0,0 → 1,98 |
/* |
* 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; |
|
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; |
} |
|
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; |
} |
|
if ((ret = avcodec_open2(codec_ctx, codec, NULL)) < 0) { |
av_log(log_ctx, AV_LOG_ERROR, "Failed to open codec\n"); |
goto end; |
} |
|
if (!(frame = avcodec_alloc_frame()) ) { |
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"); |
goto end; |
} |
ret = 0; |
|
*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_free_packet(&pkt); |
avcodec_close(codec_ctx); |
avformat_close_input(&format_ctx); |
av_freep(&frame); |
|
if (ret < 0) |
av_log(log_ctx, AV_LOG_ERROR, "Error loading image file '%s'\n", filename); |
return ret; |
} |