/* * Copyright 2012 Stefano Sabatini <stefasab gmail com> * * 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 */ #include "libavutil/imgutils.h"#include "lavfutils.h" int ff_load_image(uint8_t *data[4], int linesize[4],                  int *w, int *h, enum AVPixelFormat *pix_fmt,                  const char *filename, void *log_ctx){    AVInputFormat *iformat = NULL;    AVFormatContext *format_ctx = NULL;    AVCodec *codec;    AVCodecContext *codec_ctx;    AVFrame *frame;    int frame_decoded, ret = 0;    AVPacket pkt;    AVDictionary *opt=NULL;     av_init_packet(&pkt);     av_register_all();     iformat = av_find_input_format("image2");    if ((ret = avformat_open_input(&format_ctx, filename, iformat, NULL)) < 0) {        av_log(log_ctx, AV_LOG_ERROR,               "Failed to open input file '%s'\n", filename);        return ret;    }     if ((ret = avformat_find_stream_info(format_ctx, NULL)) < 0) {        av_log(log_ctx, AV_LOG_ERROR, "Find stream info failed\n");        return ret;    }     codec_ctx = format_ctx->streams[0]->codec;    codec = avcodec_find_decoder(codec_ctx->codec_id);    if (!codec) {        av_log(log_ctx, AV_LOG_ERROR, "Failed to find codec\n");        ret = AVERROR(EINVAL);        goto end;    }     av_dict_set(&opt, "thread_type", "slice", 0);    if ((ret = avcodec_open2(codec_ctx, codec, &opt)) < 0) {        av_log(log_ctx, AV_LOG_ERROR, "Failed to open codec\n");        goto end;    }     if (!(frame = av_frame_alloc()) ) {        av_log(log_ctx, AV_LOG_ERROR, "Failed to alloc frame\n");        ret = AVERROR(ENOMEM);        goto end;    }     ret = av_read_frame(format_ctx, &pkt);    if (ret < 0) {        av_log(log_ctx, AV_LOG_ERROR, "Failed to read frame from file\n");        goto end;    }     ret = avcodec_decode_video2(codec_ctx, frame, &frame_decoded, &pkt);    if (ret < 0 || !frame_decoded) {        av_log(log_ctx, AV_LOG_ERROR, "Failed to decode image from file\n");        if (ret >= 0)            ret = -1;        goto end;    }     *w       = frame->width;    *h       = frame->height;    *pix_fmt = frame->format;     if ((ret = av_image_alloc(data, linesize, *w, *h, *pix_fmt, 16)) < 0)        goto end;    ret = 0;     av_image_copy(data, linesize, (const uint8_t **)frame->data, frame->linesize, *pix_fmt, *w, *h); end:    av_packet_unref(&pkt);    avcodec_close(codec_ctx);    avformat_close_input(&format_ctx);    av_frame_free(&frame);    av_dict_free(&opt);     if (ret < 0)        av_log(log_ctx, AV_LOG_ERROR, "Error loading image file '%s'\n", filename);    return ret;}