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Transforming decode_sb_row to decode_tile function.

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Also moving frame size check into read_frame_size function.

Change-Id: Ib098d83bd50081bfc2941c87aea0dc58cb39583e
This commit is contained in:
Dmitry Kovalev 2013-04-17 13:42:51 -07:00
parent 88192546cf
commit 27533fa245
1 changed files with 23 additions and 33 deletions
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56
vp9/decoder/vp9_decodframe.c
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@ -890,16 +890,18 @@ static void decode_modes_sb(VP9D_COMP *pbi, int mb_row, int mb_col,
}
/* Decode a row of Superblocks (4x4 region of MBs) */
static void decode_sb_row(VP9D_COMP *pbi, int mb_row, vp9_reader* r) {
static void decode_tile(VP9D_COMP *pbi, vp9_reader* r) {
VP9_COMMON *const pc = &pbi->common;
int mb_col;
int mb_row, mb_col;
// For a SB there are 2 left contexts, each pertaining to a MB row within
vpx_memset(pc->left_context, 0, sizeof(pc->left_context));
for (mb_col = pc->cur_tile_mb_col_start;
mb_col < pc->cur_tile_mb_col_end; mb_col += 4) {
decode_modes_sb(pbi, mb_row, mb_col, r, BLOCK_SIZE_SB64X64);
for (mb_row = pc->cur_tile_mb_row_start;
mb_row < pc->cur_tile_mb_row_end; mb_row += 4) {
// For a SB there are 2 left contexts, each pertaining to a MB row within
vpx_memset(pc->left_context, 0, sizeof(pc->left_context));
for (mb_col = pc->cur_tile_mb_col_start;
mb_col < pc->cur_tile_mb_col_end; mb_col += 4) {
decode_modes_sb(pbi, mb_row, mb_col, r, BLOCK_SIZE_SB64X64);
}
}
}
@ -1237,8 +1239,17 @@ static const uint8_t *read_frame_size(VP9_COMMON *const pc, const uint8_t *data,
const uint8_t *data_end,
int *width, int *height) {
if (data + 4 < data_end) {
*width = read_le16(data);
*height = read_le16(data + 2);
const int w = read_le16(data);
const int h = read_le16(data + 2);
if (w <= 0)
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
"Invalid frame width");
if (h <= 0)
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
"Invalid frame height");
*width = w;
*height = h;
data += 4;
} else {
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
@ -1264,14 +1275,6 @@ static const uint8_t *setup_frame_size(VP9D_COMP *pbi, int scaling_active,
data = read_frame_size(pc, data, data_end, &width, &height);
if (pc->width != width || pc->height != height) {
if (width <= 0)
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
"Invalid frame width");
if (height <= 0)
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
"Invalid frame height");
if (!pbi->initial_width || !pbi->initial_height) {
if (vp9_alloc_frame_buffers(pc, width, height))
vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
@ -1364,7 +1367,6 @@ static void decode_tiles(VP9D_COMP *pbi,
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--) {
@ -1410,13 +1412,7 @@ static void decode_tiles(VP9D_COMP *pbi,
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, mb_row, residual_bc);
}
decode_tile(pbi, residual_bc);
if (tile_row == pc->tile_rows - 1 && tile_col == n_cols - 1)
bc_bak = *residual_bc;
}
@ -1433,14 +1429,8 @@ static void decode_tiles(VP9D_COMP *pbi,
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, mb_row, residual_bc);
}
decode_tile(pbi, residual_bc);
if (has_more) {
const int size = read_le32(data_ptr);