From 741fb4b9e135cfb161a749db88713229038577bb Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Thu, 5 Sep 2013 17:55:35 +0100 Subject: making act segmenter --- ffmpeg1/libavcodec/diracdec.c | 1938 ----------------------------------------- 1 file changed, 1938 deletions(-) delete mode 100644 ffmpeg1/libavcodec/diracdec.c (limited to 'ffmpeg1/libavcodec/diracdec.c') diff --git a/ffmpeg1/libavcodec/diracdec.c b/ffmpeg1/libavcodec/diracdec.c deleted file mode 100644 index 81d2b65..0000000 --- a/ffmpeg1/libavcodec/diracdec.c +++ /dev/null @@ -1,1938 +0,0 @@ -/* - * Copyright (C) 2007 Marco Gerards - * Copyright (C) 2009 David Conrad - * Copyright (C) 2011 Jordi Ortiz - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * Dirac Decoder - * @author Marco Gerards , David Conrad, Jordi Ortiz - */ - -#include "avcodec.h" -#include "dsputil.h" -#include "get_bits.h" -#include "bytestream.h" -#include "internal.h" -#include "golomb.h" -#include "dirac_arith.h" -#include "mpeg12data.h" -#include "dirac_dwt.h" -#include "dirac.h" -#include "diracdsp.h" -#include "videodsp.h" // for ff_emulated_edge_mc_8 - -/** - * The spec limits the number of wavelet decompositions to 4 for both - * level 1 (VC-2) and 128 (long-gop default). - * 5 decompositions is the maximum before >16-bit buffers are needed. - * Schroedinger allows this for DD 9,7 and 13,7 wavelets only, limiting - * the others to 4 decompositions (or 3 for the fidelity filter). - * - * We use this instead of MAX_DECOMPOSITIONS to save some memory. - */ -#define MAX_DWT_LEVELS 5 - -/** - * The spec limits this to 3 for frame coding, but in practice can be as high as 6 - */ -#define MAX_REFERENCE_FRAMES 8 -#define MAX_DELAY 5 /* limit for main profile for frame coding (TODO: field coding) */ -#define MAX_FRAMES (MAX_REFERENCE_FRAMES + MAX_DELAY + 1) -#define MAX_QUANT 68 /* max quant for VC-2 */ -#define MAX_BLOCKSIZE 32 /* maximum xblen/yblen we support */ - -/** - * DiracBlock->ref flags, if set then the block does MC from the given ref - */ -#define DIRAC_REF_MASK_REF1 1 -#define DIRAC_REF_MASK_REF2 2 -#define DIRAC_REF_MASK_GLOBAL 4 - -/** - * Value of Picture.reference when Picture is not a reference picture, but - * is held for delayed output. - */ -#define DELAYED_PIC_REF 4 - -#define ff_emulated_edge_mc ff_emulated_edge_mc_8 /* Fix: change the calls to this function regarding bit depth */ - -#define CALC_PADDING(size, depth) \ - (((size + (1 << depth) - 1) >> depth) << depth) - -#define DIVRNDUP(a, b) (((a) + (b) - 1) / (b)) - -typedef struct { - AVFrame avframe; - int interpolated[3]; /* 1 if hpel[] is valid */ - uint8_t *hpel[3][4]; - uint8_t *hpel_base[3][4]; -} DiracFrame; - -typedef struct { - union { - int16_t mv[2][2]; - int16_t dc[3]; - } u; /* anonymous unions aren't in C99 :( */ - uint8_t ref; -} DiracBlock; - -typedef struct SubBand { - int level; - int orientation; - int stride; - int width; - int height; - int quant; - IDWTELEM *ibuf; - struct SubBand *parent; - - /* for low delay */ - unsigned length; - const uint8_t *coeff_data; -} SubBand; - -typedef struct Plane { - int width; - int height; - int stride; - - int idwt_width; - int idwt_height; - int idwt_stride; - IDWTELEM *idwt_buf; - IDWTELEM *idwt_buf_base; - IDWTELEM *idwt_tmp; - - /* block length */ - uint8_t xblen; - uint8_t yblen; - /* block separation (block n+1 starts after this many pixels in block n) */ - uint8_t xbsep; - uint8_t ybsep; - /* amount of overspill on each edge (half of the overlap between blocks) */ - uint8_t xoffset; - uint8_t yoffset; - - SubBand band[MAX_DWT_LEVELS][4]; -} Plane; - -typedef struct DiracContext { - AVCodecContext *avctx; - DSPContext dsp; - DiracDSPContext diracdsp; - GetBitContext gb; - dirac_source_params source; - int seen_sequence_header; - int frame_number; /* number of the next frame to display */ - Plane plane[3]; - int chroma_x_shift; - int chroma_y_shift; - - int zero_res; /* zero residue flag */ - int is_arith; /* whether coeffs use arith or golomb coding */ - int low_delay; /* use the low delay syntax */ - int globalmc_flag; /* use global motion compensation */ - int num_refs; /* number of reference pictures */ - - /* wavelet decoding */ - unsigned wavelet_depth; /* depth of the IDWT */ - unsigned wavelet_idx; - - /** - * schroedinger older than 1.0.8 doesn't store - * quant delta if only one codebook exists in a band - */ - unsigned old_delta_quant; - unsigned codeblock_mode; - - struct { - unsigned width; - unsigned height; - } codeblock[MAX_DWT_LEVELS+1]; - - struct { - unsigned num_x; /* number of horizontal slices */ - unsigned num_y; /* number of vertical slices */ - AVRational bytes; /* average bytes per slice */ - uint8_t quant[MAX_DWT_LEVELS][4]; /* [DIRAC_STD] E.1 */ - } lowdelay; - - struct { - int pan_tilt[2]; /* pan/tilt vector */ - int zrs[2][2]; /* zoom/rotate/shear matrix */ - int perspective[2]; /* perspective vector */ - unsigned zrs_exp; - unsigned perspective_exp; - } globalmc[2]; - - /* motion compensation */ - uint8_t mv_precision; /* [DIRAC_STD] REFS_WT_PRECISION */ - int16_t weight[2]; /* [DIRAC_STD] REF1_WT and REF2_WT */ - unsigned weight_log2denom; /* [DIRAC_STD] REFS_WT_PRECISION */ - - int blwidth; /* number of blocks (horizontally) */ - int blheight; /* number of blocks (vertically) */ - int sbwidth; /* number of superblocks (horizontally) */ - int sbheight; /* number of superblocks (vertically) */ - - uint8_t *sbsplit; - DiracBlock *blmotion; - - uint8_t *edge_emu_buffer[4]; - uint8_t *edge_emu_buffer_base; - - uint16_t *mctmp; /* buffer holding the MC data multipled by OBMC weights */ - uint8_t *mcscratch; - - DECLARE_ALIGNED(16, uint8_t, obmc_weight)[3][MAX_BLOCKSIZE*MAX_BLOCKSIZE]; - - void (*put_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h); - void (*avg_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h); - void (*add_obmc)(uint16_t *dst, const uint8_t *src, int stride, const uint8_t *obmc_weight, int yblen); - dirac_weight_func weight_func; - dirac_biweight_func biweight_func; - - DiracFrame *current_picture; - DiracFrame *ref_pics[2]; - - DiracFrame *ref_frames[MAX_REFERENCE_FRAMES+1]; - DiracFrame *delay_frames[MAX_DELAY+1]; - DiracFrame all_frames[MAX_FRAMES]; -} DiracContext; - -/** - * Dirac Specification -> - * Parse code values. 