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>
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/thread.h"
33 #include "bytestream.h"
36 #include "dirac_arith.h"
37 #include "dirac_vlc.h"
38 #include "mpeg12data.h"
39 #include "libavcodec/mpegvideo.h"
40 #include "mpegvideoencdsp.h"
41 #include "dirac_dwt.h"
48 * The spec limits this to 3 for frame coding, but in practice can be as high as 6
50 #define MAX_REFERENCE_FRAMES 8
51 #define MAX_DELAY 5 /* limit for main profile for frame coding (TODO: field coding) */
52 #define MAX_FRAMES (MAX_REFERENCE_FRAMES + MAX_DELAY + 1)
53 #define MAX_QUANT 255 /* max quant for VC-2 */
54 #define MAX_BLOCKSIZE 32 /* maximum xblen/yblen we support */
57 * DiracBlock->ref flags, if set then the block does MC from the given ref
59 #define DIRAC_REF_MASK_REF1 1
60 #define DIRAC_REF_MASK_REF2 2
61 #define DIRAC_REF_MASK_GLOBAL 4
64 * Value of Picture.reference when Picture is not a reference picture, but
65 * is held for delayed output.
67 #define DELAYED_PIC_REF 4
69 #define CALC_PADDING(size, depth) \
70 (((size + (1 << depth) - 1) >> depth) << depth)
72 #define DIVRNDUP(a, b) (((a) + (b) - 1) / (b))
76 int interpolated[3]; /* 1 if hpel[] is valid */
78 uint8_t *hpel_base[3][4];
86 } u; /* anonymous unions aren't in C99 :( */
90 typedef struct SubBand {
93 int stride; /* in bytes */
99 struct SubBand *parent;
103 const uint8_t *coeff_data;
106 typedef struct Plane {
116 /* block separation (block n+1 starts after this many pixels in block n) */
119 /* amount of overspill on each edge (half of the overlap between blocks) */
123 SubBand band[MAX_DWT_LEVELS][4];
126 /* Used by Low Delay and High Quality profiles */
127 typedef struct DiracSlice {
134 typedef struct DiracContext {
135 AVCodecContext *avctx;
136 MpegvideoEncDSPContext mpvencdsp;
137 VideoDSPContext vdsp;
138 DiracDSPContext diracdsp;
139 DiracGolombLUT *reader_ctx;
140 DiracVersionInfo version;
142 AVDiracSeqHeader seq;
143 int seen_sequence_header;
144 int64_t frame_number; /* number of the next frame to display */
149 int bit_depth; /* bit depth */
150 int pshift; /* pixel shift = bit_depth > 8 */
152 int zero_res; /* zero residue flag */
153 int is_arith; /* whether coeffs use arith or golomb coding */
154 int core_syntax; /* use core syntax only */
155 int low_delay; /* use the low delay syntax */
156 int hq_picture; /* high quality picture, enables low_delay */
157 int ld_picture; /* use low delay picture, turns on low_delay */
158 int dc_prediction; /* has dc prediction */
159 int globalmc_flag; /* use global motion compensation */
160 int num_refs; /* number of reference pictures */
162 /* wavelet decoding */
163 unsigned wavelet_depth; /* depth of the IDWT */
164 unsigned wavelet_idx;
167 * schroedinger older than 1.0.8 doesn't store
168 * quant delta if only one codebook exists in a band
170 unsigned old_delta_quant;
171 unsigned codeblock_mode;
173 unsigned num_x; /* number of horizontal slices */
174 unsigned num_y; /* number of vertical slices */
176 uint8_t *thread_buf; /* Per-thread buffer for coefficient storage */
177 int threads_num_buf; /* Current # of buffers allocated */
178 int thread_buf_size; /* Each thread has a buffer this size */
180 DiracSlice *slice_params_buf;
181 int slice_params_num_buf;
186 } codeblock[MAX_DWT_LEVELS+1];
189 AVRational bytes; /* average bytes per slice */
190 uint8_t quant[MAX_DWT_LEVELS][4]; /* [DIRAC_STD] E.1 */
194 unsigned prefix_bytes;
195 uint64_t size_scaler;
199 int pan_tilt[2]; /* pan/tilt vector */
200 int zrs[2][2]; /* zoom/rotate/shear matrix */
201 int perspective[2]; /* perspective vector */
203 unsigned perspective_exp;
206 /* motion compensation */
207 uint8_t mv_precision; /* [DIRAC_STD] REFS_WT_PRECISION */
208 int16_t weight[2]; /* [DIRAC_STD] REF1_WT and REF2_WT */
209 unsigned weight_log2denom; /* [DIRAC_STD] REFS_WT_PRECISION */
211 int blwidth; /* number of blocks (horizontally) */
212 int blheight; /* number of blocks (vertically) */
213 int sbwidth; /* number of superblocks (horizontally) */
214 int sbheight; /* number of superblocks (vertically) */
217 DiracBlock *blmotion;
219 uint8_t *edge_emu_buffer[4];
220 uint8_t *edge_emu_buffer_base;
222 uint16_t *mctmp; /* buffer holding the MC data multiplied by OBMC weights */
226 DECLARE_ALIGNED(16, uint8_t, obmc_weight)[3][MAX_BLOCKSIZE*MAX_BLOCKSIZE];
228 void (*put_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h);
229 void (*avg_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h);
230 void (*add_obmc)(uint16_t *dst, const uint8_t *src, int stride, const uint8_t *obmc_weight, int yblen);
231 dirac_weight_func weight_func;
232 dirac_biweight_func biweight_func;
234 DiracFrame *current_picture;
235 DiracFrame *ref_pics[2];
237 DiracFrame *ref_frames[MAX_REFERENCE_FRAMES+1];
238 DiracFrame *delay_frames[MAX_DELAY+1];
239 DiracFrame all_frames[MAX_FRAMES];
250 /* magic number division by 3 from schroedinger */
251 static inline int divide3(int x)
253 return (int)((x+1U)*21845 + 10922) >> 16;
256 static DiracFrame *remove_frame(DiracFrame *framelist[], int picnum)
258 DiracFrame *remove_pic = NULL;
259 int i, remove_idx = -1;
261 for (i = 0; framelist[i]; i++)
262 if (framelist[i]->avframe->display_picture_number == picnum) {
263 remove_pic = framelist[i];
268 for (i = remove_idx; framelist[i]; i++)
269 framelist[i] = framelist[i+1];
274 static int add_frame(DiracFrame *framelist[], int maxframes, DiracFrame *frame)
277 for (i = 0; i < maxframes; i++)
279 framelist[i] = frame;
285 static int alloc_sequence_buffers(DiracContext *s)
287 int sbwidth = DIVRNDUP(s->seq.width, 4);
288 int sbheight = DIVRNDUP(s->seq.height, 4);
289 int i, w, h, top_padding;
291 /* todo: think more about this / use or set Plane here */
292 for (i = 0; i < 3; i++) {
293 int max_xblen = MAX_BLOCKSIZE >> (i ? s->chroma_x_shift : 0);
294 int max_yblen = MAX_BLOCKSIZE >> (i ? s->chroma_y_shift : 0);
295 w = s->seq.width >> (i ? s->chroma_x_shift : 0);
296 h = s->seq.height >> (i ? s->chroma_y_shift : 0);
298 /* we allocate the max we support here since num decompositions can
299 * change from frame to frame. Stride is aligned to 16 for SIMD, and
300 * 1<<MAX_DWT_LEVELS top padding to avoid if(y>0) in arith decoding
301 * MAX_BLOCKSIZE padding for MC: blocks can spill up to half of that
303 top_padding = FFMAX(1<<MAX_DWT_LEVELS, max_yblen/2);
304 w = FFALIGN(CALC_PADDING(w, MAX_DWT_LEVELS), 8); /* FIXME: Should this be 16 for SSE??? */
305 h = top_padding + CALC_PADDING(h, MAX_DWT_LEVELS) + max_yblen/2;
307 s->plane[i].idwt.buf_base = av_mallocz_array((w+max_xblen), h * (2 << s->pshift));
308 s->plane[i].idwt.tmp = av_malloc_array((w+16), 2 << s->pshift);
309 s->plane[i].idwt.buf = s->plane[i].idwt.buf_base + (top_padding*w)*(2 << s->pshift);
310 if (!s->plane[i].idwt.buf_base || !s->plane[i].idwt.tmp)
311 return AVERROR(ENOMEM);
314 /* fixme: allocate using real stride here */
315 s->sbsplit = av_malloc_array(sbwidth, sbheight);
316 s->blmotion = av_malloc_array(sbwidth, sbheight * 16 * sizeof(*s->blmotion));
318 if (!s->sbsplit || !s->blmotion)
319 return AVERROR(ENOMEM);
323 static int alloc_buffers(DiracContext *s, int stride)
325 int w = s->seq.width;
326 int h = s->seq.height;
328 av_assert0(stride >= w);
331 if (s->buffer_stride >= stride)
333 s->buffer_stride = 0;
335 av_freep(&s->edge_emu_buffer_base);
336 memset(s->edge_emu_buffer, 0, sizeof(s->edge_emu_buffer));
338 av_freep(&s->mcscratch);
340 s->edge_emu_buffer_base = av_malloc_array(stride, MAX_BLOCKSIZE);
342 s->mctmp = av_malloc_array((stride+MAX_BLOCKSIZE), (h+MAX_BLOCKSIZE) * sizeof(*s->mctmp));
343 s->mcscratch = av_malloc_array(stride, MAX_BLOCKSIZE);
345 if (!s->edge_emu_buffer_base || !s->mctmp || !s->mcscratch)
346 return AVERROR(ENOMEM);
348 s->buffer_stride = stride;
352 static void free_sequence_buffers(DiracContext *s)
356 for (i = 0; i < MAX_FRAMES; i++) {
357 if (s->all_frames[i].avframe->data[0]) {
358 av_frame_unref(s->all_frames[i].avframe);
359 memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated));
