2 * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
3 * Copyright (C) 2009 David Conrad
4 * Copyright (C) 2011 Jordi Ortiz
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 * @author Marco Gerards <marco@gnu.org>, David Conrad, Jordi Ortiz <nenjordi@gmail.com>
31 #include "bytestream.h"
34 #include "dirac_arith.h"
35 #include "mpeg12data.h"
36 #include "libavcodec/mpegvideo.h"
37 #include "mpegvideoencdsp.h"
38 #include "dirac_dwt.h"
44 * The spec limits the number of wavelet decompositions to 4 for both
45 * level 1 (VC-2) and 128 (long-gop default).
46 * 5 decompositions is the maximum before >16-bit buffers are needed.
47 * Schroedinger allows this for DD 9,7 and 13,7 wavelets only, limiting
48 * the others to 4 decompositions (or 3 for the fidelity filter).
50 * We use this instead of MAX_DECOMPOSITIONS to save some memory.
52 #define MAX_DWT_LEVELS 5
55 * The spec limits this to 3 for frame coding, but in practice can be as high as 6
57 #define MAX_REFERENCE_FRAMES 8
58 #define MAX_DELAY 5 /* limit for main profile for frame coding (TODO: field coding) */
59 #define MAX_FRAMES (MAX_REFERENCE_FRAMES + MAX_DELAY + 1)
60 #define MAX_QUANT 68 /* max quant for VC-2 */
61 #define MAX_BLOCKSIZE 32 /* maximum xblen/yblen we support */
64 * DiracBlock->ref flags, if set then the block does MC from the given ref
66 #define DIRAC_REF_MASK_REF1 1
67 #define DIRAC_REF_MASK_REF2 2
68 #define DIRAC_REF_MASK_GLOBAL 4
71 * Value of Picture.reference when Picture is not a reference picture, but
72 * is held for delayed output.
74 #define DELAYED_PIC_REF 4
76 #define CALC_PADDING(size, depth) \
77 (((size + (1 << depth) - 1) >> depth) << depth)
79 #define DIVRNDUP(a, b) (((a) + (b) - 1) / (b))
83 int interpolated
[3]; /* 1 if hpel[] is valid */
85 uint8_t *hpel_base
[3][4];
92 } u
; /* anonymous unions aren't in C99 :( */
96 typedef struct SubBand
{
104 struct SubBand
*parent
;
108 const uint8_t *coeff_data
;
111 typedef struct Plane
{
120 IDWTELEM
*idwt_buf_base
;
126 /* block separation (block n+1 starts after this many pixels in block n) */
129 /* amount of overspill on each edge (half of the overlap between blocks) */
133 SubBand band
[MAX_DWT_LEVELS
][4];
136 typedef struct DiracContext
{
137 AVCodecContext
*avctx
;
138 MpegvideoEncDSPContext mpvencdsp
;
139 VideoDSPContext vdsp
;
140 DiracDSPContext diracdsp
;
142 dirac_source_params source
;
143 int seen_sequence_header
;
144 int frame_number
; /* number of the next frame to display */
149 int zero_res
; /* zero residue flag */
150 int is_arith
; /* whether coeffs use arith or golomb coding */
151 int low_delay
; /* use the low delay syntax */
152 int globalmc_flag
; /* use global motion compensation */
153 int num_refs
; /* number of reference pictures */
155 /* wavelet decoding */
156 unsigned wavelet_depth
; /* depth of the IDWT */
157 unsigned wavelet_idx
;
160 * schroedinger older than 1.0.8 doesn't store
161 * quant delta if only one codebook exists in a band
163 unsigned old_delta_quant
;
164 unsigned codeblock_mode
;
169 } codeblock
[MAX_DWT_LEVELS
+1];
172 unsigned num_x
; /* number of horizontal slices */
173 unsigned num_y
; /* number of vertical slices */
174 AVRational bytes
; /* average bytes per slice */
175 uint8_t quant
[MAX_DWT_LEVELS
][4]; /* [DIRAC_STD] E.1 */
179 int pan_tilt
[2]; /* pan/tilt vector */
180 int zrs
[2][2]; /* zoom/rotate/shear matrix */
181 int perspective
[2]; /* perspective vector */
183 unsigned perspective_exp
;
186 /* motion compensation */
187 uint8_t mv_precision
; /* [DIRAC_STD] REFS_WT_PRECISION */
188 int16_t weight
[2]; /* [DIRAC_STD] REF1_WT and REF2_WT */
189 unsigned weight_log2denom
; /* [DIRAC_STD] REFS_WT_PRECISION */
191 int blwidth
; /* number of blocks (horizontally) */
192 int blheight
; /* number of blocks (vertically) */
193 int sbwidth
; /* number of superblocks (horizontally) */
194 int sbheight
; /* number of superblocks (vertically) */
197 DiracBlock
*blmotion
;
199 uint8_t *edge_emu_buffer
[4];
200 uint8_t *edge_emu_buffer_base
;
202 uint16_t *mctmp
; /* buffer holding the MC data multiplied by OBMC weights */
206 DECLARE_ALIGNED(16, uint8_t, obmc_weight
)[3][MAX_BLOCKSIZE
*MAX_BLOCKSIZE
];
208 void (*put_pixels_tab
[4])(uint8_t *dst
, const uint8_t *src
[5], int stride
, int h
);
209 void (*avg_pixels_tab
[4])(uint8_t *dst
, const uint8_t *src
[5], int stride
, int h
);
210 void (*add_obmc
)(uint16_t *dst
, const uint8_t *src
, int stride
, const uint8_t *obmc_weight
, int yblen
);
211 dirac_weight_func weight_func
;
212 dirac_biweight_func biweight_func
;
214 DiracFrame
*current_picture
;
215 DiracFrame
*ref_pics
[2];
217 DiracFrame
*ref_frames
[MAX_REFERENCE_FRAMES
+1];
218 DiracFrame
*delay_frames
[MAX_DELAY
+1];
219 DiracFrame all_frames
[MAX_FRAMES
];
223 * Dirac Specification ->
224 * Parse code values. 9.6.1 Table 9.1
226 enum dirac_parse_code
{
227 pc_seq_header
= 0x00,
241 static const uint8_t default_qmat
[][4][4] = {
242 { { 5, 3, 3, 0}, { 0, 4, 4, 1}, { 0, 5, 5, 2}, { 0, 6, 6, 3} },
243 { { 4, 2, 2, 0}, { 0, 4, 4, 2}, { 0, 5, 5, 3}, { 0, 7, 7, 5} },
244 { { 5, 3, 3, 0}, { 0, 4, 4, 1}, { 0, 5, 5, 2}, { 0, 6, 6, 3} },
245 { { 8, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0} },
246 { { 8, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0} },
247 { { 0, 4, 4, 8}, { 0, 8, 8, 12}, { 0, 13, 13, 17}, { 0, 17, 17, 21} },
248 { { 3, 1, 1, 0}, { 0, 4, 4, 2}, { 0, 6, 6, 5}, { 0, 9, 9, 7} },
251 static const int qscale_tab
[MAX_QUANT
+1] = {
252 4, 5, 6, 7, 8, 10, 11, 13,
253 16, 19, 23, 27, 32, 38, 45, 54,
254 64, 76, 91, 108, 128, 152, 181, 215,
255 256, 304, 362, 431, 512, 609, 724, 861,
256 1024, 1218, 1448, 1722, 2048, 2435, 2896, 3444,
257 4096, 4871, 5793, 6889, 8192, 9742, 11585, 13777,
258 16384, 19484, 23170, 27554, 32768, 38968, 46341, 55109,
262 static const int qoffset_intra_tab
[MAX_QUANT
+1] = {
263 1, 2, 3, 4, 4, 5, 6, 7,
264 8, 10, 12, 14, 16, 19, 23, 27,
265 32, 38, 46, 54, 64, 76, 91, 108,
266 128, 152, 181, 216, 256, 305, 362, 431,
267 512, 609, 724, 861, 1024, 1218, 1448, 1722,
268 2048, 2436, 2897, 3445, 4096, 4871, 5793, 6889,
269 8192, 9742, 11585, 13777, 16384, 19484, 23171, 27555,
273 static const int qoffset_inter_tab
[MAX_QUANT
+1] = {
274 1, 2, 2, 3, 3, 4, 4, 5,
275 6, 7, 9, 10, 12, 14, 17, 20,
276 24, 29, 34, 41, 48, 57, 68, 81,
277 96, 114, 136, 162, 192, 228, 272, 323,
278 384, 457, 543, 646, 768, 913, 1086, 1292,
279 1536, 1827, 2172, 2583, 3072, 3653, 4344, 5166,
280 6144, 7307, 8689, 10333, 12288, 14613, 17378, 20666,
284 /* magic number division by 3 from schroedinger */
285 static inline int divide3(int x
)
287 return ((x
+1)*21845 + 10922) >> 16;
290 static DiracFrame
*remove_frame(DiracFrame
*framelist
[], int picnum
)
292 DiracFrame
*remove_pic
= NULL
;
293 int i
, remove_idx
= -1;
295 for (i
= 0; framelist
[i
]; i
++)
296 if (framelist
[i
]->avframe
->display_picture_number
== picnum
) {
297 remove_pic
= framelist
[i
];
302 for (i
= remove_idx
; framelist
[i
]; i
++)
303 framelist
[i
] = framelist
[i
+1];
308 static int add_frame(DiracFrame
*framelist
[], int maxframes
, DiracFrame
*frame
)
311 for (i
= 0; i
< maxframes
; i
++)
313 framelist
[i
] = frame
;
319 static int alloc_sequence_buffers(DiracContext
