1 files changed, 129 insertions, 0 deletions
diff --git a/usb/device/audio-speaker/AUDDSpeakerChannel.c b/usb/device/audio-speaker/AUDDSpeakerChannel.c
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+++ b/usb/device/audio-speaker/AUDDSpeakerChannel.c
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+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support 
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+/*
+    Title: AUDDSpeakerChannel implementation
+
+    About: Purpose
+        Implementation of the AUDDSpeakerChannel functions.
+*/
+
+//------------------------------------------------------------------------------
+//         Headers
+//------------------------------------------------------------------------------
+
+#include "AUDDSpeakerChannel.h"
+#include <utility/trace.h>
+
+//------------------------------------------------------------------------------
+//         Callbacks
+//------------------------------------------------------------------------------
+/*
+    Function: AUDDSpeakerChannel_MuteChanged
+        Callback triggered when the mute status of a channel changes. This is
+        a default implementation which does nothing and must be overriden.
+
+    Parameters:
+        channel - Pointer to a AUDDSpeakerChannel instance.
+        muted - New mute status.
+*/
+//__attribute__ ((weak)) void AUDDSpeakerChannel_MuteChanged(
+//    AUDDSpeakerChannel *channel,
+//    unsigned char muted)
+//{
+//    TRACE_DEBUG("MuteChanged(%d, %d) ", channel->number, muted);
+//}
+
+//------------------------------------------------------------------------------
+//         Exported functions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+/// Initializes the member variables of an AUDDSpeakerChannel object to the
+/// given values.
+/// \param channel Pointer to an AUDDSpeakerChannel instance.
+/// \param number Channel number in the audio function.
+/// \param muted Indicates if the channel is muted.
+//------------------------------------------------------------------------------
+void AUDDSpeakerChannel_Initialize(AUDDSpeakerChannel *channel,
+                                   unsigned char number,
+                                   unsigned char muted)
+{
+    channel->number = number;
+    channel->muted = muted;
+}
+
+//------------------------------------------------------------------------------
+/// Indicates the number of a channel.
+/// \param channel Pointer to an AUDDSpeakerChannel instance.
+/// \return Channel number.
+//------------------------------------------------------------------------------
+unsigned char AUDDSpeakerChannel_GetNumber(const AUDDSpeakerChannel *channel)
+{
+    return channel->number;
+}
+
+//------------------------------------------------------------------------------
+/// Mutes the given channel and triggers the MuteChanged callback if
+/// necessary.
+/// \param channel Pointer to an AUDDSpeakerChannelInstance.
+//------------------------------------------------------------------------------
+void AUDDSpeakerChannel_Mute(AUDDSpeakerChannel *channel)
+{
+    if (!channel->muted) {
+
+        channel->muted = 1;
+        AUDDSpeakerChannel_MuteChanged(channel, 1);
+    }
+}
+
+//------------------------------------------------------------------------------
+/// Unmutes the given channel and triggers the MuteChanged callback if
+/// necessary.
+/// \param channel Pointer to an AUDDSpeakerChannelInstance.
+//------------------------------------------------------------------------------
+void AUDDSpeakerChannel_Unmute(AUDDSpeakerChannel *channel)
+{
+    if (channel->muted) {
+
+        channel->muted = 0;
+        AUDDSpeakerChannel_MuteChanged(channel, 0);
+    }
+}
+
+//------------------------------------------------------------------------------
+/// Indicates if the given channel is currently muted or not.
+/// \param channel Pointer an AUDDSpeakerChannel instance.
+/// \return 1 if the channel is muted; otherwise 0.
+//------------------------------------------------------------------------------
+unsigned char AUDDSpeakerChannel_IsMuted(const AUDDSpeakerChannel *channel)
+{
+    return channel->muted;
+}
+