362 for (j = 0; j < 3; j++)
363 for (k = 1; k < 4; k++)
364 av_freep(&s->all_frames[i].hpel_base[j][k]);
367 memset(s->ref_frames, 0, sizeof(s->ref_frames));
368 memset(s->delay_frames, 0, sizeof(s->delay_frames));
370 for (i = 0; i < 3; i++) {
371 av_freep(&s->plane[i].idwt.buf_base);
372 av_freep(&s->plane[i].idwt.tmp);
375 s->buffer_stride = 0;
376 av_freep(&s->sbsplit);
377 av_freep(&s->blmotion);
378 av_freep(&s->edge_emu_buffer_base);
381 av_freep(&s->mcscratch);
384 static AVOnce dirac_arith_init = AV_ONCE_INIT;
386 static av_cold int dirac_decode_init(AVCodecContext *avctx)
388 DiracContext *s = avctx->priv_data;
392 s->frame_number = -1;
394 s->thread_buf = NULL;
395 s->threads_num_buf = -1;
396 s->thread_buf_size = -1;
398 ff_dirac_golomb_reader_init(&s->reader_ctx);
399 ff_diracdsp_init(&s->diracdsp);
400 ff_mpegvideoencdsp_init(&s->mpvencdsp, avctx);
401 ff_videodsp_init(&s->vdsp, 8);
403 for (i = 0; i < MAX_FRAMES; i++) {
404 s->all_frames[i].avframe = av_frame_alloc();
405 if (!s->all_frames[i].avframe) {
407 av_frame_free(&s->all_frames[--i].avframe);
408 return AVERROR(ENOMEM);
411 ret = ff_thread_once(&dirac_arith_init, ff_dirac_init_arith_tables);
413 return AVERROR_UNKNOWN;
418 static void dirac_decode_flush(AVCodecContext *avctx)
420 DiracContext *s = avctx->priv_data;
421 free_sequence_buffers(s);
422 s->seen_sequence_header = 0;
423 s->frame_number = -1;
426 static av_cold int dirac_decode_end(AVCodecContext *avctx)
428 DiracContext *s = avctx->priv_data;
431 ff_dirac_golomb_reader_end(&s->reader_ctx);
433 dirac_decode_flush(avctx);
434 for (i = 0; i < MAX_FRAMES; i++)
435 av_frame_free(&s->all_frames[i].avframe);
437 av_freep(&s->thread_buf);
438 av_freep(&s->slice_params_buf);
443 static inline int coeff_unpack_golomb(GetBitContext *gb, int qfactor, int qoffset)
445 int coeff = dirac_get_se_golomb(gb);
446 const unsigned sign = FFSIGN(coeff);
448 coeff = sign*((sign * coeff * qfactor + qoffset) >> 2);
452 #define SIGN_CTX(x) (CTX_SIGN_ZERO + ((x) > 0) - ((x) < 0))
454 #define UNPACK_ARITH(n, type) \
455 static inline void coeff_unpack_arith_##n(DiracArith *c, int qfactor, int qoffset, \
456 SubBand *b, type *buf, int x, int y) \
458 int sign, sign_pred = 0, pred_ctx = CTX_ZPZN_F1; \
460 const int mstride = -(b->stride >> (1+b->pshift)); \
462 const type *pbuf = (type *)b->parent->ibuf; \
463 const int stride = b->parent->stride >> (1+b->parent->pshift); \
464 pred_ctx += !!pbuf[stride * (y>>1) + (x>>1)] << 1; \
466 if (b->orientation == subband_hl) \
467 sign_pred = buf[mstride]; \
469 pred_ctx += !(buf[-1] | buf[mstride] | buf[-1 + mstride]); \
470 if (b->orientation == subband_lh) \
471 sign_pred = buf[-1]; \
473 pred_ctx += !buf[mstride]; \
475 coeff = dirac_get_arith_uint(c, pred_ctx, CTX_COEFF_DATA); \
477 coeff = (coeff * qfactor + qoffset) >> 2; \
478 sign = dirac_get_arith_bit(c, SIGN_CTX(sign_pred)); \
479 coeff = (coeff ^ -sign) + sign; \
484 UNPACK_ARITH(8, int16_t)
485 UNPACK_ARITH(10, int32_t)
488 * Decode the coeffs in the rectangle defined by left, right, top, bottom
489 * [DIRAC_STD] 13.4.3.2 Codeblock unpacking loop. codeblock()
491 static inline int codeblock(DiracContext *s, SubBand *b,
492 GetBitContext *gb, DiracArith *c,
493 int left, int right, int top, int bottom,
494 int blockcnt_one, int is_arith)
496 int x, y, zero_block;
497 int qoffset, qfactor;
500 /* check for any coded coefficients in this codeblock */
503 zero_block = dirac_get_arith_bit(c, CTX_ZERO_BLOCK);
505 zero_block = get_bits1(gb);
511 if (s->codeblock_mode && !(s->old_delta_quant && blockcnt_one)) {
514 quant = dirac_get_arith_int(c, CTX_DELTA_Q_F, CTX_DELTA_Q_DATA);
516 quant = dirac_get_se_golomb(gb);
517 if (quant > INT_MAX - b->quant || b->quant + quant < 0) {
518 av_log(s->avctx, AV_LOG_ERROR, "Invalid quant\n");
519 return AVERROR_INVALIDDATA;
524 if (b->quant > (DIRAC_MAX_QUANT_INDEX - 1)) {
525 av_log(s->avctx, AV_LOG_ERROR, "Unsupported quant %d\n", b->quant);
527 return AVERROR_INVALIDDATA;
530 qfactor = ff_dirac_qscale_tab[b->quant];
531 /* TODO: context pointer? */
533 qoffset = ff_dirac_qoffset_intra_tab[b->quant] + 2;
535 qoffset = ff_dirac_qoffset_inter_tab[b->quant] + 2;
537 buf = b->ibuf + top * b->stride;
539 for (y = top; y < bottom; y++) {
540 for (x = left; x < right; x++) {
542 coeff_unpack_arith_10(c, qfactor, qoffset, b, (int32_t*)(buf)+x, x, y);
544 coeff_unpack_arith_8(c, qfactor, qoffset, b, (int16_t*)(buf)+x, x, y);
550 for (y = top; y < bottom; y++) {
551 if (get_bits_left(gb) < 1)
552 return AVERROR_INVALIDDATA;
553 for (x = left; x < right; x++) {
554 int val = coeff_unpack_golomb(gb, qfactor, qoffset);
556 AV_WN32(&buf[4*x], val);
558 AV_WN16(&buf[2*x], val);
568 * Dirac Specification ->
569 * 13.3 intra_dc_prediction(band)
571 #define INTRA_DC_PRED(n, type) \
572 static inline void intra_dc_prediction_##n(SubBand *b) \
574 type *buf = (type*)b->ibuf; \
577 for (x = 1; x < b->width; x++) \
578 buf[x] += buf[x-1]; \
579 buf += (b->stride >> (1+b->pshift)); \
581 for (y = 1; y < b->height; y++) { \
582 buf[0] += buf[-(b->stride >> (1+b->pshift))]; \
584 for (x = 1; x < b->width; x++) { \
585 int pred = buf[x - 1] + buf[x - (b->stride >> (1+b->pshift))] + buf[x - (b->stride >> (1+b->pshift))-1]; \
586 buf[x] += divide3(pred); \
588 buf += (b->stride >> (1+b->pshift)); \
592 INTRA_DC_PRED(8, int16_t)
593 INTRA_DC_PRED(10, uint32_t)
596 * Dirac Specification ->
597 * 13.4.2 Non-skipped subbands. subband_coeffs()
599 static av_always_inline int decode_subband_internal(DiracContext *s, SubBand *b, int is_arith)
601 int cb_x, cb_y, left, right, top, bottom;
604 int cb_width = s->codeblock[b->level + (b->orientation != subband_ll)].width;
605 int cb_height = s->codeblock[b->level + (b->orientation != subband_ll)].height;
606 int blockcnt_one = (cb_width + cb_height) == 2;
612 init_get_bits8(&gb, b->coeff_data, b->length);
615 ff_dirac_init_arith_decoder(&c, &gb, b->length);
618 for (cb_y = 0; cb_y < cb_height; cb_y++) {
619 bottom = (b->height * (cb_y+1LL)) / cb_height;
621 for (cb_x = 0; cb_x < cb_width; cb_x++) {
622 right = (b->width * (cb_x+1LL)) / cb_width;
623 ret = codeblock(s, b, &gb, &c, left, right, top, bottom, blockcnt_one, is_arith);
631 if (b->orientation == subband_ll && s->num_refs == 0) {
633 intra_dc_prediction_10(b);
635 intra_dc_prediction_8(b);
641 static int decode_subband_arith(AVCodecContext *avctx, void *b)
643 DiracContext *s = avctx->priv_data;
644 return decode_subband_internal(s, b, 1);
647 static int decode_subband_golomb(AVCodecContext *avctx, void *arg)
649 DiracContext *s = avctx->priv_data;
651 return decode_subband_internal(s, *b, 0);
655 * Dirac Specification ->
656 * [DIRAC_STD] 13.4.1 core_transform_data()
658 static int decode_component(DiracContext *s, int comp)
660 AVCodecContext *avctx = s->avctx;
661 SubBand *bands[3*MAX_DWT_LEVELS+1];
662 enum dirac_subband orientation;
663 int level, num_bands = 0;
664 int ret[3*MAX_DWT_LEVELS+1];
666 int damaged_count = 0;
668 /* Unpack all subbands at all levels. */
669 for (level = 0; level < s->wavelet_depth; level++) {
670 for (orientation = !!level; orientation < 4; orientation++) {
671 SubBand *b = &s->plane[comp].band[level][orientation];
672 bands[num_bands++] = b;
674 align_get_bits(&s->gb);
675 /* [DIRAC_STD] 13.4.2 subband() */
676 b->length = get_interleaved_ue_golomb(&s->gb);
678 b->quant = get_interleaved_ue_golomb(&s->gb);
679 align_get_bits(&s->gb);
680 b->coeff_data = s->gb.buffer + get_bits_count(&s->gb)/8;
681 b->length = FFMIN(b->length, FFMAX(get_bits_left(&s->gb)/8, 0));
682 skip_bits_long(&s->gb, b->length*8);
685 /* arithmetic coding has inter-level dependencies, so we can only execute one level at a time */
687 avctx->execute(avctx, decode_subband_arith, &s->plane[comp].band[level][!!level],
688 ret + 3*level + !!level, 4-!!level, sizeof(SubBand));
690 /* golomb coding has no inter-level dependencies, so we can execute all subbands in parallel */
692 avctx->execute(avctx, decode_subband_golomb, bands, ret, num_bands, sizeof(SubBand*));
