| /* |
| * 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; |
| const AVCodec *codec; |
| AVCodecContext *codec_ctx = NULL; |
| AVCodecParameters *par; |
| AVFrame *frame = NULL; |
| int ret = 0; |
| AVPacket pkt; |
| AVDictionary *opt=NULL; |
| |
| 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"); |
| goto end; |
| } |
| |
| 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_send_packet(codec_ctx, &pkt); |
| av_packet_unref(&pkt); |
| if (ret < 0) { |
| av_log(log_ctx, AV_LOG_ERROR, "Error submitting a packet to decoder\n"); |
| goto end; |
| } |
| |
| ret = avcodec_receive_frame(codec_ctx, frame); |
| if (ret < 0) { |
| av_log(log_ctx, AV_LOG_ERROR, "Failed to decode image from file\n"); |
| 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: |
| 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; |
| } |