more hacking

Move plugin API to separate directory for now
Add ringbuffer and way to get ringbuffer from a port

spa/plugins/alsa/alsa-sink.c

@@ -0,0 +1,587 @@
+/* Spa ALSA Sink
+ * Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include <stddef.h>
+
+#include <asoundlib.h>
+#include <pthread.h>
+
+#include <spa/node.h>
+#include <spa/audio/raw.h>
+
+typedef struct _SpaALSASink SpaALSASink;
+
+static const char default_device[] = "default";
+static const uint32_t default_buffer_time = 10000;
+static const uint32_t default_period_time = 5000;
+static const bool default_period_event = 0;
+
+typedef struct {
+  SpaProps props;
+  char device[64];
+  char device_name[128];
+  char card_name[128];
+  uint32_t buffer_time;
+  uint32_t period_time;
+  bool period_event;
+} SpaALSASinkProps;
+
+static void
+reset_alsa_sink_props (SpaALSASinkProps *props)
+{
+  strncpy (props->device, default_device, 64);
+  props->buffer_time = default_buffer_time;
+  props->period_time = default_period_time;
+  props->period_event = default_period_event;
+}
+
+typedef struct {
+  snd_pcm_t *handle;
+  snd_output_t *output;
+  snd_pcm_sframes_t buffer_size;
+  snd_pcm_sframes_t period_size;
+  snd_pcm_channel_area_t areas[16];
+  pthread_t thread;
+  bool running;
+} SpaALSAState;
+
+typedef struct _ALSABuffer ALSABuffer;
+
+struct _ALSABuffer {
+  SpaBuffer buffer;
+  SpaMeta meta[1];
+  SpaMetaHeader header;
+  SpaData data[1];
+  ALSABuffer *next;
+};
+
+struct _SpaALSASink {
+  SpaHandle handle;
+
+  SpaALSASinkProps tmp_props;
+  SpaALSASinkProps props;
+
+  bool activated;
+
+  SpaEventCallback event_cb;
+  void *user_data;
+
+  bool have_format;
+  SpaAudioRawFormat query_format;
+  SpaAudioRawFormat current_format;
+
+  SpaALSAState state;
+
+  SpaPortInfo info;
+  SpaPortStatus status;
+
+  SpaBuffer *input_buffer;
+
+  ALSABuffer buffer;
+};
+
+#include "alsa-utils.c"
+
+static const uint32_t min_uint32 = 1;
+static const uint32_t max_uint32 = UINT32_MAX;
+
+static const SpaPropRangeInfo uint32_range[] = {
+  { "min", "Minimum value", 4, &min_uint32 },
+  { "max", "Maximum value", 4, &max_uint32 },
+};
+
+enum {
+  PROP_ID_DEVICE,
+  PROP_ID_DEVICE_NAME,
+  PROP_ID_CARD_NAME,
+  PROP_ID_BUFFER_TIME,
+  PROP_ID_PERIOD_TIME,
+  PROP_ID_PERIOD_EVENT,
+  PROP_ID_LAST,
+};
+
+static const SpaPropInfo prop_info[] =
+{
+  { PROP_ID_DEVICE,            "device", "ALSA device, as defined in an asound configuration file",
+                                SPA_PROP_FLAG_READWRITE,
+                                SPA_PROP_TYPE_STRING, 63,
+                                strlen (default_device)+1, default_device,
+                                SPA_PROP_RANGE_TYPE_NONE, 0, NULL,
+                                NULL,
+                                offsetof (SpaALSASinkProps, device),
+                                0, 0,
+                                NULL },
+  { PROP_ID_DEVICE_NAME,       "device-name", "Human-readable name of the sound device",
+                                SPA_PROP_FLAG_READABLE,
+                                SPA_PROP_TYPE_STRING, 127,
+                                0, NULL,
+                                SPA_PROP_RANGE_TYPE_NONE, 0, NULL,
+                                NULL,
+                                offsetof (SpaALSASinkProps, device_name),
+                                0, 0,
+                                NULL },
+  { PROP_ID_CARD_NAME,         "card-name", "Human-readable name of the sound card",
+                                SPA_PROP_FLAG_READABLE,
+                                SPA_PROP_TYPE_STRING, 127,
+                                0, NULL,
+                                SPA_PROP_RANGE_TYPE_NONE, 0, NULL,
+                                NULL,
+                                offsetof (SpaALSASinkProps, card_name),
+                                0, 0,
+                                NULL },
+  { PROP_ID_BUFFER_TIME,       "buffer-time", "The total size of the buffer in time",
+                                SPA_PROP_FLAG_READWRITE,
+                                SPA_PROP_TYPE_UINT32, sizeof (uint32_t),
+                                sizeof (uint32_t), &default_buffer_time,
