224 lines
7.0 KiB
C
224 lines
7.0 KiB
C
/*
|
|
* Copyright (c) 2010 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.
|
|
*/
|
|
|
|
// Error Resiliency Features
|
|
// =========================
|
|
//
|
|
// This is an example demonstrating how to enable the error resiliency
|
|
// features of the codec.
|
|
//
|
|
// Configuration
|
|
// -------------
|
|
// Error resiliency is controlled by the g_error_resilient member of the
|
|
// configuration structure.
|
|
//
|
|
// Observing The Effects
|
|
// ---------------------
|
|
// Use the `decode_with_drops` example to decode with frames 5-10 dropped.
|
|
// Compare the output for a file encoded with this example versus one
|
|
// encoded with the `simple_encoder` example.
|
|
|
|
#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");
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static void write_ivf_file_header(FILE *outfile,
|
|
const vpx_codec_enc_cfg_t *cfg,
|
|
int frame_cnt) {
|
|
char header[32];
|
|
|
|
if(cfg->g_pass != VPX_RC_ONE_PASS && cfg->g_pass != VPX_RC_LAST_PASS)
|
|
return;
|
|
header[0] = 'D';
|
|
header[1] = 'K';
|
|
header[2] = 'I';
|
|
header[3] = 'F';
|
|
mem_put_le16(header+4, 0); /* version */
|
|
mem_put_le16(header+6, 32); /* headersize */
|
|
mem_put_le32(header+8, fourcc); /* headersize */
|
|
mem_put_le16(header+12, cfg->g_w); /* width */
|
|
mem_put_le16(header+14, cfg->g_h); /* height */
|
|
mem_put_le32(header+16, cfg->g_timebase.den); /* rate */
|
|
mem_put_le32(header+20, cfg->g_timebase.num); /* scale */
|
|
mem_put_le32(header+24, frame_cnt); /* length */
|
|
mem_put_le32(header+28, 0); /* unused */
|
|
|
|
(void) fwrite(header, 1, 32, outfile);
|
|
}
|
|
|
|
|
|
static void write_ivf_frame_header(FILE *outfile,
|
|
const vpx_codec_cx_pkt_t *pkt)
|
|
{
|
|
char header[12];
|
|
vpx_codec_pts_t pts;
|
|
|
|
if(pkt->kind != VPX_CODEC_CX_FRAME_PKT)
|
|
return;
|
|
|
|
pts = pkt->data.frame.pts;
|
|
mem_put_le32(header, (unsigned int)pkt->data.frame.sz);
|
|
mem_put_le32(header+4, pts&0xFFFFFFFF);
|
|
mem_put_le32(header+8, pts >> 32);
|
|
|
|
(void) fwrite(header, 1, 12, outfile);
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
FILE *infile, *outfile;
|
|
vpx_codec_ctx_t codec;
|
|
vpx_codec_enc_cfg_t cfg;
|
|
int frame_cnt = 0;
|
|
vpx_image_t raw;
|
|
vpx_codec_err_t res;
|
|
long width;
|
|
long height;
|
|
int frame_avail;
|
|
int got_data;
|
|
int flags = 0;
|
|
|
|
/* Open files */
|
|
if(argc!=5)
|
|
die("Usage: %s <width> <height> <infile> <outfile>\n", argv[0]);
|
|
width = strtol(argv[1], NULL, 0);
|
|
height = strtol(argv[2], NULL, 0);
|
|
if(width < 16 || width%2 || height <16 || height%2)
|
|
die("Invalid resolution: %ldx%ld", width, height);
|
|
if(!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, width, height, 1))
|
|
die("Faile to allocate image", width, height);
|
|
if(!(outfile = fopen(argv[4], "wb")))
|
|
die("Failed to open %s for writing", argv[4]);
|
|
|
|
printf("Using %s\n",vpx_codec_iface_name(interface));
|
|
|
|
/* Populate encoder configuration */
|
|
res = vpx_codec_enc_config_default(interface, &cfg, 0);
|
|
if(res) {
|
|
printf("Failed to get config: %s\n", vpx_codec_err_to_string(res));
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
/* Update the default configuration with our settings */
|
|
cfg.rc_target_bitrate = width * height * cfg.rc_target_bitrate
|
|
/ cfg.g_w / cfg.g_h;
|
|
cfg.g_w = width;
|
|
cfg.g_h = height;
|
|
|
|
/* Enable error resilient mode */
|
|
cfg.g_error_resilient = 1;
|
|
|
|
write_ivf_file_header(outfile, &cfg, 0);
|
|
|
|
|
|
/* Open input file for this encoding pass */
|
|
if(!(infile = fopen(argv[3], "rb")))
|
|
die("Failed to open %s for reading", argv[3]);
|
|
|
|
/* Initialize codec */
|
|
if(vpx_codec_enc_init(&codec, interface, &cfg, 0))
|
|
die_codec(&codec, "Failed to initialize encoder");
|
|
|
|
frame_avail = 1;
|
|
got_data = 0;
|
|
while(frame_avail || got_data) {
|
|
vpx_codec_iter_t iter = NULL;
|
|
const vpx_codec_cx_pkt_t *pkt;
|
|
|
|
frame_avail = read_frame(infile, &raw);
|
|
if(vpx_codec_encode(&codec, frame_avail? &raw : NULL, frame_cnt,
|
|
1, flags, VPX_DL_REALTIME))
|
|
die_codec(&codec, "Failed to encode frame");
|
|
got_data = 0;
|
|
while( (pkt = vpx_codec_get_cx_data(&codec, &iter)) ) {
|
|
got_data = 1;
|
|
switch(pkt->kind) {
|
|
case VPX_CODEC_CX_FRAME_PKT:
|
|
write_ivf_frame_header(outfile, pkt);
|
|
(void) fwrite(pkt->data.frame.buf, 1, pkt->data.frame.sz,
|
|
outfile);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
printf(pkt->kind == VPX_CODEC_CX_FRAME_PKT
|
|
&& (pkt->data.frame.flags & VPX_FRAME_IS_KEY)? "K":".");
|
|
fflush(stdout);
|
|
}
|
|
frame_cnt++;
|
|
}
|
|
printf("\n");
|
|
fclose(infile);
|
|
|
|
printf("Processed %d frames.\n",frame_cnt-1);
|
|
vpx_img_free(&raw);
|
|
if(vpx_codec_destroy(&codec))
|
|
die_codec(&codec, "Failed to destroy codec");
|
|
|
|
/* Try to rewrite the file header with the actual frame count */
|
|
if(!fseek(outfile, 0, SEEK_SET))
|
|
write_ivf_file_header(outfile, &cfg, frame_cnt-1);
|
|
fclose(outfile);
|
|
return EXIT_SUCCESS;
|
|
}
|