9.6.1 Table 9.1 - */ -enum dirac_parse_code { - pc_seq_header = 0x00, - pc_eos = 0x10, - pc_aux_data = 0x20, - pc_padding = 0x30, -}; - -enum dirac_subband { - subband_ll = 0, - subband_hl = 1, - subband_lh = 2, - subband_hh = 3 -}; - -static const uint8_t default_qmat[][4][4] = { - { { 5, 3, 3, 0}, { 0, 4, 4, 1}, { 0, 5, 5, 2}, { 0, 6, 6, 3} }, - { { 4, 2, 2, 0}, { 0, 4, 4, 2}, { 0, 5, 5, 3}, { 0, 7, 7, 5} }, - { { 5, 3, 3, 0}, { 0, 4, 4, 1}, { 0, 5, 5, 2}, { 0, 6, 6, 3} }, - { { 8, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0} }, - { { 8, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0} }, - { { 0, 4, 4, 8}, { 0, 8, 8, 12}, { 0, 13, 13, 17}, { 0, 17, 17, 21} }, - { { 3, 1, 1, 0}, { 0, 4, 4, 2}, { 0, 6, 6, 5}, { 0, 9, 9, 7} }, -}; - -static const int qscale_tab[MAX_QUANT+1] = { - 4, 5, 6, 7, 8, 10, 11, 13, - 16, 19, 23, 27, 32, 38, 45, 54, - 64, 76, 91, 108, 128, 152, 181, 215, - 256, 304, 362, 431, 512, 609, 724, 861, - 1024, 1218, 1448, 1722, 2048, 2435, 2896, 3444, - 4096, 4871, 5793, 6889, 8192, 9742, 11585, 13777, - 16384, 19484, 23170, 27554, 32768, 38968, 46341, 55109, - 65536, 77936 -}; - -static const int qoffset_intra_tab[MAX_QUANT+1] = { - 1, 2, 3, 4, 4, 5, 6, 7, - 8, 10, 12, 14, 16, 19, 23, 27, - 32, 38, 46, 54, 64, 76, 91, 108, - 128, 152, 181, 216, 256, 305, 362, 431, - 512, 609, 724, 861, 1024, 1218, 1448, 1722, - 2048, 2436, 2897, 3445, 4096, 4871, 5793, 6889, - 8192, 9742, 11585, 13777, 16384, 19484, 23171, 27555, - 32768, 38968 -}; - -static const int qoffset_inter_tab[MAX_QUANT+1] = { - 1, 2, 2, 3, 3, 4, 4, 5, - 6, 7, 9, 10, 12, 14, 17, 20, - 24, 29, 34, 41, 48, 57, 68, 81, - 96, 114, 136, 162, 192, 228, 272, 323, - 384, 457, 543, 646, 768, 913, 1086, 1292, - 1536, 1827, 2172, 2583, 3072, 3653, 4344, 5166, - 6144, 7307, 8689, 10333, 12288, 14613, 17378, 20666, - 24576, 29226 -}; - -/* magic number division by 3 from schroedinger */ -static inline int divide3(int x) -{ - return ((x+1)*21845 + 10922) >> 16; -} - -static DiracFrame *remove_frame(DiracFrame *framelist[], int picnum) -{ - DiracFrame *remove_pic = NULL; - int i, remove_idx = -1; - - for (i = 0; framelist[i]; i++) - if (framelist[i]->avframe.display_picture_number == picnum) { - remove_pic = framelist[i]; - remove_idx = i; - } - - if (remove_pic) - for (i = remove_idx; framelist[i]; i++) - framelist[i] = framelist[i+1]; - - return remove_pic; -} - -static int add_frame(DiracFrame *framelist[], int maxframes, DiracFrame *frame) -{ - int i; - for (i = 0; i < maxframes; i++) - if (!framelist[i]) { - framelist[i] = frame; - return 0; - } - return -1; -} - -static int alloc_sequence_buffers(DiracContext *s) -{ - int sbwidth = DIVRNDUP(s->source.width, 4); - int sbheight = DIVRNDUP(s->source.height, 4); - int i, w, h, top_padding; - - /* todo: think more about this / use or set Plane here */ - for (i = 0; i < 3; i++) { - int max_xblen = MAX_BLOCKSIZE >> (i ? s->chroma_x_shift : 0); - int max_yblen = MAX_BLOCKSIZE >> (i ? s->chroma_y_shift : 0); - w = s->source.width >> (i ? s->chroma_x_shift : 0); - h = s->source.height >> (i ? s->chroma_y_shift : 0); - - /* we allocate the max we support here since num decompositions can - * change from frame to frame. Stride is aligned to 16 for SIMD, and - * 1<0) in arith decoding - * MAX_BLOCKSIZE padding for MC: blocks can spill up to half of that - * on each side */ - top_padding = FFMAX(1<plane[i].idwt_buf_base = av_mallocz((w+max_xblen)*h * sizeof(IDWTELEM)); - s->plane[i].idwt_tmp = av_malloc((w+16) * sizeof(IDWTELEM)); - s->plane[i].idwt_buf = s->plane[i].idwt_buf_base + top_padding*w; - if (!s->plane[i].idwt_buf_base || !s->plane[i].idwt_tmp) - return AVERROR(ENOMEM); - } - - w = s->source.width; - h = s->source.height; - - /* fixme: allocate using real stride here */ - s->sbsplit = av_malloc(sbwidth * sbheight); - s->blmotion = av_malloc(sbwidth * sbheight * 16 * sizeof(*s->blmotion)); - s->edge_emu_buffer_base = av_malloc((w+64)*MAX_BLOCKSIZE); - - s->mctmp = av_malloc((w+64+MAX_BLOCKSIZE) * (h+MAX_BLOCKSIZE) * sizeof(*s->mctmp)); - s->mcscratch = av_malloc((w+64)*MAX_BLOCKSIZE); - - if (!s->sbsplit || !s->blmotion || !s->mctmp || !s->mcscratch) - return AVERROR(ENOMEM); - return 0; -} - -static void free_sequence_buffers(DiracContext *s) -{ - int i, j, k; - - for (i = 0; i < MAX_FRAMES; i++) { - if (s->all_frames[i].avframe.data[0]) { - av_frame_unref(&s->all_frames[i].avframe); - memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated)); - } - - for (j = 0; j < 3; j++) - for (k = 1; k < 4; k++) - av_freep(&s->all_frames[i].hpel_base[j][k]); - } - - memset(s->ref_frames, 0, sizeof(s->ref_frames)); - memset(s->delay_frames, 0, sizeof(s->delay_frames)); - - for (i = 0; i < 3; i++) { - av_freep(&s->plane[i].idwt_buf_base); - av_freep(&s->plane[i].idwt_tmp); - } - - av_freep(&s->sbsplit); - av_freep(&s->blmotion); - av_freep(&s->edge_emu_buffer_base); - - av_freep(&s->mctmp); - av_freep(&s->mcscratch); -} - -static av_cold int dirac_decode_init(AVCodecContext *avctx) -{ - DiracContext *s = avctx->priv_data; - s->avctx = avctx; - s->frame_number = -1; - - if (avctx->flags&CODEC_FLAG_EMU_EDGE) { - av_log(avctx, AV_LOG_ERROR, "Edge emulation not supported!\n"); - return AVERROR_PATCHWELCOME; - } - - ff_dsputil_init(&s->dsp, avctx); - ff_diracdsp_init(&s->diracdsp); - - return 0; -} - -static void dirac_decode_flush(AVCodecContext *avctx) -{ - DiracContext *s = avctx->priv_data; - free_sequence_buffers(s); - s->seen_sequence_header = 0; - s->frame_number = -1; -} - -static av_cold int dirac_decode_end(AVCodecContext *avctx) -{ - dirac_decode_flush(avctx); - return 0; -} - -#define SIGN_CTX(x) (CTX_SIGN_ZERO + ((x) > 0) - ((x) < 0)) - -static inline void coeff_unpack_arith(DiracArith *c, int qfactor, int qoffset, - SubBand *b, IDWTELEM *buf, int x, int y) -{ - int coeff, sign; - int sign_pred = 0; - int pred_ctx = CTX_ZPZN_F1; - - /* Check if the parent subband has a 0 in the corresponding position */ - if (b->parent) - pred_ctx += !!b->parent->ibuf[b->parent->stride * (y>>1) + (x>>1)] << 1; - - if (b->orientation == subband_hl) - sign_pred = buf[-b->stride]; - - /* Determine if the pixel has only zeros in its neighbourhood */ - if (x) { - pred_ctx += !(buf[-1] | buf[-b->stride] | buf[-1-b->stride]); - if (b->orientation == subband_lh) - sign_pred = buf[-1]; - } else { - pred_ctx += !buf[-b->stride]; - } - - coeff = dirac_get_arith_uint(c, pred_ctx, CTX_COEFF_DATA); - if (coeff) { - coeff = (coeff * qfactor + qoffset + 2) >> 2; - sign = dirac_get_arith_bit(c, SIGN_CTX(sign_pred)); - coeff = (coeff ^ -sign) + sign; - } - *buf = coeff; -} - -static inline int coeff_unpack_golomb(GetBitContext *gb, int qfactor, int qoffset) -{ - int sign, coeff; - - coeff = svq3_get_ue_golomb(gb); - if (coeff) { - coeff = (coeff * qfactor + qoffset + 2) >> 2; - sign = get_bits1(gb); - coeff = (coeff ^ -sign) + sign; - } - return coeff; -} - -/** - * Decode the coeffs in the rectangle defined by left, right, top, bottom - * [DIRAC_STD] 13.4.3.2 Codeblock unpacking loop. codeblock() - */ -static inline void codeblock(DiracContext *s, SubBand *b, - GetBitContext *gb, DiracArith *c, - int left, int right, int top, int bottom, - int blockcnt_one, int is_arith) -{ - int x, y, zero_block; - int qoffset, qfactor; - IDWTELEM *buf; - - /* check for any coded coefficients in this codeblock */ - if (!blockcnt_one) { - if (is_arith) - zero_block = dirac_get_arith_bit(c, CTX_ZERO_BLOCK); - else - zero_block = get_bits1(gb); - - if (zero_block) - return; - } - - if (s->codeblock_mode && !