mirror of https://git.ffmpeg.org/ffmpeg.git
Eliminate superblock <-> macroblock mapping array
Originally committed as revision 21800 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad
parent
25608328af
commit
19cd517dbf
|
|
@ -206,12 +206,6 @@ typedef struct Vp3DecodeContext {
|
|||
* index. */
|
||||
int *superblock_fragments;
|
||||
|
||||
/* This table contains superblock_count * 4 entries. Each set of 4
|
||||
* numbers corresponds to the macroblock indexes 0..3 of the superblock.
|
||||
* An entry will be -1 to indicate that no entry corresponds to that
|
||||
* index. */
|
||||
int *superblock_macroblocks;
|
||||
|
||||
/* This table contains macroblock_count * 6 entries. Each set of 6
|
||||
* numbers corresponds to the fragment indexes 0..5 which comprise
|
||||
* the macroblock (4 Y fragments and 2 C fragments). */
|
||||
|
|
@ -280,14 +274,6 @@ static int init_block_mapping(Vp3DecodeContext *s)
|
|||
-1, 0, -1, 0
|
||||
};
|
||||
|
||||
static const signed char travel_width_mb[4] = {
|
||||
1, 0, 1, 0
|
||||
};
|
||||
|
||||
static const signed char travel_height_mb[4] = {
|
||||
0, 1, 0, -1
|
||||
};
|
||||
|
||||
hilbert_walk_mb[0] = 1;
|
||||
hilbert_walk_mb[1] = s->macroblock_width;
|
||||
hilbert_walk_mb[2] = 1;
|
||||
|
|
@ -364,45 +350,6 @@ static int init_block_mapping(Vp3DecodeContext *s)
|
|||
}
|
||||
}
|
||||
|
||||
/* initialize the superblock <-> macroblock mapping; iterate through
|
||||
* all of the Y plane superblocks to build this mapping */
|
||||
right_edge = s->macroblock_width;
|
||||
bottom_edge = s->macroblock_height;
|
||||
current_width = -1;
|
||||
current_height = 0;
|
||||
superblock_row_inc = s->macroblock_width -
|
||||
(s->y_superblock_width * 2 - s->macroblock_width);
|
||||
mapping_index = 0;
|
||||
current_macroblock = -1;
|
||||
for (i = 0; i < s->u_superblock_start; i++) {
|
||||
|
||||
if (current_width >= right_edge - 1) {
|
||||
/* reset width and move to next superblock row */
|
||||
current_width = -1;
|
||||
current_height += 2;
|
||||
|
||||
/* macroblock is now at the start of a new superblock row */
|
||||
current_macroblock += superblock_row_inc;
|
||||
}
|
||||
|
||||
/* iterate through each potential macroblock in the superblock */
|
||||
for (j = 0; j < 4; j++) {
|
||||
current_macroblock += hilbert_walk_mb[j];
|
||||
current_width += travel_width_mb[j];
|
||||
current_height += travel_height_mb[j];
|
||||
|
||||
/* check if the macroblock is in bounds */
|
||||
if ((current_width < right_edge) &&
|
||||
(current_height < bottom_edge)) {
|
||||
s->superblock_macroblocks[mapping_index] = current_macroblock;
|
||||
} else {
|
||||
s->superblock_macroblocks[mapping_index] = -1;
|
||||
}
|
||||
|
||||
mapping_index++;
|
||||
}
|
||||
}
|
||||
|
||||
/* initialize the macroblock <-> fragment mapping */
|
||||
current_fragment = 0;
|
||||
current_macroblock = 0;
|
||||
|
|
@ -757,7 +704,7 @@ static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
|
|||
*/
|
||||
static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
|
||||
{
|
||||
int i, j, k;
|
||||
int i, j, k, sb_x, sb_y;
|
||||
int scheme;
|
||||
int current_macroblock;
|
||||
int current_fragment;
|
||||
|
|
@ -783,18 +730,17 @@ static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
|
|||
|
||||
/* iterate through all of the macroblocks that contain 1 or more
|
||||
* coded fragments */
|
||||
for (i = 0; i < s->u_superblock_start; i++) {
|
||||
for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
|
||||
for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
|
||||
|
||||
for (j = 0; j < 4; j++) {
|
||||
