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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include <stdlib.h>
#include <string.h>
#include "./ivfdec.h"
#include "./video_reader.h"
#include "aom_ports/mem_ops.h"
static const char *const kIVFSignature = "DKIF";
struct AvxVideoReaderStruct {
AvxVideoInfo info;
FILE *file;
uint8_t *buffer;
size_t buffer_size;
size_t frame_size;
};
AvxVideoReader *aom_video_reader_open(const char *filename) {
char header[32];
AvxVideoReader *reader = NULL;
FILE *const file = fopen(filename, "rb");
if (!file) return NULL; // Can't open file
if (fread(header, 1, 32, file) != 32) return NULL; // Can't read file header
if (memcmp(kIVFSignature, header, 4) != 0)
return NULL; // Wrong IVF signature
if (mem_get_le16(header + 4) != 0) return NULL; // Wrong IVF version
reader = (AvxVideoReader *)calloc(1, sizeof(*reader));
if (!reader) return NULL; // Can't allocate AvxVideoReader
reader->file = file;
reader->info.codec_fourcc = mem_get_le32(header + 8);
reader->info.frame_width = mem_get_le16(header + 12);
reader->info.frame_height = mem_get_le16(header + 14);
reader->info.time_base.numerator = mem_get_le32(header + 16);
reader->info.time_base.denominator = mem_get_le32(header + 20);
return reader;
}
void aom_video_reader_close(AvxVideoReader *reader) {
if (reader) {
fclose(reader->file);
free(reader->buffer);
free(reader);
}
}
int aom_video_reader_read_frame(AvxVideoReader *reader) {
return !ivf_read_frame(reader->file, &reader->buffer, &reader->frame_size,
&reader->buffer_size);
}
const uint8_t *aom_video_reader_get_frame(AvxVideoReader *reader,
size_t *size) {
if (size) *size = reader->frame_size;
return reader->buffer;
}
const AvxVideoInfo *aom_video_reader_get_info(AvxVideoReader *reader) {
return &reader->info;
}
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