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Pillow/libImaging/Jpeg2KEncode.c
Andrew Murray 572a3d970c Removed whitespace from blank lines
2016-09-03 12:23:42 +10:00

631 lines
18 KiB
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/*
* The Python Imaging Library.
* $Id$
*
* decoder for JPEG2000 image data.
*
* history:
* 2014-03-12 ajh Created
*
* Copyright (c) 2014 Coriolis Systems Limited
* Copyright (c) 2014 Alastair Houghton
*
* See the README file for details on usage and redistribution.
*/
#include "Imaging.h"
#ifdef HAVE_OPENJPEG
#include "Jpeg2K.h"
#define CINEMA_24_CS_LENGTH 1302083
#define CINEMA_48_CS_LENGTH 651041
#define COMP_24_CS_MAX_LENGTH 1041666
#define COMP_48_CS_MAX_LENGTH 520833
/* -------------------------------------------------------------------- */
/* Error handler */
/* -------------------------------------------------------------------- */
static void
j2k_error(const char *msg, void *client_data)
{
JPEG2KENCODESTATE *state = (JPEG2KENCODESTATE *) client_data;
free((void *)state->error_msg);
state->error_msg = strdup(msg);
}
static void
j2k_warn(const char *msg, void *client_data)
{
// Null handler
}
/* -------------------------------------------------------------------- */
/* Buffer output stream */
/* -------------------------------------------------------------------- */
static OPJ_SIZE_T
j2k_write(void *p_buffer, OPJ_SIZE_T p_nb_bytes, void *p_user_data)
{
ImagingCodecState state = (ImagingCodecState)p_user_data;
int result;
result = _imaging_write_pyFd(state->fd, p_buffer, p_nb_bytes);
return result ? result : (OPJ_SIZE_T)-1;
}
static OPJ_OFF_T
j2k_skip(OPJ_OFF_T p_nb_bytes, void *p_user_data)
{
ImagingCodecState state = (ImagingCodecState)p_user_data;
char *buffer;
int result;
/* Explicitly write zeros */
buffer = calloc(p_nb_bytes,1);
if (!buffer) {
return (OPJ_OFF_T)-1;
}
result = _imaging_write_pyFd(state->fd, buffer, p_nb_bytes);
free(buffer);
return result ? result : p_nb_bytes;
}
static OPJ_BOOL
j2k_seek(OPJ_OFF_T p_nb_bytes, void *p_user_data)
{
ImagingCodecState state = (ImagingCodecState)p_user_data;
off_t pos = 0;
_imaging_seek_pyFd(state->fd, p_nb_bytes, SEEK_SET);
pos = _imaging_tell_pyFd(state->fd);
return pos == p_nb_bytes;
}
/* -------------------------------------------------------------------- */
/* Encoder */
/* -------------------------------------------------------------------- */
typedef void (*j2k_pack_tile_t)(Imaging im, UINT8 *buf,
unsigned x0, unsigned y0,
unsigned w, unsigned h);
static void
j2k_pack_l(Imaging im, UINT8 *buf,
unsigned x0, unsigned y0, unsigned w, unsigned h)
{
UINT8 *ptr = buf;
unsigned x,y;
for (y = 0; y < h; ++y) {
UINT8 *data = (UINT8 *)(im->image[y + y0] + x0);
for (x = 0; x < w; ++x)
*ptr++ = *data++;
}
}
static void
j2k_pack_i16(Imaging im, UINT8 *buf,
unsigned x0, unsigned y0, unsigned w, unsigned h)
{
UINT8 *ptr = buf;
unsigned x,y;
for (y = 0; y < h; ++y) {
UINT8 *data = (UINT8 *)(im->image[y + y0] + x0);
for (x = 0; x < w; ++x) {
*ptr++ = *data++;
*ptr++ = *data++;
}
}
}
static void
j2k_pack_la(Imaging im, UINT8 *buf,
unsigned x0, unsigned y0, unsigned w, unsigned h)
{
UINT8 *ptr = buf;
UINT8 *ptra = buf + w * h;
unsigned x,y;
for (y = 0; y < h; ++y) {
UINT8 *data = (UINT8 *)(im->image[y + y0] + 4 * x0);
for (x = 0; x < w; ++x) {
*ptr++ = data[0];
*ptra++ = data[3];
data += 4;
}
}
}
static void
j2k_pack_rgb(Imaging im, UINT8 *buf,
unsigned x0, unsigned y0, unsigned w, unsigned h)
{
UINT8 *pr = buf;
UINT8 *pg = pr + w * h;
UINT8 *pb = pg + w * h;
unsigned x,y;
for (y = 0; y < h; ++y) {
UINT8 *data = (UINT8 *)(im->image[y + y0] + 4 * x0);
for (x = 0; x < w; ++x) {
*pr++ = data[0];
*pg++ = data[1];
*pb++ = data[2];
