examples/twopass_encoder.c - aom - Git at Google

 /*
  * Copyright (c) 2016, Alliance for Open Media. All rights reserved
  *
  * This source code is subject to the terms of the BSD 2 Clause License and
  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
  * was not distributed with this source code in the LICENSE file, you can
  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
  * Media Patent License 1.0 was not distributed with this source code in the
  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
  */

 // 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.
 //
 // Processing Statistics Packets
 // -----------------------------
 // Each packet of type `AOM_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 "aom/aom_encoder.h"
 #include "aom/aomcx.h"
 #include "common/tools_common.h"
 #include "common/video_writer.h"

 static const char *exec_name;

 void usage_exit(void) {
   fprintf(stderr,
           "Usage: %s <codec> <width> <height> <infile> <outfile> "
           "<limit(optional)>\n",
           exec_name);
   exit(EXIT_FAILURE);
 }

 static int get_frame_stats(aom_codec_ctx_t *ctx, const aom_image_t *img,
                            aom_codec_pts_t pts, unsigned int duration,
                            aom_enc_frame_flags_t flags,
                            aom_fixed_buf_t *stats) {
   int got_pkts = 0;
   aom_codec_iter_t iter = NULL;
   const aom_codec_cx_pkt_t *pkt = NULL;
   const aom_codec_err_t res = aom_codec_encode(ctx, img, pts, duration, flags);
   if (res != AOM_CODEC_OK) die_codec(ctx, "Failed to get frame stats.");

   while ((pkt = aom_codec_get_cx_data(ctx, &iter)) != NULL) {
     got_pkts = 1;

     if (pkt->kind == AOM_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);
       if (!stats->buf) die("Failed to allocate frame stats buffer.");
       memcpy((uint8_t *)stats->buf + stats->sz, pkt_buf, pkt_size);
       stats->sz += pkt_size;
     }
   }

   return got_pkts;
 }

 static int encode_frame(aom_codec_ctx_t *ctx, const aom_image_t *img,
                         aom_codec_pts_t pts, unsigned int duration,
                         aom_enc_frame_flags_t flags, AvxVideoWriter *writer) {
   int got_pkts = 0;
   aom_codec_iter_t iter = NULL;
   const aom_codec_cx_pkt_t *pkt = NULL;
   const aom_codec_err_t res = aom_codec_encode(ctx, img, pts, duration, flags);
   if (res != AOM_CODEC_OK) die_codec(ctx, "Failed to encode frame.");

   while ((pkt = aom_codec_get_cx_data(ctx, &iter)) != NULL) {
     got_pkts = 1;
     if (pkt->kind == AOM_CODEC_CX_FRAME_PKT) {
       const int keyframe = (pkt->data.frame.flags & AOM_FRAME_IS_KEY) != 0;

       if (!aom_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 aom_fixed_buf_t pass0(aom_image_t *raw, FILE *infile,
                              aom_codec_iface_t *encoder,
                              const aom_codec_enc_cfg_t *cfg, int limit) {
   aom_codec_ctx_t codec;
   int frame_count = 0;
   aom_fixed_buf_t stats = { NULL, 0 };

   if (aom_codec_enc_init(&codec, encoder, cfg, 0))
     die("Failed to initialize encoder");

   // Calculate frame statistics.
   while (aom_img_read(raw, infile) && frame_count < limit) {
     ++frame_count;
     get_frame_stats(&codec, raw, frame_count, 1, 0, &stats);
   }

   // Flush encoder.
   while (get_frame_stats(&codec, NULL, frame_count, 1, 0, &stats)) {
   }

   printf("Pass 0 complete. Processed %d frames.\n", frame_count);
   if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec.");

   return stats;
 }

 static void pass1(aom_image_t *raw, FILE *infile, const char *outfile_name,
                   aom_codec_iface_t *encoder, const aom_codec_enc_cfg_t *cfg,
                   int limit) {
   AvxVideoInfo info = { get_fourcc_by_aom_encoder(encoder),
                         cfg->g_w,
                         cfg->g_h,
                         { cfg->g_timebase.num, cfg->g_timebase.den },
                         0 };
   AvxVideoWriter *writer = NULL;
   aom_codec_ctx_t codec;
   int frame_count = 0;

   writer = aom_video_writer_open(outfile_name, kContainerIVF, &info);
   if (!writer) die("Failed to open %s for writing", outfile_name);

   if (aom_codec_enc_init(&codec, encoder, cfg, 0))
     die("Failed to initialize encoder");

   if (aom_codec_control(&codec, AOME_SET_CPUUSED, 2))
     die_codec(&codec, "Failed to set cpu-used");

