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/*
* SVQ1 decoder
* ported to MPlayer by Arpi <arpi@thot.banki.hu>
* ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>
*
* Copyright (C) 2002 the xine project
* Copyright (C) 2002 the ffmpeg project
*
* SVQ1 Encoder (c) 2004 Mike Melanson <melanson@pcisys.net>
*
* 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
* Sorenson Vector Quantizer #1 (SVQ1) video codec.
* For more information of the SVQ1 algorithm, visit:
* http://www.pcisys.net/~melanson/codecs/
*/
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
#include "mathops.h"
#include "svq1.h"
#undef NDEBUG
#include <assert.h>
extern const uint8_t ff_mvtab[33][2];
static VLC svq1_block_type;
static VLC svq1_motion_component;
static VLC svq1_intra_multistage[6];
static VLC svq1_inter_multistage[6];
static VLC svq1_intra_mean;
static VLC svq1_inter_mean;
/* motion vector (prediction) */
typedef struct svq1_pmv_s {
int x;
int y;
} svq1_pmv;
static const uint8_t string_table[256] = {
0x00, 0xD5, 0x7F, 0xAA, 0xFE, 0x2B, 0x81, 0x54,
0x29, 0xFC, 0x56, 0x83, 0xD7, 0x02, 0xA8, 0x7D,
0x52, 0x87, 0x2D, 0xF8, 0xAC, 0x79, 0xD3, 0x06,
0x7B, 0xAE, 0x04, 0xD1, 0x85, 0x50, 0xFA, 0x2F,
0xA4, 0x71, 0xDB, 0x0E, 0x5A, 0x8F, 0x25, 0xF0,
0x8D, 0x58, 0xF2, 0x27, 0x73, 0xA6, 0x0C, 0xD9,
0xF6, 0x23, 0x89, 0x5C, 0x08, 0xDD, 0x77, 0xA2,
0xDF, 0x0A, 0xA0, 0x75, 0x21, 0xF4, 0x5E, 0x8B,
0x9D, 0x48, 0xE2, 0x37, 0x63, 0xB6, 0x1C, 0xC9,
0xB4, 0x61, 0xCB, 0x1E, 0x4A, 0x9F, 0x35, 0xE0,
0xCF, 0x1A, 0xB0, 0x65, 0x31, 0xE4, 0x4E, 0x9B,
0xE6, 0x33, 0x99, 0x4C, 0x18, 0xCD, 0x67, 0xB2,
0x39, 0xEC, 0x46, 0x93, 0xC7, 0x12, 0xB8, 0x6D,
0x10, 0xC5, 0x6F, 0xBA, 0xEE, 0x3B, 0x91, 0x44,
0x6B, 0xBE, 0x14, 0xC1, 0x95, 0x40, 0xEA, 0x3F,
0x42, 0x97, 0x3D, 0xE8, 0xBC, 0x69, 0xC3, 0x16,
0xEF, 0x3A, 0x90, 0x45, 0x11, 0xC4, 0x6E, 0xBB,
0xC6, 0x13, 0xB9, 0x6C, 0x38, 0xED, 0x47, 0x92,
0xBD, 0x68, 0xC2, 0x17, 0x43, 0x96, 0x3C, 0xE9,
0x94, 0x41, 0xEB, 0x3E, 0x6A, 0xBF, 0x15, 0xC0,
0x4B, 0x9E, 0x34, 0xE1, 0xB5, 0x60, 0xCA, 0x1F,
0x62, 0xB7, 0x1D, 0xC8, 0x9C, 0x49, 0xE3, 0x36,
0x19, 0xCC, 0x66, 0xB3, 0xE7, 0x32, 0x98, 0x4D,
0x30, 0xE5, 0x4F, 0x9A, 0xCE, 0x1B, 0xB1, 0x64,
0x72, 0xA7, 0x0D, 0xD8, 0x8C, 0x59, 0xF3, 0x26,
0x5B, 0x8E, 0x24, 0xF1, 0xA5, 0x70, 0xDA, 0x0F,
0x20, 0xF5, 0x5F, 0x8A, 0xDE, 0x0B, 0xA1, 0x74,
0x09, 0xDC, 0x76, 0xA3, 0xF7, 0x22, 0x88, 0x5D,
0xD6, 0x03, 0xA9, 0x7C, 0x28, 0xFD, 0x57, 0x82,
0xFF, 0x2A, 0x80, 0x55, 0x01, 0xD4, 0x7E, 0xAB,
0x84, 0x51, 0xFB, 0x2E, 0x7A, 0xAF, 0x05, 0xD0,
0xAD, 0x78, 0xD2, 0x07, 0x53, 0x86, 0x2C, 0xF9
};
#define SVQ1_PROCESS_VECTOR()\
for (; level > 0; i++) {\
/* process next depth */\
if (i == m) {\
m = n;\
if (--level == 0)\
break;\
}\
/* divide block if next bit set */\
if (get_bits1 (bitbuf) == 0)\
break;\
/* add child nodes */\
list[n++] = list[i];\
list[n++] = list[i] + (((level & 1) ? pitch : 1) << ((level >> 1) + 1));\
}
#define SVQ1_ADD_CODEBOOK()\
/* add codebook entries to vector */\
for (j=0; j < stages; j++) {\
n3 = codebook[entries[j]] ^ 0x80808080;\
