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FFmpeg/libavcodec/svq3.c
Andreas Rheinhardt bcf707639e avcodec/svq3: Don't copy watermarked frame data twice 
The SVQ3 decoder modifies the input bitstream at two places.
One of them is only reached when the file is watermarked.
Therefore commit 2264c11081
made a copy of all the frame data in this case.

But there is a second possibility for modifying the frame and
therefore Libav commit 1098f5c049
made the decoder always copy the data. This of course makes
the additional copy for watermarked frames redundant, but it hasn't
been removed. This commit does so.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
2021-03-23 13:51:18 +01:00

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/*
* Copyright (c) 2003 The FFmpeg Project
*
* 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
*/
/*
* How to use this decoder:
* SVQ3 data is transported within Apple Quicktime files. Quicktime files
* have stsd atoms to describe media trak properties. A stsd atom for a
* video trak contains 1 or more ImageDescription atoms. These atoms begin
* with the 4-byte length of the atom followed by the codec fourcc. Some
* decoders need information in this atom to operate correctly. Such
* is the case with SVQ3. In order to get the best use out of this decoder,
* the calling app must make the SVQ3 ImageDescription atom available
* via the AVCodecContext's extradata[_size] field:
*
* AVCodecContext.extradata = pointer to ImageDescription, first characters
* are expected to be 'S', 'V', 'Q', and '3', NOT the 4-byte atom length
* AVCodecContext.extradata_size = size of ImageDescription atom memory
* buffer (which will be the same as the ImageDescription atom size field
* from the QT file, minus 4 bytes since the length is missing)
*
* You will know you have these parameters passed correctly when the decoder
* correctly decodes this file:
* http://samples.mplayerhq.hu/V-codecs/SVQ3/Vertical400kbit.sorenson3.mov
*/
#include <inttypes.h>
#include "libavutil/attributes.h"
#include "libavutil/crc.h"
#include "libavutil/mem_internal.h"
#include "internal.h"
#include "avcodec.h"
#include "mpegutils.h"
#include "h264dec.h"
#include "h264data.h"
#include "golomb.h"
#include "hpeldsp.h"
#include "mathops.h"
#include "rectangle.h"
#include "tpeldsp.h"
#if CONFIG_ZLIB
#include <zlib.h>
#endif
#include "svq1.h"
/**
* @file
* svq3 decoder.
*/
typedef struct SVQ3Frame {
AVFrame *f;
int16_t (*motion_val_buf[2])[2];
int16_t (*motion_val[2])[2];
uint32_t *mb_type_buf, *mb_type;
} SVQ3Frame;
typedef struct SVQ3Context {
AVCodecContext *avctx;
H264DSPContext h264dsp;
H264PredContext hpc;
HpelDSPContext hdsp;
TpelDSPContext tdsp;
VideoDSPContext vdsp;
SVQ3Frame *cur_pic;
SVQ3Frame *next_pic;
SVQ3Frame *last_pic;
GetBitContext gb;
GetBitContext gb_slice;
uint8_t *slice_buf;
unsigned slice_buf_size;
int halfpel_flag;
int thirdpel_flag;
int has_watermark;
uint32_t watermark_key;
int adaptive_quant;
int next_p_frame_damaged;
int h_edge_pos;
int v_edge_pos;
int last_frame_output;
int slice_num;
int qscale;
int cbp;
int frame_num;
int frame_num_offset;
int prev_frame_num_offset;
int prev_frame_num;
enum AVPictureType pict_type;
enum AVPictureType slice_type;
int low_delay;
int mb_x, mb_y;
int mb_xy;
int mb_width, mb_height;
int mb_stride, mb_num;
int b_stride;
uint32_t *mb2br_xy;
int chroma_pred_mode;
int intra16x16_pred_mode;
int8_t intra4x4_pred_mode_cache[5 * 8];
int8_t (*intra4x4_pred_mode);
unsigned int top_samples_available;
unsigned int topright_samples_available;
unsigned int left_samples_available;
uint8_t *edge_emu_buffer;
DECLARE_ALIGNED(16, int16_t, mv_cache)[2][5 * 8][2];
DECLARE_ALIGNED(8, int8_t, ref_cache)[2][5 * 8];
DECLARE_ALIGNED(16, int16_t, mb)[16 * 48 * 2];
DECLARE_ALIGNED(16, int16_t, mb_luma_dc)[3][16 * 2];
DECLARE_ALIGNED(8, uint8_t, non_zero_count_cache)[15 * 8];
uint32_t dequant4_coeff[QP_MAX_NUM + 1][16];
int block_offset[2 * (16 * 3)];
SVQ3Frame frames[3];
} SVQ3Context;
#define FULLPEL_MODE 1
#define HALFPEL_MODE 2
#define THIRDPEL_MODE 3
#define PREDICT_MODE 4
/* dual scan (from some older H.264 draft)
* o-->o-->o o
* | /|
* o o o / o
* | / | |/ |
* o o o o
* /
* o-->o-->o-->o
*/
static const uint8_t svq3_scan[16] = {
0 + 0 * 4, 1 + 0 * 4, 2 + 0 * 4, 2 + 1 * 4,
2 + 2 * 4, 3 + 0 * 4, 3 + 1 * 4, 3 + 2 * 4,
0 + 1 * 4, 0 + 2 * 4, 1 + 1 * 4, 1 + 2 * 4,
0 + 3 * 4, 1 + 3 * 4, 2 + 3 * 4, 3 + 3 * 4,
};
static const uint8_t luma_dc_zigzag_scan[16] = {
0 * 16 + 0 * 64, 1 * 16 + 0 * 64, 2 * 16 + 0 * 64, 0 * 16 + 2 * 64,
3 * 16 + 0 * 64, 0 * 16 + 1 * 64, 1 * 16 + 1 * 64, 2 * 16 + 1 * 64,
1 * 16 + 2 * 64, 2 * 16 + 2 * 64, 3 * 16 + 2 * 64, 0 * 16 + 3 * 64,
3 * 16 + 1 * 64, 1 * 16 + 3 * 64, 2 * 16 + 3 * 64, 3 * 16 + 3 * 64,
};
static const uint8_t svq3_pred_0[25][2] = {
{ 0, 0 },
{ 1, 0 }, { 0, 1 },
{ 0, 2 }, { 1, 1 }, { 2, 0 },
{ 3, 0 }, { 2, 1 }, { 1, 2 }, { 0, 3 },
{ 0, 4 }, { 1, 3 }, { 2, 2 }, { 3, 1 }, { 4, 0 },
{ 4, 1 }, { 3, 2 }, { 2, 3 }, { 1, 4 },
{ 2, 4 }, { 3, 3 }, { 4, 2 },
{ 4, 3 }, { 3, 4 },
{ 4, 4 }
};
static const int8_t svq3_pred_1[6][6][5] = {
{ { 2, -1, -1, -1, -1 }, { 2, 1, -1, -1, -1 }, { 1, 2, -1, -1, -1 },
{ 2, 1, -1, -1, -1 }, { 1, 2, -1, -1, -1 }, { 1, 2, -1, -1, -1 } },
{ { 0, 2, -1, -1, -1 }, { 0, 2, 1, 4, 3 }, { 0, 1, 2, 4, 3 },
{ 0, 2, 1, 4, 3 }, { 2, 0, 1, 3, 4 }, { 0, 4, 2, 1, 3 } },
