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h264: move initializing the slice start out of h264_slice_header_parse()

This commit is contained in:
Anton Khirnov 2016-04-16 03:20:37 +02:00
parent 4cec43a9ee
commit 7ab5d577a9
2 changed files with 17 additions and 17 deletions
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1
libavcodec/h264.h
View File

@ -355,6 +355,7 @@ typedef struct H264SliceContext {
int mb_xy;
int resync_mb_x;
int resync_mb_y;
unsigned int first_mb_addr;
// index of the first MB of the next slice
int next_slice_idx;
int mb_skip_run;

33
libavcodec/h264_slice.c
View File

@ -905,7 +905,6 @@ static int h264_slice_header_parse(H264Context *h, H264SliceContext *sl)
{
const SPS *sps;
const PPS *pps;
unsigned int first_mb_in_slice;
unsigned int pps_id;
int ret;
unsigned int slice_type, tmp, i;
@ -915,9 +914,9 @@ static int h264_slice_header_parse(H264Context *h, H264SliceContext *sl)
int frame_num, droppable, picture_structure;
int mb_aff_frame = 0;
first_mb_in_slice = get_ue_golomb(&sl->gb);
sl->first_mb_addr = get_ue_golomb(&sl->gb);
if (first_mb_in_slice == 0) { // FIXME better field boundary detection
if (sl->first_mb_addr == 0) { // FIXME better field boundary detection
if (h->current_slice && h->cur_pic_ptr && FIELD_PICTURE(h)) {
ff_h264_field_end(h, sl, 1);
}
@ -936,7 +935,7 @@ static int h264_slice_header_parse(H264Context *h, H264SliceContext *sl)
if (slice_type > 9) {
av_log(h->avctx, AV_LOG_ERROR,
"slice type %d too large at %d\n",
slice_type, first_mb_in_slice);
slice_type, sl->first_mb_addr);
return AVERROR_INVALIDDATA;
}
if (slice_type > 4) {
@ -1274,19 +1273,6 @@ static int h264_slice_header_parse(H264Context *h, H264SliceContext *sl)
}
}
assert(h->mb_num == h->mb_width * h->mb_height);
if (first_mb_in_slice << FIELD_OR_MBAFF_PICTURE(h) >= h->mb_num ||
first_mb_in_slice >= h->mb_num) {
av_log(h->avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
return AVERROR_INVALIDDATA;
}
sl->resync_mb_x = sl->mb_x = first_mb_in_slice % h->mb_width;
sl->resync_mb_y = sl->mb_y = (first_mb_in_slice / h->mb_width) <<
FIELD_OR_MBAFF_PICTURE(h);
if (h->picture_structure == PICT_BOTTOM_FIELD)
sl->resync_mb_y = sl->mb_y = sl->mb_y + 1;
assert(sl->mb_y < h->mb_height);
if (h->picture_structure == PICT_FRAME) {
h->curr_pic_num = h->poc.frame_num;
h->max_pic_num = 1 << sps->log2_max_frame_num;
@ -1442,6 +1428,19 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl)
if (ret < 0)
return ret;
assert(h->mb_num == h->mb_width * h->mb_height);
if (sl->first_mb_addr << FIELD_OR_MBAFF_PICTURE(h) >= h->mb_num ||
sl->first_mb_addr >= h->mb_num) {
av_log(h->avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
return AVERROR_INVALIDDATA;
}
sl->resync_mb_x = sl->mb_x = sl->first_mb_addr % h->mb_width;
sl->resync_mb_y = sl->mb_y = (sl->first_mb_addr / h->mb_width) <<
FIELD_OR_MBAFF_PICTURE(h);
if (h->picture_structure == PICT_BOTTOM_FIELD)
sl->resync_mb_y = sl->mb_y = sl->mb_y + 1;
assert(sl->mb_y < h->mb_height);
if (!h->setup_finished)
ff_h264_init_poc(h->cur_pic_ptr->field_poc, &h->cur_pic_ptr->poc,
h->ps.sps, &h->poc, h->picture_structure, h->nal_ref_idc);