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Merge "Extracting decode_tiles function." into experimental

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John Koleszar 2013-03-29 10:25:34 -07:00 committed by Gerrit Code Review
commit 282a89f329
1 changed files with 100 additions and 88 deletions
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188
vp9/decoder/vp9_decodframe.c
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@ -1520,6 +1520,101 @@ static void update_frame_context(VP9D_COMP *pbi, vp9_reader *r) {
#endif
}
static void decode_tiles(VP9D_COMP *pbi,
const uint8_t *data, int first_partition_size,
BOOL_DECODER *header_bc, BOOL_DECODER *residual_bc) {
VP9_COMMON *const pc = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
const uint8_t *data_ptr = data + first_partition_size;
int tile_row, tile_col, delta_log2_tiles;
int mb_row;
vp9_get_tile_n_bits(pc, &pc->log2_tile_columns, &delta_log2_tiles);
while (delta_log2_tiles--) {
if (vp9_read_bit(header_bc)) {
pc->log2_tile_columns++;
} else {
break;
}
}
pc->log2_tile_rows = vp9_read_bit(header_bc);
if (pc->log2_tile_rows)
pc->log2_tile_rows += vp9_read_bit(header_bc);
pc->tile_columns = 1 << pc->log2_tile_columns;
pc->tile_rows = 1 << pc->log2_tile_rows;
vpx_memset(pc->above_context, 0,
sizeof(ENTROPY_CONTEXT_PLANES) * pc->mb_cols);
if (pbi->oxcf.inv_tile_order) {
const int n_cols = pc->tile_columns;
const uint8_t *data_ptr2[4][1 << 6];
BOOL_DECODER UNINITIALIZED_IS_SAFE(bc_bak);
// pre-initialize the offsets, we're going to read in inverse order
data_ptr2[0][0] = data_ptr;
for (tile_row = 0; tile_row < pc->tile_rows; tile_row++) {
if (tile_row) {
const int size = read_le32(data_ptr2[tile_row - 1][n_cols - 1]);
data_ptr2[tile_row - 1][n_cols - 1] += 4;
data_ptr2[tile_row][0] = data_ptr2[tile_row - 1][n_cols - 1] + size;
}
for (tile_col = 1; tile_col < n_cols; tile_col++) {
const int size = read_le32(data_ptr2[tile_row][tile_col - 1]);
data_ptr2[tile_row][tile_col - 1] += 4;
data_ptr2[tile_row][tile_col] =
data_ptr2[tile_row][tile_col - 1] + size;
}
}
for (tile_row = 0; tile_row < pc->tile_rows; tile_row++) {
vp9_get_tile_row_offsets(pc, tile_row);
for (tile_col = n_cols - 1; tile_col >= 0; tile_col--) {
vp9_get_tile_col_offsets(pc, tile_col);
setup_token_decoder(pbi, data_ptr2[tile_row][tile_col], residual_bc);
// Decode a row of superblocks
for (mb_row = pc->cur_tile_mb_row_start;
mb_row < pc->cur_tile_mb_row_end; mb_row += 4) {
decode_sb_row(pbi, pc, mb_row, xd, residual_bc);
}
if (tile_row == pc->tile_rows - 1 && tile_col == n_cols - 1)
bc_bak = *residual_bc;
}
}
*residual_bc = bc_bak;
} else {
int has_more;
for (tile_row = 0; tile_row < pc->tile_rows; tile_row++) {
vp9_get_tile_row_offsets(pc, tile_row);
for (tile_col = 0; tile_col < pc->tile_columns; tile_col++) {
vp9_get_tile_col_offsets(pc, tile_col);
has_more = tile_col < pc->tile_columns - 1 ||
tile_row < pc->tile_rows - 1;
// Setup decoder
setup_token_decoder(pbi, data_ptr + (has_more ? 4 : 0), residual_bc);
// Decode a row of superblocks
for (mb_row = pc->cur_tile_mb_row_start;
mb_row < pc->cur_tile_mb_row_end; mb_row += 4) {
decode_sb_row(pbi, pc, mb_row, xd, residual_bc);
}
if (has_more) {
const int size = read_le32(data_ptr);
data_ptr += 4 + size;
}
}
}
}
}
int vp9_decode_frame(VP9D_COMP *pbi, const unsigned char **p_data_end) {
BOOL_DECODER header_bc, residual_bc;
VP9_COMMON *const pc = &pbi->common;
@ -1527,7 +1622,7 @@ int vp9_decode_frame(VP9D_COMP *pbi, const unsigned char **p_data_end) {
