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/thread.h"
32 #include "bytestream.h"
35 #include "dirac_arith.h"
36 #include "dirac_vlc.h"
37 #include "mpeg12data.h"
38 #include "libavcodec/mpegvideo.h"
39 #include "mpegvideoencdsp.h"
40 #include "dirac_dwt.h"
47 * The spec limits this to 3 for frame coding, but in practice can be as high as 6
49 #define MAX_REFERENCE_FRAMES 8
50 #define MAX_DELAY 5 /* limit for main profile for frame coding (TODO: field coding) */
51 #define MAX_FRAMES (MAX_REFERENCE_FRAMES + MAX_DELAY + 1)
52 #define MAX_QUANT 255 /* max quant for VC-2 */
53 #define MAX_BLOCKSIZE 32 /* maximum xblen/yblen we support */
56 * DiracBlock->ref flags, if set then the block does MC from the given ref
58 #define DIRAC_REF_MASK_REF1 1
59 #define DIRAC_REF_MASK_REF2 2
60 #define DIRAC_REF_MASK_GLOBAL 4
63 * Value of Picture.reference when Picture is not a reference picture, but
64 * is held for delayed output.
66 #define DELAYED_PIC_REF 4
68 #define CALC_PADDING(size, depth) \
69 (((size + (1 << depth) - 1) >> depth) << depth)
71 #define DIVRNDUP(a, b) (((a) + (b) - 1) / (b))
75 int interpolated[3]; /* 1 if hpel[] is valid */
77 uint8_t *hpel_base[3][4];
85 } u; /* anonymous unions aren't in C99 :( */
89 typedef struct SubBand {
92 int stride; /* in bytes */
98 struct SubBand *parent;
102 const uint8_t *coeff_data;
105 typedef struct Plane {
115 /* block separation (block n+1 starts after this many pixels in block n) */
118 /* amount of overspill on each edge (half of the overlap between blocks) */
122 SubBand band[MAX_DWT_LEVELS][4];
125 /* Used by Low Delay and High Quality profiles */
126 typedef struct DiracSlice {
133 typedef struct DiracContext {
134 AVCodecContext *avctx;
135 MpegvideoEncDSPContext mpvencdsp;
136 VideoDSPContext vdsp;
137 DiracDSPContext diracdsp;
138 DiracGolombLUT *reader_ctx;
139 DiracVersionInfo version;
141 AVDiracSeqHeader seq;
142 int seen_sequence_header;
143 int frame_number; /* number of the next frame to display */
148 int bit_depth; /* bit depth */
149 int pshift; /* pixel shift = bit_depth > 8 */
151 int zero_res; /* zero residue flag */
152 int is_arith; /* whether coeffs use arith or golomb coding */
153 int core_syntax; /* use core syntax only */
154 int low_delay; /* use the low delay syntax */
155 int hq_picture; /* high quality picture, enables low_delay */
156 int ld_picture; /* use low delay picture, turns on low_delay */
157 int dc_prediction; /* has dc prediction */
158 int globalmc_flag; /* use global motion compensation */
159 int num_refs; /* number of reference pictures */
161 /* wavelet decoding */
162 unsigned wavelet_depth; /* depth of the IDWT */
163 unsigned wavelet_idx;
166 * schroedinger older than 1.0.8 doesn't store
167 * quant delta if only one codebook exists in a band
169 unsigned old_delta_quant;
170 unsigned codeblock_mode;
172 unsigned num_x; /* number of horizontal slices */
173 unsigned num_y; /* number of vertical slices */
175 uint8_t *thread_buf; /* Per-thread buffer for coefficient storage */
176 int threads_num_buf; /* Current # of buffers allocated */
177 int thread_buf_size; /* Each thread has a buffer this size */
179 DiracSlice *slice_params_buf;
180 int slice_params_num_buf;
185 } codeblock[MAX_DWT_LEVELS+1];
188 AVRational bytes; /* average bytes per slice */
189 uint8_t quant[MAX_DWT_LEVELS][4]; /* [DIRAC_STD] E.1 */
193 unsigned prefix_bytes;
194 uint64_t size_scaler;
198 int pan_tilt[2]; /* pan/tilt vector */
199 int zrs[2][2]; /* zoom/rotate/shear matrix */
200 int perspective[2]; /* perspective vector */
202 unsigned perspective_exp;
205 /* motion compensation */
206 uint8_t mv_precision; /* [DIRAC_STD] REFS_WT_PRECISION */
207 int16_t weight[2]; /* [DIRAC_STD] REF1_WT and REF2_WT */
208 unsigned weight_log2denom; /* [DIRAC_STD] REFS_WT_PRECISION */
210 int blwidth; /* number of blocks (horizontally) */
211 int blheight; /* number of blocks (vertically) */
212 int sbwidth; /* number of superblocks (horizontally) */
213 int sbheight; /* number of superblocks (vertically) */
216 DiracBlock *blmotion;
218 uint8_t *edge_emu_buffer[4];
219 uint8_t *edge_emu_buffer_base;
221 uint16_t *mctmp; /* buffer holding the MC data multiplied by OBMC weights */
225 DECLARE_ALIGNED(16, uint8_t, obmc_weight)[3][MAX_BLOCKSIZE*MAX_BLOCKSIZE];
227 void (*put_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h);
228 void (*avg_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h);
229 void (*add_obmc)(uint16_t *dst, const uint8_t *src, int stride, const uint8_t *obmc_weight, int yblen);
230 dirac_weight_func weight_func;
231 dirac_biweight_func biweight_func;
233 DiracFrame *current_picture;
234 DiracFrame *ref_pics[2];
236 DiracFrame *ref_frames[MAX_REFERENCE_FRAMES+1];
237 DiracFrame *delay_frames[MAX_DELAY+1];
238 DiracFrame all_frames[MAX_FRAMES];
249 /* magic number division by 3 from schroedinger */
250 static inline int divide3(int x)
252 return ((x+1)*21845 + 10922) >> 16;
255 static DiracFrame *remove_frame(DiracFrame *framelist[], int picnum)
257 DiracFrame *remove_pic = NULL;
258 int i, remove_idx = -1;
260 for (i = 0; framelist[i]; i++)
261 if (framelist[i]->avframe->display_picture_number == picnum) {
262 remove_pic = framelist[i];
267 for (i = remove_idx; framelist[i]; i++)
268 framelist[i] = framelist[i+1];
273 static int add_frame(DiracFrame *framelist[], int maxframes, DiracFrame *frame)
276 for (i = 0; i < maxframes; i++)
278 framelist[i] = frame;
284 static int alloc_sequence_buffers(DiracContext *s)
286 int sbwidth = DIVRNDUP(s->seq.width, 4);
287 int sbheight = DIVRNDUP(s->seq.height, 4);
288 int i, w, h, top_padding;
290 /* todo: think more about this / use or set Plane here */
291 for (i = 0; i < 3; i++) {
292 int max_xblen = MAX_BLOCKSIZE >> (i ? s->chroma_x_shift : 0);
293 int max_yblen = MAX_BLOCKSIZE >> (i ? s->chroma_y_shift : 0);
294 w = s->seq.width >> (i ? s->chroma_x_shift : 0);
295 h = s->seq.height >> (i ? s->chroma_y_shift : 0);
297 /* we allocate the max we support here since num decompositions can
298 * change from frame to frame. Stride is aligned to 16 for SIMD, and
299 * 1<<MAX_DWT_LEVELS top padding to avoid if(y>0) in arith decoding
300 * MAX_BLOCKSIZE padding for MC: blocks can spill up to half of that
302 top_padding = FFMAX(1<<MAX_DWT_LEVELS, max_yblen/2);
303 w = FFALIGN(CALC_PADDING(w, MAX_DWT_LEVELS), 8); /* FIXME: Should this be 16 for SSE??? */
304 h = top_padding + CALC_PADDING(h, MAX_DWT_LEVELS) + max_yblen/2;
306 s->plane[i].idwt.buf_base = av_mallocz_array((w+max_xblen), h * (2 << s->pshift));
307 s->plane[i].idwt.tmp = av_malloc_array((w+16), 2 << s->pshift);
308 s->plane[i].idwt.buf = s->plane[i].idwt.buf_base + (top_padding*w)*(2 << s->pshift);
309 if (!s->plane[i].idwt.buf_base || !s->plane[i].idwt.tmp)
310 return AVERROR(ENOMEM);
313 /* fixme: allocate using real stride here */
314 s->sbsplit = av_malloc_array(sbwidth, sbheight);
315 s->blmotion = av_malloc_array(sbwidth, sbheight * 16 * sizeof(*s->blmotion));
317 if (!s->sbsplit || !s->blmotion)
318 return AVERROR(ENOMEM);
322 static int alloc_buffers(DiracContext *s, int stride)
324 int w = s->seq.width;
325 int h = s->seq.height;
327 av_assert0(stride >= w);
330 if (s->buffer_stride >= stride)
332 s->buffer_stride = 0;
334 av_freep(&s->edge_emu_buffer_base);
335 memset(s->edge_emu_buffer, 0, sizeof(s->edge_emu_buffer));
337 av_freep(&s->mcscratch);
339 s->edge_emu_buffer_base = av_malloc_array(stride, MAX_BLOCKSIZE);
341 s->mctmp = av_malloc_array((stride+MAX_BLOCKSIZE), (h+MAX_BLOCKSIZE) * sizeof(*s->mctmp));
342 s->mcscratch = av_malloc_array(stride, MAX_BLOCKSIZE);
344 if (!s->edge_emu_buffer_base || !s->mctmp || !s->mcscratch)
345 return AVERROR(ENOMEM);
347 s->buffer_stride = stride;
351 static void free_sequence_buffers(DiracContext *s)
355 for (i = 0; i < MAX_FRAMES; i++) {
356 if (s->all_frames[i].avframe->data[0]) {
