RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
ffmpeg/libavcodec/libopenjpegdec.c

375 lines
11 KiB
C
Raw Blame History

/*
* JPEG 2000 decoding support via OpenJPEG
* Copyright (c) 2009 Jaikrishnan Menon <realityman@gmx.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
* JPEG 2000 decoder using libopenjpeg
*/
#include "libavutil/imgutils.h"
#include "libavutil/pixfmt.h"
#include "avcodec.h"
#include "libavutil/intreadwrite.h"
#include "thread.h"
#define OPJ_STATIC
#include <openjpeg.h>
#define JP2_SIG_TYPE 0x6A502020
#define JP2_SIG_VALUE 0x0D0A870A
typedef struct {
opj_dparameters_t dec_params;
AVFrame image;
} LibOpenJPEGContext;
static enum PixelFormat check_image_attributes(AVCodecContext *avctx, opj_image_t *image)
{
opj_image_comp_t c0 = image->comps[0];
opj_image_comp_t c1 = image->comps[1];
opj_image_comp_t c2 = image->comps[2];
int compRatio = 0;
compRatio |= c0.dx << 15 | c0.dy << 12;
compRatio |= c1.dx << 9 | c1.dy << 6;
compRatio |= c2.dx << 3 | c2.dy;
if (image->numcomps == 4) {
if (c0.prec == 8) {
if (compRatio == 0112222 &&
image->comps[3].dx == 1 && image->comps[3].dy == 1) {
return PIX_FMT_YUVA420P;
} else {
return PIX_FMT_RGBA;
}
} else {
return PIX_FMT_RGBA64;
}
}
switch (compRatio) {
case 0111111: goto libopenjpeg_yuv444_rgb;
case 0111212: return PIX_FMT_YUV440P;
case 0112121: goto libopenjpeg_yuv422;
case 0112222: goto libopenjpeg_yuv420;
default: goto libopenjpeg_rgb;
}
libopenjpeg_yuv420:
switch (c0.prec) {
case 8: return PIX_FMT_YUV420P;
case 9: return PIX_FMT_YUV420P9;
case 10: return PIX_FMT_YUV420P10;
case 16: return PIX_FMT_YUV420P16;
}
libopenjpeg_yuv422:
switch (c0.prec) {
case 8: return PIX_FMT_YUV422P;
case 9: return PIX_FMT_YUV422P9;
case 10: return PIX_FMT_YUV422P10;
case 16: return PIX_FMT_YUV422P16;
}
libopenjpeg_yuv444_rgb:
switch (c0.prec) {
case 8: return PIX_FMT_RGB24;
case 9: return PIX_FMT_YUV444P9;
case 10: return PIX_FMT_YUV444P10;
case 16: return PIX_FMT_YUV444P16;
}
libopenjpeg_rgb:
switch (c0.prec) {
case 8: return PIX_FMT_RGB24;
default: return PIX_FMT_RGB48;
}
return PIX_FMT_RGB24;
}
static inline int libopenjpeg_ispacked(enum PixelFormat pix_fmt) {
int i, component_plane;
if (pix_fmt == PIX_FMT_GRAY16)
return 0;
component_plane = av_pix_fmt_descriptors[pix_fmt].comp[0].plane;
for(i = 1; i < av_pix_fmt_descriptors[pix_fmt].nb_components; i++) {
if (component_plane != av_pix_fmt_descriptors[pix_fmt].comp[i].plane)
return 0;
}
return 1;
}
static inline void libopenjpeg_copy_to_packed8(AVFrame *picture, opj_image_t *image) {
uint8_t *img_ptr;
int index, x, y, c;
for(y = 0; y < picture->height; y++) {
index = y*picture->width;
img_ptr = picture->data[0] + y*picture->linesize[0];
