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Original commit message from CVS: 2005-09-02 Andy Wingo <wingo@pobox.com> * All plugins updated for element state changes.
449 lines
13 KiB
C
449 lines
13 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wim.taymans@chello.be>
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*
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* gstosxaudioelement.c:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <CoreAudio/CoreAudio.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include "gstosxaudioelement.h"
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enum
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{
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ARG_0,
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ARG_DEVICE
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};
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/* elementfactory information */
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static GstElementDetails gst_osxaudioelement_details =
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GST_ELEMENT_DETAILS ("Audio Mixer (OSX)",
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"Generic/Audio",
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"Mac OS X audio mixer element",
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"Zaheer Abbas Merali <zaheerabbas at merali dot org>");
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static void gst_osxaudioelement_base_init (GstOsxAudioElementClass * klass);
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static void gst_osxaudioelement_class_init (GstOsxAudioElementClass * klass);
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static void gst_osxaudioelement_init (GstOsxAudioElement * osxaudio);
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static void gst_osxaudioelement_dispose (GObject * object);
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static void gst_osxaudioelement_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_osxaudioelement_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static GstStateChangeReturn gst_osxaudioelement_change_state (GstElement *
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element);
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static GstElementClass *parent_class = NULL;
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GType
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gst_osxaudioelement_get_type (void)
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{
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static GType osxaudioelement_type = 0;
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if (!osxaudioelement_type) {
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static const GTypeInfo osxaudioelement_info = {
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sizeof (GstOsxAudioElementClass),
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(GBaseInitFunc) gst_osxaudioelement_base_init,
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NULL,
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(GClassInitFunc) gst_osxaudioelement_class_init,
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NULL,
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NULL,
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sizeof (GstOsxAudioElement),
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0,
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(GInstanceInitFunc) gst_osxaudioelement_init
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};
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osxaudioelement_type = g_type_register_static (GST_TYPE_ELEMENT,
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"GstOsxAudioElement", &osxaudioelement_info, 0);
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}
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return osxaudioelement_type;
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}
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static void
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gst_osxaudioelement_base_init (GstOsxAudioElementClass * klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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klass->device_combinations = NULL;
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gst_element_class_set_details (element_class, &gst_osxaudioelement_details);
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}
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static void
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gst_osxaudioelement_class_init (GstOsxAudioElementClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DEVICE,
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g_param_spec_int ("device", "Device index",
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"Mac OS X CoreAudio Device Index (0 usually)", 0, G_MAXINT, 0,
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G_PARAM_READWRITE));
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gobject_class->set_property = gst_osxaudioelement_set_property;
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gobject_class->get_property = gst_osxaudioelement_get_property;
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gobject_class->dispose = gst_osxaudioelement_dispose;
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gstelement_class->change_state = gst_osxaudioelement_change_state;
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}
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static void
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gst_osxaudioelement_init (GstOsxAudioElement * osxaudio)
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{
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OSStatus status;
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UInt32 propertySize;
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pthread_mutex_init (&osxaudio->buffer_mutex, NULL);
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pthread_mutex_unlock (&osxaudio->buffer_mutex);
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propertySize = sizeof (osxaudio->device_id);
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status =
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AudioHardwareGetProperty (kAudioHardwarePropertyDefaultOutputDevice,
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&propertySize, &(osxaudio->device_id));
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if (status) {
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GST_DEBUG ("AudioHardwareGetProperty returned %d\n", (int) status);
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}
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if (osxaudio->device_id == kAudioDeviceUnknown) {
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GST_DEBUG ("AudioHardwareGetProperty: device_id is kAudioDeviceUnknown\n");
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}
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/* get requested buffer length */
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propertySize = sizeof (osxaudio->buffer_len);
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status =
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AudioDeviceGetProperty (osxaudio->device_id, 0, false,
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kAudioDevicePropertyBufferSize, &propertySize, &osxaudio->buffer_len);
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if (status) {
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GST_DEBUG
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("AudioDeviceGetProperty returned %d when getting kAudioDevicePropertyBufferSize\n",
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(int) status);
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}
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GST_DEBUG ("%5d osxaudio->buffer_len\n", (int) osxaudio->buffer_len);
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}
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static void
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gst_osxaudioelement_dispose (GObject * object)
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{
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/* GstOsxAudioElement *osxaudio = (GstOsxAudioElement *) object; */
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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/* General purpose Ring-buffering routines */
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int
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write_buffer (GstOsxAudioElement * osxaudio, unsigned char *data, int len)
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{
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int len2 = 0;
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int x;
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while (len > 0) {
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if (osxaudio->full_buffers == NUM_BUFS) {
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GST_DEBUG ("Buffer overrun\n");
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break;
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}