357 av_frame_unref(s->all_frames[i].avframe);
358 memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated));
361 for (j = 0; j < 3; j++)
362 for (k = 1; k < 4; k++)
363 av_freep(&s->all_frames[i].hpel_base[j][k]);
366 memset(s->ref_frames, 0, sizeof(s->ref_frames));
367 memset(s->delay_frames, 0, sizeof(s->delay_frames));
369 for (i = 0; i < 3; i++) {
370 av_freep(&s->plane[i].idwt.buf_base);
371 av_freep(&s->plane[i].idwt.tmp);
374 s->buffer_stride = 0;
375 av_freep(&s->sbsplit);
376 av_freep(&s->blmotion);
377 av_freep(&s->edge_emu_buffer_base);
380 av_freep(&s->mcscratch);
383 static AVOnce dirac_arith_init = AV_ONCE_INIT;
385 static av_cold int dirac_decode_init(AVCodecContext *avctx)
387 DiracContext *s = avctx->priv_data;
391 s->frame_number = -1;
393 s->thread_buf = NULL;
394 s->threads_num_buf = -1;
395 s->thread_buf_size = -1;
397 ff_dirac_golomb_reader_init(&s->reader_ctx);
398 ff_diracdsp_init(&s->diracdsp);
399 ff_mpegvideoencdsp_init(&s->mpvencdsp, avctx);
400 ff_videodsp_init(&s->vdsp, 8);
402 for (i = 0; i < MAX_FRAMES; i++) {
403 s->all_frames[i].avframe = av_frame_alloc();
404 if (!s->all_frames[i].avframe) {
406 av_frame_free(&s->all_frames[--i].avframe);
407 return AVERROR(ENOMEM);
410 ret = ff_thread_once(&dirac_arith_init, ff_dirac_init_arith_tables);
412 return AVERROR_UNKNOWN;
417 static void dirac_decode_flush(AVCodecContext *avctx)
419 DiracContext *s = avctx->priv_data;
420 free_sequence_buffers(s);
421 s->seen_sequence_header = 0;
422 s->frame_number = -1;
425 static av_cold int dirac_decode_end(AVCodecContext *avctx)
427 DiracContext *s = avctx->priv_data;
430 ff_dirac_golomb_reader_end(&s->reader_ctx);
432 dirac_decode_flush(avctx);
433 for (i = 0; i < MAX_FRAMES; i++)
434 av_frame_free(&s->all_frames[i].avframe);
436 av_freep(&s->thread_buf);
437 av_freep(&s->slice_params_buf);
442 static inline int coeff_unpack_golomb(GetBitContext *gb, int qfactor, int qoffset)
444 int coeff = dirac_get_se_golomb(gb);
445 const int sign = FFSIGN(coeff);
447 coeff = sign*((sign * coeff * qfactor + qoffset) >> 2);
451 #define SIGN_CTX(x) (CTX_SIGN_ZERO + ((x) > 0) - ((x) < 0))
453 #define UNPACK_ARITH(n, type) \
454 static inline void coeff_unpack_arith_##n(DiracArith *c, int qfactor, int qoffset, \
455 SubBand *b, type *buf, int x, int y) \
457 int coeff, sign, sign_pred = 0, pred_ctx = CTX_ZPZN_F1; \
458 const int mstride = -(b->stride >> (1+b->pshift)); \
460 const type *pbuf = (type *)b->parent->ibuf; \
461 const int stride = b->parent->stride >> (1+b->parent->pshift); \
462 pred_ctx += !!pbuf[stride * (y>>1) + (x>>1)] << 1; \
464 if (b->orientation == subband_hl) \
465 sign_pred = buf[mstride]; \
467 pred_ctx += !(buf[-1] | buf[mstride] | buf[-1 + mstride]); \
468 if (b->orientation == subband_lh) \
469 sign_pred = buf[-1]; \
471 pred_ctx += !buf[mstride]; \
473 coeff = dirac_get_arith_uint(c, pred_ctx, CTX_COEFF_DATA); \
475 coeff = (coeff * qfactor + qoffset) >> 2; \
476 sign = dirac_get_arith_bit(c, SIGN_CTX(sign_pred)); \
477 coeff = (coeff ^ -sign) + sign; \
482 UNPACK_ARITH(8, int16_t)
483 UNPACK_ARITH(10, int32_t)
486 * Decode the coeffs in the rectangle defined by left, right, top, bottom
487 * [DIRAC_STD] 13.4.3.2 Codeblock unpacking loop. codeblock()
489 static inline void codeblock(DiracContext *s, SubBand *b,
490 GetBitContext *gb, DiracArith *c,
491 int left, int right, int top, int bottom,
492 int blockcnt_one, int is_arith)
494 int x, y, zero_block;
495 int qoffset, qfactor;
498 /* check for any coded coefficients in this codeblock */
501 zero_block = dirac_get_arith_bit(c, CTX_ZERO_BLOCK);
503 zero_block = get_bits1(gb);
509 if (s->codeblock_mode && !(s->old_delta_quant && blockcnt_one)) {
510 int quant = b->quant;
512 quant += dirac_get_arith_int(c, CTX_DELTA_Q_F, CTX_DELTA_Q_DATA);
514 quant += dirac_get_se_golomb(gb);
516 av_log(s->avctx, AV_LOG_ERROR, "Invalid quant\n");
522 if (b->quant > (DIRAC_MAX_QUANT_INDEX - 1)) {
523 av_log(s->avctx, AV_LOG_ERROR, "Unsupported quant %d\n", b->quant);
528 qfactor = ff_dirac_qscale_tab[b->quant];
529 /* TODO: context pointer? */
531 qoffset = ff_dirac_qoffset_intra_tab[b->quant] + 2;
533 qoffset = ff_dirac_qoffset_inter_tab[b->quant] + 2;
535 buf = b->ibuf + top * b->stride;
537 for (y = top; y < bottom; y++) {
538 for (x = left; x < right; x++) {
540 coeff_unpack_arith_10(c, qfactor, qoffset, b, (int32_t*)(buf)+x, x, y);
542 coeff_unpack_arith_8(c, qfactor, qoffset, b, (int16_t*)(buf)+x, x, y);
548 for (y = top; y < bottom; y++) {
549 for (x = left; x < right; x++) {
550 int val = coeff_unpack_golomb(gb, qfactor, qoffset);
552 AV_WN32(&buf[4*x], val);
554 AV_WN16(&buf[2*x], val);
563 * Dirac Specification ->
564 * 13.3 intra_dc_prediction(band)
566 #define INTRA_DC_PRED(n, type) \
567 static inline void intra_dc_prediction_##n(SubBand *b) \
569 type *buf = (type*)b->ibuf; \
572 for (x = 1; x < b->width; x++) \
573 buf[x] += buf[x-1]; \
574 buf += (b->stride >> (1+b->pshift)); \
576 for (y = 1; y < b->height; y++) { \
577 buf[0] += buf[-(b->stride >> (1+b->pshift))]; \
579 for (x = 1; x < b->width; x++) { \
580 int pred = buf[x - 1] + buf[x - (b->stride >> (1+b->pshift))] + buf[x - (b->stride >> (1+b->pshift))-1]; \
581 buf[x] += divide3(pred); \
583 buf += (b->stride >> (1+b->pshift)); \
587 INTRA_DC_PRED(8, int16_t)
588 INTRA_DC_PRED(10, int32_t)
591 * Dirac Specification ->
592 * 13.4.2 Non-skipped subbands. subband_coeffs()
594 static av_always_inline void decode_subband_internal(DiracContext *s, SubBand *b, int is_arith)
596 int cb_x, cb_y, left, right, top, bottom;
599 int cb_width = s->codeblock[b->level + (b->orientation != subband_ll)].width;
600 int cb_height = s->codeblock[b->level + (b->orientation != subband_ll)].height;
601 int blockcnt_one = (cb_width + cb_height) == 2;
606 init_get_bits8(&gb, b->coeff_data, b->length);
609 ff_dirac_init_arith_decoder(&c, &gb, b->length);
612 for (cb_y = 0; cb_y < cb_height; cb_y++) {
613 bottom = (b->height * (cb_y+1LL)) / cb_height;
615 for (cb_x = 0; cb_x < cb_width; cb_x++) {
616 right = (b->width * (cb_x+1LL)) / cb_width;
617 codeblock(s, b, &gb, &c, left, right, top, bottom, blockcnt_one, is_arith);
623 if (b->orientation == subband_ll && s->num_refs == 0) {
625 intra_dc_prediction_10(b);
627 intra_dc_prediction_8(b);
632 static int decode_subband_arith(AVCodecContext *avctx, void *b)
634 DiracContext *s = avctx->priv_data;
635 decode_subband_internal(s, b, 1);
639 static int decode_subband_golomb(AVCodecContext *avctx, void *arg)
641 DiracContext *s = avctx->priv_data;
643 decode_subband_internal(s, *b, 0);
648 * Dirac Specification ->
649 * [DIRAC_STD] 13.4.1 core_transform_data()
651 static void decode_component(DiracContext *s, int comp)
653 AVCodecContext *avctx = s->avctx;
654 SubBand *bands[3*MAX_DWT_LEVELS+1];
655 enum dirac_subband orientation;
656 int level, num_bands = 0;
658 /* Unpack all subbands at all levels. */
659 for (level = 0; level < s->wavelet_depth; level++) {
660 for (orientation = !!level; orientation < 4; orientation++) {
661 SubBand *b = &s->plane[comp].band[level][orientation];
662 bands[num_bands++] = b;
664 align_get_bits(&s->gb);
665 /* [DIRAC_STD] 13.4.2 subband() */
666 b->length = get_interleaved_ue_golomb(&s->gb);
668 b->quant = get_interleaved_ue_golomb(&s->gb);
669 align_get_bits(&s->gb);
670 b->coeff_data = s->gb.buffer + get_bits_count(&s->gb)/8;
671 b->length = FFMIN(b->length, FFMAX(get_bits_left(&s->gb)/8, 0));
672 skip_bits_long(&s->gb, b->length*8);
675 /* arithmetic coding has inter-level dependencies, so we can only execute one level at a time */
677 avctx->execute(avctx, decode_subband_arith, &s->plane[comp].band[level][!!level],
678 NULL, 4-!!level, sizeof(SubBand));
680 /* golomb coding has no inter-level dependencies, so we can execute all subbands in parallel */
682 avctx->execute(avctx, decode_subband_golomb, bands, NULL, num_bands, sizeof(SubBand*));