for(x = 0; x < picture->width; x++, index++) {
for(c = 0; c < image->numcomps; c++) {
*img_ptr++ = image->comps[c].data[index];
}
}
}
}
static inline void libopenjpeg_copy_to_packed16(AVFrame *picture, opj_image_t *image) {
uint16_t *img_ptr;
int index, x, y, c;
int adjust[4];
for (x = 0; x < image->numcomps; x++) {
adjust[x] = FFMAX(FFMIN(16 - image->comps[x].prec, 8), 0);
}
for (y = 0; y < picture->height; y++) {
index = y*picture->width;
img_ptr = (uint16_t*) (picture->data[0] + y*picture->linesize[0]);
for (x = 0; x < picture->width; x++, index++) {
for (c = 0; c < image->numcomps; c++) {
*img_ptr++ = image->comps[c].data[index] << adjust[c];
}
}
}
}
static inline void libopenjpeg_copyto8(AVFrame *picture, opj_image_t *image) {
int *comp_data;
uint8_t *img_ptr;
int index, x, y;
for(index = 0; index < image->numcomps; index++) {
comp_data = image->comps[index].data;
for(y = 0; y < image->comps[index].h; y++) {
img_ptr = picture->data[index] + y * picture->linesize[index];
for(x = 0; x < image->comps[index].w; x++) {
*img_ptr = (uint8_t) *comp_data;
img_ptr++;
comp_data++;
}
}
}
}
static inline void libopenjpeg_copyto16(AVFrame *picture, opj_image_t *image) {
int *comp_data;
uint16_t *img_ptr;
int index, x, y;
for(index = 0; index < image->numcomps; index++) {
comp_data = image->comps[index].data;
for(y = 0; y < image->comps[index].h; y++) {
img_ptr = (uint16_t*) (picture->data[index] + y * picture->linesize[index]);
for(x = 0; x < image->comps[index].w; x++) {
*img_ptr = *comp_data;
img_ptr++;
comp_data++;
}
}
}
}
static av_cold int libopenjpeg_decode_init(AVCodecContext *avctx)
{
LibOpenJPEGContext *ctx = avctx->priv_data;
opj_set_default_decoder_parameters(&ctx->dec_params);
avcodec_get_frame_defaults(&ctx->image);
avctx->coded_frame = &ctx->image;
return 0;
}
static av_cold int libopenjpeg_decode_init_thread_copy(AVCodecContext *avctx)
{
LibOpenJPEGContext *ctx = avctx->priv_data;
avctx->coded_frame = &ctx->image;
return 0;
}
static int libopenjpeg_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
AVPacket *avpkt)
{
uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
LibOpenJPEGContext *ctx = avctx->priv_data;
AVFrame *picture = &ctx->image, *output = data;
opj_dinfo_t *dec;
opj_cio_t *stream;
opj_image_t *image;
int width, height, ret = -1;
int pixel_size = 0;
int ispacked = 0;
*data_size = 0;
// Check if input is a raw jpeg2k codestream or in jp2 wrapping
if((AV_RB32(buf) == 12) &&
(AV_RB32(buf + 4) == JP2_SIG_TYPE) &&
(AV_RB32(buf + 8) == JP2_SIG_VALUE)) {
dec = opj_create_decompress(CODEC_JP2);
} else {
// If the AVPacket contains a jp2c box, then skip to
// the starting byte of the codestream.