data += 4;
}
}
}
static void
j2k_pack_rgba(Imaging im, UINT8 *buf,
unsigned x0, unsigned y0, unsigned w, unsigned h)
{
UINT8 *pr = buf;
UINT8 *pg = pr + w * h;
UINT8 *pb = pg + w * h;
UINT8 *pa = pb + w * h;
unsigned x,y;
for (y = 0; y < h; ++y) {
UINT8 *data = (UINT8 *)(im->image[y + y0] + 4 * x0);
for (x = 0; x < w; ++x) {
*pr++ = *data++;
*pg++ = *data++;
*pb++ = *data++;
*pa++ = *data++;
}
}
}
enum {
J2K_STATE_START = 0,
J2K_STATE_ENCODING = 1,
J2K_STATE_DONE = 2,
J2K_STATE_FAILED = 3,
};
static void
j2k_set_cinema_params(Imaging im, int components, opj_cparameters_t *params)
{
float rate;
unsigned n;
/* These settings have been copied from opj_compress in the OpenJPEG
sources. */
params->tile_size_on = OPJ_FALSE;
params->cp_tdx = params->cp_tdy = 1;
params->tp_flag = 'C';
params->tp_on = 1;
params->cp_tx0 = params->cp_ty0 = 0;
params->image_offset_x0 = params->image_offset_y0 = 0;
params->cblockw_init = 32;
params->cblockh_init = 32;
params->csty |= 0x01;
params->prog_order = OPJ_CPRL;
params->roi_compno = -1;
params->subsampling_dx = params->subsampling_dy = 1;
params->irreversible = 1;
if (params->cp_cinema == OPJ_CINEMA4K_24) {
float max_rate = ((float)(components * im->xsize * im->ysize * 8)
/ (CINEMA_24_CS_LENGTH * 8));
params->POC[0].tile = 1;
params->POC[0].resno0 = 0;
params->POC[0].compno0 = 0;
params->POC[0].layno1 = 1;
params->POC[0].resno1 = params->numresolution - 1;
params->POC[0].compno1 = 3;
params->POC[0].prg1 = OPJ_CPRL;
params->POC[1].tile = 1;
params->POC[1].resno0 = 0;
params->POC[1].compno0 = 0;
params->POC[1].layno1 = 1;
params->POC[1].resno1 = params->numresolution - 1;
params->POC[1].compno1 = 3;
params->POC[1].prg1 = OPJ_CPRL;
params->numpocs = 2;
for (n = 0; n < params->tcp_numlayers; ++n) {
rate = 0;
if (params->tcp_rates[0] == 0) {
params->tcp_rates[n] = max_rate;
} else {
rate = ((float)(components * im->xsize * im->ysize * 8)
/ (params->tcp_rates[n] * 8));
if (rate > CINEMA_24_CS_LENGTH)
params->tcp_rates[n] = max_rate;
}
}
params->max_comp_size = COMP_24_CS_MAX_LENGTH;
} else {
float max_rate = ((float)(components * im->xsize * im->ysize * 8)
/ (CINEMA_48_CS_LENGTH * 8));
for (n = 0; n < params->tcp_numlayers; ++n) {
rate = 0;
if (params->tcp_rates[0] == 0) {
params->tcp_rates[n] = max_rate;
} else {
rate = ((float)(components * im->xsize * im->ysize * 8)
/ (params->tcp_rates[n] * 8));
if (rate > CINEMA_48_CS_LENGTH)
params->tcp_rates[n] = max_rate;
}
}
params->max_comp_size = COMP_48_CS_MAX_LENGTH;
}
}
static int
j2k_encode_entry(Imaging im, ImagingCodecState state)
{
JPEG2KENCODESTATE *context = (JPEG2KENCODESTATE *)state->context;
opj_stream_t *stream = NULL;
opj_image_t *image = NULL;
opj_codec_t *codec = NULL;
opj_cparameters_t params;
unsigned components;
OPJ_COLOR_SPACE color_space;
opj_image_cmptparm_t image_params[4];
unsigned xsiz, ysiz;
unsigned tile_width, tile_height;
unsigned tiles_x, tiles_y;
unsigned x, y, tile_ndx;
unsigned n;
j2k_pack_tile_t pack;
int ret = -1;
unsigned prec = 8;
unsigned bpp = 8;
unsigned _overflow_scale_factor;
stream = opj_stream_create(BUFFER_SIZE, OPJ_FALSE);
if (!stream) {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
opj_stream_set_write_function(stream, j2k_write);
opj_stream_set_skip_function(stream, j2k_skip);
opj_stream_set_seek_function(stream, j2k_seek);
/* OpenJPEG 2.0 doesn't have OPJ_VERSION_MAJOR */
#ifndef OPJ_VERSION_MAJOR
opj_stream_set_user_data(stream, state);
#else
opj_stream_set_user_data(stream, state, NULL);
#endif
/* Setup an opj_image */
if (strcmp (im->mode, "L") == 0) {
components = 1;
color_space = OPJ_CLRSPC_GRAY;
pack = j2k_pack_l;
} else if (strcmp (im->mode, "I;16") == 0){
components = 1;
