vp8_scalable_patterns.c

/*
 *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */


/*
 * This is an example demonstrating how to implement a multi-layer VP8
 * encoding scheme based on temporal scalability for video applications
 * that benefit from a scalable bitstream.
 */
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#define VPX_CODEC_DISABLE_COMPAT 1
#include "vpx/vpx_encoder.h"
#include "vpx/vp8cx.h"
#define interface (vpx_codec_vp8_cx())
#define fourcc    0x30385056

#define IVF_FILE_HDR_SZ  (32)
#define IVF_FRAME_HDR_SZ (12)

static void mem_put_le16(char *mem, unsigned int val) {
    mem[0] = val;
    mem[1] = val>>8;
}

static void mem_put_le32(char *mem, unsigned int val) {
    mem[0] = val;
    mem[1] = val>>8;
    mem[2] = val>>16;
    mem[3] = val>>24;
}

static void die(const char *fmt, ...) {
    va_list ap;

    va_start(ap, fmt);
    vprintf(fmt, ap);
    if(fmt[strlen(fmt)-1] != '\n')
        printf("\n");
    exit(EXIT_FAILURE);
}

static void die_codec(vpx_codec_ctx_t *ctx, const char *s) {
    const char *detail = vpx_codec_error_detail(ctx);

    printf("%s: %s\n", s, vpx_codec_error(ctx));
    if(detail)
        printf("    %s\n",detail);
    exit(EXIT_FAILURE);
}

static int read_frame(FILE *f, vpx_image_t *img) {
    size_t nbytes, to_read;
    int    res = 1;

    to_read = img->w*img->h*3/2;
    nbytes = fread(img->planes[0], 1, to_read, f);
    if(nbytes != to_read) {
        res = 0;
        if(nbytes > 0)
            printf("Warning: Read partial frame. Check your width & height!\n");