{ { 2, 0, -1, -1, -1 }, { 2, 1, 0, 4, 3 }, { 1, 2, 4, 0, 3 },
{ 2, 1, 0, 4, 3 }, { 2, 1, 4, 3, 0 }, { 1, 2, 4, 0, 3 } },
{ { 2, 0, -1, -1, -1 }, { 2, 0, 1, 4, 3 }, { 1, 2, 0, 4, 3 },
{ 2, 1, 0, 4, 3 }, { 2, 1, 3, 4, 0 }, { 2, 4, 1, 0, 3 } },
{ { 0, 2, -1, -1, -1 }, { 0, 2, 1, 3, 4 }, { 1, 2, 3, 0, 4 },
{ 2, 0, 1, 3, 4 }, { 2, 1, 3, 0, 4 }, { 2, 0, 4, 3, 1 } },
{ { 0, 2, -1, -1, -1 }, { 0, 2, 4, 1, 3 }, { 1, 4, 2, 0, 3 },
{ 4, 2, 0, 1, 3 }, { 2, 0, 1, 4, 3 }, { 4, 2, 1, 0, 3 } },
};
static const struct {
uint8_t run;
uint8_t level;
} svq3_dct_tables[2][16] = {
{ { 0, 0 }, { 0, 1 }, { 1, 1 }, { 2, 1 }, { 0, 2 }, { 3, 1 }, { 4, 1 }, { 5, 1 },
{ 0, 3 }, { 1, 2 }, { 2, 2 }, { 6, 1 }, { 7, 1 }, { 8, 1 }, { 9, 1 }, { 0, 4 } },
{ { 0, 0 }, { 0, 1 }, { 1, 1 }, { 0, 2 }, { 2, 1 }, { 0, 3 }, { 0, 4 }, { 0, 5 },
{ 3, 1 }, { 4, 1 }, { 1, 2 }, { 1, 3 }, { 0, 6 }, { 0, 7 }, { 0, 8 }, { 0, 9 } }
};
static const uint32_t svq3_dequant_coeff[32] = {
3881, 4351, 4890, 5481, 6154, 6914, 7761, 8718,
9781, 10987, 12339, 13828, 15523, 17435, 19561, 21873,
24552, 27656, 30847, 34870, 38807, 43747, 49103, 54683,
61694, 68745, 77615, 89113, 100253, 109366, 126635, 141533
};
static void svq3_luma_dc_dequant_idct_c(int16_t *output, int16_t *input, int qp)
{
const unsigned qmul = svq3_dequant_coeff[qp];
#define stride 16
int i;
int temp[16];
static const uint8_t x_offset[4] = { 0, 1 * stride, 4 * stride, 5 * stride };
for (i = 0; i < 4; i++) {
const int z0 = 13 * (input[4 * i + 0] + input[4 * i + 2]);
const int z1 = 13 * (input[4 * i + 0] - input[4 * i + 2]);
const int z2 = 7 * input[4 * i + 1] - 17 * input[4 * i + 3];
const int z3 = 17 * input[4 * i + 1] + 7 * input[4 * i + 3];
temp[4 * i + 0] = z0 + z3;
temp[4 * i + 1] = z1 + z2;
temp[4 * i + 2] = z1 - z2;
temp[4 * i + 3] = z0 - z3;
}
for (i = 0; i < 4; i++) {
const int offset = x_offset[i];
const int z0 = 13 * (temp[4 * 0 + i] + temp[4 * 2 + i]);
const int z1 = 13 * (temp[4 * 0 + i] - temp[4 * 2 + i]);
const int z2 = 7 * temp[4 * 1 + i] - 17 * temp[4 * 3 + i];
const int z3 = 17 * temp[4 * 1 + i] + 7 * temp[4 * 3 + i];
output[stride * 0 + offset] = (int)((z0 + z3) * qmul + 0x80000) >> 20;
output[stride * 2 + offset] = (int)((z1 + z2) * qmul + 0x80000) >> 20;
output[stride * 8 + offset] = (int)((z1 - z2) * qmul + 0x80000) >> 20;
output[stride * 10 + offset] = (int)((z0 - z3) * qmul + 0x80000) >> 20;
}
}
#undef stride
static void svq3_add_idct_c(uint8_t *dst, int16_t *block,
int stride, int qp, int dc)
{
const int qmul = svq3_dequant_coeff[qp];
int i;
if (dc) {
dc = 13 * 13 * (dc == 1 ? 1538U* block[0]
: qmul * (block[0] >> 3) / 2);
block[0] = 0;
}
for (i = 0; i < 4; i++) {
const int z0 = 13 * (block[0 + 4 * i] + block[2 + 4 * i]);
const int z1 = 13 * (block[0 + 4 * i] - block[2 + 4 * i]);
const int z2 = 7 * block[1 + 4 * i] - 17 * block[3 + 4 * i];
const int z3 = 17 * block[1 + 4 * i] + 7 * block[3 + 4 * i];
block[0 + 4 * i] = z0 + z3;
block[1 + 4 * i] = z1 + z2;
block[2 + 4 * i] = z1 - z2;
block[3 + 4 * i] = z0 - z3;
}
for (i = 0; i < 4; i++) {
const unsigned z0 = 13 * (block[i + 4 * 0] + block[i + 4 * 2]);
const unsigned z1 = 13 * (block[i + 4 * 0] - block[i + 4 * 2]);
const unsigned z2 = 7 * block[i + 4 * 1] - 17 * block[i + 4 * 3];
const unsigned z3 = 17 * block[i + 4 * 1] + 7 * block[i + 4 * 3];
const int rr = (dc + 0x80000u);
dst[i + stride * 0] = av_clip_uint8(dst[i + stride * 0] + ((int)((z0 + z3) * qmul + rr) >> 20));
dst[i + stride * 1] = av_clip_uint8(dst[i + stride * 1] + ((int)((z1 + z2) * qmul + rr) >> 20));
dst[i + stride * 2] = av_clip_uint8(dst[i + stride * 2] + ((int)((z1 - z2) * qmul + rr) >> 20));
dst[i + stride * 3] = av_clip_uint8(dst[i + stride * 3] + ((int)((z0 - z3) * qmul + rr) >> 20));
}
memset(block, 0, 16 * sizeof(int16_t));
}
static inline int svq3_decode_block(GetBitContext *gb, int16_t *block,
int index, const int type)
{
static const uint8_t *const scan_patterns[4] = {
luma_dc_zigzag_scan, ff_zigzag_scan, svq3_scan, ff_h264_chroma_dc_scan
};
int run, level, sign, limit;
unsigned vlc;
const int intra = 3 * type >> 2;
const uint8_t *const scan = scan_patterns[type];
for (limit = (16 >> intra); index < 16; index = limit, limit += 8) {
for (; (vlc = get_interleaved_ue_golomb(gb)) != 0; index++) {
if ((int32_t)vlc < 0)
return -1;
sign = (vlc & 1) ? 0 : -1;
vlc = vlc + 1 >> 1;
if (type == 3) {
if (vlc < 3) {
run = 0;
level = vlc;
} else if (vlc < 4) {
run = 1;
level = 1;
} else {
run = vlc & 0x3;
level = (vlc + 9 >> 2) - run;
}
} else {
if (vlc < 16U) {
run = svq3_dct_tables[intra][vlc].run;
level = svq3_dct_tables[intra][vlc].level;
} else if (intra) {
run = vlc & 0x7;
level = (vlc >> 3) + ((run == 0) ? 8 : ((run < 2) ? 2 : ((run < 5) ? 0 : -1)));
} else {
run = vlc & 0xF;
level = (vlc >> 4) + ((run == 0) ? 4 : ((run < 3) ? 2 : ((run < 10) ? 1 : 0)));
}
}
if ((index += run) >= limit)
return -1;
block[scan[index]] = (level ^ sign) - sign;
}
if (type != 2) {
break;
}
}
return 0;
}
static av_always_inline int
svq3_fetch_diagonal_mv(const SVQ3Context *s, const int16_t **C,
int i, int list, int part_width)
{
const int topright_ref = s->ref_cache[list][i - 8 + part_width];
if (topright_ref != PART_NOT_AVAILABLE) {
*C = s->mv_cache[list][i - 8 + part_width];
return topright_ref;
} else {
*C = s->mv_cache[list][i - 8 - 1];
return s->ref_cache[list][i - 8 - 1];
}
}
/**
* Get the predicted MV.
