/* * 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; AVCodecParameters *par; AVFrame *frame; int frame_decoded, ret = 0; AVPacket pkt; AVDictionary *opt=NULL; av_init_packet(&pkt); iformat = av_find_input_format("image2pipe"); 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; } par = format_ctx->streams[0]->codecpar; codec = avcodec_find_decoder(par->codec_id); if (!codec) { av_log(log_ctx, AV_LOG_ERROR, "Failed to find codec\n"); ret = AVERROR(EINVAL); goto end; } codec_ctx = avcodec_alloc_context3(codec); if (!codec_ctx) { av_log(log_ctx, AV_LOG_ERROR, "Failed to alloc video decoder context\n"); ret = AVERROR(ENOMEM); goto end; } ret = avcodec_parameters_to_context(codec_ctx, par); if (ret < 0) { av_log(log_ctx, AV_LOG_ERROR, "Failed to copy codec parameters to decoder context\n"); 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_free_context(&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; }