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Code Issues Releases Activity

avcodec/hevcdec: remove HEVCContext usage from ff_hevc_compute_poc()

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Move it to hevc_ps as well. This is in preparation for a following patch.

Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com>
Reviewed-by: Aaron Levinson <alevinsn@aracnet.com>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2017-04-30 16:49:41 -03:00
parent a687fb9970
commit 1d53b8e907
6 changed files with 30 additions and 30 deletions
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2
libavcodec/hevc_parser.c
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@ -379,7 +379,7 @@ static inline int parse_nal_units(AVCodecParserContext *s, const uint8_t *buf,
if (!IS_IDR(h)) {
sh->pic_order_cnt_lsb = get_bits(gb, ps->sps->log2_max_poc_lsb);
s->output_picture_number = h->poc = ff_hevc_compute_poc(h, sh->pic_order_cnt_lsb);
s->output_picture_number = h->poc = ff_hevc_compute_poc(h->ps.sps, h->pocTid0, sh->pic_order_cnt_lsb, h->nal_unit_type);
} else
s->output_picture_number = h->poc = 0;

23
libavcodec/hevc_ps.c
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@ -1665,3 +1665,26 @@ err:
av_buffer_unref(&pps_buf);
return ret;
}
int ff_hevc_compute_poc(const HEVCSPS *sps, int pocTid0, int poc_lsb, int nal_unit_type)
{
int max_poc_lsb = 1 << sps->log2_max_poc_lsb;
int prev_poc_lsb = pocTid0 % max_poc_lsb;
int prev_poc_msb = pocTid0 - prev_poc_lsb;
int poc_msb;
if (poc_lsb < prev_poc_lsb && prev_poc_lsb - poc_lsb >= max_poc_lsb / 2)
poc_msb = prev_poc_msb + max_poc_lsb;
else if (poc_lsb > prev_poc_lsb && poc_lsb - prev_poc_lsb > max_poc_lsb / 2)
poc_msb = prev_poc_msb - max_poc_lsb;
else
poc_msb = prev_poc_msb;
// For BLA picture types, POCmsb is set to 0.
if (nal_unit_type == HEVC_NAL_BLA_W_LP ||
nal_unit_type == HEVC_NAL_BLA_W_RADL ||
nal_unit_type == HEVC_NAL_BLA_N_LP)
poc_msb = 0;
return poc_msb + poc_lsb;
}

5
libavcodec/hevc_ps.h
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@ -344,4 +344,9 @@ int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx,
int ff_hevc_encode_nal_vps(HEVCVPS *vps, unsigned int id,
uint8_t *buf, int buf_size);
/**
* Compute POC of the current frame and return it.
*/
int ff_hevc_compute_poc(const HEVCSPS *sps, int pocTid0, int poc_lsb, int nal_unit_type);
#endif /* AVCODEC_HEVC_PS_H */

23
libavcodec/hevc_refs.c
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@ -516,29 +516,6 @@ fail:
return ret;
}
int ff_hevc_compute_poc(HEVCContext *s, int poc_lsb)
{
int max_poc_lsb = 1 << s->ps.sps->log2_max_poc_lsb;
int prev_poc_lsb = s->pocTid0 % max_poc_lsb;
int prev_poc_msb = s->pocTid0 - prev_poc_lsb;
int poc_msb;
if (poc_lsb < prev_poc_lsb && prev_poc_lsb - poc_lsb >= max_poc_lsb / 2)
poc_msb = prev_poc_msb + max_poc_lsb;
else if (poc_lsb > prev_poc_lsb && poc_lsb - prev_poc_lsb > max_poc_lsb / 2)
poc_msb = prev_poc_msb - max_poc_lsb;
else
poc_msb = prev_poc_msb;
// For BLA picture types, POCmsb is set to 0.
if (s->nal_unit_type == HEVC_NAL_BLA_W_LP ||
s->nal_unit_type == HEVC_NAL_BLA_W_RADL ||
s->nal_unit_type == HEVC_NAL_BLA_N_LP)
poc_msb = 0;
return poc_msb + poc_lsb;
}
int ff_hevc_frame_nb_refs(HEVCContext *s)
{
int ret = 0;

2
libavcodec/hevcdec.c
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@ -541,7 +541,7 @@ static int hls_slice_header(HEVCContext *s)
int poc, pos;
sh->pic_order_cnt_lsb = get_bits(gb, s->ps.sps->log2_max_poc_lsb);
poc = ff_hevc_compute_poc(s, sh->pic_order_cnt_lsb);
poc = ff_hevc_compute_poc(s->ps.sps, s->pocTid0, sh->pic_order_cnt_lsb, s->nal_unit_type);
if (!sh->first_slice_in_pic_flag && poc != s->poc) {
av_log(s->avctx, AV_LOG_WARNING,
"Ignoring POC change between slices: %d -> %d\n", s->poc, poc);

5
libavcodec/hevcdec.h
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@ -579,11 +579,6 @@ void ff_hevc_clear_refs(HEVCContext *s);
*/
void ff_hevc_flush_dpb(HEVCContext *s);
/**
* Compute POC of the current frame and return it.
*/
int ff_hevc_compute_poc(HEVCContext *s, int poc_lsb);
RefPicList *ff_hevc_get_ref_list(HEVCContext *s, HEVCFrame *frame,
int x0, int y0);