| /* |
| * Duck/ON2 TrueMotion 2 Decoder |
| * Copyright (c) 2005 Konstantin Shishkov |
| * |
| * 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 libavcodec/truemotion2.c |
| * Duck TrueMotion2 decoder. |
| */ |
| |
| #include "avcodec.h" |
| #include "bitstream.h" |
| #include "dsputil.h" |
| |
| #define TM2_ESCAPE 0x80000000 |
| #define TM2_DELTAS 64 |
| /* Huffman-coded streams of different types of blocks */ |
| enum TM2_STREAMS{ TM2_C_HI = 0, TM2_C_LO, TM2_L_HI, TM2_L_LO, |
| TM2_UPD, TM2_MOT, TM2_TYPE, TM2_NUM_STREAMS}; |
| /* Block types */ |
| enum TM2_BLOCKS{ TM2_HI_RES = 0, TM2_MED_RES, TM2_LOW_RES, TM2_NULL_RES, |
| TM2_UPDATE, TM2_STILL, TM2_MOTION}; |
| |
| typedef struct TM2Context{ |
| AVCodecContext *avctx; |
| AVFrame pic; |
| |
| GetBitContext gb; |
| DSPContext dsp; |
| |
| /* TM2 streams */ |
| int *tokens[TM2_NUM_STREAMS]; |
| int tok_lens[TM2_NUM_STREAMS]; |
| int tok_ptrs[TM2_NUM_STREAMS]; |
| int deltas[TM2_NUM_STREAMS][TM2_DELTAS]; |
| /* for blocks decoding */ |
| int D[4]; |
| int CD[4]; |
| int *last; |
| int *clast; |
| |
| /* data for current and previous frame */ |
| int *Y1, *U1, *V1, *Y2, *U2, *V2; |
| int cur; |
| } TM2Context; |
| |
| /** |
| * Huffman codes for each of streams |
| */ |
| typedef struct TM2Codes{ |
| VLC vlc; ///< table for FFmpeg bitstream reader |
| int bits; |
| int *recode; ///< table for converting from code indexes to values |
| int length; |
| } TM2Codes; |
| |
| /** |
| * structure for gathering Huffman codes information |
| */ |
| typedef struct TM2Huff{ |
| int val_bits; ///< length of literal |
| int max_bits; ///< maximum length of code |
| int min_bits; ///< minimum length of code |
| int nodes; ///< total number of nodes in tree |
| int num; ///< current number filled |
| int max_num; ///< total number of codes |
| int *nums; ///< literals |
| uint32_t *bits; ///< codes |
| int *lens; ///< codelengths |
| } TM2Huff; |
| |
| static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff) |
| { |
| if(length > huff->max_bits) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n", huff->max_bits); |
| return -1; |
| } |
| |
| if(!get_bits1(&ctx->gb)) { /* literal */ |
| if (length == 0) { |
| length = 1; |
| } |
| if(huff->num >= huff->max_num) { |
| av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n"); |
| return -1; |
| } |
| huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits); |
| huff->bits[huff->num] = prefix; |
| huff->lens[huff->num] = length; |
| huff->num++; |
| return 0; |
| } else { /* non-terminal node */ |
| if(tm2_read_tree(ctx, prefix << 1, length + 1, huff) == -1) |
| return -1; |
| if(tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff) == -1) |
| return -1; |
| } |
| return 0; |
| } |
| |
| static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code) |
| { |
| TM2Huff huff; |
| int res = 0; |
| |
| huff.val_bits = get_bits(&ctx->gb, 5); |
| huff.max_bits = get_bits(&ctx->gb, 5); |
| huff.min_bits = get_bits(&ctx->gb, 5); |
| huff.nodes = get_bits_long(&ctx->gb, 17); |
| huff.num = 0; |
| |
| /* check for correct codes parameters */ |
| if((huff.val_bits < 1) || (huff.val_bits > 32) || |
| (huff.max_bits < 0) || (huff.max_bits > 32)) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal length: %i, max code length: %i\n", |
| huff.val_bits, huff.max_bits); |
| return -1; |
