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Code Issues Releases Activity

Move idct block array variable onto rtjpeg_decode_frame_yuv420 stack since

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it is only used there and is only 128 byte large.
Also make it aligned to fix playback with altivec.

Originally committed as revision 6902 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2006-11-05 16:18:37 +00:00
parent bc52b0c518
commit c9ec7564f0
2 changed files with 13 additions and 13 deletions
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25
libavcodec/rtjpeg.c
View File

@ -98,6 +98,7 @@ static inline int get_block(GetBitContext *gb, DCTELEM *block, uint8_t *scan,
*/ */
int rtjpeg_decode_frame_yuv420(RTJpegContext *c, AVFrame *f, int rtjpeg_decode_frame_yuv420(RTJpegContext *c, AVFrame *f,
uint8_t *buf, int buf_size) { uint8_t *buf, int buf_size) {
DECLARE_ALIGNED_16(DCTELEM, block[64]);
GetBitContext gb; GetBitContext gb;
int w = c->w / 16, h = c->h / 16; int w = c->w / 16, h = c->h / 16;
int x, y; int x, y;
@ -106,23 +107,23 @@ int rtjpeg_decode_frame_yuv420(RTJpegContext *c, AVFrame *f,
init_get_bits(&gb, buf, buf_size * 8); init_get_bits(&gb, buf, buf_size * 8);
for (y = 0; y < h; y++) { for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) { for (x = 0; x < w; x++) {
if (get_block(&gb, c->block, c->scan, c->lquant)) if (get_block(&gb, block, c->scan, c->lquant))
c->dsp->idct_put(y1, f->linesize[0], c->block); c->dsp->idct_put(y1, f->linesize[0], block);
y1 += 8; y1 += 8;
if (get_block(&gb, c->block, c->scan, c->lquant)) if (get_block(&gb, block, c->scan, c->lquant))
c->dsp->idct_put(y1, f->linesize[0], c->block); c->dsp->idct_put(y1, f->linesize[0], block);
y1 += 8; y1 += 8;
if (get_block(&gb, c->block, c->scan, c->lquant)) if (get_block(&gb, block, c->scan, c->lquant))
c->dsp->idct_put(y2, f->linesize[0], c->block); c->dsp->idct_put(y2, f->linesize[0], block);
y2 += 8; y2 += 8;
if (get_block(&gb, c->block, c->scan, c->lquant)) if (get_block(&gb, block, c->scan, c->lquant))
c->dsp->idct_put(y2, f->linesize[0], c->block); c->dsp->idct_put(y2, f->linesize[0], block);
y2 += 8; y2 += 8;
if (get_block(&gb, c->block, c->scan, c->cquant)) if (get_block(&gb, block, c->scan, c->cquant))
c->dsp->idct_put(u, f->linesize[1], c->block); c->dsp->idct_put(u, f->linesize[1], block);
u += 8; u += 8;
if (get_block(&gb, c->block, c->scan, c->cquant)) if (get_block(&gb, block, c->scan, c->cquant))
c->dsp->idct_put(v, f->linesize[2], c->block); c->dsp->idct_put(v, f->linesize[2], block);
v += 8; v += 8;
} }
y1 += 2 * 8 * (f->linesize[0] - w); y1 += 2 * 8 * (f->linesize[0] - w);

1
libavcodec/rtjpeg.h
View File

@ -25,7 +25,6 @@
typedef struct { typedef struct {
int w, h; int w, h;
DSPContext *dsp; DSPContext *dsp;
DCTELEM block[64];
uint8_t scan[64]; uint8_t scan[64];
uint32_t lquant[64]; uint32_t lquant[64];
uint32_t cquant[64]; uint32_t cquant[64];