mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-03 16:09:39 +00:00
68c4019057
Set parameters so that we don't crash with libjpeg7. Based on Stefan Kost's fix for jpegenc. Fixes #591951.
709 lines
17 KiB
C
709 lines
17 KiB
C
/* Smoke codec
|
|
* Copyright (C) <2004> Wim Taymans <wim@fluendo.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
|
|
/* this is a hack hack hack to get around jpeglib header bugs... */
|
|
#ifdef HAVE_STDLIB_H
|
|
# undef HAVE_STDLIB_H
|
|
#endif
|
|
#include <jpeglib.h>
|
|
|
|
#include "smokecodec.h"
|
|
#include "smokeformat.h"
|
|
|
|
#include <gst/gstinfo.h>
|
|
|
|
struct _SmokeCodecInfo
|
|
{
|
|
unsigned int width;
|
|
unsigned int height;
|
|
unsigned int fps_num;
|
|
unsigned int fps_denom;
|
|
|
|
unsigned int minquality;
|
|
unsigned int maxquality;
|
|
unsigned int bitrate;
|
|
unsigned int threshold;
|
|
|
|
unsigned int refdec;
|
|
|
|
unsigned char **line[3];
|
|
unsigned char *compbuf[3];
|
|
|
|
struct jpeg_error_mgr jerr;
|
|
|
|
struct jpeg_compress_struct cinfo;
|
|
struct jpeg_destination_mgr jdest;
|
|
|
|
struct jpeg_decompress_struct dinfo;
|
|
struct jpeg_source_mgr jsrc;
|
|
|
|
int need_keyframe;
|
|
unsigned char *reference;
|
|
};
|
|
|
|
static void
|
|
smokecodec_init_destination (j_compress_ptr cinfo)
|
|
{
|
|
}
|
|
|
|
static boolean
|
|
smokecodec_flush_destination (j_compress_ptr cinfo)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
smokecodec_term_destination (j_compress_ptr cinfo)
|
|
{
|
|
}
|
|
|
|
static void
|
|
smokecodec_init_source (j_decompress_ptr cinfo)
|
|
{
|
|
}
|
|
|
|
static boolean
|
|
smokecodec_fill_input_buffer (j_decompress_ptr cinfo)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
smokecodec_skip_input_data (j_decompress_ptr cinfo, long num_bytes)
|
|
{
|
|
}
|
|
|
|
static boolean
|
|
smokecodec_resync_to_restart (j_decompress_ptr cinfo, int desired)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
smokecodec_term_source (j_decompress_ptr cinfo)
|
|
{
|
|
}
|
|
|
|
|
|
int
|
|
smokecodec_encode_new (SmokeCodecInfo ** info,
|
|
const unsigned int width,
|
|
const unsigned int height,
|
|
const unsigned int fps_num, const unsigned int fps_denom)
|
|
{
|
|
SmokeCodecInfo *newinfo;
|
|
int i, j;
|
|
unsigned char *base[3];
|
|
|
|
if (!info)
|
|
return SMOKECODEC_NULLPTR;
|
|
if ((width & 0xf) || (height & 0xf))
|
|
return SMOKECODEC_WRONGSIZE;
|
|
|
|
newinfo = malloc (sizeof (SmokeCodecInfo));
|
|
if (!newinfo) {
|
|
return SMOKECODEC_NOMEM;
|
|
}
|
|
newinfo->width = width;
|
|
newinfo->height = height;
|
|
newinfo->fps_num = fps_num;
|
|
newinfo->fps_denom = fps_denom;