| } |
| if((huff.nodes < 0) || (huff.nodes > 0x10000)) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree nodes: %i\n", huff.nodes); |
| return -1; |
| } |
| /* one-node tree */ |
| if(huff.max_bits == 0) |
| huff.max_bits = 1; |
| |
| /* allocate space for codes - it is exactly ceil(nodes / 2) entries */ |
| huff.max_num = (huff.nodes + 1) >> 1; |
| huff.nums = av_mallocz(huff.max_num * sizeof(int)); |
| huff.bits = av_mallocz(huff.max_num * sizeof(uint32_t)); |
| huff.lens = av_mallocz(huff.max_num * sizeof(int)); |
| |
| if(tm2_read_tree(ctx, 0, 0, &huff) == -1) |
| res = -1; |
| |
| if(huff.num != huff.max_num) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n", |
| huff.num, huff.max_num); |
| res = -1; |
| } |
| |
| /* convert codes to vlc_table */ |
| if(res != -1) { |
| int i; |
| |
| res = init_vlc(&code->vlc, huff.max_bits, huff.max_num, |
| huff.lens, sizeof(int), sizeof(int), |
| huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0); |
| if(res < 0) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n"); |
| res = -1; |
| } else |
| res = 0; |
| if(res != -1) { |
| code->bits = huff.max_bits; |
| code->length = huff.max_num; |
| code->recode = av_malloc(code->length * sizeof(int)); |
| for(i = 0; i < code->length; i++) |
| code->recode[i] = huff.nums[i]; |
| } |
| } |
| /* free allocated memory */ |
| av_free(huff.nums); |
| av_free(huff.bits); |
| av_free(huff.lens); |
| |
| return res; |
| } |
| |
| static void tm2_free_codes(TM2Codes *code) |
| { |
| if(code->recode) |
| av_free(code->recode); |
| if(code->vlc.table) |
| free_vlc(&code->vlc); |
| } |
| |
| static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code) |
| { |
| int val; |
| val = get_vlc2(gb, code->vlc.table, code->bits, 1); |
| return code->recode[val]; |
| } |
| |
| static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf) |
| { |
| uint32_t magic; |
| const uint8_t *obuf; |
| int length; |
| |
| obuf = buf; |
| |
| magic = AV_RL32(buf); |
| buf += 4; |
| |
| if(magic == 0x00000100) { /* old header */ |
| /* av_log (ctx->avctx, AV_LOG_ERROR, "TM2 old header: not implemented (yet)\n"); */ |
| return 40; |
| } else if(magic == 0x00000101) { /* new header */ |
| int w, h, size, flags, xr, yr; |
| |
| length = AV_RL32(buf); |
| buf += 4; |
| |
| init_get_bits(&ctx->gb, buf, 32 * 8); |
| size = get_bits_long(&ctx->gb, 31); |
| h = get_bits(&ctx->gb, 15); |
| w = get_bits(&ctx->gb, 15); |
| flags = get_bits_long(&ctx->gb, 31); |
| yr = get_bits(&ctx->gb, 9); |
| xr = get_bits(&ctx->gb, 9); |
| |
| return 40; |
| } else { |
| av_log (ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic); |
| return -1; |
| } |
| |
| return buf - obuf; |
| } |
| |
| static int tm2_read_deltas(TM2Context *ctx, int stream_id) { |
| int d, mb; |
| int i, v; |
| |
| d = get_bits(&ctx->gb, 9); |
| mb = get_bits(&ctx->gb, 5); |
| |
| if((d < 1) || (d > TM2_DELTAS) || (mb < 1) || (mb > 32)) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb); |
| return -1; |
| } |
| |
| for(i = 0; i < d; i++) { |
| v = get_bits_long(&ctx->gb, mb); |
| if(v & (1 << (mb - 1))) |
| ctx->deltas[stream_id][i] = v - (1 << mb); |
| else |
| ctx->deltas[stream_id][i] = v; |
| } |
| for(; i < TM2_DELTAS; i++) |
| ctx->deltas[stream_id][i] = 0; |
| |
| return 0; |
| } |
| |
| static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id) { |
