* Duck/ON2 TrueMotion 2 Decoder
* Copyright (c) 2005 Konstantin Shishkov
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
-
+
/**
* @file truemotion2.c
* Duck TrueMotion2 decoder.
*/
-
+
#include "avcodec.h"
#include "common.h"
#include "bitstream.h"
GetBitContext gb;
DSPContext dsp;
-
+
/* TM2 streams */
int *tokens[TM2_NUM_STREAMS];
int tok_lens[TM2_NUM_STREAMS];
int CD[4];
int *last;
int *clast;
-
+
/* data for current and previous frame */
int *Y1, *U1, *V1, *Y2, *U2, *V2;
int cur;
{
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)) {
/* 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
+ } else
res = 0;
if(res != -1) {
code->bits = huff.max_bits;
av_free(huff.nums);
av_free(huff.bits);
av_free(huff.lens);
-
+
return res;
}
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 * 8);
size = get_bits_long(&ctx->gb, 31);
h = 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)))
}
for(; i < TM2_DELTAS; i++)
ctx->deltas[stream_id][i] = 0;
-
+
return 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;
}
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)){
ctx->tokens[stream_id][i] = codes.recode[0];
}
tm2_free_codes(&codes);
-
+
return skip;
}
{
int ct, d;
int i, j;
-
+
for(j = 0; j < 4; j++){
ct = ctx->D[j];
for(i = 0; i < 4; i++){
else
prev = 0;
t = (CD[0] + CD[1]) >> 1;
- l = (prev - CD[0] - CD[1] + clast[1] + 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);
}
}
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);
}
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;
/* 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);
}
/* 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
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);
}
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[3] = right;
{
int tp = left;
-
+
ctx->D[0] = (tp + (ct >> 2)) - left;
left += ctx->D[0];
ctx->D[1] = (tp + (ct >> 1)) - left;
int i, j;
int d;
TM2_INIT_POINTERS_2();
-
+
/* update chroma */
for(j = 0; j < 2; j++){
for(i = 0; i < 2; i++){
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++){
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));
}
}
}
-
- /* copy data from our buffer to AVFrame */
+
+ /* 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++){
}
V += p->linesize[1];
}
-
+
return keyframe;
}
-static int decode_frame(AVCodecContext *avctx,
+static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
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;
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;
}
TM2Context * const l = avctx->priv_data;
int i;
- if (avcodec_check_dimensions(avctx, avctx->height, avctx->width) < 0) {
+ 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->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->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;
}
projects / ffmpeg / blobdiff