diff options
Diffstat (limited to 'libavcodec/libopenjpegdec.c')
| -rw-r--r-- | libavcodec/libopenjpegdec.c | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/libavcodec/libopenjpegdec.c b/libavcodec/libopenjpegdec.c new file mode 100644 index 0000000000..4e8c5daff1 --- /dev/null +++ b/libavcodec/libopenjpegdec.c @@ -0,0 +1,374 @@ +/* + * 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), +}; |