*s
)
321 int sbwidth
= DIVRNDUP(s
->source
.width
, 4);
322 int sbheight
= DIVRNDUP(s
->source
.height
, 4);
323 int i
, w
, h
, top_padding
;
325 /* todo: think more about this / use or set Plane here */
326 for (i
= 0; i
< 3; i
++) {
327 int max_xblen
= MAX_BLOCKSIZE
>> (i
? s
->chroma_x_shift
: 0);
328 int max_yblen
= MAX_BLOCKSIZE
>> (i
? s
->chroma_y_shift
: 0);
329 w
= s
->source
.width
>> (i
? s
->chroma_x_shift
: 0);
330 h
= s
->source
.height
>> (i
? s
->chroma_y_shift
: 0);
332 /* we allocate the max we support here since num decompositions can
333 * change from frame to frame. Stride is aligned to 16 for SIMD, and
334 * 1<<MAX_DWT_LEVELS top padding to avoid if(y>0) in arith decoding
335 * MAX_BLOCKSIZE padding for MC: blocks can spill up to half of that
337 top_padding
= FFMAX(1<<MAX_DWT_LEVELS
, max_yblen
/2);
338 w
= FFALIGN(CALC_PADDING(w
, MAX_DWT_LEVELS
), 8); /* FIXME: Should this be 16 for SSE??? */
339 h
= top_padding
+ CALC_PADDING(h
, MAX_DWT_LEVELS
) + max_yblen
/2;
341 s
->plane
[i
].idwt_buf_base
= av_mallocz_array((w
+max_xblen
), h
* sizeof(IDWTELEM
));
342 s
->plane
[i
].idwt_tmp
= av_malloc_array((w
+16), sizeof(IDWTELEM
));
343 s
->plane
[i
].idwt_buf
= s
->plane
[i
].idwt_buf_base
+ top_padding
*w
;
344 if (!s
->plane
[i
].idwt_buf_base
|| !s
->plane
[i
].idwt_tmp
)
345 return AVERROR(ENOMEM
);
348 /* fixme: allocate using real stride here */
349 s
->sbsplit
= av_malloc_array(sbwidth
, sbheight
);
350 s
->blmotion
= av_malloc_array(sbwidth
, sbheight
* 16 * sizeof(*s
->blmotion
));
352 if (!s
->sbsplit
|| !s
->blmotion
)
353 return AVERROR(ENOMEM
);
357 static int alloc_buffers(DiracContext
*s
, int stride
)
359 int w
= s
->source
.width
;
360 int h
= s
->source
.height
;
362 av_assert0(stride
>= w
);
365 if (s
->buffer_stride
>= stride
)
367 s
->buffer_stride
= 0;
369 av_freep(&s
->edge_emu_buffer_base
);
370 memset(s
->edge_emu_buffer
, 0, sizeof(s
->edge_emu_buffer
));
372 av_freep(&s
->mcscratch
);
374 s
->edge_emu_buffer_base
= av_malloc_array(stride
, MAX_BLOCKSIZE
);
376 s
->mctmp
= av_malloc_array((stride
+MAX_BLOCKSIZE
), (h
+MAX_BLOCKSIZE
) * sizeof(*s
->mctmp
));
377 s
->mcscratch
= av_malloc_array(stride
, MAX_BLOCKSIZE
);
379 if (!s
->edge_emu_buffer_base
|| !s
->mctmp
|| !s
->mcscratch
)
380 return AVERROR(ENOMEM
);
382 s
->buffer_stride
= stride
;
386 static void free_sequence_buffers(DiracContext
*s
)
390 for (i
= 0; i
< MAX_FRAMES
; i
++) {
391 if (s
->all_frames
[i
].avframe
->data
[0]) {
392 av_frame_unref(s
->all_frames
[i
].avframe
);
393 memset(s
->all_frames
[i
].interpolated
, 0, sizeof(s
->all_frames
[i
].interpolated
));
396 for (j
= 0; j
< 3; j
++)
397 for (k
= 1; k
< 4; k
++)
398 av_freep(&s
->all_frames
[i
].hpel_base
[j
][k
]);
401 memset(s
->ref_frames
, 0, sizeof(s
->ref_frames
));
402 memset(s
->delay_frames
, 0, sizeof(s
->delay_frames
));
404 for (i
= 0; i
< 3; i
++) {
405 av_freep(&s
->plane
[i
].idwt_buf_base
);
406 av_freep(&s
->plane
[i
].idwt_tmp
);
409 s
->buffer_stride
= 0;
410 av_freep(&s
->sbsplit
);
411 av_freep(&s
->blmotion
);
412 av_freep(&s
->edge_emu_buffer_base
);
415 av_freep(&s
->mcscratch
);
418 static av_cold
int dirac_decode_init(AVCodecContext
*avctx
)
420 DiracContext
*s
= avctx
->priv_data
;
424 s
->frame_number
= -1;
426 ff_diracdsp_init(&s
->diracdsp
);
427 ff_mpegvideoencdsp_init(&s
->mpvencdsp
, avctx
);
428 ff_videodsp_init(&s
->vdsp
, 8);
430 for (i
= 0; i
< MAX_FRAMES
; i
++) {
431 s
->all_frames
[i
].avframe
= av_frame_alloc();
432 if (!s
->all_frames
[i
].avframe
) {
434 av_frame_free(&s
->all_frames
[--i
].avframe
);
435 return AVERROR(ENOMEM
);
442 static void dirac_decode_flush(AVCodecContext
*avctx
)
444 DiracContext
*s
= avctx
->priv_data
;
445 free_sequence_buffers(s
);
446 s
->seen_sequence_header
= 0;
447 s
->frame_number
= -1;
450 static av_cold
int dirac_decode_end(AVCodecContext
*avctx
)
452 DiracContext
*s
= avctx
->priv_data
;
455 dirac_decode_flush(avctx
);
456 for (i
= 0; i
< MAX_FRAMES
; i
++)
457 av_frame_free(&s
->all_frames
[i
].avframe
);
462 #define SIGN_CTX(x) (CTX_SIGN_ZERO + ((x) > 0) - ((x) < 0))
464 static inline void coeff_unpack_arith(DiracArith
*c
, int qfactor
, int qoffset
,
465 SubBand
*b
, IDWTELEM
*buf
, int x
, int y
)
469 int pred_ctx
= CTX_ZPZN_F1
;
471 /* Check if the parent subband has a 0 in the corresponding position */
473 pred_ctx
+= !!b
->parent
->ibuf
[b
->parent
->stride
* (y
>>1) + (x
>>1)] << 1;
475 if (b
->orientation
== subband_hl
)
476 sign_pred
= buf
[-b
->stride
];
478 /* Determine if the pixel has only zeros in its neighbourhood */
480 pred_ctx
+= !(buf
[-1] | buf
[-b
->stride
] | buf
[-1-b
->stride
]);
481 if (b
->orientation
== subband_lh
)
484 pred_ctx
+= !buf
[-b
->stride
];
487 coeff
= dirac_get_arith_uint(c
, pred_ctx
, CTX_COEFF_DATA
);
489 coeff
= (coeff
* qfactor
+ qoffset
+ 2) >> 2;
490 sign
= dirac_get_arith_bit(c
, SIGN_CTX(sign_pred
));
491 coeff
= (coeff
^ -sign
) + sign
;
496 static inline int coeff_unpack_golomb(GetBitContext
*gb
, int qfactor
, int qoffset
)
500 coeff
= svq3_get_ue_golomb(gb
);
502 coeff
= (coeff
* qfactor
+ qoffset
+ 2) >> 2;
503 sign
= get_bits1(gb
);
504 coeff
= (coeff
^ -sign
) + sign
;
510 * Decode the coeffs in the rectangle defined by left, right, top, bottom
511 * [DIRAC_STD] 13.4.3.2 Codeblock unpacking loop. codeblock()
513 static inline void codeblock(DiracContext
*s
, SubBand
*b
,
514 GetBitContext
*gb
, DiracArith
*c
,
515 int left
, int right
, int top
, int bottom
,
516 int blockcnt_one
, int is_arith
)
518 int x
, y
, zero_block
;
519 int qoffset
, qfactor
;
522 /* check for any coded coefficients in this codeblock */
525 zero_block
= dirac_get_arith_bit(c
, CTX_ZERO_BLOCK
);
527 zero_block
= get_bits1(gb
);
533 if (s
->codeblock_mode
&& !(s
->old_delta_quant
&& blockcnt_one
)) {
534 int quant
= b
->quant
;
536 quant
+= dirac_get_arith_int(c
, CTX_DELTA_Q_F
, CTX_DELTA_Q_DATA
);
538 quant
+= dirac_get_se_golomb(gb
);
540 av_log(s
->avctx
, AV_LOG_ERROR
, "Invalid quant\n");
546 b
->quant
= FFMIN(b
->quant
, MAX_QUANT
);
548 qfactor
= qscale_tab
[b
->quant
];
549 /* TODO: context pointer? */
551 qoffset
= qoffset_intra_tab
[b
->quant
];
553 qoffset
= qoffset_inter_tab
[b
->quant
];
555 buf
= b
->ibuf
+ top
* b
->stride
;
556 for (y
= top
; y
< bottom
; y
++) {
557 for (x
= left
; x
< right
; x
++) {
558 /* [DIRAC_STD] 13.4.4 Subband coefficients. coeff_unpack() */
560 coeff_unpack_arith(c
, qfactor
, qoffset
, b
, buf
+x
, x
, y
);
562 buf
[x
] = coeff_unpack_golomb(gb
, qfactor
, qoffset
);
569 * Dirac Specification ->
570 * 13.3 intra_dc_prediction(band)
572 static inline void intra_dc_prediction(SubBand
*b
)
574 IDWTELEM
*buf
= b
->ibuf
;
577 for (x
= 1; x
< b
->width
; x
++)
581 for (y
= 1; y
< b
->height
; y
++) {
582 buf
[0] += buf
[-b
->stride
];
584 for (x
= 1; x
< b
->width
; x
++) {
585 int pred
= buf
[x
- 1] + buf
[x
- b
->stride
] + buf
[x
- b
->stride
-1];
586 buf
[x
] += divide3(pred
);
593 * Dirac Specification ->
594 * 13.4.2 Non-skipped subbands. subband_coeffs()
596 static av_always_inline
void decode_subband_internal(DiracContext
*s
, SubBand
*b
, int is_arith
)
598 int cb_x
, cb_y
, left
, right
, top
, bottom
