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proresenc: multithreaded quantiser search

tags/n0.11
Kostya Shishkov 13 years ago
parent
8099fc763b
commit
83632cbb11
1 changed files with 101 additions and 60 deletions
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  1. +101
    -60
      libavcodec/proresenc.c

+ 101
- 60
libavcodec/proresenc.c View File

@@ -166,6 +166,13 @@ struct TrellisNode {

#define MAX_STORED_Q 16

typedef struct ProresThreadData {
DECLARE_ALIGNED(16, DCTELEM, blocks)[MAX_PLANES][64 * 4 * MAX_MBS_PER_SLICE];
DECLARE_ALIGNED(16, uint16_t, emu_buf)[16 * 16];
int16_t custom_q[64];
struct TrellisNode *nodes;
} ProresThreadData;

typedef struct ProresContext {
AVClass *class;
DECLARE_ALIGNED(16, DCTELEM, blocks)[MAX_PLANES][64 * 4 * MAX_MBS_PER_SLICE];
@@ -194,13 +201,14 @@ typedef struct ProresContext {
int profile;
const struct prores_profile *profile_info;

struct TrellisNode *nodes;
int *slice_q;

ProresThreadData *tdata;
} ProresContext;

static void get_slice_data(ProresContext *ctx, const uint16_t *src,
int linesize, int x, int y, int w, int h,
DCTELEM *blocks,
DCTELEM *blocks, uint16_t *emu_buf,
int mbs_per_slice, int blocks_per_mb, int is_chroma)
{
const uint16_t *esrc;
@@ -220,24 +228,24 @@ static void get_slice_data(ProresContext *ctx, const uint16_t *src,
} else {
int bw, bh, pix;

esrc = ctx->emu_buf;
elinesize = 16 * sizeof(*ctx->emu_buf);
esrc = emu_buf;
elinesize = 16 * sizeof(*emu_buf);

bw = FFMIN(w - x, mb_width);
bh = FFMIN(h - y, 16);

for (j = 0; j < bh; j++) {
memcpy(ctx->emu_buf + j * 16,
memcpy(emu_buf + j * 16,
(const uint8_t*)src + j * linesize,
bw * sizeof(*src));
pix = ctx->emu_buf[j * 16 + bw - 1];
pix = emu_buf[j * 16 + bw - 1];
for (k = bw; k < mb_width; k++)
ctx->emu_buf[j * 16 + k] = pix;
emu_buf[j * 16 + k] = pix;
}
for (; j < 16; j++)
memcpy(ctx->emu_buf + j * 16,
ctx->emu_buf + (bh - 1) * 16,
mb_width * sizeof(*ctx->emu_buf));
memcpy(emu_buf + j * 16,
emu_buf + (bh - 1) * 16,
mb_width * sizeof(*emu_buf));
}
if (!is_chroma) {
ctx->dsp.fdct(esrc, elinesize, blocks);
@@ -427,7 +435,7 @@ static int encode_slice(AVCodecContext *avctx, const AVFrame *pic,
src = (const uint16_t*)(pic->data[i] + yp * pic->linesize[i]) + xp;

get_slice_data(ctx, src, pic->linesize[i], xp, yp,
pwidth, avctx->height, ctx->blocks[0],
pwidth, avctx->height, ctx->blocks[0], ctx->emu_buf,
mbs_per_slice, num_cblocks, is_chroma);
sizes[i] = encode_slice_plane(ctx, pb, src, pic->linesize[i],
mbs_per_slice, ctx->blocks[0],
@@ -531,22 +539,23 @@ static int estimate_slice_plane(ProresContext *ctx, int *error, int plane,
const uint16_t *src, int linesize,
int mbs_per_slice,
int blocks_per_mb, int plane_size_factor,
const int16_t *qmat)
const int16_t *qmat, ProresThreadData *td)
{
int blocks_per_slice;
int bits;

blocks_per_slice = mbs_per_slice * blocks_per_mb;

bits = estimate_dcs(error, ctx->blocks[plane], blocks_per_slice, qmat[0]);
bits += estimate_acs(error, ctx->blocks[plane], blocks_per_slice,
bits = estimate_dcs(error, td->blocks[plane], blocks_per_slice, qmat[0]);
bits += estimate_acs(error, td->blocks[plane], blocks_per_slice,
plane_size_factor, ctx->scantable.permutated, qmat);

return FFALIGN(bits, 8);
}

static int find_slice_quant(AVCodecContext *avctx, const AVFrame *pic,
int trellis_node, int x, int y, int mbs_per_slice)
int trellis_node, int x, int y, int mbs_per_slice,
ProresThreadData *td)
{
ProresContext *ctx = avctx->priv_data;
int i, q, pq, xp, yp;
@@ -583,13 +592,13 @@ static int find_slice_quant(AVCodecContext *avctx, const AVFrame *pic,
src = (const uint16_t*)(pic->data[i] + yp * pic->linesize[i]) + xp;