(s->old_delta_quant && blockcnt_one)) { - int quant = b->quant; - if (is_arith) - quant += dirac_get_arith_int(c, CTX_DELTA_Q_F, CTX_DELTA_Q_DATA); - else - quant += dirac_get_se_golomb(gb); - if (quant < 0) { - av_log(s->avctx, AV_LOG_ERROR, "Invalid quant\n"); - return; - } - b->quant = quant; - } - - b->quant = FFMIN(b->quant, MAX_QUANT); - - qfactor = qscale_tab[b->quant]; - /* TODO: context pointer? */ - if (!s->num_refs) - qoffset = qoffset_intra_tab[b->quant]; - else - qoffset = qoffset_inter_tab[b->quant]; - - buf = b->ibuf + top * b->stride; - for (y = top; y < bottom; y++) { - for (x = left; x < right; x++) { - /* [DIRAC_STD] 13.4.4 Subband coefficients. coeff_unpack() */ - if (is_arith) - coeff_unpack_arith(c, qfactor, qoffset, b, buf+x, x, y); - else - buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); - } - buf += b->stride; - } -} - -/** - * Dirac Specification -> - * 13.3 intra_dc_prediction(band) - */ -static inline void intra_dc_prediction(SubBand *b) -{ - IDWTELEM *buf = b->ibuf; - int x, y; - - for (x = 1; x < b->width; x++) - buf[x] += buf[x-1]; - buf += b->stride; - - for (y = 1; y < b->height; y++) { - buf[0] += buf[-b->stride]; - - for (x = 1; x < b->width; x++) { - int pred = buf[x - 1] + buf[x - b->stride] + buf[x - b->stride-1]; - buf[x] += divide3(pred); - } - buf += b->stride; - } -} - -/** - * Dirac Specification -> - * 13.4.2 Non-skipped subbands. subband_coeffs() - */ -static av_always_inline void decode_subband_internal(DiracContext *s, SubBand *b, int is_arith) -{ - int cb_x, cb_y, left, right, top, bottom; - DiracArith c; - GetBitContext gb; - int cb_width = s->codeblock[b->level + (b->orientation != subband_ll)].width; - int cb_height = s->codeblock[b->level + (b->orientation != subband_ll)].height; - int blockcnt_one = (cb_width + cb_height) == 2; - - if (!b->length) - return; - - init_get_bits(&gb, b->coeff_data, b->length*8); - - if (is_arith) - ff_dirac_init_arith_decoder(&c, &gb, b->length); - - top = 0; - for (cb_y = 0; cb_y < cb_height; cb_y++) { - bottom = (b->height * (cb_y+1)) / cb_height; - left = 0; - for (cb_x = 0; cb_x < cb_width; cb_x++) { - right = (b->width * (cb_x+1)) / cb_width; - codeblock(s, b, &gb, &c, left, right, top, bottom, blockcnt_one, is_arith); - left = right; - } - top = bottom; - } - - if (b->orientation == subband_ll && s->num_refs == 0) - intra_dc_prediction(b); -} - -static int decode_subband_arith(AVCodecContext *avctx, void *b) -{ - DiracContext *s = avctx->priv_data; - decode_subband_internal(s, b, 1); - return 0; -} - -static int decode_subband_golomb(AVCodecContext *avctx, void *arg) -{ - DiracContext *s = avctx->priv_data; - SubBand **b = arg; - decode_subband_internal(s, *b, 0); - return 0; -} - -/** - * Dirac Specification -> - * [DIRAC_STD] 13.4.1 core_transform_data() - */ -static void decode_component(DiracContext *s, int comp) -{ - AVCodecContext *avctx = s->avctx; - SubBand *bands[3*MAX_DWT_LEVELS+1]; - enum dirac_subband orientation; - int level, num_bands = 0; - - /* Unpack all subbands at all levels. */ - for (level = 0; level < s->wavelet_depth; level++) { - for (orientation = !!level; orientation < 4; orientation++) { - SubBand *b = &s->plane[comp].band[level][orientation]; - bands[num_bands++] = b; - - align_get_bits(&s->gb); - /* [DIRAC_STD] 13.4.2 subband() */ - b->length = svq3_get_ue_golomb(&s->gb); - if (b->length) { - b->quant = svq3_get_ue_golomb(&s->gb); - align_get_bits(&s->gb); - b->coeff_data = s->gb.buffer + get_bits_count(&s->gb)/8; - b->length = FFMIN(b->length, FFMAX(get_bits_left(&s->gb)/8, 0)); - skip_bits_long(&s->gb, b->length*8); - } - } - /* arithmetic coding has inter-level dependencies, so we can only execute one level at a time */ - if (s->is_arith) - avctx->execute(avctx, decode_subband_arith, &s->plane[comp].band[level][!!level], - NULL, 4-!!level, sizeof(SubBand)); - } - /* golomb coding has no inter-level dependencies, so we can execute all subbands in parallel */ - if (!s->is_arith) - avctx->execute(avctx, decode_subband_golomb, bands, NULL, num_bands, sizeof(SubBand*)); -} - -/* [DIRAC_STD] 13.5.5.2 Luma slice subband data. luma_slice_band(level,orient,sx,sy) --> if b2 == NULL */ -/* [DIRAC_STD] 13.5.5.3 Chroma slice subband data. chroma_slice_band(level,orient,sx,sy) --> if b2 != NULL */ -static void lowdelay_subband(DiracContext *s, GetBitContext *gb, int quant, - int slice_x, int slice_y, int bits_end, - SubBand *b1, SubBand *b2) -{ - int left = b1->width * slice_x / s->lowdelay.num_x; - int right = b1->width *(slice_x+1) / s->lowdelay.num_x; - int top = b1->height * slice_y / s->lowdelay.num_y; - int bottom = b1->height *(slice_y+1) / s->lowdelay.num_y; - - int qfactor = qscale_tab[FFMIN(quant, MAX_QUANT)]; - int qoffset = qoffset_intra_tab[FFMIN(quant, MAX_QUANT)]; - - IDWTELEM *buf1 = b1->ibuf + top * b1->stride; - IDWTELEM *buf2 = b2 ? b2->ibuf + top * b2->stride : NULL; - int x, y; - /* we have to constantly check for overread since the spec explictly - requires this, with the meaning that all remaining coeffs are set to 0 */ - if (get_bits_count(gb) >= bits_end) - return; - - for (y = top; y < bottom; y++) { - for (x = left; x < right; x++) { - buf1[x] = coeff_unpack_golomb(gb, qfactor, qoffset); - if (get_bits_count(gb) >= bits_end) - return; - if (buf2) { - buf2[x] = coeff_unpack_golomb(gb, qfactor, qoffset); - if (get_bits_count(gb) >= bits_end) - return; - } - } - buf1 += b1->stride; - if (buf2) - buf2 += b2->stride; - } -} - -struct lowdelay_slice { - GetBitContext gb; - int slice_x; - int slice_y; - int bytes; -}; - - -/** - * Dirac Specification -> - * 13.5.2 Slices. slice(sx,sy) - */ -static int decode_lowdelay_slice(AVCodecContext *avctx, void *arg) -{ - DiracContext *s = avctx->priv_data; - struct lowdelay_slice *slice = arg; - GetBitContext *gb = &slice->gb; - enum dirac_subband orientation; - int level, quant, chroma_bits, chroma_end; - - int quant_base = get_bits(gb, 7); /*[DIRAC_STD] qindex */ - int length_bits = av_log2(8 * slice->bytes)+1; - int luma_bits = get_bits_long(gb, length_bits); - int luma_end = get_bits_count(gb) + FFMIN(luma_bits, get_bits_left(gb)); - - /* [DIRAC_STD] 13.5.5.2 luma_slice_band */ - for (level = 0; level < s->wavelet_depth; level++) - for (orientation = !!level; orientation < 4; orientation++) { - quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0); - lowdelay_subband(s, gb, quant, slice->slice_x, slice->slice_y, luma_end, - &s->plane[0].band[level][orientation], NULL); - } - - /* consume any unused bits from luma */ - skip_bits_long(gb, get_bits_count(gb) - luma_end); - - chroma_bits = 8*slice->bytes - 7 - length_bits - luma_bits; - chroma_end = get_bits_count(gb) + FFMIN(chroma_bits, get_bits_left(gb)); - /* [DIRAC_STD] 13.5.5.3 chroma_slice_band */ - for (level = 0; level < s->wavelet_depth; level++) - for (orientation = !!level; orientation < 4; orientation++) { - quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0); - lowdelay_subband(s, gb, quant, slice->slice_x, slice->slice_y, chroma_end, - &s->plane[1].band[level][orientation], - &s->plane[2].band[level][orientation]); - } - - return 0; -} - -/** - * Dirac Specification -> - * 13.5.1 low_delay_transform_data() - */ -static void decode_lowdelay(DiracContext *s) -{ - AVCodecContext *avctx = s->avctx; - int slice_x, slice_y, bytes, bufsize; - const uint8_t *buf; - struct lowdelay_slice *slices; - int slice_num = 0; - - slices = av_mallocz(s->lowdelay.num_x * s->lowdelay.num_y * sizeof(struct lowdelay_slice)); - - align_get_bits(&s->gb); - /*[DIRAC_STD] 13.5.2 Slices. slice(sx,sy) */ - buf = s->gb.buffer + get_bits_count(&s->gb)/8; - bufsize = get_bits_left(&s->gb); - - for (slice_y = 0; bufsize > 0 && slice_y < s->lowdelay.num_y; slice_y++) - for (slice_x = 0; bufsize > 0 && slice_x < s->lowdelay.num_x; slice_x++) { - bytes = (slice_num+1) * s->lowdelay.bytes.num / s->lowdelay.bytes.den - - slice_num * s->lowdelay.bytes.num / s->lowdelay.bytes.den; - - slices[slice_num].bytes = bytes; - slices[slice_num].slice_x = slice_x; - slices[slice_num].slice_y = slice_y; - init_get_bits(&slices[slice_num].gb, buf, bufsize); - slice_num++; - - buf += bytes; - bufsize -= bytes*8; - } - - avctx->execute(avctx, decode_lowdelay_slice, slices, NULL, slice_num, - sizeof(struct lowdelay_slice)); /* [DIRAC_STD] 13.5.2 Slices */ - intra_dc_prediction(&s->plane[0].