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FFmpeg/libavcodec/libopenjpegdec.c
Vittorio Giovara e96c3b81ca avutil: rename AV_PIX_FMT_Y400A to AV_PIX_FMT_YA8 
The rationale is that you have a packed format in form
<greyscale sample> <alpha sample> <greyscale sample> <alpha sample>
and shortening greyscale to 'G' might make one thing about Greenscale instead.
An alias pixel format and color space name are provided for compatibility.
2014-08-04 12:55:08 +01:00

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/*
* JPEG 2000 decoding support via OpenJPEG
* Copyright (c) 2009 Jaikrishnan Menon <realityman@gmx.net>
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; 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
*/
#define OPJ_STATIC
#include <openjpeg.h>
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/pixfmt.h"
#include "avcodec.h"
#include "internal.h"
#include "thread.h"
#define JP2_SIG_TYPE 0x6A502020
#define JP2_SIG_VALUE 0x0D0A870A
// pix_fmts with lower bpp have to be listed before
// similar pix_fmts with higher bpp.
#define RGB_PIXEL_FORMATS AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA, \
AV_PIX_FMT_RGB48, AV_PIX_FMT_RGBA64
#define GRAY_PIXEL_FORMATS AV_PIX_FMT_GRAY8, AV_PIX_FMT_YA8, \
AV_PIX_FMT_GRAY16
#define YUV_PIXEL_FORMATS AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, \
AV_PIX_FMT_YUVA420P, \
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, \
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P, \
AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, \
AV_PIX_FMT_YUV444P9, \
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, \
AV_PIX_FMT_YUV444P10, \
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, \
AV_PIX_FMT_YUV444P16
#define XYZ_PIXEL_FORMATS AV_PIX_FMT_XYZ12
static const enum AVPixelFormat rgb_pix_fmts[] = {
RGB_PIXEL_FORMATS
};
static const enum AVPixelFormat gray_pix_fmts[] = {
GRAY_PIXEL_FORMATS
};
static const enum AVPixelFormat yuv_pix_fmts[] = {
YUV_PIXEL_FORMATS
};
static const enum AVPixelFormat any_pix_fmts[] = {
RGB_PIXEL_FORMATS, GRAY_PIXEL_FORMATS, YUV_PIXEL_FORMATS, XYZ_PIXEL_FORMATS
};
typedef struct {
AVClass *class;
opj_dparameters_t dec_params;
int lowres;
int lowqual;
} LibOpenJPEGContext;
static int libopenjpeg_matches_pix_fmt(const opj_image_t *img,
enum AVPixelFormat pix_fmt)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
int match = 1;
if (desc->nb_components != img->numcomps) {
return 0;
}
switch (desc->nb_components) {
case 4:
match = match &&
desc->comp[3].depth_minus1 + 1 >= img->comps[3].prec &&
1 == img->comps[3].dx &&
1 == img->comps[3].dy;
case 3:
match = match &&
desc->comp[2].depth_minus1 + 1 >= img->comps[2].prec &&
1 << desc->log2_chroma_w == img->comps[2].dx &&
1 << desc->log2_chroma_h == img->comps[2].dy;
case 2:
match = match &&
desc->comp[1].depth_minus1 + 1 >= img->comps[1].prec &&
1 << desc->log2_chroma_w == img->comps[1].dx &&
1 << desc->log2_chroma_h == img->comps[1].dy;
case 1:
match = match &&
desc->comp[0].depth_minus1 + 1 >= img->comps[0].prec &&
1 == img->comps[0].dx &&
1 == img->comps[0].dy;
default:
break;
}
return match;
}
static enum AVPixelFormat libopenjpeg_guess_pix_fmt(const opj_image_t *image)
{
int index;
const enum AVPixelFormat *possible_fmts = NULL;
int possible_fmts_nb = 0;
switch (image->color_space) {
case CLRSPC_SRGB:
possible_fmts = rgb_pix_fmts;
possible_fmts_nb = FF_ARRAY_ELEMS(rgb_pix_fmts);
break;
case CLRSPC_GRAY:
possible_fmts = gray_pix_fmts;
possible_fmts_nb = FF_ARRAY_ELEMS(gray_pix_fmts);
break;
case CLRSPC_SYCC:
possible_fmts = yuv_pix_fmts;
possible_fmts_nb = FF_ARRAY_ELEMS(yuv_pix_fmts);
break;
default:
possible_fmts = any_pix_fmts;
possible_fmts_nb = FF_ARRAY_ELEMS(any_pix_fmts);
break;
}
for (index = 0; index < possible_fmts_nb; ++index)
if (libopenjpeg_matches_pix_fmt(image, possible_fmts[index])) {
return possible_fmts[index];
}
return AV_PIX_FMT_NONE;
}
