static void parse_waveformatex(AVIOContext *pb, AVCodecContext *c)
{
ff_asf_guid subformat;
int bps = avio_rl16(pb);
if (bps)
c->bits_per_coded_sample = bps;
c->channel_layout = avio_rl32(pb); /* dwChannelMask */
ff_get_guid(pb, &subformat);
{
const uint8_t aguid[] = { FF_MEDIASUBTYPE_BASE_GUID };
if (!memcmp(subformat + 4, aguid, 12)) {
c->codec_tag = AV_RL32(subformat);
c->codec_id = ff_wav_codec_get_id(c->codec_tag,
c->bits_per_coded_sample);
} else {
c->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subformat);
if (!c->codec_id)
av_log(c, AV_LOG_WARNING,
"unknown subformat:"FF_PRI_GUID"\n",
FF_ARG_GUID(subformat));
}
}
}
static int qcp_read_header(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
QCPContext *c = s->priv_data;
AVStream *st = avformat_new_stream(s, NULL);
uint8_t buf[16];
int i, nb_rates;
if (!st)
return AVERROR(ENOMEM);
avio_rb32(pb); // "RIFF"
avio_skip(pb, 4 + 8 + 4 + 1 + 1); // filesize + "QLCMfmt " + chunk-size + major-version + minor-version
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->channels = 1;
st->codec->channel_layout = AV_CH_LAYOUT_MONO;
avio_read(pb, buf, 16);
if (is_qcelp_13k_guid(buf)) {
st->codec->codec_id = AV_CODEC_ID_QCELP;
} else if (!memcmp(buf, guid_evrc, 16)) {
st->codec->codec_id = AV_CODEC_ID_EVRC;
} else if (!memcmp(buf, guid_smv, 16)) {
st->codec->codec_id = AV_CODEC_ID_SMV;
} else if (!memcmp(buf, guid_4gv, 16)) {
st->codec->codec_id = AV_CODEC_ID_4GV;
} else {
av_log(s, AV_LOG_ERROR, "Unknown codec GUID "FF_PRI_GUID".\n",
FF_ARG_GUID(buf));
return AVERROR_INVALIDDATA;
}
avio_skip(pb, 2 + 80); // codec-version + codec-name
st->codec->bit_rate = avio_rl16(pb);
s->packet_size = avio_rl16(pb);
avio_skip(pb, 2); // block-size
st->codec->sample_rate = avio_rl16(pb);
avio_skip(pb, 2); // sample-size
memset(c->rates_per_mode, -1, sizeof(c->rates_per_mode));
nb_rates = avio_rl32(pb);
nb_rates = FFMIN(nb_rates, 8);
for (i=0; i<nb_rates; i++) {
int size = avio_r8(pb);
int mode = avio_r8(pb);
if (mode > QCP_MAX_MODE) {
av_log(s, AV_LOG_WARNING, "Unknown entry %d=>%d in rate-map-table.\n ", mode, size);
} else
c->rates_per_mode[mode] = size;
}
avio_skip(pb, 16 - 2*nb_rates + 20); // empty entries of rate-map-table + reserved
return 0;
}
static int w64_read_header(AVFormatContext *s)
{
int64_t size, data_ofs = 0;
AVIOContext *pb = s->pb;
WAVDemuxContext *wav = s->priv_data;
AVStream *st;
uint8_t guid[16];
int ret;
avio_read(pb, guid, 16);
if (memcmp(guid, ff_w64_guid_riff, 16))
return AVERROR_INVALIDDATA;
/* riff + wave + fmt + sizes */
if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8)
return AVERROR_INVALIDDATA;
avio_read(pb, guid, 16);
if (memcmp(guid, ff_w64_guid_wave, 16)) {
av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
return AVERROR_INVALIDDATA;
}
wav->w64 = 1;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
while (!url_feof(pb)) {
if (avio_read(pb, guid, 16) != 16)
break;
size = avio_rl64(pb);
if (size <= 24 || INT64_MAX - size < avio_tell(pb))
return AVERROR_INVALIDDATA;
if (!memcmp(guid, ff_w64_guid_fmt, 16)) {
/* subtract chunk header size - normal wav file doesn't count it */
ret = ff_get_wav_header(pb, st->codec, size - 24);
if (ret < 0)
return ret;
avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
} else if (!memcmp(guid, ff_w64_guid_fact, 16)) {
int64_t samples;
samples = avio_rl64(pb);
if (samples > 0)
st->duration = samples;
} else if (!memcmp(guid, ff_w64_guid_data, 16)) {
wav->data_end = avio_tell(pb) + size - 24;
data_ofs = avio_tell(pb);
if (!pb->seekable)
break;
avio_skip(pb, size - 24);
} else if (!memcmp(guid, ff_w64_guid_summarylist, 16)) {
int64_t start, end, cur;
uint32_t count, chunk_size, i;
start = avio_tell(pb);
end = start + size;
count = avio_rl32(pb);
for (i = 0; i < count; i++) {
char chunk_key[5], *value;
if (url_feof(pb) || (cur = avio_tell(pb)) < 0 || cur > end - 8 /* = tag + size */)
break;
chunk_key[4] = 0;
avio_read(pb, chunk_key, 4);
chunk_size = avio_rl32(pb);
value = av_mallocz(chunk_size + 1);
if (!value)
return AVERROR(ENOMEM);
ret = avio_get_str16le(pb, chunk_size, value, chunk_size);
avio_skip(pb, chunk_size - ret);
av_dict_set(&s->metadata, chunk_key, value, AV_DICT_DONT_STRDUP_VAL);
}
avio_skip(pb, end - avio_tell(pb));
} else {
av_log(s, AV_LOG_DEBUG, "unknown guid: "FF_PRI_GUID"\n", FF_ARG_GUID(guid));
avio_skip(pb, size - 24);
}
}
if (!data_ofs)
return AVERROR_EOF;
ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
handle_stream_probing(st);
st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
avio_seek(pb, data_ofs, SEEK_SET);
return 0;
}