color_space = OPJ_CLRSPC_GRAY;
pack = j2k_pack_i16;
prec = 16;
bpp = 12;
} else if (strcmp (im->mode, "I;16B") == 0){
components = 1;
color_space = OPJ_CLRSPC_GRAY;
pack = j2k_pack_i16;
prec = 16;
bpp = 12;
} else if (strcmp (im->mode, "LA") == 0) {
components = 2;
color_space = OPJ_CLRSPC_GRAY;
pack = j2k_pack_la;
} else if (strcmp (im->mode, "RGB") == 0) {
components = 3;
color_space = OPJ_CLRSPC_SRGB;
pack = j2k_pack_rgb;
} else if (strcmp (im->mode, "YCbCr") == 0) {
components = 3;
color_space = OPJ_CLRSPC_SYCC;
pack = j2k_pack_rgb;
} else if (strcmp (im->mode, "RGBA") == 0) {
components = 4;
color_space = OPJ_CLRSPC_SRGB;
pack = j2k_pack_rgba;
} else {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
for (n = 0; n < components; ++n) {
image_params[n].dx = image_params[n].dy = 1;
image_params[n].w = im->xsize;
image_params[n].h = im->ysize;
image_params[n].x0 = image_params[n].y0 = 0;
image_params[n].prec = prec;
image_params[n].bpp = bpp;
image_params[n].sgnd = 0;
}
image = opj_image_create(components, image_params, color_space);
if (!image) {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
/* Setup compression context */
context->error_msg = NULL;
opj_set_default_encoder_parameters(&params);
params.image_offset_x0 = context->offset_x;
params.image_offset_y0 = context->offset_y;
if (context->tile_size_x && context->tile_size_y) {
params.tile_size_on = OPJ_TRUE;
params.cp_tx0 = context->tile_offset_x;
params.cp_ty0 = context->tile_offset_y;
params.cp_tdx = context->tile_size_x;
params.cp_tdy = context->tile_size_y;
tile_width = params.cp_tdx;
tile_height = params.cp_tdy;
} else {
params.cp_tx0 = 0;
params.cp_ty0 = 0;
params.cp_tdx = 1;
params.cp_tdy = 1;
tile_width = im->xsize;
tile_height = im->ysize;
}
if (context->quality_layers && PySequence_Check(context->quality_layers)) {
Py_ssize_t len = PySequence_Length(context->quality_layers);
Py_ssize_t n;
float *pq;
if (len) {
if (len > sizeof(params.tcp_rates) / sizeof(params.tcp_rates[0]))
len = sizeof(params.tcp_rates)/sizeof(params.tcp_rates[0]);
params.tcp_numlayers = (int)len;
if (context->quality_is_in_db) {
params.cp_disto_alloc = params.cp_fixed_alloc = 0;
params.cp_fixed_quality = 1;
pq = params.tcp_distoratio;
} else {
params.cp_disto_alloc = 1;
params.cp_fixed_alloc = params.cp_fixed_quality = 0;
pq = params.tcp_rates;
}
for (n = 0; n < len; ++n) {
PyObject *obj = PySequence_ITEM(context->quality_layers, n);
pq[n] = PyFloat_AsDouble(obj);
}
}
} else {
params.tcp_numlayers = 1;
params.tcp_rates[0] = 0;
params.cp_disto_alloc = 1;
}
if (context->num_resolutions)
params.numresolution = context->num_resolutions;
if (context->cblk_width >= 4 && context->cblk_width <= 1024
&& context->cblk_height >= 4 && context->cblk_height <= 1024
&& context->cblk_width * context->cblk_height <= 4096) {
params.cblockw_init = context->cblk_width;
params.cblockh_init = context->cblk_height;
}
if (context->precinct_width >= 4 && context->precinct_height >= 4
&& context->precinct_width >= context->cblk_width
&& context->precinct_height > context->cblk_height) {
params.prcw_init[0] = context->precinct_width;
params.prch_init[0] = context->precinct_height;
params.res_spec = 1;
params.csty |= 0x01;
}
params.irreversible = context->irreversible;
params.prog_order = context->progression;
params.cp_cinema = context->cinema_mode;
switch (params.cp_cinema) {
case OPJ_OFF:
params.cp_rsiz = OPJ_STD_RSIZ;
break;
case OPJ_CINEMA2K_24:
case OPJ_CINEMA2K_48:
params.cp_rsiz = OPJ_CINEMA2K;
if (params.numresolution > 6)
params.numresolution = 6;
break;
case OPJ_CINEMA4K_24:
params.cp_rsiz = OPJ_CINEMA4K;
if (params.numresolution > 7)
params.numresolution = 7;
break;
}