+                                SPA_PROP_RANGE_TYPE_MIN_MAX, 2, uint32_range,
+                                NULL,
+                                offsetof (SpaALSASinkProps, buffer_time),
+                                0, 0,
+                                NULL },
+  { PROP_ID_PERIOD_TIME,       "period-time", "The size of a period in time",
+                                SPA_PROP_FLAG_READWRITE,
+                                SPA_PROP_TYPE_UINT32, sizeof (uint32_t),
+                                sizeof (uint32_t), &default_period_time,
+                                SPA_PROP_RANGE_TYPE_MIN_MAX, 2, uint32_range,
+                                NULL,
+                                offsetof (SpaALSASinkProps, period_time),
+                                0, 0,
+                                NULL },
+  { PROP_ID_PERIOD_EVENT,      "period-event", "Generate an event each period",
+                                SPA_PROP_FLAG_READWRITE,
+                                SPA_PROP_TYPE_BOOL, sizeof (bool),
+                                sizeof (bool), &default_period_event,
+                                SPA_PROP_RANGE_TYPE_NONE, 0, NULL,
+                                NULL,
+                                offsetof (SpaALSASinkProps, period_event),
+                                0, 0,
+                                NULL },
+};
+
+static SpaResult
+spa_alsa_sink_node_get_props (SpaHandle     *handle,
+                              SpaProps     **props)
+{
+  SpaALSASink *this = (SpaALSASink *) handle;
+
+  if (handle == NULL || props == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  memcpy (&this->tmp_props, &this->props, sizeof (this->props));
+  *props = &this->tmp_props.props;
+
+  return SPA_RESULT_OK;
+}
+
+static SpaResult
+spa_alsa_sink_node_set_props (SpaHandle       *handle,
+                              const SpaProps  *props)
+{
+  SpaALSASink *this = (SpaALSASink *) handle;
+  SpaALSASinkProps *p = &this->props;
+  SpaResult res;
+
+  if (handle == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  if (props == NULL) {
+    reset_alsa_sink_props (p);
+    return SPA_RESULT_OK;
+  }
+
+  res = spa_props_copy (props, &p->props);
+
+  return res;
+}
+
+static SpaResult
+spa_alsa_sink_node_send_command (SpaHandle     *handle,
+                                 SpaCommand    *command)
+{
+  SpaALSASink *this = (SpaALSASink *) handle;
+
+  if (handle == NULL || command == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  switch (command->type) {
+    case SPA_COMMAND_INVALID:
+      return SPA_RESULT_INVALID_COMMAND;
+
+    case SPA_COMMAND_ACTIVATE:
+      if (!this->activated) {
+        spa_alsa_open (this);
+        this->activated = true;
+      }
+      if (this->event_cb) {
+        SpaEvent event;
+
+        event.refcount = 1;
+        event.notify = NULL;
+        event.type = SPA_EVENT_TYPE_ACTIVATED;
+        event.port_id = -1;
+        event.data = NULL;
+        event.size = 0;
+
+        this->event_cb (handle, &event, this->user_data);
+      }
+      break;
+    case SPA_COMMAND_DEACTIVATE:
+      if (this->activated) {
+        spa_alsa_close (this);
+        this->activated = false;
+      }
+      if (this->event_cb) {
+        SpaEvent event;
+
+        event.refcount = 1;
+        event.notify = NULL;
+        event.type = SPA_EVENT_TYPE_DEACTIVATED;
+        event.port_id = -1;
+        event.data = NULL;
+        event.size = 0;
+
+        this->event_cb (handle, &event, this->user_data);
+      }
+      break;
+    case SPA_COMMAND_START:
+      spa_alsa_start (this);
+      break;
+    case SPA_COMMAND_STOP:
+      spa_alsa_stop (this);
+      break;
+    case SPA_COMMAND_FLUSH:
+    case SPA_COMMAND_DRAIN:
+    case SPA_COMMAND_MARKER:
+      return SPA_RESULT_NOT_IMPLEMENTED;
+  }
+  return SPA_RESULT_OK;
+}
+
+static SpaResult
+spa_alsa_sink_node_set_event_callback (SpaHandle     *handle,
+                                       SpaEventCallback event,
+                                       void          *user_data)
+{
+  SpaALSASink *this = (SpaALSASink *) handle;
+
+  if (handle == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  this->event_cb = event;
+  this->user_data = user_data;
+
+  return SPA_RESULT_OK;
+}
+
+static SpaResult
+spa_alsa_sink_node_get_n_ports (SpaHandle     *handle,
+                                unsigned int  *n_input_ports,
+                                unsigned int  *max_input_ports,
+                                unsigned int  *n_output_ports,
+                                unsigned int  *max_output_ports)
+{
+  if (handle == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  if (n_input_ports)
+    *n_input_ports = 1;
+  if (n_output_ports)
+    *n_output_ports = 0;
+  if (max_input_ports)
+    *max_input_ports = 1;
+  if (max_output_ports)
+    *max_output_ports = 0;
+
+  return SPA_RESULT_OK;
+}
+
+static SpaResult
+spa_alsa_sink_node_get_port_ids (SpaHandle     *handle,
+                                 unsigned int   n_input_ports,
+                                 uint32_t      *input_ids,
+                                 unsigned int   n_output_ports,
+                                 uint32_t      *output_ids)
+{
+  if (handle == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  if (n_input_ports > 0)
+    input_ids[0] = 0;
+
+  return SPA_RESULT_OK;
+}
+
+
+static SpaResult
+spa_alsa_sink_node_add_port (SpaHandle      *handle,
+                             SpaDirection    direction,
+                             uint32_t       *port_id)
+{
+  return SPA_RESULT_NOT_IMPLEMENTED;
+}
+
+static SpaResult
+spa_alsa_sink_node_remove_port (SpaHandle      *handle,
+                                uint32_t        port_id)
+{
+  return SPA_RESULT_NOT_IMPLEMENTED;
+}
+
+static SpaResult
+spa_alsa_sink_node_enum_port_formats (SpaHandle       *handle,
+                                      uint32_t         port_id,
+                                      unsigned int     index,
+                                      SpaFormat      **format)
+{
+  SpaALSASink *this = (SpaALSASink *) handle;
+
+  if (handle == NULL || format == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  if (port_id != 0)
+    return SPA_RESULT_INVALID_PORT;
+
+  switch (index) {
+    case 0:
+      spa_audio_raw_format_init (&this->query_format);
+      break;
+    case 1:
+      spa_audio_raw_format_init (&this->query_format);
+      break;
+    default:
+      return SPA_RESULT_ENUM_END;
+  }
+  *format = &this->query_format.format;
+
+  return SPA_RESULT_OK;
+}
+
+static SpaResult
+spa_alsa_sink_node_set_port_format (SpaHandle       *handle,
+                                    uint32_t         port_id,
+                                    int              test_only,
+                                    const SpaFormat *format)
+{
+  SpaALSASink *this = (SpaALSASink *) handle;
+  SpaResult res;
+
+  if (handle == NULL || format == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  if (port_id != 0)
+    return SPA_RESULT_INVALID_PORT;
+
+  if (format == NULL) {
+    this->have_format = false;
+    return SPA_RESULT_OK;
+  }
+
+  if ((res = spa_audio_raw_format_parse (format, &this->current_format)) < 0)
+    return res;
+
+  printf ("format %d\n", this->current_format.info.rate);
+
+  this->have_format = true;
+
+  return SPA_RESULT_OK;
+}
+
+static SpaResult
+spa_alsa_sink_node_get_port_format (SpaHandle        *handle,
+                                    uint32_t          port_id,
+                                    const SpaFormat **format)
+{
+  SpaALSASink *this = (SpaALSASink *) handle;
+
+  if (handle == NULL || format == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  if (port_id != 0)
+    return SPA_RESULT_INVALID_PORT;
+
+  if (!this->have_format)
+    return SPA_RESULT_NO_FORMAT;
+
+  *format = &this->current_format.format;
+
+  return SPA_RESULT_OK;
+}
+
+static SpaResult
+spa_alsa_sink_node_get_port_info (SpaHandle          *handle,
+                                  uint32_t            port_id,
+                                  const SpaPortInfo **info)
+{
+  SpaALSASink *this = (SpaALSASink *) handle;
+
+  if (handle == NULL || info == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  if (port_id != 0)
+    return SPA_RESULT_INVALID_PORT;
+
+  *info = &this->info;
+
+  return SPA_RESULT_OK;