|
|
|
|
/* setup jpeglib */
|
|
memset (&newinfo->cinfo, 0, sizeof (newinfo->cinfo));
|
|
memset (&newinfo->jerr, 0, sizeof (newinfo->jerr));
|
|
newinfo->cinfo.err = jpeg_std_error (&newinfo->jerr);
|
|
jpeg_create_compress (&newinfo->cinfo);
|
|
newinfo->cinfo.input_components = 3;
|
|
jpeg_set_defaults (&newinfo->cinfo);
|
|
|
|
newinfo->cinfo.dct_method = JDCT_FASTEST;
|
|
|
|
/* prepare for raw input */
|
|
#if JPEG_LIB_VERSION >= 70
|
|
newinfo->cinfo.do_fancy_downsampling = FALSE;
|
|
#endif
|
|
|
|
newinfo->cinfo.raw_data_in = TRUE;
|
|
newinfo->cinfo.in_color_space = JCS_YCbCr;
|
|
newinfo->cinfo.comp_info[0].h_samp_factor = 2;
|
|
newinfo->cinfo.comp_info[0].v_samp_factor = 2;
|
|
newinfo->cinfo.comp_info[1].h_samp_factor = 1;
|
|
newinfo->cinfo.comp_info[1].v_samp_factor = 1;
|
|
newinfo->cinfo.comp_info[2].h_samp_factor = 1;
|
|
newinfo->cinfo.comp_info[2].v_samp_factor = 1;
|
|
|
|
newinfo->line[0] = malloc (DCTSIZE * 2 * sizeof (char *));
|
|
newinfo->line[1] = malloc (DCTSIZE * sizeof (char *));
|
|
newinfo->line[2] = malloc (DCTSIZE * sizeof (char *));
|
|
base[0] = newinfo->compbuf[0] = malloc (256 * 2 * DCTSIZE * 2 * DCTSIZE);
|
|
base[1] = newinfo->compbuf[1] = malloc (256 * DCTSIZE * DCTSIZE);
|
|
base[2] = newinfo->compbuf[2] = malloc (256 * DCTSIZE * DCTSIZE);
|
|
|
|
for (i = 0, j = 0; i < 2 * DCTSIZE; i += 2, j++) {
|
|
newinfo->line[0][i] = base[0];
|
|
base[0] += 2 * DCTSIZE * 256;
|
|
newinfo->line[0][i + 1] = base[0];
|
|
base[0] += 2 * DCTSIZE * 256;
|
|
newinfo->line[1][j] = base[1];
|
|
base[1] += DCTSIZE * 256;
|
|
newinfo->line[2][j] = base[2];
|
|
base[2] += DCTSIZE * 256;
|
|
}
|
|
|
|
newinfo->jdest.init_destination = smokecodec_init_destination;
|
|
newinfo->jdest.empty_output_buffer = smokecodec_flush_destination;
|
|
newinfo->jdest.term_destination = smokecodec_term_destination;
|
|
newinfo->cinfo.dest = &newinfo->jdest;
|
|
|
|
jpeg_suppress_tables (&newinfo->cinfo, FALSE);
|
|
|
|
memset (&newinfo->dinfo, 0, sizeof (newinfo->dinfo));
|
|
newinfo->dinfo.err = jpeg_std_error (&newinfo->jerr);
|
|
jpeg_create_decompress (&newinfo->dinfo);
|
|
|
|
newinfo->jsrc.init_source = smokecodec_init_source;
|
|
newinfo->jsrc.fill_input_buffer = smokecodec_fill_input_buffer;
|
|
newinfo->jsrc.skip_input_data = smokecodec_skip_input_data;
|
|
newinfo->jsrc.resync_to_restart = smokecodec_resync_to_restart;
|
|
newinfo->jsrc.term_source = smokecodec_term_source;
|
|
newinfo->dinfo.src = &newinfo->jsrc;
|
|
|
|
newinfo->need_keyframe = 1;
|
|
newinfo->threshold = 4000;
|
|
newinfo->minquality = 10;
|
|
newinfo->maxquality = 85;
|
|
