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vp8: frame-multithreading.

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Tested on a Mac Pro, 2 CPUs, 2 cores each, OSX 10.6.6:

time ./ffmpeg -v 0 -vsync 0 -threads [1234] -i \
  ~/Downloads/sintel_trailer_1080p_vp8_vorbis.webm \
  -f null -vcodec rawvideo -an -
1: 0m14.630s (89.9 fps)
2: 0m8.056s (163.2 fps)
3: 0m5.882s (223.6 fps)
4: 0m4.952s (265.6 fps)

time ./ffmpeg -v 0 -vsync 0 -threads [1234] -i \
  ~/Downloads/Elephants_Dream-720p-Stereo.webm \
  -f null -vcodec rawvideo -an -
1: 1m12.962s (215.1 fps)
2: 0m44.682s (351.2 fps)
3: 0m31.183s (503.2 fps)
4: 0m25.284s (620.6 fps)

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Ronald S. Bultje 2011-05-02 09:55:52 -04:00 committed by Anton Khirnov
parent 975a1447f7
commit 4773d90421
2 changed files with 131 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

177
libavcodec/vp8.c
View File

@ -27,6 +27,7 @@
#include "vp8.h"
#include "vp8data.h"
#include "rectangle.h"
#include "thread.h"
#if ARCH_ARM
# include "arm/vp8.h"
@ -37,9 +38,11 @@ static void vp8_decode_flush(AVCodecContext *avctx)
VP8Context *s = avctx->priv_data;
int i;
for (i = 0; i < 4; i++)
if (!avctx->is_copy) {
for (i = 0; i < 5; i++)
if (s->frames[i].data[0])
avctx->release_buffer(avctx, &s->frames[i]);
ff_thread_release_buffer(avctx, &s->frames[i]);
}
memset(s->framep, 0, sizeof(s->framep));
av_freep(&s->macroblocks_base);
@ -55,12 +58,15 @@ static void vp8_decode_flush(AVCodecContext *avctx)
static int update_dimensions(VP8Context *s, int width, int height)
{
if (width != s->avctx->width ||
height != s->avctx->height) {
if (av_image_check_size(width, height, 0, s->avctx))
return AVERROR_INVALIDDATA;
vp8_decode_flush(s->avctx);
avcodec_set_dimensions(s->avctx, width, height);
}
s->mb_width = (s->avctx->coded_width +15) / 16;
s->mb_height = (s->avctx->coded_height+15) / 16;
@ -579,12 +585,14 @@ void decode_intra4x4_modes(VP8Context *s, VP56RangeCoder *c,
}
static av_always_inline
void decode_mb_mode(VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, uint8_t *segment)
void decode_mb_mode(VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, uint8_t *segment, uint8_t *ref)
{
VP56RangeCoder *c = &s->c;
if (s->segmentation.update_map)
*segment = vp8_rac_get_tree(c, vp8_segmentid_tree, s->prob->segmentid);
else
*segment = ref ? *ref : *segment;
s->segment = *segment;
mb->skip = s->mbskip_enabled ? vp56_rac_get_prob(c, s->prob->mbskip) : 0;
@ -1043,11 +1051,13 @@ static const uint8_t subpel_idx[3][8] = {
* @param mc_func motion compensation function pointers (bilinear or sixtap MC)
*/
static av_always_inline
void vp8_mc_luma(VP8Context *s, uint8_t *dst, uint8_t *src, const VP56mv *mv,
void vp8_mc_luma(VP8Context *s, uint8_t *dst, AVFrame *ref, const VP56mv *mv,
int x_off, int y_off, int block_w, int block_h,
int width, int height, int linesize,
vp8_mc_func mc_func[3][3])
{
uint8_t *src = ref->data[0];
if (AV_RN32A(mv)) {
int mx = (mv->x << 1)&7, mx_idx = subpel_idx[0][mx];