* @param n the block index
* @param part_width the width of the partition (4, 8,16) -> (1, 2, 4)
* @param mx the x component of the predicted motion vector
* @param my the y component of the predicted motion vector
*/
static av_always_inline void svq3_pred_motion(const SVQ3Context *s, int n,
int part_width, int list,
int ref, int *const mx, int *const my)
{
const int index8 = scan8[n];
const int top_ref = s->ref_cache[list][index8 - 8];
const int left_ref = s->ref_cache[list][index8 - 1];
const int16_t *const A = s->mv_cache[list][index8 - 1];
const int16_t *const B = s->mv_cache[list][index8 - 8];
const int16_t *C;
int diagonal_ref, match_count;
/* mv_cache
* B . . A T T T T
* U . . L . . , .
* U . . L . . . .
* U . . L . . , .
* . . . L . . . .
*/
diagonal_ref = svq3_fetch_diagonal_mv(s, &C, index8, list, part_width);
match_count = (diagonal_ref == ref) + (top_ref == ref) + (left_ref == ref);
if (match_count > 1) { //most common
*mx = mid_pred(A[0], B[0], C[0]);
*my = mid_pred(A[1], B[1], C[1]);
} else if (match_count == 1) {
if (left_ref == ref) {
*mx = A[0];
*my = A[1];
} else if (top_ref == ref) {
*mx = B[0];
*my = B[1];
} else {
*mx = C[0];
*my = C[1];
}
} else {
if (top_ref == PART_NOT_AVAILABLE &&
diagonal_ref == PART_NOT_AVAILABLE &&
left_ref != PART_NOT_AVAILABLE) {
*mx = A[0];
*my = A[1];
} else {
*mx = mid_pred(A[0], B[0], C[0]);
*my = mid_pred(A[1], B[1], C[1]);
}
}
}
static inline void svq3_mc_dir_part(SVQ3Context *s,
int x, int y, int width, int height,
int mx, int my, int dxy,
int thirdpel, int dir, int avg)
{
const SVQ3Frame *pic = (dir == 0) ? s->last_pic : s->next_pic;
uint8_t *src, *dest;
int i, emu = 0;
int blocksize = 2 - (width >> 3); // 16->0, 8->1, 4->2
int linesize = s->cur_pic->f->linesize[0];
int uvlinesize = s->cur_pic->f->linesize[1];
mx += x;
my += y;
if (mx < 0 || mx >= s->h_edge_pos - width - 1 ||
my < 0 || my >= s->v_edge_pos - height - 1) {
emu = 1;
mx = av_clip(mx, -16, s->h_edge_pos - width + 15);
my = av_clip(my, -16, s->v_edge_pos - height + 15);
}
/* form component predictions */
dest = s->cur_pic->f->data[0] + x + y * linesize;
src = pic->f->data[0] + mx + my * linesize;
if (emu) {
s->vdsp.emulated_edge_mc(s->edge_emu_buffer, src,
linesize, linesize,
width + 1, height + 1,
mx, my, s->h_edge_pos, s->v_edge_pos);
src = s->edge_emu_buffer;
}
if (thirdpel)
(avg ? s->tdsp.avg_tpel_pixels_tab
: s->tdsp.put_tpel_pixels_tab)[dxy](dest, src, linesize,
width, height);
else
(avg ? s->hdsp.avg_pixels_tab
: s->hdsp.put_pixels_tab)[blocksize][dxy](dest, src, linesize,
height);
if (!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
mx = mx + (mx < (int) x) >> 1;
my = my + (my < (int) y) >> 1;
width = width >> 1;
height = height >> 1;
blocksize++;
for (i = 1; i < 3; i++) {
dest = s->cur_pic->f->data[i] + (x >> 1) + (y >> 1) * uvlinesize;
src = pic->f->data[i] + mx + my * uvlinesize;
if (emu) {
s->vdsp.emulated_edge_mc(s->edge_emu_buffer, src,
uvlinesize, uvlinesize,
width + 1, height + 1,
mx, my, (s->h_edge_pos >> 1),
s->v_edge_pos >> 1);
src = s->edge_emu_buffer;
}
if (thirdpel)
(avg ? s->tdsp.avg_tpel_pixels_tab
: s->tdsp.put_tpel_pixels_tab)[dxy](dest, src,
uvlinesize,
width, height);
else
(avg ? s->hdsp.avg_pixels_tab
: s->hdsp.put_pixels_tab)[blocksize][dxy](dest, src,
uvlinesize,
height);
}
}
}
static inline int svq3_mc_dir(SVQ3Context *s, int size, int mode,
int dir, int avg)
{
int i, j, k, mx, my, dx, dy, x, y;
const int part_width = ((size & 5) == 4) ? 4 : 16 >> (size & 1);
const int part_height = 16 >> ((unsigned)(size + 1) / 3);
const int extra_width = (mode == PREDICT_MODE) ? -16 * 6 : 0;
const int h_edge_pos = 6 * (s->h_edge_pos - part_width) - extra_width;
const int v_edge_pos = 6 * (s->v_edge_pos - part_height) - extra_width;
for (i = 0; i < 16; i += part_height)
for (j = 0; j < 16; j += part_width) {
const int b_xy = (4 * s->mb_x + (j >> 2)) +
(4 * s->mb_y + (i >> 2)) * s->b_stride;
int dxy;
x = 16 * s->mb_x + j;
y = 16 * s->mb_y + i;
k = (j >> 2 & 1) + (i >> 1 & 2) +
(j >> 1 & 4) + (i & 8);
if (mode != PREDICT_MODE) {
svq3_pred_motion(s, k, part_width >> 2, dir, 1, &mx, &my);
} else {
mx = s->next_pic->motion_val[0][b_xy][0] * 2;
my = s->next_pic->motion_val[0][b_xy][1] * 2;
if (dir == 0) {
mx = mx * s->frame_num_offset /
s->prev_frame_num_offset + 1 >> 1;
my = my * s->frame_num_offset /
s->prev_frame_num_offset + 1 >> 1;
} else {
mx = mx * (s->frame_num_offset - s->prev_frame_num_offset) /
s->prev_frame_num_offset + 1 >> 1;
my = my * (s->frame_num_offset - s->prev_frame_num_offset) /
s->prev_frame_num_offset + 1 >> 1;
}
}
/* clip motion vector prediction to frame border */
mx = av_clip(mx, extra_width - 6 * x, h_edge_pos - 6 * x);
my = av_clip(my, extra_width - 6 * y, v_edge_pos - 6 * y);
/* get (optional) motion vector differential */
if (mode == PREDICT_MODE) {
dx = dy = 0;
} else {
dy = get_interleaved_se_golomb(&s->gb_slice);
dx = get_interleaved_se_golomb(&s->gb_slice);
if (dx != (int16_t)dx || dy != (int16_t)dy) {
av_log(s->avctx, AV_LOG_ERROR, "invalid MV vlc\n");
return -1;
}
}
/* compute motion vector */
if (mode == THIRDPEL_MODE) {
int fx, fy;
mx = (mx + 1 >> 1) + dx;
my = (my + 1 >> 1) + dy;
fx = (unsigned)(mx + 0x30000) / 3 - 0x10000;
fy = (unsigned)(my + 0x30000) / 3 - 0x10000;
dxy = (mx - 3 * fx) + 4 * (my - 3 * fy);
svq3_mc_dir_part(s, x, y, part_width, part_height,