+}
+
+static SpaResult
+spa_alsa_sink_node_get_port_props (SpaHandle  *handle,
+                                   uint32_t    port_id,
+                                   SpaProps  **props)
+{
+  return SPA_RESULT_NOT_IMPLEMENTED;
+}
+
+static SpaResult
+spa_alsa_sink_node_set_port_props (SpaHandle       *handle,
+                                   uint32_t         port_id,
+                                   const SpaProps  *props)
+{
+  return SPA_RESULT_NOT_IMPLEMENTED;
+}
+
+static SpaResult
+spa_alsa_sink_node_get_port_status (SpaHandle            *handle,
+                                    uint32_t              port_id,
+                                    const SpaPortStatus **status)
+{
+  SpaALSASink *this = (SpaALSASink *) handle;
+
+  if (handle == NULL || status == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  if (port_id != 0)
+    return SPA_RESULT_INVALID_PORT;
+
+  *status = &this->status;
+
+  return SPA_RESULT_OK;
+}
+
+static SpaResult
+spa_alsa_sink_node_push_port_input (SpaHandle      *handle,
+                                    unsigned int    n_info,
+                                    SpaInputInfo   *info)
+{
+  SpaALSASink *this = (SpaALSASink *) handle;
+  unsigned int i;
+  bool have_error = false, have_enough = false;
+
+  if (handle == NULL || n_info == 0 || info == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  for (i = 0; i < n_info; i++) {
+    if (info[i].port_id != 0) {
+      info[i].status = SPA_RESULT_INVALID_PORT;
+      have_error = true;
+      continue;
+    }
+
+    if (info[i].buffer != NULL) {
+      if (!this->have_format) {
+        info[i].status = SPA_RESULT_NO_FORMAT;
+        have_error = true;
+        continue;
+      }
+
+      if (this->input_buffer != NULL) {
+        info[i].status = SPA_RESULT_HAVE_ENOUGH_INPUT;
+        have_enough = true;
+        continue;
+      }
+      this->input_buffer = spa_buffer_ref (info[i].buffer);
+    }
+    info[i].status = SPA_RESULT_OK;
+  }
+  if (have_error)
+    return SPA_RESULT_ERROR;
+  if (have_enough)
+    return SPA_RESULT_HAVE_ENOUGH_INPUT;
+
+  return SPA_RESULT_OK;
+}
+
+static SpaResult
+spa_alsa_sink_node_pull_port_output (SpaHandle      *handle,
+                                     unsigned int    n_info,
+                                     SpaOutputInfo  *info)
+{
+  return SPA_RESULT_INVALID_PORT;
+}
+
+static const SpaNode alsasink_node = {
+  sizeof (SpaNode),
+  spa_alsa_sink_node_get_props,
+  spa_alsa_sink_node_set_props,
+  spa_alsa_sink_node_send_command,
+  spa_alsa_sink_node_set_event_callback,
+  spa_alsa_sink_node_get_n_ports,
+  spa_alsa_sink_node_get_port_ids,
+  spa_alsa_sink_node_add_port,
+  spa_alsa_sink_node_remove_port,
+  spa_alsa_sink_node_enum_port_formats,
+  spa_alsa_sink_node_set_port_format,
+  spa_alsa_sink_node_get_port_format,
+  spa_alsa_sink_node_get_port_info,
+  spa_alsa_sink_node_get_port_props,
+  spa_alsa_sink_node_set_port_props,
+  spa_alsa_sink_node_get_port_status,
+  spa_alsa_sink_node_push_port_input,
+  spa_alsa_sink_node_pull_port_output,
+};
+
+static SpaResult
+spa_alsa_sink_get_interface (SpaHandle               *handle,
+                             uint32_t                 interface_id,
+                             const void             **interface)
+{
+  if (handle == NULL || interface == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  switch (interface_id) {
+    case SPA_INTERFACE_ID_NODE:
+      *interface = &alsasink_node;
+      break;
+    default:
+      return SPA_RESULT_UNKNOWN_INTERFACE;
+  }
+  return SPA_RESULT_OK;
+}
+
+SpaHandle *
+spa_alsa_sink_new (void)
+{
+  SpaHandle *handle;
+  SpaALSASink *this;
+
+  handle = calloc (1, sizeof (SpaALSASink));
+  handle->get_interface = spa_alsa_sink_get_interface;
+
+  this = (SpaALSASink *) handle;
+  this->props.props.n_prop_info = PROP_ID_LAST;
+  this->props.props.prop_info = prop_info;
+  this->props.props.set_prop = spa_props_generic_set_prop;
+  this->props.props.get_prop = spa_props_generic_get_prop;
+  reset_alsa_sink_props (&this->props);
+
+  this->info.flags = SPA_PORT_INFO_FLAG_NONE;
+  this->status.flags = SPA_PORT_STATUS_FLAG_NEED_INPUT;
+  return handle;
+}