@ -1057,6 +1067,7 @@ void vp8_mc_luma(VP8Context *s, uint8_t *dst, uint8_t *src, const VP56mv *mv,
y_off += mv->y >> 2;
// edge emulation
ff_thread_await_progress(ref, (3 + y_off + block_h + subpel_idx[2][my]) >> 4, 0);
src += y_off * linesize + x_off;
if (x_off < mx_idx || x_off >= width - block_w - subpel_idx[2][mx] ||
y_off < my_idx || y_off >= height - block_h - subpel_idx[2][my]) {
@ -1066,16 +1077,20 @@ void vp8_mc_luma(VP8Context *s, uint8_t *dst, uint8_t *src, const VP56mv *mv,
src = s->edge_emu_buffer + mx_idx + linesize * my_idx;
}
mc_func[my_idx][mx_idx](dst, linesize, src, linesize, block_h, mx, my);
} else
} else {
ff_thread_await_progress(ref, (3 + y_off + block_h) >> 4, 0);
mc_func[0][0](dst, linesize, src + y_off * linesize + x_off, linesize, block_h, 0, 0);
}
}
static av_always_inline
void vp8_mc_chroma(VP8Context *s, uint8_t *dst1, uint8_t *dst2, uint8_t *src1,
uint8_t *src2, const VP56mv *mv, int x_off, int y_off,
void vp8_mc_chroma(VP8Context *s, uint8_t *dst1, uint8_t *dst2, AVFrame *ref,
const VP56mv *mv, int x_off, int y_off,
int block_w, int block_h, int width, int height, int linesize,
vp8_mc_func mc_func[3][3])
{
uint8_t *src1 = ref->data[1], *src2 = ref->data[2];
if (AV_RN32A(mv)) {
int mx = mv->x&7, mx_idx = subpel_idx[0][mx];
int my = mv->y&7, my_idx = subpel_idx[0][my];
@ -1086,6 +1101,7 @@ void vp8_mc_chroma(VP8Context *s, uint8_t *dst1, uint8_t *dst2, uint8_t *src1,
// edge emulation
src1 += y_off * linesize + x_off;
src2 += y_off * linesize + x_off;
ff_thread_await_progress(ref, (3 + y_off + block_h + subpel_idx[2][my]) >> 3, 0);
if (x_off < mx_idx || x_off >= width - block_w - subpel_idx[2][mx] ||
y_off < my_idx || y_off >= height - block_h - subpel_idx[2][my]) {
s->dsp.emulated_edge_mc(s->edge_emu_buffer, src1 - my_idx * linesize - mx_idx, linesize,
@ -1104,6 +1120,7 @@ void vp8_mc_chroma(VP8Context *s, uint8_t *dst1, uint8_t *dst2, uint8_t *src1,
mc_func[my_idx][mx_idx](dst2, linesize, src2, linesize, block_h, mx, my);
}
} else {
ff_thread_await_progress(ref, (3 + y_off + block_h) >> 3, 0);
mc_func[0][0](dst1, linesize, src1 + y_off * linesize + x_off, linesize, block_h, 0, 0);
mc_func[0][0](dst2, linesize, src2 + y_off * linesize + x_off, linesize, block_h, 0, 0);
}
@ -1120,7 +1137,7 @@ void vp8_mc_part(VP8Context *s, uint8_t *dst[3],
/* Y */
vp8_mc_luma(s, dst[0] + by_off * s->linesize + bx_off,
ref_frame->data[0], mv, x_off + bx_off, y_off + by_off,
ref_frame, mv, x_off + bx_off, y_off + by_off,
block_w, block_h, width, height, s->linesize,
s->put_pixels_tab[block_w == 8]);
@ -1134,8 +1151,8 @@ void vp8_mc_part(VP8Context *s, uint8_t *dst[3],
width >>= 1; height >>= 1;
block_w >>= 1; block_h >>= 1;
vp8_mc_chroma(s, dst[1] + by_off * s->uvlinesize + bx_off,
dst[2] + by_off * s->uvlinesize + bx_off, ref_frame->data[1],
ref_frame->data[2], &uvmv, x_off + bx_off, y_off + by_off,
dst[2] + by_off * s->uvlinesize + bx_off, ref_frame,
&uvmv, x_off + bx_off, y_off + by_off,
block_w, block_h, width, height, s->uvlinesize,
s->put_pixels_tab[1 + (block_w == 4)]);
}
@ -1151,6 +1168,9 @@ static av_always_inline void prefetch_motion(VP8Context *s, VP8Macroblock *mb, i