newinfo->reference = malloc (3 * (width * height) / 2);
|
|
newinfo->refdec = 0;
|
|
|
|
*info = newinfo;
|
|
|
|
return SMOKECODEC_OK;
|
|
}
|
|
|
|
int
|
|
smokecodec_decode_new (SmokeCodecInfo ** info)
|
|
{
|
|
return smokecodec_encode_new (info, 16, 16, 1, 1);
|
|
}
|
|
|
|
int
|
|
smokecodec_info_free (SmokeCodecInfo * info)
|
|
{
|
|
free (info->line[0]);
|
|
free (info->line[1]);
|
|
free (info->line[2]);
|
|
free (info->compbuf[0]);
|
|
free (info->compbuf[1]);
|
|
free (info->compbuf[2]);
|
|
free (info->reference);
|
|
jpeg_destroy_compress (&info->cinfo);
|
|
jpeg_destroy_decompress (&info->dinfo);
|
|
free (info);
|
|
|
|
return SMOKECODEC_OK;
|
|
}
|
|
|
|
SmokeCodecResult
|
|
smokecodec_set_quality (SmokeCodecInfo * info,
|
|
const unsigned int min, const unsigned int max)
|
|
{
|
|
info->minquality = min;
|
|
info->maxquality = max;
|
|
|
|
return SMOKECODEC_OK;
|
|
}
|
|
|
|
SmokeCodecResult
|
|
smokecodec_get_quality (SmokeCodecInfo * info,
|
|
unsigned int *min, unsigned int *max)
|
|
{
|
|
*min = info->minquality;
|
|
*max = info->maxquality;
|
|
|
|
return SMOKECODEC_OK;
|
|
}
|
|
|
|
SmokeCodecResult
|
|
smokecodec_set_threshold (SmokeCodecInfo * info, const unsigned int threshold)
|
|
{
|
|
info->threshold = threshold;
|
|
|
|
return SMOKECODEC_OK;
|
|
}
|
|
|
|
SmokeCodecResult
|
|
smokecodec_get_threshold (SmokeCodecInfo * info, unsigned int *threshold)
|
|
{
|
|
*threshold = info->threshold;
|
|
|
|
return SMOKECODEC_OK;
|
|
}
|
|
|
|
SmokeCodecResult
|
|
smokecodec_set_bitrate (SmokeCodecInfo * info, const unsigned int bitrate)
|
|
{
|
|
info->bitrate = bitrate;
|
|
|
|
return SMOKECODEC_OK;
|
|
}
|
|
|
|
SmokeCodecResult
|
|
smokecodec_get_bitrate (SmokeCodecInfo * info, unsigned int *bitrate)
|
|
{
|
|
*bitrate = info->bitrate;
|
|
|
|
return SMOKECODEC_OK;
|
|
}
|
|
|
|
static void
|
|
find_best_size (int blocks, unsigned int *width, unsigned int *height)
|
|
{
|
|
int sqchng;
|
|
int w, h;
|
|
int best, bestw;
|
|
int free;
|
|
|
|
sqchng = ceil (sqrt (blocks));
|
|
w = sqchng;
|
|
h = sqchng;
|
|
|
|
GST_DEBUG ("guess: %d %d", w, h);
|
|
|
|
free = w * h - blocks;
|
|
best = free;
|
|
bestw = w;
|
|
|
|
while (w < 256) {
|
|
GST_DEBUG ("current: %d %d", w, h);
|
|
if (free < best) {
|
|
best = free;
|
|
bestw = w;
|
|
if (free == 0)
|
|
break;
|
|
}
|
|
// if we cannot reduce the height, increase width
|
|
if (free < w) {
|
|
w++;
|
|
free += h;
|
|
}
|
|
// reduce height while possible
|
|
while (free >= w) {
|
|
h--;
|
|
free -= w;
|
|
}
|
|
}
|
|
*width = bestw;
|
|
*height = (blocks + best) / bestw;
|
|
}
|
|
|
|
static int
|
|
