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 <stdlib.h>
12
13 #include "./ivfenc.h"
14 #include "./video_writer.h"
15 #include "vpx/vpx_encoder.h"
16
17 struct VpxVideoWriterStruct {
18 VpxVideoInfo info;
19 FILE *file;
20 int frame_count;
21 };
22
write_header(FILE * file,const VpxVideoInfo * info,int frame_count)23 static void write_header(FILE *file, const VpxVideoInfo *info,
24 int frame_count) {
25 struct vpx_codec_enc_cfg cfg;
26 cfg.g_w = info->frame_width;
27 cfg.g_h = info->frame_height;
28 cfg.g_timebase.num = info->time_base.numerator;
29 cfg.g_timebase.den = info->time_base.denominator;
30
31 ivf_write_file_header(file, &cfg, info->codec_fourcc, frame_count);
32 }
33
vpx_video_writer_open(const char * filename,VpxContainer container,const VpxVideoInfo * info)34 VpxVideoWriter *vpx_video_writer_open(const char *filename,
35 VpxContainer container,
36 const VpxVideoInfo *info) {
37 if (container == kContainerIVF) {
38 VpxVideoWriter *writer = NULL;
39 FILE *const file = fopen(filename, "wb");
40 if (!file)
41 return NULL;
42
43 writer = malloc(sizeof(*writer));
44 if (!writer)
45 return NULL;
46
47 writer->frame_count = 0;
48 writer->info = *info;
49 writer->file = file;
50
51 write_header(writer->file, info, 0);
52
53 return writer;
54 }
55
56 return NULL;
57 }
58
vpx_video_writer_close(VpxVideoWriter * writer)59 void vpx_video_writer_close(VpxVideoWriter *writer) {
60 if (writer) {
61 // Rewriting frame header with real frame count
62 rewind(writer->file);
63 write_header(writer->file, &writer->info, writer->frame_count);
64
65 fclose(writer->file);
66 free(writer);
67 }
68 }
69
vpx_video_writer_write_frame(VpxVideoWriter * writer,const uint8_t * buffer,size_t size,int64_t pts)70 int vpx_video_writer_write_frame(VpxVideoWriter *writer,
71 const uint8_t *buffer, size_t size,
72 int64_t pts) {
73 ivf_write_frame_header(writer->file, pts, size);
74 if (fwrite(buffer, 1, size, writer->file) != size)
75 return 0;
76
77 ++writer->frame_count;
78
79 return 1;
80 }
81