int my = (mb->mv.y>>2) + y_off;
uint8_t **src= s->framep[ref]->data;
int off= mx + (my + (mb_x&3)*4)*s->linesize + 64;
/* For threading, a ff_thread_await_progress here might be useful, but
* it actually slows down the decoder. Since a bad prefetch doesn't
* generate bad decoder output, we don't run it here. */
s->dsp.prefetch(src[0]+off, s->linesize, 4);
off= (mx>>1) + ((my>>1) + (mb_x&7))*s->uvlinesize + 64;
s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
@ -1182,7 +1202,7 @@ void inter_predict(VP8Context *s, uint8_t *dst[3], VP8Macroblock *mb,
for (y = 0; y < 4; y++) {
for (x = 0; x < 4; x++) {
vp8_mc_luma(s, dst[0] + 4*y*s->linesize + x*4,
ref->data[0], &bmv[4*y + x],
ref, &bmv[4*y + x],
4*x + x_off, 4*y + y_off, 4, 4,
width, height, s->linesize,
s->put_pixels_tab[2]);
@ -1208,8 +1228,7 @@ void inter_predict(VP8Context *s, uint8_t *dst[3], VP8Macroblock *mb,
uvmv.y &= ~7;
}
vp8_mc_chroma(s, dst[1] + 4*y*s->uvlinesize + x*4,
dst[2] + 4*y*s->uvlinesize + x*4,
ref->data[1], ref->data[2], &uvmv,
dst[2] + 4*y*s->uvlinesize + x*4, ref, &uvmv,
4*x + x_off, 4*y + y_off, 4, 4,
width, height, s->uvlinesize,
s->put_pixels_tab[2]);
@ -1427,13 +1446,13 @@ static av_always_inline void filter_mb_simple(VP8Context *s, uint8_t *dst, VP8Fi
}
}
static void filter_mb_row(VP8Context *s, int mb_y)
static void filter_mb_row(VP8Context *s, AVFrame *curframe, int mb_y)
{
VP8FilterStrength *f = s->filter_strength;
uint8_t *dst[3] = {
s->framep[VP56_FRAME_CURRENT]->data[0] + 16*mb_y*s->linesize,
s->framep[VP56_FRAME_CURRENT]->data[1] + 8*mb_y*s->uvlinesize,
s->framep[VP56_FRAME_CURRENT]->data[2] + 8*mb_y*s->uvlinesize
curframe->data[0] + 16*mb_y*s->linesize,
curframe->data[1] + 8*mb_y*s->uvlinesize,
curframe->data[2] + 8*mb_y*s->uvlinesize
};
int mb_x;
@ -1446,10 +1465,10 @@ static void filter_mb_row(VP8Context *s, int mb_y)
}
}
static void filter_mb_row_simple(VP8Context *s, int mb_y)
static void filter_mb_row_simple(VP8Context *s, AVFrame *curframe, int mb_y)
{
VP8FilterStrength *f = s->filter_strength;
uint8_t *dst = s->framep[VP56_FRAME_CURRENT]->data[0] + 16*mb_y*s->linesize;
uint8_t *dst = curframe->data[0] + 16*mb_y*s->linesize;
int mb_x;
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
@ -1465,7 +1484,7 @@ static int vp8_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
VP8Context *s = avctx->priv_data;
int ret, mb_x, mb_y, i, y, referenced;
enum AVDiscard skip_thresh;
AVFrame *av_uninit(curframe);
AVFrame *av_uninit(curframe), *prev_frame = s->framep[VP56_FRAME_CURRENT];
if ((ret = decode_frame_header(s, avpkt->data, avpkt->size)) < 0)
return ret;
@ -1482,24 +1501,60 @@ static int vp8_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
}
s->deblock_filter = s->filter.level && avctx->skip_loop_filter < skip_thresh;
for (i = 0; i < 4; i++)
if (&s->frames[i] != s->framep[VP56_FRAME_PREVIOUS] &&
// release no longer referenced frames
for (i = 0; i < 5; i++)
if (s->frames[i].data[0] &&
&s->frames[i] != prev_frame &&
&s->frames[i] != s->framep[VP56_FRAME_PREVIOUS] &&
