305 lines
7.2 KiB
C
305 lines
7.2 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Audio Output Virtual Channel
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*
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* Copyright 2012 Laxmikant Rashinkar <LK.Rashinkar@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <winpr/crt.h>
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#include <freerdp/types.h>
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#include <freerdp/codec/dsp.h>
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#include <freerdp/utils/svc_plugin.h>
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#include <AudioToolbox/AudioToolbox.h>
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#include <AudioToolbox/AudioQueue.h>
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#include "rdpsnd_main.h"
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#define MAC_AUDIO_QUEUE_NUM_BUFFERS 10
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#define MAC_AUDIO_QUEUE_BUFFER_SIZE 32768
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struct rdpsnd_mac_plugin
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{
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rdpsndDevicePlugin device;
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BOOL isOpen;
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BOOL isPlaying;
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UINT32 latency;
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AUDIO_FORMAT format;
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int audioBufferIndex;
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AudioQueueRef audioQueue;
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AudioStreamBasicDescription audioFormat;
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AudioQueueBufferRef audioBuffers[MAC_AUDIO_QUEUE_NUM_BUFFERS];
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};
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typedef struct rdpsnd_mac_plugin rdpsndMacPlugin;
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static void mac_audio_queue_output_cb(void* inUserData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffer)
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{
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}
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static void rdpsnd_mac_set_format(rdpsndDevicePlugin* device, AUDIO_FORMAT* format, int latency)
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{
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rdpsndMacPlugin* mac = (rdpsndMacPlugin*) device;
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mac->latency = (UINT32) latency;
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CopyMemory(&(mac->format), format, sizeof(AUDIO_FORMAT));
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switch (format->wFormatTag)
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{
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case WAVE_FORMAT_ALAW:
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mac->audioFormat.mFormatID = kAudioFormatALaw;
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break;
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case WAVE_FORMAT_MULAW:
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mac->audioFormat.mFormatID = kAudioFormatULaw;
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break;
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case WAVE_FORMAT_PCM:
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mac->audioFormat.mFormatID = kAudioFormatLinearPCM;
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break;
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case WAVE_FORMAT_GSM610:
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mac->audioFormat.mFormatID = kAudioFormatMicrosoftGSM;
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break;
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default:
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break;
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}
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mac->audioFormat.mSampleRate = format->nSamplesPerSec;
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mac->audioFormat.mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
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mac->audioFormat.mFramesPerPacket = 1;
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mac->audioFormat.mChannelsPerFrame = format->nChannels;
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mac->audioFormat.mBitsPerChannel = format->wBitsPerSample;
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mac->audioFormat.mBytesPerFrame = (format->wBitsPerSample * format->nChannels) / 8;
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mac->audioFormat.mBytesPerPacket = format->nBlockAlign;
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mac->audioFormat.mReserved = 0;
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rdpsnd_print_audio_format(format);
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}
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static void rdpsnd_mac_open(rdpsndDevicePlugin* device, AUDIO_FORMAT* format, int latency)
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{
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int index;
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OSStatus status;
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rdpsndMacPlugin* mac = (rdpsndMacPlugin*) device;
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if (mac->isOpen)
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return;
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mac->audioBufferIndex = 0;
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device->SetFormat(device, format, 0);
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status = AudioQueueNewOutput(&(mac->audioFormat),
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mac_audio_queue_output_cb, mac,
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NULL, NULL, 0, &(mac->audioQueue));
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if (status != 0)
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{
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fprintf(stderr, "AudioQueueNewOutput failure\n");
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return;
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}
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UInt32 DecodeBufferSizeFrames;
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UInt32 propertySize = sizeof(DecodeBufferSizeFrames);
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AudioQueueGetProperty(mac->audioQueue,
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kAudioQueueProperty_DecodeBufferSizeFrames,
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&DecodeBufferSizeFrames,
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&propertySize);
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if (status != 0)
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{
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printf("AudioQueueGetProperty failure: kAudioQueueProperty_DecodeBufferSizeFrames\n");
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}
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for (index = 0; index < MAC_AUDIO_QUEUE_NUM_BUFFERS; index++)
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{
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status = AudioQueueAllocateBuffer(mac->audioQueue, MAC_AUDIO_QUEUE_BUFFER_SIZE, &mac->audioBuffers[index]);
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if (status != 0)
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{
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fprintf(stderr, "AudioQueueAllocateBuffer failed\n");
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}
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}
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mac->isOpen = TRUE;
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}
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static void rdpsnd_mac_close(rdpsndDevicePlugin* device)
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{
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rdpsndMacPlugin* mac = (rdpsndMacPlugin*) device;
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if (mac->isOpen)
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{
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mac->isOpen = FALSE;