694 for (i = 0; i < s->wavelet_depth * 3 + 1; i++) {
698 if (damaged_count > (s->wavelet_depth * 3 + 1) /2)
699 return AVERROR_INVALIDDATA;
704 #define PARSE_VALUES(type, x, gb, ebits, buf1, buf2) \
705 type *buf = (type *)buf1; \
706 buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); \
707 if (get_bits_count(gb) >= ebits) \
710 buf = (type *)buf2; \
711 buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); \
712 if (get_bits_count(gb) >= ebits) \
716 static void decode_subband(DiracContext *s, GetBitContext *gb, int quant,
717 int slice_x, int slice_y, int bits_end,
718 SubBand *b1, SubBand *b2)
720 int left = b1->width * slice_x / s->num_x;
721 int right = b1->width *(slice_x+1) / s->num_x;
722 int top = b1->height * slice_y / s->num_y;
723 int bottom = b1->height *(slice_y+1) / s->num_y;
725 int qfactor, qoffset;
727 uint8_t *buf1 = b1->ibuf + top * b1->stride;
728 uint8_t *buf2 = b2 ? b2->ibuf + top * b2->stride: NULL;
731 if (quant > (DIRAC_MAX_QUANT_INDEX - 1)) {
732 av_log(s->avctx, AV_LOG_ERROR, "Unsupported quant %d\n", quant);
735 qfactor = ff_dirac_qscale_tab[quant];
736 qoffset = ff_dirac_qoffset_intra_tab[quant] + 2;
737 /* we have to constantly check for overread since the spec explicitly
738 requires this, with the meaning that all remaining coeffs are set to 0 */
739 if (get_bits_count(gb) >= bits_end)
743 for (y = top; y < bottom; y++) {
744 for (x = left; x < right; x++) {
745 PARSE_VALUES(int32_t, x, gb, bits_end, buf1, buf2);
753 for (y = top; y < bottom; y++) {
754 for (x = left; x < right; x++) {
755 PARSE_VALUES(int16_t, x, gb, bits_end, buf1, buf2);
765 * Dirac Specification ->
766 * 13.5.2 Slices. slice(sx,sy)
768 static int decode_lowdelay_slice(AVCodecContext *avctx, void *arg)
770 DiracContext *s = avctx->priv_data;
771 DiracSlice *slice = arg;
772 GetBitContext *gb = &slice->gb;
773 enum dirac_subband orientation;
774 int level, quant, chroma_bits, chroma_end;
776 int quant_base = get_bits(gb, 7); /*[DIRAC_STD] qindex */
777 int length_bits = av_log2(8 * slice->bytes)+1;
778 int luma_bits = get_bits_long(gb, length_bits);
779 int luma_end = get_bits_count(gb) + FFMIN(luma_bits, get_bits_left(gb));
781 /* [DIRAC_STD] 13.5.5.2 luma_slice_band */
782 for (level = 0; level < s->wavelet_depth; level++)
783 for (orientation = !!level; orientation < 4; orientation++) {
784 quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0);
785 decode_subband(s, gb, quant, slice->slice_x, slice->slice_y, luma_end,
786 &s->plane[0].band[level][orientation], NULL);
789 /* consume any unused bits from luma */
790 skip_bits_long(gb, get_bits_count(gb) - luma_end);
792 chroma_bits = 8*slice->bytes - 7 - length_bits - luma_bits;
793 chroma_end = get_bits_count(gb) + FFMIN(chroma_bits, get_bits_left(gb));
794 /* [DIRAC_STD] 13.5.5.3 chroma_slice_band */
795 for (level = 0; level < s->wavelet_depth; level++)
796 for (orientation = !!level; orientation < 4; orientation++) {
797 quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0);
798 decode_subband(s, gb, quant, slice->slice_x, slice->slice_y, chroma_end,
799 &s->plane[1].band[level][orientation],
800 &s->plane[2].band[level][orientation]);
806 typedef struct SliceCoeffs {
814 static int subband_coeffs(DiracContext *s, int x, int y, int p,
815 SliceCoeffs c[MAX_DWT_LEVELS])
818 for (level = 0; level < s->wavelet_depth; level++) {
819 SliceCoeffs *o = &c[level];
820 SubBand *b = &s->plane[p].band[level][3]; /* orientation doens't matter */
821 o->top = b->height * y / s->num_y;
822 o->left = b->width * x / s->num_x;
823 o->tot_h = ((b->width * (x + 1)) / s->num_x) - o->left;
824 o->tot_v = ((b->height * (y + 1)) / s->num_y) - o->top;
825 o->tot = o->tot_h*o->tot_v;
826 coef += o->tot * (4 - !!level);
832 * VC-2 Specification ->
833 * 13.5.3 hq_slice(sx,sy)
835 static int decode_hq_slice(DiracContext *s, DiracSlice *slice, uint8_t *tmp_buf)
837 int i, level, orientation, quant_idx;
838 int qfactor[MAX_DWT_LEVELS][4], qoffset[MAX_DWT_LEVELS][4];
839 GetBitContext *gb = &slice->gb;
840 SliceCoeffs coeffs_num[MAX_DWT_LEVELS];
842 skip_bits_long(gb, 8*s->highquality.prefix_bytes);
843 quant_idx = get_bits(gb, 8);
845 if (quant_idx > DIRAC_MAX_QUANT_INDEX - 1) {
846 av_log(s->avctx, AV_LOG_ERROR, "Invalid quantization index - %i\n", quant_idx);
847 return AVERROR_INVALIDDATA;
850 /* Slice quantization (slice_quantizers() in the specs) */
851 for (level = 0; level < s->wavelet_depth; level++) {
852 for (orientation = !!level; orientation < 4; orientation++) {
853 const int quant = FFMAX(quant_idx - s->lowdelay.quant[level][orientation], 0);
854 qfactor[level][orientation] = ff_dirac_qscale_tab[quant];
855 qoffset[level][orientation] = ff_dirac_qoffset_intra_tab[quant] + 2;
859 /* Luma + 2 Chroma planes */
860 for (i = 0; i < 3; i++) {
861 int coef_num, coef_par, off = 0;
862 int64_t length = s->highquality.size_scaler*get_bits(gb, 8);
863 int64_t bits_end = get_bits_count(gb) + 8*length;
864 const uint8_t *addr = align_get_bits(gb);
866 if (length*8 > get_bits_left(gb)) {
867 av_log(s->avctx, AV_LOG_ERROR, "end too far away\n");
868 return AVERROR_INVALIDDATA;
871 coef_num = subband_coeffs(s, slice->slice_x, slice->slice_y, i, coeffs_num);
874 coef_par = ff_dirac_golomb_read_32bit(s->reader_ctx, addr,
875 length, tmp_buf, coef_num);
877 coef_par = ff_dirac_golomb_read_16bit(s->reader_ctx, addr,
878 length, tmp_buf, coef_num);
880 if (coef_num > coef_par) {
881 const int start_b = coef_par * (1 << (s->pshift + 1));
882 const int end_b = coef_num * (1 << (s->pshift + 1));
883 memset(&tmp_buf[start_b], 0, end_b - start_b);
886 for (level = 0; level < s->wavelet_depth; level++) {
887 const SliceCoeffs *c = &coeffs_num[level];
888 for (orientation = !!level; orientation < 4; orientation++) {
889 const SubBand *b1 = &s->plane[i].band[level][orientation];
890 uint8_t *buf = b1->ibuf + c->top * b1->stride + (c->left << (s->pshift + 1));
892 /* Change to c->tot_h <= 4 for AVX2 dequantization */
893 const int qfunc = s->pshift + 2*(c->tot_h <= 2);
894 s->diracdsp.dequant_subband[qfunc](&tmp_buf[off], buf, b1->stride,
895 qfactor[level][orientation],
896 qoffset[level][orientation],
899 off += c->tot << (s->pshift + 1);
903 skip_bits_long(gb, bits_end - get_bits_count(gb));
909 static int decode_hq_slice_row(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
912 DiracContext *s = avctx->priv_data;
913 DiracSlice *slices = ((DiracSlice *)arg) + s->num_x*jobnr;
914 uint8_t *thread_buf = &s->thread_buf[s->thread_buf_size*threadnr];
915 for (i = 0; i < s->num_x; i++)
916 decode_hq_slice(s, &slices[i], thread_buf);
921 * Dirac Specification ->
922 * 13.5.1 low_delay_transform_data()
924 static int decode_lowdelay(DiracContext *s)
926 AVCodecContext *avctx = s->avctx;
927 int slice_x, slice_y, bufsize;
928 int64_t coef_buf_size, bytes = 0;
931 SliceCoeffs tmp[MAX_DWT_LEVELS];
934 if (s->slice_params_num_buf != (s->num_x * s->num_y)) {
935 s->slice_params_buf = av_realloc_f(s->slice_params_buf, s->num_x * s->num_y, sizeof(DiracSlice));
936 if (!s->slice_params_buf) {
937 av_log(s->avctx, AV_LOG_ERROR, "slice params buffer allocation failure\n");
938 s->slice_params_num_buf = 0;
939 return AVERROR(ENOMEM);
941 s->slice_params_num_buf = s->num_x * s->num_y;
943 slices = s->slice_params_buf;
945 /* 8 becacuse that's how much the golomb reader could overread junk data
946 * from another plane/slice at most, and 512 because SIMD */
947 coef_buf_size = subband_coeffs(s, s->num_x - 1, s->num_y - 1, 0, tmp) + 8;
948 coef_buf_size = (coef_buf_size << (1 + s->pshift)) + 512;
950 if (s->threads_num_buf != avctx->thread_count ||
951 s->thread_buf_size != coef_buf_size) {
952 s->threads_num_buf = avctx->thread_count;
953 s->thread_buf_size = coef_buf_size;
954 s->thread_buf = av_realloc_f(s->thread_buf, avctx->thread_count, s->thread_buf_size);
955 if (!s->thread_buf) {
956 av_log(s->avctx, AV_LOG_ERROR, "thread buffer allocation failure\n");
957 return AVERROR(ENOMEM);
961 align_get_bits(&s->gb);
