vp9cx_set_ref
/*
* Copyright (c) 2016 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.
*/
// VP9 Set Reference Frame
// ============================
//
// This is an example demonstrating how to overwrite the VP9 encoder's
// internal reference frame. In the sample we set the last frame to the
// current frame. This technique could be used to bounce between two cameras.
//
// The decoder would also have to set the reference frame to the same value
// on the same frame, or the video will become corrupt. The 'test_decode'
// variable is set to 1 in this example that tests if the encoder and decoder
// results are matching.
//
// Usage
// -----
// This example encodes a raw video. And the last argument passed in specifies
// the frame number to update the reference frame on. For example, run
// examples/vp9cx_set_ref 352 288 in.yuv out.ivf 4 30
// The parameter is parsed as follows:
//
//
// Extra Variables
// ---------------
// This example maintains the frame number passed on the command line
// in the `update_frame_num` variable.
//
//
// Configuration
// -------------
//
// The reference frame is updated on the frame specified on the command
// line.
//
// Observing The Effects
// ---------------------
// The encoder and decoder results should be matching when the same reference
// frame setting operation is done in both encoder and decoder. Otherwise,
// the encoder/decoder mismatch would be seen.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "vpx/vp8cx.h"
#include "vpx/vpx_decoder.h"
#include "vpx/vpx_encoder.h"
#include "vp9/common/vp9_common.h"
#include "./tools_common.h"
#include "./video_writer.h"
static const char *exec_name;
void usage_exit(void) {
fprintf(stderr,
"Usage: %s <width> <height> <infile> <outfile> "
"<frame> <limit(optional)>\n",
exec_name);
exit(EXIT_FAILURE);
}
static void testing_decode(vpx_codec_ctx_t *encoder, vpx_codec_ctx_t *decoder,
unsigned int frame_out, int *mismatch_seen) {
vpx_image_t enc_img, dec_img;
struct vp9_ref_frame ref_enc, ref_dec;
if (*mismatch_seen) return;
ref_enc.idx = 0;
ref_dec.idx = 0;
if (vpx_codec_control(encoder, VP9_GET_REFERENCE, &ref_enc))
die_codec(encoder, "Failed to get encoder reference frame");
enc_img = ref_enc.img;
if (vpx_codec_control(decoder, VP9_GET_REFERENCE, &ref_dec))
die_codec(decoder, "Failed to get decoder reference frame");
dec_img = ref_dec.img;
if (!compare_img(&enc_img, &dec_img)) {
int y[4], u[4], v[4];
*mismatch_seen = 1;
find_mismatch(&enc_img, &dec_img, y, u, v);
printf(
"Encode/decode mismatch on frame %d at"
" Y[%d, %d] {%d/%d},"
" U[%d, %d] {%d/%d},"
" V[%d, %d] {%d/%d}",
frame_out, y[0], y[1], y[2], y[3], u[0], u[1], u[2], u[3], v[0], v[1],
v[2], v[3]);
}
vpx_img_free(&enc_img);
vpx_img_free(&dec_img);
}
static int encode_frame(vpx_codec_ctx_t *ecodec, vpx_image_t *img,
unsigned int frame_in, VpxVideoWriter *writer,
int test_decode, vpx_codec_ctx_t *dcodec,
unsigned int *frame_out, int *mismatch_seen) {
int got_pkts = 0;
vpx_codec_iter_t iter = NULL;
const vpx_codec_cx_pkt_t *pkt = NULL;
int got_data;
const vpx_codec_err_t res =
vpx_codec_encode(ecodec, img, frame_in, 1, 0, VPX_DL_GOOD_QUALITY);
if (res != VPX_CODEC_OK) die_codec(ecodec, "Failed to encode frame");
got_data = 0;
while ((pkt = vpx_codec_get_cx_data(ecodec, &iter)) != NULL) {
got_pkts = 1;
if (pkt->kind == VPX_CODEC_CX_FRAME_PKT) {
const int keyframe = (pkt->data.frame.flags & VPX_FRAME_IS_KEY) != 0;
if (!(pkt->data.frame.flags & VPX_FRAME_IS_FRAGMENT)) {
*frame_out += 1;
}
if (!vpx_video_writer_write_frame(writer, pkt->data.frame.buf,
pkt->data.frame.sz,
pkt->data.frame.pts)) {
die_codec(ecodec, "Failed to write compressed frame");
}
printf(keyframe ? "K" : ".");
fflush(stdout);
got_data = 1;
// Decode 1 frame.
