Function avifDecoderNthImageTiming

src/read.c:7064–7098

}

avifResult avifDecoderNthImageTiming(const avifDecoder * decoder, uint32_t frameIndex, avifImageTiming * outTiming)
{
    if (!decoder->data) {
        // Nothing has been parsed yet
        return AVIF_RESULT_NO_CONTENT;
    }

    if ((frameIndex > INT_MAX) || ((int)frameIndex >= decoder->imageCount)) {
        // Impossible index
        return AVIF_RESULT_NO_IMAGES_REMAINING;
    }

    if (!decoder->data->sourceSampleTable) {
        // There isn't any real timing associated with this decode, so
        // just hand back the defaults chosen in avifDecoderReset().
        *outTiming = decoder->imageTiming;
        return AVIF_RESULT_OK;
    }

    outTiming->timescale = decoder->timescale;
    outTiming->ptsInTimescales = 0;
    for (uint32_t imageIndex = 0; imageIndex < frameIndex; ++imageIndex) {
        outTiming->ptsInTimescales += avifSampleTableGetImageDelta(decoder->data->sourceSampleTable, imageIndex);
    }
    outTiming->durationInTimescales = avifSampleTableGetImageDelta(decoder->data->sourceSampleTable, frameIndex);

    if (outTiming->timescale > 0) {
        outTiming->pts = (double)outTiming->ptsInTimescales / (double)outTiming->timescale;
        outTiming->duration = (double)outTiming->durationInTimescales / (double)outTiming->timescale;
    } else {
        outTiming->pts = 0.0;
        outTiming->duration = 0.0;
    }
    return AVIF_RESULT_OK;
}

avifResult avifDecoderNthImage(avifDecoder * decoder, uint32_t frameIndex)
{