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hevc: eliminate the second call to hls_nal_unit() 

Also, make hls_nal_unit() work only on the provided NAL unit, without
requiring a whole decoding context.

This will allow splitting this code for reuse by the parser.
This commit is contained in:
Anton Khirnov 2015-07-09 18:11:44 +02:00
parent d7bebe4805
commit ae05b48655
2 changed files with 20 additions and 17 deletions
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32
libavcodec/hevc.c
View File

@ -2345,24 +2345,24 @@ static int hls_slice_data(HEVCContext *s)
* @return AVERROR_INVALIDDATA if the packet is not a valid NAL unit,
* 0 if the unit should be skipped, 1 otherwise
*/
static int hls_nal_unit(HEVCContext *s)
static int hls_nal_unit(HEVCNAL *nal, AVCodecContext *avctx)
{
GetBitContext *gb = &s->HEVClc.gb;
GetBitContext *gb = &nal->gb;
int nuh_layer_id;
if (get_bits1(gb) != 0)
return AVERROR_INVALIDDATA;
s->nal_unit_type = get_bits(gb, 6);
nal->type = get_bits(gb, 6);
nuh_layer_id = get_bits(gb, 6);
s->temporal_id = get_bits(gb, 3) - 1;
if (s->temporal_id < 0)
nal->temporal_id = get_bits(gb, 3) - 1;
if (nal->temporal_id < 0)
return AVERROR_INVALIDDATA;
av_log(s->avctx, AV_LOG_DEBUG,
av_log(avctx, AV_LOG_DEBUG,
"nal_unit_type: %d, nuh_layer_id: %dtemporal_id: %d\n",
s->nal_unit_type, nuh_layer_id, s->temporal_id);
nal->type, nuh_layer_id, nal->temporal_id);
return nuh_layer_id == 0;
}
@ -2499,11 +2499,9 @@ static int decode_nal_unit(HEVCContext *s, const HEVCNAL *nal)
GetBitContext *gb = &lc->gb;
int ctb_addr_ts, ret;
ret = init_get_bits8(gb, nal->data, nal->size);
if (ret < 0)
return ret;
hls_nal_unit(s);
*gb = nal->gb;
s->nal_unit_type = nal->type;
s->temporal_id = nal->temporal_id;
switch (s->nal_unit_type) {
case NAL_VPS:
@ -2700,22 +2698,22 @@ static int decode_nal_units(HEVCContext *s, const uint8_t *buf, int length)
goto fail;
}
ret = init_get_bits8(&s->HEVClc.gb, nal->data, nal->size);
ret = init_get_bits8(&nal->gb, nal->data, nal->size);
if (ret < 0)
goto fail;
ret = hls_nal_unit(s);
ret = hls_nal_unit(nal, s->avctx);
if (ret <= 0) {
if (ret < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid NAL unit %d, skipping.\n",
s->nal_unit_type);
nal->type);
}
s->nb_nals--;
goto skip_nal;
}
if (s->nal_unit_type == NAL_EOB_NUT ||
s->nal_unit_type == NAL_EOS_NUT)
if (nal->type == NAL_EOB_NUT ||
nal->type == NAL_EOS_NUT)
s->eos = 1;
skip_nal:

5
libavcodec/hevc.h
View File

@ -711,6 +711,11 @@ typedef struct HEVCNAL {
int raw_size;
const uint8_t *raw_data;
GetBitContext gb;
enum NALUnitType type;
int temporal_id;
} HEVCNAL;
struct HEVCContext;