&s->frames[i] != s->framep[VP56_FRAME_GOLDEN] &&
&s->frames[i] != s->framep[VP56_FRAME_GOLDEN2])
ff_thread_release_buffer(avctx, &s->frames[i]);
// find a free buffer
for (i = 0; i < 5; i++)
if (&s->frames[i] != prev_frame &&
&s->frames[i] != s->framep[VP56_FRAME_PREVIOUS] &&
&s->frames[i] != s->framep[VP56_FRAME_GOLDEN] &&
&s->frames[i] != s->framep[VP56_FRAME_GOLDEN2]) {
curframe = s->framep[VP56_FRAME_CURRENT] = &s->frames[i];
break;
}
if (i == 5) {
av_log(avctx, AV_LOG_FATAL, "Ran out of free frames!\n");
abort();
}
if (curframe->data[0])
avctx->release_buffer(avctx, curframe);
ff_thread_release_buffer(avctx, curframe);
curframe->key_frame = s->keyframe;
curframe->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
curframe->reference = referenced ? 3 : 0;
if ((ret = avctx->get_buffer(avctx, curframe))) {
curframe->ref_index[0] = s->segmentation_map;
if ((ret = ff_thread_get_buffer(avctx, curframe))) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed!\n");
return ret;
}
// check if golden and altref are swapped
if (s->update_altref != VP56_FRAME_NONE) {
s->next_framep[VP56_FRAME_GOLDEN2] = s->framep[s->update_altref];
} else {
s->next_framep[VP56_FRAME_GOLDEN2] = s->framep[VP56_FRAME_GOLDEN2];
}
if (s->update_golden != VP56_FRAME_NONE) {
s->next_framep[VP56_FRAME_GOLDEN] = s->framep[s->update_golden];
} else {
s->next_framep[VP56_FRAME_GOLDEN] = s->framep[VP56_FRAME_GOLDEN];
}
if (s->update_last) {
s->next_framep[VP56_FRAME_PREVIOUS] = curframe;
} else {
s->next_framep[VP56_FRAME_PREVIOUS] = s->framep[VP56_FRAME_PREVIOUS];
}
s->next_framep[VP56_FRAME_CURRENT] = curframe;
ff_thread_finish_setup(avctx);
// Given that arithmetic probabilities are updated every frame, it's quite likely
// that the values we have on a random interframe are complete junk if we didn't
// start decode on a keyframe. So just don't display anything rather than junk.
@ -1530,7 +1585,7 @@ static int vp8_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
if (s->keyframe)
memset(s->intra4x4_pred_mode_top, DC_PRED, s->mb_width*4);
#define MARGIN (16 << 2)
#define MARGIN (16 << 2)
s->mv_min.y = -MARGIN;
s->mv_max.y = ((s->mb_height - 1) << 6) + MARGIN;
@ -1559,13 +1614,16 @@ static int vp8_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
s->mv_min.x = -MARGIN;
s->mv_max.x = ((s->mb_width - 1) << 6) + MARGIN;
if (prev_frame && s->segmentation.enabled && s->segmentation.update_map)
ff_thread_await_progress(prev_frame, mb_y, 0);
for (mb_x = 0; mb_x < s->mb_width; mb_x++, mb_xy++, mb++) {
/* 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, s->segmentation_map + mb_xy);
decode_mb_mode(s, mb, mb_x, mb_y, s->segmentation_map + mb_xy,
prev_frame ? prev_frame->ref_index[0] + mb_xy : NULL);
prefetch_motion(s, mb, mb_x, mb_y, mb_xy, VP56_FRAME_PREVIOUS);
@ -1605,46 +1663,27 @@ static int vp8_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
}
if (s->deblock_filter) {
if (s->filter.simple)
filter_mb_row_simple(s, mb_y);
filter_mb_row_simple(s, curframe, mb_y);
else
filter_mb_row(s, mb_y);
filter_mb_row(s, curframe, mb_y);
}
