9cdaa3d72e
Change-Id: I6fdcea0e0faf42386dd2b8f972a3b3fb2c21b2c7
267 lines
8.1 KiB
C
267 lines
8.1 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.
|
|
*/
|
|
|
|
// Two Pass Encoder
|
|
// ================
|
|
//
|
|
// This is an example of a two pass encoder loop. It takes an input file in
|
|
// YV12 format, passes it through the encoder twice, and writes the compressed
|
|
// frames to disk in IVF format. It builds upon the simple_encoder example.
|
|
//
|
|
// Twopass Variables
|
|
// -----------------
|
|
// Twopass mode needs to track the current pass number and the buffer of
|
|
// statistics packets.
|
|
//
|
|
// Updating The Configuration
|
|
// ---------------------------------
|
|
// In two pass mode, the configuration has to be updated on each pass. The
|
|
// statistics buffer is passed on the last pass.
|
|
//
|
|
// Encoding A Frame
|
|
// ----------------
|
|
// Encoding a frame in two pass mode is identical to the simple encoder
|
|
// example, except the deadline is set to VPX_DL_BEST_QUALITY to get the
|
|
// best quality possible. VPX_DL_GOOD_QUALITY could also be used.
|
|
//
|
|
//
|
|
// Processing Statistics Packets
|
|
// -----------------------------
|
|
// Each packet of type `VPX_CODEC_CX_FRAME_PKT` contains the encoded data
|
|
// for this frame. We write a IVF frame header, followed by the raw data.
|
|
//
|
|
//
|
|
// Pass Progress Reporting
|
|
// -----------------------------
|
|
// It's sometimes helpful to see when each pass completes.
|
|
//
|
|
//
|
|
// Clean-up
|
|
// -----------------------------
|
|
// Destruction of the encoder instance must be done on each pass. The
|
|
// raw image should be destroyed at the end as usual.
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "vpx/vpx_encoder.h"
|
|
|
|
#include "./tools_common.h"
|
|
#include "./video_writer.h"
|
|
|
|
static const char *exec_name;
|
|
|
|
void usage_exit() {
|
|
fprintf(stderr, "Usage: %s <codec> <width> <height> <infile> <outfile>\n",
|
|
exec_name);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
static int get_frame_stats(vpx_codec_ctx_t *ctx,
|
|
const vpx_image_t *img,
|
|
vpx_codec_pts_t pts,
|
|
unsigned int duration,
|
|
vpx_enc_frame_flags_t flags,
|
|
unsigned int deadline,
|
|
vpx_fixed_buf_t *stats) {
|
|
int got_pkts = 0;
|
|
vpx_codec_iter_t iter = NULL;
|
|
const vpx_codec_cx_pkt_t *pkt = NULL;
|
|
const vpx_codec_err_t res = vpx_codec_encode(ctx, img, pts, duration, flags,
|
|
deadline);
|
|
if (res != VPX_CODEC_OK)
|
|
die_codec(ctx, "Failed to get frame stats.");
|
|
|
|
while ((pkt = vpx_codec_get_cx_data(ctx, &iter)) != NULL) {
|
|
got_pkts = 1;
|
|
|
|
if (pkt->kind == VPX_CODEC_STATS_PKT) {
|
|
const uint8_t *const pkt_buf = pkt->data.twopass_stats.buf;
|
|
const size_t pkt_size = pkt->data.twopass_stats.sz;
|
|
stats->buf = realloc(stats->buf, stats->sz + pkt_size);
|
|
memcpy((uint8_t *)stats->buf + stats->sz, pkt_buf, pkt_size);
|
|
stats->sz += pkt_size;
|
|
}
|
|
}
|
|
|
|
return got_pkts;
|
|
}
|
|
|
|
static int encode_frame(vpx_codec_ctx_t *ctx,
|
|
const vpx_image_t *img,
|
|
vpx_codec_pts_t pts,
|
|
unsigned int duration,
|
|
vpx_enc_frame_flags_t flags,
|
|
unsigned int deadline,
|
|
VpxVideoWriter *writer) {
|
|
int got_pkts = 0;
|
|
vpx_codec_iter_t iter = NULL;
|
|
const vpx_codec_cx_pkt_t *pkt = NULL;
|
|
const vpx_codec_err_t res = vpx_codec_encode(ctx, img, pts, duration, flags,
|
|
deadline);
|
|
if (res != VPX_CODEC_OK)
|
|
die_codec(ctx, "Failed to encode frame.");
|
|
|
|
while ((pkt = vpx_codec_get_cx_data(ctx, &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 (!vpx_video_writer_write_frame(writer, pkt->data.frame.buf,
|
|
pkt->data.frame.sz,
|
|
pkt->data.frame.pts))
|
|
die_codec(ctx, "Failed to write compressed frame.");
|
|
printf(keyframe ? "K" : ".");
|
|
fflush(stdout);
|
|
}
|
|
}
|
|
|
|
return got_pkts;
|
|
}
|
|
|
|
static vpx_fixed_buf_t pass0(vpx_image_t *raw,
|
|
FILE *infile,
|
|
const VpxInterface *encoder,
|
|
const vpx_codec_enc_cfg_t *cfg) {
|
|
vpx_codec_ctx_t codec;
|
|
int frame_count = 0;
|
|
vpx_fixed_buf_t stats = {NULL, 0};
|
|
|
|
if (vpx_codec_enc_init(&codec, encoder->codec_interface(), cfg, 0))
|
|
die_codec(&codec, "Failed to initialize encoder");
|
|
|
|
// Calculate frame statistics.