abs_diff (const unsigned char *in1, const unsigned char *in2, const int stride)
|
|
{
|
|
int s;
|
|
int i, j, diff;
|
|
|
|
s = 0;
|
|
|
|
for (i = 0; i < 2 * DCTSIZE; i++) {
|
|
for (j = 0; j < 2 * DCTSIZE; j++) {
|
|
diff = in1[j] - in2[j];
|
|
s += diff * diff;
|
|
}
|
|
in1 += stride;
|
|
in2 += stride;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
static void
|
|
put (const unsigned char *src, unsigned char *dest,
|
|
int width, int height, int srcstride, int deststride)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < height; i++) {
|
|
for (j = 0; j < width; j++) {
|
|
dest[j] = src[j];
|
|
}
|
|
src += srcstride;
|
|
dest += deststride;
|
|
}
|
|
}
|
|
|
|
/* encoding */
|
|
SmokeCodecResult
|
|
smokecodec_encode_id (SmokeCodecInfo * info,
|
|
unsigned char *out, unsigned int *outsize)
|
|
{
|
|
int i;
|
|
|
|
*out++ = SMOKECODEC_TYPE_ID;
|
|
for (i = 0; i < strlen (SMOKECODEC_ID_STRING); i++) {
|
|
*out++ = SMOKECODEC_ID_STRING[i];
|
|
}
|
|
*out++ = 0;
|
|
*out++ = 1;
|
|
*out++ = 0;
|
|
|
|
*outsize = 9;
|
|
|
|
return SMOKECODEC_OK;
|
|
}
|
|
|
|
SmokeCodecResult
|
|
smokecodec_encode (SmokeCodecInfo * info,
|
|
const unsigned char *in,
|
|
SmokeCodecFlags flags, unsigned char *out, unsigned int *outsize)
|
|
{
|
|
unsigned int i, j, s;
|
|
const unsigned char *ip;
|
|
unsigned char *op;
|
|
unsigned int blocks, encoding;
|
|
unsigned int size;
|
|
unsigned int width, height;
|
|
unsigned int blocks_w, blocks_h;
|
|
unsigned int threshold;
|
|
unsigned int max;
|
|
|
|
if (info->need_keyframe) {
|
|
flags |= SMOKECODEC_KEYFRAME;
|
|
info->need_keyframe = 0;
|
|
}
|
|
|
|
if (flags & SMOKECODEC_KEYFRAME)
|
|
threshold = 0;
|
|
else
|
|
threshold = info->threshold;
|
|
|
|
ip = in;
|
|
op = info->reference;
|
|
|
|
width = info->width;
|
|
height = info->height;
|
|
|
|
blocks_w = width / (DCTSIZE * 2);
|
|
blocks_h = height / (DCTSIZE * 2);
|
|
|
|
max = blocks_w * blocks_h;
|
|
|
|
out[IDX_TYPE] = SMOKECODEC_TYPE_DATA;
|
|
|
|
#define STORE16(var, pos, x) \
|
|
var[pos] = (x >> 8); \
|
|
var[pos+1] = (x & 0xff);
|
|
#define STORE32(var, pos, x) \
|
|
var[pos] = ((x >> 24) & 0xff); \
|
|
var[pos+1] = ((x >> 16) & 0xff); \
|
|
var[pos+2] = ((x >> 8) & 0xff); \
|
|
var[pos+3] = (x & 0xff);
|
|
|
|
/* write dimension */
|
|
STORE16 (out, IDX_WIDTH, width);
|
|
STORE16 (out, IDX_HEIGHT, height);
|
|
|
|
/* write framerate */
|
|
STORE32 (out, IDX_FPS_NUM, info->fps_num);
|
|
STORE32 (out, IDX_FPS_DENOM, info->fps_denom);
|
|
|
|
if (!(flags & SMOKECODEC_KEYFRAME)) {
|
|
int block = 0;
|
|
|
|
blocks = 0;
|
|
for (i = 0; i < height; i += 2 * DCTSIZE) {
|
|
