diff options
Diffstat (limited to 'libavfilter/lavfutils.c')
-rw-r--r-- | libavfilter/lavfutils.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/libavfilter/lavfutils.c b/libavfilter/lavfutils.c new file mode 100644 index 0000000..75e68a7 --- /dev/null +++ b/libavfilter/lavfutils.c @@ -0,0 +1,104 @@ +/* + * 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; + } + + 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; + } + + 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 = 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_free_packet(&pkt); + avcodec_close(codec_ctx); + avformat_close_input(&format_ctx); + av_frame_free(&frame); + + if (ret < 0) + av_log(log_ctx, AV_LOG_ERROR, "Error loading image file '%s'\n", filename); + return ret; +} |