diff options
Diffstat (limited to 'ffmpeg/libavcodec/truemotion2.c')
| -rw-r--r-- | ffmpeg/libavcodec/truemotion2.c | 1021 |
1 files changed, 0 insertions, 1021 deletions
diff --git a/ffmpeg/libavcodec/truemotion2.c b/ffmpeg/libavcodec/truemotion2.c deleted file mode 100644 index a1683f5..0000000 --- a/ffmpeg/libavcodec/truemotion2.c +++ /dev/null @@ -1,1021 +0,0 @@ -/* - * 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 - * Duck TrueMotion2 decoder. - */ - -#include "avcodec.h" -#include "bytestream.h" -#include "get_bits.h" -#include "dsputil.h" -#include "internal.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; - - uint8_t *buffer; - int buffer_size; - - /* 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_base, *U1_base, *V1_base, *Y2_base, *U2_base, *V2_base; - int *Y1, *U1, *V1, *Y2, *U2, *V2; - int y_stride, uv_stride; - 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) -{ - int ret; - if (length > huff->max_bits) { - av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n", - huff->max_bits); - return AVERROR_INVALIDDATA; - } - - 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 AVERROR_INVALIDDATA; - } - 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 ((ret = tm2_read_tree(ctx, prefix << 1, length + 1, huff)) < 0) - return ret; - if ((ret = tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff)) < 0) - return ret; - } - 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 > 25)) { - 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 AVERROR_INVALIDDATA; - } - 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 AVERROR_INVALIDDATA; - } - /* 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_calloc(huff.max_num, sizeof(int)); - huff.bits = av_calloc(huff.max_num, sizeof(uint32_t)); - huff.lens = av_calloc(huff.max_num, sizeof(int)); - - if (!huff.nums || !huff.bits || !huff.lens) { - res = AVERROR(ENOMEM); - goto fail; - } - - res = tm2_read_tree(ctx, 0, 0, &huff); - - 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 = AVERROR_INVALIDDATA; - } - - /* convert codes to vlc_table */ - if (res >= 0) { - 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"); - else { - code->bits = huff.max_bits; - code->length = huff.max_num; - code->recode = av_malloc_array(code->length, sizeof(int)); - if (!code->recode) { - res = AVERROR(ENOMEM); - goto fail; - } - for (i = 0; i < code->length; i++) - code->recode[i] = huff.nums[i]; - } - } -fail: - /* free allocated memory */ - av_free(huff.nums); - av_free(huff.bits); - av_free(huff.lens); - - return res; -} - -static void tm2_free_codes(TM2Codes *code) -{ - av_free(code->recode); - if (code->vlc.table) - ff_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); - if(val<0) - return -1; - return code->recode[val]; -} - -#define TM2_OLD_HEADER_MAGIC 0x00000100 -#define TM2_NEW_HEADER_MAGIC 0x00000101 - -static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf) -{ - uint32_t magic = AV_RL32(buf); - - switch (magic) { - case TM2_OLD_HEADER_MAGIC: - avpriv_request_sample(ctx->avctx, "Old TM2 header"); - return 0; - case TM2_NEW_HEADER_MAGIC: - return 0; - default: - av_log(ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic); - return AVERROR_INVALIDDATA; - } -} - -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 AVERROR_INVALIDDATA; - } - - 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 