962 /*[DIRAC_STD] 13.5.2 Slices. slice(sx,sy) */
963 buf = s->gb.buffer + get_bits_count(&s->gb)/8;
964 bufsize = get_bits_left(&s->gb);
969 for (slice_y = 0; bufsize > 0 && slice_y < s->num_y; slice_y++) {
970 for (slice_x = 0; bufsize > 0 && slice_x < s->num_x; slice_x++) {
971 bytes = s->highquality.prefix_bytes + 1;
972 for (i = 0; i < 3; i++) {
973 if (bytes <= bufsize/8)
974 bytes += buf[bytes] * s->highquality.size_scaler + 1;
976 if (bytes >= INT_MAX || bytes*8 > bufsize) {
977 av_log(s->avctx, AV_LOG_ERROR, "too many bytes\n");
978 return AVERROR_INVALIDDATA;
981 slices[slice_num].bytes = bytes;
982 slices[slice_num].slice_x = slice_x;
983 slices[slice_num].slice_y = slice_y;
984 init_get_bits(&slices[slice_num].gb, buf, bufsize);
988 if (bufsize/8 >= bytes)
995 if (s->num_x*s->num_y != slice_num) {
996 av_log(s->avctx, AV_LOG_ERROR, "too few slices\n");
997 return AVERROR_INVALIDDATA;
1000 avctx->execute2(avctx, decode_hq_slice_row, slices, NULL, s->num_y);
1002 for (slice_y = 0; bufsize > 0 && slice_y < s->num_y; slice_y++) {
1003 for (slice_x = 0; bufsize > 0 && slice_x < s->num_x; slice_x++) {
1004 bytes = (slice_num+1) * (int64_t)s->lowdelay.bytes.num / s->lowdelay.bytes.den
1005 - slice_num * (int64_t)s->lowdelay.bytes.num / s->lowdelay.bytes.den;
1006 if (bytes >= INT_MAX || bytes*8 > bufsize) {
1007 av_log(s->avctx, AV_LOG_ERROR, "too many bytes\n");
1008 return AVERROR_INVALIDDATA;
1010 slices[slice_num].bytes = bytes;
1011 slices[slice_num].slice_x = slice_x;
1012 slices[slice_num].slice_y = slice_y;
1013 init_get_bits(&slices[slice_num].gb, buf, bufsize);
1017 if (bufsize/8 >= bytes)
1023 avctx->execute(avctx, decode_lowdelay_slice, slices, NULL, slice_num,
1024 sizeof(DiracSlice)); /* [DIRAC_STD] 13.5.2 Slices */
1027 if (s->dc_prediction) {
1029 intra_dc_prediction_10(&s->plane[0].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1030 intra_dc_prediction_10(&s->plane[1].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1031 intra_dc_prediction_10(&s->plane[2].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1033 intra_dc_prediction_8(&s->plane[0].band[0][0]);
1034 intra_dc_prediction_8(&s->plane[1].band[0][0]);
1035 intra_dc_prediction_8(&s->plane[2].band[0][0]);
1042 static void init_planes(DiracContext *s)
1044 int i, w, h, level, orientation;
1046 for (i = 0; i < 3; i++) {
1047 Plane *p = &s->plane[i];
1049 p->width = s->seq.width >> (i ? s->chroma_x_shift : 0);
1050 p->height = s->seq.height >> (i ? s->chroma_y_shift : 0);
1051 p->idwt.width = w = CALC_PADDING(p->width , s->wavelet_depth);
1052 p->idwt.height = h = CALC_PADDING(p->height, s->wavelet_depth);
1053 p->idwt.stride = FFALIGN(p->idwt.width, 8) << (1 + s->pshift);
1055 for (level = s->wavelet_depth-1; level >= 0; level--) {
1058 for (orientation = !!level; orientation < 4; orientation++) {
1059 SubBand *b = &p->band[level][orientation];
1061 b->pshift = s->pshift;
1062 b->ibuf = p->idwt.buf;
1064 b->stride = p->idwt.stride << (s->wavelet_depth - level);
1067 b->orientation = orientation;
1069 if (orientation & 1)
1070 b->ibuf += w << (1+b->pshift);
1071 if (orientation > 1)
1072 b->ibuf += (b->stride>>1);
1075 b->parent = &p->band[level-1][orientation];
1080 p->xblen = s->plane[0].xblen >> s->chroma_x_shift;
1081 p->yblen = s->plane[0].yblen >> s->chroma_y_shift;
1082 p->xbsep = s->plane[0].xbsep >> s->chroma_x_shift;
1083 p->ybsep = s->plane[0].ybsep >> s->chroma_y_shift;
1086 p->xoffset = (p->xblen - p->xbsep)/2;
1087 p->yoffset = (p->yblen - p->ybsep)/2;
1092 * Unpack the motion compensation parameters
1093 * Dirac Specification ->
1094 * 11.2 Picture prediction data. picture_prediction()
1096 static int dirac_unpack_prediction_parameters(DiracContext *s)
1098 static const uint8_t default_blen[] = { 4, 12, 16, 24 };
1100 GetBitContext *gb = &s->gb;
1104 /* [DIRAC_STD] 11.2.2 Block parameters. block_parameters() */
1105 /* Luma and Chroma are equal. 11.2.3 */
1106 idx = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] index */
1109 av_log(s->avctx, AV_LOG_ERROR, "Block prediction index too high\n");
1110 return AVERROR_INVALIDDATA;
1114 s->plane[0].xblen = get_interleaved_ue_golomb(gb);
1115 s->plane[0].yblen = get_interleaved_ue_golomb(gb);
1116 s->plane[0].xbsep = get_interleaved_ue_golomb(gb);
1117 s->plane[0].ybsep = get_interleaved_ue_golomb(gb);
1119 /*[DIRAC_STD] preset_block_params(index). Table 11.1 */
1120 s->plane[0].xblen = default_blen[idx-1];
1121 s->plane[0].yblen = default_blen[idx-1];
1122 s->plane[0].xbsep = 4 * idx;
1123 s->plane[0].ybsep = 4 * idx;
1125 /*[DIRAC_STD] 11.2.4 motion_data_dimensions()
1126 Calculated in function dirac_unpack_block_motion_data */
1128 if (s->plane[0].xblen % (1 << s->chroma_x_shift) != 0 ||
1129 s->plane[0].yblen % (1 << s->chroma_y_shift) != 0 ||
1130 !s->plane[0].xblen || !s->plane[0].yblen) {
1131 av_log(s->avctx, AV_LOG_ERROR,
1132 "invalid x/y block length (%d/%d) for x/y chroma shift (%d/%d)\n",
1133 s->plane[0].xblen, s->plane[0].yblen, s->chroma_x_shift, s->chroma_y_shift);
1134 return AVERROR_INVALIDDATA;
1136 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) {
1137 av_log(s->avctx, AV_LOG_ERROR, "Block separation too small\n");
1138 return AVERROR_INVALIDDATA;
1140 if (s->plane[0].xbsep > s->plane[0].xblen || s->plane[0].ybsep > s->plane[0].yblen) {
1141 av_log(s->avctx, AV_LOG_ERROR, "Block separation greater than size\n");
1142 return AVERROR_INVALIDDATA;
1144 if (FFMAX(s->plane[0].xblen, s->plane[0].yblen) > MAX_BLOCKSIZE) {
1145 av_log(s->avctx, AV_LOG_ERROR, "Unsupported large block size\n");
1146 return AVERROR_PATCHWELCOME;
1149 /*[DIRAC_STD] 11.2.5 Motion vector precision. motion_vector_precision()
1150 Read motion vector precision */
1151 s->mv_precision = get_interleaved_ue_golomb(gb);
1152 if (s->mv_precision > 3) {
1153 av_log(s->avctx, AV_LOG_ERROR, "MV precision finer than eighth-pel\n");
1154 return AVERROR_INVALIDDATA;
1157 /*[DIRAC_STD] 11.2.6 Global motion. global_motion()
1158 Read the global motion compensation parameters */
1159 s->globalmc_flag = get_bits1(gb);
1160 if (s->globalmc_flag) {
1161 memset(s->globalmc, 0, sizeof(s->globalmc));
1162 /* [DIRAC_STD] pan_tilt(gparams) */
1163 for (ref = 0; ref < s->num_refs; ref++) {
1164 if (get_bits1(gb)) {
1165 s->globalmc[ref].pan_tilt[0] = dirac_get_se_golomb(gb);
1166 s->globalmc[ref].pan_tilt[1] = dirac_get_se_golomb(gb);
1168 /* [DIRAC_STD] zoom_rotate_shear(gparams)
1169 zoom/rotation/shear parameters */
1170 if (get_bits1(gb)) {
1171 s->globalmc[ref].zrs_exp = get_interleaved_ue_golomb(gb);
1172 s->globalmc[ref].zrs[0][0] = dirac_get_se_golomb(gb);
1173 s->globalmc[ref].zrs[0][1] = dirac_get_se_golomb(gb);
1174 s->globalmc[ref].zrs[1][0] = dirac_get_se_golomb(gb);
1175 s->globalmc[ref].zrs[1][1] = dirac_get_se_golomb(gb);
1177 s->globalmc[ref].zrs[0][0] = 1;
1178 s->globalmc[ref].zrs[1][1] = 1;
1180 /* [DIRAC_STD] perspective(gparams) */
1181 if (get_bits1(gb)) {
1182 s->globalmc[ref].perspective_exp = get_interleaved_ue_golomb(gb);
1183 s->globalmc[ref].perspective[0] = dirac_get_se_golomb(gb);
1184 s->globalmc[ref].perspective[1] = dirac_get_se_golomb(gb);
1186 if (s->globalmc[ref].perspective_exp + (uint64_t)s->globalmc[ref].zrs_exp > 30) {
1187 return AVERROR_INVALIDDATA;
1193 /*[DIRAC_STD] 11.2.7 Picture prediction mode. prediction_mode()
1194 Picture prediction mode, not currently used. */
1195 if (get_interleaved_ue_golomb(gb)) {
1196 av_log(s->avctx, AV_LOG_ERROR, "Unknown picture prediction mode\n");
1197 return AVERROR_INVALIDDATA;
1200 /* [DIRAC_STD] 11.2.8 Reference picture weight. reference_picture_weights()
1201 just data read, weight calculation will be done later on. */
1202 s->weight_log2denom = 1;
1206 if (get_bits1(gb)) {
1207 s->weight_log2denom = get_interleaved_ue_golomb(gb);
1208 if (s->weight_log2denom < 1 || s->weight_log2denom > 8) {
1209 av_log(s->avctx, AV_LOG_ERROR, "weight_log2denom unsupported or invalid\n");
1210 s->weight_log2denom = 1;
1211 return AVERROR_INVALIDDATA;