685 #define PARSE_VALUES(type, x, gb, ebits, buf1, buf2) \
686 type *buf = (type *)buf1; \
687 buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); \
688 if (get_bits_count(gb) >= ebits) \
691 buf = (type *)buf2; \
692 buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); \
693 if (get_bits_count(gb) >= ebits) \
697 static void decode_subband(DiracContext *s, GetBitContext *gb, int quant,
698 int slice_x, int slice_y, int bits_end,
699 SubBand *b1, SubBand *b2)
701 int left = b1->width * slice_x / s->num_x;
702 int right = b1->width *(slice_x+1) / s->num_x;
703 int top = b1->height * slice_y / s->num_y;
704 int bottom = b1->height *(slice_y+1) / s->num_y;
706 int qfactor, qoffset;
708 uint8_t *buf1 = b1->ibuf + top * b1->stride;
709 uint8_t *buf2 = b2 ? b2->ibuf + top * b2->stride: NULL;
712 if (quant > (DIRAC_MAX_QUANT_INDEX - 1)) {
713 av_log(s->avctx, AV_LOG_ERROR, "Unsupported quant %d\n", quant);
716 qfactor = ff_dirac_qscale_tab[quant];
717 qoffset = ff_dirac_qoffset_intra_tab[quant] + 2;
718 /* we have to constantly check for overread since the spec explicitly
719 requires this, with the meaning that all remaining coeffs are set to 0 */
720 if (get_bits_count(gb) >= bits_end)
724 for (y = top; y < bottom; y++) {
725 for (x = left; x < right; x++) {
726 PARSE_VALUES(int32_t, x, gb, bits_end, buf1, buf2);
734 for (y = top; y < bottom; y++) {
735 for (x = left; x < right; x++) {
736 PARSE_VALUES(int16_t, x, gb, bits_end, buf1, buf2);
746 * Dirac Specification ->
747 * 13.5.2 Slices. slice(sx,sy)
749 static int decode_lowdelay_slice(AVCodecContext *avctx, void *arg)
751 DiracContext *s = avctx->priv_data;
752 DiracSlice *slice = arg;
753 GetBitContext *gb = &slice->gb;
754 enum dirac_subband orientation;
755 int level, quant, chroma_bits, chroma_end;
757 int quant_base = get_bits(gb, 7); /*[DIRAC_STD] qindex */
758 int length_bits = av_log2(8 * slice->bytes)+1;
759 int luma_bits = get_bits_long(gb, length_bits);
760 int luma_end = get_bits_count(gb) + FFMIN(luma_bits, get_bits_left(gb));
762 /* [DIRAC_STD] 13.5.5.2 luma_slice_band */
763 for (level = 0; level < s->wavelet_depth; level++)
764 for (orientation = !!level; orientation < 4; orientation++) {
765 quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0);
766 decode_subband(s, gb, quant, slice->slice_x, slice->slice_y, luma_end,
767 &s->plane[0].band[level][orientation], NULL);
770 /* consume any unused bits from luma */
771 skip_bits_long(gb, get_bits_count(gb) - luma_end);
773 chroma_bits = 8*slice->bytes - 7 - length_bits - luma_bits;
774 chroma_end = get_bits_count(gb) + FFMIN(chroma_bits, get_bits_left(gb));
775 /* [DIRAC_STD] 13.5.5.3 chroma_slice_band */
776 for (level = 0; level < s->wavelet_depth; level++)
777 for (orientation = !!level; orientation < 4; orientation++) {
778 quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0);
779 decode_subband(s, gb, quant, slice->slice_x, slice->slice_y, chroma_end,
780 &s->plane[1].band[level][orientation],
781 &s->plane[2].band[level][orientation]);
787 typedef struct SliceCoeffs {
795 static int subband_coeffs(DiracContext *s, int x, int y, int p,
796 SliceCoeffs c[MAX_DWT_LEVELS])
799 for (level = 0; level < s->wavelet_depth; level++) {
800 SliceCoeffs *o = &c[level];
801 SubBand *b = &s->plane[p].band[level][3]; /* orientation doens't matter */
802 o->top = b->height * y / s->num_y;
803 o->left = b->width * x / s->num_x;
804 o->tot_h = ((b->width * (x + 1)) / s->num_x) - o->left;
805 o->tot_v = ((b->height * (y + 1)) / s->num_y) - o->top;
806 o->tot = o->tot_h*o->tot_v;
807 coef += o->tot * (4 - !!level);
813 * VC-2 Specification ->
814 * 13.5.3 hq_slice(sx,sy)
816 static int decode_hq_slice(DiracContext *s, DiracSlice *slice, uint8_t *tmp_buf)
818 int i, level, orientation, quant_idx;
819 int qfactor[MAX_DWT_LEVELS][4], qoffset[MAX_DWT_LEVELS][4];
820 GetBitContext *gb = &slice->gb;
821 SliceCoeffs coeffs_num[MAX_DWT_LEVELS];
823 skip_bits_long(gb, 8*s->highquality.prefix_bytes);
824 quant_idx = get_bits(gb, 8);
826 if (quant_idx > DIRAC_MAX_QUANT_INDEX) {
827 av_log(s->avctx, AV_LOG_ERROR, "Invalid quantization index - %i\n", quant_idx);
828 return AVERROR_INVALIDDATA;
831 /* Slice quantization (slice_quantizers() in the specs) */
832 for (level = 0; level < s->wavelet_depth; level++) {
833 for (orientation = !!level; orientation < 4; orientation++) {
834 const int quant = FFMAX(quant_idx - s->lowdelay.quant[level][orientation], 0);
835 qfactor[level][orientation] = ff_dirac_qscale_tab[quant];
836 qoffset[level][orientation] = ff_dirac_qoffset_intra_tab[quant] + 2;
840 /* Luma + 2 Chroma planes */
841 for (i = 0; i < 3; i++) {
842 int coef_num, coef_par, off = 0;
843 int64_t length = s->highquality.size_scaler*get_bits(gb, 8);
844 int64_t bits_end = get_bits_count(gb) + 8*length;
845 const uint8_t *addr = align_get_bits(gb);
847 if (length*8 > get_bits_left(gb)) {
848 av_log(s->avctx, AV_LOG_ERROR, "end too far away\n");
849 return AVERROR_INVALIDDATA;
852 coef_num = subband_coeffs(s, slice->slice_x, slice->slice_y, i, coeffs_num);
855 coef_par = ff_dirac_golomb_read_32bit(s->reader_ctx, addr,
856 length, tmp_buf, coef_num);
858 coef_par = ff_dirac_golomb_read_16bit(s->reader_ctx, addr,
859 length, tmp_buf, coef_num);
861 if (coef_num > coef_par) {
862 const int start_b = coef_par * (1 << (s->pshift + 1));
863 const int end_b = coef_num * (1 << (s->pshift + 1));
864 memset(&tmp_buf[start_b], 0, end_b - start_b);
867 for (level = 0; level < s->wavelet_depth; level++) {
868 const SliceCoeffs *c = &coeffs_num[level];
869 for (orientation = !!level; orientation < 4; orientation++) {
870 const SubBand *b1 = &s->plane[i].band[level][orientation];
871 uint8_t *buf = b1->ibuf + c->top * b1->stride + (c->left << (s->pshift + 1));
873 /* Change to c->tot_h <= 4 for AVX2 dequantization */
874 const int qfunc = s->pshift + 2*(c->tot_h <= 2);
875 s->diracdsp.dequant_subband[qfunc](&tmp_buf[off], buf, b1->stride,
876 qfactor[level][orientation],
877 qoffset[level][orientation],
880 off += c->tot << (s->pshift + 1);
884 skip_bits_long(gb, bits_end - get_bits_count(gb));
890 static int decode_hq_slice_row(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
893 DiracContext *s = avctx->priv_data;
894 DiracSlice *slices = ((DiracSlice *)arg) + s->num_x*jobnr;
895 uint8_t *thread_buf = &s->thread_buf[s->thread_buf_size*threadnr];
896 for (i = 0; i < s->num_x; i++)
897 decode_hq_slice(s, &slices[i], thread_buf);
902 * Dirac Specification ->
903 * 13.5.1 low_delay_transform_data()
905 static int decode_lowdelay(DiracContext *s)
907 AVCodecContext *avctx = s->avctx;
908 int slice_x, slice_y, bufsize;
909 int64_t coef_buf_size, bytes = 0;
912 SliceCoeffs tmp[MAX_DWT_LEVELS];
915 if (s->slice_params_num_buf != (s->num_x * s->num_y)) {
916 s->slice_params_buf = av_realloc_f(s->slice_params_buf, s->num_x * s->num_y, sizeof(DiracSlice));
917 if (!s->slice_params_buf) {
918 av_log(s->avctx, AV_LOG_ERROR, "slice params buffer allocation failure\n");
919 s->slice_params_num_buf = 0;
920 return AVERROR(ENOMEM);
922 s->slice_params_num_buf = s->num_x * s->num_y;
924 slices = s->slice_params_buf;
926 /* 8 becacuse that's how much the golomb reader could overread junk data
927 * from another plane/slice at most, and 512 because SIMD */
928 coef_buf_size = subband_coeffs(s, s->num_x - 1, s->num_y - 1, 0, tmp) + 8;
929 coef_buf_size = (coef_buf_size << (1 + s->pshift)) + 512;
931 if (s->threads_num_buf != avctx->thread_count ||
932 s->thread_buf_size != coef_buf_size) {
933 s->threads_num_buf = avctx->thread_count;
934 s->thread_buf_size = coef_buf_size;
935 s->thread_buf = av_realloc_f(s->thread_buf, avctx->thread_count, s->thread_buf_size);
936 if (!s->thread_buf) {
937 av_log(s->avctx, AV_LOG_ERROR, "thread buffer allocation failure\n");
938 return AVERROR(ENOMEM);
942 align_get_bits(&s->gb);
943 /*[DIRAC_STD] 13.5.2 Slices. slice(sx,sy) */
