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/*
* Copyright (c) 2012 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.
*/
#ifndef TEST_IVF_VIDEO_SOURCE_H_
#define TEST_IVF_VIDEO_SOURCE_H_
#include <cstdio>
#include <cstdlib>
#include <new>
#include <string>
#include "test/video_source.h"
namespace libvpx_test {
const unsigned int kCodeBufferSize = 256 * 1024;
const unsigned int kIvfFileHdrSize = 32;
const unsigned int kIvfFrameHdrSize = 12;
static unsigned int MemGetLe32(const uint8_t *mem) {
return (mem[3] << 24) | (mem[2] << 16) | (mem[1] << 8) | (mem[0]);
}
// This class extends VideoSource to allow parsing of ivf files,
// so that we can do actual file decodes.
class IVFVideoSource : public CompressedVideoSource {
public:
explicit IVFVideoSource(const std::string &file_name)
: file_name_(file_name), input_file_(NULL), compressed_frame_buf_(NULL),
frame_sz_(0), frame_(0), end_of_file_(false) {}
virtual ~IVFVideoSource() {
delete[] compressed_frame_buf_;
if (input_file_) fclose(input_file_);
}
virtual void Init() {
// Allocate a buffer for read in the compressed video frame.
compressed_frame_buf_ = new uint8_t[libvpx_test::kCodeBufferSize];
ASSERT_TRUE(compressed_frame_buf_ != NULL)
<< "Allocate frame buffer failed";
}
virtual void Begin() {
input_file_ = OpenTestDataFile(file_name_);
ASSERT_TRUE(input_file_ != NULL)
<< "Input file open failed. Filename: " << file_name_;
// Read file header
uint8_t file_hdr[kIvfFileHdrSize];
ASSERT_EQ(kIvfFileHdrSize, fread(file_hdr, 1, kIvfFileHdrSize, input_file_))
<< "File header read failed.";
// Check file header
ASSERT_TRUE(file_hdr[0] == 'D' && file_hdr[1] == 'K' &&
file_hdr[2] == 'I' && file_hdr[3] == 'F')
<< "Input is not an IVF file.";
FillFrame();
}
virtual void Next() {
++frame_;
FillFrame();
}
void FillFrame() {
ASSERT_TRUE(input_file_ != NULL);
uint8_t frame_hdr[kIvfFrameHdrSize];
// Check frame header and read a frame from input_file.
if (fread(frame_hdr, 1, kIvfFrameHdrSize, input_file_) !=
kIvfFrameHdrSize) {
end_of_file_ = true;
} else {
end_of_file_ = false;
frame_sz_ = MemGetLe32(frame_hdr);
ASSERT_LE(frame_sz_, kCodeBufferSize)
<< "Frame is too big for allocated code buffer";
ASSERT_EQ(frame_sz_,
fread(compressed_frame_buf_, 1, frame_sz_, input_file_))
<< "Failed to read complete frame";
}
}
virtual const uint8_t *cxdata() const {
return end_of_file_ ? NULL : compressed_frame_buf_;
}
virtual size_t frame_size() const { return frame_sz_; }
virtual unsigned int frame_number() const { return frame_; }
protected:
std::string file_name_;
FILE *input_file_;
uint8_t *compressed_frame_buf_;
size_t frame_sz_;
unsigned int frame_;
bool end_of_file_;
};
} // namespace libvpx_test
#endif // TEST_IVF_VIDEO_SOURCE_H_