1213 s->weight[0] = dirac_get_se_golomb(gb);
1214 if (s->num_refs == 2)
1215 s->weight[1] = dirac_get_se_golomb(gb);
1221 * Dirac Specification ->
1222 * 11.3 Wavelet transform data. wavelet_transform()
1224 static int dirac_unpack_idwt_params(DiracContext *s)
1226 GetBitContext *gb = &s->gb;
1230 #define CHECKEDREAD(dst, cond, errmsg) \
1231 tmp = get_interleaved_ue_golomb(gb); \
1233 av_log(s->avctx, AV_LOG_ERROR, errmsg); \
1234 return AVERROR_INVALIDDATA; \
1240 s->zero_res = s->num_refs ? get_bits1(gb) : 0;
1244 /*[DIRAC_STD] 11.3.1 Transform parameters. transform_parameters() */
1245 CHECKEDREAD(s->wavelet_idx, tmp > 6, "wavelet_idx is too big\n")
1247 CHECKEDREAD(s->wavelet_depth, tmp > MAX_DWT_LEVELS || tmp < 1, "invalid number of DWT decompositions\n")
1249 if (!s->low_delay) {
1250 /* Codeblock parameters (core syntax only) */
1251 if (get_bits1(gb)) {
1252 for (i = 0; i <= s->wavelet_depth; i++) {
1253 CHECKEDREAD(s->codeblock[i].width , tmp < 1 || tmp > (s->avctx->width >>s->wavelet_depth-i), "codeblock width invalid\n")
1254 CHECKEDREAD(s->codeblock[i].height, tmp < 1 || tmp > (s->avctx->height>>s->wavelet_depth-i), "codeblock height invalid\n")
1257 CHECKEDREAD(s->codeblock_mode, tmp > 1, "unknown codeblock mode\n")
1260 for (i = 0; i <= s->wavelet_depth; i++)
1261 s->codeblock[i].width = s->codeblock[i].height = 1;
1265 s->num_x = get_interleaved_ue_golomb(gb);
1266 s->num_y = get_interleaved_ue_golomb(gb);
1267 if (s->num_x * s->num_y == 0 || s->num_x * (uint64_t)s->num_y > INT_MAX ||
1268 s->num_x * (uint64_t)s->avctx->width > INT_MAX ||
1269 s->num_y * (uint64_t)s->avctx->height > INT_MAX
1271 av_log(s->avctx,AV_LOG_ERROR,"Invalid numx/y\n");
1272 s->num_x = s->num_y = 0;
1273 return AVERROR_INVALIDDATA;
1275 if (s->ld_picture) {
1276 s->lowdelay.bytes.num = get_interleaved_ue_golomb(gb);
1277 s->lowdelay.bytes.den = get_interleaved_ue_golomb(gb);
1278 if (s->lowdelay.bytes.den <= 0) {
1279 av_log(s->avctx,AV_LOG_ERROR,"Invalid lowdelay.bytes.den\n");
1280 return AVERROR_INVALIDDATA;
1282 } else if (s->hq_picture) {
1283 s->highquality.prefix_bytes = get_interleaved_ue_golomb(gb);
1284 s->highquality.size_scaler = get_interleaved_ue_golomb(gb);
1285 if (s->highquality.prefix_bytes >= INT_MAX / 8) {
1286 av_log(s->avctx,AV_LOG_ERROR,"too many prefix bytes\n");
1287 return AVERROR_INVALIDDATA;
1291 /* [DIRAC_STD] 11.3.5 Quantisation matrices (low-delay syntax). quant_matrix() */
1292 if (get_bits1(gb)) {
1293 av_log(s->avctx,AV_LOG_DEBUG,"Low Delay: Has Custom Quantization Matrix!\n");
1294 /* custom quantization matrix */
1295 for (level = 0; level < s->wavelet_depth; level++) {
1296 for (i = !!level; i < 4; i++) {
1297 s->lowdelay.quant[level][i] = get_interleaved_ue_golomb(gb);
1301 if (s->wavelet_depth > 4) {
1302 av_log(s->avctx,AV_LOG_ERROR,"Mandatory custom low delay matrix missing for depth %d\n", s->wavelet_depth);
1303 return AVERROR_INVALIDDATA;
1305 /* default quantization matrix */
1306 for (level = 0; level < s->wavelet_depth; level++)
1307 for (i = 0; i < 4; i++) {
1308 s->lowdelay.quant[level][i] = ff_dirac_default_qmat[s->wavelet_idx][level][i];
1309 /* haar with no shift differs for different depths */
1310 if (s->wavelet_idx == 3)
1311 s->lowdelay.quant[level][i] += 4*(s->wavelet_depth-1 - level);
1318 static inline int pred_sbsplit(uint8_t *sbsplit, int stride, int x, int y)
1320 static const uint8_t avgsplit[7] = { 0, 0, 1, 1, 1, 2, 2 };
1327 return sbsplit[-stride];
1329 return avgsplit[sbsplit[-1] + sbsplit[-stride] + sbsplit[-stride-1]];
1332 static inline int pred_block_mode(DiracBlock *block, int stride, int x, int y, int refmask)
1339 return block[-1].ref & refmask;
1341 return block[-stride].ref & refmask;
1343 /* return the majority */
1344 pred = (block[-1].ref & refmask) + (block[-stride].ref & refmask) + (block[-stride-1].ref & refmask);
1345 return (pred >> 1) & refmask;
1348 static inline void pred_block_dc(DiracBlock *block, int stride, int x, int y)
1352 memset(block->u.dc, 0, sizeof(block->u.dc));
1354 if (x && !(block[-1].ref & 3)) {
1355 for (i = 0; i < 3; i++)
1356 block->u.dc[i] += block[-1].u.dc[i];
1360 if (y && !(block[-stride].ref & 3)) {
1361 for (i = 0; i < 3; i++)
1362 block->u.dc[i] += block[-stride].u.dc[i];
1366 if (x && y && !(block[-1-stride].ref & 3)) {
1367 for (i = 0; i < 3; i++)
1368 block->u.dc[i] += block[-1-stride].u.dc[i];
1373 for (i = 0; i < 3; i++)
1374 block->u.dc[i] = (block->u.dc[i]+1)>>1;
1375 } else if (n == 3) {
1376 for (i = 0; i < 3; i++)
1377 block->u.dc[i] = divide3(block->u.dc[i]);
1381 static inline void pred_mv(DiracBlock *block, int stride, int x, int y, int ref)
1384 int refmask = ref+1;
1385 int mask = refmask | DIRAC_REF_MASK_GLOBAL; /* exclude gmc blocks */
1388 if (x && (block[-1].ref & mask) == refmask)
1389 pred[n++] = block[-1].u.mv[ref];
1391 if (y && (block[-stride].ref & mask) == refmask)
1392 pred[n++] = block[-stride].u.mv[ref];
1394 if (x && y && (block[-stride-1].ref & mask) == refmask)
1395 pred[n++] = block[-stride-1].u.mv[ref];
1399 block->u.mv[ref][0] = 0;
1400 block->u.mv[ref][1] = 0;
1403 block->u.mv[ref][0] = pred[0][0];
1404 block->u.mv[ref][1] = pred[0][1];
1407 block->u.mv[ref][0] = (pred[0][0] + pred[1][0] + 1) >> 1;
1408 block->u.mv[ref][1] = (pred[0][1] + pred[1][1] + 1) >> 1;
1411 block->u.mv[ref][0] = mid_pred(pred[0][0], pred[1][0], pred[2][0]);
1412 block->u.mv[ref][1] = mid_pred(pred[0][1], pred[1][1], pred[2][1]);
1417 static void global_mv(DiracContext *s, DiracBlock *block, int x, int y, int ref)
1419 int ez = s->globalmc[ref].zrs_exp;
1420 int ep = s->globalmc[ref].perspective_exp;
1421 int (*A)[2] = s->globalmc[ref].zrs;
1422 int *b = s->globalmc[ref].pan_tilt;
1423 int *c = s->globalmc[ref].perspective;
1425 int m = (1<<ep) - (c[0]*x + c[1]*y);
1426 int64_t mx = m * (int64_t)((A[0][0] * (int64_t)x + A[0][1]*(int64_t)y) + (1<<ez) * b[0]);
1427 int64_t my = m * (int64_t)((A[1][0] * (int64_t)x + A[1][1]*(int64_t)y) + (1<<ez) * b[1]);
1429 block->u.mv[ref][0] = (mx + (1<<(ez+ep))) >> (ez+ep);
1430 block->u.mv[ref][1] = (my + (1<<(ez+ep))) >> (ez+ep);
1433 static void decode_block_params(DiracContext *s, DiracArith arith[8], DiracBlock *block,
1434 int stride, int x, int y)
1438 block->ref = pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_REF1);
1439 block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF1);
1441 if (s->num_refs == 2) {
1442 block->ref |= pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_REF2);
1443 block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF2) << 1;
1447 pred_block_dc(block, stride, x, y);
1448 for (i = 0; i < 3; i++)
1449 block->u.dc[i] += (unsigned)dirac_get_arith_int(arith+1+i, CTX_DC_F1, CTX_DC_DATA);
1453 if (s->globalmc_flag) {
1454 block->ref |= pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_GLOBAL);
1455 block->ref ^= dirac_get_arith_bit(arith, CTX_GLOBAL_BLOCK) << 2;
1458 for (i = 0; i < s->num_refs; i++)
1459 if (block->ref & (i+1)) {
1460 if (block->ref & DIRAC_REF_MASK_GLOBAL) {
1461 global_mv(s, block, x, y, i);
1463 pred_mv(block, stride, x, y, i);
1464 block->u.mv[i][0] += (unsigned)dirac_get_arith_int(arith + 4 + 2 * i, CTX_MV_F1, CTX_MV_DATA);
1465 block->u.mv[i][1] += (unsigned)dirac_get_arith_int(arith + 5 + 2 * i, CTX_MV_F1, CTX_MV_DATA);
1471 * Copies the current block to the other blocks covered by the current superblock split mode
1473 static void propagate_block_data(DiracBlock *block, int stride, int size)
1476 DiracBlock *dst = block;
1478 for (x = 1; x < size; x++)
1481 for (y = 1; y < size; y++) {
1483 for (x = 0; x < size; x++)
1489 * Dirac Specification ->
1490 * 12. Block motion data syntax
1492 static int dirac_unpack_block_motion_data(DiracContext *s)
1494 GetBitContext *gb = &s->gb;
1495 uint8_t *sbsplit = s->sbsplit;
1497 DiracArith arith[8];
1501 /* [DIRAC_STD] 11.2.4 and 12.2.1 Number of blocks and superblocks */
1502 s->sbwidth = DIVRNDUP(s->seq.width, 4*s->plane[0].xbsep);
1503 s->sbheight = DIVRNDUP(s->seq.height, 4*s->plane[0].ybsep);
1504 s->blwidth = 4 * s->sbwidth;
