rdpsnd_sun.c File Reference

#include "rdesktop.h"
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/audioio.h>

Include dependency graph for rdpsnd_sun.c:

Go to the source code of this file.

Classes
struct	audio_packet

Macros
#define	MAX_QUEUE   10

Functions
BOOL	wave_out_open (void)
void	wave_out_close (void)
BOOL	wave_out_format_supported (WAVEFORMATEX *pwfx)
BOOL	wave_out_set_format (WAVEFORMATEX *pwfx)
void	wave_out_volume (uint16 left, uint16 right)
void	wave_out_write (STREAM s, uint16 tick, uint8 index)
void	wave_out_play (void)

Variables
int This	dsp_
BOOL This	dsp_bu = False
static BOOL	g_reopened
static BOOL	g_swapaudio
static short	g_samplewidth
static struct audio_packet	packet_queue [MAX_QUEUE]
static unsigned int	queue_hi
static unsigned int	queue_lo

Macro Definition Documentation

MAX_QUEUE

#define MAX_QUEUE   10

Definition at line 34 of file rdpsnd_sun.c.

Function Documentation

wave_out_close()

void wave_out_close

(

void

)

Definition at line 76 of file rdpsnd_sun.c.

{
    /* Ack all remaining packets */
    while (queue_lo != queue_hi)
    {
        rdpsnd_send_completion(packet_queue[queue_lo].tick, packet_queue[queue_lo].index);
        free(packet_queue[queue_lo].s.data);
        queue_lo = (queue_lo + 1) % MAX_QUEUE;
    }

#if defined I_FLUSH && defined FLUSHW
    /* Flush the audiobuffer */
    ioctl(This->dsp_, I_FLUSH, FLUSHW);
#endif
#if defined AUDIO_FLUSH
    ioctl(This->dsp_, AUDIO_FLUSH, NULL);
#endif
    close(This->dsp_);
}

wave_out_format_supported()

BOOL wave_out_format_supported

(

WAVEFORMATEX *

pwfx

)

Definition at line 97 of file rdpsnd_sun.c.

{
    if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
        return False;
    if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
        return False;
    if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
        return False;

    return True;
}

wave_out_open()

BOOL wave_out_open

(

void

)

Definition at line 51 of file rdpsnd_sun.c.

{
    char *dsp_dev = getenv("AUDIODEV");

    if (dsp_dev == NULL)
    {
        dsp_dev = xstrdup("/dev/audio");
    }

    if ((This->dsp_ = open(dsp_dev, O_WRONLY | O_NONBLOCK)) == -1)
    {
        perror(dsp_dev);
        return False;
    }

    /* Non-blocking so that user interface is responsive */
    fcntl(This->dsp_, F_SETFL, fcntl(This->dsp_, F_GETFL) | O_NONBLOCK);

    queue_lo = queue_hi = 0;
    g_reopened = True;

    return True;
}

wave_out_play()

void wave_out_play

(

void

)

Definition at line 222 of file rdpsnd_sun.c.

{
    struct audio_packet *packet;
    audio_info_t info;
    ssize_t len;
    unsigned int i;
    uint8 swap;
    STREAM out;
    static BOOL swapped = False;
    static BOOL sentcompletion = True;
    static uint32 samplecnt = 0;
    static uint32 numsamples;

    while (1)
    {
        if (g_reopened)
        {
            /* Device was just (re)openend */
            samplecnt = 0;
            swapped = False;
            sentcompletion = True;
            g_reopened = False;
        }

        if (queue_lo == queue_hi)
        {
            This->dsp_bu = 0;
            return;
        }

        packet = &packet_queue[queue_lo];
        out = &packet->s;

        /* Swap the current packet, but only once */
        if (g_swapaudio && !swapped)
        {
            for (i = 0; i < out->end - out->p; i += 2)
            {
                swap = *(out->p + i);
                *(out->p + i) = *(out->p + i + 1);
                *(out->p + i + 1) = swap;
            }
            swapped = True;
        }

        if (sentcompletion)
        {
            sentcompletion = False;
            numsamples = (out->end - out->p) / g_samplewidth;
        }

        len = 0;

        if (out->end != out->p)
        {
            len = write(This->dsp_, out->p, out->end - out->p);
            if (len == -1)
            {
                if (errno != EWOULDBLOCK)
                    perror("write audio");
                This->dsp_bu = 1;
                return;
            }
        }

        out->p += len;
        if (out->p == out->end)
        {
            if (ioctl(This->dsp_, AUDIO_GETINFO, &info) == -1)
            {
                perror("AUDIO_GETINFO");
                return;
            }

            /* Ack the packet, if we have played at least 70% */
            if (info.play.samples >= samplecnt + ((numsamples * 7) / 10))
            {
                samplecnt += numsamples;
                rdpsnd_send_completion(packet->tick, packet->index);
                free(out->data);
                queue_lo = (queue_lo + 1) % MAX_QUEUE;
                swapped = False;
                sentcompletion = True;
            }
            else
            {
                This->dsp_bu = 1;
                return;
            }
        }
    }
}

Referenced by wave_out_write().

wave_out_set_format()

BOOL wave_out_set_format

(

WAVEFORMATEX *

pwfx

)

Definition at line 110 of file rdpsnd_sun.c.

