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h264_parser: Set field_order and picture_structure.

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Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Yusuke Nakamura 2013-05-15 07:37:36 +09:00 committed by Anton Khirnov
parent b493847df4
commit 3f1a7ceb2c
3 changed files with 64 additions and 6 deletions
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12
libavcodec/h264.c
View File

@ -2642,11 +2642,10 @@ static void flush_dpb(AVCodecContext *avctx)
h->parse_context.last_index = 0;
}
static int init_poc(H264Context *h)
int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc)
{
const int max_frame_num = 1 << h->sps.log2_max_frame_num;
int field_poc[2];
Picture *cur = h->cur_pic_ptr;
h->frame_num_offset = h->prev_frame_num_offset;
if (h->frame_num < h->prev_frame_num)
@ -2711,10 +2710,11 @@ static int init_poc(H264Context *h)
}
if (h->picture_structure != PICT_BOTTOM_FIELD)
h->cur_pic_ptr->field_poc[0] = field_poc[0];
pic_field_poc[0] = field_poc[0];
if (h->picture_structure != PICT_TOP_FIELD)
h->cur_pic_ptr->field_poc[1] = field_poc[1];
cur->poc = FFMIN(cur->field_poc[0], cur->field_poc[1]);
pic_field_poc[1] = field_poc[1];
if (pic_poc)
*pic_poc = FFMIN(pic_field_poc[0], pic_field_poc[1]);
return 0;
}
@ -3516,7 +3516,7 @@ static int decode_slice_header(H264Context *h, H264Context *h0)
h->delta_poc[1] = get_se_golomb(&h->gb);
}
init_poc(h);
ff_init_poc(h, h->cur_pic_ptr->field_poc, &h->cur_pic_ptr->poc);
if (h->pps.redundant_pic_cnt_present)
h->redundant_pic_count = get_ue_golomb(&h->gb);

1
libavcodec/h264.h
View File

@ -949,5 +949,6 @@ static av_always_inline int get_dct8x8_allowed(H264Context *h)
}
void ff_h264_draw_horiz_band(H264Context *h, int y, int height);
int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc);
#endif /* AVCODEC_H264_H */

57
libavcodec/h264_parser.c
View File

@ -116,10 +116,12 @@ static inline int parse_nal_units(AVCodecParserContext *s,
unsigned int slice_type;
int state = -1;
const uint8_t *ptr;
int field_poc[2];
/* set some sane default values */
s->pict_type = AV_PICTURE_TYPE_I;
s->key_frame = 0;
s->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
h->avctx= avctx;
h->sei_recovery_frame_cnt = -1;
@ -162,6 +164,11 @@ static inline int parse_nal_units(AVCodecParserContext *s,
break;
case NAL_IDR_SLICE:
s->key_frame = 1;
h->prev_frame_num = 0;
h->prev_frame_num_offset = 0;
h->prev_poc_msb =
h->prev_poc_lsb = 0;
/* fall through */
case NAL_SLICE:
get_ue_golomb(&h->gb); // skip first_mb_in_slice
@ -201,6 +208,24 @@ static inline int parse_nal_units(AVCodecParserContext *s,
}
}
if (h->nal_unit_type == NAL_IDR_SLICE)
get_ue_golomb(&h->gb); /* idr_pic_id */
if (h->sps.poc_type == 0) {
h->poc_lsb = get_bits(&h->gb, h->sps.log2_max_poc_lsb);
if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME)
h->delta_poc_bottom = get_se_golomb(&h->gb);
}
if (h->sps.poc_type == 1 && !h->sps.delta_pic_order_always_zero_flag) {
h->delta_poc[0] = get_se_golomb(&h->gb);
if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME)
h->delta_poc[1] = get_se_golomb(&h->gb);
}
ff_init_poc(h, field_poc, NULL);
if(h->sps.pic_struct_present_flag) {
switch (h->sei_pic_struct) {
case SEI_PIC_STRUCT_TOP_FIELD:
@ -230,6 +255,38 @@ static inline int parse_nal_units(AVCodecParserContext *s,
s->repeat_pict = h->picture_structure == PICT_FRAME ? 1 : 0;
}
if (h->picture_structure == PICT_FRAME) {
s->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
if (h->sps.pic_struct_present_flag) {
switch (h->sei_pic_struct) {
case SEI_PIC_STRUCT_TOP_BOTTOM:
case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
s->field_order = AV_FIELD_TT;
break;
case SEI_PIC_STRUCT_BOTTOM_TOP:
case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
s->field_order = AV_FIELD_BB;
break;
default:
s->field_order = AV_FIELD_PROGRESSIVE;
break;
}
} else {
if (field_poc[0] < field_poc[1])
s->field_order = AV_FIELD_TT;
else if (field_poc[0] > field_poc[1])
s->field_order = AV_FIELD_BB;
else
s->field_order = AV_FIELD_PROGRESSIVE;
}
} else {
if (h->picture_structure == PICT_TOP_FIELD)
s->picture_structure = AV_PICTURE_STRUCTURE_TOP_FIELD;
else
s->picture_structure = AV_PICTURE_STRUCTURE_BOTTOM_FIELD;
s->field_order = AV_FIELD_UNKNOWN;
}
return 0; /* no need to evaluate the rest */
}
buf += consumed;