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Merging force-keyframe example into simple_encoder. 

The only difference between two examples was usage of VPX_EFLAG_FORCE_KF
flag for frame encoding. Moving this functionality into simple_encoder
with additional command line option.

Change-Id: Ia3c4209be073eeb541d4ac6b41bd0f12812f6676
This commit is contained in:
Dmitry Kovalev 2014-03-03 17:48:06 -08:00
Родитель 6e079b7dd4
Коммит c3cd6b3e5c
4 изменённых файлов: 33 добавлений и 239 удалений
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2
.gitignore поставляемый
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@ -28,9 +28,7 @@
/examples/decode_to_md5
/examples/decode_with_drops
/examples/decode_with_partial_drops
/examples/error_resilient
/examples/example_xma
/examples/force_keyframe
/examples/postproc
/examples/simple_decoder
/examples/simple_encoder

3
examples.mk
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@ -123,9 +123,6 @@ twopass_encoder.SRCS += video_common.h
twopass_encoder.SRCS += video_writer.h video_writer.c
twopass_encoder.GUID = 73494FA6-4AF9-4763-8FBB-265C92402FD8
twopass_encoder.DESCRIPTION = Two-pass encoder loop
EXAMPLES-$(CONFIG_VP8_ENCODER) += force_keyframe.c
force_keyframe.GUID = 3C67CADF-029F-4C86-81F5-D6D4F51177F0
force_keyframe.DESCRIPTION = Force generation of keyframes
ifeq ($(CONFIG_DECODERS),yes)
EXAMPLES-$(CONFIG_VP8_ENCODER) += decode_with_drops.c
decode_with_drops.SRCS += ivfdec.h ivfdec.c

225
examples/force_keyframe.c
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@ -1,225 +0,0 @@
/*
* 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.
*/
// Forcing A Keyframe
// ==================
//
// This is an example demonstrating how to control placement of keyframes
// on a frame-by-frame basis.
//
// Configuration
// -------------
// Keyframes can be forced by setting the VPX_EFLAG_FORCE_KF bit of the
// flags passed to `vpx_codec_control()`. In this example, we force a
// keyframe every 8 frames.
//
// Observing The Effects
// ---------------------
// The output of the encoder examples shows a 'K' rather than a dot '.'
// when the encoder generates a keyframe. Note that every 8 frames a 'K'
// is output.
#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;
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;
if(!(frame_cnt & 7))
flags |= VPX_EFLAG_FORCE_KF;
else
flags &= ~VPX_EFLAG_FORCE_KF;
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;
}

42
examples/simple_encoder.c
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@ -64,6 +64,15 @@
// frame is shown for one frame-time in duration. The flags parameter is
// unused in this example. The deadline is set to VPX_DL_REALTIME to
// make the example run as quickly as possible.
// Forced Keyframes
// ----------------
// Keyframes can be forced by setting the VPX_EFLAG_FORCE_KF bit of the
// flags passed to `vpx_codec_control()`. In this example, we force a
// keyframe every <keyframe-interval> frames. Note, the output stream can
// contain additional keyframes beyond those that have been forced using the
// VPX_EFLAG_FORCE_KF flag because of automatic keyframe placement by the
// encoder.
//
// Processing The Encoded Data
// ---------------------------
@ -103,8 +112,8 @@ static const char *exec_name;
void usage_exit() {
fprintf(stderr,
"Usage: %s <codec> <width> <height> <infile> <outfile> "
"[<error-resilient>]\nSee comments in simple_encoder.c for more "
"information.\n",
"<keyframe-interval> [<error-resilient>]\nSee comments in "
"simple_encoder.c for more information.\n",
exec_name);
exit(EXIT_FAILURE);
}
@ -112,11 +121,12 @@ void usage_exit() {
static void encode_frame(vpx_codec_ctx_t *codec,
vpx_image_t *img,
int frame_index,
int flags,
VpxVideoWriter *writer) {
vpx_codec_iter_t iter = NULL;
const vpx_codec_cx_pkt_t *pkt = NULL;
const vpx_codec_err_t res = vpx_codec_encode(codec, img, frame_index, 1, 0,
VPX_DL_GOOD_QUALITY);
const vpx_codec_err_t res = vpx_codec_encode(codec, img, frame_index, 1,
flags, VPX_DL_GOOD_QUALITY);
if (res != VPX_CODEC_OK)
die_codec(codec, "Failed to encode frame");
@ -148,15 +158,20 @@ int main(int argc, char **argv) {
const VpxInterface *encoder = NULL;
const int fps = 30; // TODO(dkovalev) add command line argument
const int bitrate = 200; // kbit/s TODO(dkovalev) add command line argument
int keyframe_interval = 0;
// TODO(dkovalev): Add some simple command line parsing code to make the
// command line more flexible.
const char *codec_arg = NULL;
const char *width_arg = NULL;
const char *height_arg = NULL;
const char *infile_arg = NULL;
const char *outfile_arg = NULL;
const char *keyframe_interval_arg = NULL;
exec_name = argv[0];
if (argc < 6)
if (argc < 7)
die("Invalid number of arguments");
codec_arg = argv[1];
@ -164,6 +179,7 @@ int main(int argc, char **argv) {
height_arg = argv[3];
infile_arg = argv[4];
outfile_arg = argv[5];
keyframe_interval_arg = argv[6];
encoder = get_vpx_encoder_by_name(codec_arg);
if (!encoder)
@ -187,6 +203,10 @@ int main(int argc, char **argv) {
die("Failed to allocate image.");
}
keyframe_interval = strtol(keyframe_interval_arg, NULL, 0);
if (keyframe_interval < 0)
die("Invalid keyframe interval value.");
printf("Using %s\n", vpx_codec_iface_name(encoder->interface()));
res = vpx_codec_enc_config_default(encoder->interface(), &cfg, 0);
@ -198,7 +218,7 @@ int main(int argc, char **argv) {
cfg.g_timebase.num = info.time_base.numerator;
cfg.g_timebase.den = info.time_base.denominator;
cfg.rc_target_bitrate = bitrate;
cfg.g_error_resilient = argc > 6 ? strtol(argv[6], NULL, 0) : 0;
cfg.g_error_resilient = argc > 7 ? strtol(argv[7], NULL, 0) : 0;
writer = vpx_video_writer_open(outfile_arg, kContainerIVF, &info);
if (!writer)
@ -210,9 +230,13 @@ int main(int argc, char **argv) {
if (vpx_codec_enc_init(&codec, encoder->interface(), &cfg, 0))
die_codec(&codec, "Failed to initialize encoder");
while (vpx_img_read(&raw, infile))
encode_frame(&codec, &raw, frame_count++, writer);
encode_frame(&codec, NULL, -1, writer); // flush the encoder
while (vpx_img_read(&raw, infile)) {
int flags = 0;
if (keyframe_interval > 0 && frame_count % keyframe_interval == 0)
flags |= VPX_EFLAG_FORCE_KF;
encode_frame(&codec, &raw, frame_count++, flags, writer);
}
encode_frame(&codec, NULL, -1, 0, writer); // flush the encoder
printf("\n");
fclose(infile);