944 buf = s->gb.buffer + get_bits_count(&s->gb)/8;
945 bufsize = get_bits_left(&s->gb);
950 for (slice_y = 0; bufsize > 0 && slice_y < s->num_y; slice_y++) {
951 for (slice_x = 0; bufsize > 0 && slice_x < s->num_x; slice_x++) {
952 bytes = s->highquality.prefix_bytes + 1;
953 for (i = 0; i < 3; i++) {
954 if (bytes <= bufsize/8)
955 bytes += buf[bytes] * s->highquality.size_scaler + 1;
957 if (bytes >= INT_MAX || bytes*8 > bufsize) {
958 av_log(s->avctx, AV_LOG_ERROR, "too many bytes\n");
959 return AVERROR_INVALIDDATA;
962 slices[slice_num].bytes = bytes;
963 slices[slice_num].slice_x = slice_x;
964 slices[slice_num].slice_y = slice_y;
965 init_get_bits(&slices[slice_num].gb, buf, bufsize);
969 if (bufsize/8 >= bytes)
976 if (s->num_x*s->num_y != slice_num) {
977 av_log(s->avctx, AV_LOG_ERROR, "too few slices\n");
978 return AVERROR_INVALIDDATA;
981 avctx->execute2(avctx, decode_hq_slice_row, slices, NULL, s->num_y);
983 for (slice_y = 0; bufsize > 0 && slice_y < s->num_y; slice_y++) {
984 for (slice_x = 0; bufsize > 0 && slice_x < s->num_x; slice_x++) {
985 bytes = (slice_num+1) * (int64_t)s->lowdelay.bytes.num / s->lowdelay.bytes.den
986 - slice_num * (int64_t)s->lowdelay.bytes.num / s->lowdelay.bytes.den;
987 slices[slice_num].bytes = bytes;
988 slices[slice_num].slice_x = slice_x;
989 slices[slice_num].slice_y = slice_y;
990 init_get_bits(&slices[slice_num].gb, buf, bufsize);
994 if (bufsize/8 >= bytes)
1000 avctx->execute(avctx, decode_lowdelay_slice, slices, NULL, slice_num,
1001 sizeof(DiracSlice)); /* [DIRAC_STD] 13.5.2 Slices */
1004 if (s->dc_prediction) {
1006 intra_dc_prediction_10(&s->plane[0].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1007 intra_dc_prediction_10(&s->plane[1].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1008 intra_dc_prediction_10(&s->plane[2].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1010 intra_dc_prediction_8(&s->plane[0].band[0][0]);
1011 intra_dc_prediction_8(&s->plane[1].band[0][0]);
1012 intra_dc_prediction_8(&s->plane[2].band[0][0]);
1019 static void init_planes(DiracContext *s)
1021 int i, w, h, level, orientation;
1023 for (i = 0; i < 3; i++) {
1024 Plane *p = &s->plane[i];
1026 p->width = s->seq.width >> (i ? s->chroma_x_shift : 0);
1027 p->height = s->seq.height >> (i ? s->chroma_y_shift : 0);
1028 p->idwt.width = w = CALC_PADDING(p->width , s->wavelet_depth);
1029 p->idwt.height = h = CALC_PADDING(p->height, s->wavelet_depth);
1030 p->idwt.stride = FFALIGN(p->idwt.width, 8) << (1 + s->pshift);
1032 for (level = s->wavelet_depth-1; level >= 0; level--) {
1035 for (orientation = !!level; orientation < 4; orientation++) {
1036 SubBand *b = &p->band[level][orientation];
1038 b->pshift = s->pshift;
1039 b->ibuf = p->idwt.buf;
1041 b->stride = p->idwt.stride << (s->wavelet_depth - level);
1044 b->orientation = orientation;
1046 if (orientation & 1)
1047 b->ibuf += w << (1+b->pshift);
1048 if (orientation > 1)
1049 b->ibuf += (b->stride>>1);
1052 b->parent = &p->band[level-1][orientation];
1057 p->xblen = s->plane[0].xblen >> s->chroma_x_shift;
1058 p->yblen = s->plane[0].yblen >> s->chroma_y_shift;
1059 p->xbsep = s->plane[0].xbsep >> s->chroma_x_shift;
1060 p->ybsep = s->plane[0].ybsep >> s->chroma_y_shift;
1063 p->xoffset = (p->xblen - p->xbsep)/2;
1064 p->yoffset = (p->yblen - p->ybsep)/2;
1069 * Unpack the motion compensation parameters
1070 * Dirac Specification ->
1071 * 11.2 Picture prediction data. picture_prediction()
1073 static int dirac_unpack_prediction_parameters(DiracContext *s)
1075 static const uint8_t default_blen[] = { 4, 12, 16, 24 };
1077 GetBitContext *gb = &s->gb;
1081 /* [DIRAC_STD] 11.2.2 Block parameters. block_parameters() */
1082 /* Luma and Chroma are equal. 11.2.3 */
1083 idx = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] index */
1086 av_log(s->avctx, AV_LOG_ERROR, "Block prediction index too high\n");
1087 return AVERROR_INVALIDDATA;
1091 s->plane[0].xblen = get_interleaved_ue_golomb(gb);
1092 s->plane[0].yblen = get_interleaved_ue_golomb(gb);
1093 s->plane[0].xbsep = get_interleaved_ue_golomb(gb);
1094 s->plane[0].ybsep = get_interleaved_ue_golomb(gb);
1096 /*[DIRAC_STD] preset_block_params(index). Table 11.1 */
1097 s->plane[0].xblen = default_blen[idx-1];
1098 s->plane[0].yblen = default_blen[idx-1];
1099 s->plane[0].xbsep = 4 * idx;
1100 s->plane[0].ybsep = 4 * idx;
1102 /*[DIRAC_STD] 11.2.4 motion_data_dimensions()
1103 Calculated in function dirac_unpack_block_motion_data */
1105 if (s->plane[0].xblen % (1 << s->chroma_x_shift) != 0 ||
1106 s->plane[0].yblen % (1 << s->chroma_y_shift) != 0 ||
1107 !s->plane[0].xblen || !s->plane[0].yblen) {
1108 av_log(s->avctx, AV_LOG_ERROR,
1109 "invalid x/y block length (%d/%d) for x/y chroma shift (%d/%d)\n",
1110 s->plane[0].xblen, s->plane[0].yblen, s->chroma_x_shift, s->chroma_y_shift);
1111 return AVERROR_INVALIDDATA;
1113 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) {
1114 av_log(s->avctx, AV_LOG_ERROR, "Block separation too small\n");
1115 return AVERROR_INVALIDDATA;
1117 if (s->plane[0].xbsep > s->plane[0].xblen || s->plane[0].ybsep > s->plane[0].yblen) {
1118 av_log(s->avctx, AV_LOG_ERROR, "Block separation greater than size\n");
1119 return AVERROR_INVALIDDATA;
1121 if (FFMAX(s->plane[0].xblen, s->plane[0].yblen) > MAX_BLOCKSIZE) {
1122 av_log(s->avctx, AV_LOG_ERROR, "Unsupported large block size\n");
1123 return AVERROR_PATCHWELCOME;
1126 /*[DIRAC_STD] 11.2.5 Motion vector precision. motion_vector_precision()
1127 Read motion vector precision */
1128 s->mv_precision = get_interleaved_ue_golomb(gb);
1129 if (s->mv_precision > 3) {
1130 av_log(s->avctx, AV_LOG_ERROR, "MV precision finer than eighth-pel\n");
1131 return AVERROR_INVALIDDATA;
1134 /*[DIRAC_STD] 11.2.6 Global motion. global_motion()
1135 Read the global motion compensation parameters */
1136 s->globalmc_flag = get_bits1(gb);
1137 if (s->globalmc_flag) {
1138 memset(s->globalmc, 0, sizeof(s->globalmc));
1139 /* [DIRAC_STD] pan_tilt(gparams) */
1140 for (ref = 0; ref < s->num_refs; ref++) {
1141 if (get_bits1(gb)) {
1142 s->globalmc[ref].pan_tilt[0] = dirac_get_se_golomb(gb);
1143 s->globalmc[ref].pan_tilt[1] = dirac_get_se_golomb(gb);
1145 /* [DIRAC_STD] zoom_rotate_shear(gparams)
1146 zoom/rotation/shear parameters */
1147 if (get_bits1(gb)) {
1148 s->globalmc[ref].zrs_exp = get_interleaved_ue_golomb(gb);
1149 s->globalmc[ref].zrs[0][0] = dirac_get_se_golomb(gb);
1150 s->globalmc[ref].zrs[0][1] = dirac_get_se_golomb(gb);
1151 s->globalmc[ref].zrs[1][0] = dirac_get_se_golomb(gb);
1152 s->globalmc[ref].zrs[1][1] = dirac_get_se_golomb(gb);
1154 s->globalmc[ref].zrs[0][0] = 1;
1155 s->globalmc[ref].zrs[1][1] = 1;
1157 /* [DIRAC_STD] perspective(gparams) */
1158 if (get_bits1(gb)) {
1159 s->globalmc[ref].perspective_exp = get_interleaved_ue_golomb(gb);
1160 s->globalmc[ref].perspective[0] = dirac_get_se_golomb(gb);
1161 s->globalmc[ref].perspective[1] = dirac_get_se_golomb(gb);
1166 /*[DIRAC_STD] 11.2.7 Picture prediction mode. prediction_mode()
1167 Picture prediction mode, not currently used. */
1168 if (get_interleaved_ue_golomb(gb)) {
1169 av_log(s->avctx, AV_LOG_ERROR, "Unknown picture prediction mode\n");
1170 return AVERROR_INVALIDDATA;
1173 /* [DIRAC_STD] 11.2.8 Reference picture weight. reference_picture_weights()
1174 just data read, weight calculation will be done later on. */
1175 s->weight_log2denom = 1;
1179 if (get_bits1(gb)) {
1180 s->weight_log2denom = get_interleaved_ue_golomb(gb);
1181 s->weight[0] = dirac_get_se_golomb(gb);
1182 if (s->num_refs == 2)
1183 s->weight[1] = dirac_get_se_golomb(gb);
1189 * Dirac Specification ->
1190 * 11.3 Wavelet transform data. wavelet_transform()
1192 static int dirac_unpack_idwt_params(DiracContext *s)
1194 GetBitContext *gb = &s->gb;
1198 #define CHECKEDREAD(dst, cond, errmsg) \
1199 tmp = get_interleaved_ue_golomb(gb); \