   // Encode frames.
   while (aom_img_read(raw, infile) && frame_count < limit) {
     ++frame_count;
     encode_frame(&codec, raw, frame_count, 1, 0, writer);
   }

   // Flush encoder.
   while (encode_frame(&codec, NULL, -1, 1, 0, writer)) {
   }

   printf("\n");

   if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec.");

   aom_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;
   aom_codec_ctx_t codec;
   aom_codec_enc_cfg_t cfg;
   aom_image_t raw;
   aom_codec_err_t res;
   aom_fixed_buf_t stats;

   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];
   int limit = 0;
   exec_name = argv[0];

   if (argc < 6) die("Invalid number of arguments");

   if (argc > 6) limit = (int)strtol(argv[6], NULL, 0);

   if (limit == 0) limit = 100;

   aom_codec_iface_t *encoder = get_aom_encoder_by_short_name(codec_arg);
   if (!encoder) die("Unsupported codec.");

   w = (int)strtol(width_arg, NULL, 0);
   h = (int)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 (!aom_img_alloc(&raw, AOM_IMG_FMT_I420, w, h, 1))
     die("Failed to allocate image (%dx%d)", w, h);

   printf("Using %s\n", aom_codec_iface_name(encoder));

   // Configuration
   res = aom_codec_enc_config_default(encoder, &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 = AOM_RC_FIRST_PASS;
   stats = pass0(&raw, infile, encoder, &cfg, limit);

   // Pass 1
   rewind(infile);
   cfg.g_pass = AOM_RC_LAST_PASS;
   cfg.rc_twopass_stats_in = stats;
   pass1(&raw, infile, outfile_arg, encoder, &cfg, limit);
   free(stats.buf);

   aom_img_free(&raw);
   fclose(infile);

   return EXIT_SUCCESS;
 }
	/*
	* Copyright (c) 2016, Alliance for Open Media. All rights reserved
	*
	* This source code is subject to the terms of the BSD 2 Clause License and
	* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
	* was not distributed with this source code in the LICENSE file, you can
	* obtain it at www.aomedia.org/license/software. If the Alliance for Open
	* Media Patent License 1.0 was not distributed with this source code in the
	* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
	*/

	// 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.
	//
	// Processing Statistics Packets
	// -----------------------------
	// Each packet of type `AOM_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 "aom/aom_encoder.h"
	#include "aom/aomcx.h"
	#include "common/tools_common.h"
	#include "common/video_writer.h"

	static const char *exec_name;

	void usage_exit(void) {
	fprintf(stderr,
	"Usage: %s <codec> <width> <height> <infile> <outfile> "
	"<limit(optional)>\n",
	exec_name);
	exit(EXIT_FAILURE);
	}

	static int get_frame_stats(aom_codec_ctx_t ctx, const aom_image_t img,
	aom_codec_pts_t pts, unsigned int duration,
	aom_enc_frame_flags_t flags,
	aom_fixed_buf_t *stats) {
	int got_pkts = 0;
	aom_codec_iter_t iter = NULL;
	const aom_codec_cx_pkt_t *pkt = NULL;
	const aom_codec_err_t res = aom_codec_encode(ctx, img, pts, duration, flags);
	if (res != AOM_CODEC_OK) die_codec(ctx, "Failed to get frame stats.");

	while ((pkt = aom_codec_get_cx_data(ctx, &iter)) != NULL) {
	got_pkts = 1;

	if (pkt->kind == AOM_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);
	if (!stats->buf) die("Failed to allocate frame stats buffer.");
	memcpy((uint8_t *)stats->buf + stats->sz, pkt_buf, pkt_size);
	stats->sz += pkt_size;
	}
	}