const uint8_t *data = (const uint8_t *)pbi->Source;
const uint8_t *data_end = data + pbi->source_sz;
ptrdiff_t first_partition_length_in_bytes = 0;
int mb_row, i, corrupt_tokens = 0;
int i, corrupt_tokens = 0;
// printf("Decoding frame %d\n", pc->current_video_frame);
@ -1766,91 +1861,8 @@ int vp9_decode_frame(VP9D_COMP *pbi, const unsigned char **p_data_end) {
vp9_decode_mode_mvs_init(pbi, &header_bc);
/* tile info */
{
const uint8_t *data_ptr = data + first_partition_length_in_bytes;
int tile_row, tile_col, delta_log2_tiles;
vp9_get_tile_n_bits(pc, &pc->log2_tile_columns, &delta_log2_tiles);
while (delta_log2_tiles--) {
if (vp9_read_bit(&header_bc)) {
pc->log2_tile_columns++;
} else {
break;
}
}
pc->log2_tile_rows = vp9_read_bit(&header_bc);
if (pc->log2_tile_rows)
pc->log2_tile_rows += vp9_read_bit(&header_bc);
pc->tile_columns = 1 << pc->log2_tile_columns;
pc->tile_rows = 1 << pc->log2_tile_rows;
vpx_memset(pc->above_context, 0,
sizeof(ENTROPY_CONTEXT_PLANES) * pc->mb_cols);
if (pbi->oxcf.inv_tile_order) {
const int n_cols = pc->tile_columns;
const uint8_t *data_ptr2[4][1 << 6];
BOOL_DECODER UNINITIALIZED_IS_SAFE(bc_bak);
// pre-initialize the offsets, we're going to read in inverse order
data_ptr2[0][0] = data_ptr;
for (tile_row = 0; tile_row < pc->tile_rows; tile_row++) {
if (tile_row) {
const int size = read_le32(data_ptr2[tile_row - 1][n_cols - 1]);
data_ptr2[tile_row - 1][n_cols - 1] += 4;
data_ptr2[tile_row][0] = data_ptr2[tile_row - 1][n_cols - 1] + size;
}
for (tile_col = 1; tile_col < n_cols; tile_col++) {
const int size = read_le32(data_ptr2[tile_row][tile_col - 1]);
data_ptr2[tile_row][tile_col - 1] += 4;
data_ptr2[tile_row][tile_col] =
data_ptr2[tile_row][tile_col - 1] + size;
}
}
for (tile_row = 0; tile_row < pc->tile_rows; tile_row++) {
vp9_get_tile_row_offsets(pc, tile_row);
for (tile_col = n_cols - 1; tile_col >= 0; tile_col--) {
vp9_get_tile_col_offsets(pc, tile_col);
setup_token_decoder(pbi, data_ptr2[tile_row][tile_col], &residual_bc);
/* Decode a row of superblocks */
for (mb_row = pc->cur_tile_mb_row_start;
mb_row < pc->cur_tile_mb_row_end; mb_row += 4) {
decode_sb_row(pbi, pc, mb_row, xd, &residual_bc);
}
if (tile_row == pc->tile_rows - 1 && tile_col == n_cols - 1)
bc_bak = residual_bc;
}
}
residual_bc = bc_bak;
} else {
for (tile_row = 0; tile_row < pc->tile_rows; tile_row++) {
vp9_get_tile_row_offsets(pc, tile_row);
for (tile_col = 0; tile_col < pc->tile_columns; tile_col++) {
vp9_get_tile_col_offsets(pc, tile_col);
if (tile_col < pc->tile_columns - 1 || tile_row < pc->tile_rows - 1)
setup_token_decoder(pbi, data_ptr + 4, &residual_bc);
else
setup_token_decoder(pbi, data_ptr, &residual_bc);
/* Decode a row of superblocks */
for (mb_row = pc->cur_tile_mb_row_start;
mb_row < pc->cur_tile_mb_row_end; mb_row += 4) {
decode_sb_row(pbi, pc, mb_row, xd, &residual_bc);
}
if (tile_col < pc->tile_columns - 1 || tile_row < pc->tile_rows - 1) {
int size = read_le32(data_ptr);
data_ptr += 4 + size;
}
}
}
}
}
decode_tiles(pbi, data, first_partition_length_in_bytes,
&header_bc, &residual_bc);
corrupt_tokens |= xd->corrupted;
// keep track of the last coded dimensions
@ -1902,8 +1914,8 @@ int vp9_decode_frame(VP9D_COMP *pbi, const unsigned char **p_data_end) {
#endif
/* Find the end of the coded buffer */
while (residual_bc.count > CHAR_BIT
&& residual_bc.count < VP9_BD_VALUE_SIZE) {
while (residual_bc.count > CHAR_BIT &&
residual_bc.count < VP9_BD_VALUE_SIZE) {
residual_bc.count -= CHAR_BIT;
residual_bc.user_buffer--;
}