n1 += ((n3 & 0xFF00FF00) >> 8);\
n2 += (n3 & 0x00FF00FF);\
}\
\
/* clip to [0..255] */\
if (n1 & 0xFF00FF00) {\
n3 = ((( n1 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\
n1 += 0x7F007F00;\
n1 |= (((~n1 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\
n1 &= (n3 & 0x00FF00FF);\
}\
\
if (n2 & 0xFF00FF00) {\
n3 = ((( n2 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\
n2 += 0x7F007F00;\
n2 |= (((~n2 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\
n2 &= (n3 & 0x00FF00FF);\
}
#define SVQ1_DO_CODEBOOK_INTRA()\
for (y=0; y < height; y++) {\
for (x=0; x < (width / 4); x++, codebook++) {\
n1 = n4;\
n2 = n4;\
SVQ1_ADD_CODEBOOK()\
/* store result */\
dst[x] = (n1 << 8) | n2;\
}\
dst += (pitch / 4);\
}
#define SVQ1_DO_CODEBOOK_NONINTRA()\
for (y=0; y < height; y++) {\
for (x=0; x < (width / 4); x++, codebook++) {\
n3 = dst[x];\
/* add mean value to vector */\
n1 = ((n3 & 0xFF00FF00) >> 8) + n4;\
n2 = (n3 & 0x00FF00FF) + n4;\
SVQ1_ADD_CODEBOOK()\
/* store result */\
dst[x] = (n1 << 8) | n2;\
}\
dst += (pitch / 4);\
}
#define SVQ1_CALC_CODEBOOK_ENTRIES(cbook)\
codebook = (const uint32_t *) cbook[level];\
if (stages > 0)\
bit_cache = get_bits (bitbuf, 4*stages);\
/* calculate codebook entries for this vector */\
for (j=0; j < stages; j++) {\
entries[j] = (((bit_cache >> (4*(stages - j - 1))) & 0xF) + 16*j) << (level + 1);\
}\
mean -= (stages * 128);\
n4 = (mean << 16) + mean;
static int svq1_decode_block_intra (GetBitContext *bitbuf, uint8_t *pixels, int pitch ) {
uint32_t bit_cache;
uint8_t *list[63];
uint32_t *dst;
const uint32_t *codebook;
int entries[6];
int i, j, m, n;
int mean, stages;
unsigned x, y, width, height, level;
uint32_t n1, n2, n3, n4;
/* initialize list for breadth first processing of vectors */
list[0] = pixels;
/* recursively process vector */
for (i=0, m=1, n=1, level=5; i < n; i++) {
SVQ1_PROCESS_VECTOR();
/* destination address and vector size */
dst = (uint32_t *) list[i];
width = 1 << ((4 + level) /2);
height = 1 << ((3 + level) /2);
/* get number of stages (-1 skips vector, 0 for mean only) */
stages = get_vlc2(bitbuf, svq1_intra_multistage[level].table, 3, 3) - 1;
if (stages == -1) {
for (y=0; y < height; y++) {
memset (&dst[y*(pitch / 4)], 0, width);
}
continue; /* skip vector */
}
if ((stages > 0) && (level >= 4)) {
av_dlog(NULL,
"Error (svq1_decode_block_intra): invalid vector: stages=%i level=%i\n",
stages, level);
return -1; /* invalid vector */
}
mean = get_vlc2(bitbuf, svq1_intra_mean.table, 8, 3);
if (stages == 0) {
for (y=0; y < height; y++) {
memset (&dst[y*(pitch / 4)], mean, width);
}
} else {
SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_intra_codebooks);
SVQ1_DO_CODEBOOK_INTRA()
}
}
return 0;
}
static int svq1_decode_block_non_intra (GetBitContext *bitbuf, uint8_t *pixels, int pitch ) {
uint32_t bit_cache;
uint8_t *list[63];
uint32_t *dst;
const uint32_t *codebook;
int entries[6];
int i, j, m, n;
int mean, stages;
int x, y, width, height, level;
uint32_t n1, n2, n3, n4;
/* initialize list for breadth first processing of vectors */