fx, fy, dxy, 1, dir, avg);
mx += mx;
my += my;
} else if (mode == HALFPEL_MODE || mode == PREDICT_MODE) {
mx = (unsigned)(mx + 1 + 0x30000) / 3 + dx - 0x10000;
my = (unsigned)(my + 1 + 0x30000) / 3 + dy - 0x10000;
dxy = (mx & 1) + 2 * (my & 1);
svq3_mc_dir_part(s, x, y, part_width, part_height,
mx >> 1, my >> 1, dxy, 0, dir, avg);
mx *= 3;
my *= 3;
} else {
mx = (unsigned)(mx + 3 + 0x60000) / 6 + dx - 0x10000;
my = (unsigned)(my + 3 + 0x60000) / 6 + dy - 0x10000;
svq3_mc_dir_part(s, x, y, part_width, part_height,
mx, my, 0, 0, dir, avg);
mx *= 6;
my *= 6;
}
/* update mv_cache */
if (mode != PREDICT_MODE) {
int32_t mv = pack16to32(mx, my);
if (part_height == 8 && i < 8) {
AV_WN32A(s->mv_cache[dir][scan8[k] + 1 * 8], mv);
if (part_width == 8 && j < 8)
AV_WN32A(s->mv_cache[dir][scan8[k] + 1 + 1 * 8], mv);
}
if (part_width == 8 && j < 8)
AV_WN32A(s->mv_cache[dir][scan8[k] + 1], mv);
if (part_width == 4 || part_height == 4)
AV_WN32A(s->mv_cache[dir][scan8[k]], mv);
}
/* write back motion vectors */
fill_rectangle(s->cur_pic->motion_val[dir][b_xy],
part_width >> 2, part_height >> 2, s->b_stride,
pack16to32(mx, my), 4);
}
return 0;
}
static av_always_inline void hl_decode_mb_idct_luma(SVQ3Context *s,
int mb_type, const int *block_offset,
int linesize, uint8_t *dest_y)
{
int i;
if (!IS_INTRA4x4(mb_type)) {
for (i = 0; i < 16; i++)
if (s->non_zero_count_cache[scan8[i]] || s->mb[i * 16]) {
uint8_t *const ptr = dest_y + block_offset[i];
svq3_add_idct_c(ptr, s->mb + i * 16, linesize,
s->qscale, IS_INTRA(mb_type) ? 1 : 0);
}
}
}
static av_always_inline void hl_decode_mb_predict_luma(SVQ3Context *s,
int mb_type,
const int *block_offset,
int linesize,
uint8_t *dest_y)
{
int i;
int qscale = s->qscale;
if (IS_INTRA4x4(mb_type)) {
for (i = 0; i < 16; i++) {
uint8_t *const ptr = dest_y + block_offset[i];
const int dir = s->intra4x4_pred_mode_cache[scan8[i]];
uint8_t *topright;
int nnz, tr;
if (dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED) {
const int topright_avail = (s->topright_samples_available << i) & 0x8000;
av_assert2(s->mb_y || linesize <= block_offset[i]);
if (!topright_avail) {
tr = ptr[3 - linesize] * 0x01010101u;
topright = (uint8_t *)&tr;
} else
topright = ptr + 4 - linesize;
} else
topright = NULL;
s->hpc.pred4x4[dir](ptr, topright, linesize);
nnz = s->non_zero_count_cache[scan8[i]];
if (nnz) {
svq3_add_idct_c(ptr, s->mb + i * 16, linesize, qscale, 0);
}
}
} else {
s->hpc.pred16x16[s->intra16x16_pred_mode](dest_y, linesize);
svq3_luma_dc_dequant_idct_c(s->mb, s->mb_luma_dc[0], qscale);
}
}
static void hl_decode_mb(SVQ3Context *s)
{
const int mb_x = s->mb_x;
const int mb_y = s->mb_y;
const int mb_xy = s->mb_xy;
const int mb_type = s->cur_pic->mb_type[mb_xy];
uint8_t *dest_y, *dest_cb, *dest_cr;
int linesize, uvlinesize;
int i, j;
const int *block_offset = &s->block_offset[0];
const int block_h = 16 >> 1;
linesize = s->cur_pic->f->linesize[0];
uvlinesize = s->cur_pic->f->linesize[1];
dest_y = s->cur_pic->f->data[0] + (mb_x + mb_y * linesize) * 16;
dest_cb = s->cur_pic->f->data[1] + mb_x * 8 + mb_y * uvlinesize * block_h;
dest_cr = s->cur_pic->f->data[2] + mb_x * 8 + mb_y * uvlinesize * block_h;
s->vdsp.prefetch(dest_y + (s->mb_x & 3) * 4 * linesize + 64, linesize, 4);
s->vdsp.prefetch(dest_cb + (s->mb_x & 7) * uvlinesize + 64, dest_cr - dest_cb, 2);
if (IS_INTRA(mb_type)) {
s->hpc.pred8x8[s->chroma_pred_mode](dest_cb, uvlinesize);
s->hpc.pred8x8[s->chroma_pred_mode](dest_cr, uvlinesize);
hl_decode_mb_predict_luma(s, mb_type, block_offset, linesize, dest_y);
}
hl_decode_mb_idct_luma(s, mb_type, block_offset, linesize, dest_y);
if (s->cbp & 0x30) {
uint8_t *dest[2] = { dest_cb, dest_cr };
s->h264dsp.h264_chroma_dc_dequant_idct(s->mb + 16 * 16 * 1,
s->dequant4_coeff[4][0]);
s->h264dsp.h264_chroma_dc_dequant_idct(s->mb + 16 * 16 * 2,
s->dequant4_coeff[4][0]);
for (j = 1; j < 3; j++) {
for (i = j * 16; i < j * 16 + 4; i++)
if (s->non_zero_count_cache[scan8[i]] || s->mb[i * 16]) {
uint8_t *const ptr = dest[j - 1] + block_offset[i];
svq3_add_idct_c(ptr, s->mb + i * 16,
uvlinesize, ff_h264_chroma_qp[0][s->qscale + 12] - 12, 2);
}
}
}
}
static int svq3_decode_mb(SVQ3Context *s, unsigned int mb_type)
{
int i, j, k, m, dir, mode;
int cbp = 0;
uint32_t vlc;
int8_t *top, *left;
const int mb_xy = s->mb_xy;
const int b_xy = 4 * s->mb_x + 4 * s->mb_y * s->b_stride;
s->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF;
s->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF;
s->topright_samples_available = 0xFFFF;
if (mb_type == 0) { /* SKIP */
if (s->pict_type == AV_PICTURE_TYPE_P ||
s->next_pic->mb_type[mb_xy] == -1) {
svq3_mc_dir_part(s, 16 * s->mb_x, 16 * s->mb_y, 16, 16,
0, 0, 0, 0, 0, 0);
if (s->pict_type == AV_PICTURE_TYPE_B)
svq3_mc_dir_part(s, 16 * s->mb_x, 16 * s->mb_y, 16, 16,
0, 0, 0, 0, 1, 1);
mb_type = MB_TYPE_SKIP;
} else {
mb_type = FFMIN(s->next_pic->mb_type[mb_xy], 6);
if (svq3_mc_dir(s, mb_type, PREDICT_MODE, 0, 0) < 0)
return -1;
if (svq3_mc_dir(s, mb_type, PREDICT_MODE, 1, 1) < 0)
return -1;
mb_type = MB_TYPE_16x16;
}
} else if (mb_type < 8) { /* INTER */
if (s->thirdpel_flag && s->halfpel_flag == !get_bits1(&s->gb_slice))
mode = THIRDPEL_MODE;
else if (s->halfpel_flag &&
s->thirdpel_flag == !get_bits1(&s->gb_slice))
mode = HALFPEL_MODE;
else
mode = FULLPEL_MODE;
/* fill caches */
/* note ref_cache should contain here:
* ????????
