/******************************************************************************
* @name process_play_button
*
* @brief process play button
*
* @return None
*
* @comment
*
*******************************************************************************/
static void process_play_button(void)
{
if(USB_DEVICE_INTERFACED == audio_stream.DEV_STATE)
{
play = 1 - play;
/* play */
if (TRUE == play)
{
printf("Playing ...\n");
_lwevent_set(&USB_Event, USB_EVENT_RECEIVED_DATA);
#if (defined BSP_TWRMCF51JE) || (defined BSP_TWRMCF51MM)||(defined BSP_MCF51JMEVB)
EnableCmtInterrupt();
#elif (defined BSP_TWRMCF51JF)
EnableFTM0Interrupt();
#else
_audio_timer_unmask_int(BSP_LAST_TIMER);
#endif
}
/* stop */
else
{
printf("\nPaused.\n");
#if (defined BSP_TWRMCF51JE) || (defined BSP_TWRMCF51MM)||(defined BSP_MCF51JMEVB)
DisableCmtInterrupt();
#elif (defined BSP_TWRMCF51JF)
DisableFTM0Interrupt();
#else
_audio_timer_mask_int(BSP_LAST_TIMER);
#endif
}
}
}
/******************************************************************************
* @name Shell_play
*
* @brief Servers the play command
*
* @param None
*
* @return None
*
******************************************************************************
* This function is used to play an audio wav file
*****************************************************************************/
int_32 Shell_play(int_32 argc, char_ptr argv[])
{
boolean print_usage, shorthelp = FALSE;
uint_8 bSamFreqType_index;
print_usage = Shell_check_help_request (argc, argv, &shorthelp);
if (!print_usage)
{
WAVE_FILE_HEADER header;
if (argc > 1)
{
/* stop the current file playing */
if(AUDIO_PLAYING == audio_state)
{
audio_state = AUDIO_IDLE;
_audio_timer_mask_int(AUDIO_TIMER);
}
/* check the device is connected */
if ((USB_DEVICE_INUSE != audio_stream.DEV_STATE)||(device_direction != USB_AUDIO_DEVICE_DIRECTION_IN))
{
printf(" Error: Audio Speaker is not connected\n");
return (SHELL_EXIT_ERROR);
}
if (FillWaveHeader(argv[1], &header) != 0)
{
printf(" Error: Unable to open file: %s\n", argv[1]);
return (SHELL_EXIT_ERROR);
}
if (strcmp(header.CHUNK_DESCRIPTOR.Format, "WAVE"))
{
printf(" Error: File is not WAVE file.\n");
return (SHELL_EXIT_ERROR);
}
if (strcmp(header.FMT_SUBCHUNK.Subchunk1ID, "fmt "))
{
printf(" Error: File does not contain format subchunk.\n");
}
if (BYTESWAP16(header.FMT_SUBCHUNK.AudioFormat) != 1)
{
printf(" Error: File is compressed (not PCM).\n");
return (SHELL_EXIT_ERROR);
}
if (strcmp(header.DATA_SUBCHUNK.Subchunk2ID, "data"))
{
printf(" Error: File does not contain data subchunk.\n");
return (SHELL_EXIT_ERROR);
}
file_ptr = fopen(argv[1], "r");
if (file_ptr == NULL)
{
printf(" Unable to open file: %s\n", argv[1]);
return (SHELL_EXIT_ERROR);
}
file_open_count ++;
printf("Audio file properties:\n");
printf(" - Sample rate : %d Hz\n", BYTESWAP32(header.FMT_SUBCHUNK.SampleRate));
printf(" - Sample size : %d bits\n", BYTESWAP16(header.FMT_SUBCHUNK.BitsPerSample));
printf(" - Number of channels : %d channels\n", BYTESWAP16(header.FMT_SUBCHUNK.NumChannels));
/* Compare the sample rate */
for (bSamFreqType_index =0; bSamFreqType_index < frm_type_desc->bSamFreqType; bSamFreqType_index++)
{
if (((frm_type_desc->tSamFreq[3*bSamFreqType_index + 2] << 16) |
(frm_type_desc->tSamFreq[3*bSamFreqType_index + 1] << 8) |
(frm_type_desc->tSamFreq[3*bSamFreqType_index] << 0)) == BYTESWAP32(header.FMT_SUBCHUNK.SampleRate))
{
packet_size = USB_Audio_Get_Packet_Size(frm_type_desc,bSamFreqType_index);
break;
}
}
if (bSamFreqType_index == frm_type_desc->bSamFreqType)
{
printf(" The audio device doesn't support that audio sample rate \n");
return (SHELL_EXIT_ERROR);
}
/* Compare the bits sample number */
if (frm_type_desc->bBitResolution != BYTESWAP16(header.FMT_SUBCHUNK.BitsPerSample))
{
printf(" The audio device doesn't support that audio bit sample number \n");
return (SHELL_EXIT_ERROR);
}
/* Compare the channel number */
if (frm_type_desc->bNrChannels != BYTESWAP16(header.FMT_SUBCHUNK.NumChannels))
{
printf(" The audio device doesn't support that audio channel number \n");
return (SHELL_EXIT_ERROR);
}
fseek(file_ptr, WAVE_HEADER_SIZE, IO_SEEK_SET);
audio_state = AUDIO_PLAYING;
printf(" Playing...\n");
_audio_timer_unmask_int(AUDIO_TIMER);
}
else
{
if (AUDIO_PLAYING == audio_state)
{
printf(" The file is playing...\n");
}
else if (AUDIO_PAUSE == audio_state)
{
audio_state = AUDIO_PLAYING;
_audio_timer_unmask_int(AUDIO_TIMER);
printf(" Playing...\n");
}
else if (AUDIO_IDLE == audio_state)
{
printf(" Not enough parameters.\n");
}
}
}
else
{
if (shorthelp)
{
printf("%s <filename>\n", argv[0]);
}
else
{
printf("Usage: %s <filename>\n", argv[0]);
printf(" filename = wav file to play\n");
}
}
return(SHELL_EXIT_SUCCESS);
}
