virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-02 03:06:28 +02:00
Code Issues Releases Activity
5a06d3810e
FFmpeg/libavcodec/svq1dec.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

868 lines
28 KiB
C
Raw Blame History

/*
* 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 "libavutil/crc.h"
#include "libavutil/mem.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.h"
#include "h263data.h"
#include "hpeldsp.h"
#include "mathops.h"
#include "svq1.h"
#define SVQ1_BLOCK_TYPE_VLC_BITS 3
static VLCElem svq1_block_type[8];
static VLCElem svq1_motion_component[176];
static const VLCElem *svq1_intra_multistage[6];
static const VLCElem *svq1_inter_multistage[6];
static VLCElem svq1_intra_mean[632];
static VLCElem svq1_inter_mean[1434];
/* motion vector (prediction) */
typedef struct svq1_pmv_s {
int x;
int y;
} svq1_pmv;
typedef struct SVQ1Context {
HpelDSPContext hdsp;
GetBitContext gb;
AVFrame *prev;
uint8_t *pkt_swapped;
int pkt_swapped_allocated;
svq1_pmv *pmv;
int pmv_allocated;
int width;
int height;
int frame_code;
int nonref; // 1 if the current frame won't be referenced
int last_tempref;
} SVQ1Context;
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)) \
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_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,
ptrdiff_t 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 stages;
unsigned mean;
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], 4, 2) - 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)) {
ff_dlog(NULL,
"Error (svq1_decode_block_intra): invalid vector: stages=%i level=%i\n",
stages, level);
return AVERROR_INVALIDDATA; /* invalid vector */
}
av_assert0(stages >= 0);
mean = get_vlc2(bitbuf, svq1_intra_mean, 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);
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;
}
}
}
return 0;
}
static int svq1_decode_block_non_intra(GetBitContext *bitbuf, uint8_t *pixels,
ptrdiff_t pitch, int buggy)
{
uint32_t bit_cache;
uint8_t *list[63];
uint32_t *dst;
const uint32_t *codebook;
int entries[6];
int i, j, m, n;
int stages;
unsigned mean;
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], 3, 2) - 1;
if (stages == -1)
continue; /* skip vector */
if ((stages > 0 && level >= 4)) {
ff_dlog(NULL,
"Error (svq1_decode_block_non_intra): invalid vector: stages=%i level=%i\n",
stages, level);
return AVERROR_INVALIDDATA; /* invalid vector */
}
av_assert0(stages >= 0);
mean = get_vlc2(bitbuf, svq1_inter_mean, 9, 3) - 256;
if (buggy) {
if (mean == -128)
mean = 128;
else if (mean == 128)
mean = -128;
}
SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_inter_codebooks);
for (y = 0; y < height; y++) {
for (x = 0; x < width / 4; x++) {
n3 = dst[x];
/* add mean value to vector */
n1 = n4 + ((n3 & 0xFF00FF00) >> 8);
n2 = n4 + (n3 & 0x00FF00FF);
SVQ1_ADD_CODEBOOK()
/* store result */
dst[x] = n1 << 8 | n2;
if (codebook != NULL)
codebook++;
}
dst += pitch / 4;
}
}
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, 7, 2);
if (diff < 0)
return AVERROR_INVALIDDATA;
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,
ptrdiff_t 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(HpelDSPContext *hdsp, GetBitContext *bitbuf,
uint8_t *current, uint8_t *previous,
ptrdiff_t pitch, svq1_pmv *motion, int x, int y,
int width, int height)
{
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)
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;
mv.x = av_clip(mv.x, -2 * x, 2 * (width - x - 16));
mv.y = av_clip(mv.y, -2 * y, 2 * (height - y - 16));
src = &previous[(x + (mv.x >> 1)) + (y + (mv.y >> 1)) * pitch];
dst = current;
hdsp->put_pixels_tab[0][(mv.y & 1) << 1 | (mv.x & 1)](dst, src, pitch, 16);
return 0;
}
static int svq1_motion_inter_4v_block(HpelDSPContext *hdsp, GetBitContext *bitbuf,
uint8_t *current, uint8_t *previous,
ptrdiff_t pitch, svq1_pmv *motion, int x, int y,
int width, int height)
{
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)
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)
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)
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)
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;
// FIXME: clipping or padding?