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */ - intra_dc_prediction(&s->plane[1].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */ - intra_dc_prediction(&s->plane[2].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */ - av_free(slices); -} - -static void init_planes(DiracContext *s) -{ - int i, w, h, level, orientation; - - for (i = 0; i < 3; i++) { - Plane *p = &s->plane[i]; - - p->width = s->source.width >> (i ? s->chroma_x_shift : 0); - p->height = s->source.height >> (i ? s->chroma_y_shift : 0); - p->idwt_width = w = CALC_PADDING(p->width , s->wavelet_depth); - p->idwt_height = h = CALC_PADDING(p->height, s->wavelet_depth); - p->idwt_stride = FFALIGN(p->idwt_width, 8); - - for (level = s->wavelet_depth-1; level >= 0; level--) { - w = w>>1; - h = h>>1; - for (orientation = !!level; orientation < 4; orientation++) { - SubBand *b = &p->band[level][orientation]; - - b->ibuf = p->idwt_buf; - b->level = level; - b->stride = p->idwt_stride << (s->wavelet_depth - level); - b->width = w; - b->height = h; - b->orientation = orientation; - - if (orientation & 1) - b->ibuf += w; - if (orientation > 1) - b->ibuf += b->stride>>1; - - if (level) - b->parent = &p->band[level-1][orientation]; - } - } - - if (i > 0) { - p->xblen = s->plane[0].xblen >> s->chroma_x_shift; - p->yblen = s->plane[0].yblen >> s->chroma_y_shift; - p->xbsep = s->plane[0].xbsep >> s->chroma_x_shift; - p->ybsep = s->plane[0].ybsep >> s->chroma_y_shift; - } - - p->xoffset = (p->xblen - p->xbsep)/2; - p->yoffset = (p->yblen - p->ybsep)/2; - } -} - -/** - * Unpack the motion compensation parameters - * Dirac Specification -> - * 11.2 Picture prediction data. picture_prediction() - */ -static int dirac_unpack_prediction_parameters(DiracContext *s) -{ - static const uint8_t default_blen[] = { 4, 12, 16, 24 }; - static const uint8_t default_bsep[] = { 4, 8, 12, 16 }; - - GetBitContext *gb = &s->gb; - unsigned idx, ref; - - align_get_bits(gb); - /* [DIRAC_STD] 11.2.2 Block parameters. block_parameters() */ - /* Luma and Chroma are equal. 11.2.3 */ - idx = svq3_get_ue_golomb(gb); /* [DIRAC_STD] index */ - - if (idx > 4) { - av_log(s->avctx, AV_LOG_ERROR, "Block prediction index too high\n"); - return -1; - } - - if (idx == 0) { - s->plane[0].xblen = svq3_get_ue_golomb(gb); - s->plane[0].yblen = svq3_get_ue_golomb(gb); - s->plane[0].xbsep = svq3_get_ue_golomb(gb); - s->plane[0].ybsep = svq3_get_ue_golomb(gb); - } else { - /*[DIRAC_STD] preset_block_params(index). Table 11.1 */ - s->plane[0].xblen = default_blen[idx-1]; - s->plane[0].yblen = default_blen[idx-1]; - s->plane[0].xbsep = default_bsep[idx-1]; - s->plane[0].ybsep = default_bsep[idx-1]; - } - /*[DIRAC_STD] 11.2.4 motion_data_dimensions() - Calculated in function dirac_unpack_block_motion_data */ - - 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) { - av_log(s->avctx, AV_LOG_ERROR, "Block separation too small\n"); - return -1; - } - if (s->plane[0].xbsep > s->plane[0].xblen || s->plane[0].ybsep > s->plane[0].yblen) { - av_log(s->avctx, AV_LOG_ERROR, "Block separation greater than size\n"); - return -1; - } - if (FFMAX(s->plane[0].xblen, s->plane[0].yblen) > MAX_BLOCKSIZE) { - av_log(s->avctx, AV_LOG_ERROR, "Unsupported large block size\n"); - return -1; - } - - /*[DIRAC_STD] 11.2.5 Motion vector precision. motion_vector_precision() - Read motion vector precision */ - s->mv_precision = svq3_get_ue_golomb(gb); - if (s->mv_precision > 3) { - av_log(s->avctx, AV_LOG_ERROR, "MV precision finer than eighth-pel\n"); - return -1; - } - - /*[DIRAC_STD] 11.2.6 Global motion. global_motion() - Read the global motion compensation parameters */ - s->globalmc_flag = get_bits1(gb); - if (s->globalmc_flag) { - memset(s->globalmc, 0, sizeof(s->globalmc)); - /* [DIRAC_STD] pan_tilt(gparams) */ - for (ref = 0; ref < s->num_refs; ref++) { - if (get_bits1(gb)) { - s->globalmc[ref].pan_tilt[0] = dirac_get_se_golomb(gb); - s->globalmc[ref].pan_tilt[1] = dirac_get_se_golomb(gb); - } - /* [DIRAC_STD] zoom_rotate_shear(gparams) - zoom/rotation/shear parameters */ - if (get_bits1(gb)) { - s->globalmc[ref].zrs_exp = svq3_get_ue_golomb(gb); - s->globalmc[ref].zrs[0][0] = dirac_get_se_golomb(gb); - s->globalmc[ref].zrs[0][1] = dirac_get_se_golomb(gb); - s->globalmc[ref].zrs[1][0] = dirac_get_se_golomb(gb); - s->globalmc[ref].zrs[1][1] = dirac_get_se_golomb(gb); - } else { - s->globalmc[ref].zrs[0][0] = 1; - s->globalmc[ref].zrs[1][1] = 1; - } - /* [DIRAC_STD] perspective(gparams) */ - if (get_bits1(gb)) { - s->globalmc[ref].perspective_exp = svq3_get_ue_golomb(gb); - s->globalmc[ref].perspective[0] = dirac_get_se_golomb(gb); - s->globalmc[ref].perspective[1] = dirac_get_se_golomb(gb); - } - } - } - - /*[DIRAC_STD] 11.2.7 Picture prediction mode. prediction_mode() - Picture prediction mode, not currently used. */ - if (svq3_get_ue_golomb(gb)) { - av_log(s->avctx, AV_LOG_ERROR, "Unknown picture prediction mode\n"); - return -1; - } - - /* [DIRAC_STD] 11.2.8 Reference picture weight. reference_picture_weights() - just data read, weight calculation will be done later on. */ - s->weight_log2denom = 1; - s->weight[0] = 1; - s->weight[1] = 1; - - if (get_bits1(gb)) { - s->weight_log2denom = svq3_get_ue_golomb(gb); - s->weight[0] = dirac_get_se_golomb(gb); - if (s->num_refs == 2) - s->weight[1] = dirac_get_se_golomb(gb); - } - return 0; -} - -/** - * Dirac Specification -> - * 11.3 Wavelet transform data. wavelet_transform() - */ -static int dirac_unpack_idwt_params(DiracContext *s) -{ - GetBitContext *gb = &s->gb; - int i, level; - unsigned tmp; - -#define CHECKEDREAD(dst, cond, errmsg) \ - tmp = svq3_get_ue_golomb(gb); \ - if (cond) { \ - av_log(s->avctx, AV_LOG_ERROR, errmsg); \ - return -1; \ - }\ - dst = tmp; - - align_get_bits(gb); - - s->zero_res = s->num_refs ? get_bits1(gb) : 0; - if (s->zero_res) - return 0; - - /*[DIRAC_STD] 11.3.1 Transform parameters. transform_parameters() */ - CHECKEDREAD(s->wavelet_idx, tmp > 6, "wavelet_idx is too big\n") - - CHECKEDREAD(s->wavelet_depth, tmp > MAX_DWT_LEVELS || tmp < 1, "invalid number of DWT decompositions\n") - - if (!s->low_delay) { - /* Codeblock parameters (core syntax only) */ - if (get_bits1(gb)) { - for (i = 0; i <= s->wavelet_depth; i++) { - CHECKEDREAD(s->codeblock[i].width , tmp < 1, "codeblock width invalid\n") - CHECKEDREAD(s->codeblock[i].height, tmp < 1, "codeblock height invalid\n") - } - - CHECKEDREAD(s->codeblock_mode, tmp > 1, "unknown codeblock mode\n") - } else - for (i = 0; i <= s->wavelet_depth; i++) - s->codeblock[i].width = s->codeblock[i].height = 1; - } else { - /* Slice parameters + quantization matrix*/ - /*[DIRAC_STD] 11.3.4 Slice coding Parameters (low delay syntax only). slice_parameters() */ - s->lowdelay.num_x = svq3_get_ue_golomb(gb); - s->lowdelay.num_y = svq3_get_ue_golomb(gb); - s->lowdelay.bytes.num = svq3_get_ue_golomb(gb); - s->lowdelay.bytes.den = svq3_get_ue_golomb(gb); - - if (s->lowdelay.bytes.den <= 0) { - av_log(s->avctx,AV_LOG_ERROR,"Invalid lowdelay.bytes.den\n"); - return AVERROR_INVALIDDATA; - } - - /* [DIRAC_STD] 11.3.5 Quantisation matrices (low-delay syntax). quant_matrix() */ - if (get_bits1(gb)) { - av_log(s->avctx,AV_LOG_DEBUG,"Low Delay: Has Custom Quantization Matrix!