	return got_pkts;
	}

	static int encode_frame(aom_codec_ctx_t ctx, const aom_image_t img,
	aom_codec_pts_t pts, unsigned int duration,
	aom_enc_frame_flags_t flags, AvxVideoWriter *writer) {
	int got_pkts = 0;
	aom_codec_iter_t iter = NULL;
	const aom_codec_cx_pkt_t *pkt = NULL;
	const aom_codec_err_t res = aom_codec_encode(ctx, img, pts, duration, flags);
	if (res != AOM_CODEC_OK) die_codec(ctx, "Failed to encode frame.");

	while ((pkt = aom_codec_get_cx_data(ctx, &iter)) != NULL) {
	got_pkts = 1;
	if (pkt->kind == AOM_CODEC_CX_FRAME_PKT) {
	const int keyframe = (pkt->data.frame.flags & AOM_FRAME_IS_KEY) != 0;

	if (!aom_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 aom_fixed_buf_t pass0(aom_image_t raw, FILE infile,
	aom_codec_iface_t *encoder,
	const aom_codec_enc_cfg_t *cfg, int limit) {
	aom_codec_ctx_t codec;
	int frame_count = 0;
	aom_fixed_buf_t stats = { NULL, 0 };

	if (aom_codec_enc_init(&codec, encoder, cfg, 0))
	die("Failed to initialize encoder");

	// Calculate frame statistics.
	while (aom_img_read(raw, infile) && frame_count < limit) {
	++frame_count;
	get_frame_stats(&codec, raw, frame_count, 1, 0, &stats);
	}

	// Flush encoder.
	while (get_frame_stats(&codec, NULL, frame_count, 1, 0, &stats)) {
	}

	printf("Pass 0 complete. Processed %d frames.\n", frame_count);
	if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec.");

	return stats;
	}

	static void pass1(aom_image_t raw, FILE infile, const char *outfile_name,
	aom_codec_iface_t encoder, const aom_codec_enc_cfg_t cfg,
	int limit) {
	AvxVideoInfo info = { get_fourcc_by_aom_encoder(encoder),
	cfg->g_w,
	cfg->g_h,
	{ cfg->g_timebase.num, cfg->g_timebase.den },
	0 };
	AvxVideoWriter *writer = NULL;
	aom_codec_ctx_t codec;
	int frame_count = 0;

	writer = aom_video_writer_open(outfile_name, kContainerIVF, &info);
	if (!writer) die("Failed to open %s for writing", outfile_name);

	if (aom_codec_enc_init(&codec, encoder, cfg, 0))
	die("Failed to initialize encoder");

	if (aom_codec_control(&codec, AOME_SET_CPUUSED, 2))
	die_codec(&codec, "Failed to set cpu-used");

	// Encode frames.
	while (aom_img_read(raw, infile) && frame_count < limit) {
	++frame_count;
	encode_frame(&codec, raw, frame_count, 1, 0, writer);
	}

	// Flush encoder.
	while (encode_frame(&codec, NULL, -1, 1, 0, writer)) {
	}

	printf("\n");

	if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec.");

	aom_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;
	aom_codec_ctx_t codec;
	aom_codec_enc_cfg_t cfg;
	aom_image_t raw;
	aom_codec_err_t res;
	aom_fixed_buf_t stats;

	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];
	int limit = 0;
	exec_name = argv[0];

	if (argc < 6) die("Invalid number of arguments");

	if (argc > 6) limit = (int)strtol(argv[6], NULL, 0);

	if (limit == 0) limit = 100;

	aom_codec_iface_t *encoder = get_aom_encoder_by_short_name(codec_arg);
	if (!encoder) die("Unsupported codec.");

	w = (int)strtol(width_arg, NULL, 0);
	h = (int)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 (!aom_img_alloc(&raw, AOM_IMG_FMT_I420, w, h, 1))
	die("Failed to allocate image (%dx%d)", w, h);

	printf("Using %s\n", aom_codec_iface_name(encoder));

	// Configuration
	res = aom_codec_enc_config_default(encoder, &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 = AOM_RC_FIRST_PASS;
	stats = pass0(&raw, infile, encoder, &cfg, limit);

	// Pass 1
	rewind(infile);
	cfg.g_pass = AOM_RC_LAST_PASS;
	cfg.rc_twopass_stats_in = stats;
	pass1(&raw, infile, outfile_arg, encoder, &cfg, limit);
	free(stats.buf);

	aom_img_free(&raw);
	fclose(infile);

	return EXIT_SUCCESS;
	}