get_slice_data(ctx, src, pic->linesize[i], xp, yp,
pwidth, avctx->height, ctx->blocks[i],
pwidth, avctx->height, td->blocks[i], td->emu_buf,
mbs_per_slice, num_cblocks[i], is_chroma[i]);
}

for (q = min_quant; q < max_quant + 2; q++) {
ctx->nodes[trellis_node + q].prev_node = -1;
ctx->nodes[trellis_node + q].quant = q;
td->nodes[trellis_node + q].prev_node = -1;
td->nodes[trellis_node + q].quant = q;
}

// todo: maybe perform coarser quantising to fit into frame size when needed
@@ -601,7 +610,7 @@ static int find_slice_quant(AVCodecContext *avctx, const AVFrame *pic,
src, pic->linesize[i],
mbs_per_slice,
num_cblocks[i], plane_factor[i],
ctx->quants[q]);
ctx->quants[q], td);
}
if (bits > 65000 * 8) {
error = SCORE_LIMIT;
@@ -621,7 +630,7 @@ static int find_slice_quant(AVCodecContext *avctx, const AVFrame *pic,
if (q < MAX_STORED_Q) {
qmat = ctx->quants[q];
} else {
qmat = ctx->custom_q;
qmat = td->custom_q;
for (i = 0; i < 64; i++)
qmat[i] = ctx->quant_mat[i] * q;
}
@@ -630,7 +639,7 @@ static int find_slice_quant(AVCodecContext *avctx, const AVFrame *pic,
src, pic->linesize[i],
mbs_per_slice,
num_cblocks[i], plane_factor[i],
qmat);
qmat, td);
}
if (bits <= ctx->bits_per_mb * mbs_per_slice)
break;
@@ -640,7 +649,7 @@ static int find_slice_quant(AVCodecContext *avctx, const AVFrame *pic,
slice_score[max_quant + 1] = error;
overquant = q;
}
ctx->nodes[trellis_node + max_quant + 1].quant = overquant;
td->nodes[trellis_node + max_quant + 1].quant = overquant;

bits_limit = mbs * ctx->bits_per_mb;
for (pq = min_quant; pq < max_quant + 2; pq++) {
@@ -649,30 +658,30 @@ static int find_slice_quant(AVCodecContext *avctx, const AVFrame *pic,
for (q = min_quant; q < max_quant + 2; q++) {
cur = trellis_node + q;

bits = ctx->nodes[prev].bits + slice_bits[q];
bits = td->nodes[prev].bits + slice_bits[q];
error = slice_score[q];
if (bits > bits_limit)
error = SCORE_LIMIT;

if (ctx->nodes[prev].score < SCORE_LIMIT && error < SCORE_LIMIT)
new_score = ctx->nodes[prev].score + error;
if (td->nodes[prev].score < SCORE_LIMIT && error < SCORE_LIMIT)
new_score = td->nodes[prev].score + error;
else
new_score = SCORE_LIMIT;
if (ctx->nodes[cur].prev_node == -1 ||
ctx->nodes[cur].score >= new_score) {
if (td->nodes[cur].prev_node == -1 ||
td->nodes[cur].score >= new_score) {

ctx->nodes[cur].bits = bits;
ctx->nodes[cur].score = new_score;
ctx->nodes[cur].prev_node = prev;
td->nodes[cur].bits = bits;
td->nodes[cur].score = new_score;
td->nodes[cur].prev_node = prev;
}
}
}

error = ctx->nodes[trellis_node + min_quant].score;
error = td->nodes[trellis_node + min_quant].score;
pq = trellis_node + min_quant;
for (q = min_quant + 1; q < max_quant + 2; q++) {
if (ctx->nodes[trellis_node + q].score <= error) {
error = ctx->nodes[trellis_node + q].score;
if (td->nodes[trellis_node + q].score <= error) {
error = td->nodes[trellis_node + q].score;
pq = trellis_node + q;
}
}
@@ -680,6 +689,30 @@ static int find_slice_quant(AVCodecContext *avctx, const AVFrame *pic,
return pq;
}

static int find_quant_thread(AVCodecContext *avctx, void *arg,
int jobnr, int threadnr)
{
ProresContext *ctx = avctx->priv_data;
ProresThreadData *td = ctx->tdata + threadnr;
int mbs_per_slice = ctx->mbs_per_slice;
int x, y = jobnr, mb, q = 0;

for (x = mb = 0; x < ctx->mb_width; x += mbs_per_slice, mb++) {
while (ctx->mb_width - x < mbs_per_slice)
mbs_per_slice >>= 1;
q = find_slice_quant(avctx, avctx->coded_frame,
(mb + 1) * TRELLIS_WIDTH, x, y,
mbs_per_slice, td);
}

for (x = ctx->slices_width - 1; x >= 0; x--) {
ctx->slice_q[x + y * ctx->slices_width] = td->nodes[q].quant;
q = td->nodes[q].prev_node;
}

return 0;
}

static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *pic, int *got_packet)
{
@@ -751,25 +784,18 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
buf += ctx->num_slices * 2;

