output/*: move to output/plugins/
This commit is contained in:
Max Kellermann
353
src/output/plugins/WinmmOutputPlugin.cxx
Normal file
353
src/output/plugins/WinmmOutputPlugin.cxx
Normal file
@@ -0,0 +1,353 @@
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/*
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* Copyright (C) 2003-2014 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "WinmmOutputPlugin.hxx"
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#include "../OutputAPI.hxx"
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#include "pcm/PcmBuffer.hxx"
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#include "MixerList.hxx"
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#include "util/Error.hxx"
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#include "util/Domain.hxx"
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#include "util/Macros.hxx"
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#include <glib.h>
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#include <stdlib.h>
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#include <string.h>
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struct WinmmBuffer {
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PcmBuffer buffer;
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WAVEHDR hdr;
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};
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struct WinmmOutput {
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struct audio_output base;
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UINT device_id;
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HWAVEOUT handle;
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/**
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* This event is triggered by Windows when a buffer is
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* finished.
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*/
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HANDLE event;
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WinmmBuffer buffers[8];
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unsigned next_buffer;
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};
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static constexpr Domain winmm_output_domain("winmm_output");
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HWAVEOUT
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winmm_output_get_handle(WinmmOutput *output)
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{
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return output->handle;
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}
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static bool
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winmm_output_test_default_device(void)
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{
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return waveOutGetNumDevs() > 0;
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}
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static bool
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get_device_id(const char *device_name, UINT *device_id, Error &error)
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{
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/* if device is not specified use wave mapper */
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if (device_name == nullptr) {
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*device_id = WAVE_MAPPER;
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return true;
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}
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UINT numdevs = waveOutGetNumDevs();
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/* check for device id */
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char *endptr;
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UINT id = strtoul(device_name, &endptr, 0);
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if (endptr > device_name && *endptr == 0) {
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if (id >= numdevs)
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goto fail;
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*device_id = id;
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return true;
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}
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/* check for device name */
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for (UINT i = 0; i < numdevs; i++) {
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WAVEOUTCAPS caps;
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MMRESULT result = waveOutGetDevCaps(i, &caps, sizeof(caps));
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if (result != MMSYSERR_NOERROR)
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continue;
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/* szPname is only 32 chars long, so it is often truncated.
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Use partial match to work around this. */
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if (strstr(device_name, caps.szPname) == device_name) {
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*device_id = i;
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return true;
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}
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}
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fail:
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error.Format(winmm_output_domain,
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"device \"%s\" is not found", device_name);
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return false;
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}
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static struct audio_output *
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winmm_output_init(const config_param ¶m, Error &error)
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{
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WinmmOutput *wo = new WinmmOutput();
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if (!ao_base_init(&wo->base, &winmm_output_plugin, param, error)) {
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delete wo;
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return nullptr;
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}
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const char *device = param.GetBlockValue("device");
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if (!get_device_id(device, &wo->device_id, error)) {
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ao_base_finish(&wo->base);
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delete wo;
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return nullptr;
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}
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return &wo->base;
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}
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static void
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winmm_output_finish(struct audio_output *ao)
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{
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WinmmOutput *wo = (WinmmOutput *)ao;
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ao_base_finish(&wo->base);
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delete wo;
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}
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static bool
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winmm_output_open(struct audio_output *ao, AudioFormat &audio_format,
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Error &error)
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{
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WinmmOutput *wo = (WinmmOutput *)ao;
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wo->event = CreateEvent(nullptr, false, false, nullptr);
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if (wo->event == nullptr) {
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error.Set(winmm_output_domain, "CreateEvent() failed");
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return false;
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}
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switch (audio_format.format) {
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case SampleFormat::S8:
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case SampleFormat::S16:
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break;
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case SampleFormat::S24_P32:
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case SampleFormat::S32:
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case SampleFormat::FLOAT:
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case SampleFormat::DSD:
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case SampleFormat::UNDEFINED:
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/* we havn't tested formats other than S16 */
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audio_format.format = SampleFormat::S16;
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break;
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}
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if (audio_format.channels > 2)
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/* same here: more than stereo was not tested */
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audio_format.channels = 2;
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WAVEFORMATEX format;
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format.wFormatTag = WAVE_FORMAT_PCM;
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format.nChannels = audio_format.channels;
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format.nSamplesPerSec = audio_format.sample_rate;
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format.nBlockAlign = audio_format.GetFrameSize();
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format.nAvgBytesPerSec = format.nSamplesPerSec * format.nBlockAlign;
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format.wBitsPerSample = audio_format.GetSampleSize() * 8;
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format.cbSize = 0;
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MMRESULT result = waveOutOpen(&wo->handle, wo->device_id, &format,
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(DWORD_PTR)wo->event, 0, CALLBACK_EVENT);
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if (result != MMSYSERR_NOERROR) {
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CloseHandle(wo->event);
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error.Set(winmm_output_domain, "waveOutOpen() failed");
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return false;
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}
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for (unsigned i = 0; i < ARRAY_SIZE(wo->buffers); ++i) {
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memset(&wo->buffers[i].hdr, 0, sizeof(wo->buffers[i].hdr));
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}
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wo->next_buffer = 0;
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return true;
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}
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static void
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winmm_output_close(struct audio_output *ao)
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{
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WinmmOutput *wo = (WinmmOutput *)ao;
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for (unsigned i = 0; i < ARRAY_SIZE(wo->buffers); ++i)
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wo->buffers[i].buffer.Clear();
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waveOutClose(wo->handle);
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CloseHandle(wo->event);
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}
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/**
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* Copy data into a buffer, and prepare the wave header.
