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vmdaudio: use macros and a local variable for block type.

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Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
This commit is contained in:
Justin Ruggles 2011-02-23 13:11:04 -05:00 committed by Ronald S. Bultje
parent 6989cb2dae
commit dd1af5136f
1 changed files with 10 additions and 3 deletions
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13
libavcodec/vmdav.c
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@ -414,6 +414,10 @@ static av_cold int vmdvideo_decode_end(AVCodecContext *avctx)
* Audio Decoder
*/
#define BLOCK_TYPE_AUDIO 1
#define BLOCK_TYPE_INITIAL 2
#define BLOCK_TYPE_SILENCE 3
typedef struct VmdAudioContext {
AVCodecContext *avctx;
int channels;
@ -504,6 +508,7 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx,
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
VmdAudioContext *s = avctx->priv_data;
int block_type;
unsigned char *output_samples = (unsigned char *)data;
/* point to the start of the encoded data */
@ -512,10 +517,12 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx,
if (buf_size < 16)
return buf_size;
if (buf[6] == 1) {
block_type = buf[6];
if (block_type == BLOCK_TYPE_AUDIO) {
/* the chunk contains audio */
*data_size = vmdaudio_loadsound(s, output_samples, p, 0, buf_size - 16);
} else if (buf[6] == 2) {
} else if (block_type == BLOCK_TYPE_INITIAL) {
/* initial chunk, may contain audio and silence */
uint32_t flags = AV_RB32(p);
int raw_block_size = s->block_align *
@ -528,7 +535,7 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx,
output_samples += raw_block_size * silent_chunks;
*data_size = raw_block_size * silent_chunks;
*data_size += vmdaudio_loadsound(s, output_samples, p + 4, 0, buf_size - 20);
} else if (buf[6] == 3) {
} else if (block_type == BLOCK_TYPE_SILENCE) {
/* silent chunk */
*data_size = vmdaudio_loadsound(s, output_samples, p, 1, s->block_align);
}