1201 av_log(s->avctx, AV_LOG_ERROR, errmsg); \
1202 return AVERROR_INVALIDDATA; \
1208 s->zero_res = s->num_refs ? get_bits1(gb) : 0;
1212 /*[DIRAC_STD] 11.3.1 Transform parameters. transform_parameters() */
1213 CHECKEDREAD(s->wavelet_idx, tmp > 6, "wavelet_idx is too big\n")
1215 CHECKEDREAD(s->wavelet_depth, tmp > MAX_DWT_LEVELS || tmp < 1, "invalid number of DWT decompositions\n")
1217 if (!s->low_delay) {
1218 /* Codeblock parameters (core syntax only) */
1219 if (get_bits1(gb)) {
1220 for (i = 0; i <= s->wavelet_depth; i++) {
1221 CHECKEDREAD(s->codeblock[i].width , tmp < 1 || tmp > (s->avctx->width >>s->wavelet_depth-i), "codeblock width invalid\n")
1222 CHECKEDREAD(s->codeblock[i].height, tmp < 1 || tmp > (s->avctx->height>>s->wavelet_depth-i), "codeblock height invalid\n")
1225 CHECKEDREAD(s->codeblock_mode, tmp > 1, "unknown codeblock mode\n")
1228 for (i = 0; i <= s->wavelet_depth; i++)
1229 s->codeblock[i].width = s->codeblock[i].height = 1;
1233 s->num_x = get_interleaved_ue_golomb(gb);
1234 s->num_y = get_interleaved_ue_golomb(gb);
1235 if (s->num_x * s->num_y == 0 || s->num_x * (uint64_t)s->num_y > INT_MAX) {
1236 av_log(s->avctx,AV_LOG_ERROR,"Invalid numx/y\n");
1237 s->num_x = s->num_y = 0;
1238 return AVERROR_INVALIDDATA;
1240 if (s->ld_picture) {
1241 s->lowdelay.bytes.num = get_interleaved_ue_golomb(gb);
1242 s->lowdelay.bytes.den = get_interleaved_ue_golomb(gb);
1243 if (s->lowdelay.bytes.den <= 0) {
1244 av_log(s->avctx,AV_LOG_ERROR,"Invalid lowdelay.bytes.den\n");
1245 return AVERROR_INVALIDDATA;
1247 } else if (s->hq_picture) {
1248 s->highquality.prefix_bytes = get_interleaved_ue_golomb(gb);
1249 s->highquality.size_scaler = get_interleaved_ue_golomb(gb);
1250 if (s->highquality.prefix_bytes >= INT_MAX / 8) {
1251 av_log(s->avctx,AV_LOG_ERROR,"too many prefix bytes\n");
1252 return AVERROR_INVALIDDATA;
1256 /* [DIRAC_STD] 11.3.5 Quantisation matrices (low-delay syntax). quant_matrix() */
1257 if (get_bits1(gb)) {
1258 av_log(s->avctx,AV_LOG_DEBUG,"Low Delay: Has Custom Quantization Matrix!\n");
1259 /* custom quantization matrix */
1260 s->lowdelay.quant[0][0] = get_interleaved_ue_golomb(gb);
1261 for (level = 0; level < s->wavelet_depth; level++) {
1262 s->lowdelay.quant[level][1] = get_interleaved_ue_golomb(gb);
1263 s->lowdelay.quant[level][2] = get_interleaved_ue_golomb(gb);
1264 s->lowdelay.quant[level][3] = get_interleaved_ue_golomb(gb);
1267 if (s->wavelet_depth > 4) {
1268 av_log(s->avctx,AV_LOG_ERROR,"Mandatory custom low delay matrix missing for depth %d\n", s->wavelet_depth);
1269 return AVERROR_INVALIDDATA;
1271 /* default quantization matrix */
1272 for (level = 0; level < s->wavelet_depth; level++)
1273 for (i = 0; i < 4; i++) {
1274 s->lowdelay.quant[level][i] = ff_dirac_default_qmat[s->wavelet_idx][level][i];
1275 /* haar with no shift differs for different depths */
1276 if (s->wavelet_idx == 3)
1277 s->lowdelay.quant[level][i] += 4*(s->wavelet_depth-1 - level);
1284 static inline int pred_sbsplit(uint8_t *sbsplit, int stride, int x, int y)
1286 static const uint8_t avgsplit[7] = { 0, 0, 1, 1, 1, 2, 2 };
1293 return sbsplit[-stride];
1295 return avgsplit[sbsplit[-1] + sbsplit[-stride] + sbsplit[-stride-1]];
1298 static inline int pred_block_mode(DiracBlock *block, int stride, int x, int y, int refmask)
1305 return block[-1].ref & refmask;
1307 return block[-stride].ref & refmask;
1309 /* return the majority */
1310 pred = (block[-1].ref & refmask) + (block[-stride].ref & refmask) + (block[-stride-1].ref & refmask);
1311 return (pred >> 1) & refmask;
1314 static inline void pred_block_dc(DiracBlock *block, int stride, int x, int y)
1318 memset(block->u.dc, 0, sizeof(block->u.dc));
1320 if (x && !(block[-1].ref & 3)) {
1321 for (i = 0; i < 3; i++)
1322 block->u.dc[i] += block[-1].u.dc[i];
1326 if (y && !(block[-stride].ref & 3)) {
1327 for (i = 0; i < 3; i++)
1328 block->u.dc[i] += block[-stride].u.dc[i];
1332 if (x && y && !(block[-1-stride].ref & 3)) {
1333 for (i = 0; i < 3; i++)
1334 block->u.dc[i] += block[-1-stride].u.dc[i];
1339 for (i = 0; i < 3; i++)
1340 block->u.dc[i] = (block->u.dc[i]+1)>>1;
1341 } else if (n == 3) {
1342 for (i = 0; i < 3; i++)
1343 block->u.dc[i] = divide3(block->u.dc[i]);
1347 static inline void pred_mv(DiracBlock *block, int stride, int x, int y, int ref)
1350 int refmask = ref+1;
1351 int mask = refmask | DIRAC_REF_MASK_GLOBAL; /* exclude gmc blocks */
1354 if (x && (block[-1].ref & mask) == refmask)
1355 pred[n++] = block[-1].u.mv[ref];
1357 if (y && (block[-stride].ref & mask) == refmask)
1358 pred[n++] = block[-stride].u.mv[ref];
1360 if (x && y && (block[-stride-1].ref & mask) == refmask)
1361 pred[n++] = block[-stride-1].u.mv[ref];
1365 block->u.mv[ref][0] = 0;
1366 block->u.mv[ref][1] = 0;
1369 block->u.mv[ref][0] = pred[0][0];
1370 block->u.mv[ref][1] = pred[0][1];
1373 block->u.mv[ref][0] = (pred[0][0] + pred[1][0] + 1) >> 1;
1374 block->u.mv[ref][1] = (pred[0][1] + pred[1][1] + 1) >> 1;
1377 block->u.mv[ref][0] = mid_pred(pred[0][0], pred[1][0], pred[2][0]);
1378 block->u.mv[ref][1] = mid_pred(pred[0][1], pred[1][1], pred[2][1]);
1383 static void global_mv(DiracContext *s, DiracBlock *block, int x, int y, int ref)
1385 int ez = s->globalmc[ref].zrs_exp;
1386 int ep = s->globalmc[ref].perspective_exp;
1387 int (*A)[2] = s->globalmc[ref].zrs;
1388 int *b = s->globalmc[ref].pan_tilt;
1389 int *c = s->globalmc[ref].perspective;
1391 int m = (1<<ep) - (c[0]*x + c[1]*y);
1392 int mx = m * ((A[0][0] * x + A[0][1]*y) + (1<<ez) * b[0]);
1393 int my = m * ((A[1][0] * x + A[1][1]*y) + (1<<ez) * b[1]);
1395 block->u.mv[ref][0] = (mx + (1<<(ez+ep))) >> (ez+ep);
1396 block->u.mv[ref][1] = (my + (1<<(ez+ep))) >> (ez+ep);
1399 static void decode_block_params(DiracContext *s, DiracArith arith[8], DiracBlock *block,
1400 int stride, int x, int y)
1404 block->ref = pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_REF1);
1405 block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF1);
1407 if (s->num_refs == 2) {
1408 block->ref |= pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_REF2);
1409 block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF2) << 1;
1413 pred_block_dc(block, stride, x, y);
1414 for (i = 0; i < 3; i++)
1415 block->u.dc[i] += dirac_get_arith_int(arith+1+i, CTX_DC_F1, CTX_DC_DATA);
1419 if (s->globalmc_flag) {
1420 block->ref |= pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_GLOBAL);
1421 block->ref ^= dirac_get_arith_bit(arith, CTX_GLOBAL_BLOCK) << 2;
1424 for (i = 0; i < s->num_refs; i++)
1425 if (block->ref & (i+1)) {
1426 if (block->ref & DIRAC_REF_MASK_GLOBAL) {
1427 global_mv(s, block, x, y, i);
1429 pred_mv(block, stride, x, y, i);
1430 block->u.mv[i][0] += dirac_get_arith_int(arith + 4 + 2 * i, CTX_MV_F1, CTX_MV_DATA);
1431 block->u.mv[i][1] += dirac_get_arith_int(arith + 5 + 2 * i, CTX_MV_F1, CTX_MV_DATA);
1437 * Copies the current block to the other blocks covered by the current superblock split mode
1439 static void propagate_block_data(DiracBlock *block, int stride, int size)
1442 DiracBlock *dst = block;
1444 for (x = 1; x < size; x++)
1447 for (y = 1; y < size; y++) {
1449 for (x = 0; x < size; x++)
1455 * Dirac Specification ->
1456 * 12. Block motion data syntax
1458 static int dirac_unpack_block_motion_data(DiracContext *s)
1460 GetBitContext *gb = &s->gb;
1461 uint8_t *sbsplit = s->sbsplit;
1463 DiracArith arith[8];
1467 /* [DIRAC_STD] 11.2.4 and 12.2.1 Number of blocks and superblocks */
1468 s->sbwidth = DIVRNDUP(s->seq.width, 4*s->plane[0].xbsep);
1469 s->sbheight = DIVRNDUP(s->seq.height, 4*s->plane[0].ybsep);
1470 s->blwidth = 4 * s->sbwidth;
1471 s->blheight = 4 * s->sbheight;
1473 /* [DIRAC_STD] 12.3.1 Superblock splitting modes. superblock_split_modes()
1474 decode superblock split modes */
1475 ff_dirac_init_arith_decoder(arith, gb, get_interleaved_ue_golomb(gb)); /* get_interleaved_ue_golomb(gb) is the length */