if (context->cinema_mode != OPJ_OFF)
j2k_set_cinema_params(im, components, &params);
/* Set up the reference grid in the image */
image->x0 = params.image_offset_x0;
image->y0 = params.image_offset_y0;
image->x1 = xsiz = im->xsize + params.image_offset_x0;
image->y1 = ysiz = im->ysize + params.image_offset_y0;
/* Create the compressor */
codec = opj_create_compress(context->format);
if (!codec) {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
opj_set_error_handler(codec, j2k_error, context);
opj_set_info_handler(codec, j2k_warn, context);
opj_set_warning_handler(codec, j2k_warn, context);
opj_setup_encoder(codec, &params, image);
/* Start encoding */
if (!opj_start_compress(codec, image, stream)) {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
/* Write each tile */
tiles_x = (im->xsize + (params.image_offset_x0 - params.cp_tx0)
+ tile_width - 1) / tile_width;
tiles_y = (im->ysize + (params.image_offset_y0 - params.cp_ty0)
+ tile_height - 1) / tile_height;
/* check for integer overflow for the malloc line, checking any expression
that may multiply either tile_width or tile_height */
_overflow_scale_factor = components * prec;
if (( tile_width > UINT_MAX / _overflow_scale_factor ) ||
( tile_height > UINT_MAX / _overflow_scale_factor ) ||
( tile_width > UINT_MAX / (tile_height * _overflow_scale_factor )) ||
( tile_height > UINT_MAX / (tile_width * _overflow_scale_factor ))) {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
/* malloc check ok, checked for overflow above */
state->buffer = malloc (tile_width * tile_height * components * prec / 8);
if (!state->buffer) {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
tile_ndx = 0;
for (y = 0; y < tiles_y; ++y) {
unsigned ty0 = params.cp_ty0 + y * tile_height;
unsigned ty1 = ty0 + tile_height;
unsigned pixy, pixh;
if (ty0 < params.image_offset_y0)
ty0 = params.image_offset_y0;
if (ty1 > ysiz)
ty1 = ysiz;
pixy = ty0 - params.image_offset_y0;
pixh = ty1 - ty0;
for (x = 0; x < tiles_x; ++x) {
unsigned tx0 = params.cp_tx0 + x * tile_width;
unsigned tx1 = tx0 + tile_width;
unsigned pixx, pixw;
unsigned data_size;
if (tx0 < params.image_offset_x0)
tx0 = params.image_offset_x0;
if (tx1 > xsiz)
tx1 = xsiz;
pixx = tx0 - params.image_offset_x0;
pixw = tx1 - tx0;
pack(im, state->buffer, pixx, pixy, pixw, pixh);
data_size = pixw * pixh * components * prec / 8;
if (!opj_write_tile(codec, tile_ndx++, state->buffer,
data_size, stream)) {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
}
}
if (!opj_end_compress(codec, stream)) {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
state->errcode = IMAGING_CODEC_END;
state->state = J2K_STATE_DONE;
ret = -1;
quick_exit:
if (codec)
opj_destroy_codec(codec);
if (image)
opj_image_destroy(image);
if (stream)
opj_stream_destroy(stream);
return ret;
}
int
ImagingJpeg2KEncode(Imaging im, ImagingCodecState state, UINT8 *buf, int bytes)
{
if (state->state == J2K_STATE_FAILED)
return -1;
if (state->state == J2K_STATE_START) {
state->state = J2K_STATE_ENCODING;
return j2k_encode_entry(im, state);
}
return -1;
}
/* -------------------------------------------------------------------- */
/* Cleanup */
/* -------------------------------------------------------------------- */
int
ImagingJpeg2KEncodeCleanup(ImagingCodecState state) {
JPEG2KENCODESTATE *context = (JPEG2KENCODESTATE *)state->context;
if (context->quality_layers) {
Py_XDECREF(context->quality_layers);
context->quality_layers = NULL;
}
if (context->error_msg)
free ((void *)context->error_msg);
context->error_msg = NULL;
return -1;
}
#endif /* HAVE_OPENJPEG */
/*
* Local Variables:
* c-basic-offset: 4
* End:
*
*/
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