+++ /dev/null
-/*
- * 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.
- */
-
-
-// VP8 Set Reference Frame
-// =======================
-//
-// This is an example demonstrating how to overwrite the VP8 encoder's
-// internal reference frame. In the sample we set the last frame to the
-// current frame. If this is done at a cut scene it will avoid a keyframe.
-// This technique could be used to bounce between two cameras.
-//
-// Note that the decoder would also have to set the reference frame to the
-// same value on the same frame, or the video will become corrupt.
-//
-// Usage
-// -----
-// This example adds a single argument to the `simple_encoder` example,
-// which specifies the frame number to update the reference frame on.
-// 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
-// ---------------------
-// Use the `simple_encoder` example to encode a sample with a cut scene.
-// Determine the frame number of the cut scene by looking for a generated
-// key-frame (indicated by a 'K'). Supply that frame number as an argument
-// to this example, and observe that no key-frame is generated.
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "vpx/vp8cx.h"
-#include "vpx/vpx_encoder.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>\n",
- exec_name);
- exit(EXIT_FAILURE);
-}
-
-static int encode_frame(vpx_codec_ctx_t *codec,
- vpx_image_t *img,
- int frame_index,
- 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(codec, img, frame_index, 1, 0,
- VPX_DL_GOOD_QUALITY);
- if (res != VPX_CODEC_OK)
- die_codec(codec, "Failed to encode frame");
-
- while ((pkt = vpx_codec_get_cx_data(codec, &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(codec, "Failed to write compressed frame");
- }
-
- printf(keyframe ? "K" : ".");
- fflush(stdout);
- }
- }
-
- return got_pkts;
-}
-
-int main(int argc, char **argv) {
- FILE *infile = NULL;
- vpx_codec_ctx_t codec = {0};
- vpx_codec_enc_cfg_t cfg = {0};
- int frame_count = 0;
- vpx_image_t raw;
- vpx_codec_err_t res;
- VpxVideoInfo info = {0};
- VpxVideoWriter *writer = NULL;
- const VpxInterface *encoder = NULL;
- int update_frame_num = 0;
- const int fps = 30; // TODO(dkovalev) add command line argument
- const int bitrate = 200; // kbit/s TODO(dkovalev) add command line argument
-
- exec_name = argv[0];
-
- if (argc != 6)
- die("Invalid number of arguments");
-
- // TODO(dkovalev): add vp9 support and rename the file accordingly
- encoder = get_vpx_encoder_by_name("vp8");
- if (!encoder)
- die("Unsupported codec.");
-
- update_frame_num = atoi(argv[5]);
- if (!update_frame_num)
- die("Couldn't parse frame number '%s'\n", argv[5]);
-
- info.codec_fourcc = encoder->fourcc;
- info.frame_width = strtol(argv[1], NULL, 0);
- info.frame_height = strtol(argv[2], 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(&codec, "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;
-
- writer = vpx_video_writer_open(argv[4], kContainerIVF, &info);
- if (!writer)
- die("Failed to open %s for writing.", argv[4]);
-
- if (!(infile = fopen(argv[3], "rb")))
- die("Failed to open %s for reading.", argv[3]);
-
- 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)) {
- if (frame_count + 1 == update_frame_num) {
- vpx_ref_frame_t ref;
- ref.frame_type = VP8_LAST_FRAME;
- ref.img = raw;
- if (vpx_codec_control(&codec, VP8_SET_REFERENCE, &ref))
- die_codec(&codec, "Failed to set reference frame");
- }
-
- encode_frame(&codec, &raw, frame_count++, writer);
- }
-
- // Flush encoder.
- while (encode_frame(&codec, NULL, -1, writer)) {}
-
- printf("\n");
- fclose(infile);
- printf("Processed %d frames.\n", frame_count);
-
- vpx_img_free(&raw);
- if (vpx_codec_destroy(&codec))
- die_codec(&codec, "Failed to destroy codec.");
-
- vpx_video_writer_close(writer);
-
- return EXIT_SUCCESS;
-}
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