C++ (Cpp) get_target_format Examples

Example #1

File: image_writer.c Project: AddictXQ/mpv

bool write_image(struct mp_image *image, const struct image_writer_opts *opts,
                const char *filename, struct mp_log *log)
{
    struct image_writer_opts defs = image_writer_opts_defaults;
    if (!opts)
        opts = &defs;

    const struct img_writer *writer = get_writer(opts);
    struct image_writer_ctx ctx = { log, opts, writer, image->fmt };
    int destfmt = get_target_format(&ctx, image->imgfmt);

    struct mp_image *dst = convert_image(image, destfmt, log);
    if (!dst)
        return false;

    FILE *fp = fopen(filename, "wb");
    bool success = false;
    if (fp == NULL) {
        mp_err(log, "Error opening '%s' for writing!\n", filename);
    } else {
        success = writer->write(&ctx, dst, fp);
        success = !fclose(fp) && success;
        if (!success)
            mp_err(log, "Error writing file '%s'!\n", filename);
    }

    talloc_free(dst);
    return success;
}

Example #2

File: image_writer.c Project: jmglogow/mpv

struct mp_image *convert_image(struct mp_image *image, int destfmt,
                               struct mp_log *log)
{
    int d_w, d_h;
    mp_image_params_get_dsize(&image->params, &d_w, &d_h);

    struct mp_image_params p = {
        .imgfmt = destfmt,
        .w = d_w,
        .h = d_h,
        .p_w = 1,
        .p_h = 1,
    };
    mp_image_params_guess_csp(&p);

    // If RGB, just assume everything is correct.
    if (p.color.space != MP_CSP_RGB) {
        // Currently, assume what FFmpeg's jpg encoder needs.
        // Of course this works only for non-HDR (no HDR support in libswscale).
        p.color.levels = MP_CSP_LEVELS_PC;
        p.color.space = MP_CSP_BT_601;
        p.chroma_location = MP_CHROMA_CENTER;
        mp_image_params_guess_csp(&p);
    }

    if (mp_image_params_equal(&p, &image->params))
        return mp_image_new_ref(image);

    struct mp_image *dst = mp_image_alloc(p.imgfmt, p.w, p.h);
    if (!dst) {
        mp_err(log, "Out of memory.\n");
        return NULL;
    }
    mp_image_copy_attributes(dst, image);

    dst->params = p;

    if (mp_image_swscale(dst, image, mp_sws_hq_flags) < 0) {
        mp_err(log, "Error when converting image.\n");
        talloc_free(dst);
        return NULL;
    }

    return dst;
}

bool write_image(struct mp_image *image, const struct image_writer_opts *opts,
                const char *filename, struct mp_log *log)
{
    struct image_writer_opts defs = image_writer_opts_defaults;
    if (!opts)
        opts = &defs;

    struct image_writer_ctx ctx = { log, opts, image->fmt };
    bool (*write)(struct image_writer_ctx *, mp_image_t *, FILE *) = write_lavc;
    int destfmt = 0;

#if HAVE_JPEG
    if (opts->format == AV_CODEC_ID_MJPEG) {
        write = write_jpeg;
        destfmt = IMGFMT_RGB24;
    }
#endif

    if (!destfmt)
        destfmt = get_target_format(&ctx);

    struct mp_image *dst = convert_image(image, destfmt, log);
    if (!dst)
        return false;

    FILE *fp = fopen(filename, "wb");
    bool success = false;
    if (fp == NULL) {
        mp_err(log, "Error opening '%s' for writing!\n", filename);
    } else {
        success = write(&ctx, dst, fp);
        success = !fclose(fp) && success;
        if (!success)
            mp_err(log, "Error writing file '%s'!\n", filename);
    }

    talloc_free(dst);
    return success;
}

void dump_png(struct mp_image *image, const char *filename, struct mp_log *log)
{
    struct image_writer_opts opts = image_writer_opts_defaults;
    opts.format = AV_CODEC_ID_PNG;
    write_image(image, &opts, filename, log);
}