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*/
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static bool
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winmm_set_buffer(WinmmOutput *wo, WinmmBuffer *buffer,
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const void *data, size_t size,
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Error &error)
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{
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void *dest = buffer->buffer.Get(size);
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assert(dest != nullptr);
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memcpy(dest, data, size);
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memset(&buffer->hdr, 0, sizeof(buffer->hdr));
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buffer->hdr.lpData = (LPSTR)dest;
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buffer->hdr.dwBufferLength = size;
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MMRESULT result = waveOutPrepareHeader(wo->handle, &buffer->hdr,
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sizeof(buffer->hdr));
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if (result != MMSYSERR_NOERROR) {
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error.Set(winmm_output_domain, result,
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"waveOutPrepareHeader() failed");
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return false;
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}
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return true;
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}
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/**
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* Wait until the buffer is finished.
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*/
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static bool
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winmm_drain_buffer(WinmmOutput *wo, WinmmBuffer *buffer,
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Error &error)
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{
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if ((buffer->hdr.dwFlags & WHDR_DONE) == WHDR_DONE)
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/* already finished */
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return true;
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while (true) {
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MMRESULT result = waveOutUnprepareHeader(wo->handle,
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&buffer->hdr,
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sizeof(buffer->hdr));
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if (result == MMSYSERR_NOERROR)
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return true;
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else if (result != WAVERR_STILLPLAYING) {
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error.Set(winmm_output_domain, result,
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"waveOutUnprepareHeader() failed");
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return false;
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}
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/* wait some more */
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WaitForSingleObject(wo->event, INFINITE);
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}
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}
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static size_t
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winmm_output_play(struct audio_output *ao, const void *chunk, size_t size, Error &error)
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{
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WinmmOutput *wo = (WinmmOutput *)ao;
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/* get the next buffer from the ring and prepare it */
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WinmmBuffer *buffer = &wo->buffers[wo->next_buffer];
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if (!winmm_drain_buffer(wo, buffer, error) ||
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!winmm_set_buffer(wo, buffer, chunk, size, error))
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return 0;
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/* enqueue the buffer */
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MMRESULT result = waveOutWrite(wo->handle, &buffer->hdr,
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sizeof(buffer->hdr));
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if (result != MMSYSERR_NOERROR) {
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waveOutUnprepareHeader(wo->handle, &buffer->hdr,
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sizeof(buffer->hdr));
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error.Set(winmm_output_domain, result,
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"waveOutWrite() failed");
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return 0;
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}
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/* mark our buffer as "used" */
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wo->next_buffer = (wo->next_buffer + 1) %
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ARRAY_SIZE(wo->buffers);
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return size;
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}
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static bool
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winmm_drain_all_buffers(WinmmOutput *wo, Error &error)
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{
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for (unsigned i = wo->next_buffer; i < ARRAY_SIZE(wo->buffers); ++i)
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if (!winmm_drain_buffer(wo, &wo->buffers[i], error))
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return false;
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for (unsigned i = 0; i < wo->next_buffer; ++i)
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if (!winmm_drain_buffer(wo, &wo->buffers[i], error))
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return false;
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return true;
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}
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static void
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winmm_stop(WinmmOutput *wo)
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{
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waveOutReset(wo->handle);
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for (unsigned i = 0; i < ARRAY_SIZE(wo->buffers); ++i) {
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WinmmBuffer *buffer = &wo->buffers[i];
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waveOutUnprepareHeader(wo->handle, &buffer->hdr,
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sizeof(buffer->hdr));
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}
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}
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static void
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winmm_output_drain(struct audio_output *ao)
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{
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WinmmOutput *wo = (WinmmOutput *)ao;
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if (!winmm_drain_all_buffers(wo, IgnoreError()))
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winmm_stop(wo);
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}
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static void
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winmm_output_cancel(struct audio_output *ao)
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{
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WinmmOutput *wo = (WinmmOutput *)ao;
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winmm_stop(wo);
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}
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const struct audio_output_plugin winmm_output_plugin = {
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"winmm",
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winmm_output_test_default_device,
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winmm_output_init,
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winmm_output_finish,
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nullptr,
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nullptr,
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winmm_output_open,
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winmm_output_close,
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nullptr,
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nullptr,
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winmm_output_play,
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winmm_output_drain,
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winmm_output_cancel,
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nullptr,
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&winmm_mixer_plugin,
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};
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