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ffmpeg/libavcodec/truemotion2.c
Stefano Sabatini 72415b2adb Define AVMediaType enum, and use it instead of enum CodecType, which 
is deprecated and will be dropped at the next major bump.

Originally committed as revision 22735 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-03-30 23:30:55 +00:00

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/*
* 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 "get_bits.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] - 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);
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;
int *Y, *U, *V;
uint8_t *dst;
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 = (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 < ctx->avctx->height; j++){
for(i = 0; i < ctx->avctx->width; 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);
}
Y += ctx->avctx->width;
if (j & 1) {
U += ctx->avctx->width >> 1;
V += ctx->avctx->width >> 1;
}
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
};
static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->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((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_BGR24;
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;
AVFrame *pic = &l->pic;
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);
}
if (pic->data[0])
avctx->release_buffer(avctx, pic);
return 0;
}
AVCodec truemotion2_decoder = {
"truemotion2",
AVMEDIA_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"),
};
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