mvx = av_clip(mvx, -2 * x, 2 * (width - x - 8));
mvy = av_clip(mvy, -2 * y, 2 * (height - y - 8));
src = &previous[(x + (mvx >> 1)) + (y + (mvy >> 1)) * pitch];
dst = current;
hdsp->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(AVCodecContext *avctx, HpelDSPContext *hdsp,
GetBitContext *bitbuf,
uint8_t *current, uint8_t *previous,
ptrdiff_t pitch, svq1_pmv *motion, int x, int y,
int width, int height, int buggy)
{
uint32_t block_type;
int result = 0;
/* get block type */
block_type = get_vlc2(bitbuf, svq1_block_type,
SVQ1_BLOCK_TYPE_VLC_BITS, 1);
/* 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(hdsp, bitbuf, current, previous,
pitch, motion, x, y, width, height);
if (result != 0) {
ff_dlog(avctx, "Error in svq1_motion_inter_block %i\n", result);
break;
}
result = svq1_decode_block_non_intra(bitbuf, current, pitch, buggy);
break;
case SVQ1_BLOCK_INTER_4V:
result = svq1_motion_inter_4v_block(hdsp, bitbuf, current, previous,
pitch, motion, x, y, width, height);
if (result != 0) {
ff_dlog(avctx, "Error in svq1_motion_inter_4v_block %i\n", result);
break;
}
result = svq1_decode_block_non_intra(bitbuf, current, pitch, buggy);
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[257])
{
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];
}
out[i] = 0;
}
static int svq1_decode_frame_header(AVCodecContext *avctx, AVFrame *frame, int * buggy)
{
SVQ1Context *s = avctx->priv_data;
GetBitContext *bitbuf = &s->gb;
int frame_size_code;
int width = s->width;
int height = s->height;
int tempref;
tempref = get_bits(bitbuf, 8); /* temporal_reference */
*buggy = tempref == 0 && s->last_tempref == 0 && avctx->extradata_size == 0;
s->last_tempref = tempref;
/* frame type */
s->nonref = 0;
switch (get_bits(bitbuf, 2)) {
case 0:
frame->pict_type = AV_PICTURE_TYPE_I;
break;
case 2:
s->nonref = 1;
case 1:
frame->pict_type = AV_PICTURE_TYPE_P;
break;
default:
av_log(avctx, AV_LOG_ERROR, "Invalid frame type.\n");
return AVERROR_INVALIDDATA;
}
if (frame->pict_type == AV_PICTURE_TYPE_I) {
/* unknown fields */
if (s->frame_code == 0x50 || s->frame_code == 0x60) {
int csum = get_bits(bitbuf, 16);
csum = av_bswap16(av_crc(av_crc_get_table(AV_CRC_16_CCITT), av_bswap16(csum), bitbuf->buffer, bitbuf->size_in_bits >> 3));
ff_dlog(avctx, "%s checksum (%02x) for packet data\n",
(csum == 0) ? "correct" : "incorrect", csum);
}
if ((s->frame_code ^ 0x10) >= 0x50) {
uint8_t msg[257];
svq1_parse_string(bitbuf, msg);
av_log(avctx, AV_LOG_INFO,
"embedded message:\n%s\n", ((char *)msg) + 1);
}
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) */
width = get_bits(bitbuf, 12);
height = get_bits(bitbuf, 12);
if (!width || !height)
return AVERROR_INVALIDDATA;
} else {
/* get width, height from table */
width = ff_svq1_frame_size_table[frame_size_code][0];
height = ff_svq1_frame_size_table[frame_size_code][1];
}
}
/* unknown fields */
if (get_bits1(bitbuf)) {
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 AVERROR_INVALIDDATA;
}
if (get_bits1(bitbuf)) {
skip_bits1(bitbuf);
skip_bits(bitbuf, 4);
skip_bits1(bitbuf);
skip_bits(bitbuf, 2);
if (skip_1stop_8data_bits(bitbuf) < 0)
return AVERROR_INVALIDDATA;
}
if (get_bits_left(bitbuf) <= 0)
return AVERROR_INVALIDDATA;
s->width = width;
s->height = height;
return 0;
}
static int svq1_decode_frame(AVCodecContext *avctx, AVFrame *cur,
int *got_frame, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
SVQ1Context *s = avctx->priv_data;
uint8_t *current;
int result, i, x, y, width, height, buggy;
int ret;
/* initialize bit buffer */
ret = init_get_bits8(&s->gb, buf, buf_size);
if (ret < 0)
return ret;
/* decode frame header */
s->frame_code = get_bits(&s->gb, 22);
if ((s->frame_code & ~0x70) || !(s->frame_code & 0x60))
return AVERROR_INVALIDDATA;
/* swap some header bytes (why?) */
if (s->frame_code != 0x20) {
uint32_t *src;
if (buf_size < 9 * 4) {
av_log(avctx, AV_LOG_ERROR, "Input packet too small\n");
return AVERROR_INVALIDDATA;
}
av_fast_padded_malloc(&s->pkt_swapped,
&s->pkt_swapped_allocated,
buf_size);
if (!s->pkt_swapped)
return AVERROR(ENOMEM);
memcpy(s->pkt_swapped, buf, buf_size);
buf = s->pkt_swapped;
init_get_bits(&s->gb, buf, buf_size * 8);