* ???11111
* N??11111
* N??11111
* N??11111
*/
for (m = 0; m < 2; m++) {
if (s->mb_x > 0 && s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - 1] + 6] != -1) {
for (i = 0; i < 4; i++)
AV_COPY32(s->mv_cache[m][scan8[0] - 1 + i * 8],
s->cur_pic->motion_val[m][b_xy - 1 + i * s->b_stride]);
} else {
for (i = 0; i < 4; i++)
AV_ZERO32(s->mv_cache[m][scan8[0] - 1 + i * 8]);
}
if (s->mb_y > 0) {
memcpy(s->mv_cache[m][scan8[0] - 1 * 8],
s->cur_pic->motion_val[m][b_xy - s->b_stride],
4 * 2 * sizeof(int16_t));
memset(&s->ref_cache[m][scan8[0] - 1 * 8],
(s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride]] == -1) ? PART_NOT_AVAILABLE : 1, 4);
if (s->mb_x < s->mb_width - 1) {
AV_COPY32(s->mv_cache[m][scan8[0] + 4 - 1 * 8],
s->cur_pic->motion_val[m][b_xy - s->b_stride + 4]);
s->ref_cache[m][scan8[0] + 4 - 1 * 8] =
(s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride + 1] + 6] == -1 ||
s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride]] == -1) ? PART_NOT_AVAILABLE : 1;
} else
s->ref_cache[m][scan8[0] + 4 - 1 * 8] = PART_NOT_AVAILABLE;
if (s->mb_x > 0) {
AV_COPY32(s->mv_cache[m][scan8[0] - 1 - 1 * 8],
s->cur_pic->motion_val[m][b_xy - s->b_stride - 1]);
s->ref_cache[m][scan8[0] - 1 - 1 * 8] =
(s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride - 1] + 3] == -1) ? PART_NOT_AVAILABLE : 1;
} else
s->ref_cache[m][scan8[0] - 1 - 1 * 8] = PART_NOT_AVAILABLE;
} else
memset(&s->ref_cache[m][scan8[0] - 1 * 8 - 1],
PART_NOT_AVAILABLE, 8);
if (s->pict_type != AV_PICTURE_TYPE_B)
break;
}
/* decode motion vector(s) and form prediction(s) */
if (s->pict_type == AV_PICTURE_TYPE_P) {
if (svq3_mc_dir(s, mb_type - 1, mode, 0, 0) < 0)
return -1;
} else { /* AV_PICTURE_TYPE_B */
if (mb_type != 2) {
if (svq3_mc_dir(s, 0, mode, 0, 0) < 0)
return -1;
} else {
for (i = 0; i < 4; i++)
memset(s->cur_pic->motion_val[0][b_xy + i * s->b_stride],
0, 4 * 2 * sizeof(int16_t));
}
if (mb_type != 1) {
if (svq3_mc_dir(s, 0, mode, 1, mb_type == 3) < 0)
return -1;
} else {
for (i = 0; i < 4; i++)
memset(s->cur_pic->motion_val[1][b_xy + i * s->b_stride],
0, 4 * 2 * sizeof(int16_t));
}
}
mb_type = MB_TYPE_16x16;
} else if (mb_type == 8 || mb_type == 33) { /* INTRA4x4 */
int8_t *i4x4 = s->intra4x4_pred_mode + s->mb2br_xy[s->mb_xy];
int8_t *i4x4_cache = s->intra4x4_pred_mode_cache;
memset(s->intra4x4_pred_mode_cache, -1, 8 * 5 * sizeof(int8_t));
if (mb_type == 8) {
if (s->mb_x > 0) {
for (i = 0; i < 4; i++)
s->intra4x4_pred_mode_cache[scan8[0] - 1 + i * 8] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - 1] + 6 - i];
if (s->intra4x4_pred_mode_cache[scan8[0] - 1] == -1)
s->left_samples_available = 0x5F5F;
}
if (s->mb_y > 0) {
s->intra4x4_pred_mode_cache[4 + 8 * 0] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride] + 0];
s->intra4x4_pred_mode_cache[5 + 8 * 0] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride] + 1];
s->intra4x4_pred_mode_cache[6 + 8 * 0] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride] + 2];
s->intra4x4_pred_mode_cache[7 + 8 * 0] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride] + 3];
if (s->intra4x4_pred_mode_cache[4 + 8 * 0] == -1)
s->top_samples_available = 0x33FF;
}
/* decode prediction codes for luma blocks */
for (i = 0; i < 16; i += 2) {
vlc = get_interleaved_ue_golomb(&s->gb_slice);
if (vlc >= 25U) {
av_log(s->avctx, AV_LOG_ERROR,
"luma prediction:%"PRIu32"\n", vlc);
return -1;
}
left = &s->intra4x4_pred_mode_cache[scan8[i] - 1];
top = &s->intra4x4_pred_mode_cache[scan8[i] - 8];
left[1] = svq3_pred_1[top[0] + 1][left[0] + 1][svq3_pred_0[vlc][0]];
left[2] = svq3_pred_1[top[1] + 1][left[1] + 1][svq3_pred_0[vlc][1]];
if (left[1] == -1 || left[2] == -1) {
av_log(s->avctx, AV_LOG_ERROR, "weird prediction\n");
return -1;
}
}
} else { /* mb_type == 33, DC_128_PRED block type */
for (i = 0; i < 4; i++)
memset(&s->intra4x4_pred_mode_cache[scan8[0] + 8 * i], DC_PRED, 4);
}
AV_COPY32(i4x4, i4x4_cache + 4 + 8 * 4);
i4x4[4] = i4x4_cache[7 + 8 * 3];
i4x4[5] = i4x4_cache[7 + 8 * 2];
i4x4[6] = i4x4_cache[7 + 8 * 1];
if (mb_type == 8) {
ff_h264_check_intra4x4_pred_mode(s->intra4x4_pred_mode_cache,
s->avctx, s->top_samples_available,
s->left_samples_available);
s->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF;
s->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF;
} else {
for (i = 0; i < 4; i++)
memset(&s->intra4x4_pred_mode_cache[scan8[0] + 8 * i], DC_128_PRED, 4);
s->top_samples_available = 0x33FF;
s->left_samples_available = 0x5F5F;
}
mb_type = MB_TYPE_INTRA4x4;
} else { /* INTRA16x16 */
dir = ff_h264_i_mb_type_info[mb_type - 8].pred_mode;
dir = (dir >> 1) ^ 3 * (dir & 1) ^ 1;
if ((s->intra16x16_pred_mode = ff_h264_check_intra_pred_mode(s->avctx, s->top_samples_available,
s->left_samples_available, dir, 0)) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "ff_h264_check_intra_pred_mode < 0\n");
return s->intra16x16_pred_mode;
}
cbp = ff_h264_i_mb_type_info[mb_type - 8].cbp;
mb_type = MB_TYPE_INTRA16x16;
}
if (!IS_INTER(mb_type) && s->pict_type != AV_PICTURE_TYPE_I) {
for (i = 0; i < 4; i++)
memset(s->cur_pic->motion_val[0][b_xy + i * s->b_stride],
0, 4 * 2 * sizeof(int16_t));
if (s->pict_type == AV_PICTURE_TYPE_B) {
for (i = 0; i < 4; i++)
memset(s->cur_pic->motion_val[1][b_xy + i * s->b_stride],
0, 4 * 2 * sizeof(int16_t));
}
}
