diff options
author | Mike Melanson <mike@multimedia.cx> | 2005-10-13 08:31:55 +0400 |
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committer | Mike Melanson <mike@multimedia.cx> | 2005-10-13 08:31:55 +0400 |
commit | 64af6168f7b693037ac5b8e7043c38d69d6dab11 (patch) | |
tree | 81dd06bc2721a08a6231ae2a91ec278f2c3f861f /libavcodec/truemotion2.c | |
parent | f37f8d4c559e3238b5c1a47a3b97d9793f3f077f (diff) |
Duck TrueMotion 2 video decoder, courtesy of Konstantin Shishkov
Originally committed as revision 4638 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/truemotion2.c')
-rw-r--r-- | libavcodec/truemotion2.c | 889 |
1 files changed, 889 insertions, 0 deletions
diff --git a/libavcodec/truemotion2.c b/libavcodec/truemotion2.c new file mode 100644 index 0000000000..5392eb22b1 --- /dev/null +++ b/libavcodec/truemotion2.c @@ -0,0 +1,889 @@ +/* + * Duck/ON2 TrueMotion 2 Decoder + * Copyright (c) 2005 Konstantin Shishkov + * + * This library 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 of the License, or (at your option) any later version. + * + * This library 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 this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +/** + * @file truemotion2.c + * Duck TrueMotion2 decoder. + */ + +#include "avcodec.h" +#include "common.h" +#include "bitstream.h" +#include "dsputil.h" + +#define TM2_ESCAPE 0x80000000 +#define TM2_DELTAS 32 +/* 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, uint8_t *buf) +{ + uint32_t magic; + uint8_t *obuf; + int length; + + obuf = buf; + + magic = LE_32(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 = LE_32(buf); + buf += 4; + + init_get_bits(&ctx->gb, buf, 32); + 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, 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 = BE_32(buf); buf += 4; cur += 4; + skip = len * 4 + 4; + + if(len == 0) + return 4; + + toks = BE_32(buf); buf += 4; cur += 4; + if(toks & 1) { + len = BE_32(buf); buf += 4; cur += 4; + if(len == TM2_ESCAPE) { + len = BE_32(buf); buf += 4; cur += 4; + } + if(len > 0) { + init_get_bits(&ctx->gb, buf, skip - cur); + 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(BE_32(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); + 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 = BE_32(buf); buf += 4; cur += 4; + if(len > 0) { + init_get_bits(&ctx->gb, buf, skip - cur); + for(i = 0; i < toks; i++) + ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes); + } else { + memset(ctx->tokens[stream_id], 0, toks * sizeof(int)); + } + 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] = 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) >> 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] = 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] = 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] = clip_uint8(*src++); + } + V += p->linesize[1]; + } + + return keyframe; +} + +static int decode_frame(AVCodecContext *avctx, + void *data, int *data_size, + uint8_t *buf, int buf_size) +{ + TM2Context * const l = avctx->priv_data; + AVFrame * const p= (AVFrame*)&l->pic; + int skip, t; + + p->reference = 1; + if(avctx->get_buffer(avctx, p) < 0){ + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return -1; + } + + l->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, buf_size >> 2); + skip = tm2_read_header(l, buf); + + if(skip == -1) + return -1; + + t = tm2_read_stream(l, buf + skip, TM2_C_HI); + if(t == -1) + return -1; + skip += t; + t = tm2_read_stream(l, buf + skip, TM2_C_LO); + if(t == -1) + return -1; + skip += t; + t = tm2_read_stream(l, buf + skip, TM2_L_HI); + if(t == -1) + return -1; + skip += t; + t = tm2_read_stream(l, buf + skip, TM2_L_LO); + if(t == -1) + return -1; + skip += t; + t = tm2_read_stream(l, buf + skip, TM2_UPD); + if(t == -1) + return -1; + skip += t; + t = tm2_read_stream(l, buf + skip, TM2_MOT); + if(t == -1) + return -1; + skip += t; + t = tm2_read_stream(l, buf + skip, TM2_TYPE); + if(t == -1) + return -1; + 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; + + return buf_size; +} + +static int decode_init(AVCodecContext *avctx){ + TM2Context * const l = avctx->priv_data; + int i; + + if (avcodec_check_dimensions(avctx, avctx->height, avctx->width) < 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->has_b_frames = 0; + 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 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, +}; |