for (j = 0; j < width; j += 2 * DCTSIZE) {
|
|
s = abs_diff (ip, op, width);
|
|
if (s >= threshold) {
|
|
STORE16 (out, blocks * 2 + IDX_BLOCKS, block);
|
|
blocks++;
|
|
}
|
|
|
|
ip += 2 * DCTSIZE;
|
|
op += 2 * DCTSIZE;
|
|
block++;
|
|
}
|
|
ip += (2 * DCTSIZE - 1) * width;
|
|
op += (2 * DCTSIZE - 1) * width;
|
|
}
|
|
if (blocks == max) {
|
|
flags |= SMOKECODEC_KEYFRAME;
|
|
blocks = 0;
|
|
encoding = max;
|
|
} else {
|
|
encoding = blocks;
|
|
}
|
|
} else {
|
|
blocks = 0;
|
|
encoding = max;
|
|
}
|
|
STORE16 (out, IDX_NUM_BLOCKS, blocks);
|
|
out[IDX_FLAGS] = (flags & 0xff);
|
|
|
|
GST_DEBUG ("blocks %d, encoding %d", blocks, encoding);
|
|
|
|
info->jdest.next_output_byte = &out[blocks * 2 + OFFS_PICT];
|
|
info->jdest.free_in_buffer = (*outsize) - OFFS_PICT;
|
|
|
|
if (encoding > 0) {
|
|
int quality;
|
|
|
|
if (!(flags & SMOKECODEC_KEYFRAME))
|
|
find_best_size (encoding, &blocks_w, &blocks_h);
|
|
|
|
GST_DEBUG ("best: %d %d", blocks_w, blocks_h);
|
|
|
|
info->cinfo.image_width = blocks_w * DCTSIZE * 2;
|
|
info->cinfo.image_height = blocks_h * DCTSIZE * 2;
|
|
|
|
if (flags & SMOKECODEC_KEYFRAME) {
|
|
quality = (info->maxquality * 60) / 100;
|
|
} else {
|
|
quality =
|
|
info->maxquality - ((info->maxquality -
|
|
info->minquality) * blocks) / max;
|
|
}
|
|
|
|
GST_DEBUG ("set q %d %d %d", quality, encoding, max);
|
|
jpeg_set_quality (&info->cinfo, quality, TRUE);
|
|
GST_DEBUG ("start");
|
|
jpeg_start_compress (&info->cinfo, TRUE);
|
|
|
|
for (i = 0; i < encoding; i++) {
|
|
int pos;
|
|
int x, y;
|
|
|
|
if (flags & SMOKECODEC_KEYFRAME)
|
|
pos = i;
|
|
else
|
|
pos = (out[i * 2 + IDX_BLOCKS] << 8) | (out[i * 2 + IDX_BLOCKS + 1]);
|
|
|
|
x = pos % (width / (DCTSIZE * 2));
|
|
y = pos / (width / (DCTSIZE * 2));
|
|
|
|
ip = in + (x * (DCTSIZE * 2)) + (y * (DCTSIZE * 2) * width);
|
|
op = info->compbuf[0] + (i % blocks_w) * (DCTSIZE * 2);
|
|
put (ip, op, 2 * DCTSIZE, 2 * DCTSIZE, width, 256 * (DCTSIZE * 2));
|
|
|
|
ip = in + width * height + (x * DCTSIZE) + (y * DCTSIZE * width / 2);
|
|
op = info->compbuf[1] + (i % blocks_w) * (DCTSIZE);
|
|
put (ip, op, DCTSIZE, DCTSIZE, width / 2, 256 * DCTSIZE);
|
|
|
|
ip = in + 5 * (width * height) / 4 + (x * DCTSIZE) +
|
|
(y * DCTSIZE * width / 2);
|
|
op = info->compbuf[2] + (i % blocks_w) * (DCTSIZE);
|
|
put (ip, op, DCTSIZE, DCTSIZE, width / 2, 256 * DCTSIZE);
|
|
|
|
if ((i % blocks_w) == (blocks_w - 1) || (i == encoding - 1)) {
|
|
GST_DEBUG ("write %d", pos);
|
|
jpeg_write_raw_data (&info->cinfo, info->line, 2 * DCTSIZE);
|
|
}
|
|
}
|
|
GST_DEBUG ("finish");
|
|
jpeg_finish_compress (&info->cinfo);
|
|
}
|
|
