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// Copyright 2020 Joe Drago. All rights reserved.
// SPDX-License-Identifier: BSD-2-Clause
#include "avif/avif.h"
#include <inttypes.h>
#include <stdio.h>
#include <string.h>
int main(int argc, char * argv[])
{
if (argc != 2) {
fprintf(stderr, "avif_example_decode_file [filename.avif]\n");
return 1;
}
const char * inputFilename = argv[1];
int returnCode = 1;
avifRGBImage rgb;
memset(&rgb, 0, sizeof(rgb));
avifDecoder * decoder = avifDecoderCreate();
if (decoder == NULL) {
fprintf(stderr, "Memory allocation failure\n");
return 1;
}
// Override decoder defaults here (codecChoice, requestedSource, ignoreExif, ignoreXMP, etc)
avifResult result = avifDecoderSetIOFile(decoder, inputFilename);
if (result != AVIF_RESULT_OK) {
fprintf(stderr, "Cannot open file for read: %s\n", inputFilename);
goto cleanup;
}
result = avifDecoderParse(decoder);
if (result != AVIF_RESULT_OK) {
fprintf(stderr, "Failed to decode image: %s\n", avifResultToString(result));
goto cleanup;
}
// Now available:
// * All decoder->image information other than pixel data:
// * width, height, depth
// * transformations (pasp, clap, irot, imir)
// * color profile (icc, CICP)
// * metadata (Exif, XMP)
// * decoder->alphaPresent
// * number of total images in the AVIF (decoder->imageCount)
// * overall image sequence timing (including per-frame timing with avifDecoderNthImageTiming())
printf("Parsed AVIF: %ux%u (%ubpc)\n", decoder->image->width, decoder->image->height, decoder->image->depth);
while (avifDecoderNextImage(decoder) == AVIF_RESULT_OK) {
// Now available (for this frame):
// * All decoder->image YUV pixel data (yuvFormat, yuvPlanes, yuvRange, yuvChromaSamplePosition, yuvRowBytes)
// * decoder->image alpha data (alphaPlane, alphaRowBytes)
// * this frame's sequence timing
avifRGBImageSetDefaults(&rgb, decoder->image);
// Override YUV(A)->RGB(A) defaults here:
// depth, format, chromaUpsampling, avoidLibYUV, ignoreAlpha, alphaPremultiplied, etc.
// Alternative: set rgb.pixels and rgb.rowBytes yourself, which should match your chosen rgb.format
// Be sure to use uint16_t* instead of uint8_t* for rgb.pixels/rgb.rowBytes if (rgb.depth > 8)
result = avifRGBImageAllocatePixels(&rgb);
if (result != AVIF_RESULT_OK) {
fprintf(stderr, "Allocation of RGB samples failed: %s (%s)\n", inputFilename, avifResultToString(result));
goto cleanup;
}
result = avifImageYUVToRGB(decoder->image, &rgb);
if (result != AVIF_RESULT_OK) {
fprintf(stderr, "Conversion from YUV failed: %s (%s)\n", inputFilename, avifResultToString(result));
goto cleanup;
}
// Now available:
// * RGB(A) pixel data (rgb.pixels, rgb.rowBytes)
if (rgb.depth > 8) {
uint16_t * firstPixel = (uint16_t *)rgb.pixels;
printf(" * First pixel: RGBA(%u,%u,%u,%u)\n", firstPixel[0], firstPixel[1], firstPixel[2], firstPixel[3]);
} else {
uint8_t * firstPixel = rgb.pixels;
printf(" * First pixel: RGBA(%u,%u,%u,%u)\n", firstPixel[0], firstPixel[1], firstPixel[2], firstPixel[3]);
}
}
returnCode = 0;
cleanup:
avifRGBImageFreePixels(&rgb); // Only use in conjunction with avifRGBImageAllocatePixels()
avifDecoderDestroy(decoder);
return returnCode;
}
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