1476 for (y = 0; y < s->sbheight; y++) {
1477 for (x = 0; x < s->sbwidth; x++) {
1478 unsigned int split = dirac_get_arith_uint(arith, CTX_SB_F1, CTX_SB_DATA);
1480 return AVERROR_INVALIDDATA;
1481 sbsplit[x] = (split + pred_sbsplit(sbsplit+x, s->sbwidth, x, y)) % 3;
1483 sbsplit += s->sbwidth;
1486 /* setup arith decoding */
1487 ff_dirac_init_arith_decoder(arith, gb, get_interleaved_ue_golomb(gb));
1488 for (i = 0; i < s->num_refs; i++) {
1489 ff_dirac_init_arith_decoder(arith + 4 + 2 * i, gb, get_interleaved_ue_golomb(gb));
1490 ff_dirac_init_arith_decoder(arith + 5 + 2 * i, gb, get_interleaved_ue_golomb(gb));
1492 for (i = 0; i < 3; i++)
1493 ff_dirac_init_arith_decoder(arith+1+i, gb, get_interleaved_ue_golomb(gb));
1495 for (y = 0; y < s->sbheight; y++)
1496 for (x = 0; x < s->sbwidth; x++) {
1497 int blkcnt = 1 << s->sbsplit[y * s->sbwidth + x];
1498 int step = 4 >> s->sbsplit[y * s->sbwidth + x];
1500 for (q = 0; q < blkcnt; q++)
1501 for (p = 0; p < blkcnt; p++) {
1502 int bx = 4 * x + p*step;
1503 int by = 4 * y + q*step;
1504 DiracBlock *block = &s->blmotion[by*s->blwidth + bx];
1505 decode_block_params(s, arith, block, s->blwidth, bx, by);
1506 propagate_block_data(block, s->blwidth, step);
1513 static int weight(int i, int blen, int offset)
1515 #define ROLLOFF(i) offset == 1 ? ((i) ? 5 : 3) : \
1516 (1 + (6*(i) + offset - 1) / (2*offset - 1))
1520 else if (i > blen-1 - 2*offset)
1521 return ROLLOFF(blen-1 - i);
1525 static void init_obmc_weight_row(Plane *p, uint8_t *obmc_weight, int stride,
1526 int left, int right, int wy)
1529 for (x = 0; left && x < p->xblen >> 1; x++)
1530 obmc_weight[x] = wy*8;
1531 for (; x < p->xblen >> right; x++)
1532 obmc_weight[x] = wy*weight(x, p->xblen, p->xoffset);
1533 for (; x < p->xblen; x++)
1534 obmc_weight[x] = wy*8;
1535 for (; x < stride; x++)
1539 static void init_obmc_weight(Plane *p, uint8_t *obmc_weight, int stride,
1540 int left, int right, int top, int bottom)
1543 for (y = 0; top && y < p->yblen >> 1; y++) {
1544 init_obmc_weight_row(p, obmc_weight, stride, left, right, 8);
1545 obmc_weight += stride;
1547 for (; y < p->yblen >> bottom; y++) {
1548 int wy = weight(y, p->yblen, p->yoffset);
1549 init_obmc_weight_row(p, obmc_weight, stride, left, right, wy);
1550 obmc_weight += stride;
1552 for (; y < p->yblen; y++) {
1553 init_obmc_weight_row(p, obmc_weight, stride, left, right, 8);
1554 obmc_weight += stride;
1558 static void init_obmc_weights(DiracContext *s, Plane *p, int by)
1561 int bottom = by == s->blheight-1;
1563 /* don't bother re-initing for rows 2 to blheight-2, the weights don't change */
1564 if (top || bottom || by == 1) {
1565 init_obmc_weight(p, s->obmc_weight[0], MAX_BLOCKSIZE, 1, 0, top, bottom);
1566 init_obmc_weight(p, s->obmc_weight[1], MAX_BLOCKSIZE, 0, 0, top, bottom);
1567 init_obmc_weight(p, s->obmc_weight[2], MAX_BLOCKSIZE, 0, 1, top, bottom);
1571 static const uint8_t epel_weights[4][4][4] = {
1591 * For block x,y, determine which of the hpel planes to do bilinear
1592 * interpolation from and set src[] to the location in each hpel plane
1595 * @return the index of the put_dirac_pixels_tab function to use
1596 * 0 for 1 plane (fpel,hpel), 1 for 2 planes (qpel), 2 for 4 planes (qpel), and 3 for epel
1598 static int mc_subpel(DiracContext *s, DiracBlock *block, const uint8_t *src[5],
1599 int x, int y, int ref, int plane)
1601 Plane *p = &s->plane[plane];
1602 uint8_t **ref_hpel = s->ref_pics[ref]->hpel[plane];
1603 int motion_x = block->u.mv[ref][0];
1604 int motion_y = block->u.mv[ref][1];
1605 int mx, my, i, epel, nplanes = 0;
1608 motion_x >>= s->chroma_x_shift;
1609 motion_y >>= s->chroma_y_shift;
1612 mx = motion_x & ~(-1U << s->mv_precision);
1613 my = motion_y & ~(-1U << s->mv_precision);
1614 motion_x >>= s->mv_precision;
1615 motion_y >>= s->mv_precision;
1616 /* normalize subpel coordinates to epel */
1617 /* TODO: template this function? */
1618 mx <<= 3 - s->mv_precision;
1619 my <<= 3 - s->mv_precision;
1628 src[0] = ref_hpel[(my>>1)+(mx>>2)] + y*p->stride + x;
1632 for (i = 0; i < 4; i++)
1633 src[i] = ref_hpel[i] + y*p->stride + x;
1635 /* if we're interpolating in the right/bottom halves, adjust the planes as needed
1636 we increment x/y because the edge changes for half of the pixels */
1643 src[0] += p->stride;
1644 src[1] += p->stride;
1652 /* check if we really only need 2 planes since either mx or my is
1653 a hpel position. (epel weights of 0 handle this there) */
1655 /* mx == 0: average [0] and [2]
1656 mx == 4: average [1] and [3] */
1657 src[!mx] = src[2 + !!mx];
1659 } else if (!(my&3)) {
1660 src[0] = src[(my>>1) ];
1661 src[1] = src[(my>>1)+1];
1665 /* adjust the ordering if needed so the weights work */
1667 FFSWAP(const uint8_t *, src[0], src[1]);
1668 FFSWAP(const uint8_t *, src[2], src[3]);
1671 FFSWAP(const uint8_t *, src[0], src[2]);
1672 FFSWAP(const uint8_t *, src[1], src[3]);
1674 src[4] = epel_weights[my&3][mx&3];
1678 /* fixme: v/h _edge_pos */
1679 if (x + p->xblen > p->width +EDGE_WIDTH/2 ||
1680 y + p->yblen > p->height+EDGE_WIDTH/2 ||
1682 for (i = 0; i < nplanes; i++) {
1683 s->vdsp.emulated_edge_mc(s->edge_emu_buffer[i], src[i],
1684 p->stride, p->stride,
1685 p->xblen, p->yblen, x, y,
1686 p->width+EDGE_WIDTH/2, p->height+EDGE_WIDTH/2);
1687 src[i] = s->edge_emu_buffer[i];
1690 return (nplanes>>1) + epel;
1693 static void add_dc(uint16_t *dst, int dc, int stride,
1694 uint8_t *obmc_weight, int xblen, int yblen)
1699 for (y = 0; y < yblen; y++) {
1700 for (x = 0; x < xblen; x += 2) {
1701 dst[x ] += dc * obmc_weight[x ];
1702 dst[x+1] += dc * obmc_weight[x+1];
1705 obmc_weight += MAX_BLOCKSIZE;
1709 static void block_mc(DiracContext *s, DiracBlock *block,
1710 uint16_t *mctmp, uint8_t *obmc_weight,
1711 int plane, int dstx, int dsty)
1713 Plane *p = &s->plane[plane];
1714 const uint8_t *src[5];
1717 switch (block->ref&3) {
1719 add_dc(mctmp, block->u.dc[plane], p->stride, obmc_weight, p->xblen, p->yblen);
1723 idx = mc_subpel(s, block, src, dstx, dsty, (block->ref&3)-1, plane);
1724 s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1726 s->weight_func(s->mcscratch, p->stride, s->weight_log2denom,
1727 s->weight[0] + s->weight[1], p->yblen);
1730 idx = mc_subpel(s, block, src, dstx, dsty, 0, plane);
1731 s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1732 idx = mc_subpel(s, block, src, dstx, dsty, 1, plane);
1733 if (s->biweight_func) {
1734 /* fixme: +32 is a quick hack */
1735 s->put_pixels_tab[idx](s->mcscratch + 32, src, p->stride, p->yblen);
1736 s->biweight_func(s->mcscratch, s->mcscratch+32, p->stride, s->weight_log2denom,
1737 s->weight[0], s->weight[1], p->yblen);
1739 s->avg_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1742 s->add_obmc(mctmp, s->mcscratch, p->stride, obmc_weight, p->yblen);
1745 static void mc_row(DiracContext *s, DiracBlock *block, uint16_t *mctmp, int plane, int dsty)
1747 Plane *p = &s->plane[plane];
1748 int x, dstx = p->xbsep - p->xoffset;
1750 block_mc(s, block, mctmp, s->obmc_weight[0], plane, -p->xoffset, dsty);
1753 for (x = 1; x < s->blwidth-1; x++) {
1754 block_mc(s, block+x, mctmp, s->obmc_weight[1], plane, dstx, dsty);
1758 block_mc(s, block+x, mctmp, s->obmc_weight[2], plane, dstx, dsty);
1761 static void select_dsp_funcs(DiracContext *s, int width, int height, int xblen, int yblen)
1769 memcpy(s->put_pixels_tab, s->diracdsp.put_dirac_pixels_tab[idx], sizeof(s->put_pixels_tab));
1770 memcpy(s->avg_pixels_tab, s->diracdsp.avg_dirac_pixels_tab[idx], sizeof(s->avg_pixels_tab));
1771 s->add_obmc = s->diracdsp.add_dirac_obmc[idx];
1772 if (s->weight_log2denom > 1 || s->weight[0] != 1 || s->weight[1] != 1) {
1773 s->weight_func = s->diracdsp.weight_dirac_pixels_tab[idx];
1774 s->biweight_func = s->diracdsp.biweight_dirac_pixels_tab[idx];
1776 s->weight_func = NULL;
1777 s->biweight_func = NULL;