if (AV_RB32(buf + 4) == AV_RB32("jp2c"))
buf += 8;
dec = opj_create_decompress(CODEC_J2K);
}
if(!dec) {
av_log(avctx, AV_LOG_ERROR, "Error initializing decoder.\n");
return -1;
}
opj_set_event_mgr((opj_common_ptr)dec, NULL, NULL);
ctx->dec_params.cp_limit_decoding = LIMIT_TO_MAIN_HEADER;
// Tie decoder with decoding parameters
opj_setup_decoder(dec, &ctx->dec_params);
stream = opj_cio_open((opj_common_ptr)dec, buf, buf_size);
if(!stream) {
av_log(avctx, AV_LOG_ERROR, "Codestream could not be opened for reading.\n");
opj_destroy_decompress(dec);
return -1;
}
// Decode the header only
image = opj_decode_with_info(dec, stream, NULL);
opj_cio_close(stream);
if(!image) {
av_log(avctx, AV_LOG_ERROR, "Error decoding codestream.\n");
opj_destroy_decompress(dec);
return -1;
}
width = image->x1 - image->x0;
height = image->y1 - image->y0;
if(av_image_check_size(width, height, 0, avctx) < 0) {
av_log(avctx, AV_LOG_ERROR, "%dx%d dimension invalid.\n", width, height);
goto done;
}
avcodec_set_dimensions(avctx, width, height);
switch (image->numcomps) {
case 1: avctx->pix_fmt = (image->comps[0].prec == 8) ? PIX_FMT_GRAY8 : PIX_FMT_GRAY16;
break;
case 2: avctx->pix_fmt = PIX_FMT_GRAY8A;
break;
case 3:
case 4: avctx->pix_fmt = check_image_attributes(avctx, image);
break;
default: av_log(avctx, AV_LOG_ERROR, "%d components unsupported.\n", image->numcomps);
goto done;
}
if(picture->data[0])
ff_thread_release_buffer(avctx, picture);
if(ff_thread_get_buffer(avctx, picture) < 0){
av_log(avctx, AV_LOG_ERROR, "ff_thread_get_buffer() failed\n");
goto done;
}
ctx->dec_params.cp_limit_decoding = NO_LIMITATION;
ctx->dec_params.cp_reduce = avctx->lowres;
// Tie decoder with decoding parameters
opj_setup_decoder(dec, &ctx->dec_params);
stream = opj_cio_open((opj_common_ptr)dec, buf, buf_size);
if(!stream) {
av_log(avctx, AV_LOG_ERROR, "Codestream could not be opened for reading.\n");
goto done;
}
opj_image_destroy(image);
// Decode the codestream
image = opj_decode_with_info(dec, stream, NULL);
opj_cio_close(stream);
if(!image) {
av_log(avctx, AV_LOG_ERROR, "Error decoding codestream.\n");
goto done;
}
pixel_size = av_pix_fmt_descriptors[avctx->pix_fmt].comp[0].step_minus1 + 1;
ispacked = libopenjpeg_ispacked(avctx->pix_fmt);
switch (pixel_size) {
case 1:
if (ispacked) {
libopenjpeg_copy_to_packed8(picture, image);
} else {
libopenjpeg_copyto8(picture, image);
}
break;
case 2:
if (ispacked) {
libopenjpeg_copy_to_packed8(picture, image);
} else {
libopenjpeg_copyto16(picture, image);
}
break;
case 3:
case 4:
if (ispacked) {
libopenjpeg_copy_to_packed8(picture, image);
}
break;
case 6:
case 8:
if (ispacked) {
libopenjpeg_copy_to_packed16(picture, image);
}
break;
default:
av_log(avctx, AV_LOG_ERROR, "unsupported pixel size %d\n", pixel_size);
goto done;
}
*output = ctx->image;
*data_size = sizeof(AVPicture);
ret = buf_size;
done:
opj_image_destroy(image);
opj_destroy_decompress(dec);
return ret;
}
static av_cold int libopenjpeg_decode_close(AVCodecContext *avctx)
{
LibOpenJPEGContext *ctx = avctx->priv_data;
if(ctx->image.data[0])
ff_thread_release_buffer(avctx, &ctx->image);
return 0 ;
}
AVCodec ff_libopenjpeg_decoder = {
.name = "libopenjpeg",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_JPEG2000,
.priv_data_size = sizeof(LibOpenJPEGContext),
.init = libopenjpeg_decode_init,
.close = libopenjpeg_decode_close,
.decode = libopenjpeg_decode_frame,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
.max_lowres = 5,
.long_name = NULL_IF_CONFIG_SMALL("OpenJPEG JPEG 2000"),
.init_thread_copy = ONLY_IF_THREADS_ENABLED(libopenjpeg_decode_init_thread_copy),
};
Reference in New Issue View Git Blame Copy Permalink