|
|
while (vpx_img_read(raw, infile)) {
|
|
++frame_count;
|
|
get_frame_stats(&codec, raw, frame_count, 1, 0, VPX_DL_BEST_QUALITY,
|
|
&stats);
|
|
}
|
|
|
|
// Flush encoder.
|
|
while (get_frame_stats(&codec, NULL, frame_count, 1, 0,
|
|
VPX_DL_BEST_QUALITY, &stats)) {}
|
|
|
|
printf("Pass 0 complete. Processed %d frames.\n", frame_count);
|
|
if (vpx_codec_destroy(&codec))
|
|
die_codec(&codec, "Failed to destroy codec.");
|
|
|
|
return stats;
|
|
}
|
|
|
|
static void pass1(vpx_image_t *raw,
|
|
FILE *infile,
|
|
const char *outfile_name,
|
|
const VpxInterface *encoder,
|
|
const vpx_codec_enc_cfg_t *cfg) {
|
|
VpxVideoInfo info = {
|
|
encoder->fourcc,
|
|
cfg->g_w,
|
|
cfg->g_h,
|
|
{cfg->g_timebase.num, cfg->g_timebase.den}
|
|
};
|
|
VpxVideoWriter *writer = NULL;
|
|
vpx_codec_ctx_t codec;
|
|
int frame_count = 0;
|
|
|
|
writer = vpx_video_writer_open(outfile_name, kContainerIVF, &info);
|
|
if (!writer)
|
|
die("Failed to open %s for writing", outfile_name);
|
|
|
|
if (vpx_codec_enc_init(&codec, encoder->codec_interface(), cfg, 0))
|
|
die_codec(&codec, "Failed to initialize encoder");
|
|
|
|
// Encode frames.
|
|
while (vpx_img_read(raw, infile)) {
|
|
++frame_count;
|
|
encode_frame(&codec, raw, frame_count, 1, 0, VPX_DL_BEST_QUALITY, writer);
|
|
}
|
|
|
|
// Flush encoder.
|
|
while (encode_frame(&codec, NULL, -1, 1, 0, VPX_DL_BEST_QUALITY, writer)) {}
|
|
|
|
printf("\n");
|
|
|
|
if (vpx_codec_destroy(&codec))
|
|
die_codec(&codec, "Failed to destroy codec.");
|
|
|
|
vpx_video_writer_close(writer);
|
|
|
|
printf("Pass 1 complete. Processed %d frames.\n", frame_count);
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
FILE *infile = NULL;
|
|
int w, h;
|
|
vpx_codec_ctx_t codec;
|
|
vpx_codec_enc_cfg_t cfg;
|
|
vpx_image_t raw;
|
|
vpx_codec_err_t res;
|
|
vpx_fixed_buf_t stats;
|
|
|
|
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
|
|
const char *const codec_arg = argv[1];
|
|
const char *const width_arg = argv[2];
|
|
const char *const height_arg = argv[3];
|
|
const char *const infile_arg = argv[4];
|
|
const char *const outfile_arg = argv[5];
|
|
exec_name = argv[0];
|
|
|
|
if (argc != 6)
|
|
die("Invalid number of arguments.");
|
|
|
|
encoder = get_vpx_encoder_by_name(codec_arg);
|
|
if (!encoder)
|
|
die("Unsupported codec.");
|
|
|
|
w = strtol(width_arg, NULL, 0);
|
|
h = strtol(height_arg, NULL, 0);
|
|
|
|
if (w <= 0 || h <= 0 || (w % 2) != 0 || (h % 2) != 0)
|
|
die("Invalid frame size: %dx%d", w, h);
|
|
|
|
if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, w, h, 1))
|
|
die("Failed to allocate image", w, h);
|
|
|
|
printf("Using %s\n", vpx_codec_iface_name(encoder->codec_interface()));
|
|
|
|
// Configuration
|
|
res = vpx_codec_enc_config_default(encoder->codec_interface(), &cfg, 0);
|
|
if (res)
|
|
die_codec(&codec, "Failed to get default codec config.");
|
|
|
|
cfg.g_w = w;
|
|
cfg.g_h = h;
|
|
cfg.g_timebase.num = 1;
|
|
cfg.g_timebase.den = fps;
|
|
cfg.rc_target_bitrate = bitrate;
|
|
|
|
if (!(infile = fopen(infile_arg, "rb")))
|
|
die("Failed to open %s for reading", infile_arg);
|
|
|
|
// Pass 0
|
|
cfg.g_pass = VPX_RC_FIRST_PASS;
|
|
stats = pass0(&raw, infile, encoder, &cfg);
|
|
|
|
// Pass 1
|
|
rewind(infile);
|
|
cfg.g_pass = VPX_RC_LAST_PASS;
|
|
cfg.rc_twopass_stats_in = stats;
|
|
pass1(&raw, infile, outfile_arg, encoder, &cfg);
|
|
free(stats.buf);
|
|
|
|
vpx_img_free(&raw);
|
|
fclose(infile);
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|