enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
{
enum AVCodecID id;
id = ff_codec_get_id(ff_codec_wav_tags, tag);
if (id <= 0)
return id;
if (id == AV_CODEC_ID_PCM_S16LE)
id = ff_get_pcm_codec_id(bps, 0, 0, ~1);
else if (id == AV_CODEC_ID_PCM_F32LE)
id = ff_get_pcm_codec_id(bps, 1, 0, 0);
if (id == AV_CODEC_ID_ADPCM_IMA_WAV && bps == 8)
id = AV_CODEC_ID_PCM_ZORK;
return id;
}
static int pvf_read_header(AVFormatContext *s)
{
char buffer[32];
AVStream *st;
int bps, channels, sample_rate;
avio_skip(s->pb, 5);
ff_get_line(s->pb, buffer, sizeof(buffer));
if (sscanf(buffer, "%d %d %d",
&channels,
&sample_rate,
&bps) != 3)
return AVERROR_INVALIDDATA;
if (channels <= 0 || bps <= 0 || sample_rate <= 0)
return AVERROR_INVALIDDATA;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->channels = channels;
st->codec->sample_rate = sample_rate;
st->codec->codec_id = ff_get_pcm_codec_id(bps, 0, 1, 0xFFFF);
st->codec->bits_per_coded_sample = bps;
st->codec->block_align = bps * st->codec->channels / 8;
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
return 0;
}
static int avr_read_header(AVFormatContext *s)
{
uint16_t chan, sign, bps;
AVStream *st;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
avio_skip(s->pb, 4); // magic
avio_skip(s->pb, 8); // sample_name
chan = avio_rb16(s->pb);
if (!chan) {
st->codecpar->channels = 1;
} else if (chan == 0xFFFFu) {
st->codecpar->channels = 2;
} else {
avpriv_request_sample(s, "chan %d", chan);
return AVERROR_PATCHWELCOME;
}
st->codecpar->bits_per_coded_sample = bps = avio_rb16(s->pb);
sign = avio_rb16(s->pb);
avio_skip(s->pb, 2); // loop
avio_skip(s->pb, 2); // midi
avio_skip(s->pb, 1); // replay speed
st->codecpar->sample_rate = avio_rb24(s->pb);
avio_skip(s->pb, 4 * 3);
avio_skip(s->pb, 2 * 3);
avio_skip(s->pb, 20);
avio_skip(s->pb, 64);
st->codecpar->codec_id = ff_get_pcm_codec_id(bps, 0, 1, sign);
if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
avpriv_request_sample(s, "Bps %d and sign %d", bps, sign);
return AVERROR_PATCHWELCOME;
}
st->codecpar->block_align = bps * st->codecpar->channels / 8;
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
return 0;
}
static int nist_read_header(AVFormatContext *s)
{
char buffer[32], coding[32] = "pcm", format[32] = "01";
int bps = 0, be = 0;
int32_t header_size = -1;
AVStream *st;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
ff_get_line(s->pb, buffer, sizeof(buffer));
ff_get_line(s->pb, buffer, sizeof(buffer));
sscanf(buffer, "%"SCNd32, &header_size);
if (header_size <= 0)
return AVERROR_INVALIDDATA;
while (!avio_feof(s->pb)) {
ff_get_line(s->pb, buffer, sizeof(buffer));
if (avio_tell(s->pb) >= header_size)
return AVERROR_INVALIDDATA;
if (!memcmp(buffer, "end_head", 8)) {
if (!st->codec->bits_per_coded_sample)
st->codec->bits_per_coded_sample = bps << 3;
if (!av_strcasecmp(coding, "pcm")) {
st->codec->codec_id = ff_get_pcm_codec_id(st->codec->bits_per_coded_sample,
0, be, 0xFFFF);
} else if (!av_strcasecmp(coding, "alaw")) {
st->codec->codec_id = AV_CODEC_ID_PCM_ALAW;
} else if (!av_strcasecmp(coding, "ulaw") ||
!av_strcasecmp(coding, "mu-law")) {
st->codec->codec_id = AV_CODEC_ID_PCM_MULAW;
} else {
avpriv_request_sample(s, "coding %s", coding);
}
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
st->codec->block_align = st->codec->bits_per_coded_sample * st->codec->channels / 8;
if (avio_tell(s->pb) > header_size)
return AVERROR_INVALIDDATA;
avio_skip(s->pb, header_size - avio_tell(s->pb));
return 0;
} else if (!memcmp(buffer, "channel_count", 13)) {
sscanf(buffer, "%*s %*s %"SCNd32, &st->codec->channels);
} else if (!memcmp(buffer, "sample_byte_format", 18)) {
sscanf(buffer, "%*s %*s %31s", format);
if (!av_strcasecmp(format, "01")) {
be = 0;
} else if (!av_strcasecmp(format, "10")) {
be = 1;
} else if (av_strcasecmp(format, "1")) {
avpriv_request_sample(s, "sample byte format %s", format);
return AVERROR_PATCHWELCOME;
}
} else if (!memcmp(buffer, "sample_coding", 13)) {
sscanf(buffer, "%*s %*s %31s", coding);
} else if (!memcmp(buffer, "sample_count", 12)) {
sscanf(buffer, "%*s %*s %"SCNd64, &st->duration);
} else if (!memcmp(buffer, "sample_n_bytes", 14)) {
sscanf(buffer, "%*s %*s %"SCNd32, &bps);
} else if (!memcmp(buffer, "sample_rate", 11)) {
sscanf(buffer, "%*s %*s %"SCNd32, &st->codec->sample_rate);
} else if (!memcmp(buffer, "sample_sig_bits", 15)) {
sscanf(buffer, "%*s %*s %"SCNd32, &st->codec->bits_per_coded_sample);
} else {
char key[32], value[32];
if (sscanf(buffer, "%31s %*s %31s", key, value) == 3) {
av_dict_set(&s->metadata, key, value, AV_DICT_APPEND);
} else {
av_log(s, AV_LOG_ERROR, "Failed to parse '%s' as metadata\n", buffer);
}
}
}
return AVERROR_EOF;
}
/**
* @brief read until we found all data needed for decoding
* @param vst video stream of which to change parameters
* @param ast video stream of which to change parameters
* @param myth set if this is a MythTVVideo format file
* @return 0 or AVERROR code
*/
static int get_codec_data(AVIOContext *pb, AVStream *vst,
AVStream *ast, int myth)
{
nuv_frametype frametype;
if (!vst && !myth)
return 1; // no codec data needed
while (!avio_feof(pb)) {
int size, subtype;
frametype = avio_r8(pb);
switch (frametype) {
case NUV_EXTRADATA:
subtype = avio_r8(pb);
avio_skip(pb, 6);
size = PKTSIZE(avio_rl32(pb));
if (vst && subtype == 'R') {
if (vst->codec->extradata) {
av_freep(&vst->codec->extradata);
vst->codec->extradata_size = 0;
}
if (ff_get_extradata(vst->codec, pb, size) < 0)
return AVERROR(ENOMEM);
size = 0;
if (!myth)
return 0;
}
break;
case NUV_MYTHEXT:
avio_skip(pb, 7);
size = PKTSIZE(avio_rl32(pb));
if (size != 128 * 4)
break;
avio_rl32(pb); // version
if (vst) {
vst->codec->codec_tag = avio_rl32(pb);
vst->codec->codec_id =
ff_codec_get_id(ff_codec_bmp_tags, vst->codec->codec_tag);
if (vst->codec->codec_tag == MKTAG('R', 'J', 'P', 'G'))
vst->codec->codec_id = AV_CODEC_ID_NUV;
} else
avio_skip(pb, 4);
if (ast) {
int id;
ast->codec->codec_tag = avio_rl32(pb);
ast->codec->sample_rate = avio_rl32(pb);
ast->codec->bits_per_coded_sample = avio_rl32(pb);
ast->codec->channels = avio_rl32(pb);
ast->codec->channel_layout = 0;
id = ff_wav_codec_get_id(ast->codec->codec_tag,
ast->codec->bits_per_coded_sample);
if (id == AV_CODEC_ID_NONE) {
id = ff_codec_get_id(nuv_audio_tags, ast->codec->codec_tag);
if (id == AV_CODEC_ID_PCM_S16LE)
id = ff_get_pcm_codec_id(ast->codec->bits_per_coded_sample,
0, 0, ~1);
}
ast->codec->codec_id = id;
ast->need_parsing = AVSTREAM_PARSE_FULL;
} else
avio_skip(pb, 4 * 4);
size -= 6 * 4;
avio_skip(pb, size);
return 0;
case NUV_SEEKP:
size = 11;
break;
default:
avio_skip(pb, 7);
size = PKTSIZE(avio_rl32(pb));
break;
}
avio_skip(pb, size);
}
return 0;
}
