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Code Issues Releases Activity

remove b4_stride/mb_stride.

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correct mb_xy to use mb_width.
tighten allocations.
reduce the amount of zeroing.

Originally committed as revision 24760 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Pascal Massimino 2010-08-11 08:27:38 +00:00
parent b4f81b7429
commit aa93c52c21
1 changed files with 10 additions and 19 deletions
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29
libavcodec/vp8.c
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@ -87,12 +87,10 @@ typedef struct {
VP8Macroblock *macroblocks;
VP8Macroblock *macroblocks_base;
VP8FilterStrength *filter_strength;
int mb_stride;
uint8_t *intra4x4_pred_mode_top;
uint8_t intra4x4_pred_mode_left[4];
uint8_t *segmentation_map;
int b4_stride;
/**
* Cache of the top row needed for intra prediction
@ -235,17 +233,12 @@ static int update_dimensions(VP8Context *s, int width, int height)
s->mb_width = (s->avctx->coded_width +15) / 16;
s->mb_height = (s->avctx->coded_height+15) / 16;
// we allocate a border around the top/left of intra4x4 modes
// this is 4 blocks for intra4x4 to keep 4-byte alignment for fill_rectangle
s->mb_stride = s->mb_width+1;
s->b4_stride = 4*s->mb_stride;
s->macroblocks_base = av_mallocz((s->mb_stride+s->mb_height*2+2)*sizeof(*s->macroblocks));
s->filter_strength = av_mallocz(s->mb_stride*sizeof(*s->filter_strength));
s->macroblocks_base = av_mallocz((s->mb_width+s->mb_height*2+1)*sizeof(*s->macroblocks));
s->filter_strength = av_mallocz(s->mb_width*sizeof(*s->filter_strength));
s->intra4x4_pred_mode_top = av_mallocz(s->mb_width*4);
s->top_nnz = av_mallocz(s->mb_width*sizeof(*s->top_nnz));
s->top_border = av_mallocz((s->mb_width+1)*sizeof(*s->top_border));
s->segmentation_map = av_mallocz(s->mb_stride*s->mb_height);
s->segmentation_map = av_mallocz(s->mb_width*s->mb_height);
if (!s->macroblocks_base || !s->filter_strength || !s->intra4x4_pred_mode_top ||
!s->top_nnz || !s->top_border || !s->segmentation_map)
@ -535,7 +528,7 @@ void clamp_mv(VP8Context *s, VP56mv *dst, const VP56mv *src, int mb_x, int mb_y)
}
static av_always_inline
void find_near_mvs(VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y,
void find_near_mvs(VP8Context *s, VP8Macroblock *mb,
VP56mv near[2], VP56mv *best, uint8_t cnt[4])
{
VP8Macroblock *mb_edge[3] = { mb + 2 /* top */,
@ -767,7 +760,7 @@ void decode_mb_mode(VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, uint8_
s->ref_count[mb->ref_frame-1]++;
// motion vectors, 16.3
find_near_mvs(s, mb, mb_x, mb_y, near, &best, cnt);
find_near_mvs(s, mb, near, &best, cnt);
if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[0]][0])) {
if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[1]][1])) {
if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[2]][2])) {
@ -1536,8 +1529,8 @@ static int vp8_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
memset(s->top_nnz, 0, s->mb_width*sizeof(*s->top_nnz));
/* Zero macroblock structures for top/left prediction from outside the frame. */
memset(s->macroblocks, 0, (s->mb_width + s->mb_height*2)*sizeof(*s->macroblocks));
/* Zero macroblock structures for top/top-left prediction from outside the frame. */
memset(s->macroblocks + s->mb_height*2 - 1, 0, (s->mb_width+1)*sizeof(*s->macroblocks));
// top edge of 127 for intra prediction
memset(s->top_border, 127, (s->mb_width+1)*sizeof(*s->top_border));
@ -1548,14 +1541,14 @@ static int vp8_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
VP56RangeCoder *c = &s->coeff_partition[mb_y & (s->num_coeff_partitions-1)];
VP8Macroblock *mb = s->macroblocks + (s->mb_height - mb_y - 1)*2;
uint8_t *segment_map = s->segmentation_map + mb_y*s->mb_stride;
int mb_xy = mb_y * s->mb_stride;
int mb_xy = mb_y*s->mb_width;
uint8_t *dst[3] = {
curframe->data[0] + 16*mb_y*s->linesize,
curframe->data[1] + 8*mb_y*s->uvlinesize,
curframe->data[2] + 8*mb_y*s->uvlinesize
};
memset(mb - 1, 0, sizeof(*mb)); // zero left macroblock
memset(s->left_nnz, 0, sizeof(s->left_nnz));
AV_WN32A(s->intra4x4_pred_mode_left, DC_PRED*0x01010101);
@ -1568,13 +1561,11 @@ static int vp8_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
memset(s->top_border, 129, sizeof(*s->top_border));
for (mb_x = 0; mb_x < s->mb_width; mb_x++, mb_xy++, mb++) {
uint8_t *segment_mb = segment_map+mb_x;
/* Prefetch the current frame, 4 MBs ahead */
s->dsp.prefetch(dst[0] + (mb_x&3)*4*s->linesize + 64, s->linesize, 4);
s->dsp.prefetch(dst[1] + (mb_x&7)*s->uvlinesize + 64, dst[2] - dst[1], 2);
decode_mb_mode(s, mb, mb_x, mb_y, segment_mb);
decode_mb_mode(s, mb, mb_x, mb_y, s->segmentation_map + mb_xy);
prefetch_motion(s, mb, mb_x, mb_y, mb_xy, VP56_FRAME_PREVIOUS);