s->mv_min.y -= 64;
s->mv_max.y -= 64;
ff_thread_report_progress(curframe, mb_y, 0);
}
ff_thread_report_progress(curframe, INT_MAX, 0);
skip_decode:
// if future frames don't use the updated probabilities,
// reset them to the values we saved
if (!s->update_probabilities)
s->prob[0] = s->prob[1];
// check if golden and altref are swapped
if (s->update_altref == VP56_FRAME_GOLDEN &&
s->update_golden == VP56_FRAME_GOLDEN2)
FFSWAP(AVFrame *, s->framep[VP56_FRAME_GOLDEN], s->framep[VP56_FRAME_GOLDEN2]);
else {
if (s->update_altref != VP56_FRAME_NONE)
s->framep[VP56_FRAME_GOLDEN2] = s->framep[s->update_altref];
if (s->update_golden != VP56_FRAME_NONE)
s->framep[VP56_FRAME_GOLDEN] = s->framep[s->update_golden];
}
if (s->update_last) // move cur->prev
s->framep[VP56_FRAME_PREVIOUS] = s->framep[VP56_FRAME_CURRENT];
// release no longer referenced frames
for (i = 0; i < 4; i++)
if (s->frames[i].data[0] &&
&s->frames[i] != s->framep[VP56_FRAME_CURRENT] &&
&s->frames[i] != s->framep[VP56_FRAME_PREVIOUS] &&
&s->frames[i] != s->framep[VP56_FRAME_GOLDEN] &&
&s->frames[i] != s->framep[VP56_FRAME_GOLDEN2])
avctx->release_buffer(avctx, &s->frames[i]);
memcpy(&s->framep[0], &s->next_framep[0], sizeof(s->framep[0]) * 4);
if (!s->invisible) {
*(AVFrame*)data = *s->framep[VP56_FRAME_CURRENT];
*(AVFrame*)data = *curframe;
*data_size = sizeof(AVFrame);
}
@ -1671,6 +1710,36 @@ static av_cold int vp8_decode_free(AVCodecContext *avctx)
return 0;
}
static av_cold int vp8_decode_init_thread_copy(AVCodecContext *avctx)
{
VP8Context *s = avctx->priv_data;
s->avctx = avctx;
return 0;
}
#define REBASE(pic) \
pic ? pic - &s_src->frames[0] + &s->frames[0] : NULL
static int vp8_decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
{
VP8Context *s = dst->priv_data, *s_src = src->priv_data;
s->prob[0] = s_src->prob[!s_src->update_probabilities];
s->segmentation = s_src->segmentation;
s->lf_delta = s_src->lf_delta;
memcpy(s->sign_bias, s_src->sign_bias, sizeof(s->sign_bias));
memcpy(&s->frames, &s_src->frames, sizeof(s->frames));
s->framep[0] = REBASE(s_src->next_framep[0]);
s->framep[1] = REBASE(s_src->next_framep[1]);
s->framep[2] = REBASE(s_src->next_framep[2]);
s->framep[3] = REBASE(s_src->next_framep[3]);
return 0;
}
AVCodec ff_vp8_decoder = {
"vp8",
AVMEDIA_TYPE_VIDEO,
@ -1680,7 +1749,9 @@ AVCodec ff_vp8_decoder = {
NULL,
vp8_decode_free,
vp8_decode_frame,
CODEC_CAP_DR1,
CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
.flush = vp8_decode_flush,
.long_name = NULL_IF_CONFIG_SMALL("On2 VP8"),
.init_thread_copy = ONLY_IF_THREADS_ENABLED(vp8_decode_init_thread_copy),
.update_thread_context = ONLY_IF_THREADS_ENABLED(vp8_decode_update_thread_context),
};

3
libavcodec/vp8.h
View File

@ -86,6 +86,7 @@ typedef struct {
typedef struct {
AVCodecContext *avctx;
AVFrame *framep[4];
AVFrame *next_framep[4];
uint8_t *edge_emu_buffer;
uint16_t mb_width; /* number of horizontal MB */
@ -235,7 +236,7 @@ typedef struct {
VP8DSPContext vp8dsp;
H264PredContext hpc;
vp8_mc_func put_pixels_tab[3][3][3];
AVFrame frames[4];
AVFrame frames[5];
} VP8Context;
#endif