|
|
size = ((((*outsize) - OFFS_PICT - info->jdest.free_in_buffer) + 3) & ~3);
|
|
STORE16 (out, IDX_SIZE, size);
|
|
|
|
*outsize = size + blocks * 2 + OFFS_PICT;
|
|
GST_DEBUG ("outsize %d", *outsize);
|
|
|
|
// and decode in reference frame again
|
|
if (info->refdec) {
|
|
smokecodec_decode (info, out, *outsize, info->reference);
|
|
} else {
|
|
memcpy (info->reference, in, 3 * (width * height) / 2);
|
|
}
|
|
|
|
return SMOKECODEC_OK;
|
|
}
|
|
|
|
SmokeCodecResult
|
|
smokecodec_parse_id (SmokeCodecInfo * info,
|
|
const unsigned char *in, const unsigned int insize)
|
|
{
|
|
int i;
|
|
|
|
if (insize < 4 + strlen (SMOKECODEC_ID_STRING)) {
|
|
return SMOKECODEC_WRONGVERSION;
|
|
}
|
|
|
|
if (*in++ != SMOKECODEC_TYPE_ID)
|
|
return SMOKECODEC_ERROR;
|
|
|
|
for (i = 0; i < strlen (SMOKECODEC_ID_STRING); i++) {
|
|
if (*in++ != SMOKECODEC_ID_STRING[i])
|
|
return SMOKECODEC_ERROR;
|
|
}
|
|
if (*in++ != 0 || *in++ != 1 || *in++ != 0)
|
|
return SMOKECODEC_ERROR;
|
|
|
|
return SMOKECODEC_OK;
|
|
}
|
|
|
|
#define READ16(var, pos, x) \
|
|
x = var[pos]<<8 | var[pos+1];
|
|
|
|
#define READ32(var, pos, x) \
|
|
x = var[pos]<<24 | var[pos+1]<<16 | \
|
|
var[pos+2]<<8 | var[pos+3];
|
|
|
|
/* decoding */
|
|
SmokeCodecResult
|
|
smokecodec_parse_header (SmokeCodecInfo * info,
|
|
const unsigned char *in,
|
|
const unsigned int insize,
|
|
SmokeCodecFlags * flags,
|
|
unsigned int *width,
|
|
unsigned int *height, unsigned int *fps_num, unsigned int *fps_denom)
|
|
{
|
|
|
|
READ16 (in, IDX_WIDTH, *width);
|
|
READ16 (in, IDX_HEIGHT, *height);
|
|
*flags = in[IDX_FLAGS];
|
|
READ32 (in, IDX_FPS_NUM, *fps_num);
|
|
READ32 (in, IDX_FPS_DENOM, *fps_denom);
|
|
|
|
if (info->width != *width ||
|
|
info->height != *height ||
|
|
info->fps_num != *fps_num || info->fps_denom != *fps_denom) {
|
|
GST_DEBUG ("new width: %d %d", *width, *height);
|
|
|
|
info->reference = realloc (info->reference, 3 * ((*width) * (*height)) / 2);
|
|
info->width = *width;
|
|
info->height = *height;
|
|
info->fps_num = *fps_num;
|
|
info->fps_denom = *fps_denom;
|
|
}
|
|
|
|
return SMOKECODEC_OK;
|
|
}
|
|
|
|
SmokeCodecResult
|
|
smokecodec_decode (SmokeCodecInfo * info,
|
|
const unsigned char *in, const unsigned int insize, unsigned char *out)
|
|
{
|
|
unsigned int width, height;
|
|
unsigned int fps_num, fps_denom;
|
|
SmokeCodecFlags flags;
|
|
int i, j;
|
|
int blocks_w, blocks_h;
|
|
int blockptr;
|
|
int blocks, decoding;
|
|
const unsigned char *ip;
|
|
unsigned char *op;
|
|
int res;
|
|
|
|
smokecodec_parse_header (info, in, insize, &flags, &width, &height,
|
|
&fps_num, &fps_denom);
