generic-library/ffmpeg
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hevc: fix decoding of one PU wide files

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For those the block size may be larger than the source linesize (if the
edges are not allocated).

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Guillaume Martres 2014-01-03 09:10:38 +01:00 committed by Anton Khirnov
parent a246af86e4
commit e588615d93
2 changed files with 22 additions and 17 deletions
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33
libavcodec/hevc.c
View File

@ -1497,15 +1497,19 @@ static void luma_mc(HEVCContext *s, int16_t *dst, ptrdiff_t dststride,
if (x_off < extra_left || y_off < extra_top ||
x_off >= pic_width - block_w - ff_hevc_qpel_extra_after[mx] ||
y_off >= pic_height - block_h - ff_hevc_qpel_extra_after[my]) {
const int edge_emu_stride = EDGE_EMU_BUFFER_STRIDE << s->sps->pixel_shift;
int offset = extra_top * srcstride + (extra_left << s->sps->pixel_shift);
int buf_offset = extra_top *
edge_emu_stride + (extra_left << s->sps->pixel_shift);
s->vdsp.emulated_edge_mc(lc->edge_emu_buffer, src - offset,
srcstride, srcstride,
edge_emu_stride, srcstride,
block_w + ff_hevc_qpel_extra[mx],
block_h + ff_hevc_qpel_extra[my],
x_off - extra_left, y_off - extra_top,
pic_width, pic_height);
src = lc->edge_emu_buffer + offset;
src = lc->edge_emu_buffer + buf_offset;
srcstride = edge_emu_stride;
}
s->hevcdsp.put_hevc_qpel[my][mx](dst, dststride, src, srcstride, block_w,
block_h, lc->mc_buffer);
@ -1548,27 +1552,35 @@ static void chroma_mc(HEVCContext *s, int16_t *dst1, int16_t *dst2,
if (x_off < EPEL_EXTRA_BEFORE || y_off < EPEL_EXTRA_AFTER ||
x_off >= pic_width - block_w - EPEL_EXTRA_AFTER ||
y_off >= pic_height - block_h - EPEL_EXTRA_AFTER) {
const int edge_emu_stride = EDGE_EMU_BUFFER_STRIDE << s->sps->pixel_shift;
int offset1 = EPEL_EXTRA_BEFORE * (src1stride + (1 << s->sps->pixel_shift));
int buf_offset1 = EPEL_EXTRA_BEFORE *
(edge_emu_stride + (1 << s->sps->pixel_shift));
int offset2 = EPEL_EXTRA_BEFORE * (src2stride + (1 << s->sps->pixel_shift));
int buf_offset2 = EPEL_EXTRA_BEFORE *
(edge_emu_stride + (1 << s->sps->pixel_shift));
s->vdsp.emulated_edge_mc(lc->edge_emu_buffer, src1 - offset1,
src1stride, src1stride,
edge_emu_stride, src1stride,
block_w + EPEL_EXTRA, block_h + EPEL_EXTRA,
x_off - EPEL_EXTRA_BEFORE,
y_off - EPEL_EXTRA_BEFORE,
pic_width, pic_height);
src1 = lc->edge_emu_buffer + offset1;
src1 = lc->edge_emu_buffer + buf_offset1;
src1stride = edge_emu_stride;
s->hevcdsp.put_hevc_epel[!!my][!!mx](dst1, dststride, src1, src1stride,
block_w, block_h, mx, my, lc->mc_buffer);
s->vdsp.emulated_edge_mc(lc->edge_emu_buffer, src2 - offset2,
src2stride, src2stride,
edge_emu_stride, src2stride,
block_w + EPEL_EXTRA, block_h + EPEL_EXTRA,
x_off - EPEL_EXTRA_BEFORE,
y_off - EPEL_EXTRA_BEFORE,
pic_width, pic_height);
src2 = lc->edge_emu_buffer + offset2;
src2 = lc->edge_emu_buffer + buf_offset2;
src2stride = edge_emu_stride;
s->hevcdsp.put_hevc_epel[!!my][!!mx](dst2, dststride, src2, src2stride,
block_w, block_h, mx, my,
lc->mc_buffer);
@ -2421,13 +2433,6 @@ static int hevc_frame_start(HEVCContext *s)
if (ret < 0)
goto fail;
av_fast_malloc(&lc->edge_emu_buffer, &lc->edge_emu_buffer_size,
(MAX_PB_SIZE + 7) * s->ref->frame->linesize[0]);
if (!lc->edge_emu_buffer) {
ret = AVERROR(ENOMEM);
goto fail;
}
ret = ff_hevc_frame_rps(s);
if (ret < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Error constructing the frame RPS.\n");
@ -2924,12 +2929,10 @@ fail:
static av_cold int hevc_decode_free(AVCodecContext *avctx)
{
HEVCContext *s = avctx->priv_data;
HEVCLocalContext *lc = &s->HEVClc;
int i;
pic_arrays_free(s);
av_freep(&lc->edge_emu_buffer);
av_freep(&s->md5_ctx);
av_frame_free(&s->tmp_frame);

6
libavcodec/hevc.h
View File

@ -71,6 +71,8 @@
#define EPEL_EXTRA_AFTER 2
#define EPEL_EXTRA 3
#define EDGE_EMU_BUFFER_STRIDE 80
/**
* Value of the luma sample at position (x, y) in the 2D array tab.
*/
@ -741,8 +743,8 @@ typedef struct HEVCLocalContext {
int start_of_tiles_x;
int end_of_tiles_x;
int end_of_tiles_y;
uint8_t *edge_emu_buffer;
int edge_emu_buffer_size;
/* +7 is for subpixel interpolation, *2 for high bit depths */
DECLARE_ALIGNED(32, uint8_t, edge_emu_buffer)[(MAX_PB_SIZE + 7) * EDGE_EMU_BUFFER_STRIDE * 2];
CodingTree ct;
CodingUnit cu;
PredictionUnit pu;