\n"); - /* custom quantization matrix */ - s->lowdelay.quant[0][0] = svq3_get_ue_golomb(gb); - for (level = 0; level < s->wavelet_depth; level++) { - s->lowdelay.quant[level][1] = svq3_get_ue_golomb(gb); - s->lowdelay.quant[level][2] = svq3_get_ue_golomb(gb); - s->lowdelay.quant[level][3] = svq3_get_ue_golomb(gb); - } - } else { - if (s->wavelet_depth > 4) { - av_log(s->avctx,AV_LOG_ERROR,"Mandatory custom low delay matrix missing for depth %d\n", s->wavelet_depth); - return AVERROR_INVALIDDATA; - } - /* default quantization matrix */ - for (level = 0; level < s->wavelet_depth; level++) - for (i = 0; i < 4; i++) { - s->lowdelay.quant[level][i] = default_qmat[s->wavelet_idx][level][i]; - /* haar with no shift differs for different depths */ - if (s->wavelet_idx == 3) - s->lowdelay.quant[level][i] += 4*(s->wavelet_depth-1 - level); - } - } - } - return 0; -} - -static inline int pred_sbsplit(uint8_t *sbsplit, int stride, int x, int y) -{ - static const uint8_t avgsplit[7] = { 0, 0, 1, 1, 1, 2, 2 }; - - if (!(x|y)) - return 0; - else if (!y) - return sbsplit[-1]; - else if (!x) - return sbsplit[-stride]; - - return avgsplit[sbsplit[-1] + sbsplit[-stride] + sbsplit[-stride-1]]; -} - -static inline int pred_block_mode(DiracBlock *block, int stride, int x, int y, int refmask) -{ - int pred; - - if (!(x|y)) - return 0; - else if (!y) - return block[-1].ref & refmask; - else if (!x) - return block[-stride].ref & refmask; - - /* return the majority */ - pred = (block[-1].ref & refmask) + (block[-stride].ref & refmask) + (block[-stride-1].ref & refmask); - return (pred >> 1) & refmask; -} - -static inline void pred_block_dc(DiracBlock *block, int stride, int x, int y) -{ - int i, n = 0; - - memset(block->u.dc, 0, sizeof(block->u.dc)); - - if (x && !(block[-1].ref & 3)) { - for (i = 0; i < 3; i++) - block->u.dc[i] += block[-1].u.dc[i]; - n++; - } - - if (y && !(block[-stride].ref & 3)) { - for (i = 0; i < 3; i++) - block->u.dc[i] += block[-stride].u.dc[i]; - n++; - } - - if (x && y && !(block[-1-stride].ref & 3)) { - for (i = 0; i < 3; i++) - block->u.dc[i] += block[-1-stride].u.dc[i]; - n++; - } - - if (n == 2) { - for (i = 0; i < 3; i++) - block->u.dc[i] = (block->u.dc[i]+1)>>1; - } else if (n == 3) { - for (i = 0; i < 3; i++) - block->u.dc[i] = divide3(block->u.dc[i]); - } -} - -static inline void pred_mv(DiracBlock *block, int stride, int x, int y, int ref) -{ - int16_t *pred[3]; - int refmask = ref+1; - int mask = refmask | DIRAC_REF_MASK_GLOBAL; /* exclude gmc blocks */ - int n = 0; - - if (x && (block[-1].ref & mask) == refmask) - pred[n++] = block[-1].u.mv[ref]; - - if (y && (block[-stride].ref & mask) == refmask) - pred[n++] = block[-stride].u.mv[ref]; - - if (x && y && (block[-stride-1].ref & mask) == refmask) - pred[n++] = block[-stride-1].u.mv[ref]; - - switch (n) { - case 0: - block->u.mv[ref][0] = 0; - block->u.mv[ref][1] = 0; - break; - case 1: - block->u.mv[ref][0] = pred[0][0]; - block->u.mv[ref][1] = pred[0][1]; - break; - case 2: - block->u.mv[ref][0] = (pred[0][0] + pred[1][0] + 1) >> 1; - block->u.mv[ref][1] = (pred[0][1] + pred[1][1] + 1) >> 1; - break; - case 3: - block->u.mv[ref][0] = mid_pred(pred[0][0], pred[1][0], pred[2][0]); - block->u.mv[ref][1] = mid_pred(pred[0][1], pred[1][1], pred[2][1]); - break; - } -} - -static void global_mv(DiracContext *s, DiracBlock *block, int x, int y, int ref) -{ - int ez = s->globalmc[ref].zrs_exp; - int ep = s->globalmc[ref].perspective_exp; - int (*A)[2] = s->globalmc[ref].zrs; - int *b = s->globalmc[ref].pan_tilt; - int *c = s->globalmc[ref].perspective; - - int m = (1<u.mv[ref][0] = (mx + (1<<(ez+ep))) >> (ez+ep); - block->u.mv[ref][1] = (my + (1<<(ez+ep))) >> (ez+ep); -} - -static void decode_block_params(DiracContext *s, DiracArith arith[8], DiracBlock *block, - int stride, int x, int y) -{ - int i; - - block->ref = pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_REF1); - block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF1); - - if (s->num_refs == 2) { - block->ref |= pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_REF2); - block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF2) << 1; - } - - if (!block->ref) { - pred_block_dc(block, stride, x, y); - for (i = 0; i < 3; i++) - block->u.dc[i] += dirac_get_arith_int(arith+1+i, CTX_DC_F1, CTX_DC_DATA); - return; - } - - if (s->globalmc_flag) { - block->ref |= pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_GLOBAL); - block->ref ^= dirac_get_arith_bit(arith, CTX_GLOBAL_BLOCK) << 2; - } - - for (i = 0; i < s->num_refs; i++) - if (block->ref & (i+1)) { - if (block->ref & DIRAC_REF_MASK_GLOBAL) { - global_mv(s, block, x, y, i); - } else { - pred_mv(block, stride, x, y, i); - block->u.mv[i][0] += dirac_get_arith_int(arith + 4 + 2 * i, CTX_MV_F1, CTX_MV_DATA); - block->u.mv[i][1] += dirac_get_arith_int(arith + 5 + 2 * i, CTX_MV_F1, CTX_MV_DATA); - } - } -} - -/** - * Copies the current block to the other blocks covered by the current superblock split mode - */ -static void propagate_block_data(DiracBlock *block, int stride, int size) -{ - int x, y; - DiracBlock *dst = block; - - for (x = 1; x < size; x++) - dst[x] = *block; - - for (y = 1; y < size; y++) { - dst += stride; - for (x = 0; x < size; x++) - dst[x] = *block; - } -} - -/** - * Dirac Specification -> - * 12. Block motion data syntax - */ -static int dirac_unpack_block_motion_data(DiracContext *s) -{ - GetBitContext *gb = &s->gb; - uint8_t *sbsplit = s->sbsplit; - int i, x, y, q, p; - DiracArith arith[8]; - - align_get_bits(gb); - - /* [DIRAC_STD] 11.2.4 and 12.2.1 Number of blocks and superblocks */ - s->sbwidth = DIVRNDUP(s->source.width, 4*s->plane[0].xbsep); - s->sbheight = DIVRNDUP(s->source.height, 4*s->plane[0].ybsep); - s->blwidth = 4 * s->sbwidth; - s->blheight = 4 * s->sbheight; - - /* [DIRAC_STD] 12.3.1 Superblock splitting modes. superblock_split_modes() - decode superblock split modes */ - ff_dirac_init_arith_decoder(arith, gb, svq3_get_ue_golomb(gb)); /* svq3_get_ue_golomb(gb) is the length */ - for (y = 0; y < s->sbheight; y++) { - for (x = 0; x < s->sbwidth; x++) { - unsigned int split = dirac_get_arith_uint(arith, CTX_SB_F1, CTX_SB_DATA); - if (split > 2) - return -1; - sbsplit[x] = (split + pred_sbsplit(sbsplit+x, s->sbwidth, x, y)) % 3; - } - sbsplit += s->sbwidth; - } - - /* setup arith decoding */ - ff_dirac_init_arith_decoder(arith, gb, svq3_get_ue_golomb(gb)); - for (i = 0; i < s->num_refs; i++) { - ff_dirac_init_arith_decoder(arith + 4 + 2 * i, gb, svq3_get_ue_golomb(gb)); - ff_dirac_init_arith_decoder(arith + 5 + 2 * i, gb, svq3_get_ue_golomb(gb)); - } - for (i = 0; i < 3; i++) - ff_dirac_init_arith_decoder(arith+1+i, gb, svq3_get_ue_golomb(gb)); - - for (y = 0; y < s->sbheight; y++) - for (x = 0; x < s->sbwidth; x++) { - int blkcnt = 1 << s->sbsplit[y * s->sbwidth + x]; - int step = 4 >> s->sbsplit[y * s->sbwidth + x]; - - for (q = 0; q < blkcnt; q++) - for (p = 0; p < blkcnt; p++) { - int bx = 4 * x + p*step; - int by = 4 * y + q*step; - DiracBlock *block = &s->blmotion[by*s->blwidth + bx]; - decode_block_params(s, arith, block, s->blwidth, bx, by); - propagate_block_data(block, s->blwidth, step); - } - } - - return 0; -} - -static int weight(int i, int blen, int offset) -{ -#define ROLLOFF(i) offset == 1 ? ((i) ? 