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diracdec: Read picture types by using parse_code

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This commit is contained in:
Kieran Kunhya 2015-12-09 00:05:36 +00:00 committed by Rostislav Pehlivanov
parent 8880ca2307
commit 7424a6d0a5
1 changed files with 42 additions and 15 deletions
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35
libavcodec/diracdec.c
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@ -154,7 +154,11 @@ typedef struct DiracContext {
int zero_res; /* zero residue flag */
int is_arith; /* whether coeffs use arith or golomb coding */
int core_syntax; /* use core syntax only */
int low_delay; /* use the low delay syntax */
int hq_picture; /* high quality picture, enables low_delay */
int ld_picture; /* use low delay picture, turns on low_delay */
int dc_prediction; /* has dc prediction */
int globalmc_flag; /* use global motion compensation */
int num_refs; /* number of reference pictures */
@ -871,15 +875,17 @@ static int decode_lowdelay(DiracContext *s)
avctx->execute(avctx, decode_lowdelay_slice, slices, NULL, slice_num,
sizeof(struct DiracSlice)); /* [DIRAC_STD] 13.5.2 Slices */
if (s->dc_prediction) {
if (s->pshift) {
intra_dc_prediction_10(&s->plane[0].band[0][0]);
intra_dc_prediction_10(&s->plane[1].band[0][0]);
intra_dc_prediction_10(&s->plane[2].band[0][0]);
intra_dc_prediction_10(&s->plane[0].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
intra_dc_prediction_10(&s->plane[1].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
intra_dc_prediction_10(&s->plane[2].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
} else {
intra_dc_prediction_8(&s->plane[0].band[0][0]);
intra_dc_prediction_8(&s->plane[1].band[0][0]);
intra_dc_prediction_8(&s->plane[2].band[0][0]);
}
}
av_free(slices);
return 0;
}
@ -1132,6 +1138,19 @@ static int dirac_unpack_idwt_params(DiracContext *s)
}
}
}
/* Codeblock parameters (core syntax only) */
if (s->core_syntax) {
if (get_bits1(gb)) {
for (i = 0; i <= s->wavelet_depth; i++) {
CHECKEDREAD(s->codeblock[i].width , tmp < 1 || tmp > (s->avctx->width >>s->wavelet_depth-i), "codeblock width invalid\n")
CHECKEDREAD(s->codeblock[i].height, tmp < 1 || tmp > (s->avctx->height>>s->wavelet_depth-i), "codeblock height invalid\n")
}
CHECKEDREAD(s->codeblock_mode, tmp > 1, "unknown codeblock mode\n")
} else {
for (i = 0; i <= s->wavelet_depth; i++)
s->codeblock[i].width = s->codeblock[i].height = 1;
}
}
return 0;
}
@ -1915,7 +1934,8 @@ static int dirac_decode_data_unit(AVCodecContext *avctx, const uint8_t *buf, int
{
DiracContext *s = avctx->priv_data;
DiracFrame *pic = NULL;
int ret, i, parse_code;
int ret, i;
uint8_t parse_code;
unsigned tmp;
if (size < DATA_UNIT_HEADER_SIZE)
@ -1982,10 +2002,17 @@ static int dirac_decode_data_unit(AVCodecContext *avctx, const uint8_t *buf, int
s->num_refs = tmp;
s->is_arith = (parse_code & 0x48) == 0x08; /* [DIRAC_STD] using_ac() */
s->low_delay = (parse_code & 0x88) == 0x88; /* [DIRAC_STD] is_low_delay() */
s->core_syntax = (parse_code & 0x88) == 0x08; /* [DIRAC_STD] is_core_syntax() */
s->ld_picture = (parse_code & 0xF8) == 0xC8; /* [DIRAC_STD] is_ld_picture() */
s->hq_picture = (parse_code & 0xF8) == 0xE8; /* [DIRAC_STD] is_hq_picture() */
s->dc_prediction = (parse_code & 0x28) == 0x08; /* [DIRAC_STD] using_dc_prediction() */
pic->reference = (parse_code & 0x0C) == 0x0C; /* [DIRAC_STD] is_reference() */
pic->avframe->key_frame = s->num_refs == 0; /* [DIRAC_STD] is_intra() */
pic->avframe->pict_type = s->num_refs + 1; /* Definition of AVPictureType in avutil.h */
if (s->version.minor == 2 && parse_code == 0x88)
s->ld_picture = 1;
if ((ret = get_buffer_with_edge(avctx, pic->avframe, (parse_code & 0x0C) == 0x0C ? AV_GET_BUFFER_FLAG_REF : 0)) < 0)
return ret;
s->current_picture = pic;