播放视频时同时播放音频

include/audioDecoder.h

@@ -0,0 +1,9 @@
+#ifndef AUDIODECODER_H
+#define AUDIODECODER_H
+#include <decodeParam.h>
+
+int RequestAudioFrame(AudioParam& param, uint8_t* audioBuffer, int bufSize);
+void audioCallback(void* userdata, uint8_t* stream, int len);
+void RequestAudioPacket(MediaParam& param);
+
+#endif

include/decodeParam.h

@@ -1,5 +1,6 @@
-#ifndef DECODER_H
+#ifndef DECODEPARAM_H
-#define DECODER_H
+#define DECODEPARAM_H
+
 extern "C" {
 #include "libavcodec/avcodec.h"
 #include "libavformat/avformat.h"
@@ -8,6 +9,8 @@ extern "C" {
 #include <queue>
 #include <condition_variable>
 #include <mutex>
+#include <chrono>
+using namespace std::literals::chrono_literals;
 
 template<typename T>
 	requires std::is_same_v<T, AVPacket> || std::is_same_v<T, AVFrame>
@@ -70,7 +73,8 @@ bool MediaQueue<T>::pop(T* item, bool block, bool quit) {
 				if (av_frame_ref(item, temp) < 0) {
 					return false;
 				}
-				av_frame_unref(temp);
+				av_frame_free(&temp);
+				delete temp;
 			}
 			queue.pop();
 			count--;
@@ -91,19 +95,48 @@ struct VideoParam
 {
 	MediaQueue<AVPacket> packetQueue;
 	MediaQueue<AVFrame> frameQueue;
-	AVFormatContext* fmtCtx;
 	AVCodecContext* codecCtx;
 	int width;
 	int height;
 	int videoStreamIndex;
-
+	AVStream* stream;
 	bool eof = false;
-
 	bool pause = false;
 	bool quit = false;
+	double totalTime = 0;
+	double currentTime = 0;
 };
 
-void InitDecoder(const char* filepath, VideoParam& param);
+struct AudioParam
-void RequestPacket(VideoParam& param);
+{
-void RequestFrame(VideoParam& param);
+	MediaQueue<AVPacket> packetQueue;
+	AVCodecContext* codecCtx;
+	AVStream* stream;
+	int audioStreamIndex;
+	static constexpr int MAX_BUFFER_SIZE = 192000;
+	uint8_t* buffer = new uint8_t[MAX_BUFFER_SIZE];
+	uint32_t bufferSize = 0;
+	uint32_t bufferIndex = 0;
+	bool eof = false;
+	bool pause = false;
+	bool isVideo = false;
+	bool quit = false;
+	double currentTime = 0;
+	double totalTime = 0;
+	double lastPts;
+
+	double getCurrentTime() const
+	{
+		const int diff = bufferSize - bufferIndex;
+		const int bytePreSec = codecCtx->sample_rate * codecCtx->ch_layout.nb_channels * 2;
+		return currentTime - static_cast<double>(diff) / bytePreSec;
+	}
+};
+
+struct MediaParam
+{
+	VideoParam videoParam;
+	AudioParam audioParam;
+	AVFormatContext* fmtCtx;
+};
 #endif

include/mediaDecoder.h

@@ -0,0 +1,9 @@
+#ifndef DECODER_H
+#define DECODER_H
+
+#include "decodeParam.h"
+
+void InitDecoder(const char* filepath, MediaParam& param);
+void RequestMediaPacket(MediaParam& param);
+void RequestVideoFrame(MediaParam& param);
+#endif

include/util.h

@@ -8,7 +8,7 @@
 #include <cstring>
 #include <string_view>
 enum class FileType {
-	MUSIC,
+	AUDIO,
 	VIDEO,
 	IMG,
 	ERRORTYPE
@@ -64,7 +64,7 @@ private:
 	}
 public:
 	static FileType GetFileType(const path& filepath) {
-		if (IsMusic(filepath)) return FileType::MUSIC;
+		if (IsMusic(filepath)) return FileType::AUDIO;
 		if (IsVideo(filepath)) return FileType::VIDEO;
 		if (IsImg(filepath))   return FileType::IMG;
 		return FileType::ERRORTYPE;

main.cc

@@ -1,15 +1,20 @@
 #include <iostream>
 #include <thread>
-#include <SDL2/SDL.h>
 #include <filesystem>
 #include <opencv2/opencv.hpp>
+#define SDL_MAIN_HANDLED
+#include <SDL2/SDL.h>
 