5 : 3) : \ - (1 + (6*(i) + offset - 1) / (2*offset - 1)) - - if (i < 2*offset) - return ROLLOFF(i); - else if (i > blen-1 - 2*offset) - return ROLLOFF(blen-1 - i); - return 8; -} - -static void init_obmc_weight_row(Plane *p, uint8_t *obmc_weight, int stride, - int left, int right, int wy) -{ - int x; - for (x = 0; left && x < p->xblen >> 1; x++) - obmc_weight[x] = wy*8; - for (; x < p->xblen >> right; x++) - obmc_weight[x] = wy*weight(x, p->xblen, p->xoffset); - for (; x < p->xblen; x++) - obmc_weight[x] = wy*8; - for (; x < stride; x++) - obmc_weight[x] = 0; -} - -static void init_obmc_weight(Plane *p, uint8_t *obmc_weight, int stride, - int left, int right, int top, int bottom) -{ - int y; - for (y = 0; top && y < p->yblen >> 1; y++) { - init_obmc_weight_row(p, obmc_weight, stride, left, right, 8); - obmc_weight += stride; - } - for (; y < p->yblen >> bottom; y++) { - int wy = weight(y, p->yblen, p->yoffset); - init_obmc_weight_row(p, obmc_weight, stride, left, right, wy); - obmc_weight += stride; - } - for (; y < p->yblen; y++) { - init_obmc_weight_row(p, obmc_weight, stride, left, right, 8); - obmc_weight += stride; - } -} - -static void init_obmc_weights(DiracContext *s, Plane *p, int by) -{ - int top = !by; - int bottom = by == s->blheight-1; - - /* don't bother re-initing for rows 2 to blheight-2, the weights don't change */ - if (top || bottom || by == 1) { - init_obmc_weight(p, s->obmc_weight[0], MAX_BLOCKSIZE, 1, 0, top, bottom); - init_obmc_weight(p, s->obmc_weight[1], MAX_BLOCKSIZE, 0, 0, top, bottom); - init_obmc_weight(p, s->obmc_weight[2], MAX_BLOCKSIZE, 0, 1, top, bottom); - } -} - -static const uint8_t epel_weights[4][4][4] = { - {{ 16, 0, 0, 0 }, - { 12, 4, 0, 0 }, - { 8, 8, 0, 0 }, - { 4, 12, 0, 0 }}, - {{ 12, 0, 4, 0 }, - { 9, 3, 3, 1 }, - { 6, 6, 2, 2 }, - { 3, 9, 1, 3 }}, - {{ 8, 0, 8, 0 }, - { 6, 2, 6, 2 }, - { 4, 4, 4, 4 }, - { 2, 6, 2, 6 }}, - {{ 4, 0, 12, 0 }, - { 3, 1, 9, 3 }, - { 2, 2, 6, 6 }, - { 1, 3, 3, 9 }} -}; - -/** - * For block x,y, determine which of the hpel planes to do bilinear - * interpolation from and set src[] to the location in each hpel plane - * to MC from. - * - * @return the index of the put_dirac_pixels_tab function to use - * 0 for 1 plane (fpel,hpel), 1 for 2 planes (qpel), 2 for 4 planes (qpel), and 3 for epel - */ -static int mc_subpel(DiracContext *s, DiracBlock *block, const uint8_t *src[5], - int x, int y, int ref, int plane) -{ - Plane *p = &s->plane[plane]; - uint8_t **ref_hpel = s->ref_pics[ref]->hpel[plane]; - int motion_x = block->u.mv[ref][0]; - int motion_y = block->u.mv[ref][1]; - int mx, my, i, epel, nplanes = 0; - - if (plane) { - motion_x >>= s->chroma_x_shift; - motion_y >>= s->chroma_y_shift; - } - - mx = motion_x & ~(-1 << s->mv_precision); - my = motion_y & ~(-1 << s->mv_precision); - motion_x >>= s->mv_precision; - motion_y >>= s->mv_precision; - /* normalize subpel coordinates to epel */ - /* TODO: template this function? */ - mx <<= 3 - s->mv_precision; - my <<= 3 - s->mv_precision; - - x += motion_x; - y += motion_y; - epel = (mx|my)&1; - - /* hpel position */ - if (!((mx|my)&3)) { - nplanes = 1; - src[0] = ref_hpel[(my>>1)+(mx>>2)] + y*p->stride + x; - } else { - /* qpel or epel */ - nplanes = 4; - for (i = 0; i < 4; i++) - src[i] = ref_hpel[i] + y*p->stride + x; - - /* if we're interpolating in the right/bottom halves, adjust the planes as needed - we increment x/y because the edge changes for half of the pixels */ - if (mx > 4) { - src[0] += 1; - src[2] += 1; - x++; - } - if (my > 4) { - src[0] += p->stride; - src[1] += p->stride; - y++; - } - - /* hpel planes are: - [0]: F [1]: H - [2]: V [3]: C */ - if (!epel) { - /* check if we really only need 2 planes since either mx or my is - a hpel position. (epel weights of 0 handle this there) */ - if (!(mx&3)) { - /* mx == 0: average [0] and [2] - mx == 4: average [1] and [3] */ - src[!mx] = src[2 + !!mx]; - nplanes = 2; - } else if (!(my&3)) { - src[0] = src[(my>>1) ]; - src[1] = src[(my>>1)+1]; - nplanes = 2; - } - } else { - /* adjust the ordering if needed so the weights work */ - if (mx > 4) { - FFSWAP(const uint8_t *, src[0], src[1]); - FFSWAP(const uint8_t *, src[2], src[3]); - } - if (my > 4) { - FFSWAP(const uint8_t *, src[0], src[2]); - FFSWAP(const uint8_t *, src[1], src[3]); - } - src[4] = epel_weights[my&3][mx&3]; - } - } - - /* fixme: v/h _edge_pos */ - if (x + p->xblen > p->width +EDGE_WIDTH/2 || - y + p->yblen > p->height+EDGE_WIDTH/2 || - x < 0 || y < 0) { - for (i = 0; i < nplanes; i++) { - ff_emulated_edge_mc(s->edge_emu_buffer[i], src[i], p->stride, - p->xblen, p->yblen, x, y, - p->width+EDGE_WIDTH/2, p->height+EDGE_WIDTH/2); - src[i] = s->edge_emu_buffer[i]; - } - } - return (nplanes>>1) + epel; -} - -static void add_dc(uint16_t *dst, int dc, int stride, - uint8_t *obmc_weight, int xblen, int yblen) -{ - int x, y; - dc += 128; - - for (y = 0; y < yblen; y++) { - for (x = 0; x < xblen; x += 2) { - dst[x ] += dc * obmc_weight[x ]; - dst[x+1] += dc * obmc_weight[x+1]; - } - dst += stride; - obmc_weight += MAX_BLOCKSIZE; - } -} - -static void block_mc(DiracContext *s, DiracBlock *block, - uint16_t *mctmp, uint8_t *obmc_weight, - int plane, int dstx, int dsty) -{ - Plane *p = &s->plane[plane]; - const uint8_t *src[5]; - int idx; - - switch (block->ref&3) { - case 0: /* DC */ - add_dc(mctmp, block->u.dc[plane], p->stride, obmc_weight, p->xblen, p->yblen); - return; - case 1: - case 2: - idx = mc_subpel(s, block, src, dstx, dsty, (block->ref&3)-1, plane); - s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen); - if (s->weight_func) - s->weight_func(s->mcscratch, p->stride, s->weight_log2denom, - s->weight[0] + s->weight[1], p->yblen); - break; - case 3: - idx = mc_subpel(s, block, src, dstx, dsty, 0, plane); - s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen); - idx = mc_subpel(s, block, src, dstx, dsty, 1, plane); - if (s->biweight_func) { - /* fixme: +32 is a quick hack */ - s->put_pixels_tab[idx](s->mcscratch + 32, src, p->stride, p->yblen); - s->biweight_func(s->mcscratch, s->mcscratch+32, p->stride, s->weight_log2denom, - s->weight[0], s->weight[1], p->yblen); - } else - s->avg_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen); - break; - } - s->add_obmc(mctmp, s->mcscratch, p->stride, obmc_weight, p->yblen); -} - -static void mc_row(DiracContext *s, DiracBlock *block, uint16_t *mctmp, int plane, int dsty) -{ - Plane *p = &s->plane[plane]; - int x, dstx = p->xbsep - p->xoffset; - - block_mc(s, block, mctmp, s->obmc_weight[0], plane, -p->xoffset, dsty); - mctmp += p->xbsep; - - for (x = 1; x < s->blwidth-1; x++) { - block_mc(s, block+x, mctmp, s->obmc_weight[1], plane, dstx, dsty); - dstx += p->xbsep; - mctmp += p->xbsep; - } - block_mc(s, block+x, mctmp, s->obmc_weight[2], plane, dstx, dsty); -} - -static void select_dsp_funcs(DiracContext *s, int width, int height, int xblen, int yblen) -{ - int idx = 0; - if (xblen > 8) - idx = 1; - if (xblen > 16) - idx = 2; - - memcpy(s->put_pixels_tab, s->diracdsp.put_dirac_pixels_tab[idx], sizeof(s->put_pixels_tab)); - memcpy(s->avg_pixels_tab, s->diracdsp.avg_dirac_pixels_tab[idx], sizeof(s->avg_pixels_tab)); - s->add_obmc = s->diracdsp.add_dirac_obmc[idx]; - if (s->weight_log2denom > 1 || s->weight[0] != 1 || s->weight[1] != 1) { - s->weight_func = s->diracdsp.weight_dirac_pixels_tab[idx]; - s->biweight_func = s->diracdsp.biweight_dirac_pixels_tab[idx]; - } else { - s->weight_func = NULL; - s->biweight_func = NULL; - } -} - -static void interpolate_refplane(DiracContext *s, DiracFrame *ref, int plane, int width, int height) -{ - /* chroma allocates an edge of 8 when subsampled - which for 4:2:2 means an h edge of 16 and v edge of 8 - just use 8 for everything for the moment */ - int i, edge = EDGE_WIDTH/2; - - ref->hpel[plane][0] = ref->avframe.data[plane]; - s->dsp.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 */ - - /* no need for hpel if we only have fpel vectors */ - if (!s->mv_precision) - return; - - for (i = 1; i < 4; i++) { - if (!ref->hpel_base[plane][i]) - ref->hpel_base[plane][i] = av_malloc((height+2*edge) * ref->avframe.linesize[plane] + 32); - /* we need to be 16-byte aligned even for chroma */ - ref->hpel[plane][i] = ref->hpel_base[plane][i] + edge*ref->avframe.linesize[plane] + 16; - } - - if (!ref->interpolated[plane]) { - s->diracdsp.dirac_hpel_filter(ref->hpel[plane][1], ref->hpel[plane][2], - ref->hpel[plane][3], ref->hpel[plane][0], - ref->avframe.linesize[plane], width, height); - s->dsp.draw_edges(ref->hpel[plane][1], ref->avframe.linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM); - s->dsp.draw_edges(ref->hpel[plane][2], ref->avframe.linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM); - s->dsp.draw_edges(ref->hpel[plane][3], ref->avframe.linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM); - } - ref->interpolated[plane] = 1; -} - -/** - * Dirac Specification -> - * 13.0 Transform data syntax. transform_data() - */ -static int dirac_decode_frame_internal(DiracContext *s) -{ - DWTContext d; - int y, i, comp, dsty; - - if (s->low_delay) { - /* [DIRAC_STD] 13.5.1 low_delay_transform_data() */ - for (comp = 0; comp < 3; comp++) { - Plane *p = &s->plane[comp]; - memset(p->idwt_buf, 0, p->idwt_stride * p->idwt_height * sizeof(IDWTELEM)); - } - if (!s->zero_res) - decode_lowdelay(s); - } - - for (comp = 0; comp < 3; comp++) { - Plane *p = &s->plane[comp]; - uint8_t *frame = s->current_picture->avframe.data[comp]; - - /* FIXME: small resolutions */ - for (i = 0; i < 4; i++) - s->edge_emu_buffer[i] = s->edge_emu_buffer_base + i*FFALIGN(p->width, 16); - - if (!s->zero_res && !s->low_delay) - { - memset(p->idwt_buf, 0, p->idwt_stride * p->idwt_height * sizeof(IDWTELEM)); - decode_component(s, comp); /* [DIRAC_STD] 13.4.1 core_transform_data() */ - } - if (ff_spatial_idwt_init2(&d, p->idwt_buf, p->idwt_width, p->idwt_height, p->idwt_stride, - s->wavelet_idx+2, s->wavelet_depth, p->idwt_tmp)) - return -1; - - if (!s->num_refs) { /* intra */ - for (y = 0; y < p->height; y += 16) { - ff_spatial_idwt_slice2(&d, y+16); /* decode */ - s->diracdsp.put_signed_rect_clamped(frame + y*p->stride, p->stride, - p->idwt_buf + y*p->idwt_stride, p->idwt_stride, p->width, 16); - } - } else { /* inter */ - int rowheight = p->ybsep*p->stride; - - select_dsp_funcs(s, p->width, p->height, p->xblen, p->yblen); - - for (i = 0; i < s->num_refs; i++) - interpolate_refplane(s, s->ref_pics[i], comp, p->width, p->height); - - memset(s->mctmp, 0, 4*p->yoffset*p->stride); - - dsty = -p->yoffset; - for (y = 0; y < s->blheight; y++) { - int h = 0, - start = FFMAX(dsty, 0); - uint16_t *mctmp = s->mctmp + y*rowheight; - DiracBlock *blocks = s->blmotion + y*s->blwidth; - - init_obmc_weights(s, p, y); - - if (y == s->blheight-1 || start+p->ybsep > p->height) - h = p->height - start; - else - h = p->ybsep - (start - dsty); - if (h < 0) - break; - - memset(mctmp+2*p->yoffset*p->stride, 0, 2*rowheight); - mc_row(s, blocks, mctmp, comp, dsty); - - mctmp += (start - dsty)*p->stride + p->xoffset; - ff_spatial_idwt_slice2(&d, start + h); /* decode */ - s->diracdsp.add_rect_clamped(frame + start*p->stride, mctmp, p->stride, - p->idwt_buf + start*p->idwt_stride, p->idwt_stride, p->width, h); - - dsty += p->ybsep; - } - } - } - - - return 0; -} - -/** - * Dirac Specification -> - * 11.1.1 Picture Header. picture_header() - */ -static int dirac_decode_picture_header(DiracContext *s) -{ - int retire, picnum; - int i, j, refnum, refdist; - GetBitContext *gb = &s->gb; - - /* [DIRAC_STD] 11.1.1 Picture Header. picture_header() PICTURE_NUM */ - picnum = s->current_picture->avframe.display_picture_number = get_bits_long(gb, 32); - - - av_log(s->avctx,AV_LOG_DEBUG,"PICTURE_NUM: %d\n",picnum); - - /* if this is the first keyframe after a sequence header, start our - reordering from here */ - if (s->frame_number < 0) - s->frame_number = picnum; - - s->ref_pics[0] = s->ref_pics[1] = NULL; - for (i = 0; i < s->num_refs; i++) { - refnum = picnum + dirac_get_se_golomb(gb); - refdist = INT_MAX; - - /* find the closest reference to the one we want */ - /* Jordi: this is needed if the referenced picture hasn't yet arrived */ - for (j = 0; j < MAX_REFERENCE_FRAMES && refdist; j++) - if (s->ref_frames[j] - && FFABS(s->ref_frames[j]->avframe.display_picture_number - refnum) < refdist) { - s->ref_pics[i] = s->ref_frames[j]; - refdist = FFABS(s->ref_frames[j]->avframe.display_picture_number - refnum); - } - - if (!s->ref_pics[i] || refdist) - av_log(s->avctx, AV_LOG_DEBUG, "Reference not found\n"); - - /* if there were no references at all, allocate one */ - if (!s->ref_pics[i]) - for (j = 0; j < MAX_FRAMES; j++) - if (!s->all_frames[j].avframe.data[0]) { - s->ref_pics[i] = &s->all_frames[j]; - ff_get_buffer(s->avctx, &s->ref_pics[i]->avframe, AV_GET_BUFFER_FLAG_REF); - break; - } - } - - /* retire the reference frames that are not used anymore */ - if (s->current_picture->avframe.reference) { - retire = picnum + dirac_get_se_golomb(gb); - if (retire != picnum) { - DiracFrame *retire_pic = remove_frame(s->ref_frames, retire); - - if (retire_pic) - retire_pic->avframe.reference &= DELAYED_PIC_REF; - else - av_log(s->avctx, AV_LOG_DEBUG, "Frame to retire not found\n"); - } - - /* if reference array is full, remove the oldest as per the spec */ - while (add_frame(s->ref_frames, MAX_REFERENCE_FRAMES, s->current_picture)) { - av_log(s->avctx, AV_LOG_ERROR, "Reference frame overflow\n"); - remove_frame(s->ref_frames, s->ref_frames[0]->avframe.display_picture_number)->avframe.reference &= DELAYED_PIC_REF; - } - } - - if (s->num_refs) { - if (dirac_unpack_prediction_parameters(s)) /* [DIRAC_STD] 11.2 Picture Prediction Data. picture_prediction() */ - return -1; - if (dirac_unpack_block_motion_data(s)) /* [DIRAC_STD] 12. Block motion data syntax */ - return -1; - } - if (dirac_unpack_idwt_params(s)) /* [DIRAC_STD] 11.3 Wavelet transform data */ - return -1; - - init_planes(s); - return 0; -} - -static int