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 qcp_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
ByteIOContext *pb = s->pb;
QCPContext *c = s->priv_data;
AVStream *st = av_new_stream(s, 0);
uint8_t buf[16];
int i, nb_rates;
if (!st)
return AVERROR(ENOMEM);
get_be32(pb); // "RIFF"
s->file_size = get_le32(pb) + 8;
url_fskip(pb, 8 + 4 + 1 + 1); // "QLCMfmt " + chunk-size + major-version + minor-version
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->channels = 1;
get_buffer(pb, buf, 16);
if (is_qcelp_13k_guid(buf)) {
st->codec->codec_id = CODEC_ID_QCELP;
} else if (!memcmp(buf, guid_evrc, 16)) {
av_log(s, AV_LOG_ERROR, "EVRC codec is not supported.\n");
return AVERROR_PATCHWELCOME;
} else if (!memcmp(buf, guid_smv, 16)) {
av_log(s, AV_LOG_ERROR, "SMV codec is not supported.\n");
return AVERROR_PATCHWELCOME;
} else {
av_log(s, AV_LOG_ERROR, "Unknown codec GUID.\n");
return AVERROR_INVALIDDATA;
}
url_fskip(pb, 2 + 80); // codec-version + codec-name
st->codec->bit_rate = get_le16(pb);
s->packet_size = get_le16(pb);
url_fskip(pb, 2); // block-size
st->codec->sample_rate = get_le16(pb);
url_fskip(pb, 2); // sample-size
memset(c->rates_per_mode, -1, sizeof(c->rates_per_mode));
nb_rates = get_le32(pb);
nb_rates = FFMIN(nb_rates, 8);
for (i=0; i<nb_rates; i++) {
int size = get_byte(pb);
int mode = get_byte(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;
}
url_fskip(pb, 16 - 2*nb_rates + 20); // empty entries of rate-map-table + reserved
return 0;
}