| int i; |
| int cur = 0; |
| int skip = 0; |
| int len, toks; |
| TM2Codes codes; |
| |
| /* get stream length in dwords */ |
| len = AV_RB32(buf); buf += 4; cur += 4; |
| skip = len * 4 + 4; |
| |
| if(len == 0) |
| return 4; |
| |
| toks = AV_RB32(buf); buf += 4; cur += 4; |
| if(toks & 1) { |
| len = AV_RB32(buf); buf += 4; cur += 4; |
| if(len == TM2_ESCAPE) { |
| len = AV_RB32(buf); buf += 4; cur += 4; |
| } |
| if(len > 0) { |
| init_get_bits(&ctx->gb, buf, (skip - cur) * 8); |
| if(tm2_read_deltas(ctx, stream_id) == -1) |
| return -1; |
| buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2; |
| cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2; |
| } |
| } |
| /* skip unused fields */ |
| if(AV_RB32(buf) == TM2_ESCAPE) { |
| buf += 4; cur += 4; /* some unknown length - could be escaped too */ |
| } |
| buf += 4; cur += 4; |
| buf += 4; cur += 4; /* unused by decoder */ |
| |
| init_get_bits(&ctx->gb, buf, (skip - cur) * 8); |
| if(tm2_build_huff_table(ctx, &codes) == -1) |
| return -1; |
| buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2; |
| cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2; |
| |
| toks >>= 1; |
| /* check if we have sane number of tokens */ |
| if((toks < 0) || (toks > 0xFFFFFF)){ |
| av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks); |
| tm2_free_codes(&codes); |
| return -1; |
| } |
| ctx->tokens[stream_id] = av_realloc(ctx->tokens[stream_id], toks * sizeof(int)); |
| ctx->tok_lens[stream_id] = toks; |
| len = AV_RB32(buf); buf += 4; cur += 4; |
| if(len > 0) { |
| init_get_bits(&ctx->gb, buf, (skip - cur) * 8); |
| for(i = 0; i < toks; i++) |
| ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes); |
| } else { |
| for(i = 0; i < toks; i++) |
| ctx->tokens[stream_id][i] = codes.recode[0]; |
| } |
| tm2_free_codes(&codes); |
| |
| return skip; |
| } |
| |
| static inline int GET_TOK(TM2Context *ctx,int type) { |
| if(ctx->tok_ptrs[type] >= ctx->tok_lens[type]) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "Read token from stream %i out of bounds (%i>=%i)\n", type, ctx->tok_ptrs[type], ctx->tok_lens[type]); |
| return 0; |
| } |
| if(type <= TM2_MOT) |
| return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]]; |
| return ctx->tokens[type][ctx->tok_ptrs[type]++]; |
| } |
| |
| /* blocks decoding routines */ |
| |
| /* common Y, U, V pointers initialisation */ |
| #define TM2_INIT_POINTERS() \ |
| int *last, *clast; \ |
| int *Y, *U, *V;\ |
| int Ystride, Ustride, Vstride;\ |
| \ |
| Ystride = ctx->avctx->width;\ |
| Vstride = (ctx->avctx->width + 1) >> 1;\ |
| Ustride = (ctx->avctx->width + 1) >> 1;\ |
| Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\ |
| V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\ |
| U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\ |
| last = ctx->last + bx * 4;\ |
| clast = ctx->clast + bx * 4; |
| |
| #define TM2_INIT_POINTERS_2() \ |
| int *Yo, *Uo, *Vo;\ |
| int oYstride, oUstride, oVstride;\ |
| \ |
| TM2_INIT_POINTERS();\ |
| oYstride = Ystride;\ |
| oVstride = Vstride;\ |
| oUstride = Ustride;\ |
| Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\ |
| Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\ |
| Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2; |
| |
| /* recalculate last and delta values for next blocks */ |