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AudioQueueStop(mac->audioQueue, true);
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AudioQueueDispose(mac->audioQueue, true);
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mac->audioQueue = NULL;
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mac->isPlaying = FALSE;
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}
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}
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static void rdpsnd_mac_free(rdpsndDevicePlugin* device)
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{
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rdpsndMacPlugin* mac = (rdpsndMacPlugin*) device;
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device->Close(device);
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free(mac);
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}
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static BOOL rdpsnd_mac_format_supported(rdpsndDevicePlugin* device, AUDIO_FORMAT* format)
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{
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if (format->wFormatTag == WAVE_FORMAT_PCM)
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{
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return TRUE;
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}
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else if (format->wFormatTag == WAVE_FORMAT_ALAW)
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{
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return TRUE;
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}
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else if (format->wFormatTag == WAVE_FORMAT_MULAW)
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{
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return TRUE;
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}
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else if (format->wFormatTag == WAVE_FORMAT_GSM610)
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{
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return FALSE;
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}
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return FALSE;
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}
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static void rdpsnd_mac_set_volume(rdpsndDevicePlugin* device, UINT32 value)
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{
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OSStatus status;
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Float32 fVolume;
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UINT16 volumeLeft;
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UINT16 volumeRight;
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rdpsndMacPlugin* mac = (rdpsndMacPlugin*) device;
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if (!mac->audioQueue)
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return;
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volumeLeft = (value & 0xFFFF);
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volumeRight = ((value >> 16) & 0xFFFF);
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fVolume = ((float) volumeLeft) / 65535.0;
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status = AudioQueueSetParameter(mac->audioQueue, kAudioQueueParam_Volume, fVolume);
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if (status != 0)
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{
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fprintf(stderr, "AudioQueueSetParameter kAudioQueueParam_Volume failed: %f\n", fVolume);
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}
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}
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static void rdpsnd_mac_start(rdpsndDevicePlugin* device)
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{
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rdpsndMacPlugin* mac = (rdpsndMacPlugin*) device;
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if (!mac->isPlaying)
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{
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OSStatus status;
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if (!mac->audioQueue)
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return;
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status = AudioQueueStart(mac->audioQueue, NULL);
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if (status != 0)
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{
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fprintf(stderr, "AudioQueueStart failed\n");
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}
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mac->isPlaying = TRUE;
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}
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}
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static void rdpsnd_mac_play(rdpsndDevicePlugin* device, BYTE* data, int size)
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{
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int length;
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AudioQueueBufferRef audioBuffer;
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rdpsndMacPlugin* mac = (rdpsndMacPlugin*) device;
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if (!mac->isOpen)
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return;
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audioBuffer = mac->audioBuffers[mac->audioBufferIndex];
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length = size > audioBuffer->mAudioDataBytesCapacity ? audioBuffer->mAudioDataBytesCapacity : size;
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CopyMemory(audioBuffer->mAudioData, data, length);
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audioBuffer->mAudioDataByteSize = length;
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AudioQueueEnqueueBuffer(mac->audioQueue, audioBuffer, 0, 0);
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mac->audioBufferIndex++;
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if (mac->audioBufferIndex >= MAC_AUDIO_QUEUE_NUM_BUFFERS)
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{
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mac->audioBufferIndex = 0;
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}
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device->Start(device);
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}
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#ifdef STATIC_CHANNELS
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#define freerdp_rdpsnd_client_subsystem_entry mac_freerdp_rdpsnd_client_subsystem_entry
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#endif
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int freerdp_rdpsnd_client_subsystem_entry(PFREERDP_RDPSND_DEVICE_ENTRY_POINTS pEntryPoints)
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{
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rdpsndMacPlugin* mac;
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mac = (rdpsndMacPlugin*) malloc(sizeof(rdpsndMacPlugin));
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if (mac)
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{
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ZeroMemory(mac, sizeof(rdpsndMacPlugin));
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mac->device.Open = rdpsnd_mac_open;
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mac->device.FormatSupported = rdpsnd_mac_format_supported;
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mac->device.SetFormat = rdpsnd_mac_set_format;
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mac->device.SetVolume = rdpsnd_mac_set_volume;
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mac->device.Play = rdpsnd_mac_play;
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mac->device.Start = rdpsnd_mac_start;
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mac->device.Close = rdpsnd_mac_close;
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mac->device.Free = rdpsnd_mac_free;
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pEntryPoints->pRegisterRdpsndDevice(pEntryPoints->rdpsnd, (rdpsndDevicePlugin*) mac);
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}
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return 0;
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}
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