mirror of
https://github.com/mickael-kerjean/filestash.git
synced 2025-11-01 02:43:35 +08:00
94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <libraw/libraw.h>
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#include "utils.h"
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#include "image_jpeg.h"
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#define BUF_SIZE 1024 * 8
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int raw_to_jpeg(int inputDesc, int outputDesc, int targetSize) {
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#ifdef HAS_DEBUG
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clock_t t;
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t = clock();
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#endif
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int status = 0;
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FILE* input = fdopen(inputDesc, "r");
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FILE* output = fdopen(outputDesc, "w");
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// STEP1: write input to a file as that's the only things libraw can open
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char fname_in[32] = "/tmp/filestash.XXXXXX";
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int _mkstemp_in = mkstemp(fname_in);
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if (!_mkstemp_in) {
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ERROR("mkstemp_in");
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status = 1;
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goto CLEANUP_AND_ABORT_A;
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}
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FILE* f_in = fdopen(_mkstemp_in, "w");
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if (!f_in) {
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ERROR("fdopen");
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status = 1;
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goto CLEANUP_AND_ABORT_B;
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}
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char content[BUF_SIZE];
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int read;
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while ((read = fread(content, sizeof(char), BUF_SIZE, input))) {
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fwrite(content, read, sizeof(char), f_in);
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}
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fclose(f_in);
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// STEP2: attempt at reading the raw file
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DEBUG("libraw init");
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libraw_data_t *raw = libraw_init(0);
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DEBUG("libraw open file");
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if (libraw_open_file(raw, fname_in)) {
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ERROR("libraw_open_file");
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status = 1;
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goto CLEANUP_AND_ABORT_C;
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}
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// STEP3: prepare target
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raw->params.output_tiff = 1;
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DEBUG("libraw unpack thumb");
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char fname_out[32] = "/tmp/filestash.XXXXXX";
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int _mkstemp_out = mkstemp(fname_out);
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if (!_mkstemp_out) {
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ERROR("mkstemp_out");
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status = 1;
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goto CLEANUP_AND_ABORT_C;
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}
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// STEP4: attempt at extracting our image
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if (!libraw_unpack_thumb(raw) && raw->thumbnail.tformat == LIBRAW_THUMBNAIL_JPEG) {
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DEBUG("has an embed thumbnail");
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if (libraw_dcraw_thumb_writer(raw, fname_out)) {
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ERROR("thumb_writer");
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status = 1;
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goto CLEANUP_AND_ABORT_D;
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}
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DEBUG("process thumbnail");
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FILE* f_out = fdopen(_mkstemp_out, "r");
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if (jpeg_to_jpeg(fileno(f_out), fileno(output), targetSize)) {
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ERROR("jpeg_to_jpeg");
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status = 1;
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fclose(f_out);
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goto CLEANUP_AND_ABORT_D;
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}
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DEBUG("process complete");
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fclose(f_out);
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goto CLEANUP_AND_ABORT_D;
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}
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status = 1;
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ERROR("not implemented - abort");
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CLEANUP_AND_ABORT_D:
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remove(fname_out);
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CLEANUP_AND_ABORT_C:
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libraw_close(raw);
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CLEANUP_AND_ABORT_B:
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remove(fname_in);
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CLEANUP_AND_ABORT_A:
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return status;
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}
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