSION1 || par->codec_id == AV_CODEC_ID_PCM_S16BE) { par->codec_id = aiff_codec_get_id(par->bits_per_coded_sample); par->bits_per_coded_sample = av_get_bits_per_sample(par->codec_id); aiff->block_duration = 1; } else { switch (par->codec_id) { case AV_CODEC_ID_PCM_F32BE: case AV_CODEC_ID_PCM_F64BE: case AV_CODEC_ID_PCM_S16LE: case AV_CODEC_ID_PCM_ALAW: case AV_CODEC_ID_PCM_MULAW: aiff->block_duration = 1; break; case AV_CODEC_ID_ADPCM_IMA_QT: par->block_align = 34 * par->channels; break; case AV_CODEC_ID_MACE3: par->block_align = 2 * par->channels; break; case AV_CODEC_ID_ADPCM_G726LE: par->bits_per_coded_sample = 5; case AV_CODEC_ID_ADPCM_IMA_WS: case AV_CODEC_ID_ADPCM_G722: case AV_CODEC_ID_MACE6: case AV_CODEC_ID_SDX2_DPCM: par->block_align = 1 * par->channels; break; case AV_CODEC_ID_GSM: par->block_align = 33; break; default: aiff->block_duration = 1; break; } if (par->block_align > 0) aiff->block_duration = av_get_audio_frame_duration2(par, par->block_align); }   if (!par->block_align) par->block_align = (av_get_bits_per_sample(par->codec_id) * par->channels) >> 3; if (aiff->block_duration) { par->bit_rate = par->sample_rate * (par->block_align << 3) / aiff->block_duration; }   if (size) avio_skip(pb, size); return num_frames; }