list[0] = pixels;
/* recursively process vector */
for (i=0, m=1, n=1, level=5; i < n; i++) {
SVQ1_PROCESS_VECTOR();
/* destination address and vector size */
dst = (uint32_t *) list[i];
width = 1 << ((4 + level) /2);
height = 1 << ((3 + level) /2);
/* get number of stages (-1 skips vector, 0 for mean only) */
stages = get_vlc2(bitbuf, svq1_inter_multistage[level].table, 3, 2) - 1;
if (stages == -1) continue; /* skip vector */
if ((stages > 0) && (level >= 4)) {
av_dlog(NULL,
"Error (svq1_decode_block_non_intra): invalid vector: stages=%i level=%i\n",
stages, level);
return -1; /* invalid vector */
}
mean = get_vlc2(bitbuf, svq1_inter_mean.table, 9, 3) - 256;
SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_inter_codebooks);
SVQ1_DO_CODEBOOK_NONINTRA()
}
return 0;
}
static int svq1_decode_motion_vector (GetBitContext *bitbuf, svq1_pmv *mv, svq1_pmv **pmv) {
int diff;
int i;
for (i=0; i < 2; i++) {
/* get motion code */
diff = get_vlc2(bitbuf, svq1_motion_component.table, 7, 2);
if(diff<0)
return -1;
else if(diff){
if(get_bits1(bitbuf)) diff= -diff;
}
/* add median of motion vector predictors and clip result */
if (i == 1)
mv->y = sign_extend(diff + mid_pred(pmv[0]->y, pmv[1]->y, pmv[2]->y), 6);
else
mv->x = sign_extend(diff + mid_pred(pmv[0]->x, pmv[1]->x, pmv[2]->x), 6);
}
return 0;
}
static void svq1_skip_block (uint8_t *current, uint8_t *previous, int pitch, int x, int y) {
uint8_t *src;
uint8_t *dst;
int i;
src = &previous[x + y*pitch];
dst = current;
for (i=0; i < 16; i++) {
memcpy (dst, src, 16);
src += pitch;
dst += pitch;
}
}
static int svq1_motion_inter_block (MpegEncContext *s, GetBitContext *bitbuf,
uint8_t *current, uint8_t *previous, int pitch,
svq1_pmv *motion, int x, int y) {
uint8_t *src;
uint8_t *dst;
svq1_pmv mv;
svq1_pmv *pmv[3];
int result;
/* predict and decode motion vector */
pmv[0] = &motion[0];
if (y == 0) {
pmv[1] =
pmv[2] = pmv[0];
}
else {
pmv[1] = &motion[(x / 8) + 2];
pmv[2] = &motion[(x / 8) + 4];
}
result = svq1_decode_motion_vector (bitbuf, &mv, pmv);
if (result != 0)
return result;
motion[0].x =
motion[(x / 8) + 2].x =
motion[(x / 8) + 3].x = mv.x;
motion[0].y =
motion[(x / 8) + 2].y =
motion[(x / 8) + 3].y = mv.y;
if(y + (mv.y >> 1)<0)
mv.y= 0;
if(x + (mv.x >> 1)<0)
mv.x= 0;
src = &previous[(x + (mv.x >> 1)) + (y + (mv.y >> 1))*pitch];
dst = current;
s->dsp.put_pixels_tab[0][((mv.y & 1) << 1) | (mv.x & 1)](dst,src,pitch,16);
return 0;
}
static int svq1_motion_inter_4v_block (MpegEncContext *s, GetBitContext *bitbuf,
uint8_t *current, uint8_t *previous, int pitch,
svq1_pmv *motion,int x, int y) {
uint8_t *src;
uint8_t *dst;
svq1_pmv mv;
svq1_pmv *pmv[4];
int i, result;
/* predict and decode motion vector (0) */
pmv[0] = &motion[0];
if (y == 0) {
pmv[1] =
pmv[2] = pmv[0];
}
else {
pmv[1] = &motion[(x / 8) + 2];
pmv[2] = &motion[(x / 8) + 4];
}
result = svq1_decode_motion_vector (bitbuf, &mv, pmv);
if (result != 0)
return result;
/* predict and decode motion vector (1) */
pmv[0] = &mv;
if (y == 0) {
pmv[1] =
pmv[2] = pmv[0];
}
else {