get_delayed_pic(DiracContext *s, AVFrame *picture, int *got_frame) -{ - DiracFrame *out = s->delay_frames[0]; - int i, out_idx = 0; - int ret; - - /* find frame with lowest picture number */ - for (i = 1; s->delay_frames[i]; i++) - if (s->delay_frames[i]->avframe.display_picture_number < out->avframe.display_picture_number) { - out = s->delay_frames[i]; - out_idx = i; - } - - for (i = out_idx; s->delay_frames[i]; i++) - s->delay_frames[i] = s->delay_frames[i+1]; - - if (out) { - out->avframe.reference ^= DELAYED_PIC_REF; - *got_frame = 1; - if((ret = av_frame_ref(picture, &out->avframe)) < 0) - return ret; - } - - return 0; -} - -/** - * Dirac Specification -> - * 9.6 Parse Info Header Syntax. parse_info() - * 4 byte start code + byte parse code + 4 byte size + 4 byte previous size - */ -#define DATA_UNIT_HEADER_SIZE 13 - -/* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3 - inside the function parse_sequence() */ -static int dirac_decode_data_unit(AVCodecContext *avctx, const uint8_t *buf, int size) -{ - DiracContext *s = avctx->priv_data; - DiracFrame *pic = NULL; - int ret, i, parse_code = buf[4]; - unsigned tmp; - - if (size < DATA_UNIT_HEADER_SIZE) - return -1; - - init_get_bits(&s->gb, &buf[13], 8*(size - DATA_UNIT_HEADER_SIZE)); - - if (parse_code == pc_seq_header) { - if (s->seen_sequence_header) - return 0; - - /* [DIRAC_STD] 10. Sequence header */ - if (avpriv_dirac_parse_sequence_header(avctx, &s->gb, &s->source)) - return -1; - - avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift); - - if (alloc_sequence_buffers(s)) - return -1; - - s->seen_sequence_header = 1; - } else if (parse_code == pc_eos) { /* [DIRAC_STD] End of Sequence */ - free_sequence_buffers(s); - s->seen_sequence_header = 0; - } else if (parse_code == pc_aux_data) { - if (buf[13] == 1) { /* encoder implementation/version */ - int ver[3]; - /* versions older than 1.0.8 don't store quant delta for - subbands with only one codeblock */ - if (sscanf(buf+14, "Schroedinger %d.%d.%d", ver, ver+1, ver+2) == 3) - if (ver[0] == 1 && ver[1] == 0 && ver[2] <= 7) - s->old_delta_quant = 1; - } - } else if (parse_code & 0x8) { /* picture data unit */ - if (!s->seen_sequence_header) { - av_log(avctx, AV_LOG_DEBUG, "Dropping frame without sequence header\n"); - return -1; - } - - /* find an unused frame */ - for (i = 0; i < MAX_FRAMES; i++) - if (s->all_frames[i].avframe.data[0] == NULL) - pic = &s->all_frames[i]; - if (!pic) { - av_log(avctx, AV_LOG_ERROR, "framelist full\n"); - return -1; - } - - avcodec_get_frame_defaults(&pic->avframe); - - /* [DIRAC_STD] Defined in 9.6.1 ... */ - tmp = parse_code & 0x03; /* [DIRAC_STD] num_refs() */ - if (tmp > 2) { - av_log(avctx, AV_LOG_ERROR, "num_refs of 3\n"); - return -1; - } - s->num_refs = tmp; - s->is_arith = (parse_code & 0x48) == 0x08; /* [DIRAC_STD] using_ac() */ - s->low_delay = (parse_code & 0x88) == 0x88; /* [DIRAC_STD] is_low_delay() */ - pic->avframe.reference = (parse_code & 0x0C) == 0x0C; /* [DIRAC_STD] is_reference() */ - pic->avframe.key_frame = s->num_refs == 0; /* [DIRAC_STD] is_intra() */ - pic->avframe.pict_type = s->num_refs + 1; /* Definition of AVPictureType in avutil.h */ - - if ((ret = ff_get_buffer(avctx, &pic->avframe, (parse_code & 0x0C) == 0x0C ? AV_GET_BUFFER_FLAG_REF : 0)) < 0) - return ret; - s->current_picture = pic; - s->plane[0].stride = pic->avframe.linesize[0]; - s->plane[1].stride = pic->avframe.linesize[1]; - s->plane[2].stride = pic->avframe.linesize[2]; - - /* [DIRAC_STD] 11.1 Picture parse. picture_parse() */ - if (dirac_decode_picture_header(s)) - return -1; - - /* [DIRAC_STD] 13.0 Transform data syntax. transform_data() */ - if (dirac_decode_frame_internal(s)) - return -1; - } - return 0; -} - -static int dirac_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *pkt) -{ - DiracContext *s = avctx->priv_data; - DiracFrame *picture = data; - uint8_t *buf = pkt->data; - int buf_size = pkt->size; - int i, data_unit_size, buf_idx = 0; - int ret; - - /* release unused frames */ - for (i = 0; i < MAX_FRAMES; i++) - if (s->all_frames[i].avframe.data[0] && !s->all_frames[i].avframe.reference) { - av_frame_unref(&s->all_frames[i].avframe); - memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated)); - } - - s->current_picture = NULL; - *got_frame = 0; - - /* end of stream, so flush delayed pics */ - if (buf_size == 0) - return get_delayed_pic(s, (AVFrame *)data, got_frame); - - for (;;) { - /*[DIRAC_STD] Here starts the code from parse_info() defined in 9.6 - [DIRAC_STD] PARSE_INFO_PREFIX = "BBCD" as defined in ISO/IEC 646 - BBCD start code search */ - for (; buf_idx + DATA_UNIT_HEADER_SIZE < buf_size; buf_idx++) { - if (buf[buf_idx ] == 'B' && buf[buf_idx+1] == 'B' && - buf[buf_idx+2] == 'C' && buf[buf_idx+3] == 'D') - break; - } - /* BBCD found or end of data */ - if (buf_idx + DATA_UNIT_HEADER_SIZE >= buf_size) - break; - - data_unit_size = AV_RB32(buf+buf_idx+5); - if (buf_idx + data_unit_size > buf_size || !data_unit_size) { - if(buf_idx + data_unit_size > buf_size) - av_log(s->avctx, AV_LOG_ERROR, - "Data unit with size %d is larger than input buffer, discarding\n", - data_unit_size); - buf_idx += 4; - continue; - } - /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3 inside the function parse_sequence() */ - if (dirac_decode_data_unit(avctx, buf+buf_idx, data_unit_size)) - { - av_log(s->avctx, AV_LOG_ERROR,"Error in dirac_decode_data_unit\n"); - return -1; - } - buf_idx += data_unit_size; - } - - if (!s->current_picture) - return buf_size; - - if (s->current_picture->avframe.display_picture_number > s->frame_number) { - DiracFrame *delayed_frame = remove_frame(s->delay_frames, s->frame_number); - - s->current_picture->avframe.reference |= DELAYED_PIC_REF; - - if (add_frame(s->delay_frames, MAX_DELAY, s->current_picture)) { - int min_num = s->delay_frames[0]->avframe.display_picture_number; - /* Too many delayed frames, so we display the frame with the lowest pts */ - av_log(avctx, AV_LOG_ERROR, "Delay frame overflow\n"); - delayed_frame = s->delay_frames[0]; - - for (i = 1; s->delay_frames[i]; i++) - if (s->delay_frames[i]->avframe.display_picture_number < min_num) - min_num = s->delay_frames[i]->avframe.display_picture_number; - - delayed_frame = remove_frame(s->delay_frames, min_num); - add_frame(s->delay_frames, MAX_DELAY, s->current_picture); - } - - if (delayed_frame) { - delayed_frame->avframe.reference ^= DELAYED_PIC_REF; - if((ret=av_frame_ref(data, &delayed_frame->avframe)) < 0) - return ret; - *got_frame = 1; - } - } else if (s->current_picture->avframe.display_picture_number == s->frame_number) { - /* The right frame at the right time :-) */ - if((ret=av_frame_ref(data, &s->current_picture->avframe)) < 0) - return ret; - *got_frame = 1; - } - - if (*got_frame) - s->frame_number = picture->avframe.display_picture_number + 1; - - return buf_idx; -} - -AVCodec ff_dirac_decoder = { - .name = "dirac", - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_DIRAC, - .priv_data_size = sizeof(DiracContext), - .init = dirac_decode_init, - .close = dirac_decode_end, - .decode = dirac_decode_frame, - .capabilities = CODEC_CAP_DELAY, - .flush = dirac_decode_flush, - .long_name = NULL_IF_CONFIG_SMALL("BBC Dirac VC-2"), -}; -- cgit v1.2.3