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authorDenis Krjuchkov <alcohold@gmail.com>2010-10-08 23:55:14 +0600
committerDenis Krjuchkov <alcohold@gmail.com>2010-10-08 23:55:14 +0600
commit20004b7ee09db7de5a58ef50735b64309709a4c7 (patch)
tree9ae51c443fc7b851f6b1fe717e574d08adc2f837 /src/output/winmm_output_plugin.c
parent84e037631da0cf7e3d7099c566a181a2d506ed4c (diff)
downloadmpd-20004b7ee09db7de5a58ef50735b64309709a4c7.tar.gz
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win32_output: renamed win32 output plugin to winmm
Win32 has many audio APIs. New name is slightly more correct.
Diffstat (limited to 'src/output/winmm_output_plugin.c')
-rw-r--r--src/output/winmm_output_plugin.c296
1 files changed, 296 insertions, 0 deletions
diff --git a/src/output/winmm_output_plugin.c b/src/output/winmm_output_plugin.c
new file mode 100644
index 000000000..88c338c52
--- /dev/null
+++ b/src/output/winmm_output_plugin.c
@@ -0,0 +1,296 @@
+/*
+ * Copyright (C) 2003-2010 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 "output_api.h"
+#include "pcm_buffer.h"
+
+#include <windows.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "winmm_output"
+
+struct winmm_buffer {
+ struct pcm_buffer buffer;
+
+ WAVEHDR hdr;
+};
+
+struct winmm_output {
+ HWAVEOUT handle;
+
+ /**
+ * This event is triggered by Windows when a buffer is
+ * finished.
+ */
+ HANDLE event;
+
+ struct winmm_buffer 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");
+}
+
+static bool
+winmm_output_test_default_device(void)
+{
+ /* we assume that Wave is always available */
+ return true;
+}
+
+static void *
+winmm_output_init(G_GNUC_UNUSED const struct audio_format *audio_format,
+ G_GNUC_UNUSED const struct config_param *param,
+ G_GNUC_UNUSED GError **error)
+{
+ struct winmm_output *wo = g_new(struct winmm_output, 1);
+
+ return wo;
+}
+
+static void
+winmm_output_finish(void *data)
+{
+ struct winmm_output *wo = data;
+
+ g_free(wo);
+}
+
+static bool
+winmm_output_open(void *data, struct audio_format *audio_format,
+ GError **error_r)
+{
+ struct winmm_output *wo = data;
+
+ wo->event = CreateEvent(NULL, false, false, NULL);
+ if (wo->event == NULL) {
+ 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:
+ 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, WAVE_MAPPER, &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(void *data)
+{
+ struct winmm_output *wo = data;
+
+ 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(struct winmm_output *wo, struct winmm_buffer *buffer,
+ const void *data, size_t size,
+ GError **error_r)
+{
+ void *dest = pcm_buffer_get(&buffer->buffer, size);
+ if (dest == NULL) {
+ g_set_error(error_r, winmm_output_quark(), 0,
+ "Out of memory");
+ return false;
+ }
+
+ memcpy(dest, data, size);
+
+ memset(&buffer->hdr, 0, sizeof(buffer->hdr));
+ buffer->hdr.lpData = 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(struct winmm_output *wo, struct winmm_buffer *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(void *data, const void *chunk, size_t size, GError **error_r)
+{
+ struct winmm_output *wo = data;
+
+ /* get the next buffer from the ring and prepare it */
+ struct winmm_buffer *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(struct winmm_output *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(struct winmm_output *wo)
+{
+ waveOutReset(wo->handle);
+
+ for (unsigned i = 0; i < G_N_ELEMENTS(wo->buffers); ++i) {
+ struct winmm_buffer *buffer = &wo->buffers[i];
+ waveOutUnprepareHeader(wo->handle, &buffer->hdr,
+ sizeof(buffer->hdr));
+ }
+}
+
+static void
+winmm_output_drain(void *data)
+{
+ struct winmm_output *wo = data;
+
+ if (!winmm_drain_all_buffers(wo, NULL))
+ winmm_stop(wo);
+}
+
+static void
+winmm_output_cancel(void *data)
+{
+ struct winmm_output *wo = data;
+
+ winmm_stop(wo);
+}
+
+const struct audio_output_plugin winmm_output_plugin = {
+ .name = "winmm",
+ .test_default_device = winmm_output_test_default_device,
+ .init = winmm_output_init,
+ .finish = winmm_output_finish,
+ .open = winmm_output_open,
+ .close = winmm_output_close,
+ .play = winmm_output_play,
+ .drain = winmm_output_drain,
+ .cancel = winmm_output_cancel,
+};