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ffmpeg.wasm-core
Commit ea676144 authored by David Conrad's avatar David Conrad
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Eliminate macroblock -> fragment mapping array 

Originally committed as revision 21801 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 19cd517d
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Showing with 33 additions and 50 deletions
libavcodec/vp3.c
View file @ ea676144
......@@ -206,10 +206,6 @@ typedef struct Vp3DecodeContext {
* index. */
int *superblock_fragments;
/* 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). */
int *macroblock_fragments;
/* This is an array that indicates how a particular macroblock
* is coded. */
unsigned char *macroblock_coding;
......@@ -353,46 +349,34 @@ static int init_block_mapping(Vp3DecodeContext *s)
/* initialize the macroblock <-> fragment mapping */
current_fragment = 0;
current_macroblock = 0;
mapping_index = 0;
for (i = 0; i < s->fragment_height; i += 2) {
for (j = 0; j < s->fragment_width; j += 2) {
s->all_fragments[current_fragment].macroblock = current_macroblock;
s->macroblock_fragments[mapping_index++] = current_fragment;
if (j + 1 < s->fragment_width) {
s->all_fragments[current_fragment + 1].macroblock = current_macroblock;
s->macroblock_fragments[mapping_index++] = current_fragment + 1;
} else
s->macroblock_fragments[mapping_index++] = -1;
}
if (i + 1 < s->fragment_height) {
s->all_fragments[current_fragment + s->fragment_width].macroblock =
current_macroblock;
s->macroblock_fragments[mapping_index++] =
current_fragment + s->fragment_width;
} else
s->macroblock_fragments[mapping_index++] = -1;
}
if ((j + 1 < s->fragment_width) && (i + 1 < s->fragment_height)) {
s->all_fragments[current_fragment + s->fragment_width + 1].macroblock =
current_macroblock;
s->macroblock_fragments[mapping_index++] =
current_fragment + s->fragment_width + 1;
} else
s->macroblock_fragments[mapping_index++] = -1;
}
/* C planes */
c_fragment = s->fragment_start[1] +
(i * s->fragment_width / 4) + (j / 2);
s->all_fragments[c_fragment].macroblock = s->macroblock_count;
s->macroblock_fragments[mapping_index++] = c_fragment;
c_fragment = s->fragment_start[2] +
(i * s->fragment_width / 4) + (j / 2);
s->all_fragments[c_fragment].macroblock = s->macroblock_count;
s->macroblock_fragments[mapping_index++] = c_fragment;
if (j + 2 <= s->fragment_width)
current_fragment += 2;
......@@ -742,6 +726,9 @@ static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
(s->macroblock_coding[current_macroblock] == MODE_COPY))
continue;
#define BLOCK_X (2*mb_x + (k&1))
#define BLOCK_Y (2*mb_y + (k>>1))
/* mode 7 means get 3 bits for each coding mode */
if (scheme == 7)
coding_mode = get_bits(gb, 3);
......@@ -753,16 +740,17 @@ static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
[get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
s->macroblock_coding[current_macroblock] = coding_mode;
for (k = 0; k < 6; k++) {
for (k = 0; k < 4; k++) {
current_fragment =
s->macroblock_fragments[current_macroblock * 6 + k];
if (current_fragment == -1)
continue;
if (current_fragment >= s->fragment_count) {
av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_modes(): bad fragment number (%d >= %d)\n",
current_fragment, s->fragment_count);
return 1;
}
BLOCK_Y*s->fragment_width + BLOCK_X;
if (s->all_fragments[current_fragment].coding_method !=
MODE_COPY)
s->all_fragments[current_fragment].coding_method =
coding_mode;
}
for (k = 0; k < 2; k++) {
current_fragment = s->fragment_start[k+1] +
mb_y*(s->fragment_width>>1) + mb_x;
if (s->all_fragments[current_fragment].coding_method !=
MODE_COPY)
s->all_fragments[current_fragment].coding_method =
......@@ -816,12 +804,6 @@ static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
(s->macroblock_coding[current_macroblock] == MODE_COPY))
continue;
current_fragment = s->macroblock_fragments[current_macroblock * 6];
if (current_fragment >= s->fragment_count) {
av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vectors(): bad fragment number (%d >= %d\n",
current_fragment, s->fragment_count);
return 1;
}
switch (s->macroblock_coding[current_macroblock]) {
case MODE_INTER_PLUS_MV:
......@@ -854,8 +836,9 @@ static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
* Y fragment, then average for the C fragment vectors */
motion_x[4] = motion_y[4] = 0;
for (k = 0; k < 4; k++) {
current_fragment = BLOCK_Y*s->fragment_width + BLOCK_X;
for (l = 0; l < s->coded_fragment_list_index; l++)
if (s->coded_fragment_list[l] == s->macroblock_fragments[6*current_macroblock + k])
if (s->coded_fragment_list[l] == current_fragment)
break;
if (l < s->coded_fragment_list_index) {
if (coding_mode == 0) {
......@@ -913,16 +896,9 @@ static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
}
/* assign the motion vectors to the correct fragments */
for (k = 0; k < 6; k++) {
for (k = 0; k < 4; k++) {
current_fragment =
s->macroblock_fragments[current_macroblock * 6 + k];
if (current_fragment == -1)
continue;
if (current_fragment >= s->fragment_count) {
av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vectors(): bad fragment number (%d >= %d)\n",
current_fragment, s->fragment_count);
return 1;
}
BLOCK_Y*s->fragment_width + BLOCK_X;
if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
s->all_fragments[current_fragment].motion_x = motion_x[k];
s->all_fragments[current_fragment].motion_y = motion_y[k];
......@@ -931,6 +907,17 @@ static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
s->all_fragments[current_fragment].motion_y = motion_y[0];
}
}
for (k = 0; k < 2; k++) {
current_fragment = s->fragment_start[k+1] +
mb_y*(s->fragment_width>>1) + mb_x;
if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
s->all_fragments[current_fragment].motion_x = motion_x[k+4];
s->all_fragments[current_fragment].motion_y = motion_y[k+4];
} else {
s->all_fragments[current_fragment].motion_x = motion_x[0];
s->all_fragments[current_fragment].motion_y = motion_y[0];
}
}
}
}
}
......@@ -1441,7 +1428,6 @@ static void render_slice(Vp3DecodeContext *s, int slice)
int motion_halfpel_index;
uint8_t *motion_source;
int plane;
int current_macroblock_entry = slice * s->macroblock_width * 6;
if (slice >= s->macroblock_height)
return;
......@@ -1455,7 +1441,7 @@ static void render_slice(Vp3DecodeContext *s, int slice)
int plane_height = s->height >> !!plane;
int y = slice * FRAGMENT_PIXELS << !plane ;
int slice_height = y + (FRAGMENT_PIXELS << !plane);
int i = s->macroblock_fragments[current_macroblock_entry + plane + 3*!!plane];
int i = s->fragment_start[plane] + (y>>3)*(s->fragment_width>>!!plane);
if (!s->flipped_image) stride = -stride;
......@@ -1781,10 +1767,8 @@ 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->macroblock_fragments = av_malloc(s->macroblock_count * 6 * sizeof(int));
s->macroblock_coding = av_malloc(s->macroblock_count + 1);
if (!s->superblock_fragments ||
!s->macroblock_fragments || !s->macroblock_coding) {
if (!s->superblock_fragments || !s->macroblock_coding) {
vp3_decode_end(avctx);
return -1;
}
......@@ -1981,7 +1965,6 @@ 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->macroblock_fragments);
av_free(s->macroblock_coding);
for (i = 0; i < 16; i++) {
......
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