1781 static int interpolate_refplane(DiracContext *s, DiracFrame *ref, int plane, int width, int height)
1783 /* chroma allocates an edge of 8 when subsampled
1784 which for 4:2:2 means an h edge of 16 and v edge of 8
1785 just use 8 for everything for the moment */
1786 int i, edge = EDGE_WIDTH/2;
1788 ref->hpel[plane][0] = ref->avframe->data[plane];
1789 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 */
1791 /* no need for hpel if we only have fpel vectors */
1792 if (!s->mv_precision)
1795 for (i = 1; i < 4; i++) {
1796 if (!ref->hpel_base[plane][i])
1797 ref->hpel_base[plane][i] = av_malloc((height+2*edge) * ref->avframe->linesize[plane] + 32);
1798 if (!ref->hpel_base[plane][i]) {
1799 return AVERROR(ENOMEM);
1801 /* we need to be 16-byte aligned even for chroma */
1802 ref->hpel[plane][i] = ref->hpel_base[plane][i] + edge*ref->avframe->linesize[plane] + 16;
1805 if (!ref->interpolated[plane]) {
1806 s->diracdsp.dirac_hpel_filter(ref->hpel[plane][1], ref->hpel[plane][2],
1807 ref->hpel[plane][3], ref->hpel[plane][0],
1808 ref->avframe->linesize[plane], width, height);
1809 s->mpvencdsp.draw_edges(ref->hpel[plane][1], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1810 s->mpvencdsp.draw_edges(ref->hpel[plane][2], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1811 s->mpvencdsp.draw_edges(ref->hpel[plane][3], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1813 ref->interpolated[plane] = 1;
1819 * Dirac Specification ->
1820 * 13.0 Transform data syntax. transform_data()
1822 static int dirac_decode_frame_internal(DiracContext *s)
1825 int y, i, comp, dsty;
1829 /* [DIRAC_STD] 13.5.1 low_delay_transform_data() */
1830 if (!s->hq_picture) {
1831 for (comp = 0; comp < 3; comp++) {
1832 Plane *p = &s->plane[comp];
1833 memset(p->idwt.buf, 0, p->idwt.stride * p->idwt.height);
1837 if ((ret = decode_lowdelay(s)) < 0)
1842 for (comp = 0; comp < 3; comp++) {
1843 Plane *p = &s->plane[comp];
1844 uint8_t *frame = s->current_picture->avframe->data[comp];
1846 /* FIXME: small resolutions */
1847 for (i = 0; i < 4; i++)
1848 s->edge_emu_buffer[i] = s->edge_emu_buffer_base + i*FFALIGN(p->width, 16);
1850 if (!s->zero_res && !s->low_delay)
1852 memset(p->idwt.buf, 0, p->idwt.stride * p->idwt.height);
1853 decode_component(s, comp); /* [DIRAC_STD] 13.4.1 core_transform_data() */
1855 ret = ff_spatial_idwt_init(&d, &p->idwt, s->wavelet_idx+2,
1856 s->wavelet_depth, s->bit_depth);
1860 if (!s->num_refs) { /* intra */
1861 for (y = 0; y < p->height; y += 16) {
1862 int idx = (s->bit_depth - 8) >> 1;
1863 ff_spatial_idwt_slice2(&d, y+16); /* decode */
1864 s->diracdsp.put_signed_rect_clamped[idx](frame + y*p->stride,
1866 p->idwt.buf + y*p->idwt.stride,
1867 p->idwt.stride, p->width, 16);
1869 } else { /* inter */
1870 int rowheight = p->ybsep*p->stride;
1872 select_dsp_funcs(s, p->width, p->height, p->xblen, p->yblen);
1874 for (i = 0; i < s->num_refs; i++) {
1875 int ret = interpolate_refplane(s, s->ref_pics[i], comp, p->width, p->height);
1880 memset(s->mctmp, 0, 4*p->yoffset*p->stride);
1883 for (y = 0; y < s->blheight; y++) {
1885 start = FFMAX(dsty, 0);
1886 uint16_t *mctmp = s->mctmp + y*rowheight;
1887 DiracBlock *blocks = s->blmotion + y*s->blwidth;
1889 init_obmc_weights(s, p, y);
1891 if (y == s->blheight-1 || start+p->ybsep > p->height)
1892 h = p->height - start;
1894 h = p->ybsep - (start - dsty);
1898 memset(mctmp+2*p->yoffset*p->stride, 0, 2*rowheight);
1899 mc_row(s, blocks, mctmp, comp, dsty);
1901 mctmp += (start - dsty)*p->stride + p->xoffset;
1902 ff_spatial_idwt_slice2(&d, start + h); /* decode */
1903 /* NOTE: add_rect_clamped hasn't been templated hence the shifts.
1904 * idwt.stride is passed as pixels, not in bytes as in the rest of the decoder */
1905 s->diracdsp.add_rect_clamped(frame + start*p->stride, mctmp, p->stride,
1906 (int16_t*)(p->idwt.buf) + start*(p->idwt.stride >> 1), (p->idwt.stride >> 1), p->width, h);
1917 static int get_buffer_with_edge(AVCodecContext *avctx, AVFrame *f, int flags)
1920 int chroma_x_shift, chroma_y_shift;
1921 avcodec_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift, &chroma_y_shift);
1923 f->width = avctx->width + 2 * EDGE_WIDTH;
1924 f->height = avctx->height + 2 * EDGE_WIDTH + 2;
1925 ret = ff_get_buffer(avctx, f, flags);
1929 for (i = 0; f->data[i]; i++) {
1930 int offset = (EDGE_WIDTH >> (i && i<3 ? chroma_y_shift : 0)) *
1931 f->linesize[i] + 32;
1932 f->data[i] += offset;
1934 f->width = avctx->width;
1935 f->height = avctx->height;
1941 * Dirac Specification ->
1942 * 11.1.1 Picture Header. picture_header()
1944 static int dirac_decode_picture_header(DiracContext *s)
1946 unsigned retire, picnum;
1948 int64_t refdist, refnum;
1949 GetBitContext *gb = &s->gb;
1951 /* [DIRAC_STD] 11.1.1 Picture Header. picture_header() PICTURE_NUM */
1952 picnum = s->current_picture->avframe->display_picture_number = get_bits_long(gb, 32);
1955 av_log(s->avctx,AV_LOG_DEBUG,"PICTURE_NUM: %d\n",picnum);
1957 /* if this is the first keyframe after a sequence header, start our
1958 reordering from here */
1959 if (s->frame_number < 0)
1960 s->frame_number = picnum;
1962 s->ref_pics[0] = s->ref_pics[1] = NULL;
1963 for (i = 0; i < s->num_refs; i++) {
1964 refnum = (picnum + dirac_get_se_golomb(gb)) & 0xFFFFFFFF;
1965 refdist = INT64_MAX;
1967 /* find the closest reference to the one we want */
1968 /* Jordi: this is needed if the referenced picture hasn't yet arrived */
1969 for (j = 0; j < MAX_REFERENCE_FRAMES && refdist; j++)
1970 if (s->ref_frames[j]
1971 && FFABS(s->ref_frames[j]->avframe->display_picture_number - refnum) < refdist) {
1972 s->ref_pics[i] = s->ref_frames[j];
1973 refdist = FFABS(s->ref_frames[j]->avframe->display_picture_number - refnum);
1976 if (!s->ref_pics[i] || refdist)
1977 av_log(s->avctx, AV_LOG_DEBUG, "Reference not found\n");
1979 /* if there were no references at all, allocate one */
1980 if (!s->ref_pics[i])
1981 for (j = 0; j < MAX_FRAMES; j++)
1982 if (!s->all_frames[j].avframe->data[0]) {
1983 s->ref_pics[i] = &s->all_frames[j];
1984 ret = get_buffer_with_edge(s->avctx, s->ref_pics[i]->avframe, AV_GET_BUFFER_FLAG_REF);
1990 if (!s->ref_pics[i]) {
1991 av_log(s->avctx, AV_LOG_ERROR, "Reference could not be allocated\n");
1992 return AVERROR_INVALIDDATA;
1997 /* retire the reference frames that are not used anymore */
1998 if (s->current_picture->reference) {
1999 retire = (picnum + dirac_get_se_golomb(gb)) & 0xFFFFFFFF;
2000 if (retire != picnum) {
2001 DiracFrame *retire_pic = remove_frame(s->ref_frames, retire);
2004 retire_pic->reference &= DELAYED_PIC_REF;
2006 av_log(s->avctx, AV_LOG_DEBUG, "Frame to retire not found\n");
2009 /* if reference array is full, remove the oldest as per the spec */
2010 while (add_frame(s->ref_frames, MAX_REFERENCE_FRAMES, s->current_picture)) {
2011 av_log(s->avctx, AV_LOG_ERROR, "Reference frame overflow\n");
2012 remove_frame(s->ref_frames, s->ref_frames[0]->avframe->display_picture_number)->reference &= DELAYED_PIC_REF;
2017 ret = dirac_unpack_prediction_parameters(s); /* [DIRAC_STD] 11.2 Picture Prediction Data. picture_prediction() */
2020 ret = dirac_unpack_block_motion_data(s); /* [DIRAC_STD] 12. Block motion data syntax */
2024 ret = dirac_unpack_idwt_params(s); /* [DIRAC_STD] 11.3 Wavelet transform data */
2032 static int get_delayed_pic(DiracContext *s, AVFrame *picture, int *got_frame)
2034 DiracFrame *out = s->delay_frames[0];
2038 /* find frame with lowest picture number */
2039 for (i = 1; s->delay_frames[i]; i++)
2040 if (s->delay_frames[i]->avframe->display_picture_number < out->avframe->display_picture_number) {
2041 out = s->delay_frames[i];
2045 for (i = out_idx; s->delay_frames[i]; i++)
2046 s->delay_frames[i] = s->delay_frames[i+1];
2049 out->reference ^= DELAYED_PIC_REF;
2051 if((ret = av_frame_ref(picture, out->avframe)) < 0)
2059 * Dirac Specification ->
2060 * 9.6 Parse Info Header Syntax. parse_info()