buf_size) -{ - int i, ret; - int skip = 0; - int len, toks, pos; - TM2Codes codes; - GetByteContext gb; - - if (buf_size < 4) { - av_log(ctx->avctx, AV_LOG_ERROR, "not enough space for len left\n"); - return AVERROR_INVALIDDATA; - } - - /* get stream length in dwords */ - bytestream2_init(&gb, buf, buf_size); - len = bytestream2_get_be32(&gb); - skip = len * 4 + 4; - - if (len == 0) - return 4; - - if (len >= INT_MAX/4-1 || len < 0 || skip > buf_size) { - av_log(ctx->avctx, AV_LOG_ERROR, "invalid stream size\n"); - return AVERROR_INVALIDDATA; - } - - toks = bytestream2_get_be32(&gb); - if (toks & 1) { - len = bytestream2_get_be32(&gb); - if (len == TM2_ESCAPE) { - len = bytestream2_get_be32(&gb); - } - if (len > 0) { - pos = bytestream2_tell(&gb); - if (skip <= pos) - return AVERROR_INVALIDDATA; - init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8); - if ((ret = tm2_read_deltas(ctx, stream_id)) < 0) - return ret; - bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2); - } - } - /* skip unused fields */ - len = bytestream2_get_be32(&gb); - if (len == TM2_ESCAPE) { /* some unknown length - could be escaped too */ - bytestream2_skip(&gb, 8); /* unused by decoder */ - } else { - bytestream2_skip(&gb, 4); /* unused by decoder */ - } - - pos = bytestream2_tell(&gb); - if (skip <= pos) - return AVERROR_INVALIDDATA; - init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8); - if ((ret = tm2_build_huff_table(ctx, &codes)) < 0) - return ret; - bytestream2_skip(&gb, ((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 AVERROR_INVALIDDATA; - } - ret = av_reallocp_array(&ctx->tokens[stream_id], toks, sizeof(int)); - if (ret < 0) { - ctx->tok_lens[stream_id] = 0; - return ret; - } - ctx->tok_lens[stream_id] = toks; - len = bytestream2_get_be32(&gb); - if (len > 0) { - pos = bytestream2_tell(&gb); - if (skip <= pos) - return AVERROR_INVALIDDATA; - init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8); - for (i = 0; i < toks; i++) { - if (get_bits_left(&ctx->gb) <= 0) { - av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks); - return AVERROR_INVALIDDATA; - } - ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes); - if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS || ctx->tokens[stream_id][i]<0) { - av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n", - ctx->tokens[stream_id][i], stream_id, i); - return AVERROR_INVALIDDATA; - } - } - } else { - for (i = 0; i < toks; i++) { - ctx->tokens[stream_id][i] = codes.recode[0]; - if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) { - av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n", - ctx->tokens[stream_id][i], stream_id, i); - return AVERROR_INVALIDDATA; - } - } - } - 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) { - if (ctx->tokens[type][ctx->tok_ptrs[type]] >= TM2_DELTAS) { - av_log(ctx->avctx, AV_LOG_ERROR, "token %d is too large\n", ctx->tokens[type][ctx->tok_ptrs[type]]); - return 0; - } - 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->y_stride;\ - Vstride = ctx->uv_stride;\ - Ustride = ctx->uv_stride;\ - 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] - last[1];\ - CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\ - last[0] = (int)CHR[stride + 0];\ - last[1] = (int)CHR[stride + 1];} - -/* 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]; - } - 