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-rw-r--r--src/output/WinmmOutputPlugin.cxx359
1 files changed, 359 insertions, 0 deletions
diff --git a/src/output/WinmmOutputPlugin.cxx b/src/output/WinmmOutputPlugin.cxx
new file mode 100644
index 000000000..7944e2bdd
--- /dev/null
+++ b/src/output/WinmmOutputPlugin.cxx
@@ -0,0 +1,359 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "WinmmOutputPlugin.hxx"
+#include "output_api.h"
+#include "pcm_buffer.h"
+#include "mixer_list.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "winmm_output"
+
+struct WinmmBuffer {
+ struct pcm_buffer buffer;
+
+ WAVEHDR hdr;
+};
+
+struct WinmmOutput {
+ struct audio_output base;
+
+ UINT device_id;
+ HWAVEOUT handle;
+
+ /**
+ * This event is triggered by Windows when a buffer is
+ * finished.
+ */
+ HANDLE event;
+
+ WinmmBuffer buffers[8];
+ unsigned next_buffer;
+};
+
+/**
+ * The quark used for GError.domain.
+ */
+static inline GQuark
+winmm_output_quark(void)
+{
+ return g_quark_from_static_string("winmm_output");
+}
+
+HWAVEOUT
+winmm_output_get_handle(WinmmOutput *output)
+{
+ return output->handle;
+}
+
+static bool
+winmm_output_test_default_device(void)
+{
+ return waveOutGetNumDevs() > 0;
+}
+
+static bool
+get_device_id(const char *device_name, UINT *device_id, GError **error_r)
+{
+ /* if device is not specified use wave mapper */
+ if (device_name == nullptr) {
+ *device_id = WAVE_MAPPER;
+ return true;
+ }
+
+ UINT numdevs = waveOutGetNumDevs();
+
+ /* check for device id */
+ char *endptr;
+ UINT id = strtoul(device_name, &endptr, 0);
+ if (endptr > device_name && *endptr == 0) {
+ if (id >= numdevs)
+ goto fail;
+ *device_id = id;
+ return true;
+ }
+
+ /* check for device name */
+ for (UINT i = 0; i < numdevs; i++) {
+ WAVEOUTCAPS caps;
+ MMRESULT result = waveOutGetDevCaps(i, &caps, sizeof(caps));
+ if (result != MMSYSERR_NOERROR)
+ continue;
+ /* szPname is only 32 chars long, so it is often truncated.
+ Use partial match to work around this. */
+ if (strstr(device_name, caps.szPname) == device_name) {
+ *device_id = i;
+ return true;
+ }
+ }
+
+fail:
+ g_set_error(error_r, winmm_output_quark(), 0,
+ "device \"%s\" is not found", device_name);
+ return false;
+}
+
+static struct audio_output *
+winmm_output_init(const struct config_param *param, GError **error_r)
+{
+ WinmmOutput *wo = new WinmmOutput();
+ if (!ao_base_init(&wo->base, &winmm_output_plugin, param, error_r)) {
+ g_free(wo);
+ return nullptr;
+ }
+
+ const char *device = config_get_block_string(param, "device", nullptr);
+ if (!get_device_id(device, &wo->device_id, error_r)) {
+ ao_base_finish(&wo->base);
+ g_free(wo);
+ return nullptr;
+ }
+
+ return &wo->base;
+}
+
+static void
+winmm_output_finish(struct audio_output *ao)
+{
+ WinmmOutput *wo = (WinmmOutput *)ao;
+
+ ao_base_finish(&wo->base);
+ delete wo;
+}
+
+static bool
+winmm_output_open(struct audio_output *ao, struct audio_format *audio_format,
+ GError **error_r)
+{
+ WinmmOutput *wo = (WinmmOutput *)ao;
+
+ wo->event = CreateEvent(nullptr, false, false, nullptr);
+ if (wo->event == nullptr) {
+ g_set_error(error_r, winmm_output_quark(), 0,
+ "CreateEvent() failed");
+ return false;
+ }
+
+ switch (audio_format->format) {
+ case SAMPLE_FORMAT_S8:
+ case SAMPLE_FORMAT_S16:
+ break;
+
+ case SAMPLE_FORMAT_S24_P32:
+ case SAMPLE_FORMAT_S32:
+ case SAMPLE_FORMAT_UNDEFINED:
+ /* we havn't tested formats other than S16 */
+ audio_format->format = SAMPLE_FORMAT_S16;
+ break;
+ }
+
+ if (audio_format->channels > 2)
+ /* same here: more than stereo was not tested */
+ audio_format->channels = 2;
+
+ WAVEFORMATEX format;
+ format.wFormatTag = WAVE_FORMAT_PCM;
+ format.nChannels = audio_format->channels;
+ format.nSamplesPerSec = audio_format->sample_rate;
+ format.nBlockAlign = audio_format_frame_size(audio_format);
+ format.nAvgBytesPerSec = format.nSamplesPerSec * format.nBlockAlign;
+ format.wBitsPerSample = audio_format_sample_size(audio_format) * 8;
+ format.cbSize = 0;
+
+ MMRESULT result = waveOutOpen(&wo->handle, wo->device_id, &format,
+ (DWORD_PTR)wo->event, 0, CALLBACK_EVENT);
+ if (result != MMSYSERR_NOERROR) {
+ CloseHandle(wo->event);
+ g_set_error(error_r, winmm_output_quark(), result,
+ "waveOutOpen() failed");
+ return false;
+ }
+
+ for (unsigned i = 0; i < G_N_ELEMENTS(wo->buffers); ++i) {
+ pcm_buffer_init(&wo->buffers[i].buffer);
+ memset(&wo->buffers[i].hdr, 0, sizeof(wo->buffers[i].hdr));
+ }
+
+ wo->next_buffer = 0;
+
+ return true;
+}
+
+static void
+winmm_output_close(struct audio_output *ao)
+{
+ WinmmOutput *wo = (WinmmOutput *)ao;
+
+ for (unsigned i = 0; i < G_N_ELEMENTS(wo->buffers); ++i)
+ pcm_buffer_deinit(&wo->buffers[i].buffer);
+
+ waveOutClose(wo->handle);
+
+ CloseHandle(wo->event);
+}
+
+/**
+ * Copy data into a buffer, and prepare the wave header.