if (!IS_INTRA4x4(mb_type)) {
memset(s->intra4x4_pred_mode + s->mb2br_xy[mb_xy], DC_PRED, 8);
}
if (!IS_SKIP(mb_type) || s->pict_type == AV_PICTURE_TYPE_B) {
memset(s->non_zero_count_cache + 8, 0, 14 * 8 * sizeof(uint8_t));
}
if (!IS_INTRA16x16(mb_type) &&
(!IS_SKIP(mb_type) || s->pict_type == AV_PICTURE_TYPE_B)) {
if ((vlc = get_interleaved_ue_golomb(&s->gb_slice)) >= 48U){
av_log(s->avctx, AV_LOG_ERROR, "cbp_vlc=%"PRIu32"\n", vlc);
return -1;
}
cbp = IS_INTRA(mb_type) ? ff_h264_golomb_to_intra4x4_cbp[vlc]
: ff_h264_golomb_to_inter_cbp[vlc];
}
if (IS_INTRA16x16(mb_type) ||
(s->pict_type != AV_PICTURE_TYPE_I && s->adaptive_quant && cbp)) {
s->qscale += get_interleaved_se_golomb(&s->gb_slice);
if (s->qscale > 31u) {
av_log(s->avctx, AV_LOG_ERROR, "qscale:%d\n", s->qscale);
return -1;
}
}
if (IS_INTRA16x16(mb_type)) {
AV_ZERO128(s->mb_luma_dc[0] + 0);
AV_ZERO128(s->mb_luma_dc[0] + 8);
if (svq3_decode_block(&s->gb_slice, s->mb_luma_dc[0], 0, 1)) {
av_log(s->avctx, AV_LOG_ERROR,
"error while decoding intra luma dc\n");
return -1;
}
}
if (cbp) {
const int index = IS_INTRA16x16(mb_type) ? 1 : 0;
const int type = ((s->qscale < 24 && IS_INTRA4x4(mb_type)) ? 2 : 1);
for (i = 0; i < 4; i++)
if ((cbp & (1 << i))) {
for (j = 0; j < 4; j++) {
k = index ? (1 * (j & 1) + 2 * (i & 1) +
2 * (j & 2) + 4 * (i & 2))
: (4 * i + j);
s->non_zero_count_cache[scan8[k]] = 1;
if (svq3_decode_block(&s->gb_slice, &s->mb[16 * k], index, type)) {
av_log(s->avctx, AV_LOG_ERROR,
"error while decoding block\n");
return -1;
}
}
}
if ((cbp & 0x30)) {
for (i = 1; i < 3; ++i)
if (svq3_decode_block(&s->gb_slice, &s->mb[16 * 16 * i], 0, 3)) {
av_log(s->avctx, AV_LOG_ERROR,
"error while decoding chroma dc block\n");
return -1;
}
if ((cbp & 0x20)) {
for (i = 1; i < 3; i++) {
for (j = 0; j < 4; j++) {
k = 16 * i + j;
s->non_zero_count_cache[scan8[k]] = 1;
if (svq3_decode_block(&s->gb_slice, &s->mb[16 * k], 1, 1)) {
av_log(s->avctx, AV_LOG_ERROR,
"error while decoding chroma ac block\n");
return -1;
}
}
}
}
}
}
s->cbp = cbp;
s->cur_pic->mb_type[mb_xy] = mb_type;
if (IS_INTRA(mb_type))
s->chroma_pred_mode = ff_h264_check_intra_pred_mode(s->avctx, s->top_samples_available,
s->left_samples_available, DC_PRED8x8, 1);
return 0;
}
static int svq3_decode_slice_header(AVCodecContext *avctx)
{
SVQ3Context *s = avctx->priv_data;
const int mb_xy = s->mb_xy;
int i, header;
unsigned slice_id;
header = get_bits(&s->gb, 8);
if (((header & 0x9F) != 1 && (header & 0x9F) != 2) || (header & 0x60) == 0) {
/* TODO: what? */
av_log(avctx, AV_LOG_ERROR, "unsupported slice header (%02X)\n", header);
return -1;
} else {
int slice_bits, slice_bytes, slice_length;
int length = header >> 5 & 3;
slice_length = show_bits(&s->gb, 8 * length);
slice_bits = slice_length * 8;
slice_bytes = slice_length + length - 1;
skip_bits(&s->gb, 8);
av_fast_padded_malloc(&s->slice_buf, &s->slice_buf_size, slice_bytes);
if (!s->slice_buf)
return AVERROR(ENOMEM);
if (slice_bytes * 8LL > get_bits_left(&s->gb)) {
av_log(avctx, AV_LOG_ERROR, "slice after bitstream end\n");
return AVERROR_INVALIDDATA;
}
memcpy(s->slice_buf, s->gb.buffer + s->gb.index / 8, slice_bytes);
if (s->watermark_key) {
uint32_t header = AV_RL32(&s->slice_buf[1]);
AV_WL32(&s->slice_buf[1], header ^ s->watermark_key);
}
init_get_bits(&s->gb_slice, s->slice_buf, slice_bits);
if (length > 0) {
memmove(s->slice_buf, &s->slice_buf[slice_length], length - 1);
}
skip_bits_long(&s->gb, slice_bytes * 8);
}
if ((slice_id = get_interleaved_ue_golomb(&s->gb_slice)) >= 3) {
av_log(s->avctx, AV_LOG_ERROR, "illegal slice type %u \n", slice_id);
return -1;
}
s->slice_type = ff_h264_golomb_to_pict_type[slice_id];
if ((header & 0x9F) == 2) {
i = (s->mb_num < 64) ? 6 : (1 + av_log2(s->mb_num - 1));
get_bits(&s->gb_slice, i);
} else if (get_bits1(&s->gb_slice)) {
avpriv_report_missing_feature(s->avctx, "Media key encryption");
return AVERROR_PATCHWELCOME;
}
s->slice_num = get_bits(&s->gb_slice, 8);
s->qscale = get_bits(&s->gb_slice, 5);
s->adaptive_quant = get_bits1(&s->gb_slice);
/* unknown fields */
skip_bits1(&s->gb_slice);
if (s->has_watermark)
skip_bits1(&s->gb_slice);
skip_bits1(&s->gb_slice);
skip_bits(&s->gb_slice, 2);
if (skip_1stop_8data_bits(&s->gb_slice) < 0)
return AVERROR_INVALIDDATA;
/* reset intra predictors and invalidate motion vector references */
if (s->mb_x > 0) {
memset(s->intra4x4_pred_mode + s->mb2br_xy[mb_xy - 1] + 3,
-1, 4 * sizeof(int8_t));
memset(s->intra4x4_pred_mode + s->mb2br_xy[mb_xy - s->mb_x],
-1, 8 * sizeof(int8_t) * s->mb_x);
}
if (s->mb_y > 0) {
memset(s->intra4x4_pred_mode + s->mb2br_xy[mb_xy - s->mb_stride],
-1, 8 * sizeof(int8_t) * (s->mb_width - s->mb_x));
if (s->mb_x > 0)
s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride - 1] + 3] = -1;
}
return 0;
}
static void init_dequant4_coeff_table(SVQ3Context *s)
{
int q, x;
const int max_qp = 51;
for (q = 0; q < max_qp + 1; q++) {
int shift = ff_h264_quant_div6[q] + 2;
int idx = ff_h264_quant_rem6[q];
for (x = 0; x < 16; x++)
s->dequant4_coeff[q][(x >> 2) | ((x << 2) & 0xF)] =
((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] * 16) << shift;
}
}
static av_cold int svq3_decode_init(AVCodecContext *avctx)
{
SVQ3Context *s = avctx->priv_data;
int m, x, y;
unsigned char *extradata;
unsigned char *extradata_end;
unsigned int size;
