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mimic: implement multithreading.

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This commit is contained in:
Alexander Strange 2011-03-28 21:44:38 -07:00 committed by Ronald S. Bultje
parent 31f00274f8
commit a75529e81e
1 changed files with 49 additions and 11 deletions
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58
libavcodec/mimic.c
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@ -27,6 +27,7 @@
#include "get_bits.h"
#include "bytestream.h"
#include "dsputil.h"
#include "thread.h"
#define MIMIC_HEADER_SIZE 20
@ -51,6 +52,10 @@ typedef struct {
ScanTable scantable;
DSPContext dsp;
VLC vlc;
/* Kept in the context so multithreading can have a constant to read from */
int next_cur_index;
int next_prev_index;
} MimicContext;
static const uint32_t huffcodes[] = {
@ -121,6 +126,23 @@ static av_cold int mimic_decode_init(AVCodecContext *avctx)
return 0;
}
static int mimic_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
{
MimicContext *dst = avctx->priv_data, *src = avctx_from->priv_data;
if (avctx == avctx_from) return 0;
dst->cur_index = src->next_cur_index;
dst->prev_index = src->next_prev_index;
memcpy(dst->buf_ptrs, src->buf_ptrs, sizeof(src->buf_ptrs));
memcpy(dst->flipped_ptrs, src->flipped_ptrs, sizeof(src->flipped_ptrs));
memset(&dst->buf_ptrs[dst->cur_index], 0, sizeof(AVFrame));
return 0;
}
static const int8_t vlcdec_lookup[9][64] = {
{ 0, },
{ -1, 1, },
@ -205,7 +227,7 @@ static int vlc_decode_block(MimicContext *ctx, int num_coeffs, int qscale)
static int decode(MimicContext *ctx, int quality, int num_coeffs,
int is_iframe)
{
int y, x, plane;
int y, x, plane, cur_row = 0;
for(plane = 0; plane < 3; plane++) {
const int is_chroma = !!plane;
@ -236,6 +258,7 @@ static int decode(MimicContext *ctx, int quality, int num_coeffs,
int index = (ctx->cur_index+backref)&15;
uint8_t *p = ctx->flipped_ptrs[index].data[0];
ff_thread_await_progress(&ctx->buf_ptrs[index], cur_row, 0);
if(p) {
p += src -
ctx->flipped_ptrs[ctx->prev_index].data[plane];
@ -246,6 +269,7 @@ static int decode(MimicContext *ctx, int quality, int num_coeffs,
}
}
} else {
ff_thread_await_progress(&ctx->buf_ptrs[ctx->prev_index], cur_row, 0);
ctx->dsp.put_pixels_tab[1][0](dst, src, stride, 8);
}
src += 8;
@ -253,6 +277,8 @@ static int decode(MimicContext *ctx, int quality, int num_coeffs,
}
src += (stride - ctx->num_hblocks[plane])<<3;
dst += (stride - ctx->num_hblocks[plane])<<3;
ff_thread_report_progress(&ctx->buf_ptrs[ctx->cur_index], cur_row++, 0);
}
}
@ -326,14 +352,20 @@ static int mimic_decode_frame(AVCodecContext *avctx, void *data,
}
ctx->buf_ptrs[ctx->cur_index].reference = 1;
if(avctx->get_buffer(avctx, &ctx->buf_ptrs[ctx->cur_index])) {
ctx->buf_ptrs[ctx->cur_index].pict_type = is_pframe ? FF_P_TYPE:FF_I_TYPE;
if(ff_thread_get_buffer(avctx, &ctx->buf_ptrs[ctx->cur_index])) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
ctx->next_prev_index = ctx->cur_index;
ctx->next_cur_index = (ctx->cur_index - 1) & 15;
prepare_avpic(ctx, &ctx->flipped_ptrs[ctx->cur_index],
(AVPicture*) &ctx->buf_ptrs[ctx->cur_index]);
ff_thread_finish_setup(avctx);
av_fast_malloc(&ctx->swap_buf, &ctx->swap_buf_size,
swap_buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
if(!ctx->swap_buf)
@ -345,21 +377,23 @@ static int mimic_decode_frame(AVCodecContext *avctx, void *data,
init_get_bits(&ctx->gb, ctx->swap_buf, swap_buf_size << 3);
if(!decode(ctx, quality, num_coeffs, !is_pframe)) {
avctx->release_buffer(avctx, &ctx->buf_ptrs[ctx->cur_index]);
if (avctx->active_thread_type&FF_THREAD_FRAME)
ff_thread_report_progress(&ctx->buf_ptrs[ctx->cur_index], INT_MAX, 0);
else {
ff_thread_release_buffer(avctx, &ctx->buf_ptrs[ctx->cur_index]);
return -1;
}
}
ctx->buf_ptrs[ctx->cur_index].pict_type = is_pframe ? FF_P_TYPE:FF_I_TYPE;
*(AVFrame*)data = ctx->buf_ptrs[ctx->cur_index];
*data_size = sizeof(AVFrame);
ctx->prev_index = ctx->cur_index;
ctx->cur_index--;
ctx->cur_index &= 15;
ctx->prev_index = ctx->next_prev_index;
ctx->cur_index = ctx->next_cur_index;
/* Only release frames that aren't used for backreferences anymore */
if(ctx->buf_ptrs[ctx->cur_index].data[0])
avctx->release_buffer(avctx, &ctx->buf_ptrs[ctx->cur_index]);
ff_thread_release_buffer(avctx, &ctx->buf_ptrs[ctx->cur_index]);
return buf_size;
}
@ -370,9 +404,12 @@ static av_cold int mimic_decode_end(AVCodecContext *avctx)
int i;
av_free(ctx->swap_buf);
if(avctx->is_copy) return 0;
for(i = 0; i < 16; i++)
if(ctx->buf_ptrs[i].data[0])
avctx->release_buffer(avctx, &ctx->buf_ptrs[i]);
ff_thread_release_buffer(avctx, &ctx->buf_ptrs[i]);
free_vlc(&ctx->vlc);
return 0;
@ -387,6 +424,7 @@ AVCodec ff_mimic_decoder = {
NULL,
mimic_decode_end,
mimic_decode_frame,
CODEC_CAP_DR1,
CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
.long_name = NULL_IF_CONFIG_SMALL("Mimic"),
.update_thread_context = ONLY_IF_THREADS_ENABLED(mimic_decode_update_thread_context)
};