if (test_decode) {
if (vpx_codec_decode(dcodec, pkt->data.frame.buf,
(unsigned int)pkt->data.frame.sz, NULL, 0))
die_codec(dcodec, "Failed to decode frame.");
}
}
}
// Mismatch checking
if (got_data && test_decode) {
testing_decode(ecodec, dcodec, *frame_out, mismatch_seen);
}
return got_pkts;
}
int main(int argc, char **argv) {
FILE *infile = NULL;
// Encoder
vpx_codec_ctx_t ecodec;
vpx_codec_enc_cfg_t cfg;
unsigned int frame_in = 0;
vpx_image_t raw;
vpx_codec_err_t res;
VpxVideoInfo info;
VpxVideoWriter *writer = NULL;
const VpxInterface *encoder = NULL;
// Test encoder/decoder mismatch.
int test_decode = 1;
// Decoder
vpx_codec_ctx_t dcodec;
unsigned int frame_out = 0;
// The frame number to set reference frame on
unsigned int update_frame_num = 0;
int mismatch_seen = 0;
const int fps = 30;
const int bitrate = 500;
const char *width_arg = NULL;
const char *height_arg = NULL;
const char *infile_arg = NULL;
const char *outfile_arg = NULL;
const char *update_frame_num_arg = NULL;
unsigned int limit = 0;
vp9_zero(ecodec);
vp9_zero(cfg);
vp9_zero(info);
exec_name = argv[0];
if (argc < 6) die("Invalid number of arguments");
width_arg = argv[1];
height_arg = argv[2];
infile_arg = argv[3];
outfile_arg = argv[4];
update_frame_num_arg = argv[5];
encoder = get_vpx_encoder_by_name("vp9");
if (!encoder) die("Unsupported codec.");
update_frame_num = (unsigned int)strtoul(update_frame_num_arg, NULL, 0);
// In VP9, the reference buffers (cm->buffer_pool->frame_bufs[i].buf) are
// allocated while calling vpx_codec_encode(), thus, setting reference for
// 1st frame isn't supported.
if (update_frame_num <= 1) {
die("Couldn't parse frame number '%s'\n", update_frame_num_arg);
}
if (argc > 6) {
limit = (unsigned int)strtoul(argv[6], NULL, 0);
if (update_frame_num > limit)
die("Update frame number couldn't larger than limit\n");
}
info.codec_fourcc = encoder->fourcc;
info.frame_width = (int)strtol(width_arg, NULL, 0);
info.frame_height = (int)strtol(height_arg, NULL, 0);
info.time_base.numerator = 1;
info.time_base.denominator = fps;
if (info.frame_width <= 0 || info.frame_height <= 0 ||
(info.frame_width % 2) != 0 || (info.frame_height % 2) != 0) {
die("Invalid frame size: %dx%d", info.frame_width, info.frame_height);
}
if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, info.frame_width,
info.frame_height, 1)) {
die("Failed to allocate image.");
}
printf("Using %s\n", vpx_codec_iface_name(encoder->codec_interface()));
res = vpx_codec_enc_config_default(encoder->codec_interface(), &cfg, 0);
if (res) die_codec(&ecodec, "Failed to get default codec config.");
cfg.g_w = info.frame_width;
cfg.g_h = info.frame_height;
cfg.g_timebase.num = info.time_base.numerator;
cfg.g_timebase.den = info.time_base.denominator;
cfg.rc_target_bitrate = bitrate;
cfg.g_lag_in_frames = 3;
writer = vpx_video_writer_open(outfile_arg, kContainerIVF, &info);
if (!writer) die("Failed to open %s for writing.", outfile_arg);
if (!(infile = fopen(infile_arg, "rb")))
die("Failed to open %s for reading.", infile_arg);
if (vpx_codec_enc_init(&ecodec, encoder->codec_interface(), &cfg, 0))
die("Failed to initialize encoder");
// Disable alt_ref.
