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vmdaudio: move all silence chunk handling to vmdaudio_loadsound().

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Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
This commit is contained in:
Justin Ruggles 2011-02-23 13:11:08 -05:00 committed by Ronald S. Bultje
parent 8e9027d266
commit 762b386e4a
1 changed files with 9 additions and 14 deletions
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23
libavcodec/vmdav.c
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@ -477,13 +477,15 @@ static void vmdaudio_decode_audio(VmdAudioContext *s, unsigned char *data,
}
static int vmdaudio_loadsound(VmdAudioContext *s, unsigned char *data,
const uint8_t *buf, int silence, int data_size)
const uint8_t *buf, int silent_chunks, int data_size)
{
int i;
int silent_size = s->block_align * silent_chunks * 2;
if (silence) {
memset(data, 0, data_size * 2);
} else {
if (silent_chunks) {
memset(data, 0, silent_size);
data += silent_size;
}
if (s->bits == 16)
vmdaudio_decode_audio(s, data, buf, data_size, s->channels == 2);
else {
@ -493,9 +495,8 @@ static int vmdaudio_loadsound(VmdAudioContext *s, unsigned char *data,
*data++ = buf[i] + 0x80;
}
}
}
return data_size * 2;
return silent_size + data_size * 2;
}
static int vmdaudio_decode_frame(AVCodecContext *avctx,
@ -528,21 +529,15 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx,
} else if (block_type == BLOCK_TYPE_INITIAL) {
/* initial chunk, may contain audio and silence */
uint32_t flags = AV_RB32(buf);
int raw_block_size = s->block_align *
(av_get_bits_per_sample_fmt(avctx->sample_fmt) / 8);
int silent_chunks = av_popcount(flags);
buf += 4;
buf_size -= 4;
if(*data_size < (s->block_align*silent_chunks + buf_size) * 2)
return -1;
*data_size = 0;
memset(output_samples, 0, raw_block_size * silent_chunks);
output_samples += raw_block_size * silent_chunks;
*data_size = raw_block_size * silent_chunks;
*data_size += vmdaudio_loadsound(s, output_samples, buf, 0, buf_size);
*data_size = vmdaudio_loadsound(s, output_samples, buf, silent_chunks, buf_size);
} else if (block_type == BLOCK_TYPE_SILENCE) {
/* silent chunk */
*data_size = vmdaudio_loadsound(s, output_samples, buf, 1, s->block_align);
*data_size = vmdaudio_loadsound(s, output_samples, buf, 1, 0);
}
return avpkt->size;