{
    audio_info_t info;

    ioctl(This->dsp_, AUDIO_DRAIN, 0);
    g_swapaudio = False;
    AUDIO_INITINFO(&info);


    if (pwfx->wBitsPerSample == 8)
    {
        info.play.encoding = AUDIO_ENCODING_LINEAR8;
    }
    else if (pwfx->wBitsPerSample == 16)
    {
        info.play.encoding = AUDIO_ENCODING_LINEAR;
        /* Do we need to swap the 16bit values? (Are we BigEndian) */
#ifdef B_ENDIAN
        g_swapaudio = 1;
#else
        g_swapaudio = 0;
#endif
    }

    g_samplewidth = pwfx->wBitsPerSample / 8;

    if (pwfx->nChannels == 1)
    {
        info.play.channels = 1;
    }
    else if (pwfx->nChannels == 2)
    {
        info.play.channels = 2;
        g_samplewidth *= 2;
    }

    info.play.sample_rate = pwfx->nSamplesPerSec;
    info.play.precision = pwfx->wBitsPerSample;
    info.play.samples = 0;
    info.play.eof = 0;
    info.play.error = 0;
    g_reopened = True;

    if (ioctl(This->dsp_, AUDIO_SETINFO, &info) == -1)
    {
        perror("AUDIO_SETINFO");
        close(This->dsp_);
        return False;
    }

    return True;
}

wave_out_volume()

void wave_out_volume	(	uint16	left,
		uint16	right
	)

Definition at line 164 of file rdpsnd_sun.c.

{
    audio_info_t info;
    uint balance;
    uint volume;

    AUDIO_INITINFO(&info);

    volume = (left > right) ? left : right;

    if (volume / AUDIO_MID_BALANCE != 0)
    {
        balance =
            AUDIO_MID_BALANCE - (left / (volume / AUDIO_MID_BALANCE)) +
            (right / (volume / AUDIO_MID_BALANCE));
    }
    else
    {
        balance = AUDIO_MID_BALANCE;
    }

    info.play.gain = volume / (65536 / AUDIO_MAX_GAIN);
    info.play.balance = balance;

    if (ioctl(This->dsp_, AUDIO_SETINFO, &info) == -1)
    {
        perror("AUDIO_SETINFO");
        return;
    }
}

wave_out_write()

void wave_out_write	(	STREAM	s,
		uint16	tick,
		uint8	index
	)

Definition at line 196 of file rdpsnd_sun.c.

{
    struct audio_packet *packet = &packet_queue[queue_hi];
    unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;

    if (next_hi == queue_lo)
    {
        error("No space to queue audio packet\n");
        return;
    }

    queue_hi = next_hi;

    packet->s = *s;
    packet->tick = tick;
    packet->index = index;
    packet->s.p += 4;

    /* we steal the data buffer from s, give it a new one */
    s->data = malloc(s->size);

    if (!This->dsp_bu)
        wave_out_play();
}

Variable Documentation

dsp_

int This dsp_

Definition at line 36 of file rdpsnd_sun.c.

dsp_bu

BOOL This dsp_bu = False

Definition at line 37 of file rdpsnd_sun.c.

g_reopened

BOOL g_reopened

static

Definition at line 38 of file rdpsnd_sun.c.

Referenced by wave_out_open(), wave_out_play(), and wave_out_set_format().

g_samplewidth

short g_samplewidth

static

Definition at line 40 of file rdpsnd_sun.c.

Referenced by wave_out_play(), and wave_out_set_format().

g_swapaudio

BOOL g_swapaudio

static

Definition at line 39 of file rdpsnd_sun.c.

Referenced by wave_out_play(), and wave_out_set_format().

packet_queue

struct audio_packet packet_queue[MAX_QUEUE]

static

Referenced by wave_out_close(), wave_out_play(), and wave_out_write().

queue_hi

unsigned int queue_hi

static

Definition at line 48 of file rdpsnd_sun.c.

Referenced by wave_out_close(), wave_out_open(), wave_out_play(), and wave_out_write().

queue_lo

unsigned int queue_lo

static

Definition at line 48 of file rdpsnd_sun.c.

Referenced by wave_out_close(), wave_out_open(), wave_out_play(), and wave_out_write().