| #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\ |
| CD[0] = (CHR[1] - 128) - last[1];\ |
| CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\ |
| last[0] = (int)CHR[stride + 0] - 128;\ |
| last[1] = (int)CHR[stride + 1] - 128;} |
| |
| /* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */ |
| static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last) |
| { |
| int ct, d; |
| int i, j; |
| |
| for(j = 0; j < 4; j++){ |
| ct = ctx->D[j]; |
| for(i = 0; i < 4; i++){ |
| d = deltas[i + j * 4]; |
| ct += d; |
| last[i] += ct; |
| Y[i] = av_clip_uint8(last[i]); |
| } |
| Y += stride; |
| ctx->D[j] = ct; |
| } |
| } |
| |
| static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas) |
| { |
| int i, j; |
| for(j = 0; j < 2; j++){ |
| for(i = 0; i < 2; i++){ |
| CD[j] += deltas[i + j * 2]; |
| last[i] += CD[j]; |
| data[i] = last[i] + 128; |
| } |
| data += stride; |
| } |
| } |
| |
| static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx) |
| { |
| int t; |
| int l; |
| int prev; |
| |
| if(bx > 0) |
| prev = clast[-3]; |
| else |
| prev = 0; |
| t = (CD[0] + CD[1]) >> 1; |
| l = (prev - CD[0] - CD[1] + clast[1]) >> 1; |
| CD[1] = CD[0] + CD[1] - t; |
| CD[0] = t; |
| clast[0] = l; |
| |
| tm2_high_chroma(data, stride, clast, CD, deltas); |
| } |
| |
| static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by) |
| { |
| int i; |
| int deltas[16]; |
| TM2_INIT_POINTERS(); |
| |
| /* hi-res chroma */ |
| for(i = 0; i < 4; i++) { |
| deltas[i] = GET_TOK(ctx, TM2_C_HI); |
| deltas[i + 4] = GET_TOK(ctx, TM2_C_HI); |
| } |
| tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas); |
| tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4); |
| |
| /* hi-res luma */ |
| for(i = 0; i < 16; i++) |
| deltas[i] = GET_TOK(ctx, TM2_L_HI); |
| |
| tm2_apply_deltas(ctx, Y, Ystride, deltas, last); |
| } |
| |
| static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by) |
| { |
| int i; |
| int deltas[16]; |
| TM2_INIT_POINTERS(); |
| |
| /* low-res chroma */ |
| deltas[0] = GET_TOK(ctx, TM2_C_LO); |
| deltas[1] = deltas[2] = deltas[3] = 0; |
| tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx); |
| |
| deltas[0] = GET_TOK(ctx, TM2_C_LO); |
| deltas[1] = deltas[2] = deltas[3] = 0; |
| tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx); |
| |
| /* hi-res luma */ |
| for(i = 0; i < 16; i++) |
| deltas[i] = GET_TOK(ctx, TM2_L_HI); |
| |
| tm2_apply_deltas(ctx, Y, Ystride, deltas, last); |
| } |
| |
| static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by) |
| { |
| int i; |
| int t1, t2; |
| int deltas[16]; |
| TM2_INIT_POINTERS(); |
| |
| /* low-res chroma */ |
| deltas[0] = GET_TOK(ctx, TM2_C_LO); |
| deltas[1] = deltas[2] = deltas[3] = 0; |
| tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx); |
| |
| deltas[0] = GET_TOK(ctx, TM2_C_LO); |
| deltas[1] = deltas[2] = deltas[3] = 0; |
| tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx); |
| |
| /* low-res luma */ |
| for(i = 0; i < 16; i++) |
| deltas[i] = 0; |
| |
| deltas[ 0] = GET_TOK(ctx, TM2_L_LO); |
| deltas[ 2] = GET_TOK(ctx, TM2_L_LO); |
| deltas[ 8] = GET_TOK(ctx, TM2_L_LO); |
| deltas[10] = GET_TOK(ctx, TM2_L_LO); |
| |
| if(bx > 0) |
| last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1; |
| else |
| last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1; |