pmv[1] = &motion[(x / 8) + 3];
}
result = svq1_decode_motion_vector (bitbuf, &motion[0], pmv);
if (result != 0)
return result;
/* predict and decode motion vector (2) */
pmv[1] = &motion[0];
pmv[2] = &motion[(x / 8) + 1];
result = svq1_decode_motion_vector (bitbuf, &motion[(x / 8) + 2], pmv);
if (result != 0)
return result;
/* predict and decode motion vector (3) */
pmv[2] = &motion[(x / 8) + 2];
pmv[3] = &motion[(x / 8) + 3];
result = svq1_decode_motion_vector (bitbuf, pmv[3], pmv);
if (result != 0)
return result;
/* form predictions */
for (i=0; i < 4; i++) {
int mvx= pmv[i]->x + (i&1)*16;
int mvy= pmv[i]->y + (i>>1)*16;
///XXX /FIXME clipping or padding?
if(y + (mvy >> 1)<0)
mvy= 0;
if(x + (mvx >> 1)<0)
mvx= 0;
src = &previous[(x + (mvx >> 1)) + (y + (mvy >> 1))*pitch];
dst = current;
s->dsp.put_pixels_tab[1][((mvy & 1) << 1) | (mvx & 1)](dst,src,pitch,8);
/* select next block */
if (i & 1) {
current += 8*(pitch - 1);
} else {
current += 8;
}
}
return 0;
}
static int svq1_decode_delta_block (MpegEncContext *s, GetBitContext *bitbuf,
uint8_t *current, uint8_t *previous, int pitch,
svq1_pmv *motion, int x, int y) {
uint32_t block_type;
int result = 0;
/* get block type */
block_type = get_vlc2(bitbuf, svq1_block_type.table, 2, 2);
/* reset motion vectors */
if (block_type == SVQ1_BLOCK_SKIP || block_type == SVQ1_BLOCK_INTRA) {
motion[0].x =
motion[0].y =
motion[(x / 8) + 2].x =
motion[(x / 8) + 2].y =
motion[(x / 8) + 3].x =
motion[(x / 8) + 3].y = 0;
}
switch (block_type) {
case SVQ1_BLOCK_SKIP:
svq1_skip_block (current, previous, pitch, x, y);
break;
case SVQ1_BLOCK_INTER:
result = svq1_motion_inter_block (s, bitbuf, current, previous, pitch, motion, x, y);
if (result != 0)
{
av_dlog(s->avctx, "Error in svq1_motion_inter_block %i\n", result);
break;
}
result = svq1_decode_block_non_intra (bitbuf, current, pitch);
break;
case SVQ1_BLOCK_INTER_4V:
result = svq1_motion_inter_4v_block (s, bitbuf, current, previous, pitch, motion, x, y);
if (result != 0)
{
av_dlog(s->avctx, "Error in svq1_motion_inter_4v_block %i\n", result);
break;
}
result = svq1_decode_block_non_intra (bitbuf, current, pitch);
break;
case SVQ1_BLOCK_INTRA:
result = svq1_decode_block_intra (bitbuf, current, pitch);
break;
}
return result;
}
static void svq1_parse_string (GetBitContext *bitbuf, uint8_t *out) {
uint8_t seed;
int i;
out[0] = get_bits (bitbuf, 8);
seed = string_table[out[0]];
for (i=1; i <= out[0]; i++) {
out[i] = get_bits (bitbuf, 8) ^ seed;
seed = string_table[out[i] ^ seed];
}
}
static int svq1_decode_frame_header (GetBitContext *bitbuf,MpegEncContext *s) {
int frame_size_code;
skip_bits(bitbuf, 8); /* temporal_reference */
/* frame type */
s->pict_type= get_bits (bitbuf, 2)+1;
if(s->pict_type==4)
return -1;
if (s->pict_type == AV_PICTURE_TYPE_I) {
/* unknown fields */
if (s->f_code == 0x50 || s->f_code == 0x60) {
int csum = get_bits (bitbuf, 16);
csum = ff_svq1_packet_checksum (bitbuf->buffer, bitbuf->size_in_bits>>3, csum);
av_dlog(s->avctx, "%s checksum (%02x) for packet data\n",
(csum == 0) ? "correct" : "incorrect", csum);
