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Do MC and IDCT in coding (hilbert) order

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This increases the slice size to 64 pixels, due to having to decode an
entire chroma superblock row per slice.

This can be up to 6% slower depending on clip and CPU, but is necessary
for future optimizations that gain significantly more than was lost.

Originally committed as revision 22189 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad 2010-03-03 23:27:40 +00:00
parent 35c28d23cb
commit 7a095ea6fb
1 changed files with 43 additions and 26 deletions
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69
libavcodec/vp3.c
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@ -122,6 +122,13 @@ static const int ModeAlphabet[6][CODING_MODE_COUNT] =
};
static const uint8_t hilbert_offset[16][2] = {
{0,0}, {1,0}, {1,1}, {0,1},
{0,2}, {0,3}, {1,3}, {1,2},
{2,2}, {2,3}, {3,3}, {3,2},
{3,1}, {2,1}, {2,0}, {3,0}
};
#define MIN_DEQUANT_VAL 2
typedef struct Vp3DecodeContext {
@ -1369,19 +1376,19 @@ static void vp3_draw_horiz_band(Vp3DecodeContext *s, int y)
/*
* Perform the final rendering for a particular slice of data.
* The slice number ranges from 0..(macroblock_height - 1).
* The slice number ranges from 0..(c_superblock_height - 1).
*/
static void render_slice(Vp3DecodeContext *s, int slice)
{
int x;
int x, y, i, j;
int16_t *dequantizer;
LOCAL_ALIGNED_16(DCTELEM, block, [64]);
int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
int motion_halfpel_index;
uint8_t *motion_source;
int plane;
int plane, first_pixel;
if (slice >= s->macroblock_height)
if (slice >= s->c_superblock_height)
return;
for (plane = 0; plane < 3; plane++) {
@ -1391,9 +1398,14 @@ static void render_slice(Vp3DecodeContext *s, int slice)
int stride = s->current_frame.linesize[plane];
int plane_width = s->width >> !!plane;
int plane_height = s->height >> !!plane;
int y = slice * FRAGMENT_PIXELS << !plane ;
int slice_height = y + (FRAGMENT_PIXELS << !plane);
int i = s->fragment_start[plane] + (y>>3)*(s->fragment_width>>!!plane);
int sb_x, sb_y = slice << !plane;
int slice_height = sb_y + (plane ? 1 : 2);
int slice_width = plane ? s->c_superblock_width : s->y_superblock_width;
int fragment_width = s->fragment_width >> !!plane;
int fragment_height = s->fragment_height >> !!plane;
int fragment_start = s->fragment_start[plane];
if (!s->flipped_image) stride = -stride;
if (CONFIG_GRAY && plane && (s->avctx->flags & CODEC_FLAG_GRAY))
@ -1403,17 +1415,24 @@ static void render_slice(Vp3DecodeContext *s, int slice)
if(FFABS(stride) > 2048)
return; //various tables are fixed size
/* for each fragment row in the slice (both of them)... */
for (; y < slice_height; y += 8) {
/* for each superblock row in the slice (both of them)... */
for (; sb_y < slice_height; sb_y++) {
/* for each fragment in a row... */
for (x = 0; x < plane_width; x += 8, i++) {
int first_pixel = y*stride + x;
/* for each superblock in a row... */
for (sb_x = 0; sb_x < slice_width; sb_x++) {
if ((i < 0) || (i >= s->fragment_count)) {
av_log(s->avctx, AV_LOG_ERROR, " vp3:render_slice(): bad fragment number (%d)\n", i);
return;
}
/* for each block in a superblock... */
for (j = 0; j < 16; j++) {
x = 4*sb_x + hilbert_offset[j][0];
y = 4*sb_y + hilbert_offset[j][1];
i = fragment_start + y*fragment_width + x;
// bounds check
if (x >= fragment_width || y >= fragment_height)
continue;
first_pixel = 8*y*stride + 8*x;
/* transform if this block was coded */
if (s->all_fragments[i].coding_method != MODE_COPY) {
@ -1439,8 +1458,8 @@ static void render_slice(Vp3DecodeContext *s, int slice)
motion_y= (motion_y>>1) | (motion_y&1);
}
src_x= (motion_x>>1) + x;
src_y= (motion_y>>1) + y;
src_x= (motion_x>>1) + 8*x;
src_y= (motion_y>>1) + 8*y;
if ((motion_x == 127) || (motion_y == 127))
av_log(s->avctx, AV_LOG_ERROR, " help! got invalid motion vector! (%X, %X)\n", motion_x, motion_y);
@ -1526,11 +1545,11 @@ static void render_slice(Vp3DecodeContext *s, int slice)
stride, 8);
}
}
}
// Filter the previous block row. We can't filter the current row yet
// since it needs pixels from the next row
if (y > 0)
apply_loop_filter(s, plane, (y>>3)-1, (y>>3));
// Filter up to the last row in the superblock row
apply_loop_filter(s, plane, 4*sb_y - !!sb_y, FFMIN(4*sb_y+3, fragment_height-1));
}
}
@ -1542,9 +1561,7 @@ static void render_slice(Vp3DecodeContext *s, int slice)
* dispatch (slice - 1);
*/
// now that we've filtered the last rows, they're safe to display
if (slice)
vp3_draw_horiz_band(s, 16*slice);
vp3_draw_horiz_band(s, 64*slice + 64-16);
}
/*
@ -1875,7 +1892,7 @@ static int vp3_decode_frame(AVCodecContext *avctx,
}
s->last_slice_end = 0;
for (i = 0; i < s->macroblock_height; i++)
for (i = 0; i < s->c_superblock_height; i++)
render_slice(s, i);
// filter the last row