 #include "util.h"
-#include "decoder.h"
+#include "mediaDecoder.h"
 #include "shaderService.h"
 #include "shader.h"
+#include "audioDecoder.h"
 using std::cout;
 
+constexpr int SCREEN_WIDTH = 640;
+constexpr int SCREEN_HEIGHT = 480;
+
 struct OpenglVideoParam
 {
 	SDL_GLContext glContext;
@@ -17,14 +22,43 @@ struct OpenglVideoParam
 	unsigned int texs[3];
 };
 
-int InitVideo(SDL_Window*& window, const char* targetFilepath, VideoParam& videoParam, OpenglVideoParam& openglVideoParam, ShaderService*& shaderService)
+int InitAudio(SDL_Window* window, SDL_Renderer* renderer, const char* targetFilePath, MediaParam& param)
 {
-	InitDecoder(targetFilepath, videoParam);
+	if (!param.audioParam.isVideo)
+	{
+		InitDecoder(targetFilePath, param);
+		window = SDL_CreateWindow("mp", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
+		renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
+		std::jthread(RequestAudioPacket, std::ref(param)).detach();
+	}
+	SDL_AudioSpec des;
+	des.freq = param.audioParam.codecCtx->sample_rate;
+	des.channels = param.audioParam.codecCtx->ch_layout.nb_channels;
+	des.format = AUDIO_S16SYS;
+	des.samples = 1024;
+	des.silence = 0;
+	std::tuple<SDL_Window*, SDL_Renderer*, AudioParam*>* callbackParam = new std::tuple{ window, renderer, &(param.audioParam) };
+	des.userdata = callbackParam;
+	des.callback = audioCallback;
+	if (SDL_OpenAudio(&des, nullptr) < 0)
+	{
+		cout << SDL_GetError() << "\n";
+		return -1;
+	}
+	SDL_PauseAudio(0);
+	return 0;
+}
+
+int InitVideo(SDL_Window*& window, const char* targetFilepath, MediaParam& param, OpenglVideoParam& openglVideoParam, ShaderService*& shaderService)
+{
+	InitDecoder(targetFilepath, param);
+	param.audioParam.isVideo = true;
+	InitAudio(nullptr, nullptr, nullptr, param);
 	//FIX: when app exited, the fmtCtx was freed, so need notify decode thread to stop decode and exit.
-	std::jthread(RequestPacket, std::ref(videoParam)).detach();
+	std::jthread(RequestMediaPacket, std::ref(param)).detach();
-	std::jthread(RequestFrame, std::ref(videoParam)).detach();
+	std::jthread(RequestVideoFrame, std::ref(param)).detach();
-	const int client_width = videoParam.width / 2;
+	const int client_width = param.videoParam.width / 2;
-	const int client_height = videoParam.height / 2;
+	const int client_height = param.videoParam.height / 2;
 	window = SDL_CreateWindow(
 		"MP",
 		SDL_WINDOWPOS_UNDEFINED,
@@ -124,10 +158,10 @@ void InitImg(SDL_Window*& window, const char* filepath, SDL_Renderer*& renderer,
 	texture = SDL_CreateTextureFromSurface(renderer, surface);
 }
 
