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95 lines
2.9 KiB
95 lines
2.9 KiB
/* |
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* Copyright 2012 Stefano Sabatini <stefasab gmail com> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/imgutils.h" |
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#include "lavfutils.h" |
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int ff_load_image(uint8_t *data[4], int linesize[4], |
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int *w, int *h, enum AVPixelFormat *pix_fmt, |
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const char *filename, void *log_ctx) |
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{ |
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AVInputFormat *iformat = NULL; |
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AVFormatContext *format_ctx = NULL; |
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AVCodec *codec; |
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AVCodecContext *codec_ctx; |
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AVFrame *frame; |
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int frame_decoded, ret = 0; |
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AVPacket pkt; |
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av_register_all(); |
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iformat = av_find_input_format("image2"); |
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if ((ret = avformat_open_input(&format_ctx, filename, iformat, NULL)) < 0) { |
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av_log(log_ctx, AV_LOG_ERROR, |
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"Failed to open input file '%s'\n", filename); |
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return ret; |
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} |
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codec_ctx = format_ctx->streams[0]->codec; |
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codec = avcodec_find_decoder(codec_ctx->codec_id); |
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if (!codec) { |
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av_log(log_ctx, AV_LOG_ERROR, "Failed to find codec\n"); |
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ret = AVERROR(EINVAL); |
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goto end; |
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} |
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if ((ret = avcodec_open2(codec_ctx, codec, NULL)) < 0) { |
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av_log(log_ctx, AV_LOG_ERROR, "Failed to open codec\n"); |
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goto end; |
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} |
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if (!(frame = avcodec_alloc_frame()) ) { |
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av_log(log_ctx, AV_LOG_ERROR, "Failed to alloc frame\n"); |
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ret = AVERROR(ENOMEM); |
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goto end; |
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} |
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ret = av_read_frame(format_ctx, &pkt); |
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if (ret < 0) { |
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av_log(log_ctx, AV_LOG_ERROR, "Failed to read frame from file\n"); |
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goto end; |
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} |
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ret = avcodec_decode_video2(codec_ctx, frame, &frame_decoded, &pkt); |
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if (ret < 0 || !frame_decoded) { |
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av_log(log_ctx, AV_LOG_ERROR, "Failed to decode image from file\n"); |
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goto end; |
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} |
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ret = 0; |
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*w = frame->width; |
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*h = frame->height; |
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*pix_fmt = frame->format; |
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if ((ret = av_image_alloc(data, linesize, *w, *h, *pix_fmt, 16)) < 0) |
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goto end; |
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ret = 0; |
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av_image_copy(data, linesize, (const uint8_t **)frame->data, frame->linesize, *pix_fmt, *w, *h); |
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end: |
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avcodec_close(codec_ctx); |
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avformat_close_input(&format_ctx); |
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av_freep(&frame); |
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if (ret < 0) |
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av_log(log_ctx, AV_LOG_ERROR, "Error loading image file '%s'\n", filename); |
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return ret; |
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}
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