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https://git.eworm.de/cgit/extract-artwork
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79 lines
2 KiB
C
79 lines
2 KiB
C
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/*
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* (C) 2015 by Christian Hesse <mail@eworm.de>
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <libavformat/avformat.h>
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int main(int argc, char **argv) {
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unsigned int i, j;
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FILE * album_art;
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char * album_art_file = NULL;
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AVPacket pkt;
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AVFormatContext * pFormatCtx;
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if (argc < 2) {
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printf("usage: %s file1.mp3 [file2.mp3 ...]\n", argv[0]);
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return EXIT_FAILURE;
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}
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/* libav */
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av_register_all();
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/* only fatal messages from libav */
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av_log_set_level(AV_LOG_FATAL);
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pFormatCtx = avformat_alloc_context();
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for (i = 1; i < argc; i++) {
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if (avformat_open_input(&pFormatCtx, argv[i], NULL, NULL) != 0) {
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fprintf(stderr, "%s: failed to open file for reading", argv[i]);
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goto next;
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}
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/* only mp3 file contain artwork, so ignore others */
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if (strcmp(pFormatCtx->iformat->name, "mp3") != 0) {
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fprintf(stderr, "%s: not a mp3 file\n", argv[i]);
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goto next;
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}
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if (pFormatCtx->iformat->read_header(pFormatCtx) < 0) {
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fprintf(stderr, "%s: could not read the format header\n", argv[i]);
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goto next;
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}
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/* find the first attached picture, if available */
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for (j = 0; j < pFormatCtx->nb_streams; j++) {
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if (pFormatCtx->streams[j]->disposition & AV_DISPOSITION_ATTACHED_PIC) {
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pkt = pFormatCtx->streams[j]->attached_pic;
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album_art_file = malloc(strlen(argv[i]) + 9);
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sprintf(album_art_file, "%s.%03u.jpg", argv[i], j);
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printf("%s: found artwork, writing to file %s\n", argv[i], album_art_file);
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if ((album_art = fopen(album_art_file, "wb")) == NULL)
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fprintf(stderr, "%s: failed to open file for writing\n", album_art_file);
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if (fwrite(pkt.data, pkt.size, 1, album_art) != 1)
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fprintf(stderr, "%s: failed to write to file\n", album_art_file);
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fclose(album_art);
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free(album_art_file);
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}
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}
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next:
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avformat_close_input(&pFormatCtx);
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}
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avformat_free_context(pFormatCtx);
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return EXIT_SUCCESS;
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}
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// vim: set syntax=c:
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