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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stddef.h>
#include <stdint.h>
#include <cstring>
#include "base/bind.h"
#include "base/files/memory_mapped_file.h"
#include "base/logging.h"
#include "base/macros.h"
#include "media/base/audio_decoder_config.h"
#include "media/base/media.h"
#include "media/base/media_util.h"
#include "media/base/test_data_util.h"
#include "media/base/video_decoder_config.h"
#include "media/ffmpeg/ffmpeg_common.h"
#include "media/filters/ffmpeg_glue.h"
#include "media/filters/in_memory_url_protocol.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace media {
class FFmpegCommonTest : public testing::Test {
public:
FFmpegCommonTest() {
FFmpegGlue::InitializeFFmpeg();
}
~FFmpegCommonTest() override{};
};
uint8_t kExtraData[5] = {0x00, 0x01, 0x02, 0x03, 0x04};
template <typename T>
void TestConfigConvertExtraData(
AVStream* stream,
T* decoder_config,
const base::Callback<bool(const AVStream*, T*)>& converter_fn) {
// Should initially convert.
EXPECT_TRUE(converter_fn.Run(stream, decoder_config));
// Store orig to let FFmpeg free whatever it allocated.
AVCodecParameters* codec_parameters = stream->codecpar;
uint8_t* orig_extradata = codec_parameters->extradata;
int orig_extradata_size = codec_parameters->extradata_size;
// Valid combination: extra_data = nullptr && size = 0.
codec_parameters->extradata = nullptr;
codec_parameters->extradata_size = 0;
EXPECT_TRUE(converter_fn.Run(stream, decoder_config));
EXPECT_EQ(static_cast<size_t>(codec_parameters->extradata_size),
decoder_config->extra_data().size());
// Valid combination: extra_data = non-nullptr && size > 0.
codec_parameters->extradata = &kExtraData[0];
codec_parameters->extradata_size = arraysize(kExtraData);
EXPECT_TRUE(converter_fn.Run(stream, decoder_config));
EXPECT_EQ(static_cast<size_t>(codec_parameters->extradata_size),
decoder_config->extra_data().size());
EXPECT_EQ(
0, memcmp(codec_parameters->extradata, &decoder_config->extra_data()[0],
decoder_config->extra_data().size()));
// Possible combination: extra_data = nullptr && size != 0, but the converter
// function considers this valid and having no extra_data, due to behavior of
// avcodec_parameters_to_context().
codec_parameters->extradata = nullptr;
codec_parameters->extradata_size = 10;
EXPECT_TRUE(converter_fn.Run(stream, decoder_config));
EXPECT_EQ(0UL, decoder_config->extra_data().size());
// Invalid combination: extra_data = non-nullptr && size = 0.
codec_parameters->extradata = &kExtraData[0];
codec_parameters->extradata_size = 0;
EXPECT_FALSE(converter_fn.Run(stream, decoder_config));
// Restore orig values for sane cleanup.
codec_parameters->extradata = orig_extradata;
codec_parameters->extradata_size = orig_extradata_size;
}
TEST_F(FFmpegCommonTest, AVStreamToDecoderConfig) {
// Open a file to get a real AVStreams from FFmpeg.
base::MemoryMappedFile file;
file.Initialize(GetTestDataFilePath("bear-320x240.webm"));
InMemoryUrlProtocol protocol(file.data(), file.length(), false);
FFmpegGlue glue(&protocol);
ASSERT_TRUE(glue.OpenContext());
AVFormatContext* format_context = glue.format_context();
// Find the audio and video streams and test valid and invalid combinations
// for extradata and extradata_size.