2061 * 4 byte start code + byte parse code + 4 byte size + 4 byte previous size
2063 #define DATA_UNIT_HEADER_SIZE 13
2065 /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3
2066 inside the function parse_sequence() */
2067 static int dirac_decode_data_unit(AVCodecContext *avctx, const uint8_t *buf, int size)
2069 DiracContext *s = avctx->priv_data;
2070 DiracFrame *pic = NULL;
2071 AVDiracSeqHeader *dsh;
2076 if (size < DATA_UNIT_HEADER_SIZE)
2077 return AVERROR_INVALIDDATA;
2079 parse_code = buf[4];
2081 init_get_bits(&s->gb, &buf[13], 8*(size - DATA_UNIT_HEADER_SIZE));
2083 if (parse_code == DIRAC_PCODE_SEQ_HEADER) {
2084 if (s->seen_sequence_header)
2087 /* [DIRAC_STD] 10. Sequence header */
2088 ret = av_dirac_parse_sequence_header(&dsh, buf + DATA_UNIT_HEADER_SIZE, size - DATA_UNIT_HEADER_SIZE, avctx);
2090 av_log(avctx, AV_LOG_ERROR, "error parsing sequence header");
2094 ret = ff_set_dimensions(avctx, dsh->width, dsh->height);
2100 ff_set_sar(avctx, dsh->sample_aspect_ratio);
2101 avctx->pix_fmt = dsh->pix_fmt;
2102 avctx->color_range = dsh->color_range;
2103 avctx->color_trc = dsh->color_trc;
2104 avctx->color_primaries = dsh->color_primaries;
2105 avctx->colorspace = dsh->colorspace;
2106 avctx->profile = dsh->profile;
2107 avctx->level = dsh->level;
2108 avctx->framerate = dsh->framerate;
2109 s->bit_depth = dsh->bit_depth;
2110 s->version.major = dsh->version.major;
2111 s->version.minor = dsh->version.minor;
2115 s->pshift = s->bit_depth > 8;
2117 avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift);
2119 ret = alloc_sequence_buffers(s);
2123 s->seen_sequence_header = 1;
2124 } else if (parse_code == DIRAC_PCODE_END_SEQ) { /* [DIRAC_STD] End of Sequence */
2125 free_sequence_buffers(s);
2126 s->seen_sequence_header = 0;
2127 } else if (parse_code == DIRAC_PCODE_AUX) {
2128 if (buf[13] == 1) { /* encoder implementation/version */
2130 /* versions older than 1.0.8 don't store quant delta for
2131 subbands with only one codeblock */
2132 if (sscanf(buf+14, "Schroedinger %d.%d.%d", ver, ver+1, ver+2) == 3)
2133 if (ver[0] == 1 && ver[1] == 0 && ver[2] <= 7)
2134 s->old_delta_quant = 1;
2136 } else if (parse_code & 0x8) { /* picture data unit */
2137 if (!s->seen_sequence_header) {
2138 av_log(avctx, AV_LOG_DEBUG, "Dropping frame without sequence header\n");
2139 return AVERROR_INVALIDDATA;
2142 /* find an unused frame */
2143 for (i = 0; i < MAX_FRAMES; i++)
2144 if (s->all_frames[i].avframe->data[0] == NULL)
2145 pic = &s->all_frames[i];
2147 av_log(avctx, AV_LOG_ERROR, "framelist full\n");
2148 return AVERROR_INVALIDDATA;
2151 av_frame_unref(pic->avframe);
2153 /* [DIRAC_STD] Defined in 9.6.1 ... */
2154 tmp = parse_code & 0x03; /* [DIRAC_STD] num_refs() */
2156 av_log(avctx, AV_LOG_ERROR, "num_refs of 3\n");
2157 return AVERROR_INVALIDDATA;
2160 s->is_arith = (parse_code & 0x48) == 0x08; /* [DIRAC_STD] using_ac() */
2161 s->low_delay = (parse_code & 0x88) == 0x88; /* [DIRAC_STD] is_low_delay() */
2162 s->core_syntax = (parse_code & 0x88) == 0x08; /* [DIRAC_STD] is_core_syntax() */
2163 s->ld_picture = (parse_code & 0xF8) == 0xC8; /* [DIRAC_STD] is_ld_picture() */
2164 s->hq_picture = (parse_code & 0xF8) == 0xE8; /* [DIRAC_STD] is_hq_picture() */
2165 s->dc_prediction = (parse_code & 0x28) == 0x08; /* [DIRAC_STD] using_dc_prediction() */
2166 pic->reference = (parse_code & 0x0C) == 0x0C; /* [DIRAC_STD] is_reference() */
2167 pic->avframe->key_frame = s->num_refs == 0; /* [DIRAC_STD] is_intra() */
2168 pic->avframe->pict_type = s->num_refs + 1; /* Definition of AVPictureType in avutil.h */
2170 /* VC-2 Low Delay has a different parse code than the Dirac Low Delay */
2171 if (s->version.minor == 2 && parse_code == 0x88)
2174 if (s->low_delay && !(s->ld_picture || s->hq_picture) ) {
2175 av_log(avctx, AV_LOG_ERROR, "Invalid low delay flag\n");
2176 return AVERROR_INVALIDDATA;
2179 if ((ret = get_buffer_with_edge(avctx, pic->avframe, (parse_code & 0x0C) == 0x0C ? AV_GET_BUFFER_FLAG_REF : 0)) < 0)
2181 s->current_picture = pic;
2182 s->plane[0].stride = pic->avframe->linesize[0];
2183 s->plane[1].stride = pic->avframe->linesize[1];
2184 s->plane[2].stride = pic->avframe->linesize[2];
2186 if (alloc_buffers(s, FFMAX3(FFABS(s->plane[0].stride), FFABS(s->plane[1].stride), FFABS(s->plane[2].stride))) < 0)
2187 return AVERROR(ENOMEM);
2189 /* [DIRAC_STD] 11.1 Picture parse. picture_parse() */
2190 ret = dirac_decode_picture_header(s);
2194 /* [DIRAC_STD] 13.0 Transform data syntax. transform_data() */
2195 ret = dirac_decode_frame_internal(s);
2202 static int dirac_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *pkt)
2204 DiracContext *s = avctx->priv_data;
2205 AVFrame *picture = data;
2206 uint8_t *buf = pkt->data;
2207 int buf_size = pkt->size;
2210 unsigned data_unit_size;
2212 /* release unused frames */
2213 for (i = 0; i < MAX_FRAMES; i++)
2214 if (s->all_frames[i].avframe->data[0] && !s->all_frames[i].reference) {
2215 av_frame_unref(s->all_frames[i].avframe);
2216 memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated));
2219 s->current_picture = NULL;
2222 /* end of stream, so flush delayed pics */
2224 return get_delayed_pic(s, (AVFrame *)data, got_frame);
2227 /*[DIRAC_STD] Here starts the code from parse_info() defined in 9.6
2228 [DIRAC_STD] PARSE_INFO_PREFIX = "BBCD" as defined in ISO/IEC 646
2229 BBCD start code search */
2230 for (; buf_idx + DATA_UNIT_HEADER_SIZE < buf_size; buf_idx++) {
2231 if (buf[buf_idx ] == 'B' && buf[buf_idx+1] == 'B' &&
2232 buf[buf_idx+2] == 'C' && buf[buf_idx+3] == 'D')
2235 /* BBCD found or end of data */
2236 if (buf_idx + DATA_UNIT_HEADER_SIZE >= buf_size)
2239 data_unit_size = AV_RB32(buf+buf_idx+5);
2240 if (data_unit_size > buf_size - buf_idx || !data_unit_size) {
2241 if(data_unit_size > buf_size - buf_idx)
2242 av_log(s->avctx, AV_LOG_ERROR,
2243 "Data unit with size %d is larger than input buffer, discarding\n",
2248 /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3 inside the function parse_sequence() */
2249 ret = dirac_decode_data_unit(avctx, buf+buf_idx, data_unit_size);
2252 av_log(s->avctx, AV_LOG_ERROR,"Error in dirac_decode_data_unit\n");
2255 buf_idx += data_unit_size;
2258 if (!s->current_picture)
2261 if (s->current_picture->avframe->display_picture_number > s->frame_number) {
2262 DiracFrame *delayed_frame = remove_frame(s->delay_frames, s->frame_number);
2264 s->current_picture->reference |= DELAYED_PIC_REF;
2266 if (add_frame(s->delay_frames, MAX_DELAY, s->current_picture)) {
2267 int min_num = s->delay_frames[0]->avframe->display_picture_number;
2268 /* Too many delayed frames, so we display the frame with the lowest pts */
2269 av_log(avctx, AV_LOG_ERROR, "Delay frame overflow\n");
2271 for (i = 1; s->delay_frames[i]; i++)
2272 if (s->delay_frames[i]->avframe->display_picture_number < min_num)
2273 min_num = s->delay_frames[i]->avframe->display_picture_number;
2275 delayed_frame = remove_frame(s->delay_frames, min_num);
2276 add_frame(s->delay_frames, MAX_DELAY, s->current_picture);
2279 if (delayed_frame) {
2280 delayed_frame->reference ^= DELAYED_PIC_REF;
2281 if((ret=av_frame_ref(data, delayed_frame->avframe)) < 0)
2285 } else if (s->current_picture->avframe->display_picture_number == s->frame_number) {
2286 /* The right frame at the right time :-) */
2287 if((ret=av_frame_ref(data, s->current_picture->avframe)) < 0)
2293 s->frame_number = picture->display_picture_number + 1;
2298 AVCodec ff_dirac_decoder = {
2300 .long_name = NULL_IF_CONFIG_SMALL("BBC Dirac VC-2"),
2301 .type = AVMEDIA_TYPE_VIDEO,
2302 .id = AV_CODEC_ID_DIRAC,
2303 .priv_data_size = sizeof(DiracContext),
2304 .init = dirac_decode_init,
2305 .close = dirac_decode_end,
2306 .decode = dirac_decode_frame,
2307 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_DR1,
2308 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
2309 .flush = dirac_decode_flush,