+ */
+static bool
+winmm_set_buffer(WinmmOutput *wo, WinmmBuffer *buffer,
+ const void *data, size_t size,
+ GError **error_r)
+{
+ void *dest = pcm_buffer_get(&buffer->buffer, size);
+ assert(dest != nullptr);
+
+ memcpy(dest, data, size);
+
+ memset(&buffer->hdr, 0, sizeof(buffer->hdr));
+ buffer->hdr.lpData = (LPSTR)dest;
+ buffer->hdr.dwBufferLength = size;
+
+ MMRESULT result = waveOutPrepareHeader(wo->handle, &buffer->hdr,
+ sizeof(buffer->hdr));
+ if (result != MMSYSERR_NOERROR) {
+ g_set_error(error_r, winmm_output_quark(), result,
+ "waveOutPrepareHeader() failed");
+ return false;
+ }
+
+ return true;
+}
+
+/**
+ * Wait until the buffer is finished.
+ */
+static bool
+winmm_drain_buffer(WinmmOutput *wo, WinmmBuffer *buffer,
+ GError **error_r)
+{
+ if ((buffer->hdr.dwFlags & WHDR_DONE) == WHDR_DONE)
+ /* already finished */
+ return true;
+
+ while (true) {
+ MMRESULT result = waveOutUnprepareHeader(wo->handle,
+ &buffer->hdr,
+ sizeof(buffer->hdr));
+ if (result == MMSYSERR_NOERROR)
+ return true;
+ else if (result != WAVERR_STILLPLAYING) {
+ g_set_error(error_r, winmm_output_quark(), result,
+ "waveOutUnprepareHeader() failed");
+ return false;
+ }
+
+ /* wait some more */
+ WaitForSingleObject(wo->event, INFINITE);
+ }
+}
+
+static size_t
+winmm_output_play(struct audio_output *ao, const void *chunk, size_t size, GError **error_r)
+{
+ WinmmOutput *wo = (WinmmOutput *)ao;
+
+ /* get the next buffer from the ring and prepare it */
+ WinmmBuffer *buffer = &wo->buffers[wo->next_buffer];
+ if (!winmm_drain_buffer(wo, buffer, error_r) ||
+ !winmm_set_buffer(wo, buffer, chunk, size, error_r))
+ return 0;
+
+ /* enqueue the buffer */
+ MMRESULT result = waveOutWrite(wo->handle, &buffer->hdr,
+ sizeof(buffer->hdr));
+ if (result != MMSYSERR_NOERROR) {
+ waveOutUnprepareHeader(wo->handle, &buffer->hdr,
+ sizeof(buffer->hdr));
+ g_set_error(error_r, winmm_output_quark(), result,
+ "waveOutWrite() failed");
+ return 0;
+ }
+
+ /* mark our buffer as "used" */
+ wo->next_buffer = (wo->next_buffer + 1) %
+ G_N_ELEMENTS(wo->buffers);
+
+ return size;
+}
+
+static bool
+winmm_drain_all_buffers(WinmmOutput *wo, GError **error_r)
+{
+ for (unsigned i = wo->next_buffer; i < G_N_ELEMENTS(wo->buffers); ++i)
+ if (!winmm_drain_buffer(wo, &wo->buffers[i], error_r))
+ return false;
+
+ for (unsigned i = 0; i < wo->next_buffer; ++i)
+ if (!winmm_drain_buffer(wo, &wo->buffers[i], error_r))
+ return false;
+
+ return true;
+}
+
+static void
+winmm_stop(WinmmOutput *wo)
+{
+ waveOutReset(wo->handle);
+
+ for (unsigned i = 0; i < G_N_ELEMENTS(wo->buffers); ++i) {
+ WinmmBuffer *buffer = &wo->buffers[i];
+ waveOutUnprepareHeader(wo->handle, &buffer->hdr,
+ sizeof(buffer->hdr));
+ }
+}
+
+static void
+winmm_output_drain(struct audio_output *ao)
+{
+ WinmmOutput *wo = (WinmmOutput *)ao;
+
+ if (!winmm_drain_all_buffers(wo, nullptr))
+ winmm_stop(wo);
+}
+
+static void
+winmm_output_cancel(struct audio_output *ao)
+{
+ WinmmOutput *wo = (WinmmOutput *)ao;
+
+ winmm_stop(wo);
+}
+
+const struct audio_output_plugin winmm_output_plugin = {
+ "winmm",
+ winmm_output_test_default_device,
+ winmm_output_init,
+ winmm_output_finish,
+ nullptr,
+ nullptr,
+ winmm_output_open,
+ winmm_output_close,
+ nullptr,
+ nullptr,
+ winmm_output_play,
+ winmm_output_drain,
+ winmm_output_cancel,
+ nullptr,
+ &winmm_mixer_plugin,
+};