1505 s->blheight = 4 * s->sbheight;
1507 /* [DIRAC_STD] 12.3.1 Superblock splitting modes. superblock_split_modes()
1508 decode superblock split modes */
1509 ff_dirac_init_arith_decoder(arith, gb, get_interleaved_ue_golomb(gb)); /* get_interleaved_ue_golomb(gb) is the length */
1510 for (y = 0; y < s->sbheight; y++) {
1511 for (x = 0; x < s->sbwidth; x++) {
1512 unsigned int split = dirac_get_arith_uint(arith, CTX_SB_F1, CTX_SB_DATA);
1514 return AVERROR_INVALIDDATA;
1515 sbsplit[x] = (split + pred_sbsplit(sbsplit+x, s->sbwidth, x, y)) % 3;
1517 sbsplit += s->sbwidth;
1520 /* setup arith decoding */
1521 ff_dirac_init_arith_decoder(arith, gb, get_interleaved_ue_golomb(gb));
1522 for (i = 0; i < s->num_refs; i++) {
1523 ff_dirac_init_arith_decoder(arith + 4 + 2 * i, gb, get_interleaved_ue_golomb(gb));
1524 ff_dirac_init_arith_decoder(arith + 5 + 2 * i, gb, get_interleaved_ue_golomb(gb));
1526 for (i = 0; i < 3; i++)
1527 ff_dirac_init_arith_decoder(arith+1+i, gb, get_interleaved_ue_golomb(gb));
1529 for (y = 0; y < s->sbheight; y++)
1530 for (x = 0; x < s->sbwidth; x++) {
1531 int blkcnt = 1 << s->sbsplit[y * s->sbwidth + x];
1532 int step = 4 >> s->sbsplit[y * s->sbwidth + x];
1534 for (q = 0; q < blkcnt; q++)
1535 for (p = 0; p < blkcnt; p++) {
1536 int bx = 4 * x + p*step;
1537 int by = 4 * y + q*step;
1538 DiracBlock *block = &s->blmotion[by*s->blwidth + bx];
1539 decode_block_params(s, arith, block, s->blwidth, bx, by);
1540 propagate_block_data(block, s->blwidth, step);
1547 static int weight(int i, int blen, int offset)
1549 #define ROLLOFF(i) offset == 1 ? ((i) ? 5 : 3) : \
1550 (1 + (6*(i) + offset - 1) / (2*offset - 1))
1554 else if (i > blen-1 - 2*offset)
1555 return ROLLOFF(blen-1 - i);
1559 static void init_obmc_weight_row(Plane *p, uint8_t *obmc_weight, int stride,
1560 int left, int right, int wy)
1563 for (x = 0; left && x < p->xblen >> 1; x++)
1564 obmc_weight[x] = wy*8;
1565 for (; x < p->xblen >> right; x++)
1566 obmc_weight[x] = wy*weight(x, p->xblen, p->xoffset);
1567 for (; x < p->xblen; x++)
1568 obmc_weight[x] = wy*8;
1569 for (; x < stride; x++)
1573 static void init_obmc_weight(Plane *p, uint8_t *obmc_weight, int stride,
1574 int left, int right, int top, int bottom)
1577 for (y = 0; top && y < p->yblen >> 1; y++) {
1578 init_obmc_weight_row(p, obmc_weight, stride, left, right, 8);
1579 obmc_weight += stride;
1581 for (; y < p->yblen >> bottom; y++) {
1582 int wy = weight(y, p->yblen, p->yoffset);
1583 init_obmc_weight_row(p, obmc_weight, stride, left, right, wy);
1584 obmc_weight += stride;
1586 for (; y < p->yblen; y++) {
1587 init_obmc_weight_row(p, obmc_weight, stride, left, right, 8);
1588 obmc_weight += stride;
1592 static void init_obmc_weights(DiracContext *s, Plane *p, int by)
1595 int bottom = by == s->blheight-1;
1597 /* don't bother re-initing for rows 2 to blheight-2, the weights don't change */
1598 if (top || bottom || by == 1) {
1599 init_obmc_weight(p, s->obmc_weight[0], MAX_BLOCKSIZE, 1, 0, top, bottom);
1600 init_obmc_weight(p, s->obmc_weight[1], MAX_BLOCKSIZE, 0, 0, top, bottom);
1601 init_obmc_weight(p, s->obmc_weight[2], MAX_BLOCKSIZE, 0, 1, top, bottom);
1605 static const uint8_t epel_weights[4][4][4] = {
1625 * For block x,y, determine which of the hpel planes to do bilinear
1626 * interpolation from and set src[] to the location in each hpel plane
1629 * @return the index of the put_dirac_pixels_tab function to use
1630 * 0 for 1 plane (fpel,hpel), 1 for 2 planes (qpel), 2 for 4 planes (qpel), and 3 for epel
1632 static int mc_subpel(DiracContext *s, DiracBlock *block, const uint8_t *src[5],
1633 int x, int y, int ref, int plane)
1635 Plane *p = &s->plane[plane];
1636 uint8_t **ref_hpel = s->ref_pics[ref]->hpel[plane];
1637 int motion_x = block->u.mv[ref][0];
1638 int motion_y = block->u.mv[ref][1];
1639 int mx, my, i, epel, nplanes = 0;
1642 motion_x >>= s->chroma_x_shift;
1643 motion_y >>= s->chroma_y_shift;
1646 mx = motion_x & ~(-1U << s->mv_precision);
1647 my = motion_y & ~(-1U << s->mv_precision);
1648 motion_x >>= s->mv_precision;
1649 motion_y >>= s->mv_precision;
1650 /* normalize subpel coordinates to epel */
1651 /* TODO: template this function? */
1652 mx <<= 3 - s->mv_precision;
1653 my <<= 3 - s->mv_precision;
1662 src[0] = ref_hpel[(my>>1)+(mx>>2)] + y*p->stride + x;
1666 for (i = 0; i < 4; i++)
1667 src[i] = ref_hpel[i] + y*p->stride + x;
1669 /* if we're interpolating in the right/bottom halves, adjust the planes as needed
1670 we increment x/y because the edge changes for half of the pixels */
1677 src[0] += p->stride;
1678 src[1] += p->stride;
1686 /* check if we really only need 2 planes since either mx or my is
1687 a hpel position. (epel weights of 0 handle this there) */
1689 /* mx == 0: average [0] and [2]
1690 mx == 4: average [1] and [3] */
1691 src[!mx] = src[2 + !!mx];
1693 } else if (!(my&3)) {
1694 src[0] = src[(my>>1) ];
1695 src[1] = src[(my>>1)+1];
1699 /* adjust the ordering if needed so the weights work */
1701 FFSWAP(const uint8_t *, src[0], src[1]);
1702 FFSWAP(const uint8_t *, src[2], src[3]);
1705 FFSWAP(const uint8_t *, src[0], src[2]);
1706 FFSWAP(const uint8_t *, src[1], src[3]);
1708 src[4] = epel_weights[my&3][mx&3];
1712 /* fixme: v/h _edge_pos */
1713 if (x + p->xblen > p->width +EDGE_WIDTH/2 ||
1714 y + p->yblen > p->height+EDGE_WIDTH/2 ||
1716 for (i = 0; i < nplanes; i++) {
1717 s->vdsp.emulated_edge_mc(s->edge_emu_buffer[i], src[i],
1718 p->stride, p->stride,
1719 p->xblen, p->yblen, x, y,
1720 p->width+EDGE_WIDTH/2, p->height+EDGE_WIDTH/2);
1721 src[i] = s->edge_emu_buffer[i];
1724 return (nplanes>>1) + epel;
1727 static void add_dc(uint16_t *dst, int dc, int stride,
1728 uint8_t *obmc_weight, int xblen, int yblen)
1733 for (y = 0; y < yblen; y++) {
1734 for (x = 0; x < xblen; x += 2) {
1735 dst[x ] += dc * obmc_weight[x ];
1736 dst[x+1] += dc * obmc_weight[x+1];
1739 obmc_weight += MAX_BLOCKSIZE;
1743 static void block_mc(DiracContext *s, DiracBlock *block,
1744 uint16_t *mctmp, uint8_t *obmc_weight,
1745 int plane, int dstx, int dsty)
1747 Plane *p = &s->plane[plane];
1748 const uint8_t *src[5];
1751 switch (block->ref&3) {
1753 add_dc(mctmp, block->u.dc[plane], p->stride, obmc_weight, p->xblen, p->yblen);
1757 idx = mc_subpel(s, block, src, dstx, dsty, (block->ref&3)-1, plane);
1758 s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1760 s->weight_func(s->mcscratch, p->stride, s->weight_log2denom,
1761 s->weight[0] + s->weight[1], p->yblen);
1764 idx = mc_subpel(s, block, src, dstx, dsty, 0, plane);
1765 s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1766 idx = mc_subpel(s, block, src, dstx, dsty, 1, plane);
1767 if (s->biweight_func) {
1768 /* fixme: +32 is a quick hack */
1769 s->put_pixels_tab[idx](s->mcscratch + 32, src, p->stride, p->yblen);
1770 s->biweight_func(s->mcscratch, s->mcscratch+32, p->stride, s->weight_log2denom,
1771 s->weight[0], s->weight[1], p->yblen);
1773 s->avg_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1776 s->add_obmc(mctmp, s->mcscratch, p->stride, obmc_weight, p->yblen);
1779 static void mc_row(DiracContext *s, DiracBlock *block, uint16_t *mctmp, int plane, int dsty)
1781 Plane *p = &s->plane[plane];
1782 int x, dstx = p->xbsep - p->xoffset;
1784 block_mc(s, block, mctmp, s->obmc_weight[0], plane, -p->xoffset, dsty);
1787 for (x = 1; x < s->blwidth-1; x++) {
1788 block_mc(s, block+x, mctmp, s->obmc_weight[1], plane, dstx, dsty);
1792 block_mc(s, block+x, mctmp, s->obmc_weight[2], plane, dstx, dsty);
1795 static void select_dsp_funcs(DiracContext *s, int width, int height, int xblen, int yblen)
1803 memcpy(s->put_pixels_tab, s->diracdsp.put_dirac_pixels_tab[idx], sizeof(s->put_pixels_tab));
1804 memcpy(s->avg_pixels_tab, s->diracdsp.avg_dirac_pixels_tab[idx], sizeof(s->avg_pixels_tab));
1805 s->add_obmc = s->diracdsp.add_dirac_obmc[idx];
1806 if (s->weight_log2denom > 1 || s->weight[0] != 1 || s->weight[1] != 1) {
1807 s->weight_func = s->diracdsp.weight_dirac_pixels_tab[idx];
