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adxenc: cosmetics: pretty-printing

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This commit is contained in:
Justin Ruggles 2011-12-19 09:39:05 -05:00
parent 25edfc88e3
commit a85ab8ad45
1 changed files with 46 additions and 41 deletions
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87
libavcodec/adxenc.c
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@ -39,40 +39,45 @@ static void adx_encode(ADXContext *c, uint8_t *adx, const int16_t *wav,
PutBitContext pb;
int scale;
int i;
int s0,s1,s2,d;
int max=0;
int min=0;
int s0, s1, s2, d;
int max = 0;
int min = 0;
int data[32];
s1 = prev->s1;
s2 = prev->s2;
for(i=0;i<32;i++) {
for (i = 0; i < 32; i++) {
s0 = wav[i];
d = ((s0 << COEFF_BITS) - c->coeff[0] * s1 - c->coeff[1] * s2) >> COEFF_BITS;
data[i]=d;
if (max<d) max=d;
if (min>d) min=d;
data[i] = d;
if (max < d)
max = d;
if (min > d)
min = d;
s2 = s1;
s1 = s0;
}
prev->s1 = s1;
prev->s2 = s2;
if (max==0 && min==0) {
memset(adx,0,18);
if (max == 0 && min == 0) {
memset(adx, 0, 18);
return;
}
if (max/7>-min/8) scale = max/7;
else scale = -min/8;
if (max / 7 > -min / 8)
scale = max / 7;
else
scale = -min / 8;
if (scale==0) scale=1;
if (scale == 0)
scale = 1;
AV_WB16(adx, scale);
init_put_bits(&pb, adx + 2, 16);
for (i = 0; i < 32; i++)
put_sbits(&pb, 4, av_clip(data[i]/scale, -8, 7));
put_sbits(&pb, 4, av_clip(data[i] / scale, -8, 7));
flush_put_bits(&pb);
}
@ -80,16 +85,16 @@ static int adx_encode_header(AVCodecContext *avctx, uint8_t *buf, int bufsize)
{
ADXContext *c = avctx->priv_data;
AV_WB32(buf+0x00,0x80000000|0x20);
AV_WB32(buf+0x04,0x03120400|avctx->channels);
AV_WB32(buf+0x08,avctx->sample_rate);
AV_WB32(buf+0x0c,0);
AV_WB32(buf + 0x00, 0x80000000 | 0x20);
AV_WB32(buf + 0x04, 0x03120400 | avctx->channels);
AV_WB32(buf + 0x08, avctx->sample_rate);
AV_WB32(buf + 0x0c, 0);
AV_WB16(buf + 0x10, c->cutoff);
AV_WB32(buf + 0x12, 0x03000000);
AV_WB32(buf + 0x16, 0x00000000);
AV_WB32(buf + 0x1a, 0x00000000);
memcpy (buf + 0x1e, "(c)CRI", 6);
return 0x20+4;
return 0x20 + 4;
}
static av_cold int adx_encode_init(AVCodecContext *avctx)
@ -100,8 +105,8 @@ static av_cold int adx_encode_init(AVCodecContext *avctx)
return -1;
avctx->frame_size = 32;
avctx->coded_frame= avcodec_alloc_frame();
avctx->coded_frame->key_frame= 1;
avctx->coded_frame = avcodec_alloc_frame();
avctx->coded_frame->key_frame = 1;
/* the cutoff can be adjusted, but this seems to work pretty well */
c->cutoff = 500;
@ -113,49 +118,48 @@ static av_cold int adx_encode_init(AVCodecContext *avctx)
static av_cold int adx_encode_close(AVCodecContext *avctx)
{
av_freep(&avctx->coded_frame);
return 0;
}
static int adx_encode_frame(AVCodecContext *avctx,
uint8_t *frame, int buf_size, void *data)
static int adx_encode_frame(AVCodecContext *avctx, uint8_t *frame,
int buf_size, void *data)
{
ADXContext *c = avctx->priv_data;
ADXContext *c = avctx->priv_data;
const int16_t *samples = data;
uint8_t *dst = frame;
int rest = avctx->frame_size;
if (!c->header_parsed) {
int hdrsize = adx_encode_header(avctx,dst,buf_size);
dst+=hdrsize;
int hdrsize = adx_encode_header(avctx, dst, buf_size);
dst += hdrsize;
c->header_parsed = 1;
}
if (avctx->channels==1) {
while(rest>=32) {
if (avctx->channels == 1) {
while (rest >= 32) {
adx_encode(c, dst, samples, c->prev);
dst+=18;
samples+=32;
rest-=32;
dst += 18;
samples += 32;
rest -= 32;
}
} else {
while(rest>=32*2) {
while (rest >= 32*2) {
int16_t tmpbuf[32*2];
int i;
for(i=0;i<32;i++) {
tmpbuf[i] = samples[i*2];
for (i = 0; i < 32; i++) {
tmpbuf[i ] = samples[i*2 ];
tmpbuf[i+32] = samples[i*2+1];
}
adx_encode(c, dst, tmpbuf, c->prev);
adx_encode(c, dst, tmpbuf, c->prev );
adx_encode(c, dst + 18, tmpbuf + 32, c->prev + 1);
dst+=18*2;
samples+=32*2;
rest-=32*2;
dst += 18*2;
samples += 32*2;
rest -= 32*2;
}
}
return dst-frame;
return dst - frame;
}
AVCodec ff_adpcm_adx_encoder = {
@ -166,6 +170,7 @@ AVCodec ff_adpcm_adx_encoder = {
.init = adx_encode_init,
.encode = adx_encode_frame,
.close = adx_encode_close,
.sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("SEGA CRI ADX ADPCM"),
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16,
AV_SAMPLE_FMT_NONE },
.long_name = NULL_IF_CONFIG_SMALL("SEGA CRI ADX ADPCM"),
};