blob: 706badf63d363d5e473c279bb8617eca11fffcd6
| 1 | /* |
| 2 | * Copyright 2012 Stefano Sabatini <stefasab gmail com> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include "libavutil/imgutils.h" |
| 22 | #include "lavfutils.h" |
| 23 | |
| 24 | int ff_load_image(uint8_t *data[4], int linesize[4], |
| 25 | int *w, int *h, enum AVPixelFormat *pix_fmt, |
| 26 | const char *filename, void *log_ctx) |
| 27 | { |
| 28 | AVInputFormat *iformat = NULL; |
| 29 | AVFormatContext *format_ctx = NULL; |
| 30 | AVCodec *codec; |
| 31 | AVCodecContext *codec_ctx; |
| 32 | AVFrame *frame; |
| 33 | int frame_decoded, ret = 0; |
| 34 | AVPacket pkt; |
| 35 | AVDictionary *opt=NULL; |
| 36 | |
| 37 | av_init_packet(&pkt); |
| 38 | |
| 39 | av_register_all(); |
| 40 | |
| 41 | iformat = av_find_input_format("image2"); |
| 42 | if ((ret = avformat_open_input(&format_ctx, filename, iformat, NULL)) < 0) { |
| 43 | av_log(log_ctx, AV_LOG_ERROR, |
| 44 | "Failed to open input file '%s'\n", filename); |
| 45 | return ret; |
| 46 | } |
| 47 | |
| 48 | if ((ret = avformat_find_stream_info(format_ctx, NULL)) < 0) { |
| 49 | av_log(log_ctx, AV_LOG_ERROR, "Find stream info failed\n"); |
| 50 | return ret; |
| 51 | } |
| 52 | |
| 53 | codec_ctx = format_ctx->streams[0]->codec; |
| 54 | codec = avcodec_find_decoder(codec_ctx->codec_id); |
| 55 | if (!codec) { |
| 56 | av_log(log_ctx, AV_LOG_ERROR, "Failed to find codec\n"); |
| 57 | ret = AVERROR(EINVAL); |
| 58 | goto end; |
| 59 | } |
| 60 | |
| 61 | av_dict_set(&opt, "thread_type", "slice", 0); |
| 62 | if ((ret = avcodec_open2(codec_ctx, codec, &opt)) < 0) { |
| 63 | av_log(log_ctx, AV_LOG_ERROR, "Failed to open codec\n"); |
| 64 | goto end; |
| 65 | } |
| 66 | |
| 67 | if (!(frame = av_frame_alloc()) ) { |
| 68 | av_log(log_ctx, AV_LOG_ERROR, "Failed to alloc frame\n"); |
| 69 | ret = AVERROR(ENOMEM); |
| 70 | goto end; |
| 71 | } |
| 72 | |
| 73 | ret = av_read_frame(format_ctx, &pkt); |
| 74 | if (ret < 0) { |
| 75 | av_log(log_ctx, AV_LOG_ERROR, "Failed to read frame from file\n"); |
| 76 | goto end; |
| 77 | } |
| 78 | |
| 79 | ret = avcodec_decode_video2(codec_ctx, frame, &frame_decoded, &pkt); |
| 80 | if (ret < 0 || !frame_decoded) { |
| 81 | av_log(log_ctx, AV_LOG_ERROR, "Failed to decode image from file\n"); |
| 82 | if (ret >= 0) |
| 83 | ret = -1; |
| 84 | goto end; |
| 85 | } |
| 86 | |
| 87 | *w = frame->width; |
| 88 | *h = frame->height; |
| 89 | *pix_fmt = frame->format; |
| 90 | |
| 91 | if ((ret = av_image_alloc(data, linesize, *w, *h, *pix_fmt, 16)) < 0) |
| 92 | goto end; |
| 93 | ret = 0; |
| 94 | |
| 95 | av_image_copy(data, linesize, (const uint8_t **)frame->data, frame->linesize, *pix_fmt, *w, *h); |
| 96 | |
| 97 | end: |
| 98 | av_packet_unref(&pkt); |
| 99 | avcodec_close(codec_ctx); |
| 100 | avformat_close_input(&format_ctx); |
| 101 | av_frame_free(&frame); |
| 102 | av_dict_free(&opt); |
| 103 | |
| 104 | if (ret < 0) |
| 105 | av_log(log_ctx, AV_LOG_ERROR, "Error loading image file '%s'\n", filename); |
| 106 | return ret; |
| 107 | } |
| 108 |