;
601 int cb_width
= s
->codeblock
[b
->level
+ (b
->orientation
!= subband_ll
)].width
;
602 int cb_height
= s
->codeblock
[b
->level
+ (b
->orientation
!= subband_ll
)].height
;
603 int blockcnt_one
= (cb_width
+ cb_height
) == 2;
608 init_get_bits8(&gb
, b
->coeff_data
, b
->length
);
611 ff_dirac_init_arith_decoder(&c
, &gb
, b
->length
);
614 for (cb_y
= 0; cb_y
< cb_height
; cb_y
++) {
615 bottom
= (b
->height
* (cb_y
+1LL)) / cb_height
;
617 for (cb_x
= 0; cb_x
< cb_width
; cb_x
++) {
618 right
= (b
->width
* (cb_x
+1LL)) / cb_width
;
619 codeblock(s
, b
, &gb
, &c
, left
, right
, top
, bottom
, blockcnt_one
, is_arith
);
625 if (b
->orientation
== subband_ll
&& s
->num_refs
== 0)
626 intra_dc_prediction(b
);
629 static int decode_subband_arith(AVCodecContext
*avctx
, void *b
)
631 DiracContext
*s
= avctx
->priv_data
;
632 decode_subband_internal(s
, b
, 1);
636 static int decode_subband_golomb(AVCodecContext
*avctx
, void *arg
)
638 DiracContext
*s
= avctx
->priv_data
;
640 decode_subband_internal(s
, *b
, 0);
645 * Dirac Specification ->
646 * [DIRAC_STD] 13.4.1 core_transform_data()
648 static void decode_component(DiracContext
*s
, int comp
)
650 AVCodecContext
*avctx
= s
->avctx
;
651 SubBand
*bands
[3*MAX_DWT_LEVELS
+1];
652 enum dirac_subband orientation
;
653 int level
, num_bands
= 0;
655 /* Unpack all subbands at all levels. */
656 for (level
= 0; level
< s
->wavelet_depth
; level
++) {
657 for (orientation
= !!level
; orientation
< 4; orientation
++) {
658 SubBand
*b
= &s
->plane
[comp
].band
[level
][orientation
];
659 bands
[num_bands
++] = b
;
661 align_get_bits(&s
->gb
);
662 /* [DIRAC_STD] 13.4.2 subband() */
663 b
->length
= svq3_get_ue_golomb(&s
->gb
);
665 b
->quant
= svq3_get_ue_golomb(&s
->gb
);
666 align_get_bits(&s
->gb
);
667 b
->coeff_data
= s
->gb
.buffer
+ get_bits_count(&s
->gb
)/8;
668 b
->length
= FFMIN(b
->length
, FFMAX(get_bits_left(&s
->gb
)/8, 0));
669 skip_bits_long(&s
->gb
, b
->length
*8);
672 /* arithmetic coding has inter-level dependencies, so we can only execute one level at a time */
674 avctx
->execute(avctx
, decode_subband_arith
, &s
->plane
[comp
].band
[level
][!!level
],
675 NULL
, 4-!!level
, sizeof(SubBand
));
677 /* golomb coding has no inter-level dependencies, so we can execute all subbands in parallel */
679 avctx
->execute(avctx
, decode_subband_golomb
, bands
, NULL
, num_bands
, sizeof(SubBand
*));
682 /* [DIRAC_STD] 13.5.5.2 Luma slice subband data. luma_slice_band(level,orient,sx,sy) --> if b2 == NULL */
683 /* [DIRAC_STD] 13.5.5.3 Chroma slice subband data. chroma_slice_band(level,orient,sx,sy) --> if b2 != NULL */
684 static void lowdelay_subband(DiracContext
*s
, GetBitContext
*gb
, int quant
,
685 int slice_x
, int slice_y
, int bits_end
,
686 SubBand
*b1
, SubBand
*b2
)
688 int left
= b1
->width
* slice_x
/ s
->lowdelay
.num_x
;
689 int right
= b1
->width
*(slice_x
+1) / s
->lowdelay
.num_x
;
690 int top
= b1
->height
* slice_y
/ s
->lowdelay
.num_y
;
691 int bottom
= b1
->height
*(slice_y
+1) / s
->lowdelay
.num_y
;
693 int qfactor
= qscale_tab
[FFMIN(quant
, MAX_QUANT
)];
694 int qoffset
= qoffset_intra_tab
[FFMIN(quant
, MAX_QUANT
)];
696 IDWTELEM
*buf1
= b1
->ibuf
+ top
* b1
->stride
;
697 IDWTELEM
*buf2
= b2
? b2
->ibuf
+ top
* b2
->stride
: NULL
;
699 /* we have to constantly check for overread since the spec explicitly
700 requires this, with the meaning that all remaining coeffs are set to 0 */
701 if (get_bits_count(gb
) >= bits_end
)
704 for (y
= top
; y
< bottom
; y
++) {
705 for (x
= left
; x
< right
; x
++) {
706 buf1
[x
] = coeff_unpack_golomb(gb
, qfactor
, qoffset
);
707 if (get_bits_count(gb
) >= bits_end
)
710 buf2
[x
] = coeff_unpack_golomb(gb
, qfactor
, qoffset
);
711 if (get_bits_count(gb
) >= bits_end
)
721 struct lowdelay_slice
{
730 * Dirac Specification ->
731 * 13.5.2 Slices. slice(sx,sy)
733 static int decode_lowdelay_slice(AVCodecContext
*avctx
, void *arg
)
735 DiracContext
*s
= avctx
->priv_data
;
736 struct lowdelay_slice
*slice
= arg
;
737 GetBitContext
*gb
= &slice
->gb
;
738 enum dirac_subband orientation
;
739 int level
, quant
, chroma_bits
, chroma_end
;
741 int quant_base
= get_bits(gb
, 7); /*[DIRAC_STD] qindex */
742 int length_bits
= av_log2(8 * slice
->bytes
)+1;
743 int luma_bits
= get_bits_long(gb
, length_bits
);
744 int luma_end
= get_bits_count(gb
) + FFMIN(luma_bits
, get_bits_left(gb
));
746 /* [DIRAC_STD] 13.5.5.2 luma_slice_band */
747 for (level
= 0; level
< s
->wavelet_depth
; level
++)
748 for (orientation
= !!level
; orientation
< 4; orientation
++) {
749 quant
= FFMAX(quant_base
- s
->lowdelay
.quant
[level
][orientation
], 0);
750 lowdelay_subband(s
, gb
, quant
, slice
->slice_x
, slice
->slice_y
, luma_end
,
751 &s
->plane
[0].band
[level
][orientation
], NULL
);
754 /* consume any unused bits from luma */
755 skip_bits_long(gb
, get_bits_count(gb
) - luma_end
);
757 chroma_bits
= 8*slice
->bytes
- 7 - length_bits
- luma_bits
;
758 chroma_end
= get_bits_count(gb
) + FFMIN(chroma_bits
, get_bits_left(gb
));
759 /* [DIRAC_STD] 13.5.5.3 chroma_slice_band */
760 for (level
= 0; level
< s
->wavelet_depth
; level
++)
761 for (orientation
= !!level
; orientation
< 4; orientation
++) {
762 quant
= FFMAX(quant_base
- s
->lowdelay
.quant
[level
][orientation
], 0);
763 lowdelay_subband(s
, gb
, quant
, slice
->slice_x
, slice
->slice_y
, chroma_end
,
764 &s
->plane
[1].band
[level
][orientation
],
765 &s
->plane
[2].band
[level
][orientation
]);
772 * Dirac Specification ->
773 * 13.5.1 low_delay_transform_data()
775 static void decode_lowdelay(DiracContext
*s
)
777 AVCodecContext
*avctx
= s
->avctx
;
778 int slice_x
, slice_y
, bytes
, bufsize
;
780 struct lowdelay_slice
*slices
;
783 slices
= av_mallocz_array(s
->lowdelay
.num_x
, s
->lowdelay
.num_y
* sizeof(struct lowdelay_slice
));
785 align_get_bits(&s
->gb
);
786 /*[DIRAC_STD] 13.5.2 Slices. slice(sx,sy) */
787 buf
= s
->gb
.buffer
+ get_bits_count(&s
->gb
)/8;
788 bufsize
= get_bits_left(&s
->gb
);
790 for (slice_y
= 0; bufsize
> 0 && slice_y
< s
->lowdelay
.num_y
; slice_y
++)
791 for (slice_x
= 0; bufsize
> 0 && slice_x
< s
->lowdelay
.num_x
; slice_x
++) {
792 bytes
= (slice_num
+1) * s
->lowdelay
.bytes
.num
/ s
->lowdelay
.bytes
.den
793 - slice_num
* s
->lowdelay
.bytes
.num
/ s
->lowdelay
.bytes
.den
;
795 slices
[slice_num
].bytes
= bytes
;
796 slices
[slice_num
].slice_x
= slice_x
;
797 slices
[slice_num
].slice_y
= slice_y
;
798 init_get_bits(&slices
[slice_num
].gb
, buf
, bufsize
);
805 avctx
->execute(avctx
, decode_lowdelay_slice
, slices
, NULL
, slice_num
,
806 sizeof(struct lowdelay_slice
)); /* [DIRAC_STD] 13.5.2 Slices */
807 intra_dc_prediction(&s
->plane
[0].band
[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
808 intra_dc_prediction(&s
->plane
[1].band
[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
809 intra_dc_prediction(&s
->plane
[2].band
[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
813 static void init_planes(DiracContext
*s
)
815 int i
, w
, h
, level
, orientation
;
817 for (i
= 0; i
< 3; i
++) {
818 Plane
*p
= &s
->plane
[i
];
820 p
->width
= s
->source
.width
>> (i
? s
->chroma_x_shift
: 0);
821 p
->height
= s
->source