-void OpenglRenderVideo(VideoParam& videoParam, const OpenglVideoParam& openglVideoParam, ShaderService* shaderService)
+void OpenglRenderVideo(MediaParam& param, const OpenglVideoParam& openglVideoParam, ShaderService* shaderService)
 {
 	AVFrame* frame = av_frame_alloc();
-	videoParam.frameQueue.pop(frame, true, videoParam.quit);
+	param.videoParam.frameQueue.pop(frame, true, param.videoParam.quit);
 	// TODO: TIMER
 	glBindTexture(GL_TEXTURE_2D, openglVideoParam.texs[0]);
 	glPixelStoref(GL_UNPACK_ROW_LENGTH, static_cast<float>(frame->linesize[0]));
@@ -151,7 +185,7 @@ void OpenglRenderVideo(VideoParam& videoParam, const OpenglVideoParam& openglVid
 	glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, nullptr);
 }
 
-int main(int argc, char** const argv)
+int main(int argc, char** argv)
 {
 	// Check File
 	const char* targetFilepath = argv[1];
@@ -169,9 +203,8 @@ int main(int argc, char** const argv)
 
 	// INIT
 
-	int client_width, client_height;
 	SDL_Window* window = nullptr;
-	VideoParam videoParam{};
+	MediaParam mediaParam{};
 	OpenglVideoParam openglVideoParam{};
 	ShaderService* shaderService = nullptr;
 	SDL_Surface* surface = nullptr;
@@ -187,8 +220,8 @@ int main(int argc, char** const argv)
 	{
 	case FileType::VIDEO:
 	{
-		InitVideo(window, targetFilepath, videoParam, openglVideoParam, shaderService);
+		InitVideo(window, targetFilepath, mediaParam, openglVideoParam, shaderService);
-		const auto stream_frame_rate = videoParam.fmtCtx->streams[videoParam.videoStreamIndex]->avg_frame_rate;
+		const auto stream_frame_rate = mediaParam.videoParam.stream->avg_frame_rate;
 		framerate = static_cast<double>(stream_frame_rate.den) / stream_frame_rate.num;
 		break;
 	}
@@ -197,8 +230,9 @@ int main(int argc, char** const argv)
 		InitImg(window, targetFilepath, renderer, surface, texture);
 		break;
 	}
-	case FileType::MUSIC:
+	case FileType::AUDIO:
 	{
+		InitAudio(window, renderer, targetFilepath, mediaParam);
 		break;
 	}
 	case FileType::ERRORTYPE:
@@ -236,22 +270,23 @@ int main(int argc, char** const argv)
 		switch (fileType)
 		{
 		case FileType::VIDEO:
-			OpenglRenderVideo(videoParam, openglVideoParam, shaderService);
+			OpenglRenderVideo(mediaParam, openglVideoParam, shaderService);
 			SDL_GL_SwapWindow(window);
-			std::this_thread::sleep_until(current_time + std::chrono::milliseconds(30));
+			std::this_thread::sleep_until(current_time + std::chrono::milliseconds(static_cast<int>(framerate * 1000)));
 			current_time = std::chrono::system_clock::now();
-			cout << SDL_GetTicks() << '\n';
 			break;
 		case FileType::IMG:
 			RenderPicture(window, renderer, texture);
 			break;
+		case FileType::AUDIO:
+			break;
 		default:
 			break;
 		}
 	}
 
-	avcodec_close(videoParam.codecCtx);
+	avcodec_close(mediaParam.videoParam.codecCtx);
-	avformat_close_input(&(videoParam.fmtCtx));
+	avformat_close_input(&(mediaParam.fmtCtx));
 	SDL_GL_DeleteContext(openglVideoParam.glContext);
 	SDL_DestroyWindow(window);
 	SDL_Quit();