skip_bits(&s->gb, 22);
src = (uint32_t *)(s->pkt_swapped + 4);
for (i = 0; i < 4; i++)
src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i];
}
result = svq1_decode_frame_header(avctx, cur, &buggy);
if (result != 0) {
ff_dlog(avctx, "Error in svq1_decode_frame_header %i\n", result);
return result;
}
result = ff_set_dimensions(avctx, s->width, s->height);
if (result < 0)
return result;
if ((avctx->skip_frame >= AVDISCARD_NONREF && s->nonref) ||
(avctx->skip_frame >= AVDISCARD_NONKEY &&
cur->pict_type != AV_PICTURE_TYPE_I) ||
avctx->skip_frame >= AVDISCARD_ALL)
return buf_size;
result = ff_get_buffer(avctx, cur, s->nonref ? 0 : AV_GET_BUFFER_FLAG_REF);
if (result < 0)
return result;
av_fast_padded_malloc(&s->pmv, &s->pmv_allocated, (FFALIGN(s->width, 16) / 8 + 3) * sizeof(*s->pmv));
if (!s->pmv)
return AVERROR(ENOMEM);
/* decode y, u and v components */
for (i = 0; i < 3; i++) {
int linesize = cur->linesize[i];
if (i == 0) {
width = FFALIGN(s->width, 16);
height = FFALIGN(s->height, 16);
} else {
if (avctx->flags & AV_CODEC_FLAG_GRAY)
break;
width = FFALIGN(s->width / 4, 16);
height = FFALIGN(s->height / 4, 16);
}
current = cur->data[i];
if (cur->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) {
av_log(avctx, AV_LOG_ERROR,
"Error in svq1_decode_block %i (keyframe)\n",
result);
return result;
}
}
current += 16 * linesize;
}
} else {
/* delta frame */
uint8_t *previous = s->prev->data[i];
if (!previous ||
s->prev->width != s->width || s->prev->height != s->height) {
av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");
return AVERROR_INVALIDDATA;
}
memset(s->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(avctx, &s->hdsp,
&s->gb, &current[x],
previous, linesize,
s->pmv, x, y, width, height, buggy);
if (result != 0) {
ff_dlog(avctx,
"Error in svq1_decode_delta_block %i\n",
result);
return result;
}
}
s->pmv[0].x =
s->pmv[0].y = 0;
current += 16 * linesize;
}
}
}
if (!s->nonref) {
result = av_frame_replace(s->prev, cur);
if (result < 0)
return result;
}
*got_frame = 1;
result = buf_size;
return result;
}
static av_cold void svq1_static_init(void)
{
static VLCElem table[196];
VLCInitState state = VLC_INIT_STATE(table);
VLC_INIT_STATIC_TABLE(svq1_block_type, SVQ1_BLOCK_TYPE_VLC_BITS, 4,
&ff_svq1_block_type_vlc[0][1], 2, 1,
&ff_svq1_block_type_vlc[0][0], 2, 1, 0);
VLC_INIT_STATIC_TABLE(svq1_motion_component, 7, 33,
&ff_mvtab[0][1], 2, 1,
&ff_mvtab[0][0], 2, 1, 0);
for (int i = 0; i < 6; i++) {
svq1_intra_multistage[i] =
ff_vlc_init_tables(&state, 4, 8,
&ff_svq1_intra_multistage_vlc[i][0][1], 2, 1,
&ff_svq1_intra_multistage_vlc[i][0][0], 2, 1, 0);
svq1_inter_multistage[i] =
ff_vlc_init_tables(&state, 3, 8,
&ff_svq1_inter_multistage_vlc[i][0][1], 2, 1,
&ff_svq1_inter_multistage_vlc[i][0][0], 2, 1, 0);
}
VLC_INIT_STATIC_TABLE(svq1_intra_mean, 8, 256,
&ff_svq1_intra_mean_vlc[0][1], 4, 2,
&ff_svq1_intra_mean_vlc[0][0], 4, 2, 0);
VLC_INIT_STATIC_TABLE(svq1_inter_mean, 9, 512,
&ff_svq1_inter_mean_vlc[0][1], 4, 2,
&ff_svq1_inter_mean_vlc[0][0], 4, 2, 0);
}
static av_cold int svq1_decode_init(AVCodecContext *avctx)
{
static AVOnce init_static_once = AV_ONCE_INIT;
SVQ1Context *s = avctx->priv_data;
s->prev = av_frame_alloc();
if (!s->prev)
return AVERROR(ENOMEM);
s->width = avctx->width + 3 & ~3;
s->height = avctx->height + 3 & ~3;
avctx->pix_fmt = AV_PIX_FMT_YUV410P;
ff_hpeldsp_init(&s->hdsp, avctx->flags);
ff_thread_once(&init_static_once, svq1_static_init);
s->last_tempref = 0xFF;
return 0;
}
static av_cold int svq1_decode_end(AVCodecContext *avctx)
{
SVQ1Context *s = avctx->priv_data;
av_frame_free(&s->prev);
av_freep(&s->pkt_swapped);
s->pkt_swapped_allocated = 0;
av_freep(&s->pmv);
s->pmv_allocated = 0;
return 0;
}
static void svq1_flush(AVCodecContext *avctx)
{
SVQ1Context *s = avctx->priv_data;
av_frame_unref(s->prev);
}
const FFCodec ff_svq1_decoder = {
.p.name = "svq1",
CODEC_LONG_NAME("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_SVQ1,
.priv_data_size = sizeof(SVQ1Context),
.init = svq1_decode_init,
.close = svq1_decode_end,
FF_CODEC_DECODE_CB(svq1_decode_frame),
.p.capabilities = AV_CODEC_CAP_DR1,
.flush = svq1_flush,
};
Reference in New Issue View Git Blame Copy Permalink