.height
>> (i
? s
->chroma_y_shift
: 0);
822 p
->idwt_width
= w
= CALC_PADDING(p
->width
, s
->wavelet_depth
);
823 p
->idwt_height
= h
= CALC_PADDING(p
->height
, s
->wavelet_depth
);
824 p
->idwt_stride
= FFALIGN(p
->idwt_width
, 8);
826 for (level
= s
->wavelet_depth
-1; level
>= 0; level
--) {
829 for (orientation
= !!level
; orientation
< 4; orientation
++) {
830 SubBand
*b
= &p
->band
[level
][orientation
];
832 b
->ibuf
= p
->idwt_buf
;
834 b
->stride
= p
->idwt_stride
<< (s
->wavelet_depth
- level
);
837 b
->orientation
= orientation
;
842 b
->ibuf
+= b
->stride
>>1;
845 b
->parent
= &p
->band
[level
-1][orientation
];
850 p
->xblen
= s
->plane
[0].xblen
>> s
->chroma_x_shift
;
851 p
->yblen
= s
->plane
[0].yblen
>> s
->chroma_y_shift
;
852 p
->xbsep
= s
->plane
[0].xbsep
>> s
->chroma_x_shift
;
853 p
->ybsep
= s
->plane
[0].ybsep
>> s
->chroma_y_shift
;
856 p
->xoffset
= (p
->xblen
- p
->xbsep
)/2;
857 p
->yoffset
= (p
->yblen
- p
->ybsep
)/2;
862 * Unpack the motion compensation parameters
863 * Dirac Specification ->
864 * 11.2 Picture prediction data. picture_prediction()
866 static int dirac_unpack_prediction_parameters(DiracContext
*s
)
868 static const uint8_t default_blen
[] = { 4, 12, 16, 24 };
869 static const uint8_t default_bsep
[] = { 4, 8, 12, 16 };
871 GetBitContext
*gb
= &s
->gb
;
875 /* [DIRAC_STD] 11.2.2 Block parameters. block_parameters() */
876 /* Luma and Chroma are equal. 11.2.3 */
877 idx
= svq3_get_ue_golomb(gb
); /* [DIRAC_STD] index */
880 av_log(s
->avctx
, AV_LOG_ERROR
, "Block prediction index too high\n");
885 s
->plane
[0].xblen
= svq3_get_ue_golomb(gb
);
886 s
->plane
[0].yblen
= svq3_get_ue_golomb(gb
);
887 s
->plane
[0].xbsep
= svq3_get_ue_golomb(gb
);
888 s
->plane
[0].ybsep
= svq3_get_ue_golomb(gb
);
890 /*[DIRAC_STD] preset_block_params(index). Table 11.1 */
891 s
->plane
[0].xblen
= default_blen
[idx
-1];
892 s
->plane
[0].yblen
= default_blen
[idx
-1];
893 s
->plane
[0].xbsep
= default_bsep
[idx
-1];
894 s
->plane
[0].ybsep
= default_bsep
[idx
-1];
896 /*[DIRAC_STD] 11.2.4 motion_data_dimensions()
897 Calculated in function dirac_unpack_block_motion_data */
899 if (!s
->plane
[0].xbsep
|| !s
->plane
[0].ybsep
|| s
->plane
[0].xbsep
< s
->plane
[0].xblen
/2 || s
->plane
[0].ybsep
< s
->plane
[0].yblen
/2) {
900 av_log(s
->avctx
, AV_LOG_ERROR
, "Block separation too small\n");
903 if (s
->plane
[0].xbsep
> s
->plane
[0].xblen
|| s
->plane
[0].ybsep
> s
->plane
[0].yblen
) {
904 av_log(s
->avctx
, AV_LOG_ERROR
, "Block separation greater than size\n");
907 if (FFMAX(s
->plane
[0].xblen
, s
->plane
[0].yblen
) > MAX_BLOCKSIZE
) {
908 av_log(s
->avctx
, AV_LOG_ERROR
, "Unsupported large block size\n");
912 /*[DIRAC_STD] 11.2.5 Motion vector precision. motion_vector_precision()
913 Read motion vector precision */
914 s
->mv_precision
= svq3_get_ue_golomb(gb
);
915 if (s
->mv_precision
> 3) {
916 av_log(s
->avctx
, AV_LOG_ERROR
, "MV precision finer than eighth-pel\n");
920 /*[DIRAC_STD] 11.2.6 Global motion. global_motion()
921 Read the global motion compensation parameters */
922 s
->globalmc_flag
= get_bits1(gb
);
923 if (s
->globalmc_flag
) {
924 memset(s
->globalmc
, 0, sizeof(s
->globalmc
));
925 /* [DIRAC_STD] pan_tilt(gparams) */
926 for (ref
= 0; ref
< s
->num_refs
; ref
++) {
928 s
->globalmc
[ref
].pan_tilt
[0] = dirac_get_se_golomb(gb
);
929 s
->globalmc
[ref
].pan_tilt
[1] = dirac_get_se_golomb(gb
);
931 /* [DIRAC_STD] zoom_rotate_shear(gparams)
932 zoom/rotation/shear parameters */
934 s
->globalmc
[ref
].zrs_exp
= svq3_get_ue_golomb(gb
);
935 s
->globalmc
[ref
].zrs
[0][0] = dirac_get_se_golomb(gb
);
936 s
->globalmc
[ref
].zrs
[0][1] = dirac_get_se_golomb(gb
);
937 s
->globalmc
[ref
].zrs
[1][0] = dirac_get_se_golomb(gb
);
938 s
->globalmc
[ref
].zrs
[1][1] = dirac_get_se_golomb(gb
);
940 s
->globalmc
[ref
].zrs
[0][0] = 1;
941 s
->globalmc
[ref
].zrs
[1][1] = 1;
943 /* [DIRAC_STD] perspective(gparams) */
945 s
->globalmc
[ref
].perspective_exp
= svq3_get_ue_golomb(gb
);
946 s
->globalmc
[ref
].perspective
[0] = dirac_get_se_golomb(gb
);
947 s
->globalmc
[ref
].perspective
[1] = dirac_get_se_golomb(gb
);
952 /*[DIRAC_STD] 11.2.7 Picture prediction mode. prediction_mode()
953 Picture prediction mode, not currently used. */
954 if (svq3_get_ue_golomb(gb
)) {
955 av_log(s
->avctx
, AV_LOG_ERROR
, "Unknown picture prediction mode\n");
959 /* [DIRAC_STD] 11.2.8 Reference picture weight. reference_picture_weights()
960 just data read, weight calculation will be done later on. */
961 s
->weight_log2denom
= 1;
966 s
->weight_log2denom
= svq3_get_ue_golomb(gb
);
967 s
->weight
[0] = dirac_get_se_golomb(gb
);
968 if (s
->num_refs
== 2)
969 s
->weight
[1] = dirac_get_se_golomb(gb
);
975 * Dirac Specification ->
976 * 11.3 Wavelet transform data. wavelet_transform()
978 static int dirac_unpack_idwt_params(DiracContext
*s
)
980 GetBitContext
*gb
= &s
->gb
;
984 #define CHECKEDREAD(dst, cond, errmsg) \
985 tmp = svq3_get_ue_golomb(gb); \
987 av_log(s->avctx, AV_LOG_ERROR, errmsg); \
994 s
->zero_res
= s
->num_refs
? get_bits1(gb
) : 0;
998 /*[DIRAC_STD] 11.3.1 Transform parameters. transform_parameters() */
999 CHECKEDREAD(s
->wavelet_idx
, tmp
> 6, "wavelet_idx is too big\n")
1001 CHECKEDREAD(s
->wavelet_depth
, tmp
> MAX_DWT_LEVELS
|| tmp
< 1, "invalid number of DWT decompositions\n")
1003 if (!s
->low_delay
) {
1004 /* Codeblock parameters (core syntax only) */
1005 if (get_bits1(gb
)) {
1006 for (i
= 0; i
<= s
->wavelet_depth
; i
++) {
1007 CHECKEDREAD(s
->codeblock
[i
].width
, tmp
< 1 || tmp
> (s
->avctx
->width
>>s
->wavelet_depth
-i
), "codeblock width invalid\n")
1008 CHECKEDREAD(s
->codeblock
[i
].height
, tmp
< 1 || tmp
> (s
->avctx
->height
>>s
->wavelet_depth
-i
), "codeblock height invalid\n")
1011 CHECKEDREAD(s
->codeblock_mode
, tmp
> 1, "unknown codeblock mode\n")
1013 for (i
= 0; i
<= s
->wavelet_depth
; i
++)
1014 s
->codeblock
[i
].width
= s
->codeblock
[i
].height
= 1;
1016 /* Slice parameters + quantization matrix*/
1017 /*[DIRAC_STD] 11.3.4 Slice coding Parameters (low delay syntax only). slice_parameters() */
1018 s
->lowdelay
.num_x
= svq3_get_ue_golomb(gb
);
1019 s
->lowdelay
.num_y
= svq3_get_ue_golomb(gb
);
1020 s
->lowdelay
.bytes
.num
= svq3_get_ue_golomb(gb
);
1021 s
->lowdelay
.bytes
.den
= svq3_get_ue_golomb(gb
);
1023 if (s
->lowdelay
.bytes
.den
<= 0) {
1024 av_log(s
->avctx
,AV_LOG_ERROR
,"Invalid lowdelay.bytes.den\n");
1025 return AVERROR_INVALIDDATA
;
1028 /* [DIRAC_STD] 11.3.5 Quantisation matrices (low-delay syntax). quant_matrix() */
1029 if (get_bits1(gb
)) {
1030 av_log(s
->avctx
,AV_LOG_DEBUG
,"Low Delay: Has Custom Quantization Matrix!\n");
1031 /* custom quantization matrix */
1032 s
->lowdelay
.quant
[0][0] = svq3_get_ue_golomb(gb
);
1033 for (level
= 0; level
< s
->wavelet_depth
; level
++) {
1034 s
->lowdelay
.quant
[level
][1] = svq3_get_ue_golomb(gb
);
1035 s
->lowdelay
.quant
[level
][2] = svq3_get_ue_golomb(gb
);
1036 s
->lowdelay
.quant
[level
][3] = svq3_get_ue_golomb(gb
);
1039 if (s
->wavelet_depth
> 4) {
1040 av_log(s
->avctx
,AV_LOG_ERROR
,"Mandatory custom low delay matrix missing for depth %d\n", s
->wavelet_depth
);
1041 return AVERROR_INVALIDDATA