src/audioDecoder.cc

@@ -0,0 +1,160 @@
+#include "audioDecoder.h"
+
+#include <iostream>
+#include <SDL2/SDL_audio.h>
+#include <SDL2/SDL_stdinc.h>
+#include <SDL2/SDL.h>
+
+extern "C" {
+#include "libswresample/swresample.h"
+#include "fftw3.h"
+}
+
+int RequestAudioFrame(AudioParam& param, uint8_t* audioBuffer, int bufSize, SDL_Window* window, SDL_Renderer* renderer)
+{
+	AVFrame* frame = av_frame_alloc();
+	int dataSize = 0;
+	AVPacket packet;
+	SwrContext* swrCtx = nullptr;
+	if (param.quit) {
+		return -1;
+	}
+	if (!param.packetQueue.pop(&packet, true)) {
+		return -1;
+	}
+	if (packet.pts != AV_NOPTS_VALUE)
+	{
+		param.currentTime = av_q2d(param.stream->time_base) * packet.pts;
+	}
+	int ret = avcodec_send_packet(param.codecCtx, &packet);
+	if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
+		return -1;
+	}
+	ret = avcodec_receive_frame(param.codecCtx, frame);
+	if (ret < 0 && ret != AVERROR_EOF) {
+		av_frame_unref(frame);
+		return -1;
+	}
+	if (frame->best_effort_timestamp == AV_NOPTS_VALUE)
+	{
+		av_frame_unref(frame);
+		return -1;
+	}
+
+	if (frame->ch_layout.nb_channels > 0) {
+		av_channel_layout_default(&frame->ch_layout, frame->ch_layout.nb_channels);
+	}
+	int nbSamples = frame->nb_samples;
+	uint8_t* audioData = frame->data[0];
+	fftw_complex* fftwInput = static_cast<fftw_complex*>(fftw_malloc(sizeof(fftw_complex) * frame->nb_samples));
+	fftw_complex* fftwOutput = static_cast<fftw_complex*>(fftw_malloc(sizeof(fftw_complex) * frame->nb_samples));
+
+	for (int i = 0; i < nbSamples; i++)
+	{
+		fftwInput[i][0] = audioData[i];
+		fftwInput[i][1] = .0f;
+	}
+	fftw_plan fftwPlan = fftw_plan_dft_1d(nbSamples, fftwInput, fftwOutput, FFTW_FORWARD, FFTW_ESTIMATE);
+	fftw_execute(fftwPlan);
+
+	for (int i = 0; i < nbSamples; i++)
+	{
+		//double magnitude = sqrt(fftwOutput[i][0] * fftwOutput[i][0] + fftwOutput[i][1] * fftwOutput[i][1]);
+		//double phase = atan2(fftwOutput[i][1], fftwOutput[i][0]);
+		//std::cout << "mag: " << magnitude << "\n phase: " << phase << "\n";
+	}
+
+	constexpr AVSampleFormat dstFormat = AV_SAMPLE_FMT_S16;
+	swr_alloc_set_opts2(&swrCtx, &frame->ch_layout, dstFormat, frame->sample_rate, &frame->ch_layout, static_cast<AVSampleFormat>(frame->format), frame->sample_rate, 0, nullptr);
+	if (!swrCtx || swr_init(swrCtx) < 0) {
+		av_frame_unref(frame);
+		return -1;
+	}
+
+	const uint64_t dstNbSamples = av_rescale_rnd(swr_get_delay(swrCtx, frame->sample_rate) + frame->nb_samples, frame->sample_rate, frame->sample_rate, static_cast<AVRounding>(1));
+	const int nb = swr_convert(swrCtx, &audioBuffer, static_cast<int>(dstNbSamples), const_cast<const uint8_t**>(frame->data), frame->nb_samples);
+	dataSize = frame->ch_layout.nb_channels * nb * av_get_bytes_per_sample(dstFormat);
+
+	//TODO: render wave
+	if (!param.isVideo) {
+		SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0x00, 0xff);
+		SDL_RenderClear(renderer);
+		SDL_SetRenderDrawColor(renderer, 0xff, 0xff, 0xff, 0xff);
+		SDL_RenderDrawLine(renderer, 0, 0, 300, 300);
+		SDL_RenderPresent(renderer);
+	}
+	param.currentTime += static_cast<double>(dataSize) / (2 * (param.codecCtx->ch_layout.nb_channels) / param.codecCtx->sample_rate);
+	av_frame_free(&frame);
+	swr_free(&swrCtx);
+	return dataSize;
+}
+
+void audioCallback(void* userdata, uint8_t* stream, int len) {
+	const auto callbackParam = *static_cast<std::tuple<SDL_Window*, SDL_Renderer*, AudioParam*>*>(userdata);
+	const auto param = std::get<2>(callbackParam);
+	SDL_memset(stream, 0, len);
+	while (len > 0)
+	{
+		if (param->bufferIndex >= param->bufferSize)
+		{
+			const int audioSize = RequestAudioFrame(*param, param->buffer, sizeof(param->buffer), std::get<0>(callbackParam), std::get<1>(callbackParam));
+			if (audioSize < 0)
+			{
+				param->bufferSize = 0;
+				memset(param->buffer, 0, param->bufferSize);
+			}
+			else
+			{
+				param->bufferSize = audioSize;
+			}
+			param->bufferIndex = 0;
+		}
+		int len1 = static_cast<int>(param->bufferSize - param->bufferIndex);
+		if (len1 > len)
+			len1 = len;
+
+		SDL_MixAudio(stream, param->buffer + param->bufferIndex, len1, SDL_MIX_MAXVOLUME);
+		len -= len1;
+		stream += len1;
+		param->bufferIndex += len1;
+	}
+}
+
+void RequestAudioPacket(MediaParam& param) {
+	const auto& fmtCtx = param.fmtCtx;
+	const auto& audioStreamIndex = param.audioParam.audioStreamIndex;
+
+	AVPacket* packet = av_packet_alloc();
+
+	while (true) {
+		if (param.audioParam.packetQueue.isFill()) {
+			std::this_thread::sleep_for(100ms);
+			continue;
+		}
+		const int ret = av_read_frame(fmtCtx, packet);
+		if (param.audioParam.eof) {
+			std::this_thread::sleep_for(100ms);
+			av_packet_unref(packet);
+			return;
+		}
+		if (ret == 0) {
+			if (packet->stream_index == audioStreamIndex) {
+				param.audioParam.packetQueue.push(packet);
+				av_packet_unref(packet);
+			}
+			else if (ret == AVERROR_EOF)
+			{
+				param.audioParam.eof = true;
+				av_packet_unref(packet);
+				break;
+			}
+			else {
+				av_packet_unref(packet);
+			}
+		}
+		else if (param.fmtCtx->pb->error == 0) {
+			std::this_thread::sleep_for(100ms);
+		}
+	}
+	av_packet_unref(packet);
+}

