WebM Codec SDK: vp9_lossless_encoder

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vp9_lossless_encoder
1 /*
2 * Copyright (c) 2014 The WebM project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14
15 #include "vpx/vpx_encoder.h"
16 #include "vpx/vp8cx.h"
17
18 #include "../tools_common.h"
19 #include "../video_writer.h"
20
21 static const char *exec_name;
22
23 void usage_exit(void) {
24 fprintf(stderr, "vp9_lossless_encoder: Example demonstrating VP9 lossless "
25 "encoding feature. Supports raw input only.\n");
26 fprintf(stderr, "Usage: %s <width> <height> <infile> <outfile>\n", exec_name);
27 exit(EXIT_FAILURE);
28 }
29
30 static int encode_frame(vpx_codec_ctx_t *codec,
31 vpx_image_t *img,
32 int frame_index,
33 int flags,
34 VpxVideoWriter *writer) {
35 int got_pkts = 0;
36 vpx_codec_iter_t iter = NULL;
37 const vpx_codec_cx_pkt_t *pkt = NULL;
38 const vpx_codec_err_t res = vpx_codec_encode(codec, img, frame_index, 1,
39 flags, VPX_DL_GOOD_QUALITY);
40 if (res != VPX_CODEC_OK)
41 die_codec(codec, "Failed to encode frame");
42
43 while ((pkt = vpx_codec_get_cx_data(codec, &iter)) != NULL) {
44 got_pkts = 1;
45
46 if (pkt->kind == VPX_CODEC_CX_FRAME_PKT) {
47 const int keyframe = (pkt->data.frame.flags & VPX_FRAME_IS_KEY) != 0;
48 if (!vpx_video_writer_write_frame(writer,
49 pkt->data.frame.buf,
50 pkt->data.frame.sz,
51 pkt->data.frame.pts)) {
52 die_codec(codec, "Failed to write compressed frame");
53 }
54 printf(keyframe ? "K" : ".");
55 fflush(stdout);
56 }
57 }
58
59 return got_pkts;
60 }
61
62 int main(int argc, char **argv) {
63 FILE *infile = NULL;
64 vpx_codec_ctx_t codec;
65 vpx_codec_enc_cfg_t cfg;
66 int frame_count = 0;
67 vpx_image_t raw;
68 vpx_codec_err_t res;
69 VpxVideoInfo info = {0};
70 VpxVideoWriter *writer = NULL;
71 const VpxInterface *encoder = NULL;
72 const int fps = 30;
73
74 exec_name = argv[0];
75
76 if (argc < 5)
77 die("Invalid number of arguments");
78
79 encoder = get_vpx_encoder_by_name("vp9");
80 if (!encoder)
81 die("Unsupported codec.");
82
83 info.codec_fourcc = encoder->fourcc;
84 info.frame_width = strtol(argv[1], NULL, 0);
85 info.frame_height = strtol(argv[2], NULL, 0);
86 info.time_base.numerator = 1;
87 info.time_base.denominator = fps;
88
89 if (info.frame_width <= 0 ||
90 info.frame_height <= 0 ||
91 (info.frame_width % 2) != 0 ||
92 (info.frame_height % 2) != 0) {
93 die("Invalid frame size: %dx%d", info.frame_width, info.frame_height);
94 }
95
96 if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, info.frame_width,
97 info.frame_height, 1)) {
98 die("Failed to allocate image.");
99 }
100
101 printf("Using %s\n", vpx_codec_iface_name(encoder->codec_interface()));
102
103 res = vpx_codec_enc_config_default(encoder->codec_interface(), &cfg, 0);
104 if (res)
105 die_codec(&codec, "Failed to get default codec config.");
106
107 cfg.g_w = info.frame_width;
108 cfg.g_h = info.frame_height;
109 cfg.g_timebase.num = info.time_base.numerator;
110 cfg.g_timebase.den = info.time_base.denominator;
111
112 writer = vpx_video_writer_open(argv[4], kContainerIVF, &info);
113 if (!writer)
114 die("Failed to open %s for writing.", argv[4]);
115
116 if (!(infile = fopen(argv[3], "rb")))
117 die("Failed to open %s for reading.", argv[3]);
118
119 if (vpx_codec_enc_init(&codec, encoder->codec_interface(), &cfg, 0))
120 die_codec(&codec, "Failed to initialize encoder");
121
122 if (vpx_codec_control_(&codec, VP9E_SET_LOSSLESS, 1))
123 die_codec(&codec, "Failed to use lossless mode");
124
125 // Encode frames.