1808 s->biweight_func = s->diracdsp.biweight_dirac_pixels_tab[idx];
1810 s->weight_func = NULL;
1811 s->biweight_func = NULL;
1815 static int interpolate_refplane(DiracContext *s, DiracFrame *ref, int plane, int width, int height)
1817 /* chroma allocates an edge of 8 when subsampled
1818 which for 4:2:2 means an h edge of 16 and v edge of 8
1819 just use 8 for everything for the moment */
1820 int i, edge = EDGE_WIDTH/2;
1822 ref->hpel[plane][0] = ref->avframe->data[plane];
1823 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 */
1825 /* no need for hpel if we only have fpel vectors */
1826 if (!s->mv_precision)
1829 for (i = 1; i < 4; i++) {
1830 if (!ref->hpel_base[plane][i])
1831 ref->hpel_base[plane][i] = av_malloc((height+2*edge) * ref->avframe->linesize[plane] + 32);
1832 if (!ref->hpel_base[plane][i]) {
1833 return AVERROR(ENOMEM);
1835 /* we need to be 16-byte aligned even for chroma */
1836 ref->hpel[plane][i] = ref->hpel_base[plane][i] + edge*ref->avframe->linesize[plane] + 16;
1839 if (!ref->interpolated[plane]) {
1840 s->diracdsp.dirac_hpel_filter(ref->hpel[plane][1], ref->hpel[plane][2],
1841 ref->hpel[plane][3], ref->hpel[plane][0],
1842 ref->avframe->linesize[plane], width, height);
1843 s->mpvencdsp.draw_edges(ref->hpel[plane][1], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1844 s->mpvencdsp.draw_edges(ref->hpel[plane][2], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1845 s->mpvencdsp.draw_edges(ref->hpel[plane][3], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1847 ref->interpolated[plane] = 1;
1853 * Dirac Specification ->
1854 * 13.0 Transform data syntax. transform_data()
1856 static int dirac_decode_frame_internal(DiracContext *s)
1859 int y, i, comp, dsty;
1863 /* [DIRAC_STD] 13.5.1 low_delay_transform_data() */
1864 if (!s->hq_picture) {
1865 for (comp = 0; comp < 3; comp++) {
1866 Plane *p = &s->plane[comp];
1867 memset(p->idwt.buf, 0, p->idwt.stride * p->idwt.height);
1871 if ((ret = decode_lowdelay(s)) < 0)
1876 for (comp = 0; comp < 3; comp++) {
1877 Plane *p = &s->plane[comp];
1878 uint8_t *frame = s->current_picture->avframe->data[comp];
1880 /* FIXME: small resolutions */
1881 for (i = 0; i < 4; i++)
1882 s->edge_emu_buffer[i] = s->edge_emu_buffer_base + i*FFALIGN(p->width, 16);
1884 if (!s->zero_res && !s->low_delay)
1886 memset(p->idwt.buf, 0, p->idwt.stride * p->idwt.height);
1887 ret = decode_component(s, comp); /* [DIRAC_STD] 13.4.1 core_transform_data() */
1891 ret = ff_spatial_idwt_init(&d, &p->idwt, s->wavelet_idx+2,
1892 s->wavelet_depth, s->bit_depth);
1896 if (!s->num_refs) { /* intra */
1897 for (y = 0; y < p->height; y += 16) {
1898 int idx = (s->bit_depth - 8) >> 1;
1899 ff_spatial_idwt_slice2(&d, y+16); /* decode */
1900 s->diracdsp.put_signed_rect_clamped[idx](frame + y*p->stride,
1902 p->idwt.buf + y*p->idwt.stride,
1903 p->idwt.stride, p->width, 16);
1905 } else { /* inter */
1906 int rowheight = p->ybsep*p->stride;
1908 select_dsp_funcs(s, p->width, p->height, p->xblen, p->yblen);
1910 for (i = 0; i < s->num_refs; i++) {
1911 int ret = interpolate_refplane(s, s->ref_pics[i], comp, p->width, p->height);
1916 memset(s->mctmp, 0, 4*p->yoffset*p->stride);
1919 for (y = 0; y < s->blheight; y++) {
1921 start = FFMAX(dsty, 0);
1922 uint16_t *mctmp = s->mctmp + y*rowheight;
1923 DiracBlock *blocks = s->blmotion + y*s->blwidth;
1925 init_obmc_weights(s, p, y);
1927 if (y == s->blheight-1 || start+p->ybsep > p->height)
1928 h = p->height - start;
1930 h = p->ybsep - (start - dsty);
1934 memset(mctmp+2*p->yoffset*p->stride, 0, 2*rowheight);
1935 mc_row(s, blocks, mctmp, comp, dsty);
1937 mctmp += (start - dsty)*p->stride + p->xoffset;
1938 ff_spatial_idwt_slice2(&d, start + h); /* decode */
1939 /* NOTE: add_rect_clamped hasn't been templated hence the shifts.
1940 * idwt.stride is passed as pixels, not in bytes as in the rest of the decoder */
1941 s->diracdsp.add_rect_clamped(frame + start*p->stride, mctmp, p->stride,
1942 (int16_t*)(p->idwt.buf) + start*(p->idwt.stride >> 1), (p->idwt.stride >> 1), p->width, h);
1953 static int get_buffer_with_edge(AVCodecContext *avctx, AVFrame *f, int flags)
1956 int chroma_x_shift, chroma_y_shift;
1957 ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift,
1962 f->width = avctx->width + 2 * EDGE_WIDTH;
1963 f->height = avctx->height + 2 * EDGE_WIDTH + 2;
1964 ret = ff_get_buffer(avctx, f, flags);
1968 for (i = 0; f->data[i]; i++) {
1969 int offset = (EDGE_WIDTH >> (i && i<3 ? chroma_y_shift : 0)) *
1970 f->linesize[i] + 32;
1971 f->data[i] += offset;
1973 f->width = avctx->width;
1974 f->height = avctx->height;
1980 * Dirac Specification ->
1981 * 11.1.1 Picture Header. picture_header()
1983 static int dirac_decode_picture_header(DiracContext *s)
1985 unsigned retire, picnum;
1987 int64_t refdist, refnum;
1988 GetBitContext *gb = &s->gb;
1990 /* [DIRAC_STD] 11.1.1 Picture Header. picture_header() PICTURE_NUM */
1991 picnum = s->current_picture->avframe->display_picture_number = get_bits_long(gb, 32);
1994 av_log(s->avctx,AV_LOG_DEBUG,"PICTURE_NUM: %d\n",picnum);
1996 /* if this is the first keyframe after a sequence header, start our
1997 reordering from here */
1998 if (s->frame_number < 0)
1999 s->frame_number = picnum;
2001 s->ref_pics[0] = s->ref_pics[1] = NULL;
2002 for (i = 0; i < s->num_refs; i++) {
2003 refnum = (picnum + dirac_get_se_golomb(gb)) & 0xFFFFFFFF;
2004 refdist = INT64_MAX;
2006 /* find the closest reference to the one we want */
2007 /* Jordi: this is needed if the referenced picture hasn't yet arrived */
2008 for (j = 0; j < MAX_REFERENCE_FRAMES && refdist; j++)
2009 if (s->ref_frames[j]
2010 && FFABS(s->ref_frames[j]->avframe->display_picture_number - refnum) < refdist) {
2011 s->ref_pics[i] = s->ref_frames[j];
2012 refdist = FFABS(s->ref_frames[j]->avframe->display_picture_number - refnum);
2015 if (!s->ref_pics[i] || refdist)
2016 av_log(s->avctx, AV_LOG_DEBUG, "Reference not found\n");
2018 /* if there were no references at all, allocate one */
2019 if (!s->ref_pics[i])
2020 for (j = 0; j < MAX_FRAMES; j++)
2021 if (!s->all_frames[j].avframe->data[0]) {
2022 s->ref_pics[i] = &s->all_frames[j];
2023 ret = get_buffer_with_edge(s->avctx, s->ref_pics[i]->avframe, AV_GET_BUFFER_FLAG_REF);
2029 if (!s->ref_pics[i]) {
2030 av_log(s->avctx, AV_LOG_ERROR, "Reference could not be allocated\n");
2031 return AVERROR_INVALIDDATA;
2036 /* retire the reference frames that are not used anymore */
2037 if (s->current_picture->reference) {
2038 retire = (picnum + dirac_get_se_golomb(gb)) & 0xFFFFFFFF;
2039 if (retire != picnum) {
2040 DiracFrame *retire_pic = remove_frame(s->ref_frames, retire);
2043 retire_pic->reference &= DELAYED_PIC_REF;
2045 av_log(s->avctx, AV_LOG_DEBUG, "Frame to retire not found\n");
2048 /* if reference array is full, remove the oldest as per the spec */
2049 while (add_frame(s->ref_frames, MAX_REFERENCE_FRAMES, s->current_picture)) {
2050 av_log(s->avctx, AV_LOG_ERROR, "Reference frame overflow\n");
2051 remove_frame(s->ref_frames, s->ref_frames[0]->avframe->display_picture_number)->reference &= DELAYED_PIC_REF;
2056 ret = dirac_unpack_prediction_parameters(s); /* [DIRAC_STD] 11.2 Picture Prediction Data. picture_prediction() */
2059 ret = dirac_unpack_block_motion_data(s); /* [DIRAC_STD] 12. Block motion data syntax */
2063 ret = dirac_unpack_idwt_params(s); /* [DIRAC_STD] 11.3 Wavelet transform data */
2071 static int get_delayed_pic(DiracContext *s, AVFrame *picture, int *got_frame)
2073 DiracFrame *out = s->delay_frames[0];
2077 /* find frame with lowest picture number */
2078 for (i = 1; s->delay_frames[i]; i++)
2079 if (s->delay_frames[i]->avframe->display_picture_number < out->avframe->display_picture_number) {
2080 out = s->delay_frames[i];
2084 for (i = out_idx; s->delay_frames[i]; i++)
2085 s->delay_frames[i] = s->delay_frames[i+1];
2088 out->reference ^= DELAYED_PIC_REF;
2089 if((ret = av_frame_ref(picture, out->avframe)) < 0)
2098 * Dirac Specification ->
2099 * 9.6 Parse Info Header Syntax. parse_info()