;
1043 /* default quantization matrix */
1044 for (level
= 0; level
< s
->wavelet_depth
; level
++)
1045 for (i
= 0; i
< 4; i
++) {
1046 s
->lowdelay
.quant
[level
][i
] = default_qmat
[s
->wavelet_idx
][level
][i
];
1047 /* haar with no shift differs for different depths */
1048 if (s
->wavelet_idx
== 3)
1049 s
->lowdelay
.quant
[level
][i
] += 4*(s
->wavelet_depth
-1 - level
);
1056 static inline int pred_sbsplit(uint8_t *sbsplit
, int stride
, int x
, int y
)
1058 static const uint8_t avgsplit
[7] = { 0, 0, 1, 1, 1, 2, 2 };
1065 return sbsplit
[-stride
];
1067 return avgsplit
[sbsplit
[-1] + sbsplit
[-stride
] + sbsplit
[-stride
-1]];
1070 static inline int pred_block_mode(DiracBlock
*block
, int stride
, int x
, int y
, int refmask
)
1077 return block
[-1].ref
& refmask
;
1079 return block
[-stride
].ref
& refmask
;
1081 /* return the majority */
1082 pred
= (block
[-1].ref
& refmask
) + (block
[-stride
].ref
& refmask
) + (block
[-stride
-1].ref
& refmask
);
1083 return (pred
>> 1) & refmask
;
1086 static inline void pred_block_dc(DiracBlock
*block
, int stride
, int x
, int y
)
1090 memset(block
->u
.dc
, 0, sizeof(block
->u
.dc
));
1092 if (x
&& !(block
[-1].ref
& 3)) {
1093 for (i
= 0; i
< 3; i
++)
1094 block
->u
.dc
[i
] += block
[-1].u
.dc
[i
];
1098 if (y
&& !(block
[-stride
].ref
& 3)) {
1099 for (i
= 0; i
< 3; i
++)
1100 block
->u
.dc
[i
] += block
[-stride
].u
.dc
[i
];
1104 if (x
&& y
&& !(block
[-1-stride
].ref
& 3)) {
1105 for (i
= 0; i
< 3; i
++)
1106 block
->u
.dc
[i
] += block
[-1-stride
].u
.dc
[i
];
1111 for (i
= 0; i
< 3; i
++)
1112 block
->u
.dc
[i
] = (block
->u
.dc
[i
]+1)>>1;
1113 } else if (n
== 3) {
1114 for (i
= 0; i
< 3; i
++)
1115 block
->u
.dc
[i
] = divide3(block
->u
.dc
[i
]);
1119 static inline void pred_mv(DiracBlock
*block
, int stride
, int x
, int y
, int ref
)
1122 int refmask
= ref
+1;
1123 int mask
= refmask
| DIRAC_REF_MASK_GLOBAL
; /* exclude gmc blocks */
1126 if (x
&& (block
[-1].ref
& mask
) == refmask
)
1127 pred
[n
++] = block
[-1].u
.mv
[ref
];
1129 if (y
&& (block
[-stride
].ref
& mask
) == refmask
)
1130 pred
[n
++] = block
[-stride
].u
.mv
[ref
];
1132 if (x
&& y
&& (block
[-stride
-1].ref
& mask
) == refmask
)
1133 pred
[n
++] = block
[-stride
-1].u
.mv
[ref
];
1137 block
->u
.mv
[ref
][0] = 0;
1138 block
->u
.mv
[ref
][1] = 0;
1141 block
->u
.mv
[ref
][0] = pred
[0][0];
1142 block
->u
.mv
[ref
][1] = pred
[0][1];
1145 block
->u
.mv
[ref
][0] = (pred
[0][0] + pred
[1][0] + 1) >> 1;
1146 block
->u
.mv
[ref
][1] = (pred
[0][1] + pred
[1][1] + 1) >> 1;
1149 block
->u
.mv
[ref
][0] = mid_pred(pred
[0][0], pred
[1][0], pred
[2][0]);
1150 block
->u
.mv
[ref
][1] = mid_pred(pred
[0][1], pred
[1][1], pred
[2][1]);
1155 static void global_mv(DiracContext
*s
, DiracBlock
*block
, int x
, int y
, int ref
)
1157 int ez
= s
->globalmc
[ref
].zrs_exp
;
1158 int ep
= s
->globalmc
[ref
].perspective_exp
;
1159 int (*A
)[2] = s
->globalmc
[ref
].zrs
;
1160 int *b
= s
->globalmc
[ref
].pan_tilt
;
1161 int *c
= s
->globalmc
[ref
].perspective
;
1163 int m
= (1<<ep
) - (c
[0]*x
+ c
[1]*y
);
1164 int mx
= m
* ((A
[0][0] * x
+ A
[0][1]*y
) + (1<<ez
) * b
[0]);
1165 int my
= m
* ((A
[1][0] * x
+ A
[1][1]*y
) + (1<<ez
) * b
[1]);
1167 block
->u
.mv
[ref
][0] = (mx
+ (1<<(ez
+ep
))) >> (ez
+ep
);
1168 block
->u
.mv
[ref
][1] = (my
+ (1<<(ez
+ep
))) >> (ez
+ep
);
1171 static void decode_block_params(DiracContext
*s
, DiracArith arith
[8], DiracBlock
*block
,
1172 int stride
, int x
, int y
)
1176 block
->ref
= pred_block_mode(block
, stride
, x
, y
, DIRAC_REF_MASK_REF1
);
1177 block
->ref
^= dirac_get_arith_bit(arith
, CTX_PMODE_REF1
);
1179 if (s
->num_refs
== 2) {
1180 block
->ref
|= pred_block_mode(block
, stride
, x
, y
, DIRAC_REF_MASK_REF2
);
1181 block
->ref
^= dirac_get_arith_bit(arith
, CTX_PMODE_REF2
) << 1;
1185 pred_block_dc(block
, stride
, x
, y
);
1186 for (i
= 0; i
< 3; i
++)
1187 block
->u
.dc
[i
] += dirac_get_arith_int(arith
+1+i
, CTX_DC_F1
, CTX_DC_DATA
);
1191 if (s
->globalmc_flag
) {
1192 block
->ref
|= pred_block_mode(block
, stride
, x
, y
, DIRAC_REF_MASK_GLOBAL
);
1193 block
->ref
^= dirac_get_arith_bit(arith
, CTX_GLOBAL_BLOCK
) << 2;
1196 for (i
= 0; i
< s
->num_refs
; i
++)
1197 if (block
->ref
& (i
+1)) {
1198 if (block
->ref
& DIRAC_REF_MASK_GLOBAL
) {
1199 global_mv(s
, block
, x
, y
, i
);
1201 pred_mv(block
, stride
, x
, y
, i
);
1202 block
->u
.mv
[i
][0] += dirac_get_arith_int(arith
+ 4 + 2 * i
, CTX_MV_F1
, CTX_MV_DATA
);
1203 block
->u
.mv
[i
][1] += dirac_get_arith_int(arith
+ 5 + 2 * i
, CTX_MV_F1
, CTX_MV_DATA
);
1209 * Copies the current block to the other blocks covered by the current superblock split mode
1211 static void propagate_block_data(DiracBlock
*block
, int stride
, int size
)
1214 DiracBlock
*dst
= block
;
1216 for (x
= 1; x
< size
; x
++)
1219 for (y
= 1; y
< size
; y
++) {
1221 for (x
= 0; x
< size
; x
++)
1227 * Dirac Specification ->
1228 * 12. Block motion data syntax
1230 static int dirac_unpack_block_motion_data(DiracContext
*s
)
1232 GetBitContext
*gb
= &s
->gb
;
1233 uint8_t *sbsplit
= s
->sbsplit
;
1235 DiracArith arith
[8];
1239 /* [DIRAC_STD] 11.2.4 and 12.2.1 Number of blocks and superblocks */
1240 s
->sbwidth
= DIVRNDUP(s
->source
.width
, 4*s
->plane
[0].xbsep
);
1241 s
->sbheight
= DIVRNDUP(s
->source
.height
, 4*s
->plane
[0].ybsep
);
1242 s
->blwidth
= 4 * s
->sbwidth
;
1243 s
->blheight
= 4 * s
->sbheight
;
1245 /* [DIRAC_STD] 12.3.1 Superblock splitting modes. superblock_split_modes()
1246 decode superblock split modes */
1247 ff_dirac_init_arith_decoder(arith
, gb
, svq3_get_ue_golomb(gb
)); /* svq3_get_ue_golomb(gb) is the length */
1248 for (y
= 0; y
< s
->sbheight
; y
++) {
1249 for (x
= 0; x
< s
->sbwidth
; x
++) {
1250 unsigned int split
= dirac_get_arith_uint(arith
, CTX_SB_F1
, CTX_SB_DATA
);
1253 sbsplit
[x
] = (split
+ pred_sbsplit(sbsplit
+x
, s
->sbwidth
, x
, y
)) % 3;
1255 sbsplit
+= s
->sbwidth
;
1258 /* setup arith decoding */
1259 ff_dirac_init_arith_decoder(arith
, gb
, svq3_get_ue_golomb(gb
));
1260 for (i
= 0; i
< s
->num_refs
; i
++) {
1261 ff_dirac_init_arith_decoder(arith
+ 4 + 2 * i
, gb
, svq3_get_ue_golomb(gb
));
1262 ff_dirac_init_arith_decoder(arith
+ 5 + 2 * i
, gb
, svq3_get_ue_golomb(gb
));
1264 for (i
= 0; i
< 3; i
++)
1265 ff_dirac_init_arith_decoder(arith
+1+i
, gb
, svq3_get_ue_golomb(gb
));
1267 for (y
= 0; y
< s
->sbheight
; y
++)
1268 for (x
= 0; x
< s
->sbwidth
; x
++) {
1269 int blkcnt
= 1 << s
->sbsplit
[y
* s
->sbwidth
+ x
];
1270 int step
= 4 >> s
->sbsplit
[y
* s
->sbwidth
+ x
];
1272 for (q
= 0; q
< blkcnt
; q
++)
1273 for (p
= 0; p
< blkcnt
; p
++) {
1274 int bx
= 4 * x
+ p
*step
;
1275 int by
= 4 * y
+ q
*step
;
1276 DiracBlock
*block
= &s
->blmotion
[by
*s
->blwidth
+ bx
];
1277 decode_block_params(s
, arith
, block
, s
->blwidth
, bx
, by
);
1278 propagate_block_data(block
, s
->blwidth
, step
);
1285 static int weight(int i
, int blen
, int offset
)
1287 #define ROLLOFF(i) offset == 1 ? ((i) ? 5 : 3) : \
1288 (1 + (6*(i) + offset - 1) / (2*offset - 1))
1292 else if (i
> blen
-1 - 2*offset
)
1293 return ROLLOFF(blen
-1 - i
);
1297 static void init_obmc_weight_row(Plane
*p
, uint8_t *obmc_weight