static inline int libopenjpeg_ispacked(enum AVPixelFormat pix_fmt)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
int i, component_plane;
if (pix_fmt == AV_PIX_FMT_GRAY16)
return 0;
component_plane = desc->comp[0].plane;
for (i = 1; i < desc->nb_components; i++)
if (component_plane != desc->comp[i].plane)
return 0;
return 1;
}
static 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 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 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 void libopenjpeg_copyto16(AVFrame *p, 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 *)(p->data[index] + y * p->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);
return 0;
}
static int libopenjpeg_decode_frame(AVCodecContext *avctx,
void *data, int *got_frame,
AVPacket *avpkt)
{
uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
LibOpenJPEGContext *ctx = avctx->priv_data;
ThreadFrame frame = { .f = data };
AVFrame *picture = data;
const AVPixFmtDescriptor *desc;
opj_dinfo_t *dec;
opj_cio_t *stream;
opj_image_t *image;
int width, height, ret;
int pixel_size = 0;
int ispacked = 0;
int i;
*got_frame = 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 AVERROR_UNKNOWN;
}
opj_set_event_mgr((opj_common_ptr) dec, NULL, NULL);
ctx->dec_params.cp_limit_decoding = LIMIT_TO_MAIN_HEADER;
ctx->dec_params.cp_reduce = ctx->lowres;
ctx->dec_params.cp_layer = ctx->lowqual;
// 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 AVERROR_UNKNOWN;
}
// 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 AVERROR_UNKNOWN;
}
width = image->x1 - image->x0;
height = image->y1 - image->y0;
if (ctx->lowres) {
width = (width + (1 << ctx->lowres) - 1) >> ctx->lowres;
height = (height + (1 << ctx->lowres) - 1) >> ctx->lowres;
}
ret = ff_set_dimensions(avctx, width, height);
if (ret < 0)
goto done;
if (avctx->pix_fmt != AV_PIX_FMT_NONE)
if (!libopenjpeg_matches_pix_fmt(image, avctx->pix_fmt))
avctx->pix_fmt = AV_PIX_FMT_NONE;
if (avctx->pix_fmt == AV_PIX_FMT_NONE)
avctx->pix_fmt = libopenjpeg_guess_pix_fmt(image);
if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
av_log(avctx, AV_LOG_ERROR, "Unable to determine pixel format\n");
ret = AVERROR_INVALIDDATA;
goto done;
}
for (i = 0; i < image->numcomps; i++)
if (image->comps[i].prec > avctx->bits_per_raw_sample)
avctx->bits_per_raw_sample = image->comps[i].prec;
if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) {
av_log(avctx, AV_LOG_ERROR, "ff_thread_get_buffer() failed\n");
goto done;
}
ctx->dec_params.cp_limit_decoding = NO_LIMITATION;
// 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");
ret = AVERROR_UNKNOWN;
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");
ret = AVERROR_UNKNOWN;
goto done;
}
desc = av_pix_fmt_desc_get(avctx->pix_fmt);
pixel_size = desc->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);
ret = AVERROR_PATCHWELCOME;
goto done;
}
*got_frame = 1;
ret = buf_size;
done:
opj_image_destroy(image);
opj_destroy_decompress(dec);
return ret;
}
#define OFFSET(x) offsetof(LibOpenJPEGContext, x)
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
{ "lowqual", "Limit the number of layers used for decoding",
OFFSET(lowqual), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VD },
{ "lowres", "Lower the decoding resolution by a power of two",
OFFSET(lowres), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VD },
{ NULL },
};
static const AVClass class = {
.class_name = "libopenjpeg",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVCodec ff_libopenjpeg_decoder = {
.name = "libopenjpeg",
.long_name = NULL_IF_CONFIG_SMALL("OpenJPEG JPEG 2000"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_JPEG2000,
.priv_data_size = sizeof(LibOpenJPEGContext),
.init = libopenjpeg_decode_init,
.decode = libopenjpeg_decode_frame,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
.priv_class = &class,
};
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