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arts: implemented audio capture support.

(completely untested! Not even compiled!!).
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icculus committed Aug 3, 2016
1 parent 38f4b68 commit a7dddacd9949bee58399499fc48d96b5e07c0435
Showing with 44 additions and 11 deletions.
  1. +44 −11 src/audio/arts/SDL_artsaudio.c
@@ -54,12 +54,16 @@ static void (*SDL_NAME(arts_free)) (void);
static arts_stream_t(*SDL_NAME(arts_play_stream)) (int rate, int bits,
int channels,
const char *name);
static arts_stream_t(*SDL_NAME(arts_record_stream)) (int rate, int bits,
int channels,
const char *name);
static int (*SDL_NAME(arts_stream_set)) (arts_stream_t s,
arts_parameter_t param, int value);
static int (*SDL_NAME(arts_stream_get)) (arts_stream_t s,
arts_parameter_t param);
static int (*SDL_NAME(arts_write)) (arts_stream_t s, const void *buffer,
int count);
static int (*SDL_NAME(arts_read)) (arts_stream_t s, void *buffer, int count);
static void (*SDL_NAME(arts_close_stream)) (arts_stream_t s);
static int (*SDL_NAME(arts_suspend))(void);
static int (*SDL_NAME(arts_suspended)) (void);
@@ -75,9 +79,11 @@ static struct
SDL_ARTS_SYM(arts_init),
SDL_ARTS_SYM(arts_free),
SDL_ARTS_SYM(arts_play_stream),
SDL_ARTS_SYM(arts_record_stream),
SDL_ARTS_SYM(arts_stream_set),
SDL_ARTS_SYM(arts_stream_get),
SDL_ARTS_SYM(arts_write),
SDL_ARTS_SYM(arts_read),
SDL_ARTS_SYM(arts_close_stream),
SDL_ARTS_SYM(arts_suspend),
SDL_ARTS_SYM(arts_suspended),
@@ -199,6 +205,27 @@ ARTS_GetDeviceBuf(_THIS)
return (this->hidden->mixbuf);
}

static int
ARTS_CaptureFromDevice(_THIS, void *buffer, int buflen)
{
return SDL_NAME(arts_read) (this->hidden->stream, buffer, buflen);
}

static void
ARTS_FlushCapture(_THIS)
{
arts_stream_t stream = this->hidden->stream;
int remain = SDL_NAME(arts_stream_get)(stream, ARTS_P_BUFFER_SPACE);
Uint8 buf[512];
while (space > 0) {
const int len = SDL_min(sizeof (buf), remain);
const int br = SDL_NAME(arts_read)(stream, buf, len);
if (br <= 0) {
return; /* oh well. */
}
space -= br;
}
}

static void
ARTS_CloseDevice(_THIS)
@@ -278,19 +305,20 @@ ARTS_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
SDL_NAME(arts_error_text) (rc));
}

if (!ARTS_Suspend()) {
ARTS_CloseDevice(this);
return SDL_SetError("ARTS can not open audio device");
if (iscapture) {
this->hidden->stream = SDL_NAME(arts_record_stream) (this->spec.freq,
bits,
this->spec.channels,
"SDL");
} else {
this->hidden->stream = SDL_NAME(arts_play_stream) (this->spec.freq,
bits,
this->spec.channels,
"SDL");
/* Play nothing so we have at least one write (server bug workaround). */
SDL_NAME(arts_write) (this->hidden->stream, "", 0);
}

this->hidden->stream = SDL_NAME(arts_play_stream) (this->spec.freq,
bits,
this->spec.channels,
"SDL");

/* Play nothing so we have at least one write (server bug workaround). */
SDL_NAME(arts_write) (this->hidden->stream, "", 0);

/* Calculate the final parameters for this audio specification */
SDL_CalculateAudioSpec(&this->spec);

@@ -369,7 +397,12 @@ ARTS_Init(SDL_AudioDriverImpl * impl)
impl->CloseDevice = ARTS_CloseDevice;
impl->WaitDone = ARTS_WaitDone;
impl->Deinitialize = ARTS_Deinitialize;
impl->CaptureFromDevice = ARTS_CaptureFromDevice;
impl->FlushCapture = ARTS_FlushCapture;

impl->OnlyHasDefaultOutputDevice = 1;
impl->OnlyHasDefaultInputDevice = 1;
impl->HasCaptureSupport = 1;

return 1; /* this audio target is available. */
}

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