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x = osxaudio->buffer_len - osxaudio->buf_write_pos;
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if (x > len)
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x = len;
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memcpy (osxaudio->buffer[osxaudio->buf_write] + osxaudio->buf_write_pos,
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data + len2, x);
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/* accessing common variables, locking mutex */
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pthread_mutex_lock (&osxaudio->buffer_mutex);
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len2 += x;
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len -= x;
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osxaudio->buffered_bytes += x;
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osxaudio->buf_write_pos += x;
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if (osxaudio->buf_write_pos >= osxaudio->buffer_len) {
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/* block is full, find next! */
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osxaudio->buf_write = (osxaudio->buf_write + 1) % NUM_BUFS;
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++osxaudio->full_buffers;
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osxaudio->buf_write_pos = 0;
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}
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pthread_mutex_unlock (&osxaudio->buffer_mutex);
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}
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return len2;
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}
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int
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read_buffer (GstOsxAudioElement * osxaudio, unsigned char *data)
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{
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int len2 = 0;
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int len = osxaudio->buffer_len;
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int x;
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while (len > 0) {
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if (osxaudio->full_buffers == 0) {
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GST_DEBUG ("Buffer underrun\n");
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break;
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}
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x = osxaudio->buffer_len - osxaudio->buf_read_pos;
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if (x > len)
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x = len;
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memcpy (data + len2,
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osxaudio->buffer[osxaudio->buf_read] + osxaudio->buf_read_pos, x);
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len2 += x;
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len -= x;
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/* accessing common variables, locking mutex */
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pthread_mutex_lock (&osxaudio->buffer_mutex);
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osxaudio->buffered_bytes -= x;
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osxaudio->buf_read_pos += x;
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if (osxaudio->buf_read_pos >= osxaudio->buffer_len) {
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/* block is empty, find next! */
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osxaudio->buf_read = (osxaudio->buf_read + 1) % NUM_BUFS;
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--osxaudio->full_buffers;
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osxaudio->buf_read_pos = 0;
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}
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pthread_mutex_unlock (&osxaudio->buffer_mutex);
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}
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return len2;
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}
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/* The function that the CoreAudio thread calls when it has data */
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OSStatus
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inputAudioDeviceIOProc (AudioDeviceID inDevice, const AudioTimeStamp * inNow,
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const AudioBufferList * inInputData, const AudioTimeStamp * inInputTime,
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AudioBufferList * outOutputData, const AudioTimeStamp * inOutputTime,
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void *inClientData)
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{
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GstOsxAudioElement *osxaudio = GST_OSXAUDIOELEMENT (inClientData);
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write_buffer (GST_OSXAUDIOELEMENT (osxaudio),
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(char *) inInputData->mBuffers[0].mData, osxaudio->buffer_len);
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return 0;
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}
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/* The function that the CoreAudio thread calls when it wants more data */
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OSStatus
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outputAudioDeviceIOProc (AudioDeviceID inDevice, const AudioTimeStamp * inNow,
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const AudioBufferList * inInputData, const AudioTimeStamp * inInputTime,
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AudioBufferList * outOutputData, const AudioTimeStamp * inOutputTime,
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void *inClientData)
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{
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GstOsxAudioElement *osxaudio = GST_OSXAUDIOELEMENT (inClientData);
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outOutputData->mBuffers[0].mDataByteSize =
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read_buffer (osxaudio, (char *) outOutputData->mBuffers[0].mData);
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return 0;
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}
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static gboolean
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gst_osxaudioelement_open_audio (GstOsxAudioElement * osxaudio, gboolean input)
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{
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int i;
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OSErr status;
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GST_INFO ("osxaudioelement: attempting to open sound device");
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/* Allocate ring-buffer memory */
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for (i = 0; i < NUM_BUFS; i++)
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osxaudio->buffer[i] = (unsigned char *) malloc (osxaudio->buffer_len);
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if (input) {
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status =
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AudioDeviceAddIOProc (osxaudio->device_id, inputAudioDeviceIOProc,
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osxaudio);
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} else {
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/* Set the IO proc that CoreAudio will call when it needs data */
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status =
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AudioDeviceAddIOProc (osxaudio->device_id, outputAudioDeviceIOProc,
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osxaudio);
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}
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if (status) {
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GST_DEBUG ("AudioDeviceAddIOProc returned %d\n", (int) status);
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return FALSE;
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}
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pthread_mutex_lock (&osxaudio->buffer_mutex);
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/* reset ring-buffer state */
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osxaudio->buf_read = 0;
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osxaudio->buf_write = 0;
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osxaudio->buf_read_pos = 0;
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osxaudio->buf_write_pos = 0;
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osxaudio->full_buffers = 0;
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osxaudio->buffered_bytes = 0;
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/* zero buffer */
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for (i = 0; i < NUM_BUFS; i++)
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bzero (osxaudio->buffer[i], osxaudio->buffer_len);