if (vpx_codec_control(&ecodec, VP8E_SET_ENABLEAUTOALTREF, 0))
die_codec(&ecodec, "Failed to set enable auto alt ref");
if (test_decode) {
const VpxInterface *decoder = get_vpx_decoder_by_name("vp9");
if (vpx_codec_dec_init(&dcodec, decoder->codec_interface(), NULL, 0))
die_codec(&dcodec, "Failed to initialize decoder.");
}
// Encode frames.
while (vpx_img_read(&raw, infile)) {
if (limit && frame_in >= limit) break;
if (update_frame_num > 1 && frame_out + 1 == update_frame_num) {
vpx_ref_frame_t ref;
ref.frame_type = VP8_LAST_FRAME;
ref.img = raw;
// Set reference frame in encoder.
if (vpx_codec_control(&ecodec, VP8_SET_REFERENCE, &ref))
die_codec(&ecodec, "Failed to set reference frame");
printf(" <SET_REF>");
// If set_reference in decoder is commented out, the enc/dec mismatch
// would be seen.
if (test_decode) {
if (vpx_codec_control(&dcodec, VP8_SET_REFERENCE, &ref))
die_codec(&dcodec, "Failed to set reference frame");
}
}
encode_frame(&ecodec, &raw, frame_in, writer, test_decode, &dcodec,
&frame_out, &mismatch_seen);
frame_in++;
if (mismatch_seen) break;
}
// Flush encoder.
if (!mismatch_seen)
while (encode_frame(&ecodec, NULL, frame_in, writer, test_decode, &dcodec,
&frame_out, &mismatch_seen)) {
}
printf("\n");
fclose(infile);
printf("Processed %d frames.\n", frame_out);
if (test_decode) {
if (!mismatch_seen)
printf("Encoder/decoder results are matching.\n");
else
printf("Encoder/decoder results are NOT matching.\n");
}
if (test_decode)
if (vpx_codec_destroy(&dcodec))
die_codec(&dcodec, "Failed to destroy decoder");
vpx_img_free(&raw);
if (vpx_codec_destroy(&ecodec))
die_codec(&ecodec, "Failed to destroy encoder.");
vpx_video_writer_close(writer);
return EXIT_SUCCESS;
}
vpx_codec_destroy
vpx_codec_err_t vpx_codec_destroy(vpx_codec_ctx_t *ctx)
Destroy a codec instance.
vpx_codec_iter_t
const void * vpx_codec_iter_t
Iterator.
Definition vpx_codec.h:190
vpx_codec_iface_name
const char * vpx_codec_iface_name(vpx_codec_iface_t *iface)
Return the name for a given interface.
vpx_codec_control
#define vpx_codec_control(ctx, id, data)
vpx_codec_control wrapper macro
Definition vpx_codec.h:411
vpx_codec_err_t
vpx_codec_err_t
Algorithm return codes.
Definition vpx_codec.h:93
VPX_CODEC_OK
@ VPX_CODEC_OK
Operation completed without error.
Definition vpx_codec.h:95
vpx_codec_decode
vpx_codec_err_t vpx_codec_decode(vpx_codec_ctx_t *ctx, const uint8_t *data, unsigned int data_sz, void *user_priv, long deadline)
Decode data.
vpx_codec_dec_init
#define vpx_codec_dec_init(ctx, iface, cfg, flags)
Convenience macro for vpx_codec_dec_init_ver()
Definition vpx_decoder.h:143
vpx_codec_enc_init
#define vpx_codec_enc_init(ctx, iface, cfg, flags)
Convenience macro for vpx_codec_enc_init_ver()
Definition vpx_encoder.h:900
VPX_DL_GOOD_QUALITY
#define VPX_DL_GOOD_QUALITY
deadline parameter analogous to VPx GOOD QUALITY mode.
Definition vpx_encoder.h:1006
vpx_codec_get_cx_data
const vpx_codec_cx_pkt_t * vpx_codec_get_cx_data(vpx_codec_ctx_t *ctx, vpx_codec_iter_t *iter)
Encoded data iterator.
VPX_FRAME_IS_KEY
#define VPX_FRAME_IS_KEY
Definition vpx_encoder.h:123
vpx_codec_enc_config_default
vpx_codec_err_t vpx_codec_enc_config_default(vpx_codec_iface_t *iface, vpx_codec_enc_cfg_t *cfg, unsigned int usage)
Get a default configuration.
vpx_codec_encode
vpx_codec_err_t vpx_codec_encode(vpx_codec_ctx_t *ctx, const vpx_image_t *img, vpx_codec_pts_t pts, unsigned long duration, vpx_enc_frame_flags_t flags, vpx_enc_deadline_t deadline)
Encode a frame.