|
|
|
|
READ16 (in, IDX_NUM_BLOCKS, blocks);
|
|
GST_DEBUG ("blocks %d", blocks);
|
|
|
|
if (flags & SMOKECODEC_KEYFRAME)
|
|
decoding = width / (DCTSIZE * 2) * height / (DCTSIZE * 2);
|
|
else
|
|
decoding = blocks;
|
|
|
|
if (decoding > 0) {
|
|
info->jsrc.next_input_byte = &in[blocks * 2 + OFFS_PICT];
|
|
info->jsrc.bytes_in_buffer = insize - (blocks * 2 + OFFS_PICT);
|
|
|
|
GST_DEBUG ("header %02x %d", in[blocks * 2 + OFFS_PICT], insize);
|
|
res = jpeg_read_header (&info->dinfo, TRUE);
|
|
GST_DEBUG ("header %d %d %d", res, info->dinfo.image_width,
|
|
info->dinfo.image_height);
|
|
|
|
blocks_w = info->dinfo.image_width / (2 * DCTSIZE);
|
|
blocks_h = info->dinfo.image_height / (2 * DCTSIZE);
|
|
|
|
info->dinfo.output_width = info->dinfo.image_width;
|
|
info->dinfo.output_height = info->dinfo.image_height;
|
|
|
|
GST_DEBUG ("start");
|
|
info->dinfo.do_fancy_upsampling = FALSE;
|
|
info->dinfo.do_block_smoothing = FALSE;
|
|
info->dinfo.out_color_space = JCS_YCbCr;
|
|
info->dinfo.dct_method = JDCT_IFAST;
|
|
info->dinfo.raw_data_out = TRUE;
|
|
jpeg_start_decompress (&info->dinfo);
|
|
|
|
blockptr = 0;
|
|
|
|
for (i = 0; i < blocks_h; i++) {
|
|
GST_DEBUG ("read");
|
|
jpeg_read_raw_data (&info->dinfo, info->line, 2 * DCTSIZE);
|
|
|
|
GST_DEBUG ("copy %d", blocks_w);
|
|
for (j = 0; j < blocks_w; j++) {
|
|
int pos;
|
|
int x, y;
|
|
|
|
if (flags & SMOKECODEC_KEYFRAME)
|
|
pos = blockptr;
|
|
else
|
|
READ16 (in, blockptr * 2 + IDX_BLOCKS, pos);
|
|
|
|
x = pos % (width / (DCTSIZE * 2));
|
|
y = pos / (width / (DCTSIZE * 2));
|
|
|
|
GST_DEBUG ("block %d %d %d", pos, x, y);
|
|
|
|
ip = info->compbuf[0] + j * (DCTSIZE * 2);
|
|
op = info->reference + (x * (DCTSIZE * 2)) +
|
|
(y * (DCTSIZE * 2) * width);
|
|
put (ip, op, 2 * DCTSIZE, 2 * DCTSIZE, 256 * (DCTSIZE * 2), width);
|
|
|
|
ip = info->compbuf[1] + j * (DCTSIZE);
|
|
op = info->reference + width * height + (x * DCTSIZE) +
|
|
(y * DCTSIZE * width / 2);
|
|
put (ip, op, DCTSIZE, DCTSIZE, 256 * DCTSIZE, width / 2);
|
|
|
|
ip = info->compbuf[2] + j * (DCTSIZE);
|
|
op = info->reference + 5 * (width * height) / 4 + (x * DCTSIZE) +
|
|
(y * DCTSIZE * width / 2);
|
|
put (ip, op, DCTSIZE, DCTSIZE, 256 * DCTSIZE, width / 2);
|
|
|
|
GST_DEBUG ("block done %d %d %d", pos, x, y);
|
|
blockptr++;
|
|
if (blockptr >= decoding)
|
|
break;
|
|
}
|
|
}
|
|
GST_DEBUG ("finish");
|
|
jpeg_finish_decompress (&info->dinfo);
|
|
}
|
|
|
|
GST_DEBUG ("copy");
|
|
if (out != info->reference)
|
|
memcpy (out, info->reference, 3 * (width * height) / 2);
|
|
GST_DEBUG ("copy done");
|
|
|
|
return SMOKECODEC_OK;
|
|
}
|