--- /dev/null
+/* $Id: module-waveout.c 333 2005-01-08 21:36:53Z lennart $ */
+
+/***
+ This file is part of polypaudio.
+
+ polypaudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 2 of the License,
+ or (at your option) any later version.
+
+ polypaudio 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 Lesser General Public License
+ along with polypaudio; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <windows.h>
+#include <mmsystem.h>
+#include <assert.h>
+
+#include "sink.h"
+#include "source.h"
+#include "module.h"
+#include "mainloop-api.h"
+#include "modargs.h"
+#include "sample-util.h"
+#include "util.h"
+#include "log.h"
+#include "xmalloc.h"
+#include "module-waveout-symdef.h"
+
+PA_MODULE_AUTHOR("Pierre Ossman")
+PA_MODULE_DESCRIPTION("Windows waveOut Sink/Source")
+PA_MODULE_VERSION(PACKAGE_VERSION)
+PA_MODULE_USAGE("sink_name=<name for the sink> source_name=<name for the source> record=<enable source?> playback=<enable sink?> format=<sample format> channels=<number of channels> rate=<sample rate> fragments=<number of fragments> fragment_size=<fragment size>")
+
+#define PA_TYPEID_WAVEOUT PA_TYPEID_MAKE('W', 'A', 'V', 'E')
+
+#define DEFAULT_SINK_NAME "wave_output"
+#define DEFAULT_SOURCE_NAME "wave_input"
+
+struct userdata {
+ struct pa_sink *sink;
+ struct pa_source *source;
+ struct pa_core *core;
+ struct pa_time_event *event;
+ struct pa_defer_event *defer;
+ pa_usec_t poll_timeout;
+
+ uint32_t fragments, fragment_size;
+
+ uint32_t free_ofrags, free_ifrags;
+
+ DWORD written_bytes;
+
+ int cur_ohdr, cur_ihdr;
+ unsigned int oremain;
+ WAVEHDR *ohdrs, *ihdrs;
+ struct pa_memchunk silence;
+
+ HWAVEOUT hwo;
+ HWAVEIN hwi;
+ struct pa_module *module;
+
+ CRITICAL_SECTION crit;
+};
+
+static const char* const valid_modargs[] = {
+ "sink_name",
+ "source_name",
+ "record",
+ "playback",
+ "fragments",
+ "fragment_size",
+ "format",
+ "rate",
+ "channels",
+ NULL
+};
+
+static void update_usage(struct userdata *u) {
+ pa_module_set_used(u->module,
+ (u->sink ? pa_idxset_ncontents(u->sink->inputs) : 0) +
+ (u->sink ? pa_idxset_ncontents(u->sink->monitor_source->outputs) : 0) +
+ (u->source ? pa_idxset_ncontents(u->source->outputs) : 0));
+}
+
+static void do_write(struct userdata *u)
+{
+ uint32_t free_frags, remain;
+ struct pa_memchunk memchunk, *cur_chunk;
+ WAVEHDR *hdr;
+ MMRESULT res;
+
+ if (!u->sink)
+ return;
+
+ EnterCriticalSection(&u->crit);
+
+ free_frags = u->free_ofrags;
+ u->free_ofrags = 0;
+
+ LeaveCriticalSection(&u->crit);
+
+ while (free_frags) {
+ hdr = &u->ohdrs[u->cur_ohdr];
+ if (hdr->dwFlags & WHDR_PREPARED)
+ waveOutUnprepareHeader(u->hwo, hdr, sizeof(WAVEHDR));
+
+ remain = u->oremain;
+ while (remain) {
+ cur_chunk = &memchunk;
+
+ if (pa_sink_render(u->sink, remain, cur_chunk) < 0) {
+ /*
+ * Don't fill with silence unless we're getting close to
+ * underflowing.