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); - mx = av_clip(mx, -(bx * 4 + 4), ctx->avctx->width - bx * 4); - my = av_clip(my, -(by * 4 + 4), ctx->avctx->height - by * 4); - - if (4*bx+mx<0 || 4*by+my<0 || 4*bx+mx+4 > ctx->avctx->width || 4*by+my+4 > ctx->avctx->height) { - av_log(ctx->avctx, AV_LOG_ERROR, "MV out of picture\n"); - return; - } - - 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 w = ctx->avctx->width, h = ctx->avctx->height, bw = w >> 2, bh = h >> 2, cw = w >> 1; - int type; - int keyframe = 1; - int *Y, *U, *V; - uint8_t *dst; - - 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 AVERROR_INVALIDDATA; - } - - 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 = (ctx->cur?ctx->Y2:ctx->Y1); - U = (ctx->cur?ctx->U2:ctx->U1); - V = (ctx->cur?ctx->V2:ctx->V1); - dst = p->data[0]; - for (j = 0; j < h; j++) { - for (i = 0; i < w; i++) { - int y = Y[i], u = U[i >> 1], v = V[i >> 1]; - dst[3*i+0] = av_clip_uint8(y + v); - dst[3*i+1] = av_clip_uint8(y); - dst[3*i+2] = av_clip_uint8(y + u); - } - - /* horizontal edge extension */ - Y[-4] = Y[-3] = Y[-2] = Y[-1] = Y[0]; - Y[w + 3] = Y[w + 2] = Y[w + 1] = Y[w] = Y[w - 1]; - - /* vertical edge extension */ - if (j == 0) { - memcpy(Y - 4 - 1 * ctx->y_stride, Y - 4, ctx->y_stride); - memcpy(Y - 4 - 2 * ctx->y_stride, Y - 4, ctx->y_stride); - memcpy(Y - 4 - 3 * ctx->y_stride, Y - 4, ctx->y_stride); - memcpy(Y - 4 - 4 * ctx->y_stride, Y - 4, ctx->y_stride); - } else if (j == h - 1) { - memcpy(Y - 4 + 1 * ctx->y_stride, Y - 4, ctx->y_stride); - memcpy(Y - 4 + 2 * ctx->y_stride, Y - 4, ctx->y_stride); - memcpy(Y - 4 + 3 * ctx->y_stride, Y - 4, ctx->y_stride); - memcpy(Y - 4 + 4 * ctx->y_stride, Y - 4, ctx->y_stride); - } - - Y += ctx->y_stride; - if (j & 1) { - /* horizontal edge extension */ - U[-2] = U[-1] = U[0]; - V[-2] = V[-1] = V[0]; - U[cw + 1] = U[cw] = U[cw - 1]; - V[cw + 1] = V[cw] = V[cw - 1]; - - /* vertical edge extension */ - if (j == 1) { - memcpy(U - 2 - 1 * ctx->uv_stride, U - 2, ctx->uv_stride); - memcpy(V - 2 - 1 * ctx->uv_stride, V - 2, ctx->uv_stride); - memcpy(U - 2 - 2 * ctx->uv_stride, U - 2, ctx->uv_stride); - memcpy(V - 2 - 2 * ctx->uv_stride, V - 2, ctx->uv_stride); - } else if (j == h - 1) { - memcpy(U - 2 + 1 * ctx->uv_stride, U - 2, ctx->uv_stride); - memcpy(V - 2 + 1 * ctx->uv_stride, V - 2, ctx->uv_stride); - memcpy(U - 2 + 2 * ctx->uv_stride, U - 2, ctx->uv_stride); - memcpy(V - 2 + 2 * ctx->uv_stride, V - 2, ctx->uv_stride); - } - - U += ctx->uv_stride; - V += ctx->uv_stride; - } - dst += p->linesize[0]; - } - - 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 -}; - -#define TM2_HEADER_SIZE 40 - -static int decode_frame(AVCodecContext *avctx, - void *data, int *got_frame, - AVPacket *avpkt) -{ - TM2Context * const l = avctx->priv_data; - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size & ~3; - AVFrame * const p = l->pic; - int offset = TM2_HEADER_SIZE; - int i, t, ret; - - av_fast_padded_malloc(&l->buffer, &l->buffer_size, buf_size); - if (!l->buffer) { - av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n"); - return AVERROR(ENOMEM); - } - - if ((ret = ff_reget_buffer(avctx, p)) < 0) - return ret; - - l->dsp.bswap_buf((uint32_t*)l->buffer, (const uint32_t*)buf, buf_size >> 2); - - if ((ret = tm2_read_header(l, l->buffer)) < 