播放器新增支持音频:#945

2026-07-02 08:17:33 +08:00 · 2021-06-29 17:44:35 +08:00
parent 66f28f52b4
commit 1b674a6ac2
128 changed files with 1033 additions and 63696 deletions
--- a/player/SDLAudioDevice.cpp
+++ b/player/SDLAudioDevice.cpp
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
+ *
+ * This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
+ *
+ * Use of this source code is governed by MIT license that can be found in the
+ * LICENSE file in the root of the source tree. All contributing project authors
+ * may be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "Util/logger.h"
+#include "AudioSRC.h"
+#include "SDLAudioDevice.h"
+
+using namespace std;
+using namespace toolkit;
+
+INSTANCE_IMP(SDLAudioDevice);
+
+SDLAudioDevice::~SDLAudioDevice() {
+    SDL_CloseAudio();
+}
+
+SDLAudioDevice::SDLAudioDevice() {
+    SDL_AudioSpec wanted_spec;
+    wanted_spec.freq = DEFAULT_SAMPLERATE;
+    wanted_spec.format = DEFAULT_FORMAT;
+    wanted_spec.channels = DEFAULT_CHANNEL;
+    wanted_spec.silence = 0;
+    wanted_spec.samples = DEFAULT_SAMPLES;
+    wanted_spec.userdata = this;
+    wanted_spec.callback = [](void *userdata, Uint8 *stream, int len) {
+        SDLAudioDevice *_this = (SDLAudioDevice *) userdata;
+        _this->onReqPCM((char *) stream, len);
+    };
+    if (SDL_OpenAudio(&wanted_spec, &_audio_config) < 0) {
+        throw std::runtime_error("SDL_OpenAudio failed");
+    }
+
+    InfoL << "actual audioSpec, " << "freq:" << _audio_config.freq
+          << ", format:" << hex << _audio_config.format << dec
+          << ", channels:" << (int) _audio_config.channels
+          << ", samples:" << _audio_config.samples
+          << ", pcm size:" << _audio_config.size;
+
+    _play_buf.reset(new char[_audio_config.size], [](char *ptr) {
+        delete[] ptr;
+    });
+}
+
+void SDLAudioDevice::addChannel(AudioSRC *chn) {
+    lock_guard<recursive_mutex> lck(_channel_mtx);
+    if (_channels.empty()) {
+        SDL_PauseAudio(0);
+    }
+    chn->setOutputAudioConfig(_audio_config);
+    _channels.emplace(chn);
+}
+
+void SDLAudioDevice::delChannel(AudioSRC *chn) {
+    lock_guard<recursive_mutex> lck(_channel_mtx);
+    _channels.erase(chn);
+    if (_channels.empty()) {
+        SDL_PauseAudio(true);
+    }
+}
+
+void SDLAudioDevice::onReqPCM(char *stream, int len) {
+    lock_guard<recursive_mutex> lck(_channel_mtx);
+    int size;
+    int channel = 0;
+    for (auto &chn : _channels) {
+        if (channel == 0) {
+            size = chn->getPCMData(_play_buf.get(), len);
+            if (size) {
+                memcpy(stream, _play_buf.get(), size);
+            }
+        } else {
+            size = chn->getPCMData(_play_buf.get(), len);
+            if (size) {
+                SDL_MixAudio((Uint8 *) stream, (Uint8 *) _play_buf.get(), size, SDL_MIX_MAXVOLUME);
+            }
+        }
+        if (size) {
+            channel++;
+        }
+    }
+
+    if (!channel) {
+        memset(stream, 0, len);
+    }
+}
+