int marker_found = 0;
int ret;
s->cur_pic = &s->frames[0];
s->last_pic = &s->frames[1];
s->next_pic = &s->frames[2];
s->cur_pic->f = av_frame_alloc();
s->last_pic->f = av_frame_alloc();
s->next_pic->f = av_frame_alloc();
if (!s->cur_pic->f || !s->last_pic->f || !s->next_pic->f)
return AVERROR(ENOMEM);
ff_h264dsp_init(&s->h264dsp, 8, 1);
ff_h264_pred_init(&s->hpc, AV_CODEC_ID_SVQ3, 8, 1);
ff_videodsp_init(&s->vdsp, 8);
avctx->bits_per_raw_sample = 8;
ff_hpeldsp_init(&s->hdsp, avctx->flags);
ff_tpeldsp_init(&s->tdsp);
avctx->pix_fmt = AV_PIX_FMT_YUVJ420P;
avctx->color_range = AVCOL_RANGE_JPEG;
s->avctx = avctx;
s->halfpel_flag = 1;
s->thirdpel_flag = 1;
s->has_watermark = 0;
/* prowl for the "SEQH" marker in the extradata */
extradata = (unsigned char *)avctx->extradata;
extradata_end = avctx->extradata + avctx->extradata_size;
if (extradata) {
for (m = 0; m + 8 < avctx->extradata_size; m++) {
if (!memcmp(extradata, "SEQH", 4)) {
marker_found = 1;
break;
}
extradata++;
}
}
/* if a match was found, parse the extra data */
if (marker_found) {
GetBitContext gb;
int frame_size_code;
int unk0, unk1, unk2, unk3, unk4;
int w,h;
size = AV_RB32(&extradata[4]);
if (size > extradata_end - extradata - 8)
return AVERROR_INVALIDDATA;
init_get_bits(&gb, extradata + 8, size * 8);
/* 'frame size code' and optional 'width, height' */
frame_size_code = get_bits(&gb, 3);
switch (frame_size_code) {
case 0:
w = 160;
h = 120;
break;
case 1:
w = 128;
h = 96;
break;
case 2:
w = 176;
h = 144;
break;
case 3:
w = 352;
h = 288;
break;
case 4:
w = 704;
h = 576;
break;
case 5:
w = 240;
h = 180;
break;
case 6:
w = 320;
h = 240;
break;
case 7:
w = get_bits(&gb, 12);
h = get_bits(&gb, 12);
break;
}
ret = ff_set_dimensions(avctx, w, h);
if (ret < 0)
return ret;
s->halfpel_flag = get_bits1(&gb);
s->thirdpel_flag = get_bits1(&gb);
/* unknown fields */
unk0 = get_bits1(&gb);
unk1 = get_bits1(&gb);
unk2 = get_bits1(&gb);
unk3 = get_bits1(&gb);
s->low_delay = get_bits1(&gb);
/* unknown field */
unk4 = get_bits1(&gb);
av_log(avctx, AV_LOG_DEBUG, "Unknown fields %d %d %d %d %d\n",
unk0, unk1, unk2, unk3, unk4);
if (skip_1stop_8data_bits(&gb) < 0)
return AVERROR_INVALIDDATA;
s->has_watermark = get_bits1(&gb);
avctx->has_b_frames = !s->low_delay;
if (s->has_watermark) {
#if CONFIG_ZLIB
unsigned watermark_width = get_interleaved_ue_golomb(&gb);
unsigned watermark_height = get_interleaved_ue_golomb(&gb);
int u1 = get_interleaved_ue_golomb(&gb);
int u2 = get_bits(&gb, 8);
int u3 = get_bits(&gb, 2);
int u4 = get_interleaved_ue_golomb(&gb);
unsigned long buf_len = watermark_width *
watermark_height * 4;
int offset = get_bits_count(&gb) + 7 >> 3;
uint8_t *buf;
if (watermark_height <= 0 ||
(uint64_t)watermark_width * 4 > UINT_MAX / watermark_height)
return AVERROR_INVALIDDATA;
buf = av_malloc(buf_len);
if (!buf)
return AVERROR(ENOMEM);
av_log(avctx, AV_LOG_DEBUG, "watermark size: %ux%u\n",
watermark_width, watermark_height);
av_log(avctx, AV_LOG_DEBUG,
"u1: %x u2: %x u3: %x compressed data size: %d offset: %d\n",
u1, u2, u3, u4, offset);
if (uncompress(buf, &buf_len, extradata + 8 + offset,
size - offset) != Z_OK) {
av_log(avctx, AV_LOG_ERROR,
"could not uncompress watermark logo\n");
av_free(buf);
return -1;
}
s->watermark_key = av_bswap16(av_crc(av_crc_get_table(AV_CRC_16_CCITT), 0, buf, buf_len));
s->watermark_key = s->watermark_key << 16 | s->watermark_key;
av_log(avctx, AV_LOG_DEBUG,
"watermark key %#"PRIx32"\n", s->watermark_key);
av_free(buf);
#else
av_log(avctx, AV_LOG_ERROR,
"this svq3 file contains watermark which need zlib support compiled in\n");
return AVERROR(ENOSYS);
#endif
}
}
s->mb_width = (avctx->width + 15) / 16;
s->mb_height = (avctx->height + 15) / 16;
s->mb_stride = s->mb_width + 1;
s->mb_num = s->mb_width * s->mb_height;
s->b_stride = 4 * s->mb_width;
s->h_edge_pos = s->mb_width * 16;
s->v_edge_pos = s->mb_height * 16;
s->intra4x4_pred_mode = av_mallocz(s->mb_stride * 2 * 8);
if (!s->intra4x4_pred_mode)
return AVERROR(ENOMEM);
s->mb2br_xy = av_mallocz(s->mb_stride * (s->mb_height + 1) *
sizeof(*s->mb2br_xy));
if (!s->mb2br_xy)
return AVERROR(ENOMEM);
for (y = 0; y < s->mb_height; y++)
for (x = 0; x < s->mb_width; x++) {
const int mb_xy = x + y * s->mb_stride;
s->mb2br_xy[mb_xy] = 8 * (mb_xy % (2 * s->mb_stride));
}
init_dequant4_coeff_table(s);
return 0;
}
static void free_picture(AVCodecContext *avctx, SVQ3Frame *pic)
{
int i;
for (i = 0; i < 2; i++) {
av_freep(&pic->motion_val_buf[i]);
}
av_freep(&pic->mb_type_buf);
av_frame_unref(pic->f);
}
static int get_buffer(AVCodecContext *avctx, SVQ3Frame *pic)
{
SVQ3Context *s = avctx->priv_data;
const int big_mb_num = s->mb_stride * (s->mb_height + 1) + 1;
const int b4_stride = s->mb_width * 4 + 1;
const int b4_array_size = b4_stride * s->mb_height * 4;
int ret;
if (!pic->motion_val_buf[0]) {
int i;
pic->mb_type_buf = av_calloc(big_mb_num + s->mb_stride, sizeof(uint32_t));
if (!pic->mb_type_buf)
return AVERROR(ENOMEM);
pic->mb_type = pic->mb_type_buf + 2 * s->mb_stride + 1;
for (i = 0; i < 2; i++) {
pic->motion_val_buf[i] = av_calloc(b4_array_size + 4, 2 * sizeof(int16_t));
if (!pic->motion_val_buf[i]) {
ret = AVERROR(ENOMEM);
goto fail;
}
pic->motion_val[i] = pic->motion_val_buf[i] + 4;
}
}
ret = ff_get_buffer(avctx, pic->f,
(s->pict_type != AV_PICTURE_TYPE_B) ?
