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stride align cleanup 

Originally committed as revision 3640 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-10-26 12:47:56 +00:00
parent ec7eb8966c
commit 3237f73183
2 changed files with 13 additions and 9 deletions
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11
libavcodec/dsputil.h
View File

@ -426,6 +426,7 @@ static inline void emms(void)
}
#define __align8 __attribute__ ((aligned (8)))
#define STRIDE_ALIGN 8
void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx);
void dsputil_init_pix_mmx(DSPContext* c, AVCodecContext *avctx);
@ -435,6 +436,7 @@ void dsputil_init_pix_mmx(DSPContext* c, AVCodecContext *avctx);
/* This is to use 4 bytes read to the IDCT pointers for some 'zero'
line optimizations */
#define __align8 __attribute__ ((aligned (4)))
#define STRIDE_ALIGN 4
void dsputil_init_armv4l(DSPContext* c, AVCodecContext *avctx);
@ -442,6 +444,7 @@ void dsputil_init_armv4l(DSPContext* c, AVCodecContext *avctx);
/* SPARC/VIS IDCT needs 8-byte aligned DCT blocks */
#define __align8 __attribute__ ((aligned (8)))
#define STRIDE_ALIGN 8
void dsputil_init_mlib(DSPContext* c, AVCodecContext *avctx);
@ -449,11 +452,13 @@ void dsputil_init_mlib(DSPContext* c, AVCodecContext *avctx);
/* SPARC/VIS IDCT needs 8-byte aligned DCT blocks */
#define __align8 __attribute__ ((aligned (8)))
#define STRIDE_ALIGN 8
void dsputil_init_vis(DSPContext* c, AVCodecContext *avctx);
#elif defined(ARCH_ALPHA)
#define __align8 __attribute__ ((aligned (8)))
#define STRIDE_ALIGN 8
void dsputil_init_alpha(DSPContext* c, AVCodecContext *avctx);
@ -470,24 +475,28 @@ extern int mm_flags;
#endif
#define __align8 __attribute__ ((aligned (16)))
#define STRIDE_ALIGN 16
void dsputil_init_ppc(DSPContext* c, AVCodecContext *avctx);
#elif defined(HAVE_MMI)
#define __align8 __attribute__ ((aligned (16)))
#define STRIDE_ALIGN 16
void dsputil_init_mmi(DSPContext* c, AVCodecContext *avctx);
#elif defined(ARCH_SH4)
#define __align8 __attribute__ ((aligned (8)))
#define STRIDE_ALIGN 8
void dsputil_init_sh4(DSPContext* c, AVCodecContext *avctx);
#else
#define __align8
#define __align8 __attribute__ ((aligned (8)))
#define STRIDE_ALIGN 8
#endif

11
libavcodec/utils.c
View File

@ -219,7 +219,7 @@ int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
buf->last_pic_num= *picture_number;
}else{
int h_chroma_shift, v_chroma_shift;
int s_align, pixel_size;
int pixel_size;
avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
@ -242,11 +242,6 @@ int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
}
avcodec_align_dimensions(s, &w, &h);
#if defined(ARCH_POWERPC) || defined(HAVE_MMI) //FIXME some cleaner check
s_align= 16;
#else
s_align= 8;
#endif
if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
w+= EDGE_WIDTH*2;
@ -260,7 +255,7 @@ int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
const int v_shift= i==0 ? 0 : v_chroma_shift;
//FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, s_align<<(h_chroma_shift-h_shift));
buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, STRIDE_ALIGN<<(h_chroma_shift-h_shift));
buf->base[i]= av_mallocz((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
if(buf->base[i]==NULL) return -1;
@ -269,7 +264,7 @@ int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
if(s->flags&CODEC_FLAG_EMU_EDGE)
buf->data[i] = buf->base[i];
else
buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), s_align);
buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), STRIDE_ALIGN);
}
pic->age= 256*256*256*64;
}