, int stride
,
1298 int left
, int right
, int wy
)
1301 for (x
= 0; left
&& x
< p
->xblen
>> 1; x
++)
1302 obmc_weight
[x
] = wy
*8;
1303 for (; x
< p
->xblen
>> right
; x
++)
1304 obmc_weight
[x
] = wy
*weight(x
, p
->xblen
, p
->xoffset
);
1305 for (; x
< p
->xblen
; x
++)
1306 obmc_weight
[x
] = wy
*8;
1307 for (; x
< stride
; x
++)
1311 static void init_obmc_weight(Plane
*p
, uint8_t *obmc_weight
, int stride
,
1312 int left
, int right
, int top
, int bottom
)
1315 for (y
= 0; top
&& y
< p
->yblen
>> 1; y
++) {
1316 init_obmc_weight_row(p
, obmc_weight
, stride
, left
, right
, 8);
1317 obmc_weight
+= stride
;
1319 for (; y
< p
->yblen
>> bottom
; y
++) {
1320 int wy
= weight(y
, p
->yblen
, p
->yoffset
);
1321 init_obmc_weight_row(p
, obmc_weight
, stride
, left
, right
, wy
);
1322 obmc_weight
+= stride
;
1324 for (; y
< p
->yblen
; y
++) {
1325 init_obmc_weight_row(p
, obmc_weight
, stride
, left
, right
, 8);
1326 obmc_weight
+= stride
;
1330 static void init_obmc_weights(DiracContext
*s
, Plane
*p
, int by
)
1333 int bottom
= by
== s
->blheight
-1;
1335 /* don't bother re-initing for rows 2 to blheight-2, the weights don't change */
1336 if (top
|| bottom
|| by
== 1) {
1337 init_obmc_weight(p
, s
->obmc_weight
[0], MAX_BLOCKSIZE
, 1, 0, top
, bottom
);
1338 init_obmc_weight(p
, s
->obmc_weight
[1], MAX_BLOCKSIZE
, 0, 0, top
, bottom
);
1339 init_obmc_weight(p
, s
->obmc_weight
[2], MAX_BLOCKSIZE
, 0, 1, top
, bottom
);
1343 static const uint8_t epel_weights
[4][4][4] = {
1363 * For block x,y, determine which of the hpel planes to do bilinear
1364 * interpolation from and set src[] to the location in each hpel plane
1367 * @return the index of the put_dirac_pixels_tab function to use
1368 * 0 for 1 plane (fpel,hpel), 1 for 2 planes (qpel), 2 for 4 planes (qpel), and 3 for epel
1370 static int mc_subpel(DiracContext
*s
, DiracBlock
*block
, const uint8_t *src
[5],
1371 int x
, int y
, int ref
, int plane
)
1373 Plane
*p
= &s
->plane
[plane
];
1374 uint8_t **ref_hpel
= s
->ref_pics
[ref
]->hpel
[plane
];
1375 int motion_x
= block
->u
.mv
[ref
][0];
1376 int motion_y
= block
->u
.mv
[ref
][1];
1377 int mx
, my
, i
, epel
, nplanes
= 0;
1380 motion_x
>>= s
->chroma_x_shift
;
1381 motion_y
>>= s
->chroma_y_shift
;
1384 mx
= motion_x
& ~(-1U << s
->mv_precision
);
1385 my
= motion_y
& ~(-1U << s
->mv_precision
);
1386 motion_x
>>= s
->mv_precision
;
1387 motion_y
>>= s
->mv_precision
;
1388 /* normalize subpel coordinates to epel */
1389 /* TODO: template this function? */
1390 mx
<<= 3 - s
->mv_precision
;
1391 my
<<= 3 - s
->mv_precision
;
1400 src
[0] = ref_hpel
[(my
>>1)+(mx
>>2)] + y
*p
->stride
+ x
;
1404 for (i
= 0; i
< 4; i
++)
1405 src
[i
] = ref_hpel
[i
] + y
*p
->stride
+ x
;
1407 /* if we're interpolating in the right/bottom halves, adjust the planes as needed
1408 we increment x/y because the edge changes for half of the pixels */
1415 src
[0] += p
->stride
;
1416 src
[1] += p
->stride
;
1424 /* check if we really only need 2 planes since either mx or my is
1425 a hpel position. (epel weights of 0 handle this there) */
1427 /* mx == 0: average [0] and [2]
1428 mx == 4: average [1] and [3] */
1429 src
[!mx
] = src
[2 + !!mx
];
1431 } else if (!(my
&3)) {
1432 src
[0] = src
[(my
>>1) ];
1433 src
[1] = src
[(my
>>1)+1];
1437 /* adjust the ordering if needed so the weights work */
1439 FFSWAP(const uint8_t *, src
[0], src
[1]);
1440 FFSWAP(const uint8_t *, src
[2], src
[3]);
1443 FFSWAP(const uint8_t *, src
[0], src
[2]);
1444 FFSWAP(const uint8_t *, src
[1], src
[3]);
1446 src
[4] = epel_weights
[my
&3][mx
&3];
1450 /* fixme: v/h _edge_pos */
1451 if (x
+ p
->xblen
> p
->width
+EDGE_WIDTH
/2 ||
1452 y
+ p
->yblen
> p
->height
+EDGE_WIDTH
/2 ||
1454 for (i
= 0; i
< nplanes
; i
++) {
1455 s
->vdsp
.emulated_edge_mc(s
->edge_emu_buffer
[i
], src
[i
],
1456 p
->stride
, p
->stride
,
1457 p
->xblen
, p
->yblen
, x
, y
,
1458 p
->width
+EDGE_WIDTH
/2, p
->height
+EDGE_WIDTH
/2);
1459 src
[i
] = s
->edge_emu_buffer
[i
];
1462 return (nplanes
>>1) + epel
;
1465 static void add_dc(uint16_t *dst
, int dc
, int stride
,
1466 uint8_t *obmc_weight
, int xblen
, int yblen
)
1471 for (y
= 0; y
< yblen
; y
++) {
1472 for (x
= 0; x
< xblen
; x
+= 2) {
1473 dst
[x
] += dc
* obmc_weight
[x
];
1474 dst
[x
+1] += dc
* obmc_weight
[x
+1];
1477 obmc_weight
+= MAX_BLOCKSIZE
;
1481 static void block_mc(DiracContext
*s
, DiracBlock
*block
,
1482 uint16_t *mctmp
, uint8_t *obmc_weight
,
1483 int plane
, int dstx
, int dsty
)
1485 Plane
*p
= &s
->plane
[plane
];
1486 const uint8_t *src
[5];
1489 switch (block
->ref
&3) {
1491 add_dc(mctmp
, block
->u
.dc
[plane
], p
->stride
, obmc_weight
, p
->xblen
, p
->yblen
);
1495 idx
= mc_subpel(s
, block
, src
, dstx
, dsty
, (block
->ref
&3)-1, plane
);
1496 s
->put_pixels_tab
[idx
](s
->mcscratch
, src
, p
->stride
, p
->yblen
);
1498 s
->weight_func(s
->mcscratch
, p
->stride
, s
->weight_log2denom
,
1499 s
->weight
[0] + s
->weight
[1], p
->yblen
);
1502 idx
= mc_subpel(s
, block
, src
, dstx
, dsty
, 0, plane
);
1503 s
->put_pixels_tab
[idx
](s
->mcscratch
, src
, p
->stride
, p
->yblen
);
1504 idx
= mc_subpel(s
, block
, src
, dstx
, dsty
, 1, plane
);
1505 if (s
->biweight_func
) {
1506 /* fixme: +32 is a quick hack */
1507 s
->put_pixels_tab
[idx
](s
->mcscratch
+ 32, src
, p
->stride
, p
->yblen
);
1508 s
->biweight_func(s
->mcscratch
, s
->mcscratch
+32, p
->stride
, s
->weight_log2denom
,
1509 s
->weight
[0], s
->weight
[1], p
->yblen
);
1511 s
->avg_pixels_tab
[idx
](s
->mcscratch
, src
, p
->stride
, p
->yblen
);
1514 s
->add_obmc(mctmp
, s
->mcscratch
, p
->stride
, obmc_weight
, p
->yblen
);
1517 static void mc_row(DiracContext
*s
, DiracBlock
*block
, uint16_t *mctmp
, int plane
, int dsty
)
1519 Plane
*p
= &s
->plane
[plane
];
1520 int x
, dstx
= p
->xbsep
- p
->xoffset
;
1522 block_mc(s
, block
, mctmp
, s
->obmc_weight
[0], plane
, -p
->xoffset
, dsty
);
1525 for (x
= 1; x
< s
->blwidth
-1; x
++) {
1526 block_mc(s
, block
+x
, mctmp
, s
->obmc_weight
[1], plane
, dstx
, dsty
);
1530 block_mc(s
, block
+x
, mctmp
, s
->obmc_weight
[2], plane
, dstx
, dsty
);
1533 static void select_dsp_funcs(DiracContext
*s
, int width
, int height
, int xblen
, int yblen
)
1541 memcpy(s
->put_pixels_tab
, s
->diracdsp
.put_dirac_pixels_tab
[idx
], sizeof(s
->put_pixels_tab
));
1542 memcpy(s
->avg_pixels_tab
, s
->diracdsp
.avg_dirac_pixels_tab
[idx
], sizeof(s
->avg_pixels_tab
));
1543 s
->add_obmc
= s
->diracdsp
.add_dirac_obmc
[idx
];
1544 if (s
->weight_log2denom
> 1 || s
->weight
[0] != 1 || s
->weight
[1] != 1) {
1545 s
->weight_func
= s
->diracdsp
.weight_dirac_pixels_tab
[idx
];
1546 s
->biweight_func
= s
->diracdsp
.biweight_dirac_pixels_tab
[idx
];
1548 s
->weight_func
= NULL
;
1549 s
->biweight_func
= NULL
;
1553 static void interpolate_refplane(DiracContext
*s
, DiracFrame
*ref
, int plane
, int width
, int height
)
1555 /* chroma allocates an edge of 8 when subsampled
1556 which for 4:2:2 means an h edge of 16 and v edge of 8
1557 just use 8 for everything for the moment */
1558 int i
, edge
= EDGE_WIDTH
/2;
1560 ref
->hpel
[plane
][0] = ref
->avframe
->data
[plane
];
1561 s
->mpvencdsp
.draw_edges(ref