AV_GET_BUFFER_FLAG_REF : 0);
if (ret < 0)
goto fail;
if (!s->edge_emu_buffer) {
s->edge_emu_buffer = av_mallocz_array(pic->f->linesize[0], 17);
if (!s->edge_emu_buffer)
return AVERROR(ENOMEM);
}
return 0;
fail:
free_picture(avctx, pic);
return ret;
}
static int svq3_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
SVQ3Context *s = avctx->priv_data;
int buf_size = avpkt->size;
int left;
int ret, m, i;
/* special case for last picture */
if (buf_size == 0) {
if (s->next_pic->f->data[0] && !s->low_delay && !s->last_frame_output) {
ret = av_frame_ref(data, s->next_pic->f);
if (ret < 0)
return ret;
s->last_frame_output = 1;
*got_frame = 1;
}
return 0;
}
s->mb_x = s->mb_y = s->mb_xy = 0;
ret = init_get_bits8(&s->gb, avpkt->data, avpkt->size);
if (ret < 0)
return ret;
if (svq3_decode_slice_header(avctx))
return -1;
s->pict_type = s->slice_type;
if (s->pict_type != AV_PICTURE_TYPE_B)
FFSWAP(SVQ3Frame*, s->next_pic, s->last_pic);
av_frame_unref(s->cur_pic->f);
/* for skipping the frame */
s->cur_pic->f->pict_type = s->pict_type;
s->cur_pic->f->key_frame = (s->pict_type == AV_PICTURE_TYPE_I);
ret = get_buffer(avctx, s->cur_pic);
if (ret < 0)
return ret;
for (i = 0; i < 16; i++) {
s->block_offset[i] = (4 * ((scan8[i] - scan8[0]) & 7)) + 4 * s->cur_pic->f->linesize[0] * ((scan8[i] - scan8[0]) >> 3);
s->block_offset[48 + i] = (4 * ((scan8[i] - scan8[0]) & 7)) + 8 * s->cur_pic->f->linesize[0] * ((scan8[i] - scan8[0]) >> 3);
}
for (i = 0; i < 16; i++) {
s->block_offset[16 + i] =
s->block_offset[32 + i] = (4 * ((scan8[i] - scan8[0]) & 7)) + 4 * s->cur_pic->f->linesize[1] * ((scan8[i] - scan8[0]) >> 3);
s->block_offset[48 + 16 + i] =
s->block_offset[48 + 32 + i] = (4 * ((scan8[i] - scan8[0]) & 7)) + 8 * s->cur_pic->f->linesize[1] * ((scan8[i] - scan8[0]) >> 3);
}
if (s->pict_type != AV_PICTURE_TYPE_I) {
if (!s->last_pic->f->data[0]) {
av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");
av_frame_unref(s->last_pic->f);
ret = get_buffer(avctx, s->last_pic);
if (ret < 0)
return ret;
memset(s->last_pic->f->data[0], 0, avctx->height * s->last_pic->f->linesize[0]);
memset(s->last_pic->f->data[1], 0x80, (avctx->height / 2) *
s->last_pic->f->linesize[1]);
memset(s->last_pic->f->data[2], 0x80, (avctx->height / 2) *
s->last_pic->f->linesize[2]);
}
if (s->pict_type == AV_PICTURE_TYPE_B && !s->next_pic->f->data[0]) {
av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");
av_frame_unref(s->next_pic->f);
ret = get_buffer(avctx, s->next_pic);
if (ret < 0)
return ret;
memset(s->next_pic->f->data[0], 0, avctx->height * s->next_pic->f->linesize[0]);
memset(s->next_pic->f->data[1], 0x80, (avctx->height / 2) *
s->next_pic->f->linesize[1]);
memset(s->next_pic->f->data[2], 0x80, (avctx->height / 2) *
s->next_pic->f->linesize[2]);
}
}
if (avctx->debug & FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_DEBUG,
"%c hpel:%d, tpel:%d aqp:%d qp:%d, slice_num:%02X\n",
av_get_picture_type_char(s->pict_type),
s->halfpel_flag, s->thirdpel_flag,
s->adaptive_quant, s->qscale, s->slice_num);
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 0;
if (s->next_p_frame_damaged) {
if (s->pict_type == AV_PICTURE_TYPE_B)
return 0;
else
s->next_p_frame_damaged = 0;
}
if (s->pict_type == AV_PICTURE_TYPE_B) {
s->frame_num_offset = s->slice_num - s->prev_frame_num;
if (s->frame_num_offset < 0)
s->frame_num_offset += 256;
if (s->frame_num_offset == 0 ||
s->frame_num_offset >= s->prev_frame_num_offset) {
av_log(s->avctx, AV_LOG_ERROR, "error in B-frame picture id\n");
return -1;
}
} else {
s->prev_frame_num = s->frame_num;
s->frame_num = s->slice_num;
s->prev_frame_num_offset = s->frame_num - s->prev_frame_num;
if (s->prev_frame_num_offset < 0)
s->prev_frame_num_offset += 256;
}
for (m = 0; m < 2; m++) {
int i;
for (i = 0; i < 4; i++) {
int j;
for (j = -1; j < 4; j++)
s->ref_cache[m][scan8[0] + 8 * i + j] = 1;
if (i < 3)
s->ref_cache[m][scan8[0] + 8 * i + j] = PART_NOT_AVAILABLE;
}
}
for (s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
for (s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
unsigned mb_type;
s->mb_xy = s->mb_x + s->mb_y * s->mb_stride;
if ((get_bits_left(&s->gb_slice)) <= 7) {
if (((get_bits_count(&s->gb_slice) & 7) == 0 ||
show_bits(&s->gb_slice, get_bits_left(&s->gb_slice) & 7) == 0)) {
if (svq3_decode_slice_header(avctx))
return -1;
}
if (s->slice_type != s->pict_type) {
avpriv_request_sample(avctx, "non constant slice type");
}
/* TODO: support s->mb_skip_run */
}
mb_type = get_interleaved_ue_golomb(&s->gb_slice);
if (s->pict_type == AV_PICTURE_TYPE_I)
mb_type += 8;
else if (s->pict_type == AV_PICTURE_TYPE_B && mb_type >= 4)
mb_type += 4;
if (mb_type > 33 || svq3_decode_mb(s, mb_type)) {
av_log(s->avctx, AV_LOG_ERROR,
"error while decoding MB %d %d\n", s->mb_x, s->mb_y);
return -1;
}
if (mb_type != 0 || s->cbp)
hl_decode_mb(s);
if (s->pict_type != AV_PICTURE_TYPE_B && !s->low_delay)
s->cur_pic->mb_type[s->mb_x + s->mb_y * s->mb_stride] =
(s->pict_type == AV_PICTURE_TYPE_P && mb_type < 8) ? (mb_type - 1) : -1;
}
ff_draw_horiz_band(avctx, s->cur_pic->f,
s->last_pic->f->data[0] ? s->last_pic->f : NULL,
16 * s->mb_y, 16, PICT_FRAME, 0,
s->low_delay);
}
left = buf_size*8 - get_bits_count(&s->gb_slice);
if (s->mb_y != s->mb_height || s->mb_x != s->mb_width) {
av_log(avctx, AV_LOG_INFO, "frame num %d incomplete pic x %d y %d left %d\n", avctx->frame_number, s->mb_y, s->mb_x, left);
//av_hex_dump(stderr, buf+buf_size-8, 8);
}
if (left < 0) {
av_log(avctx, AV_LOG_ERROR, "frame num %d left %d\n", avctx->frame_number, left);
return -1;
}
if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay)
ret = av_frame_ref(data, s->cur_pic->f);
else if (s->last_pic->f->data[0])
ret = av_frame_ref(data, s->last_pic->f);
if (ret < 0)
return ret;
/* Do not output the last pic after seeking. */
if (s->last_pic->f->data[0] || s->low_delay)
*got_frame = 1;
if (s->pict_type != AV_PICTURE_TYPE_B) {
FFSWAP(SVQ3Frame*, s->cur_pic, s->next_pic);
} else {
av_frame_unref(s->cur_pic->f);
}
return buf_size;
}
static av_cold int svq3_decode_end(AVCodecContext *avctx)
{
SVQ3Context *s = avctx->priv_data;
free_picture(avctx, s->cur_pic);
free_picture(avctx, s->next_pic);
free_picture(avctx, s->last_pic);
av_frame_free(&s->cur_pic->f);
av_frame_free(&s->next_pic->f);
av_frame_free(&s->last_pic->f);
av_freep(&s->slice_buf);
av_freep(&s->intra4x4_pred_mode);
av_freep(&s->edge_emu_buffer);
av_freep(&s->mb2br_xy);
return 0;
}
AVCodec ff_svq3_decoder = {
.name = "svq3",
.long_name = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 3 / Sorenson Video 3 / SVQ3"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_SVQ3,
.priv_data_size = sizeof(SVQ3Context),
.init = svq3_decode_init,
.close = svq3_decode_end,
.decode = svq3_decode_frame,
.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND |
AV_CODEC_CAP_DR1 |
AV_CODEC_CAP_DELAY,
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_NONE},
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
};
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