rdpsnd_alsa.c File Reference

#include <freerdp/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winpr/crt.h>
#include <winpr/cmdline.h>
#include <winpr/sysinfo.h>
#include <winpr/collections.h>
#include <alsa/asoundlib.h>
#include <freerdp/types.h>
#include <freerdp/codec/dsp.h>
#include <freerdp/channels/log.h>
#include "rdpsnd_main.h"

Macros
#define	SND_PCM_CHECK(_func, _status)

Functions
static int	rdpsnd_alsa_set_hw_params (rdpsndAlsaPlugin *alsa)
static int	rdpsnd_alsa_set_sw_params (rdpsndAlsaPlugin *alsa)
static int	rdpsnd_alsa_validate_params (rdpsndAlsaPlugin *alsa)
static int	rdpsnd_alsa_set_params (rdpsndAlsaPlugin *alsa)
static BOOL	rdpsnd_alsa_set_format (rdpsndDevicePlugin *device, const AUDIO_FORMAT *format, UINT32 latency)
static void	rdpsnd_alsa_close_mixer (rdpsndAlsaPlugin *alsa)
static BOOL	rdpsnd_alsa_open_mixer (rdpsndAlsaPlugin *alsa)
static void	rdpsnd_alsa_pcm_close (rdpsndAlsaPlugin *alsa)
static BOOL	rdpsnd_alsa_open (rdpsndDevicePlugin *device, const AUDIO_FORMAT *format, UINT32 latency)
static void	rdpsnd_alsa_close (rdpsndDevicePlugin *device)
static void	rdpsnd_alsa_free (rdpsndDevicePlugin *device)
static BOOL	rdpsnd_alsa_format_supported (rdpsndDevicePlugin *device, const AUDIO_FORMAT *format)
static UINT32	rdpsnd_alsa_get_volume (rdpsndDevicePlugin *device)
static BOOL	rdpsnd_alsa_set_volume (rdpsndDevicePlugin *device, UINT32 value)
static UINT	rdpsnd_alsa_play (rdpsndDevicePlugin *device, const BYTE *data, size_t size)
static UINT	rdpsnd_alsa_parse_addin_args (rdpsndDevicePlugin *device, const ADDIN_ARGV *args)
	FREERDP_ENTRY_POINT (UINT alsa_freerdp_rdpsnd_client_subsystem_entry(PFREERDP_RDPSND_DEVICE_ENTRY_POINTS pEntryPoints))

Macro Definition Documentation

SND_PCM_CHECK

#define SND_PCM_CHECK	(		_func,
			_status
	)

Value:

        do                                                     \
        {                                                      \
                if ((_status) < 0)                                 \
                {                                                  \
                        WLog_ERR(TAG, "%s: %d\n", (_func), (_status)); \
                        return -1;                                     \
                }                                                  \
        } while (0)

Function Documentation

FREERDP_ENTRY_POINT()

FREERDP_ENTRY_POINT

(

UINT

alsa_freerdp_rdpsnd_client_subsystem_entry PFREERDP_RDPSND_DEVICE_ENTRY_POINTS pEntryPoints

)

Function description

Returns

0 on success, otherwise a Win32 error code

Here is the call graph for this function:

rdpsnd_alsa_close()

static void rdpsnd_alsa_close ( rdpsndDevicePlugin *  device )

static

Here is the call graph for this function:

Here is the caller graph for this function:

rdpsnd_alsa_close_mixer()

static void rdpsnd_alsa_close_mixer ( rdpsndAlsaPlugin *  alsa )

static

Here is the caller graph for this function:

rdpsnd_alsa_format_supported()

static BOOL rdpsnd_alsa_format_supported ( rdpsndDevicePlugin *  device, const AUDIO_FORMAT *  format  )

static

Here is the caller graph for this function:

rdpsnd_alsa_free()

static void rdpsnd_alsa_free ( rdpsndDevicePlugin *  device )

static

Here is the call graph for this function:

Here is the caller graph for this function:

rdpsnd_alsa_get_volume()

static UINT32 rdpsnd_alsa_get_volume ( rdpsndDevicePlugin *  device )

static

Here is the call graph for this function:

Here is the caller graph for this function:

rdpsnd_alsa_open()

static BOOL rdpsnd_alsa_open ( rdpsndDevicePlugin *  device, const AUDIO_FORMAT *  format, UINT32  latency  )

static

Here is the call graph for this function:

Here is the caller graph for this function:

rdpsnd_alsa_open_mixer()

static BOOL rdpsnd_alsa_open_mixer ( rdpsndAlsaPlugin *  alsa )

static

Here is the call graph for this function:

Here is the caller graph for this function:

rdpsnd_alsa_parse_addin_args()

static UINT rdpsnd_alsa_parse_addin_args ( rdpsndDevicePlugin *  device, const ADDIN_ARGV *  args  )

static

Function description

Returns

0 on success, otherwise a Win32 error code

Here is the call graph for this function:

Here is the caller graph for this function:

rdpsnd_alsa_pcm_close()

static void rdpsnd_alsa_pcm_close ( rdpsndAlsaPlugin *  alsa )

static

Here is the caller graph for this function:

rdpsnd_alsa_play()

static UINT rdpsnd_alsa_play ( rdpsndDevicePlugin *  device, const BYTE *  data, size_t  size  )

static

Here is the call graph for this function:

Here is the caller graph for this function:

rdpsnd_alsa_set_format()

static BOOL rdpsnd_alsa_set_format ( rdpsndDevicePlugin *  device, const AUDIO_FORMAT *  format, UINT32  latency  )

static

Here is the call graph for this function:

Here is the caller graph for this function:

rdpsnd_alsa_set_hw_params()

static int rdpsnd_alsa_set_hw_params ( rdpsndAlsaPlugin *  alsa )

static

ALSA Parameters

http://www.alsa-project.org/main/index.php/FramesPeriods

buffer_size = period_size * periods period_bytes = period_size * bytes_per_frame bytes_per_frame = channels * bytes_per_sample

A frame is equivalent of one sample being played, irrespective of the number of channels or the number of bits

A period is the number of frames in between each hardware interrupt.

The buffer size always has to be greater than one period size. Commonly this is (2 * period_size), but some hardware can do 8 periods per buffer. It is also possible for the buffer size to not be an integer multiple of the period size.

Here is the caller graph for this function:

rdpsnd_alsa_set_params()

static int rdpsnd_alsa_set_params ( rdpsndAlsaPlugin *  alsa )

static

Here is the call graph for this function:

Here is the caller graph for this function:

rdpsnd_alsa_set_sw_params()

static int rdpsnd_alsa_set_sw_params ( rdpsndAlsaPlugin *  alsa )

static

Here is the caller graph for this function:

rdpsnd_alsa_set_volume()

static BOOL rdpsnd_alsa_set_volume ( rdpsndDevicePlugin *  device, UINT32  value  )

static

Here is the call graph for this function:

Here is the caller graph for this function:

rdpsnd_alsa_validate_params()

static int rdpsnd_alsa_validate_params ( rdpsndAlsaPlugin *  alsa )

static

Here is the caller graph for this function: