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Rearrange parameter logic 

Originally committed as revision 13979 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Benjamin Larsson 2008-06-25 19:57:57 +00:00
parent a9d9aa3613
commit de8c8181a9
1 changed files with 16 additions and 14 deletions
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30
libavformat/oma.c
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@ -67,7 +67,7 @@ static int oma_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
static const uint16_t srate_tab[6] = {320,441,480,882,960,0};
int ret, ea3_taglen, EA3_pos, framesize, jsflag, samplerate, channel_id;
int ret, ea3_taglen, EA3_pos, framesize, jsflag, samplerate;
uint32_t codec_params;
int16_t eid;
uint8_t buf[EA3_HEADER_SIZE];
@ -101,21 +101,27 @@ static int oma_read_header(AVFormatContext *s,
}
codec_params = AV_RB24(&buf[33]);
channel_id = (codec_params >> 10) & 7;
samplerate = srate_tab[(codec_params >> 13) & 7]*100;
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
st->start_time = 0;
st->codec->codec_type = CODEC_TYPE_AUDIO;
st->codec->codec_tag = buf[32];
st->codec->codec_id = codec_get_id(codec_oma_tags, st->codec->codec_tag);
switch (buf[32]) {
case OMA_CODECID_ATRAC3:
samplerate = srate_tab[(codec_params >> 13) & 7]*100;
if (samplerate != 44100)
av_log(s, AV_LOG_ERROR, "Unsupported sample rate, send sample file to developers: %d\n", samplerate);
framesize = (codec_params & 0x3FF) * 8;
jsflag = (codec_params >> 17) & 1; /* get stereo coding mode, 1 for joint-stereo */
channel_id = 2;
st->codec->channels = 2;
st->codec->sample_rate = samplerate;
st->codec->bit_rate = st->codec->sample_rate * framesize * 8 / 1024;
/* fake the atrac3 extradata (wav format, makes stream copy to wav work) */
st->codec->extradata_size = 14;
@ -130,9 +136,15 @@ static int oma_read_header(AVFormatContext *s,
AV_WL16(&edata[8], jsflag); // coding mode
AV_WL16(&edata[10], 1); // always 1
// AV_WL16(&edata[12], 0); // always 0
av_set_pts_info(st, 64, 1, st->codec->sample_rate);
break;
case OMA_CODECID_ATRAC3P:
st->codec->channels = (codec_params >> 10) & 7;
framesize = ((codec_params & 0x3FF) * 8) + 8;
st->codec->sample_rate = srate_tab[(codec_params >> 13) & 7]*100;
st->codec->bit_rate = st->codec->sample_rate * framesize * 8 / 1024;
av_set_pts_info(st, 64, 1, st->codec->sample_rate);
av_log(s, AV_LOG_ERROR, "Unsupported codec ATRAC3+!\n");
break;
default:
@ -141,17 +153,7 @@ static int oma_read_header(AVFormatContext *s,
break;
}
st->codec->codec_type = CODEC_TYPE_AUDIO;
st->codec->codec_tag = buf[32];
st->codec->codec_id = codec_get_id(codec_oma_tags, st->codec->codec_tag);
st->codec->channels = channel_id;
st->codec->sample_rate = samplerate;
st->codec->bit_rate = samplerate * framesize * 8 / 1024;
st->codec->block_align = framesize;
st->start_time = 0;
av_set_pts_info(st, 64, 1, st->codec->sample_rate);
url_fseek(s->pb, EA3_pos + EA3_HEADER_SIZE, SEEK_SET);
return 0;