src/mediaDecoder.cc

@@ -1,9 +1,9 @@
-#include "decoder.h"
+#include "mediaDecoder.h"
 #include <thread>
 #include <chrono>
 using namespace std::literals::chrono_literals;
 
-void InitDecoder(const char* filepath, VideoParam& param) {
+void InitDecoder(const char* filepath, MediaParam& param) {
 	AVFormatContext* fmtCtx = nullptr;
 	AVCodecContext* codecFmt = nullptr;
 	auto ret = avformat_open_input(&fmtCtx, filepath, NULL, NULL);
@@ -13,43 +13,60 @@ void InitDecoder(const char* filepath, VideoParam& param) {
 		const auto stream = fmtCtx->streams[i];
 		const auto codec = avcodec_find_decoder(stream->codecpar->codec_id);
 		if (codec->type == AVMEDIA_TYPE_VIDEO) {
-			param.videoStreamIndex = i;
+			param.videoParam.videoStreamIndex = i;
 			codecFmt = avcodec_alloc_context3(codec);
 			avcodec_parameters_to_context(codecFmt, stream->codecpar);
 			avcodec_open2(codecFmt, codec, nullptr);
+			param.videoParam.codecCtx = codecFmt;
+			param.videoParam.stream = stream;
+			param.videoParam.width = codecFmt->width;
+			param.videoParam.height = codecFmt->height;
+			param.videoParam.totalTime = av_q2d(stream->avg_frame_rate) * stream->duration;
+		}
+		else if (codec->type == AVMEDIA_TYPE_AUDIO)
+		{
+			param.audioParam.audioStreamIndex = i;
+			codecFmt = avcodec_alloc_context3(codec);
+			avcodec_parameters_to_context(codecFmt, stream->codecpar);
+			avcodec_open2(codecFmt, codec, nullptr);
+			param.audioParam.codecCtx = codecFmt;
+			param.audioParam.stream = stream;
 		}
 	}
-
-	param.codecCtx = codecFmt;
 	param.fmtCtx = fmtCtx;
-	param.width = codecFmt->width;
-	param.height = codecFmt->height;
 }
 