current_macroblock = s->superblock_macroblocks[i * 4 + j];
|
||||
if ((current_macroblock == -1) ||
|
||||
int mb_x = 2*sb_x + (j>>1);
|
||||
int mb_y = 2*sb_y + (((j>>1)+j)&1);
|
||||
current_macroblock = mb_y * s->macroblock_width + mb_x;
|
||||
|
||||
if (mb_x >= s->macroblock_width || mb_y >= s->macroblock_height ||
|
||||
(s->macroblock_coding[current_macroblock] == MODE_COPY))
|
||||
continue;
|
||||
if (current_macroblock >= s->macroblock_count) {
|
||||
av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_modes(): bad macroblock number (%d >= %d)\n",
|
||||
current_macroblock, s->macroblock_count);
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* mode 7 means get 3 bits for each coding mode */
|
||||
if (scheme == 7)
|
||||
|
|
@ -823,6 +769,7 @@ static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
|
|||
coding_mode;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -835,7 +782,7 @@ static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
|
|||
*/
|
||||
static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
|
||||
{
|
||||
int i, j, k, l;
|
||||
int j, k, l, sb_x, sb_y;
|
||||
int coding_mode;
|
||||
int motion_x[6];
|
||||
int motion_y[6];
|
||||
|
|
@ -857,18 +804,17 @@ static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
|
|||
|
||||
/* iterate through all of the macroblocks that contain 1 or more
|
||||
* coded fragments */
|
||||
for (i = 0; i < s->u_superblock_start; i++) {
|
||||
for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
|
||||
for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
|
||||
|
||||
for (j = 0; j < 4; j++) {
|
||||
current_macroblock = s->superblock_macroblocks[i * 4 + j];
|
||||
if ((current_macroblock == -1) ||
|
||||
int mb_x = 2*sb_x + (j>>1);
|
||||
int mb_y = 2*sb_y + (((j>>1)+j)&1);
|
||||
current_macroblock = mb_y * s->macroblock_width + mb_x;
|
||||
|
||||
if (mb_x >= s->macroblock_width || mb_y >= s->macroblock_height ||
|
||||
(s->macroblock_coding[current_macroblock] == MODE_COPY))
|
||||
continue;
|
||||
if (current_macroblock >= s->macroblock_count) {
|
||||
av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vectors(): bad macroblock number (%d >= %d)\n",
|
||||
current_macroblock, s->macroblock_count);
|
||||
return 1;
|
||||
}
|
||||
|
||||
current_fragment = s->macroblock_fragments[current_macroblock * 6];
|
||||
if (current_fragment >= s->fragment_count) {
|
||||
|
|
@ -986,6 +932,7 @@ static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
|
|||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
|
@ -1834,10 +1781,9 @@ static av_cold int vp3_decode_init(AVCodecContext *avctx)
|
|||
|
||||
/* work out the block mapping tables */
|
||||
s->superblock_fragments = av_malloc(s->superblock_count * 16 * sizeof(int));
|
||||
s->superblock_macroblocks = av_malloc(s->superblock_count * 4 * sizeof(int));
|
||||
s->macroblock_fragments = av_malloc(s->macroblock_count * 6 * sizeof(int));
|
||||
s->macroblock_coding = av_malloc(s->macroblock_count + 1);
|
||||
if (!s->superblock_fragments || !s->superblock_macroblocks ||
|
||||
if (!s->superblock_fragments ||
|
||||
!s->macroblock_fragments || !s->macroblock_coding) {
|
||||
vp3_decode_end(avctx);
|
||||
return -1;
|
||||
|
|
@ -2035,7 +1981,6 @@ static av_cold int vp3_decode_end(AVCodecContext *avctx)
|
|||
av_free(s->coded_fragment_list);
|
||||
av_free(s->fast_fragment_list);
|
||||
av_free(s->superblock_fragments);
|
||||
av_free(s->superblock_macroblocks);
|
||||
av_free(s->macroblock_fragments);
|
||||
av_free(s->macroblock_coding);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue