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-rw-r--r--polyp/pcm_polyp.c748
1 files changed, 0 insertions, 748 deletions
diff --git a/polyp/pcm_polyp.c b/polyp/pcm_polyp.c
deleted file mode 100644
index 44ae35e..0000000
--- a/polyp/pcm_polyp.c
+++ /dev/null
@@ -1,748 +0,0 @@
-/*
- * ALSA <-> Polypaudio PCM I/O plugin
- *
- * Copyright (c) 2006 by Pierre Ossman <ossman@cendio.se>
- *
- * This library 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 2.1 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 Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <stdio.h>
-#include <sys/poll.h>
-
-#include <alsa/asoundlib.h>
-#include <alsa/pcm_external.h>
-
-#include "polyp.h"
-
-typedef struct snd_pcm_polyp {
- snd_pcm_ioplug_t io;
-
- snd_polyp_t *p;
-
- char *device;
-
- /* Since ALSA expects a ring buffer we must do some voodoo. */
- size_t last_size;
- size_t ptr;
-
- size_t offset;
-
- pa_stream *stream;
-
- pa_sample_spec ss;
- unsigned int frame_size;
- pa_buffer_attr buffer_attr;
-} snd_pcm_polyp_t;
-
-static void update_ptr(snd_pcm_polyp_t *pcm)
-{
- size_t size;
-
- if (pcm->io.stream == SND_PCM_STREAM_PLAYBACK)
- size = pa_stream_writable_size(pcm->stream);
- else
- size = pa_stream_readable_size(pcm->stream) - pcm->offset;
-
- if (size > pcm->last_size) {
- pcm->ptr += size - pcm->last_size;
- pcm->ptr %= pcm->buffer_attr.maxlength;
- }
-
- pcm->last_size = size;
-}
-
-static int polyp_start(snd_pcm_ioplug_t *io)
-{
- snd_pcm_polyp_t *pcm = io->private_data;
- pa_operation *o;
- int err = 0;
-
- assert(pcm);
- assert(pcm->p);
-
- pa_threaded_mainloop_lock(pcm->p->mainloop);
-
- assert(pcm->stream);
-
- err = polyp_check_connection(pcm->p);
- if (err < 0)
- goto finish;
-
- o = pa_stream_cork(pcm->stream, 0, polyp_stream_success_cb, pcm->p);
- assert(o);
-
- err = polyp_wait_operation(pcm->p, o);
-
- pa_operation_unref(o);
-
- if (err < 0) {
- err = -EIO;
- goto finish;
- }
-
-finish:
- pa_threaded_mainloop_unlock(pcm->p->mainloop);
-
- return err;
-}
-
-static int polyp_stop(snd_pcm_ioplug_t *io)
-{
- snd_pcm_polyp_t *pcm = io->private_data;
- pa_operation *o;
- int err = 0;
-
- assert(pcm);
- assert(pcm->p);
-
- pa_threaded_mainloop_lock(pcm->p->mainloop);
-
- assert(pcm->stream);
-
- err = polyp_check_connection(pcm->p);
- if (err < 0)
- goto finish;
-
- o = pa_stream_flush(pcm->stream, polyp_stream_success_cb, pcm->p);
- assert(o);
-
- err = polyp_wait_operation(pcm->p, o);
-
- pa_operation_unref(o);
-
- if (err < 0) {
- err = -EIO;
- goto finish;
- }
-
- o = pa_stream_cork(pcm->stream, 1, polyp_stream_success_cb, pcm->p);
- assert(o);
-
- err = polyp_wait_operation(pcm->p, o);
-
- pa_operation_unref(o);
-
- if (err < 0) {
- err = -EIO;
- goto finish;
- }
-
-finish:
- pa_threaded_mainloop_unlock(pcm->p->mainloop);
-
- return err;
-}
-
-int polyp_drain(snd_pcm_ioplug_t *io)
-{
- snd_pcm_polyp_t *pcm = io->private_data;
- pa_operation *o;
- int err = 0;
-
- assert(pcm);
- assert(pcm->p);
-
- pa_threaded_mainloop_lock(pcm->p->mainloop);
-
- assert(pcm->stream);
-
- err = polyp_check_connection(pcm->p);
- if (err < 0)
- goto finish;
-
- o = pa_stream_drain(pcm->stream, polyp_stream_success_cb, pcm->p);
- assert(o);
-
- err = polyp_wait_operation(pcm->p, o);
-
- pa_operation_unref(o);
-
- if (err < 0) {
- err = -EIO;
- goto finish;
- }
-
-finish:
- pa_threaded_mainloop_unlock(pcm->p->mainloop);
-
- return err;
-}
-
-static snd_pcm_sframes_t polyp_pointer(snd_pcm_ioplug_t *io)
-{
- snd_pcm_polyp_t *pcm = io->private_data;
- int err = 0;
-
- assert(pcm);
- assert(pcm->p);
-
- pa_threaded_mainloop_lock(pcm->p->mainloop);
-
- assert(pcm->stream);
-
- err = polyp_check_connection(pcm->p);
- if (err < 0)
- goto finish;
-
- update_ptr(pcm);
-
- err = snd_pcm_bytes_to_frames(io->pcm, pcm->ptr);
-
-finish:
- pa_threaded_mainloop_unlock(pcm->p->mainloop);
-
- return err;
-}
-
-static int polyp_delay(snd_pcm_ioplug_t *io,
- snd_pcm_sframes_t *delayp)
-{
- snd_pcm_polyp_t *pcm = io->private_data;
- int err = 0;
- pa_usec_t lat;
-
- assert(pcm);
- assert(pcm->p);
-
- pa_threaded_mainloop_lock(pcm->p->mainloop);
-
- assert(pcm->stream);
-
- err = polyp_check_connection(pcm->p);
- if (err < 0)
- goto finish;
-
- if (pa_stream_get_latency(pcm->stream, &lat, NULL)) {
- err = -EIO;
- goto finish;
- }
-
- *delayp = snd_pcm_bytes_to_frames(io->pcm, pa_usec_to_bytes(lat, &pcm->ss));
-
-finish:
- pa_threaded_mainloop_unlock(pcm->p->mainloop);
-
- return err;
-}
-
-static snd_pcm_sframes_t polyp_write(snd_pcm_ioplug_t *io,
- const snd_pcm_channel_area_t *areas,
- snd_pcm_uframes_t offset,
- snd_pcm_uframes_t size)
-{
- snd_pcm_polyp_t *pcm = io->private_data;
- const char *buf;
- int err = 0;
-
- assert(pcm);
- assert(pcm->p);
-
- pa_threaded_mainloop_lock(pcm->p->mainloop);
-
- assert(pcm->stream);
-
- err = polyp_check_connection(pcm->p);
- if (err < 0)
- goto finish;
-
- /* Make sure the buffer pointer is in sync */
- update_ptr(pcm);
-
- assert(pcm->last_size >= (size * pcm->frame_size));
-
- buf = (char *)areas->addr + (areas->first + areas->step * offset) / 8;
-
- pa_stream_write(pcm->stream, buf, size * pcm->frame_size, NULL, 0, 0);
-
- /* Make sure the buffer pointer is in sync */
- update_ptr(pcm);
-
- if (pcm->last_size < pcm->buffer_attr.minreq)
- polyp_poll_deactivate(pcm->p);
-
- err = size;
-
-finish:
- pa_threaded_mainloop_unlock(pcm->p->mainloop);
-
- return err;
-}
-
-static snd_pcm_sframes_t polyp_read(snd_pcm_ioplug_t *io,
- const snd_pcm_channel_area_t *areas,
- snd_pcm_uframes_t offset,
- snd_pcm_uframes_t size)
-{
- snd_pcm_polyp_t *pcm = io->private_data;
- void *dst_buf, *src_buf;
- size_t remain_size, frag_length;
- int err = 0;
-
- assert(pcm);
- assert(pcm->p);
-
- pa_threaded_mainloop_lock(pcm->p->mainloop);
-
- assert(pcm->stream);
-
- err = polyp_check_connection(pcm->p);
- if (err < 0)
- goto finish;
-
- /* Make sure the buffer pointer is in sync */
- update_ptr(pcm);
-
- remain_size = size * pcm->frame_size;
-
- dst_buf = (char *)areas->addr + (areas->first + areas->step * offset) / 8;
- while (remain_size > 0) {
- pa_stream_peek(pcm->stream, (const void**)&src_buf, &frag_length);
- if (frag_length == 0)
- break;
-
- src_buf = (char*)src_buf + pcm->offset;
- frag_length -= pcm->offset;
-
- if (frag_length > remain_size) {
- pcm->offset += remain_size;
- frag_length = remain_size;
- } else
- pcm->offset = 0;
-
- memcpy(dst_buf, src_buf, frag_length);
-
- if (pcm->offset == 0)
- pa_stream_drop(pcm->stream);
-
- dst_buf = (char*)dst_buf + frag_length;
- remain_size -= frag_length;
- }
-
- /* Make sure the buffer pointer is in sync */
- update_ptr(pcm);
-
- if (pcm->last_size < pcm->buffer_attr.minreq)
- polyp_poll_deactivate(pcm->p);
-
- err = size - (remain_size / pcm->frame_size);
-
-finish:
- pa_threaded_mainloop_unlock(pcm->p->mainloop);
-
- return err;
-}
-
-static void stream_request_cb(pa_stream *p, size_t length, void *userdata)
-{
- snd_pcm_polyp_t *pcm = userdata;
-
- assert(pcm);
- assert(pcm->p);
-
- polyp_poll_activate(pcm->p);
-}
-
-static int polyp_pcm_poll_descriptors_count(snd_pcm_ioplug_t *io)
-{
- snd_pcm_polyp_t *pcm = io->private_data;
- int count;
-
- assert(pcm);
- assert(pcm->p);
-
- pa_threaded_mainloop_lock(pcm->p->mainloop);
-
- count = polyp_poll_descriptors_count(pcm->p);
-
- pa_threaded_mainloop_unlock(pcm->p->mainloop);
-
- return count;
-}
-
-static int polyp_pcm_poll_descriptors(snd_pcm_ioplug_t *io, struct pollfd *pfd, unsigned int space)
-{
- snd_pcm_polyp_t *pcm = io->private_data;
- int err;
-
- assert(pcm);
- assert(pcm->p);
-
- pa_threaded_mainloop_lock(pcm->p->mainloop);
-
- err = polyp_poll_descriptors(pcm->p, pfd, space);
-
- pa_threaded_mainloop_unlock(pcm->p->mainloop);
-
- return err;
-}
-
-static int polyp_pcm_poll_revents(snd_pcm_ioplug_t *io, struct pollfd *pfd, unsigned int nfds, unsigned short *revents)
-{
- snd_pcm_polyp_t *pcm = io->private_data;
- int err = 0;
-
- assert(pcm);
- assert(pcm->p);
-
- pa_threaded_mainloop_lock(pcm->p->mainloop);
-
- err = polyp_poll_revents(pcm->p, pfd, nfds, revents);
- if (err < 0)
- goto finish;
-
- *revents = 0;
-
- /*
- * Make sure we have an up-to-date value.
- */
- update_ptr(pcm);
-
- /*
- * ALSA thinks in periods, not bytes, samples or frames.
- */
- if (pcm->last_size >= pcm->buffer_attr.minreq) {
- if (io->stream == SND_PCM_STREAM_PLAYBACK)
- *revents |= POLLOUT;
- else
- *revents |= POLLIN;
- }
-
-finish:
- pa_threaded_mainloop_unlock(pcm->p->mainloop);
-
- return err;
-}
-
-static int polyp_prepare(snd_pcm_ioplug_t *io)
-{
- pa_channel_map map;
- snd_pcm_polyp_t *pcm = io->private_data;
- int err = 0;
-
- assert(pcm);
- assert(pcm->p);
-
- pa_threaded_mainloop_lock(pcm->p->mainloop);
-
- if (pcm->stream) {
- pa_stream_disconnect(pcm->stream);
- polyp_wait_stream_state(pcm->p, pcm->stream, PA_STREAM_TERMINATED);
- pa_stream_unref(pcm->stream);
- pcm->stream = NULL;
- }
-
- err = polyp_check_connection(pcm->p);
- if (err < 0)
- goto finish;
-
- assert(pcm->stream == NULL);
-
- if (io->stream == SND_PCM_STREAM_PLAYBACK)
- pcm->stream = pa_stream_new(pcm->p->context, "ALSA Playback", &pcm->ss,
- pa_channel_map_init_auto(&map, pcm->ss.channels, PA_CHANNEL_MAP_ALSA));
- else
- pcm->stream = pa_stream_new(pcm->p->context, "ALSA Capture", &pcm->ss,
- pa_channel_map_init_auto(&map, pcm->ss.channels, PA_CHANNEL_MAP_ALSA));
- assert(pcm->stream);
-
- pa_stream_set_state_callback(pcm->stream, polyp_stream_state_cb, pcm->p);
-
- if (io->stream == SND_PCM_STREAM_PLAYBACK) {
- pa_stream_set_write_callback(pcm->stream, stream_request_cb, pcm);
- pa_stream_connect_playback(pcm->stream, pcm->device, &pcm->buffer_attr,
- PA_STREAM_AUTO_TIMING_UPDATE | PA_STREAM_INTERPOLATE_TIMING, NULL, NULL);
- } else {
- pa_stream_set_read_callback(pcm->stream, stream_request_cb, pcm);
- pa_stream_connect_record(pcm->stream, pcm->device, &pcm->buffer_attr,
- PA_STREAM_AUTO_TIMING_UPDATE | PA_STREAM_INTERPOLATE_TIMING);
- }
-
- err = polyp_wait_stream_state(pcm->p, pcm->stream, PA_STREAM_READY);
- if (err < 0) {
- fprintf(stderr, "*** POLYPAUDIO: Unable to create stream.\n");
- pa_stream_unref(pcm->stream);
- pcm->stream = NULL;
- goto finish;
- }
-
- pcm->last_size = 0;
- pcm->ptr = 0;
- pcm->offset = 0;
-
-finish:
- pa_threaded_mainloop_unlock(pcm->p->mainloop);
-
- return err;
-}
-
-static int polyp_hw_params(snd_pcm_ioplug_t *io, snd_pcm_hw_params_t *params)
-{
- snd_pcm_polyp_t *pcm = io->private_data;
- int err = 0;
-
- assert(pcm);
- assert(pcm->p);
-
- pa_threaded_mainloop_lock(pcm->p->mainloop);
-
- assert(!pcm->stream);
-
- pcm->frame_size = (snd_pcm_format_physical_width(io->format) * io->channels) / 8;
-
- switch (io->format) {
- case SND_PCM_FORMAT_U8:
- pcm->ss.format = PA_SAMPLE_U8;
- break;
- case SND_PCM_FORMAT_A_LAW:
- pcm->ss.format = PA_SAMPLE_ALAW;
- break;
- case SND_PCM_FORMAT_MU_LAW:
- pcm->ss.format = PA_SAMPLE_ULAW;
- break;
- case SND_PCM_FORMAT_S16_LE:
- pcm->ss.format = PA_SAMPLE_S16LE;
- break;
- case SND_PCM_FORMAT_S16_BE:
- pcm->ss.format = PA_SAMPLE_S16BE;
- break;
- case SND_PCM_FORMAT_FLOAT_LE:
- pcm->ss.format = PA_SAMPLE_FLOAT32LE;
- break;
- case SND_PCM_FORMAT_FLOAT_BE:
- pcm->ss.format = PA_SAMPLE_FLOAT32BE;
- break;
- default:
- fprintf(stderr, "*** POLYPAUDIO: unsupported format %s\n",
- snd_pcm_format_name(io->format));
- err = -EINVAL;
- goto finish;
- }
-
- pcm->ss.rate = io->rate;
- pcm->ss.channels = io->channels;
-
- pcm->buffer_attr.maxlength = io->buffer_size * pcm->frame_size;
- pcm->buffer_attr.tlength = io->buffer_size * pcm->frame_size;
- pcm->buffer_attr.prebuf = io->period_size * pcm->frame_size;
- pcm->buffer_attr.minreq = io->period_size * pcm->frame_size;
- pcm->buffer_attr.fragsize = io->period_size * pcm->frame_size;
-
-finish:
- pa_threaded_mainloop_unlock(pcm->p->mainloop);
-
- return err;
-}
-
-static int polyp_close(snd_pcm_ioplug_t *io)
-{
- snd_pcm_polyp_t *pcm = io->private_data;
-
- assert(pcm);
-
- pa_threaded_mainloop_lock(pcm->p->mainloop);
-
- if (pcm->stream) {
- pa_stream_disconnect(pcm->stream);
- polyp_wait_stream_state(pcm->p, pcm->stream, PA_STREAM_TERMINATED);
- pa_stream_unref(pcm->stream);
- }
-
- pa_threaded_mainloop_unlock(pcm->p->mainloop);
-
- if (pcm->p)
- polyp_free(pcm->p);
-
- if (pcm->device)
- free(pcm->device);
-
- free(pcm);
-
- return 0;
-}
-
-static snd_pcm_ioplug_callback_t polyp_playback_callback = {
- .start = polyp_start,
- .stop = polyp_stop,
- .drain = polyp_drain,
- .pointer = polyp_pointer,
- .transfer = polyp_write,
- .delay = polyp_delay,
- .poll_descriptors_count = polyp_pcm_poll_descriptors_count,
- .poll_descriptors = polyp_pcm_poll_descriptors,
- .poll_revents = polyp_pcm_poll_revents,
- .prepare = polyp_prepare,
- .hw_params = polyp_hw_params,
- .close = polyp_close,
-};
-
-
-static snd_pcm_ioplug_callback_t polyp_capture_callback = {
- .start = polyp_start,
- .stop = polyp_stop,
- .pointer = polyp_pointer,
- .transfer = polyp_read,
- .delay = polyp_delay,
- .poll_descriptors_count = polyp_pcm_poll_descriptors_count,
- .poll_descriptors = polyp_pcm_poll_descriptors,
- .poll_revents = polyp_pcm_poll_revents,
- .prepare = polyp_prepare,
- .hw_params = polyp_hw_params,
- .close = polyp_close,
-};
-
-
-static int polyp_hw_constraint(snd_pcm_polyp_t *pcm)
-{
- snd_pcm_ioplug_t *io = &pcm->io;
-
- static const snd_pcm_access_t access_list[] = {
- SND_PCM_ACCESS_RW_INTERLEAVED
- };
- static const unsigned int formats[] = {
- SND_PCM_FORMAT_U8,
- SND_PCM_FORMAT_A_LAW,
- SND_PCM_FORMAT_MU_LAW,
- SND_PCM_FORMAT_S16_LE,
- SND_PCM_FORMAT_S16_BE,
- SND_PCM_FORMAT_FLOAT_LE,
- SND_PCM_FORMAT_FLOAT_BE
- };
-
- int err;
-
- err = snd_pcm_ioplug_set_param_list(io, SND_PCM_IOPLUG_HW_ACCESS,
- ARRAY_SIZE(access_list), access_list);
- if (err < 0)
- return err;
-
- err = snd_pcm_ioplug_set_param_list(io, SND_PCM_IOPLUG_HW_FORMAT,
- ARRAY_SIZE(formats), formats);
- if (err < 0)
- return err;
-
- err = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_CHANNELS,
- 1, PA_CHANNELS_MAX);
- if (err < 0)
- return err;
-
- /* FIXME: Investigate actual min and max */
- err = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_RATE,
- 8000, 48000);
- if (err < 0)
- return err;
-
- err = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_RATE,
- 8000, 48000);
- if (err < 0)
- return err;
-
- err = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_PERIOD_BYTES,
- 1, 4294967295U);
- if (err < 0)
- return err;
-
- err = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_PERIODS,
- 2, 4294967295U);
- if (err < 0)
- return err;
-
- err = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_BUFFER_BYTES,
- 1, 4294967295U);
- if (err < 0)
- return err;
-
- return 0;
-}
-
-SND_PCM_PLUGIN_DEFINE_FUNC(polyp)
-{
- snd_config_iterator_t i, next;
- const char *server = NULL;
- const char *device = NULL;
- int err;
- snd_pcm_polyp_t *pcm;
-
- snd_config_for_each(i, next, conf) {
- snd_config_t *n = snd_config_iterator_entry(i);
- const char *id;
- if (snd_config_get_id(n, &id) < 0)
- continue;
- if (strcmp(id, "comment") == 0 || strcmp(id, "type") == 0)
- continue;
- if (strcmp(id, "server") == 0) {
- if (snd_config_get_string(n, &server) < 0) {
- SNDERR("Invalid type for %s", id);
- return -EINVAL;
- }
- continue;
- }
- if (strcmp(id, "device") == 0) {
- if (snd_config_get_string(n, &device) < 0) {
- SNDERR("Invalid type for %s", id);
- return -EINVAL;
- }
- continue;
- }
- SNDERR("Unknown field %s", id);
- return -EINVAL;
- }
-
- pcm = calloc(1, sizeof(*pcm));
-
- if (device)
- pcm->device = strdup(device);
-
- pcm->p = polyp_new();
- if (!pcm->p) {
- err = -EIO;
- goto error;
- }
-
- err = polyp_connect(pcm->p, server);
- if (err < 0)
- goto error;
-
- pcm->io.version = SND_PCM_IOPLUG_VERSION;
- pcm->io.name = "ALSA <-> Polypaudio PCM I/O Plugin";
- pcm->io.poll_fd = -1;
- pcm->io.poll_events = 0;
- pcm->io.mmap_rw = 0;
- pcm->io.callback = stream == SND_PCM_STREAM_PLAYBACK ?
- &polyp_playback_callback : &polyp_capture_callback;
- pcm->io.private_data = pcm;
-
- err = snd_pcm_ioplug_create(&pcm->io, name, stream, mode);
- if (err < 0)
- goto error;
-
- err = polyp_hw_constraint(pcm);
- if (err < 0) {
- snd_pcm_ioplug_delete(&pcm->io);
- goto error;
- }
-
- *pcmp = pcm->io.pcm;
- return 0;
-
-error:
- if (pcm->p)
- polyp_free(pcm->p);
-
- free(pcm);
-
- return err;
-}
-
-SND_PCM_PLUGIN_SYMBOL(polyp);
generated by cgit (git 2.34.1) at 2025-06-16 21:31:01 +0000