+ */
+ if (free_frags > u->fragments/2)
+ cur_chunk = &u->silence;
+ else {
+ EnterCriticalSection(&u->crit);
+
+ u->free_ofrags += free_frags;
+
+ LeaveCriticalSection(&u->crit);
+
+ u->oremain = remain;
+ return;
+ }
+ }
+
+ assert(cur_chunk->memblock);
+ assert(cur_chunk->memblock->data);
+ assert(cur_chunk->length);
+
+ memcpy(hdr->lpData + u->fragment_size - remain,
+ (char*)cur_chunk->memblock->data + cur_chunk->index,
+ (cur_chunk->length < remain)?cur_chunk->length:remain);
+
+ remain -= (cur_chunk->length < remain)?cur_chunk->length:remain;
+
+ if (cur_chunk != &u->silence) {
+ pa_memblock_unref(cur_chunk->memblock);
+ cur_chunk->memblock = NULL;
+ }
+ }
+
+ res = waveOutPrepareHeader(u->hwo, hdr, sizeof(WAVEHDR));
+ if (res != MMSYSERR_NOERROR) {
+ pa_log_error(__FILE__ ": ERROR: Unable to prepare waveOut block: %d\n",
+ res);
+ }
+ res = waveOutWrite(u->hwo, hdr, sizeof(WAVEHDR));
+ if (res != MMSYSERR_NOERROR) {
+ pa_log_error(__FILE__ ": ERROR: Unable to write waveOut block: %d\n",
+ res);
+ }
+
+ u->written_bytes += u->fragment_size;
+
+ free_frags--;
+ u->cur_ohdr++;
+ u->cur_ohdr %= u->fragments;
+ u->oremain = u->fragment_size;
+ }
+}
+
+static void do_read(struct userdata *u)
+{
+ uint32_t free_frags;
+ struct pa_memchunk memchunk;
+ WAVEHDR *hdr;
+ MMRESULT res;
+
+ if (!u->source)
+ return;
+
+ EnterCriticalSection(&u->crit);
+
+ free_frags = u->free_ifrags;
+ u->free_ifrags = 0;
+
+ LeaveCriticalSection(&u->crit);
+
+ while (free_frags) {
+ hdr = &u->ihdrs[u->cur_ihdr];
+ if (hdr->dwFlags & WHDR_PREPARED)
+ waveInUnprepareHeader(u->hwi, hdr, sizeof(WAVEHDR));
+
+ if (hdr->dwBytesRecorded) {
+ memchunk.memblock = pa_memblock_new(hdr->dwBytesRecorded, u->core->memblock_stat);
+ assert(memchunk.memblock);
+
+ memcpy((char*)memchunk.memblock->data, hdr->lpData, hdr->dwBytesRecorded);
+
+ memchunk.length = memchunk.memblock->length = hdr->dwBytesRecorded;
+ memchunk.index = 0;
+
+ pa_source_post(u->source, &memchunk);
+ pa_memblock_unref(memchunk.memblock);
+ }
+
+ res = waveInPrepareHeader(u->hwi, hdr, sizeof(WAVEHDR));
+ if (res != MMSYSERR_NOERROR) {
+ pa_log_error(__FILE__ ": ERROR: Unable to prepare waveIn block: %d\n",
+ res);
+ }
+ res = waveInAddBuffer(u->hwi, hdr, sizeof(WAVEHDR));
+ if (res != MMSYSERR_NOERROR) {
+ pa_log_error(__FILE__ ": ERROR: Unable to add waveIn block: %d\n",
+ res);
+ }
+
+ free_frags--;
+ u->cur_ihdr++;
+ u->cur_ihdr %= u->fragments;
+ }
+}
+
+static void poll_cb(struct pa_mainloop_api*a, struct pa_time_event *e, const struct timeval *tv, void *userdata) {
+ struct userdata *u = userdata;
+ struct timeval ntv;
+
+ assert(u);
+
+ update_usage(u);
+
+ do_write(u);
+ do_read(u);
+
+ pa_gettimeofday(&ntv);
+ pa_timeval_add(&ntv, u->poll_timeout);
+
+ a->time_restart(e, &ntv);