}
if ((s->f_code ^ 0x10) >= 0x50) {
uint8_t msg[256];
svq1_parse_string (bitbuf, msg);
av_log(s->avctx, AV_LOG_INFO, "embedded message: \"%s\"\n", (char *) msg);
}
skip_bits (bitbuf, 2);
skip_bits (bitbuf, 2);
skip_bits1 (bitbuf);
/* load frame size */
frame_size_code = get_bits (bitbuf, 3);
if (frame_size_code == 7) {
/* load width, height (12 bits each) */
s->width = get_bits (bitbuf, 12);
s->height = get_bits (bitbuf, 12);
if (!s->width || !s->height)
return -1;
} else {
/* get width, height from table */
s->width = ff_svq1_frame_size_table[frame_size_code].width;
s->height = ff_svq1_frame_size_table[frame_size_code].height;
}
}
/* unknown fields */
if (get_bits1 (bitbuf) == 1) {
skip_bits1 (bitbuf); /* use packet checksum if (1) */
skip_bits1 (bitbuf); /* component checksums after image data if (1) */
if (get_bits (bitbuf, 2) != 0)
return -1;
}
if (get_bits1 (bitbuf) == 1) {
skip_bits1 (bitbuf);
skip_bits (bitbuf, 4);
skip_bits1 (bitbuf);
skip_bits (bitbuf, 2);
while (get_bits1 (bitbuf) == 1) {
skip_bits (bitbuf, 8);
}
}
return 0;
}
static int svq1_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
MpegEncContext *s=avctx->priv_data;
uint8_t *current, *previous;
int result, i, x, y, width, height;
AVFrame *pict = data;
svq1_pmv *pmv;
/* initialize bit buffer */
init_get_bits(&s->gb,buf,buf_size*8);
/* decode frame header */
s->f_code = get_bits (&s->gb, 22);
if ((s->f_code & ~0x70) || !(s->f_code & 0x60))
return -1;
/* swap some header bytes (why?) */
if (s->f_code != 0x20) {
uint32_t *src = (uint32_t *) (buf + 4);
if (buf_size < 36)
return AVERROR_INVALIDDATA;
for (i=0; i < 4; i++) {
src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i];
}
}
result = svq1_decode_frame_header (&s->gb, s);
if (result != 0)
{
av_dlog(s->avctx, "Error in svq1_decode_frame_header %i\n",result);
return result;
}
avcodec_set_dimensions(avctx, s->width, s->height);
//FIXME this avoids some confusion for "B frames" without 2 references
//this should be removed after libavcodec can handle more flexible picture types & ordering
if(s->pict_type==AV_PICTURE_TYPE_B && s->last_picture_ptr==NULL) return buf_size;
if( (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==AV_PICTURE_TYPE_B)
||(avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=AV_PICTURE_TYPE_I)
|| avctx->skip_frame >= AVDISCARD_ALL)
return buf_size;
if(ff_MPV_frame_start(s, avctx) < 0)
return -1;
pmv = av_malloc((FFALIGN(s->width, 16)/8 + 3) * sizeof(*pmv));
if (!pmv)
return -1;
/* decode y, u and v components */
for (i=0; i < 3; i++) {
int linesize;
if (i == 0) {
width = FFALIGN(s->width, 16);
height = FFALIGN(s->height, 16);
linesize= s->linesize;
} else {
if(s->flags&CODEC_FLAG_GRAY) break;
width = FFALIGN(s->width/4, 16);
height = FFALIGN(s->height/4, 16);
linesize= s->uvlinesize;
}
current = s->current_picture.f.data[i];
if(s->pict_type==AV_PICTURE_TYPE_B){
previous = s->next_picture.f.data[i];
}else{
previous = s->last_picture.f.data[i];
}
if (s->pict_type == AV_PICTURE_TYPE_I) {
/* keyframe */
