This will allow decoupling the parser from the decoder.
return profile;
}
-int ff_set_ref_count(H264Context *h, H264SliceContext *sl)
-{
- int ref_count[2], list_count;
- int num_ref_idx_active_override_flag, max_refs;
-
- // set defaults, might be overridden a few lines later
- ref_count[0] = h->pps.ref_count[0];
- ref_count[1] = h->pps.ref_count[1];
-
- if (sl->slice_type_nos != AV_PICTURE_TYPE_I) {
- num_ref_idx_active_override_flag = get_bits1(&sl->gb);
-
- if (num_ref_idx_active_override_flag) {
- ref_count[0] = get_ue_golomb(&sl->gb) + 1;
- if (ref_count[0] < 1)
- return AVERROR_INVALIDDATA;
- if (sl->slice_type_nos == AV_PICTURE_TYPE_B) {
- ref_count[1] = get_ue_golomb(&sl->gb) + 1;
- if (ref_count[1] < 1)
- return AVERROR_INVALIDDATA;
- }
- }
-
- if (sl->slice_type_nos == AV_PICTURE_TYPE_B)
- list_count = 2;
- else
- list_count = 1;
- } else {
- list_count = 0;
- ref_count[0] = ref_count[1] = 0;
- }
-
- max_refs = h->picture_structure == PICT_FRAME ? 16 : 32;
-
- if (ref_count[0] > max_refs || ref_count[1] > max_refs) {
- av_log(h->avctx, AV_LOG_ERROR, "reference overflow\n");
- sl->ref_count[0] = sl->ref_count[1] = 0;
- return AVERROR_INVALIDDATA;
- }
-
- sl->ref_count[0] = ref_count[0];
- sl->ref_count[1] = ref_count[1];
- sl->list_count = list_count;
-
- return 0;
-}
-
static int get_last_needed_nal(H264Context *h)
{
int nals_needed = 0;
void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl, int y, int height);
int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc);
-int ff_set_ref_count(H264Context *h, H264SliceContext *sl);
int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl);
int ff_h264_execute_decode_slices(H264Context *h, unsigned context_count);
return mode;
}
+
+int ff_h264_parse_ref_count(int *plist_count, int ref_count[2],
+ GetBitContext *gb, const PPS *pps,
+ int slice_type_nos, int picture_structure)
+{
+ int list_count;
+ int num_ref_idx_active_override_flag, max_refs;
+
+ // set defaults, might be overridden a few lines later
+ ref_count[0] = pps->ref_count[0];
+ ref_count[1] = pps->ref_count[1];
+
+ if (slice_type_nos != AV_PICTURE_TYPE_I) {
+ num_ref_idx_active_override_flag = get_bits1(gb);
+
+ if (num_ref_idx_active_override_flag) {
+ ref_count[0] = get_ue_golomb(gb) + 1;
+ if (ref_count[0] < 1)
+ return AVERROR_INVALIDDATA;
+ if (slice_type_nos == AV_PICTURE_TYPE_B) {
+ ref_count[1] = get_ue_golomb(gb) + 1;
+ if (ref_count[1] < 1)
+ return AVERROR_INVALIDDATA;
+ }
+ }
+
+ if (slice_type_nos == AV_PICTURE_TYPE_B)
+ list_count = 2;
+ else
+ list_count = 1;
+ } else {
+ list_count = 0;
+ ref_count[0] = ref_count[1] = 0;
+ }
+
+ max_refs = picture_structure == PICT_FRAME ? 16 : 32;
+
+ if (ref_count[0] > max_refs || ref_count[1] > max_refs) {
+ ref_count[0] = ref_count[1] = 0;
+ return AVERROR_INVALIDDATA;
+ }
+
+ *plist_count = list_count;
+
+ return 0;
+}
} H264PredWeightTable;
struct SPS;
+struct PPS;
int ff_h264_pred_weight_table(GetBitContext *gb, const struct SPS *sps,
const int *ref_count, int slice_type_nos,
int left_samples_available,
int mode, int is_chroma);
+int ff_h264_parse_ref_count(int *plist_count, int ref_count[2],
+ GetBitContext *gb, const struct PPS *pps,
+ int slice_type_nos, int picture_structure);
+
#endif /* AVCODEC_H264_PARSE_H */
H264ParseContext *p = s->priv_data;
H264Context *h = &p->h;
H264SliceContext *sl = &h->slice_ctx[0];
+ int list_count, ref_count[2];
sl->slice_type_nos = s->pict_type & 3;
if (sl->slice_type_nos == AV_PICTURE_TYPE_B)
get_bits1(&sl->gb); // direct_spatial_mv_pred
- if (ff_set_ref_count(h, sl) < 0)
+ if (ff_h264_parse_ref_count(&list_count, ref_count, &sl->gb, &h->pps,
+ sl->slice_type_nos, h->picture_structure) < 0)
return AVERROR_INVALIDDATA;
if (sl->slice_type_nos != AV_PICTURE_TYPE_I) {
int list;
- for (list = 0; list < sl->list_count; list++) {
+ for (list = 0; list < list_count; list++) {
if (get_bits1(&sl->gb)) {
int index;
for (index = 0; ; index++) {
} else
break;
- if (index >= sl->ref_count[list]) {
+ if (index >= ref_count[list]) {
av_log(h->avctx, AV_LOG_ERROR,
"reference count %d overflow\n", index);
return AVERROR_INVALIDDATA;
if ((h->pps.weighted_pred && sl->slice_type_nos == AV_PICTURE_TYPE_P) ||
(h->pps.weighted_bipred_idc == 1 && sl->slice_type_nos == AV_PICTURE_TYPE_B))
- ff_h264_pred_weight_table(&sl->gb, &h->sps, sl->ref_count, sl->slice_type_nos,
+ ff_h264_pred_weight_table(&sl->gb, &h->sps, ref_count, sl->slice_type_nos,
&sl->pwt);
if (get_bits1(&sl->gb)) { // adaptive_ref_pic_marking_mode_flag
if (sl->slice_type_nos == AV_PICTURE_TYPE_B)
sl->direct_spatial_mv_pred = get_bits1(&sl->gb);
- ret = ff_set_ref_count(h, sl);
+ ret = ff_h264_parse_ref_count(&sl->list_count, sl->ref_count,
+ &sl->gb, &h->pps, sl->slice_type_nos,
+ h->picture_structure);
if (ret < 0)
return ret;