+}
+
+static void defer_cb(struct pa_mainloop_api*a, struct pa_defer_event *e, void *userdata) {
+ struct userdata *u = userdata;
+
+ assert(u);
+
+ a->defer_enable(e, 0);
+
+ do_write(u);
+ do_read(u);
+}
+
+static void CALLBACK chunk_done_cb(HWAVEOUT hwo, UINT msg, DWORD_PTR inst, DWORD param1, DWORD param2) {
+ struct userdata *u = (struct userdata *)inst;
+
+ if (msg != WOM_DONE)
+ return;
+
+ EnterCriticalSection(&u->crit);
+
+ u->free_ofrags++;
+ assert(u->free_ofrags <= u->fragments);
+
+ LeaveCriticalSection(&u->crit);
+}
+
+static void CALLBACK chunk_ready_cb(HWAVEIN hwi, UINT msg, DWORD_PTR inst, DWORD param1, DWORD param2) {
+ struct userdata *u = (struct userdata *)inst;
+
+ if (msg != WIM_DATA)
+ return;
+
+ EnterCriticalSection(&u->crit);
+
+ u->free_ifrags++;
+ assert(u->free_ifrags <= u->fragments);
+
+ LeaveCriticalSection(&u->crit);
+}
+
+static pa_usec_t sink_get_latency_cb(struct pa_sink *s) {
+ struct userdata *u = s->userdata;
+ uint32_t free_frags;
+ MMTIME mmt;
+ assert(s && u && u->sink);
+
+ memset(&mmt, 0, sizeof(mmt));
+ mmt.wType = TIME_BYTES;
+ if (waveOutGetPosition(u->hwo, &mmt, sizeof(mmt)) == MMSYSERR_NOERROR)
+ return pa_bytes_to_usec(u->written_bytes - mmt.u.cb, &s->sample_spec);
+ else {
+ EnterCriticalSection(&u->crit);
+
+ free_frags = u->free_ofrags;
+
+ LeaveCriticalSection(&u->crit);
+
+ return pa_bytes_to_usec((u->fragments - free_frags) * u->fragment_size,
+ &s->sample_spec);
+ }
+}
+
+static pa_usec_t source_get_latency_cb(struct pa_source *s) {
+ pa_usec_t r = 0;
+ struct userdata *u = s->userdata;
+ uint32_t free_frags;
+ assert(s && u && u->sink);
+
+ EnterCriticalSection(&u->crit);
+
+ free_frags = u->free_ifrags;
+
+ LeaveCriticalSection(&u->crit);
+
+ r += pa_bytes_to_usec((free_frags + 1) * u->fragment_size, &s->sample_spec);
+
+ fprintf(stderr, "Latency: %d us\n", (int)r);
+
+ return r;
+}
+
+static void notify_sink_cb(struct pa_sink *s) {
+ struct userdata *u = s->userdata;
+ assert(u);
+
+ u->core->mainloop->defer_enable(u->defer, 1);
+}
+
+static void notify_source_cb(struct pa_source *s) {
+ struct userdata *u = s->userdata;
+ assert(u);
+
+ u->core->mainloop->defer_enable(u->defer, 1);
+}
+
+static int ss_to_waveformat(struct pa_sample_spec *ss, LPWAVEFORMATEX wf) {
+ wf->wFormatTag = WAVE_FORMAT_PCM;
+
+ if (ss->channels > 2) {
+ pa_log_error(__FILE__": ERROR: More than two channels not supported.\n");
+ return -1;
+ }
+
+ wf->nChannels = ss->channels;
+
+ switch (ss->rate) {
+ case 8000:
+ case 11025:
+ case 22005:
+ case 44100:
+ break;
+ default:
+ pa_log_error(__FILE__": ERROR: Unsupported sample rate.\n");
+ return -1;
+ }
+
+ wf->nSamplesPerSec = ss->rate;
+
+ if (ss->format == PA_SAMPLE_U8)
+ wf->wBitsPerSample = 8;
+ else if (ss->format == PA_SAMPLE_S16NE)