126 while (vpx_img_read(&raw, infile)) {
127 encode_frame(&codec, &raw, frame_count++, 0, writer);
128 }
129
130 // Flush encoder.
131 while (encode_frame(&codec, NULL, -1, 0, writer)) {}
132
133 printf("\n");
134 fclose(infile);
135 printf("Processed %d frames.\n", frame_count);
136
137 vpx_img_free(&raw);
138 if (vpx_codec_destroy(&codec))
139 die_codec(&codec, "Failed to destroy codec.");
140
141 vpx_video_writer_close(writer);
142
143 return EXIT_SUCCESS;
144 }
vpx_image
Image Descriptor.
Definition: vpx_image.h:88
vpx_encoder.h
Describes the encoder algorithm interface to applications.
vpx_codec_iface_name
const char * vpx_codec_iface_name(vpx_codec_iface_t *iface)
Return the name for a given interface.
vpx_codec_enc_cfg::g_timebase
struct vpx_rational g_timebase
Stream timebase units.
Definition: vpx_encoder.h:397
vpx_rational::den
int den
Definition: vpx_encoder.h:261
vpx_codec_encode
vpx_codec_err_t vpx_codec_encode(vpx_codec_ctx_t *ctx, const vpx_image_t *img, vpx_codec_pts_t pts, unsigned long duration, vpx_enc_frame_flags_t flags, unsigned long deadline)
Encode a frame.
vpx_codec_enc_cfg
Encoder configuration structure.
Definition: vpx_encoder.h:314
vpx_codec_cx_pkt
Encoder output packet.
Definition: vpx_encoder.h:195
vpx_codec_cx_pkt::frame
struct vpx_codec_cx_pkt::@1::@2 frame
vpx_img_alloc
vpx_image_t * vpx_img_alloc(vpx_image_t *img, vpx_img_fmt_t fmt, unsigned int d_w, unsigned int d_h, unsigned int align)
Open a descriptor, allocating storage for the underlying image.
VPX_IMG_FMT_I420
Definition: vpx_image.h:56
vpx_codec_enc_cfg::g_w
unsigned int g_w
Width of the frame.
Definition: vpx_encoder.h:357
vpx_codec_enc_cfg::g_h
unsigned int g_h
Height of the frame.
Definition: vpx_encoder.h:367
vpx_codec_cx_pkt::kind
enum vpx_codec_cx_pkt_kind kind
Definition: vpx_encoder.h:196
VP9E_SET_LOSSLESS
Codec control function to set lossless encoding mode.
Definition: vp8cx.h:339
VPX_CODEC_OK
Operation completed without error.
Definition: vpx_codec.h:91
vpx_img_free
void vpx_img_free(vpx_image_t *img)
Close an image descriptor.
vpx_rational::num
int num
Definition: vpx_encoder.h:260
VPX_DL_GOOD_QUALITY
#define VPX_DL_GOOD_QUALITY
Definition: vpx_encoder.h:914
vp8cx.h
Provides definitions for using VP8 or VP9 encoder algorithm within the vpx Codec Interface.
vpx_codec_enc_init
#define vpx_codec_enc_init(ctx, iface, cfg, flags)
Convenience macro for vpx_codec_enc_init_ver()
Definition: vpx_encoder.h:813
vpx_codec_err_t
vpx_codec_err_t
Algorithm return codes.
Definition: vpx_codec.h:89
vpx_codec_get_cx_data
const vpx_codec_cx_pkt_t * vpx_codec_get_cx_data(vpx_codec_ctx_t *ctx, vpx_codec_iter_t *iter)
Encoded data iterator.
vpx_codec_cx_pkt::data
union vpx_codec_cx_pkt::@1 data
vpx_codec_enc_config_default
vpx_codec_err_t vpx_codec_enc_config_default(vpx_codec_iface_t *iface, vpx_codec_enc_cfg_t *cfg, unsigned int reserved)
Get a default configuration.
vpx_codec_control_
vpx_codec_err_t vpx_codec_control_(vpx_codec_ctx_t *ctx, int ctrl_id,...)
Control algorithm.
vpx_codec_destroy
vpx_codec_err_t vpx_codec_destroy(vpx_codec_ctx_t *ctx)
Destroy a codec instance.
VPX_FRAME_IS_KEY
#define VPX_FRAME_IS_KEY
Definition: vpx_encoder.h:130
vpx_codec_iter_t
const void * vpx_codec_iter_t
Iterator.
Definition: vpx_codec.h:188
VPX_CODEC_CX_FRAME_PKT
Definition: vpx_encoder.h:176
vpx_codec_ctx
Codec context structure.
Definition: vpx_codec.h:199