VPX_FRAME_IS_FRAGMENT
#define VPX_FRAME_IS_FRAGMENT
this is a fragment of the encoded frame
Definition vpx_encoder.h:130
VPX_CODEC_CX_FRAME_PKT
@ VPX_CODEC_CX_FRAME_PKT
Definition vpx_encoder.h:155
VP8E_SET_ENABLEAUTOALTREF
@ VP8E_SET_ENABLEAUTOALTREF
Codec control function to enable automatic use of arf frames.
Definition vp8cx.h:182
VP8_SET_REFERENCE
@ VP8_SET_REFERENCE
pass in an external frame into decoder to be used as reference frame
Definition vp8.h:47
VP9_GET_REFERENCE
@ VP9_GET_REFERENCE
Definition vp8.h:55
vp9_ref_frame
VP9 specific reference frame data struct.
Definition vp8.h:110
vp9_ref_frame::idx
int idx
Definition vp8.h:111
vp9_ref_frame::img
vpx_image_t img
Definition vp8.h:112
vpx_codec_ctx
Codec context structure.
Definition vpx_codec.h:200
vpx_codec_cx_pkt
Encoder output packet.
Definition vpx_encoder.h:167
vpx_codec_cx_pkt::flags
vpx_codec_frame_flags_t flags
Definition vpx_encoder.h:177
vpx_codec_cx_pkt::kind
enum vpx_codec_cx_pkt_kind kind
Definition vpx_encoder.h:168
vpx_codec_cx_pkt::frame
struct vpx_codec_cx_pkt::@1::@2 frame
vpx_codec_cx_pkt::sz
size_t sz
Definition vpx_encoder.h:172
vpx_codec_cx_pkt::buf
void * buf
Definition vpx_encoder.h:171
vpx_codec_cx_pkt::pts
vpx_codec_pts_t pts
time stamp to show frame (in timebase units)
Definition vpx_encoder.h:174
vpx_codec_cx_pkt::data
union vpx_codec_cx_pkt::@1 data
vpx_codec_enc_cfg
Encoder configuration structure.
Definition vpx_encoder.h:276
vpx_codec_enc_cfg::g_h
unsigned int g_h
Height of the frame.
Definition vpx_encoder.h:321
vpx_codec_enc_cfg::g_w
unsigned int g_w
Width of the frame.
Definition vpx_encoder.h:312
vpx_codec_enc_cfg::g_timebase
struct vpx_rational g_timebase
Stream timebase units.
Definition vpx_encoder.h:351
vpx_codec_enc_cfg::g_lag_in_frames
unsigned int g_lag_in_frames
Allow lagged encoding.
Definition vpx_encoder.h:380
vpx_codec_enc_cfg::rc_target_bitrate
unsigned int rc_target_bitrate
Target data rate.
Definition vpx_encoder.h:470
vpx_image
Image Descriptor.
Definition vpx_image.h:76
vpx_rational::den
int den
Definition vpx_encoder.h:228
vpx_rational::num
int num
Definition vpx_encoder.h:227
vpx_ref_frame
reference frame data struct
Definition vp8.h:101
vpx_ref_frame::frame_type
vpx_ref_frame_type_t frame_type
Definition vp8.h:102
vpx_ref_frame::img
vpx_image_t img
Definition vp8.h:103
vp8cx.h
Provides definitions for using VP8 or VP9 encoder algorithm within the vpx Codec Interface.
vpx_decoder.h
Describes the decoder algorithm interface to applications.
vpx_encoder.h
Describes the encoder algorithm interface to applications.
vpx_img_alloc
vpx_image_t * vpx_img_alloc(vpx_image_t *img, vpx_img_fmt_t fmt, unsigned int d_w, unsigned int d_h, unsigned int align)
Open a descriptor, allocating storage for the underlying image.
VPX_IMG_FMT_I420
@ VPX_IMG_FMT_I420
Definition vpx_image.h:42
vpx_img_free
void vpx_img_free(vpx_image_t *img)
Close an image descriptor.