+ wf->wBitsPerSample = 16;
+ else {
+ pa_log_error(__FILE__": ERROR: Unsupported sample format.\n");
+ return -1;
+ }
+
+ wf->nBlockAlign = wf->nChannels * wf->wBitsPerSample/8;
+ wf->nAvgBytesPerSec = wf->nSamplesPerSec * wf->nBlockAlign;
+
+ wf->cbSize = 0;
+
+ return 0;
+}
+
+int pa__init(struct pa_core *c, struct pa_module*m) {
+ struct userdata *u = NULL;
+ HWAVEOUT hwo = INVALID_HANDLE_VALUE;
+ HWAVEIN hwi = INVALID_HANDLE_VALUE;
+ WAVEFORMATEX wf;
+ int nfrags, frag_size;
+ int record = 1, playback = 1;
+ struct pa_sample_spec ss;
+ struct pa_modargs *ma = NULL;
+ unsigned int i;
+ struct timeval tv;
+
+ assert(c && m);
+
+ if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+ pa_log(__FILE__": failed to parse module arguments.\n");
+ goto fail;
+ }
+
+ if (pa_modargs_get_value_boolean(ma, "record", &record) < 0 || pa_modargs_get_value_boolean(ma, "playback", &playback) < 0) {
+ pa_log(__FILE__": record= and playback= expect boolean argument.\n");
+ goto fail;
+ }
+
+ if (!playback && !record) {
+ pa_log(__FILE__": neither playback nor record enabled for device.\n");
+ goto fail;
+ }
+
+ nfrags = 20;
+ frag_size = 1024;
+ if (pa_modargs_get_value_s32(ma, "fragments", &nfrags) < 0 || pa_modargs_get_value_s32(ma, "fragment_size", &frag_size) < 0) {
+ pa_log(__FILE__": failed to parse fragments arguments\n");
+ goto fail;
+ }
+
+ ss = c->default_sample_spec;
+ if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
+ pa_log(__FILE__": failed to parse sample specification\n");
+ goto fail;
+ }
+
+ if (ss_to_waveformat(&ss, &wf) < 0)
+ goto fail;
+
+ u = pa_xmalloc(sizeof(struct userdata));
+
+ if (record) {
+ if (waveInOpen(&hwi, WAVE_MAPPER, &wf, (DWORD_PTR)chunk_ready_cb, (DWORD_PTR)u, CALLBACK_FUNCTION) != MMSYSERR_NOERROR)
+ goto fail;
+ if (waveInStart(hwi) != MMSYSERR_NOERROR)
+ goto fail;
+ pa_log_debug(__FILE__": Opened waveIn subsystem.\n");
+ }
+
+ if (playback) {
+ if (waveOutOpen(&hwo, WAVE_MAPPER, &wf, (DWORD_PTR)chunk_done_cb, (DWORD_PTR)u, CALLBACK_FUNCTION) != MMSYSERR_NOERROR)
+ goto fail;
+ pa_log_debug(__FILE__": Opened waveOut subsystem.\n");
+ }
+
+ InitializeCriticalSection(&u->crit);
+
+ if (hwi != INVALID_HANDLE_VALUE) {
+ u->source = pa_source_new(c, PA_TYPEID_WAVEOUT, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss);
+ assert(u->source);
+ u->source->userdata = u;
+ u->source->notify = notify_source_cb;
+ u->source->get_latency = source_get_latency_cb;
+ pa_source_set_owner(u->source, m);
+ u->source->description = pa_sprintf_malloc("Windows waveIn PCM");
+ } else
+ u->source = NULL;
+
+ if (hwo != INVALID_HANDLE_VALUE) {
+ u->sink = pa_sink_new(c, PA_TYPEID_WAVEOUT, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss);
+ assert(u->sink);