| last[2] = (last[1] + last[3]) >> 1; |
| |
| t1 = ctx->D[0] + ctx->D[1]; |
| ctx->D[0] = t1 >> 1; |
| ctx->D[1] = t1 - (t1 >> 1); |
| t2 = ctx->D[2] + ctx->D[3]; |
| ctx->D[2] = t2 >> 1; |
| ctx->D[3] = t2 - (t2 >> 1); |
| |
| tm2_apply_deltas(ctx, Y, Ystride, deltas, last); |
| } |
| |
| static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by) |
| { |
| int i; |
| int ct; |
| int left, right, diff; |
| int deltas[16]; |
| TM2_INIT_POINTERS(); |
| |
| /* null chroma */ |
| deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0; |
| tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx); |
| |
| deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0; |
| tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx); |
| |
| /* null luma */ |
| for(i = 0; i < 16; i++) |
| deltas[i] = 0; |
| |
| ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3]; |
| |
| if(bx > 0) |
| left = last[-1] - ct; |
| else |
| left = 0; |
| |
| right = last[3]; |
| diff = right - left; |
| last[0] = left + (diff >> 2); |
| last[1] = left + (diff >> 1); |
| last[2] = right - (diff >> 2); |
| last[3] = right; |
| { |
| int tp = left; |
| |
| ctx->D[0] = (tp + (ct >> 2)) - left; |
| left += ctx->D[0]; |
| ctx->D[1] = (tp + (ct >> 1)) - left; |
| left += ctx->D[1]; |
| ctx->D[2] = ((tp + ct) - (ct >> 2)) - left; |
| left += ctx->D[2]; |
| ctx->D[3] = (tp + ct) - left; |
| } |
| tm2_apply_deltas(ctx, Y, Ystride, deltas, last); |
| } |
| |
| static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by) |
| { |
| int i, j; |
| TM2_INIT_POINTERS_2(); |
| |
| /* update chroma */ |
| for(j = 0; j < 2; j++){ |
| for(i = 0; i < 2; i++){ |
| U[i] = Uo[i]; |
| V[i] = Vo[i]; |
| } |
| U += Ustride; V += Vstride; |
| Uo += oUstride; Vo += oVstride; |
| } |
| U -= Ustride * 2; |
| V -= Vstride * 2; |
| TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD); |
| TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2)); |
| |
| /* update deltas */ |
| ctx->D[0] = Yo[3] - last[3]; |
| ctx->D[1] = Yo[3 + oYstride] - Yo[3]; |
| ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride]; |
| ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2]; |
| |
| for(j = 0; j < 4; j++){ |
| for(i = 0; i < 4; i++){ |
| Y[i] = Yo[i]; |
| last[i] = Yo[i]; |
| } |
| Y += Ystride; |
| Yo += oYstride; |
| } |
| } |
| |
| static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by) |
| { |
| int i, j; |
| int d; |
| TM2_INIT_POINTERS_2(); |
| |
| /* update chroma */ |
| for(j = 0; j < 2; j++){ |
| for(i = 0; i < 2; i++){ |
| U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD); |
| V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD); |
| } |
| U += Ustride; V += Vstride; |
| Uo += oUstride; Vo += oVstride; |
| } |
| U -= Ustride * 2; |
| V -= Vstride * 2; |
| TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD); |
| TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2)); |
| |
| /* update deltas */ |
| ctx->D[0] = Yo[3] - last[3]; |
| ctx->D[1] = Yo[3 + oYstride] - Yo[3]; |
| ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride]; |
| ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2]; |
| |
| for(j = 0; j < 4; j++){ |
| d = last[3]; |
| for(i = 0; i < 4; i++){ |
| Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD); |
| last[i] = Y[i]; |
| } |
| ctx->D[j] = last[3] - d; |
| Y += Ystride; |
| Yo += oYstride; |