bool found_audio = false;
bool found_video = false;
for (size_t i = 0;
i < format_context->nb_streams && (!found_audio || !found_video);
++i) {
AVStream* stream = format_context->streams[i];
AVCodecParameters* codec_parameters = stream->codecpar;
AVMediaType codec_type = codec_parameters->codec_type;
if (codec_type == AVMEDIA_TYPE_AUDIO) {
if (found_audio)
continue;
found_audio = true;
AudioDecoderConfig audio_config;
TestConfigConvertExtraData(stream, &audio_config,
base::Bind(&AVStreamToAudioDecoderConfig));
} else if (codec_type == AVMEDIA_TYPE_VIDEO) {
if (found_video)
continue;
found_video = true;
VideoDecoderConfig video_config;
TestConfigConvertExtraData(stream, &video_config,
base::Bind(&AVStreamToVideoDecoderConfig));
} else {
// Only process audio/video.
continue;
}
}
ASSERT_TRUE(found_audio);
ASSERT_TRUE(found_video);
}
TEST_F(FFmpegCommonTest, TimeBaseConversions) {
const int64_t test_data[][5] = {
{1, 2, 1, 500000, 1}, {1, 3, 1, 333333, 1}, {1, 3, 2, 666667, 2},
};
for (size_t i = 0; i < arraysize(test_data); ++i) {
SCOPED_TRACE(i);
AVRational time_base;
time_base.num = static_cast<int>(test_data[i][0]);
time_base.den = static_cast<int>(test_data[i][1]);
base::TimeDelta time_delta =
ConvertFromTimeBase(time_base, test_data[i][2]);
EXPECT_EQ(time_delta.InMicroseconds(), test_data[i][3]);
EXPECT_EQ(ConvertToTimeBase(time_base, time_delta), test_data[i][4]);
}
}
TEST_F(FFmpegCommonTest, VerifyFormatSizes) {
for (AVSampleFormat format = AV_SAMPLE_FMT_NONE;
format < AV_SAMPLE_FMT_NB;
format = static_cast<AVSampleFormat>(format + 1)) {
std::vector<AVCodecID> codec_ids(1, AV_CODEC_ID_NONE);
if (format == AV_SAMPLE_FMT_S32)
codec_ids.push_back(AV_CODEC_ID_PCM_S24LE);
for (const auto& codec_id : codec_ids) {
SampleFormat sample_format =
AVSampleFormatToSampleFormat(format, codec_id);
if (sample_format == kUnknownSampleFormat) {
// This format not supported, so skip it.
continue;
}
// Have FFMpeg compute the size of a buffer of 1 channel / 1 frame
// with 1 byte alignment to make sure the sizes match.
int single_buffer_size =
av_samples_get_buffer_size(NULL, 1, 1, format, 1);
int bytes_per_channel = SampleFormatToBytesPerChannel(sample_format);
EXPECT_EQ(bytes_per_channel, single_buffer_size);
}
}
}
// Verifies there are no collisions of the codec name hashes used for UMA. Also
// includes code for updating the histograms XML.
TEST_F(FFmpegCommonTest, VerifyUmaCodecHashes) {
const AVCodecDescriptor* desc = avcodec_descriptor_next(nullptr);
std::map<int32_t, const char*> sorted_hashes;
while (desc) {
const int32_t hash = HashCodecName(desc->name);
// Ensure there are no collisions.
ASSERT_TRUE(sorted_hashes.find(hash) == sorted_hashes.end());
sorted_hashes[hash] = desc->name;
desc = avcodec_descriptor_next(desc);
}
// Add a none entry for when no codec is detected.
static const char kUnknownCodec[] = "none";
const int32_t hash = HashCodecName(kUnknownCodec);
ASSERT_TRUE(sorted_hashes.find(hash) == sorted_hashes.end());
sorted_hashes[hash] = kUnknownCodec;
// Uncomment the following lines to generate the "FFmpegCodecHashes" enum for
// usage in the histogram metrics file. While it regenerates *ALL* values, it
// should only be used to *ADD* values to histograms file. Never delete any
// values; diff should verify.
#if 0
printf("<enum name=\"FFmpegCodecHashes\" type=\"int\">\n");
for (const auto& kv : sorted_hashes)
printf(" <int value=\"%d\" label=\"%s\"/>\n", kv.first, kv.second);
printf("</enum>\n");
#endif
}
} // namespace media
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