// slices
for (y = 0; y < ctx->mb_height; y++) {
mbs_per_slice = ctx->mbs_per_slice;
if (!ctx->force_quant) {
for (x = mb = 0; x < ctx->mb_width; x += mbs_per_slice, mb++) {
while (ctx->mb_width - x < mbs_per_slice)
mbs_per_slice >>= 1;
q = find_slice_quant(avctx, pic, (mb + 1) * TRELLIS_WIDTH, x, y,
mbs_per_slice);
}

for (x = ctx->slices_width - 1; x >= 0; x--) {
ctx->slice_q[x] = ctx->nodes[q].quant;
q = ctx->nodes[q].prev_node;
}
}
if (!ctx->force_quant) {
ret = avctx->execute2(avctx, find_quant_thread, NULL, NULL,
ctx->mb_height);
if (ret)
return ret;
}

for (y = 0; y < ctx->mb_height; y++) {
mbs_per_slice = ctx->mbs_per_slice;
for (x = mb = 0; x < ctx->mb_width; x += mbs_per_slice, mb++) {
q = ctx->force_quant ? ctx->force_quant : ctx->slice_q[mb];
q = ctx->force_quant ? ctx->force_quant
: ctx->slice_q[mb + y * ctx->slices_width];

while (ctx->mb_width - x < mbs_per_slice)
mbs_per_slice >>= 1;
@@ -807,13 +833,18 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
static av_cold int encode_close(AVCodecContext *avctx)
{
ProresContext *ctx = avctx->priv_data;
int i;

if (avctx->coded_frame->data[0])
avctx->release_buffer(avctx, avctx->coded_frame);

av_freep(&avctx->coded_frame);

av_freep(&ctx->nodes);
if (ctx->tdata) {
for (i = 0; i < avctx->thread_count; i++)
av_free(ctx->tdata[i].nodes);
}
av_freep(&ctx->tdata);
av_freep(&ctx->slice_q);

return 0;
@@ -883,23 +914,32 @@ static av_cold int encode_init(AVCodecContext *avctx)
ctx->quants[i][j] = ctx->quant_mat[j] * i;
}

ctx->nodes = av_malloc((ctx->slices_width + 1) * TRELLIS_WIDTH
* sizeof(*ctx->nodes));
if (!ctx->nodes) {
ctx->slice_q = av_malloc(ctx->num_slices * sizeof(*ctx->slice_q));
if (!ctx->slice_q) {
encode_close(avctx);
return AVERROR(ENOMEM);
}
for (i = min_quant; i < max_quant + 2; i++) {
ctx->nodes[i].prev_node = -1;
ctx->nodes[i].bits = 0;
ctx->nodes[i].score = 0;
}

ctx->slice_q = av_malloc(ctx->slices_width * sizeof(*ctx->slice_q));
if (!ctx->slice_q) {
ctx->tdata = av_mallocz(avctx->thread_count * sizeof(*ctx->tdata));
if (!ctx->tdata) {
encode_close(avctx);
return AVERROR(ENOMEM);
}

for (j = 0; j < avctx->thread_count; j++) {
ctx->tdata[j].nodes = av_malloc((ctx->slices_width + 1)
* TRELLIS_WIDTH
* sizeof(*ctx->tdata->nodes));
if (!ctx->tdata[j].nodes) {
encode_close(avctx);
return AVERROR(ENOMEM);
}
for (i = min_quant; i < max_quant + 2; i++) {
ctx->tdata[j].nodes[i].prev_node = -1;
ctx->tdata[j].nodes[i].bits = 0;
ctx->tdata[j].nodes[i].score = 0;
}
}
} else {
int ls = 0;

@@ -987,6 +1027,7 @@ AVCodec ff_prores_encoder = {
.init = encode_init,
.close = encode_close,
.encode2 = encode_frame,
.capabilities = CODEC_CAP_SLICE_THREADS,
.long_name = NULL_IF_CONFIG_SMALL("Apple ProRes (iCodec Pro)"),
.pix_fmts = (const enum PixelFormat[]) {
PIX_FMT_YUV422P10, PIX_FMT_YUV444P10, PIX_FMT_NONE


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