| } |
| } |
| |
| static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by) |
| { |
| int i, j; |
| int mx, my; |
| TM2_INIT_POINTERS_2(); |
| |
| mx = GET_TOK(ctx, TM2_MOT); |
| my = GET_TOK(ctx, TM2_MOT); |
| |
| Yo += my * oYstride + mx; |
| Uo += (my >> 1) * oUstride + (mx >> 1); |
| Vo += (my >> 1) * oVstride + (mx >> 1); |
| |
| /* copy chroma */ |
| for(j = 0; j < 2; j++){ |
| for(i = 0; i < 2; i++){ |
| U[i] = Uo[i]; |
| V[i] = Vo[i]; |
| } |
| U += Ustride; V += Vstride; |
| Uo += oUstride; Vo += oVstride; |
| } |
| U -= Ustride * 2; |
| V -= Vstride * 2; |
| TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD); |
| TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2)); |
| |
| /* copy luma */ |
| for(j = 0; j < 4; j++){ |
| for(i = 0; i < 4; i++){ |
| Y[i] = Yo[i]; |
| } |
| Y += Ystride; |
| Yo += oYstride; |
| } |
| /* calculate deltas */ |
| Y -= Ystride * 4; |
| ctx->D[0] = Y[3] - last[3]; |
| ctx->D[1] = Y[3 + Ystride] - Y[3]; |
| ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride]; |
| ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2]; |
| for(i = 0; i < 4; i++) |
| last[i] = Y[i + Ystride * 3]; |
| } |
| |
| static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p) |
| { |
| int i, j; |
| int bw, bh; |
| int type; |
| int keyframe = 1; |
| uint8_t *Y, *U, *V; |
| int *src; |
| |
| bw = ctx->avctx->width >> 2; |
| bh = ctx->avctx->height >> 2; |
| |
| for(i = 0; i < TM2_NUM_STREAMS; i++) |
| ctx->tok_ptrs[i] = 0; |
| |
| if (ctx->tok_lens[TM2_TYPE]<bw*bh){ |
| av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh); |
| return -1; |
| } |
| |
| memset(ctx->last, 0, 4 * bw * sizeof(int)); |
| memset(ctx->clast, 0, 4 * bw * sizeof(int)); |
| |
| for(j = 0; j < bh; j++) { |
| memset(ctx->D, 0, 4 * sizeof(int)); |
| memset(ctx->CD, 0, 4 * sizeof(int)); |
| for(i = 0; i < bw; i++) { |
| type = GET_TOK(ctx, TM2_TYPE); |
| switch(type) { |
| case TM2_HI_RES: |
| tm2_hi_res_block(ctx, p, i, j); |
| break; |
| case TM2_MED_RES: |
| tm2_med_res_block(ctx, p, i, j); |
| break; |
| case TM2_LOW_RES: |
| tm2_low_res_block(ctx, p, i, j); |
| break; |
| case TM2_NULL_RES: |
| tm2_null_res_block(ctx, p, i, j); |
| break; |
| case TM2_UPDATE: |
| tm2_update_block(ctx, p, i, j); |
| keyframe = 0; |
| break; |
| case TM2_STILL: |
| tm2_still_block(ctx, p, i, j); |
| keyframe = 0; |
| break; |
| case TM2_MOTION: |
| tm2_motion_block(ctx, p, i, j); |
| keyframe = 0; |
| break; |
| default: |
| av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type); |
| } |
| } |
| } |
| |
| /* copy data from our buffer to AVFrame */ |
| Y = p->data[0]; |
| src = (ctx->cur?ctx->Y2:ctx->Y1); |
| for(j = 0; j < ctx->avctx->height; j++){ |
| for(i = 0; i < ctx->avctx->width; i++){ |
| Y[i] = av_clip_uint8(*src++); |
| } |
| Y += p->linesize[0]; |
| } |
| U = p->data[2]; |
| src = (ctx->cur?ctx->U2:ctx->U1); |
| for(j = 0; j < (ctx->avctx->height + 1) >> 1; j++){ |
| for(i = 0; i < (ctx->avctx->width + 1) >> 1; i++){ |
| U[i] = av_clip_uint8(*src++); |
| } |
| U += p->linesize[2]; |
| } |
| V = p->data[1]; |
| src = (ctx->cur?ctx->V2:ctx->V1); |
| for(j = 0; j < (ctx->avctx->height + 1) >> 1; j++){ |
| for(i = 0; i < (ctx->avctx->width + 1) >> 1; i++){ |
| V[i] = av_clip_uint8(*src++); |
| } |
| V += p->linesize[1]; |
| } |
| |
| return keyframe; |
| } |
| |