0) { - return ret; - } - - for (i = 0; i < TM2_NUM_STREAMS; i++) { - if (offset >= buf_size) { - av_log(avctx, AV_LOG_ERROR, "no space for tm2_read_stream\n"); - return AVERROR_INVALIDDATA; - } - - t = tm2_read_stream(l, l->buffer + offset, tm2_stream_order[i], - buf_size - offset); - if (t < 0) { - int j = tm2_stream_order[i]; - memset(l->tokens[j], 0, sizeof(**l->tokens) * l->tok_lens[j]); - return t; - } - offset += t; - } - p->key_frame = tm2_decode_blocks(l, p); - if (p->key_frame) - p->pict_type = AV_PICTURE_TYPE_I; - else - p->pict_type = AV_PICTURE_TYPE_P; - - l->cur = !l->cur; - *got_frame = 1; - ret = av_frame_ref(data, l->pic); - - return (ret < 0) ? ret : buf_size; -} - -static av_cold int decode_init(AVCodecContext *avctx) -{ - TM2Context * const l = avctx->priv_data; - int i, w = avctx->width, h = avctx->height; - - if ((avctx->width & 3) || (avctx->height & 3)) { - av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n"); - return AVERROR(EINVAL); - } - - l->avctx = avctx; - avctx->pix_fmt = AV_PIX_FMT_BGR24; - - l->pic = av_frame_alloc(); - if (!l->pic) - return AVERROR(ENOMEM); - - ff_dsputil_init(&l->dsp, avctx); - - l->last = av_malloc_array(w >> 2, 4 * sizeof(*l->last) ); - l->clast = av_malloc_array(w >> 2, 4 * sizeof(*l->clast)); - - for (i = 0; i < TM2_NUM_STREAMS; i++) { - l->tokens[i] = NULL; - l->tok_lens[i] = 0; - } - - w += 8; - h += 8; - l->Y1_base = av_calloc(w * h, sizeof(*l->Y1_base)); - l->Y2_base = av_calloc(w * h, sizeof(*l->Y2_base)); - l->y_stride = w; - w = (w + 1) >> 1; - h = (h + 1) >> 1; - l->U1_base = av_calloc(w * h, sizeof(*l->U1_base)); - l->V1_base = av_calloc(w * h, sizeof(*l->V1_base)); - l->U2_base = av_calloc(w * h, sizeof(*l->U2_base)); - l->V2_base = av_calloc(w * h, sizeof(*l->V1_base)); - l->uv_stride = w; - l->cur = 0; - if (!l->Y1_base || !l->Y2_base || !l->U1_base || - !l->V1_base || !l->U2_base || !l->V2_base || - !l->last || !l->clast) { - av_freep(&l->Y1_base); - av_freep(&l->Y2_base); - av_freep(&l->U1_base); - av_freep(&l->U2_base); - av_freep(&l->V1_base); - av_freep(&l->V2_base); - av_freep(&l->last); - av_freep(&l->clast); - av_frame_free(&l->pic); - return AVERROR(ENOMEM); - } - l->Y1 = l->Y1_base + l->y_stride * 4 + 4; - l->Y2 = l->Y2_base + l->y_stride * 4 + 4; - l->U1 = l->U1_base + l->uv_stride * 2 + 2; - l->U2 = l->U2_base + l->uv_stride * 2 + 2; - l->V1 = l->V1_base + l->uv_stride * 2 + 2; - l->V2 = l->V2_base + l->uv_stride * 2 + 2; - - return 0; -} - -static av_cold int decode_end(AVCodecContext *avctx) -{ - TM2Context * const l = avctx->priv_data; - int i; - - av_free(l->last); - av_free(l->clast); - for (i = 0; i < TM2_NUM_STREAMS; i++) - av_free(l->tokens[i]); - if (l->Y1) { - av_free(l->Y1_base); - av_free(l->U1_base); - av_free(l->V1_base); - av_free(l->Y2_base); - av_free(l->U2_base); - av_free(l->V2_base); - } - av_freep(&l->buffer); - l->buffer_size = 0; - - av_frame_free(&l->pic); - - return 0; -} - -AVCodec ff_truemotion2_decoder = { - .name = "truemotion2", - .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"), - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_TRUEMOTION2, - .priv_data_size = sizeof(TM2Context), - .init = decode_init, - .close = decode_end, - .decode = decode_frame, - .capabilities = CODEC_CAP_DR1, -}; 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