->hpel
[plane
][0], ref
->avframe
->linesize
[plane
], width
, height
, edge
, edge
, EDGE_TOP
| EDGE_BOTTOM
); /* EDGE_TOP | EDGE_BOTTOM values just copied to make it build, this needs to be ensured */
1563 /* no need for hpel if we only have fpel vectors */
1564 if (!s
->mv_precision
)
1567 for (i
= 1; i
< 4; i
++) {
1568 if (!ref
->hpel_base
[plane
][i
])
1569 ref
->hpel_base
[plane
][i
] = av_malloc((height
+2*edge
) * ref
->avframe
->linesize
[plane
] + 32);
1570 /* we need to be 16-byte aligned even for chroma */
1571 ref
->hpel
[plane
][i
] = ref
->hpel_base
[plane
][i
] + edge
*ref
->avframe
->linesize
[plane
] + 16;
1574 if (!ref
->interpolated
[plane
]) {
1575 s
->diracdsp
.dirac_hpel_filter(ref
->hpel
[plane
][1], ref
->hpel
[plane
][2],
1576 ref
->hpel
[plane
][3], ref
->hpel
[plane
][0],
1577 ref
->avframe
->linesize
[plane
], width
, height
);
1578 s
->mpvencdsp
.draw_edges(ref
->hpel
[plane
][1], ref
->avframe
->linesize
[plane
], width
, height
, edge
, edge
, EDGE_TOP
| EDGE_BOTTOM
);
1579 s
->mpvencdsp
.draw_edges(ref
->hpel
[plane
][2], ref
->avframe
->linesize
[plane
], width
, height
, edge
, edge
, EDGE_TOP
| EDGE_BOTTOM
);
1580 s
->mpvencdsp
.draw_edges(ref
->hpel
[plane
][3], ref
->avframe
->linesize
[plane
], width
, height
, edge
, edge
, EDGE_TOP
| EDGE_BOTTOM
);
1582 ref
->interpolated
[plane
] = 1;
1586 * Dirac Specification ->
1587 * 13.0 Transform data syntax. transform_data()
1589 static int dirac_decode_frame_internal(DiracContext
*s
)
1592 int y
, i
, comp
, dsty
;
1595 /* [DIRAC_STD] 13.5.1 low_delay_transform_data() */
1596 for (comp
= 0; comp
< 3; comp
++) {
1597 Plane
*p
= &s
->plane
[comp
];
1598 memset(p
->idwt_buf
, 0, p
->idwt_stride
* p
->idwt_height
* sizeof(IDWTELEM
));
1604 for (comp
= 0; comp
< 3; comp
++) {
1605 Plane
*p
= &s
->plane
[comp
];
1606 uint8_t *frame
= s
->current_picture
->avframe
->data
[comp
];
1608 /* FIXME: small resolutions */
1609 for (i
= 0; i
< 4; i
++)
1610 s
->edge_emu_buffer
[i
] = s
->edge_emu_buffer_base
+ i
*FFALIGN(p
->width
, 16);
1612 if (!s
->zero_res
&& !s
->low_delay
)
1614 memset(p
->idwt_buf
, 0, p
->idwt_stride
* p
->idwt_height
* sizeof(IDWTELEM
));
1615 decode_component(s
, comp
); /* [DIRAC_STD] 13.4.1 core_transform_data() */
1617 if (ff_spatial_idwt_init2(&d
, p
->idwt_buf
, p
->idwt_width
, p
->idwt_height
, p
->idwt_stride
,
1618 s
->wavelet_idx
+2, s
->wavelet_depth
, p
->idwt_tmp
))
1621 if (!s
->num_refs
) { /* intra */
1622 for (y
= 0; y
< p
->height
; y
+= 16) {
1623 ff_spatial_idwt_slice2(&d
, y
+16); /* decode */
1624 s
->diracdsp
.put_signed_rect_clamped(frame
+ y
*p
->stride
, p
->stride
,
1625 p
->idwt_buf
+ y
*p
->idwt_stride
, p
->idwt_stride
, p
->width
, 16);
1627 } else { /* inter */
1628 int rowheight
= p
->ybsep
*p
->stride
;
1630 select_dsp_funcs(s
, p
->width
, p
->height
, p
->xblen
, p
->yblen
);
1632 for (i
= 0; i
< s
->num_refs
; i
++)
1633 interpolate_refplane(s
, s
->ref_pics
[i
], comp
, p
->width
, p
->height
);
1635 memset(s
->mctmp
, 0, 4*p
->yoffset
*p
->stride
);
1638 for (y
= 0; y
< s
->blheight
; y
++) {
1640 start
= FFMAX(dsty
, 0);
1641 uint16_t *mctmp
= s
->mctmp
+ y
*rowheight
;
1642 DiracBlock
*blocks
= s
->blmotion
+ y
*s
->blwidth
;
1644 init_obmc_weights(s
, p
, y
);
1646 if (y
== s
->blheight
-1 || start
+p
->ybsep
> p
->height
)
1647 h
= p
->height
- start
;
1649 h
= p
->ybsep
- (start
- dsty
);
1653 memset(mctmp
+2*p
->yoffset
*p
->stride
, 0, 2*rowheight
);
1654 mc_row(s
, blocks
, mctmp
, comp
, dsty
);
1656 mctmp
+= (start
- dsty
)*p
->stride
+ p
->xoffset
;
1657 ff_spatial_idwt_slice2(&d
, start
+ h
); /* decode */
1658 s
->diracdsp
.add_rect_clamped(frame
+ start
*p
->stride
, mctmp
, p
->stride
,
1659 p
->idwt_buf
+ start
*p
->idwt_stride
, p
->idwt_stride
, p
->width
, h
);
1670 static int get_buffer_with_edge(AVCodecContext
*avctx
, AVFrame
*f
, int flags
)
1673 int chroma_x_shift
, chroma_y_shift
;
1674 avcodec_get_chroma_sub_sample(avctx
->pix_fmt
, &chroma_x_shift
, &chroma_y_shift
);
1676 f
->width
= avctx
->width
+ 2 * EDGE_WIDTH
;
1677 f
->height
= avctx
->height
+ 2 * EDGE_WIDTH
+ 2;
1678 ret
= ff_get_buffer(avctx
, f
, flags
);
1682 for (i
= 0; f
->data
[i
]; i
++) {
1683 int offset
= (EDGE_WIDTH
>> (i
&& i
<3 ? chroma_y_shift
: 0)) *
1684 f
->linesize
[i
] + 32;
1685 f
->data
[i
] += offset
;
1687 f
->width
= avctx
->width
;
1688 f
->height
= avctx
->height
;
1694 * Dirac Specification ->
1695 * 11.1.1 Picture Header. picture_header()
1697 static int dirac_decode_picture_header(DiracContext
*s
)
1700 int i
, j
, refnum
, refdist
;
1701 GetBitContext
*gb
= &s
->gb
;
1703 /* [DIRAC_STD] 11.1.1 Picture Header. picture_header() PICTURE_NUM */
1704 picnum
= s
->current_picture
->avframe
->display_picture_number
= get_bits_long(gb
, 32);
1707 av_log(s
->avctx
,AV_LOG_DEBUG
,"PICTURE_NUM: %d\n",picnum
);
1709 /* if this is the first keyframe after a sequence header, start our
1710 reordering from here */
1711 if (s
->frame_number
< 0)
1712 s
->frame_number
= picnum
;
1714 s
->ref_pics
[0] = s
->ref_pics
[1] = NULL
;
1715 for (i
= 0; i
< s
->num_refs
; i
++) {
1716 refnum
= picnum
+ dirac_get_se_golomb(gb
);
1719 /* find the closest reference to the one we want */
1720 /* Jordi: this is needed if the referenced picture hasn't yet arrived */
1721 for (j
= 0; j
< MAX_REFERENCE_FRAMES
&& refdist
; j
++)
1722 if (s
->ref_frames
[j
]
1723 && FFABS(s
->ref_frames
[j
]->avframe
->display_picture_number
- refnum
) < refdist
) {
1724 s
->ref_pics
[i
] = s
->ref_frames
[j
];
1725 refdist
= FFABS(s
->ref_frames
[j
]->avframe
->display_picture_number
- refnum
);
1728 if (!s
->ref_pics
[i
] || refdist
)
1729 av_log(s
->avctx
, AV_LOG_DEBUG
, "Reference not found\n");
1731 /* if there were no references at all, allocate one */
1732 if (!s
->ref_pics
[i
])
1733 for (j
= 0; j
< MAX_FRAMES
; j
++)
1734 if (!s
->all_frames
[j
].avframe
->data
[0]) {
1735 s
->ref_pics
[i
] = &s
->all_frames
[j
];
1736 get_buffer_with_edge(s
->avctx
, s
->ref_pics
[i
]->avframe
, AV_GET_BUFFER_FLAG_REF
);
1741 /* retire the reference frames that are not used anymore */
1742 if (s
->current_picture
->avframe
->reference
) {
1743 retire
= picnum
+ dirac_get_se_golomb(gb
);
1744 if (retire
!= picnum
) {
1745 DiracFrame
*retire_pic
= remove_frame(s
->ref_frames
, retire
);
1748 retire_pic
->avframe
->reference
&= DELAYED_PIC_REF
;
1750 av_log(s
->avctx
, AV_LOG_DEBUG
, "Frame to retire not found\n");
1753 /* if reference array is full, remove the oldest as per the spec */
1754 while (add_frame(s
->ref_frames
, MAX_REFERENCE_FRAMES
, s
->current_picture
)) {
1755 av_log(s
->avctx
, AV_LOG_ERROR
, "Reference frame overflow\n");
1756 remove_frame(s
->ref_frames
, s
->ref_frames
[0]->avframe
->display_picture_number
)->avframe
->reference
&= DELAYED_PIC_REF
;
1761 if (dirac_unpack_prediction_parameters(s
)) /* [DIRAC_STD] 11.2 Picture Prediction Data. picture_prediction() */
1763 if (dirac_unpack_block_motion_data(s
)) /* [DIRAC_STD] 12. Block motion data syntax */
1766 if (dirac_unpack_idwt_params(s
)) /* [DIRAC_STD] 11.3 Wavelet transform data */
1773 static int get_delayed_pic(DiracContext
*s
, AVFrame
*picture
, int *got_frame
)
1775 DiracFrame
*out
= s
