--- /dev/null
+/**
+ ******************************************************************************
+ * @file usbd_audio_out_if.c
+ * @author MCD Application Team
+ * @version V1.0.0
+ * @date 22-July-2011
+ * @brief This file provides the Audio Out (palyback) interface API.
+ ******************************************************************************
+ * @attention
+ *
+ * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
+ * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
+ * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
+ * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
+ * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
+ * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+ *
+ * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2>
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "usbd_audio_core.h"
+#include "usbd_audio_out_if.h"
+
+
+
+
+/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
+ * @{
+ */
+
+
+/** @defgroup usbd_audio_out_if
+ * @brief usbd out interface module
+ * @{
+ */
+
+/** @defgroup usbd_audio_out_if_Private_TypesDefinitions
+ * @{
+ */
+/**
+ * @}
+ */
+
+
+/** @defgroup usbd_audio_out_if_Private_Defines
+ * @{
+ */
+/**
+ * @}
+ */
+
+
+/** @defgroup usbd_audio_out_if_Private_Macros
+ * @{
+ */
+/**
+ * @}
+ */
+
+
+/** @defgroup usbd_audio_out_if_Private_FunctionPrototypes
+ * @{
+ */
+static uint8_t Init (uint32_t AudioFreq, uint32_t Volume, uint32_t options);
+static uint8_t DeInit (uint32_t options);
+static uint8_t AudioCmd (uint8_t* pbuf, uint32_t size, uint8_t cmd);
+static uint8_t VolumeCtl (uint8_t vol);
+static uint8_t MuteCtl (uint8_t cmd);
+static uint8_t PeriodicTC (uint8_t cmd);
+static uint8_t GetState (void);
+
+/**
+ * @}
+ */
+
+/** @defgroup usbd_audio_out_if_Private_Variables
+ * @{
+ */
+AUDIO_FOPS_TypeDef AUDIO_OUT_fops =
+{
+ Init,
+ DeInit,
+ AudioCmd,
+ VolumeCtl,
+ MuteCtl,
+ PeriodicTC,
+ GetState
+};
+
+static uint8_t AudioState = AUDIO_STATE_INACTIVE;
+
+/**
+ * @}
+ */
+
+/** @defgroup usbd_audio_out_if_Private_Functions
+ * @{
+ */
+
+/**
+ * @brief Init
+ * Initialize and configures all required resources for audio play function.
+ * @param AudioFreq: Statrtup audio frequency.
+ * @param Volume: Startup volume to be set.
+ * @param options: specific options passed to low layer function.
+ * @retval AUDIO_OK if all operations succeed, AUDIO_FAIL else.
+ */
+static uint8_t Init (uint32_t AudioFreq,
+ uint32_t Volume,
+ uint32_t options)
+{
+ static uint32_t Initialized = 0;
+
+ /* Check if the low layer has already been initialized */
+ if (Initialized == 0)
+ {
+ /* Call low layer function */
+ if (EVAL_AUDIO_Init(OUTPUT_DEVICE_AUTO, Volume, AudioFreq) != 0)
+ {
+ AudioState = AUDIO_STATE_ERROR;
+ return AUDIO_FAIL;
+ }
+
+ /* Set the Initialization flag to prevent reinitializing the interface again */
+ Initialized = 1;
+ }
+
+ /* Update the Audio state machine */
+ AudioState = AUDIO_STATE_ACTIVE;
+
+ return AUDIO_OK;
+}
+
+/**
+ * @brief DeInit
+ * Free all resources used by low layer and stops audio-play function.
+ * @param options: options passed to low layer function.
+ * @retval AUDIO_OK if all operations succeed, AUDIO_FAIL else.
+ */
+static uint8_t DeInit (uint32_t options)
+{
+ /* Update the Audio state machine */
+ AudioState = AUDIO_STATE_INACTIVE;
+
+ return AUDIO_OK;
+}
+
+/**
+ * @brief AudioCmd
+ * Play, Stop, Pause or Resume current file.
+ * @param pbuf: address from which file shoud be played.
+ * @param size: size of the current buffer/file.
+ * @param cmd: command to be executed, can be AUDIO_CMD_PLAY , AUDIO_CMD_PAUSE,
+ * AUDIO_CMD_RESUME or AUDIO_CMD_STOP.
+ * @retval AUDIO_OK if all operations succeed, AUDIO_FAIL else.