-void RequestPacket(VideoParam& param) {
+void RequestMediaPacket(MediaParam& param) {
 	const auto& fmtCtx = param.fmtCtx;
-	const auto& videoStreamIndex = param.videoStreamIndex;
+	const auto& videoStreamIndex = param.videoParam.videoStreamIndex;
-
+	const auto& audioStreamIndex = param.audioParam.audioStreamIndex;
 	AVPacket* packet = av_packet_alloc();
 
 	while (true) {
-		if (param.packetQueue.isFill()) {
+		if (param.videoParam.packetQueue.isFill()) {
 			std::this_thread::sleep_for(100ms);
 			continue;
 		}
+		//FIX:
 		const int ret = av_read_frame(fmtCtx, packet);
-		if (param.eof) {
+		if (param.videoParam.eof) {
 			std::this_thread::sleep_for(100ms);
+			av_packet_unref(packet);
 			return;
 		}
 		if (ret == 0) {
 			if (packet->stream_index == videoStreamIndex) {
-				param.packetQueue.push(packet);
+				param.videoParam.packetQueue.push(packet);
+				av_packet_unref(packet);
+			}
+			else if (packet->stream_index == audioStreamIndex)
+			{
+				param.audioParam.packetQueue.push(packet);
 				av_packet_unref(packet);
 			}
 			else if (ret == AVERROR_EOF)
 			{
-				param.eof = true;
+				param.videoParam.eof = true;
 				av_packet_unref(packet);
 				break;
 			}
@@ -64,21 +81,17 @@ void RequestPacket(VideoParam& param) {
 	av_packet_unref(packet);
 }
 
-void RequestFrame(VideoParam& param) {
+void RequestVideoFrame(MediaParam& param) {
-	const auto& fmtCtx = param.fmtCtx;
+	const auto& codecCtx = param.videoParam.codecCtx;
-	const auto& codecCtx = param.codecCtx;
-	const auto& videoStreamIndex = param.videoStreamIndex;
-
 	AVPacket* packet = av_packet_alloc();
 	AVFrame* frame = av_frame_alloc();
-	//frame->format = AV_PIX_FMT_YUV420P;
 	while (true) {
-		if (param.frameQueue.isFill()) {
+		if (param.videoParam.frameQueue.isFill()) {
 			std::this_thread::sleep_for(30ms);
 			continue;
 		}
-		if (!param.packetQueue.pop(packet, true, param.quit)) {
+		if (!param.videoParam.packetQueue.pop(packet, true, param.videoParam.quit)) {
-			if (param.quit)
+			if (param.videoParam.quit)
 			{
 				av_packet_unref(packet);
 				av_frame_unref(frame);
@@ -96,8 +109,11 @@ void RequestFrame(VideoParam& param) {
 		{
 			continue;
 		}
-		param.frameQueue.push(frame);
+		param.videoParam.frameQueue.push(frame);
+		auto time_duration = av_q2d(param.videoParam.stream->time_base);
+		auto pts = frame->best_effort_timestamp;
 		av_frame_unref(frame);
+		av_packet_unref(packet);
 	}
 }
 

todo.txt

@@ -1,5 +1,6 @@
 bug:
     1. 退出时异常
+    2. ДЪґжР№В¶
 
 todo:
     1. 添加音频播放