ref: cb1f97e8809c374d328456b6627cd7a2e4c80263
parent: 56b9c649a3e179580ea73b0a4b79e344ae574958
author: Dmitry Kovalev <[email protected]>
date: Tue Sep 9 14:51:41 EDT 2014
Adding lossless encoding example. Change-Id: Ib8498c3127c397b453beff140503b2aca0d11cfc
--- a/examples.mk
+++ b/examples.mk
@@ -149,6 +149,13 @@
simple_encoder.SRCS += video_writer.h video_writer.c
simple_encoder.GUID = 4607D299-8A71-4D2C-9B1D-071899B6FBFD
simple_encoder.DESCRIPTION = Simplified encoder loop
+EXAMPLES-$(CONFIG_VP9_ENCODER) += vp9_lossless_encoder.c
+vp9_lossless_encoder.SRCS += ivfenc.h ivfenc.c
+vp9_lossless_encoder.SRCS += tools_common.h tools_common.c
+vp9_lossless_encoder.SRCS += video_common.h
+vp9_lossless_encoder.SRCS += video_writer.h video_writer.c
+vp9_lossless_encoder.GUID = B63C7C88-5348-46DC-A5A6-CC151EF93366
+vp9_lossless_encoder.DESCRIPTION = Simplified lossless VP9 encoder
EXAMPLES-$(CONFIG_VP8_ENCODER) += twopass_encoder.c
twopass_encoder.SRCS += ivfenc.h ivfenc.c
twopass_encoder.SRCS += tools_common.h tools_common.c
--- /dev/null
+++ b/examples/vp9_lossless_encoder.c
@@ -1,0 +1,144 @@
+/*
+ * Copyright (c) 2014 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "vpx/vpx_encoder.h"
+#include "vpx/vp8cx.h"
+
+#include "./tools_common.h"
+#include "./video_writer.h"
+
+static const char *exec_name;
+
+void usage_exit() {+ fprintf(stderr, "vp9_lossless_encoder: Example demonstrating VP9 lossless "
+ "encoding feature. Supports raw input only.\n");
+ fprintf(stderr, "Usage: %s <width> <height> <infile> <outfile>\n", exec_name);
+ exit(EXIT_FAILURE);
+}
+
+static int encode_frame(vpx_codec_ctx_t *codec,
+ vpx_image_t *img,
+ int frame_index,
+ int flags,
+ 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,
+ flags, 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;
+ vpx_codec_enc_cfg_t cfg;
+ int frame_count = 0;
+ vpx_image_t raw;
+ vpx_codec_err_t res;
+ VpxVideoInfo info = {0};+ VpxVideoWriter *writer = NULL;
+ const VpxInterface *encoder = NULL;
+ const int fps = 30;
+
+ exec_name = argv[0];
+
+ if (argc < 5)
+ die("Invalid number of arguments");+
+ encoder = get_vpx_encoder_by_name("vp9");+ if (!encoder)
+ die("Unsupported codec.");+
+ 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;
+
+ 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");
+
+ if (vpx_codec_control_(&codec, VP9E_SET_LOSSLESS, 1))
+ die_codec(&codec, "Failed to use lossless mode");
+
+ // Encode frames.
+ while (vpx_img_read(&raw, infile)) {+ encode_frame(&codec, &raw, frame_count++, 0, writer);
+ }
+
+ // Flush encoder.
+ while (encode_frame(&codec, NULL, -1, 0, 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;
+}