for (y=0; y < height; y+=16) {
for (x=0; x < width; x+=16) {
result = svq1_decode_block_intra (&s->gb, &current[x], linesize);
if (result != 0)
{
av_log(s->avctx, AV_LOG_ERROR, "Error in svq1_decode_block %i (keyframe)\n",result);
goto err;
}
}
current += 16*linesize;
}
} else {
/* delta frame */
memset (pmv, 0, ((width / 8) + 3) * sizeof(svq1_pmv));
for (y=0; y < height; y+=16) {
for (x=0; x < width; x+=16) {
result = svq1_decode_delta_block (s, &s->gb, &current[x], previous,
linesize, pmv, x, y);
if (result != 0)
{
av_dlog(s->avctx, "Error in svq1_decode_delta_block %i\n",result);
goto err;
}
}
pmv[0].x =
pmv[0].y = 0;
current += 16*linesize;
}
}
}
*pict = s->current_picture.f;
ff_MPV_frame_end(s);
*data_size=sizeof(AVFrame);
result = buf_size;
err:
av_free(pmv);
return result;
}
static av_cold int svq1_decode_init(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
int i;
int offset = 0;
ff_MPV_decode_defaults(s);
s->avctx = avctx;
s->width = (avctx->width+3)&~3;
s->height = (avctx->height+3)&~3;
s->codec_id= avctx->codec->id;
avctx->pix_fmt = PIX_FMT_YUV410P;
avctx->has_b_frames= 1; // not true, but DP frames and these behave like unidirectional b frames
s->flags= avctx->flags;
if (ff_MPV_common_init(s) < 0) return -1;
INIT_VLC_STATIC(&svq1_block_type, 2, 4,
&ff_svq1_block_type_vlc[0][1], 2, 1,
&ff_svq1_block_type_vlc[0][0], 2, 1, 6);
INIT_VLC_STATIC(&svq1_motion_component, 7, 33,
&ff_mvtab[0][1], 2, 1,
&ff_mvtab[0][0], 2, 1, 176);
for (i = 0; i < 6; i++) {
static const uint8_t sizes[2][6] = {{14, 10, 14, 18, 16, 18}, {10, 10, 14, 14, 14, 16}};
static VLC_TYPE table[168][2];
svq1_intra_multistage[i].table = &table[offset];
svq1_intra_multistage[i].table_allocated = sizes[0][i];
offset += sizes[0][i];
init_vlc(&svq1_intra_multistage[i], 3, 8,
&ff_svq1_intra_multistage_vlc[i][0][1], 2, 1,
&ff_svq1_intra_multistage_vlc[i][0][0], 2, 1, INIT_VLC_USE_NEW_STATIC);
svq1_inter_multistage[i].table = &table[offset];
svq1_inter_multistage[i].table_allocated = sizes[1][i];
offset += sizes[1][i];
init_vlc(&svq1_inter_multistage[i], 3, 8,
&ff_svq1_inter_multistage_vlc[i][0][1], 2, 1,
&ff_svq1_inter_multistage_vlc[i][0][0], 2, 1, INIT_VLC_USE_NEW_STATIC);
}
INIT_VLC_STATIC(&svq1_intra_mean, 8, 256,
&ff_svq1_intra_mean_vlc[0][1], 4, 2,
&ff_svq1_intra_mean_vlc[0][0], 4, 2, 632);
INIT_VLC_STATIC(&svq1_inter_mean, 9, 512,
&ff_svq1_inter_mean_vlc[0][1], 4, 2,
&ff_svq1_inter_mean_vlc[0][0], 4, 2, 1434);
return 0;
}
static av_cold int svq1_decode_end(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
ff_MPV_common_end(s);
return 0;
}
AVCodec ff_svq1_decoder = {
.name = "svq1",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_SVQ1,
.priv_data_size = sizeof(MpegEncContext),
.init = svq1_decode_init,
.close = svq1_decode_end,
.decode = svq1_decode_frame,
.capabilities = CODEC_CAP_DR1,
.flush = ff_mpeg_flush,
.pix_fmts = (const enum PixelFormat[]){ PIX_FMT_YUV410P, PIX_FMT_NONE },
.long_name = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),
};
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