Function get_image_format

libavdevice/android_camera.c:338–375

}

static int get_image_format(AVFormatContext *avctx, AImage *image)
{
    AndroidCameraCtx *ctx = avctx->priv_data;
    int32_t image_pixelstrides[2];
    uint8_t *image_plane_data[2];
    int plane_data_length[2];

    for (int i = 0; i < 2; i++) {
        AImage_getPlanePixelStride(image, i + 1, &image_pixelstrides[i]);
        AImage_getPlaneData(image, i + 1, &image_plane_data[i], &plane_data_length[i]);
    }

    if (image_pixelstrides[0] != image_pixelstrides[1]) {
        av_log(avctx, AV_LOG_ERROR,
               "Pixel strides of U and V plane should have been the same.\n");
        return AVERROR_EXTERNAL;
    }

    switch (image_pixelstrides[0]) {
        case 1:
            ctx->image_format = AV_PIX_FMT_YUV420P;
            break;
        case 2:
            if (image_plane_data[0] < image_plane_data[1]) {
                ctx->image_format = AV_PIX_FMT_NV12;
            } else {
                ctx->image_format = AV_PIX_FMT_NV21;
            }
            break;
        default:
            av_log(avctx, AV_LOG_ERROR,
                   "Unknown pixel stride %d of U and V plane, cannot determine camera image format.\n",
                   image_pixelstrides[0]);
            return AVERROR(ENOSYS);
    }

    return 0;
}

static void image_available(void *context, AImageReader *reader)
{