Index: source/libvpx/examples/vp9_lossless_encoder.c |
=================================================================== |
--- source/libvpx/examples/vp9_lossless_encoder.c (revision 0) |
+++ source/libvpx/examples/vp9_lossless_encoder.c (revision 0) |
@@ -0,0 +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; |
+} |