+ */
+static uint8_t AudioCmd(uint8_t* pbuf,
+ uint32_t size,
+ uint8_t cmd)
+{
+ /* Check the current state */
+ if ((AudioState == AUDIO_STATE_INACTIVE) || (AudioState == AUDIO_STATE_ERROR))
+ {
+ AudioState = AUDIO_STATE_ERROR;
+ return AUDIO_FAIL;
+ }
+
+ switch (cmd)
+ {
+ /* Process the PLAY command ----------------------------*/
+ case AUDIO_CMD_PLAY:
+ /* If current state is Active or Stopped */
+ if ((AudioState == AUDIO_STATE_ACTIVE) || \
+ (AudioState == AUDIO_STATE_STOPPED) || \
+ (AudioState == AUDIO_STATE_PLAYING))
+ {
+ Audio_MAL_Play((uint32_t)pbuf, (size/2));
+ AudioState = AUDIO_STATE_PLAYING;
+ return AUDIO_OK;
+ }
+ /* If current state is Paused */
+ else if (AudioState == AUDIO_STATE_PAUSED)
+ {
+ if (EVAL_AUDIO_PauseResume(AUDIO_RESUME, (uint32_t)pbuf, (size/2)) != 0)
+ {
+ AudioState = AUDIO_STATE_ERROR;
+ return AUDIO_FAIL;
+ }
+ else
+ {
+ AudioState = AUDIO_STATE_PLAYING;
+ return AUDIO_OK;
+ }
+ }
+ else /* Not allowed command */
+ {
+ return AUDIO_FAIL;
+ }
+
+ /* Process the STOP command ----------------------------*/
+ case AUDIO_CMD_STOP:
+ if (AudioState != AUDIO_STATE_PLAYING)
+ {
+ /* Unsupported command */
+ return AUDIO_FAIL;
+ }
+ else if (EVAL_AUDIO_Stop(CODEC_PDWN_SW) != 0)
+ {
+ AudioState = AUDIO_STATE_ERROR;
+ return AUDIO_FAIL;
+ }
+ else
+ {
+ AudioState = AUDIO_STATE_STOPPED;
+ return AUDIO_OK;
+ }
+
+ /* Process the PAUSE command ---------------------------*/
+ case AUDIO_CMD_PAUSE:
+ if (AudioState != AUDIO_STATE_PLAYING)
+ {
+ /* Unsupported command */
+ return AUDIO_FAIL;
+ }
+ else if (EVAL_AUDIO_PauseResume(AUDIO_PAUSE, (uint32_t)pbuf, (size/2)) != 0)
+ {
+ AudioState = AUDIO_STATE_ERROR;
+ return AUDIO_FAIL;
+ }
+ else
+ {
+ AudioState = AUDIO_STATE_PAUSED;
+ return AUDIO_OK;
+ }
+
+ /* Unsupported command ---------------------------------*/
+ default:
+ return AUDIO_FAIL;
+ }
+}
+
+/**
+ * @brief VolumeCtl
+ * Set the volume level in %
+ * @param vol: volume level to be set in % (from 0% to 100%)
+ * @retval AUDIO_OK if all operations succeed, AUDIO_FAIL else.
+ */
+static uint8_t VolumeCtl (uint8_t vol)
+{
+ /* Call low layer volume setting function */
+ if (EVAL_AUDIO_VolumeCtl(vol) != 0)
+ {
+ AudioState = AUDIO_STATE_ERROR;
+ return AUDIO_FAIL;
+ }
+
+ return AUDIO_OK;
+}
+
+/**
+ * @brief MuteCtl
+ * Mute or Unmute the audio current output
+ * @param cmd: can be 0 to unmute, or 1 to mute.
+ * @retval AUDIO_OK if all operations succeed, AUDIO_FAIL else.
+ */
+static uint8_t MuteCtl (uint8_t cmd)
+{
+ /* Call low layer mute setting function */
+ if (EVAL_AUDIO_Mute(cmd) != 0)
+ {
+ AudioState = AUDIO_STATE_ERROR;
+ return AUDIO_FAIL;
+ }
+
+ return AUDIO_OK;
+}
+
+/**
+ * @brief
+ *
+ * @param
+ * @param
+ * @retval AUDIO_OK if all operations succeed, AUDIO_FAIL else.
+ */
+static uint8_t PeriodicTC (uint8_t cmd)
+{
+
+
+ return AUDIO_OK;
+}
+
+
+/**
+ * @brief GetState
+ * Return the current state of the audio machine
+ * @param None
+ * @retval Current State.
+ */
+static uint8_t GetState (void)
+{
+ return AudioState;
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
projects / fw / stlink / blobdiff