2100 * 4 byte start code + byte parse code + 4 byte size + 4 byte previous size
2102 #define DATA_UNIT_HEADER_SIZE 13
2104 /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3
2105 inside the function parse_sequence() */
2106 static int dirac_decode_data_unit(AVCodecContext *avctx, const uint8_t *buf, int size)
2108 DiracContext *s = avctx->priv_data;
2109 DiracFrame *pic = NULL;
2110 AVDiracSeqHeader *dsh;
2115 if (size < DATA_UNIT_HEADER_SIZE)
2116 return AVERROR_INVALIDDATA;
2118 parse_code = buf[4];
2120 init_get_bits(&s->gb, &buf[13], 8*(size - DATA_UNIT_HEADER_SIZE));
2122 if (parse_code == DIRAC_PCODE_SEQ_HEADER) {
2123 if (s->seen_sequence_header)
2126 /* [DIRAC_STD] 10. Sequence header */
2127 ret = av_dirac_parse_sequence_header(&dsh, buf + DATA_UNIT_HEADER_SIZE, size - DATA_UNIT_HEADER_SIZE, avctx);
2129 av_log(avctx, AV_LOG_ERROR, "error parsing sequence header");
2133 if (CALC_PADDING((int64_t)dsh->width, MAX_DWT_LEVELS) * CALC_PADDING((int64_t)dsh->height, MAX_DWT_LEVELS) > avctx->max_pixels)
2134 ret = AVERROR(ERANGE);
2136 ret = ff_set_dimensions(avctx, dsh->width, dsh->height);
2142 ff_set_sar(avctx, dsh->sample_aspect_ratio);
2143 avctx->pix_fmt = dsh->pix_fmt;
2144 avctx->color_range = dsh->color_range;
2145 avctx->color_trc = dsh->color_trc;
2146 avctx->color_primaries = dsh->color_primaries;
2147 avctx->colorspace = dsh->colorspace;
2148 avctx->profile = dsh->profile;
2149 avctx->level = dsh->level;
2150 avctx->framerate = dsh->framerate;
2151 s->bit_depth = dsh->bit_depth;
2152 s->version.major = dsh->version.major;
2153 s->version.minor = dsh->version.minor;
2157 s->pshift = s->bit_depth > 8;
2159 ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,
2161 &s->chroma_y_shift);
2165 ret = alloc_sequence_buffers(s);
2169 s->seen_sequence_header = 1;
2170 } else if (parse_code == DIRAC_PCODE_END_SEQ) { /* [DIRAC_STD] End of Sequence */
2171 free_sequence_buffers(s);
2172 s->seen_sequence_header = 0;
2173 } else if (parse_code == DIRAC_PCODE_AUX) {
2174 if (buf[13] == 1) { /* encoder implementation/version */
2176 /* versions older than 1.0.8 don't store quant delta for
2177 subbands with only one codeblock */
2178 if (sscanf(buf+14, "Schroedinger %d.%d.%d", ver, ver+1, ver+2) == 3)
2179 if (ver[0] == 1 && ver[1] == 0 && ver[2] <= 7)
2180 s->old_delta_quant = 1;
2182 } else if (parse_code & 0x8) { /* picture data unit */
2183 if (!s->seen_sequence_header) {
2184 av_log(avctx, AV_LOG_DEBUG, "Dropping frame without sequence header\n");
2185 return AVERROR_INVALIDDATA;
2188 /* find an unused frame */
2189 for (i = 0; i < MAX_FRAMES; i++)
2190 if (s->all_frames[i].avframe->data[0] == NULL)
2191 pic = &s->all_frames[i];
2193 av_log(avctx, AV_LOG_ERROR, "framelist full\n");
2194 return AVERROR_INVALIDDATA;
2197 av_frame_unref(pic->avframe);
2199 /* [DIRAC_STD] Defined in 9.6.1 ... */
2200 tmp = parse_code & 0x03; /* [DIRAC_STD] num_refs() */
2202 av_log(avctx, AV_LOG_ERROR, "num_refs of 3\n");
2203 return AVERROR_INVALIDDATA;
2206 s->is_arith = (parse_code & 0x48) == 0x08; /* [DIRAC_STD] using_ac() */
2207 s->low_delay = (parse_code & 0x88) == 0x88; /* [DIRAC_STD] is_low_delay() */
2208 s->core_syntax = (parse_code & 0x88) == 0x08; /* [DIRAC_STD] is_core_syntax() */
2209 s->ld_picture = (parse_code & 0xF8) == 0xC8; /* [DIRAC_STD] is_ld_picture() */
2210 s->hq_picture = (parse_code & 0xF8) == 0xE8; /* [DIRAC_STD] is_hq_picture() */
2211 s->dc_prediction = (parse_code & 0x28) == 0x08; /* [DIRAC_STD] using_dc_prediction() */
2212 pic->reference = (parse_code & 0x0C) == 0x0C; /* [DIRAC_STD] is_reference() */
2213 pic->avframe->key_frame = s->num_refs == 0; /* [DIRAC_STD] is_intra() */
2214 pic->avframe->pict_type = s->num_refs + 1; /* Definition of AVPictureType in avutil.h */
2216 /* VC-2 Low Delay has a different parse code than the Dirac Low Delay */
2217 if (s->version.minor == 2 && parse_code == 0x88)
2220 if (s->low_delay && !(s->ld_picture || s->hq_picture) ) {
2221 av_log(avctx, AV_LOG_ERROR, "Invalid low delay flag\n");
2222 return AVERROR_INVALIDDATA;
2225 if ((ret = get_buffer_with_edge(avctx, pic->avframe, (parse_code & 0x0C) == 0x0C ? AV_GET_BUFFER_FLAG_REF : 0)) < 0)
2227 s->current_picture = pic;
2228 s->plane[0].stride = pic->avframe->linesize[0];
2229 s->plane[1].stride = pic->avframe->linesize[1];
2230 s->plane[2].stride = pic->avframe->linesize[2];
2232 if (alloc_buffers(s, FFMAX3(FFABS(s->plane[0].stride), FFABS(s->plane[1].stride), FFABS(s->plane[2].stride))) < 0)
2233 return AVERROR(ENOMEM);
2235 /* [DIRAC_STD] 11.1 Picture parse. picture_parse() */
2236 ret = dirac_decode_picture_header(s);
2240 /* [DIRAC_STD] 13.0 Transform data syntax. transform_data() */
2241 ret = dirac_decode_frame_internal(s);
2248 static int dirac_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *pkt)
2250 DiracContext *s = avctx->priv_data;
2251 AVFrame *picture = data;
2252 uint8_t *buf = pkt->data;
2253 int buf_size = pkt->size;
2256 unsigned data_unit_size;
2258 /* release unused frames */
2259 for (i = 0; i < MAX_FRAMES; i++)
2260 if (s->all_frames[i].avframe->data[0] && !s->all_frames[i].reference) {
2261 av_frame_unref(s->all_frames[i].avframe);
2262 memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated));
2265 s->current_picture = NULL;
2268 /* end of stream, so flush delayed pics */
2270 return get_delayed_pic(s, (AVFrame *)data, got_frame);
2273 /*[DIRAC_STD] Here starts the code from parse_info() defined in 9.6
2274 [DIRAC_STD] PARSE_INFO_PREFIX = "BBCD" as defined in ISO/IEC 646
2275 BBCD start code search */
2276 for (; buf_idx + DATA_UNIT_HEADER_SIZE < buf_size; buf_idx++) {
2277 if (buf[buf_idx ] == 'B' && buf[buf_idx+1] == 'B' &&
2278 buf[buf_idx+2] == 'C' && buf[buf_idx+3] == 'D')
2281 /* BBCD found or end of data */
2282 if (buf_idx + DATA_UNIT_HEADER_SIZE >= buf_size)
2285 data_unit_size = AV_RB32(buf+buf_idx+5);
2286 if (data_unit_size > buf_size - buf_idx || !data_unit_size) {
2287 if(data_unit_size > buf_size - buf_idx)
2288 av_log(s->avctx, AV_LOG_ERROR,
2289 "Data unit with size %d is larger than input buffer, discarding\n",
2294 /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3 inside the function parse_sequence() */
2295 ret = dirac_decode_data_unit(avctx, buf+buf_idx, data_unit_size);
2298 av_log(s->avctx, AV_LOG_ERROR,"Error in dirac_decode_data_unit\n");
2301 buf_idx += data_unit_size;
2304 if (!s->current_picture)
2307 if (s->current_picture->avframe->display_picture_number > s->frame_number) {
2308 DiracFrame *delayed_frame = remove_frame(s->delay_frames, s->frame_number);
2310 s->current_picture->reference |= DELAYED_PIC_REF;
2312 if (add_frame(s->delay_frames, MAX_DELAY, s->current_picture)) {
2313 int min_num = s->delay_frames[0]->avframe->display_picture_number;
2314 /* Too many delayed frames, so we display the frame with the lowest pts */
2315 av_log(avctx, AV_LOG_ERROR, "Delay frame overflow\n");
2317 for (i = 1; s->delay_frames[i]; i++)
2318 if (s->delay_frames[i]->avframe->display_picture_number < min_num)
2319 min_num = s->delay_frames[i]->avframe->display_picture_number;
2321 delayed_frame = remove_frame(s->delay_frames, min_num);
2322 add_frame(s->delay_frames, MAX_DELAY, s->current_picture);
2325 if (delayed_frame) {
2326 delayed_frame->reference ^= DELAYED_PIC_REF;
2327 if((ret=av_frame_ref(data, delayed_frame->avframe)) < 0)
2331 } else if (s->current_picture->avframe->display_picture_number == s->frame_number) {
2332 /* The right frame at the right time :-) */
2333 if((ret=av_frame_ref(data, s->current_picture->avframe)) < 0)
2339 s->frame_number = picture->display_picture_number + 1LL;
2344 AVCodec ff_dirac_decoder = {
2346 .long_name = NULL_IF_CONFIG_SMALL("BBC Dirac VC-2"),
2347 .type = AVMEDIA_TYPE_VIDEO,
2348 .id = AV_CODEC_ID_DIRAC,
2349 .priv_data_size = sizeof(DiracContext),
2350 .init = dirac_decode_init,
2351 .close = dirac_decode_end,
2352 .decode = dirac_decode_frame,
2353 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_DR1,
2354 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
2355 .flush = dirac_decode_flush,