2 * Copyright (c) 2014 The WebM project authors. All Rights Reserved.
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.
15 #include "./video_reader.h"
17 #include "vpx_ports/mem_ops.h"
19 static const char *const kIVFSignature = "DKIF";
21 struct VpxVideoReaderStruct {
29 VpxVideoReader *vpx_video_reader_open(const char *filename) {
31 VpxVideoReader *reader = NULL;
32 FILE *const file = fopen(filename, "rb");
34 fprintf(stderr, "%s can't be opened.\n", filename); // Can't open file
38 if (fread(header, 1, 32, file) != 32) {
39 fprintf(stderr, "File header on %s can't be read.\n",
40 filename); // Can't read file header
43 if (memcmp(kIVFSignature, header, 4) != 0) {
44 fprintf(stderr, "The IVF signature on %s is wrong.\n",
45 filename); // Wrong IVF signature
49 if (mem_get_le16(header + 4) != 0) {
50 fprintf(stderr, "%s uses the wrong IVF version.\n",
51 filename); // Wrong IVF version
56 reader = calloc(1, sizeof(*reader));
60 "Can't allocate VpxVideoReader\n"); // Can't allocate VpxVideoReader
66 reader->info.codec_fourcc = mem_get_le32(header + 8);
67 reader->info.frame_width = mem_get_le16(header + 12);
68 reader->info.frame_height = mem_get_le16(header + 14);
69 reader->info.time_base.numerator = mem_get_le32(header + 16);
70 reader->info.time_base.denominator = mem_get_le32(header + 20);
75 void vpx_video_reader_close(VpxVideoReader *reader) {
83 int vpx_video_reader_read_frame(VpxVideoReader *reader) {
84 return !ivf_read_frame(reader->file, &reader->buffer, &reader->frame_size,
85 &reader->buffer_size);
88 const uint8_t *vpx_video_reader_get_frame(VpxVideoReader *reader,
90 if (size) *size = reader->frame_size;
92 return reader->buffer;
95 const VpxVideoInfo *vpx_video_reader_get_info(VpxVideoReader *reader) {