ref: b49e9fb433620dff5b3f7045901d2c874cd647da
dir: /test/lru_frame_buffer_test.cc/
/*
* Copyright (c) 2013 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.
*/
#include <queue>
#include <string>
#include "test/codec_factory.h"
#include "test/decode_test_driver.h"
#include "test/ivf_video_source.h"
#include "test/md5_helper.h"
#include "test/util.h"
#include "test/webm_video_source.h"
namespace {
const int kVideoNameParam = 1;
const char *kLRUTestVectors[] = {
"vp90-2-02-size-lf-1920x1080.webm",
"vp90-2-05-resize.ivf",
};
// Callback used by libvpx to request the application to allocate a frame
// buffer of at least |new_size| in bytes.
int realloc_vp9_frame_buffer(void *user_priv, size_t new_size,
vpx_codec_frame_buffer_t *fb) {
(void)user_priv;
if (fb == NULL)
return -1;
delete [] fb->data;
fb->data = new uint8_t[new_size];
fb->size = new_size;
return 0;
}
// Class for testing libvpx is using the least recently
// used frame buffer when a new buffer is requested.
class LRUFrameBufferTest
: public ::libvpx_test::DecoderTest,
public ::libvpx_test::CodecTestWithParam<const char*> {
protected:
struct FrameBufferMD5Sum {
int frame_buffer_index;
vpx_image_t img;
std::string md5;
};
LRUFrameBufferTest()
: DecoderTest(GET_PARAM(::libvpx_test::kCodecFactoryParam)),
num_buffers_(0),
num_jitter_buffers_(0),
frame_buffers_(NULL) {}
virtual ~LRUFrameBufferTest() {
for (int i = 0; i < num_buffers_; ++i) {
delete [] frame_buffers_[i].data;
}
delete [] frame_buffers_;
}
virtual void PreDecodeFrameHook(
const libvpx_test::CompressedVideoSource &video,
libvpx_test::Decoder *decoder) {
// Use external buffers for testing jitter buffers.
if (num_jitter_buffers_ > 0 && video.frame_number() == 0) {
const int max_reference_buffers = 8;
// Add 1 for a work buffer.
num_buffers_ = max_reference_buffers + 1 + num_jitter_buffers_;
// Have libvpx use frame buffers we create.
frame_buffers_ = new vpx_codec_frame_buffer_t[num_buffers_];
memset(frame_buffers_, 0, sizeof(frame_buffers_[0]) * num_buffers_);
decoder->SetExternalFrameBuffers(frame_buffers_, num_buffers_,
realloc_vp9_frame_buffer, NULL);
}
// Turn on frame buffer LRU cache.
decoder->Control(VP9D_SET_FRAME_BUFFER_LRU_CACHE, 1);
}
virtual void DecompressedFrameHook(const vpx_image_t &img,
const unsigned int frame_number) {
const uint32_t ximg_y_plane = 0;
const uint8_t *const y_buffer = img.planes[ximg_y_plane];
// Find which external buffer contains the y_buffer.
int i = 0;
for (i = 0; i < num_buffers_; ++i) {
if (y_buffer >= frame_buffers_[i].data &&
y_buffer < (frame_buffers_[i].data + frame_buffers_[i].size)) {
break;
}
}
FrameBufferMD5Sum fb_md5;
fb_md5.frame_buffer_index = i;
fb_md5.img = img;
libvpx_test::MD5 md5;
md5.Add(&img);
fb_md5.md5 = md5.Get();
jitter_buffer_md5_sums_.push(fb_md5);
// Check to see if any of the reconstructed image changed.
if (jitter_buffer_md5_sums_.size() >
static_cast<size_t>(num_jitter_buffers_)) {
fb_md5 = jitter_buffer_md5_sums_.front();
libvpx_test::MD5 md5;
md5.Add(&fb_md5.img);
const std::string check_str = md5.Get();
ASSERT_EQ(fb_md5.md5, check_str);
jitter_buffer_md5_sums_.pop();
}
}
libvpx_test::CompressedVideoSource *OpenCompressedFile(
const std::string &filename) {
if (filename.substr(filename.length() - 3, 3) == "ivf") {
return new libvpx_test::IVFVideoSource(filename);
} else if (filename.substr(filename.length() - 4, 4) == "webm") {
return new libvpx_test::WebMVideoSource(filename);
}
return NULL;
}
void set_num_jitter_buffers(int num_buffers) {
num_jitter_buffers_ = num_buffers;
}
private:
// Total number of external frame buffers.
int num_buffers_;
int num_jitter_buffers_;
// External frame buffers used by libvpx.
vpx_codec_frame_buffer_t *frame_buffers_;
// Save the md5 checksums for later comparison.
std::queue<FrameBufferMD5Sum> jitter_buffer_md5_sums_;
};
// This test runs through a set of test vectors, and decodes them.
// Libvpx will call into the application to allocate a frame buffer when
// needed. The md5 checksums are computed for each frame after it is
// decoded and stored to be checked later. After a jitter frame buffer
// has expired, the md5 checksum is computed again for the expired jitter
// buffer frame and checked against the md5 checksum after the frame was
// decoded. If md5 checksums match, then the test is passed. Otherwise,
// the test failed.
TEST_P(LRUFrameBufferTest, CheckLRUOneJitterBuffer) {
const std::string filename = GET_PARAM(kVideoNameParam);
set_num_jitter_buffers(1);
libvpx_test::CompressedVideoSource *const video =
OpenCompressedFile(filename);
video->Init();
// Decode frame, and check the md5 matching.
ASSERT_NO_FATAL_FAILURE(RunLoop(video));
delete video;
}
TEST_P(LRUFrameBufferTest, CheckLRUFourJitterBuffers) {
const std::string filename = GET_PARAM(kVideoNameParam);
set_num_jitter_buffers(4);
libvpx_test::CompressedVideoSource *const video =
OpenCompressedFile(filename);
video->Init();
// Decode frame, and check the md5 matching.
ASSERT_NO_FATAL_FAILURE(RunLoop(video));
delete video;
}
TEST_P(LRUFrameBufferTest, CheckLRUEightJitterBuffers) {
const std::string filename = GET_PARAM(kVideoNameParam);
set_num_jitter_buffers(8);
libvpx_test::CompressedVideoSource *const video =
OpenCompressedFile(filename);
video->Init();
// Decode frame, and check the md5 matching.
ASSERT_NO_FATAL_FAILURE(RunLoop(video));
delete video;
}
VP9_INSTANTIATE_TEST_CASE(LRUFrameBufferTest,
::testing::ValuesIn(kLRUTestVectors));
} // namespace