->delay_frames
[0];
1779 /* find frame with lowest picture number */
1780 for (i
= 1; s
->delay_frames
[i
]; i
++)
1781 if (s
->delay_frames
[i
]->avframe
->display_picture_number
< out
->avframe
->display_picture_number
) {
1782 out
= s
->delay_frames
[i
];
1786 for (i
= out_idx
; s
->delay_frames
[i
]; i
++)
1787 s
->delay_frames
[i
] = s
->delay_frames
[i
+1];
1790 out
->avframe
->reference
^= DELAYED_PIC_REF
;
1792 if((ret
= av_frame_ref(picture
, out
->avframe
)) < 0)
1800 * Dirac Specification ->
1801 * 9.6 Parse Info Header Syntax. parse_info()
1802 * 4 byte start code + byte parse code + 4 byte size + 4 byte previous size
1804 #define DATA_UNIT_HEADER_SIZE 13
1806 /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3
1807 inside the function parse_sequence() */
1808 static int dirac_decode_data_unit(AVCodecContext
*avctx
, const uint8_t *buf
, int size
)
1810 DiracContext
*s
= avctx
->priv_data
;
1811 DiracFrame
*pic
= NULL
;
1812 int ret
, i
, parse_code
= buf
[4];
1815 if (size
< DATA_UNIT_HEADER_SIZE
)
1818 init_get_bits(&s
->gb
, &buf
[13], 8*(size
- DATA_UNIT_HEADER_SIZE
));
1820 if (parse_code
== pc_seq_header
) {
1821 if (s
->seen_sequence_header
)
1824 /* [DIRAC_STD] 10. Sequence header */
1825 if (avpriv_dirac_parse_sequence_header(avctx
, &s
->gb
, &s
->source
))
1828 avcodec_get_chroma_sub_sample(avctx
->pix_fmt
, &s
->chroma_x_shift
, &s
->chroma_y_shift
);
1830 if (alloc_sequence_buffers(s
))
1833 s
->seen_sequence_header
= 1;
1834 } else if (parse_code
== pc_eos
) { /* [DIRAC_STD] End of Sequence */
1835 free_sequence_buffers(s
);
1836 s
->seen_sequence_header
= 0;
1837 } else if (parse_code
== pc_aux_data
) {
1838 if (buf
[13] == 1) { /* encoder implementation/version */
1840 /* versions older than 1.0.8 don't store quant delta for
1841 subbands with only one codeblock */
1842 if (sscanf(buf
+14, "Schroedinger %d.%d.%d", ver
, ver
+1, ver
+2) == 3)
1843 if (ver
[0] == 1 && ver
[1] == 0 && ver
[2] <= 7)
1844 s
->old_delta_quant
= 1;
1846 } else if (parse_code
& 0x8) { /* picture data unit */
1847 if (!s
->seen_sequence_header
) {
1848 av_log(avctx
, AV_LOG_DEBUG
, "Dropping frame without sequence header\n");
1852 /* find an unused frame */
1853 for (i
= 0; i
< MAX_FRAMES
; i
++)
1854 if (s
->all_frames
[i
].avframe
->data
[0] == NULL
)
1855 pic
= &s
->all_frames
[i
];
1857 av_log(avctx
, AV_LOG_ERROR
, "framelist full\n");
1861 av_frame_unref(pic
->avframe
);
1863 /* [DIRAC_STD] Defined in 9.6.1 ... */
1864 tmp
= parse_code
& 0x03; /* [DIRAC_STD] num_refs() */
1866 av_log(avctx
, AV_LOG_ERROR
, "num_refs of 3\n");
1870 s
->is_arith
= (parse_code
& 0x48) == 0x08; /* [DIRAC_STD] using_ac() */
1871 s
->low_delay
= (parse_code
& 0x88) == 0x88; /* [DIRAC_STD] is_low_delay() */
1872 pic
->avframe
->reference
= (parse_code
& 0x0C) == 0x0C; /* [DIRAC_STD] is_reference() */
1873 pic
->avframe
->key_frame
= s
->num_refs
== 0; /* [DIRAC_STD] is_intra() */
1874 pic
->avframe
->pict_type
= s
->num_refs
+ 1; /* Definition of AVPictureType in avutil.h */
1876 if ((ret
= get_buffer_with_edge(avctx
, pic
->avframe
, (parse_code
& 0x0C) == 0x0C ? AV_GET_BUFFER_FLAG_REF
: 0)) < 0)
1878 s
->current_picture
= pic
;
1879 s
->plane
[0].stride
= pic
->avframe
->linesize
[0];
1880 s
->plane
[1].stride
= pic
->avframe
->linesize
[1];
1881 s
->plane
[2].stride
= pic
->avframe
->linesize
[2];
1883 if (alloc_buffers(s
, FFMAX3(FFABS(s
->plane
[0].stride
), FFABS(s
->plane
[1].stride
), FFABS(s
->plane
[2].stride
))) < 0)
1884 return AVERROR(ENOMEM
);
1886 /* [DIRAC_STD] 11.1 Picture parse. picture_parse() */
1887 if (dirac_decode_picture_header(s
))
1890 /* [DIRAC_STD] 13.0 Transform data syntax. transform_data() */
1891 if (dirac_decode_frame_internal(s
))
1897 static int dirac_decode_frame(AVCodecContext
*avctx
, void *data
, int *got_frame
, AVPacket
*pkt
)
1899 DiracContext
*s
= avctx
->priv_data
;
1900 AVFrame
*picture
= data
;
1901 uint8_t *buf
= pkt
->data
;
1902 int buf_size
= pkt
->size
;
1903 int i
, data_unit_size
, buf_idx
= 0;
1906 /* release unused frames */
1907 for (i
= 0; i
< MAX_FRAMES
; i
++)
1908 if (s
->all_frames
[i
].avframe
->data
[0] && !s
->all_frames
[i
].avframe
->reference
) {
1909 av_frame_unref(s
->all_frames
[i
].avframe
);
1910 memset(s
->all_frames
[i
].interpolated
, 0, sizeof(s
->all_frames
[i
].interpolated
));
1913 s
->current_picture
= NULL
;
1916 /* end of stream, so flush delayed pics */
1918 return get_delayed_pic(s
, (AVFrame
*)data
, got_frame
);
1921 /*[DIRAC_STD] Here starts the code from parse_info() defined in 9.6
1922 [DIRAC_STD] PARSE_INFO_PREFIX = "BBCD" as defined in ISO/IEC 646
1923 BBCD start code search */
1924 for (; buf_idx
+ DATA_UNIT_HEADER_SIZE
< buf_size
; buf_idx
++) {
1925 if (buf
[buf_idx
] == 'B' && buf
[buf_idx
+1] == 'B' &&
1926 buf
[buf_idx
+2] == 'C' && buf
[buf_idx
+3] == 'D')
1929 /* BBCD found or end of data */
1930 if (buf_idx
+ DATA_UNIT_HEADER_SIZE
>= buf_size
)
1933 data_unit_size
= AV_RB32(buf
+buf_idx
+5);
1934 if (buf_idx
+ data_unit_size
> buf_size
|| !data_unit_size
) {
1935 if(buf_idx
+ data_unit_size
> buf_size
)
1936 av_log(s
->avctx
, AV_LOG_ERROR
,
1937 "Data unit with size %d is larger than input buffer, discarding\n",
1942 /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3 inside the function parse_sequence() */
1943 if (dirac_decode_data_unit(avctx
, buf
+buf_idx
, data_unit_size
))
1945 av_log(s
->avctx
, AV_LOG_ERROR
,"Error in dirac_decode_data_unit\n");
1948 buf_idx
+= data_unit_size
;
1951 if (!s
->current_picture
)
1954 if (s
->current_picture
->avframe
->display_picture_number
> s
->frame_number
) {
1955 DiracFrame
*delayed_frame
= remove_frame(s
->delay_frames
, s
->frame_number
);
1957 s
->current_picture
->avframe
->reference
|= DELAYED_PIC_REF
;
1959 if (add_frame(s
->delay_frames
, MAX_DELAY
, s
->current_picture
)) {
1960 int min_num
= s
->delay_frames
[0]->avframe
->display_picture_number
;
1961 /* Too many delayed frames, so we display the frame with the lowest pts */
1962 av_log(avctx
, AV_LOG_ERROR
, "Delay frame overflow\n");
1964 for (i
= 1; s
->delay_frames
[i
]; i
++)
1965 if (s
->delay_frames
[i
]->avframe
->display_picture_number
< min_num
)
1966 min_num
= s
->delay_frames
[i
]->avframe
->display_picture_number
;
1968 delayed_frame
= remove_frame(s
->delay_frames
, min_num
);
1969 add_frame(s
->delay_frames
, MAX_DELAY
, s
->current_picture
);
1972 if (delayed_frame
) {
1973 delayed_frame
->avframe
->reference
^= DELAYED_PIC_REF
;
1974 if((ret
=av_frame_ref(data
, delayed_frame
->avframe
)) < 0)
1978 } else if (s
->current_picture
->avframe
->display_picture_number
== s
->frame_number
) {
1979 /* The right frame at the right time :-) */
1980 if((ret
=av_frame_ref(data
, s
->current_picture
->avframe
)) < 0)
1986 s
->frame_number
= picture
->display_picture_number
+ 1;
1991 AVCodec ff_dirac_decoder
= {
1993 .long_name
= NULL_IF_CONFIG_SMALL("BBC Dirac VC-2"),
1994 .type
= AVMEDIA_TYPE_VIDEO
,
1995 .id
= AV_CODEC_ID_DIRAC
,
1996 .priv_data_size
= sizeof(DiracContext
),
1997 .init
= dirac_decode_init
,
1998 .close
= dirac_decode_end
,
1999 .decode
= dirac_decode_frame
,
2000 .capabilities
= CODEC_CAP_DELAY
,
2001 .flush
= dirac_decode_flush
,