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cosmetics: don't needlessly open new blocks

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Originally committed as revision 7836 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2007-02-05 19:55:15 +00:00
parent ac49ddc60d
commit 8af23633a2
1 changed files with 43 additions and 48 deletions
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91
libavcodec/dtsdec.c
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@ -208,10 +208,15 @@ dts_decode_frame(AVCodecContext * avctx, void *data, int *data_size,
int bit_rate;
int len;
dts_state_t *state = avctx->priv_data;
level_t level;
sample_t bias;
int i;
*data_size = 0;
while(1) {
int length;
len = end - start;
if(!len)
break;
@ -225,60 +230,50 @@ dts_decode_frame(AVCodecContext * avctx, void *data, int *data_size,
if(bufpos != buf + HEADER_SIZE)
break;
{
int length;
length =
dts_syncinfo(state, buf, &flags, &sample_rate, &bit_rate,
&frame_length);
if(!length) {
av_log(NULL, AV_LOG_INFO, "skip\n");
for(bufptr = buf; bufptr < buf + HEADER_SIZE - 1; bufptr++)
bufptr[0] = bufptr[1];
continue;
}
bufpos = buf + length;
length = dts_syncinfo(state, buf, &flags, &sample_rate, &bit_rate,
&frame_length);
if(!length) {
av_log(NULL, AV_LOG_INFO, "skip\n");
for(bufptr = buf; bufptr < buf + HEADER_SIZE - 1; bufptr++)
bufptr[0] = bufptr[1];
continue;
}
bufpos = buf + length;
}
{
level_t level;
sample_t bias;
int i;
flags = 2; /* ???????????? */
level = CONVERT_LEVEL;
bias = CONVERT_BIAS;
flags = 2; /* ???????????? */
level = CONVERT_LEVEL;
bias = CONVERT_BIAS;
flags |= DTS_ADJUST_LEVEL;
if(dts_frame(state, buf, &flags, &level, bias))
goto error;
avctx->sample_rate = sample_rate;
avctx->channels = channels_multi(flags);
avctx->bit_rate = bit_rate;
for(i = 0; i < dts_blocks_num(state); i++) {
if(dts_block(state))
goto error;
{
int chans;
chans = channels_multi(flags);
convert2s16_multi(dts_samples(state), out_samples,
flags & (DTS_CHANNEL_MASK | DTS_LFE));
out_samples += 256 * chans;
*data_size += 256 * sizeof(int16_t) * chans;
}
}
bufptr = buf;
bufpos = buf + HEADER_SIZE;
return start - buff;
error:
av_log(NULL, AV_LOG_ERROR, "error\n");
bufptr = buf;
bufpos = buf + HEADER_SIZE;
flags |= DTS_ADJUST_LEVEL;
if(dts_frame(state, buf, &flags, &level, bias)) {
av_log(avctx, AV_LOG_ERROR, "dts_frame() failed\n");
goto end;
}
avctx->sample_rate = sample_rate;
avctx->channels = channels_multi(flags);
avctx->bit_rate = bit_rate;
for(i = 0; i < dts_blocks_num(state); i++) {
int chans;
if(dts_block(state)) {
av_log(avctx, AV_LOG_ERROR, "dts_block() failed\n");
goto end;
}
chans = channels_multi(flags);
convert2s16_multi(dts_samples(state), out_samples,
flags & (DTS_CHANNEL_MASK | DTS_LFE));
out_samples += 256 * chans;
*data_size += 256 * sizeof(int16_t) * chans;
}
end:
bufptr = buf;
bufpos = buf + HEADER_SIZE;
return start - buff;
}