| static const int tm2_stream_order[TM2_NUM_STREAMS] = { |
| TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE |
| }; |
| |
| static int decode_frame(AVCodecContext *avctx, |
| void *data, int *data_size, |
| const uint8_t *buf, int buf_size) |
| { |
| TM2Context * const l = avctx->priv_data; |
| AVFrame * const p= (AVFrame*)&l->pic; |
| int i, skip, t; |
| uint8_t *swbuf; |
| |
| swbuf = av_malloc(buf_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| if(!swbuf){ |
| av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n"); |
| return -1; |
| } |
| p->reference = 1; |
| p->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE; |
| if(avctx->reget_buffer(avctx, p) < 0){ |
| av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); |
| av_free(swbuf); |
| return -1; |
| } |
| |
| l->dsp.bswap_buf((uint32_t*)swbuf, (const uint32_t*)buf, buf_size >> 2); |
| skip = tm2_read_header(l, swbuf); |
| |
| if(skip == -1){ |
| av_free(swbuf); |
| return -1; |
| } |
| |
| for(i = 0; i < TM2_NUM_STREAMS; i++){ |
| t = tm2_read_stream(l, swbuf + skip, tm2_stream_order[i]); |
| if(t == -1){ |
| av_free(swbuf); |
| return -1; |
| } |
| skip += t; |
| } |
| p->key_frame = tm2_decode_blocks(l, p); |
| if(p->key_frame) |
| p->pict_type = FF_I_TYPE; |
| else |
| p->pict_type = FF_P_TYPE; |
| |
| l->cur = !l->cur; |
| *data_size = sizeof(AVFrame); |
| *(AVFrame*)data = l->pic; |
| av_free(swbuf); |
| |
| return buf_size; |
| } |
| |
| static av_cold int decode_init(AVCodecContext *avctx){ |
| TM2Context * const l = avctx->priv_data; |
| int i; |
| |
| if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) { |
| return -1; |
| } |
| if((avctx->width & 3) || (avctx->height & 3)){ |
| av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n"); |
| return -1; |
| } |
| |
| l->avctx = avctx; |
| l->pic.data[0]=NULL; |
| avctx->pix_fmt = PIX_FMT_YUV420P; |
| |
| dsputil_init(&l->dsp, avctx); |
| |
| l->last = av_malloc(4 * sizeof(int) * (avctx->width >> 2)); |
| l->clast = av_malloc(4 * sizeof(int) * (avctx->width >> 2)); |
| |
| for(i = 0; i < TM2_NUM_STREAMS; i++) { |
| l->tokens[i] = NULL; |
| l->tok_lens[i] = 0; |
| } |
| |
| l->Y1 = av_malloc(sizeof(int) * avctx->width * avctx->height); |
| l->U1 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1)); |
| l->V1 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1)); |
| l->Y2 = av_malloc(sizeof(int) * avctx->width * avctx->height); |
| l->U2 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1)); |
| l->V2 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1)); |
| l->cur = 0; |
| |
| return 0; |
| } |
| |
| static av_cold int decode_end(AVCodecContext *avctx){ |
| TM2Context * const l = avctx->priv_data; |
| int i; |
| |
| if(l->last) |
| av_free(l->last); |
| if(l->clast) |
| av_free(l->clast); |
| for(i = 0; i < TM2_NUM_STREAMS; i++) |
| if(l->tokens[i]) |
| av_free(l->tokens[i]); |
| if(l->Y1){ |
| av_free(l->Y1); |
| av_free(l->U1); |
| av_free(l->V1); |
| av_free(l->Y2); |
| av_free(l->U2); |
| av_free(l->V2); |
| } |
| return 0; |
| } |
| |
| AVCodec truemotion2_decoder = { |
| "truemotion2", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_TRUEMOTION2, |
| sizeof(TM2Context), |
| decode_init, |
| NULL, |
| decode_end, |
| decode_frame, |
| CODEC_CAP_DR1, |
| .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"), |
| }; |