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pthread_mutex_unlock (&osxaudio->buffer_mutex);
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return TRUE;
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}
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static void
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gst_osxaudioelement_close_audio (GstOsxAudioElement * osxaudio, gboolean input)
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{
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OSErr status;
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int i;
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/* stop callback */
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if (input) {
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status = AudioDeviceStop (osxaudio->device_id, inputAudioDeviceIOProc);
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} else {
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status = AudioDeviceStop (osxaudio->device_id, outputAudioDeviceIOProc);
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}
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if (status)
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GST_DEBUG ("AudioDeviceStop returned %d\n", (int) status);
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if (input) {
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status =
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AudioDeviceRemoveIOProc (osxaudio->device_id, inputAudioDeviceIOProc);
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} else {
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status =
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AudioDeviceRemoveIOProc (osxaudio->device_id, outputAudioDeviceIOProc);
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}
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if (status)
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GST_DEBUG ("AudioDeviceRemoveIOProc " "returned %d\n", (int) status);
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for (i = 0; i < NUM_BUFS; i++)
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free (osxaudio->buffer[i]);
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}
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static void
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gst_osxaudioelement_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec)
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{
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GstOsxAudioElement *osxaudio = GST_OSXAUDIOELEMENT (object);
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OSStatus status;
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int nDevices;
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UInt32 propertySize;
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int deviceid;
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AudioDeviceID *devids;
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switch (prop_id) {
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case ARG_DEVICE:
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/* check index given is in bounds, if not use default device */
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status = AudioHardwareGetPropertyInfo (kAudioHardwarePropertyDevices,
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&propertySize, NULL);
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nDevices = propertySize / sizeof (AudioDeviceID);
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deviceid = g_value_get_int (value);
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if (deviceid < nDevices) {
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devids = malloc (propertySize);
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status =
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AudioHardwareGetProperty (kAudioHardwarePropertyDevices,
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&propertySize, devids);
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osxaudio->device_id = devids[deviceid];
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free (devids);
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} else {
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GST_DEBUG ("device index %d out of range. Max index is currently %d\n",
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deviceid, nDevices);
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}
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break;
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default:
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break;
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}
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}
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static void
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gst_osxaudioelement_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec)
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{
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GstOsxAudioElement *osxaudio = GST_OSXAUDIOELEMENT (object);
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OSStatus status;
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int nDevices;
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UInt32 propertySize;
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AudioDeviceID *devids;
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int i;
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switch (prop_id) {
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case ARG_DEVICE:
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/* figure out what index the current one is */
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status = AudioHardwareGetPropertyInfo (kAudioHardwarePropertyDevices,
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&propertySize, NULL);
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nDevices = propertySize / sizeof (AudioDeviceID);
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devids = malloc (propertySize);
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status =
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AudioHardwareGetProperty (kAudioHardwarePropertyDevices,
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&propertySize, devids);
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for (i = 0; i < nDevices; i++) {
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if (osxaudio->device_id == devids[i])
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break;
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}
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g_value_set_int (value, i);
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free (devids);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static GstStateChangeReturn
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gst_osxaudioelement_change_state (GstElement * element,
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GstStateChange transition)
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{
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GstOsxAudioElement *osxaudio = GST_OSXAUDIOELEMENT (element);
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const GList *padlist;
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gboolean input = TRUE;
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padlist = gst_element_get_pad_list (element);
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if (padlist != NULL) {
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GstPad *firstpad = padlist->data;
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if (GST_PAD_IS_SINK (firstpad)) {
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input = FALSE;
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}
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}
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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if (!gst_osxaudioelement_open_audio (osxaudio, input)) {
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return GST_STATE_CHANGE_FAILURE;
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}
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GST_INFO ("osxaudioelement: opened sound device");
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break;
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case GST_STATE_CHANGE_READY_TO_NULL:
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gst_osxaudioelement_close_audio (osxaudio, input);
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GST_INFO ("osxaudioelement: closed sound device");
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break;
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default:
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break;
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}
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if (GST_ELEMENT_CLASS (parent_class)->change_state)
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return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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return GST_STATE_CHANGE_SUCCESS;
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}
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