+ u->sink->notify = notify_sink_cb;
+ u->sink->get_latency = sink_get_latency_cb;
+ u->sink->userdata = u;
+ pa_sink_set_owner(u->sink, m);
+ u->sink->description = pa_sprintf_malloc("Windows waveOut PCM");
+ } else
+ u->sink = NULL;
+
+ assert(u->source || u->sink);
+
+ u->core = c;
+ u->hwi = hwi;
+ u->hwo = hwo;
+
+ u->fragments = nfrags;
+ u->free_ifrags = u->fragments;
+ u->free_ofrags = u->fragments;
+ u->fragment_size = frag_size - (frag_size % pa_frame_size(&ss));
+
+ u->written_bytes = 0;
+
+ u->oremain = u->fragment_size;
+
+ u->poll_timeout = pa_bytes_to_usec(u->fragments * u->fragment_size / 3, &ss);
+
+ pa_gettimeofday(&tv);
+ pa_timeval_add(&tv, u->poll_timeout);
+
+ u->event = c->mainloop->time_new(c->mainloop, &tv, poll_cb, u);
+ assert(u->event);
+
+ u->defer = c->mainloop->defer_new(c->mainloop, defer_cb, u);
+ assert(u->defer);
+ c->mainloop->defer_enable(u->defer, 0);
+
+ u->cur_ihdr = 0;
+ u->cur_ohdr = 0;
+ u->ihdrs = pa_xmalloc0(sizeof(WAVEHDR) * u->fragments);
+ assert(u->ihdrs);
+ u->ohdrs = pa_xmalloc0(sizeof(WAVEHDR) * u->fragments);
+ assert(u->ohdrs);
+ for (i = 0;i < u->fragments;i++) {
+ u->ihdrs[i].dwBufferLength = u->fragment_size;
+ u->ohdrs[i].dwBufferLength = u->fragment_size;
+ u->ihdrs[i].lpData = pa_xmalloc(u->fragment_size);
+ assert(u->ihdrs);
+ u->ohdrs[i].lpData = pa_xmalloc(u->fragment_size);
+ assert(u->ohdrs);
+ }
+
+ u->silence.length = u->fragment_size;
+ u->silence.memblock = pa_memblock_new(u->silence.length, u->core->memblock_stat);
+ assert(u->silence.memblock);
+ pa_silence_memblock(u->silence.memblock, &ss);
+ u->silence.index = 0;
+
+ u->module = m;
+ m->userdata = u;
+
+ pa_modargs_free(ma);
+
+ return 0;
+
+fail:
+ if (hwi != INVALID_HANDLE_VALUE)
+ waveInClose(hwi);
+
+ if (hwo != INVALID_HANDLE_VALUE)
+ waveOutClose(hwo);
+
+ if (u)
+ pa_xfree(u);
+
+ if (ma)
+ pa_modargs_free(ma);
+
+ return -1;
+}
+
+void pa__done(struct pa_core *c, struct pa_module*m) {
+ struct userdata *u;
+ unsigned int i;
+
+ assert(c && m);
+
+ if (!(u = m->userdata))
+ return;
+
+ if (u->event)
+ c->mainloop->time_free(u->event);
+
+ if (u->defer)
+ c->mainloop->defer_free(u->defer);
+
+ if (u->sink) {
+ pa_sink_disconnect(u->sink);
+ pa_sink_unref(u->sink);
+ }
+
+ if (u->source) {
+ pa_source_disconnect(u->source);
+ pa_source_unref(u->source);
+ }
+
+ if (u->hwi != INVALID_HANDLE_VALUE) {
+ waveInReset(u->hwi);
+ waveInClose(u->hwi);
+ }
+
+ if (u->hwo != INVALID_HANDLE_VALUE) {
+ waveOutReset(u->hwo);
+ waveOutClose(u->hwo);
+ }
+
+ for (i = 0;i < u->fragments;i++) {
+ pa_xfree(u->ihdrs[i].lpData);
+ pa_xfree(u->ohdrs[i].lpData);
+ }
+
+ pa_xfree(u->ihdrs);
+ pa_xfree(u->ohdrs);
+
+ DeleteCriticalSection(&u->crit);
+
+ pa_xfree(u);
+}
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