generic-library/vpx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Merge "Adding setup_quantization function." into experimental

Browse Source
This commit is contained in:
Dmitry Kovalev 2013-04-10 10:16:30 -07:00 committed by Gerrit Code Review
commit 2759ce85ad
1 changed files with 18 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
vp9/decoder/vp9_decodframe.c
View File

@ -118,11 +118,10 @@ void vp9_init_de_quantizer(VP9D_COMP *pbi) {
static int get_qindex(MACROBLOCKD *mb, int segment_id, int base_qindex) {
// Set the Q baseline allowing for any segment level adjustment
if (vp9_segfeature_active(mb, segment_id, SEG_LVL_ALT_Q)) {
if (mb->mb_segment_abs_delta == SEGMENT_ABSDATA)
return vp9_get_segdata(mb, segment_id, SEG_LVL_ALT_Q); // Abs Value
else
return clamp(base_qindex + vp9_get_segdata(mb, segment_id, SEG_LVL_ALT_Q),
0, MAXQ); // Delta Value
const int data = vp9_get_segdata(mb, segment_id, SEG_LVL_ALT_Q);
return mb->mb_segment_abs_delta == SEGMENT_ABSDATA ?
data : // Abs value
clamp(base_qindex + data, 0, MAXQ); // Delta value
} else {
return base_qindex;
}
@ -1314,6 +1313,19 @@ static void setup_loopfilter(VP9_COMMON *pc, MACROBLOCKD *xd, vp9_reader *r) {
}
}
static void setup_quantization(VP9D_COMP *pbi, vp9_reader *r) {
// Read the default quantizers
VP9_COMMON *const pc = &pbi->common;
pc->base_qindex = vp9_read_literal(r, QINDEX_BITS);
if (get_delta_q(r, &pc->y1dc_delta_q) |
get_delta_q(r, &pc->uvdc_delta_q) |
get_delta_q(r, &pc->uvac_delta_q))
vp9_init_de_quantizer(pbi);
mb_init_dequantizer(pbi, &pbi->mb); // MB level dequantizer setup
}
static const uint8_t *read_frame_size(VP9_COMMON *const pc, const uint8_t *data,
const uint8_t *data_end,
int *width, int *height) {
@ -1616,22 +1628,7 @@ int vp9_decode_frame(VP9D_COMP *pbi, const uint8_t **p_data_end) {
// Dummy read for now
vp9_read_literal(&header_bc, 2);
// Read the default quantizers.
{
int q_update = 0;
pc->base_qindex = vp9_read_literal(&header_bc, QINDEX_BITS);
// AC 1st order Q = default
q_update = get_delta_q(&header_bc, &pc->y1dc_delta_q) |
get_delta_q(&header_bc, &pc->uvdc_delta_q) |
get_delta_q(&header_bc, &pc->uvac_delta_q);
if (q_update)
vp9_init_de_quantizer(pbi);
// MB level dequantizer setup
mb_init_dequantizer(pbi, &pbi->mb);
}
setup_quantization(pbi, &header_bc);
// Determine if the golden frame or ARF buffer should be updated and how.
// For all non key frames the GF and ARF refresh flags and sign bias