Show ao_jack.c syntax highlighted
/*
* ao_jack - JACK audio output driver for MPlayer
*
* Kamil Strzelecki < esack at browarek.net >
*
* This driver is distribuited under terms of GPL
*
* It uses bio2jack (http://bio2jack.sf.net/).
*
*/
#include <stdio.h>
#include <jack/jack.h>
#include "audio_out.h"
#include "audio_out_internal.h"
#include "afmt.h"
#include "config.h"
#include "mp_msg.h"
//#include "bio2jack.h"
static int driver = 0;
long latency = 0;
long approx_bytes_in_jackd = 0;
//bio2jack stuff:
#define ERR_SUCCESS 0
#define ERR_OPENING_JACK 1
#define ERR_RATE_MISMATCH 2
#define ERR_BYTES_PER_FRAME_INVALID 3
enum status_enum { PLAYING, PAUSED, STOPPED, CLOSED, RESET };
void JACK_Init(void);
int JACK_Open(int* deviceID, unsigned int bits_per_sample, unsigned long *rate, int channels);
int JACK_Close(int deviceID); /* return 0 for success */
void JACK_Reset(int deviceID); /* free all buffered data and reset several values in the device */
long JACK_Write(int deviceID, char *data, unsigned long bytes); /* returns the number of bytes written */
long JACK_GetJackLatency(int deviceID); /* return the latency in milliseconds of jack */
int JACK_SetState(int deviceID, enum status_enum state); /* playing, paused, stopped */
int JACK_SetAllVolume(int deviceID, unsigned int volume);
int JACK_SetVolumeForChannel(int deviceID, unsigned int channel, unsigned int volume);
void JACK_GetVolumeForChannel(int deviceID, unsigned int channel, unsigned int *volume);
//
static ao_info_t info =
{
"JACK audio output",
"jack",
"Kamil Strzelecki <esack@browarek.net>",
""
};
LIBAO_EXTERN(jack)
static int control(int cmd, void *arg)
{
switch(cmd) {
case AOCONTROL_GET_VOLUME:
{
ao_control_vol_t *vol = (ao_control_vol_t *)arg;
unsigned int l, r;
JACK_GetVolumeForChannel(driver, 0, &l);
JACK_GetVolumeForChannel(driver, 1, &r);
vol->left = (float )l;
vol->right = (float )r;
return CONTROL_OK;
}
case AOCONTROL_SET_VOLUME:
{
ao_control_vol_t *vol = (ao_control_vol_t *)arg;
unsigned int l = (int )vol->left,
r = (int )vol->right,
avg_vol = (l + r) / 2,
err = 0;
switch (ao_data.channels) {
case 6:
if((err = JACK_SetVolumeForChannel(driver, 5, avg_vol))) {
mp_msg(MSGT_AO, MSGL_ERR,
"AO: [Jack] Setting lfe volume failed, error %d\n",err);
return CONTROL_ERROR;
}
case 5:
if((err = JACK_SetVolumeForChannel(driver, 4, avg_vol))) {
mp_msg(MSGT_AO, MSGL_ERR,
"AO: [Jack] Setting center volume failed, error %d\n",err);
return CONTROL_ERROR;
}
case 4:
if((err = JACK_SetVolumeForChannel(driver, 3, r))) {
mp_msg(MSGT_AO, MSGL_ERR,
"AO: [Jack] Setting rear right volume failed, error %d\n",err);
return CONTROL_ERROR;
}
case 3:
if((err = JACK_SetVolumeForChannel(driver, 2, l))) {
mp_msg(MSGT_AO, MSGL_ERR,
"AO: [Jack] Setting rear left volume failed, error %d\n",err);
return CONTROL_ERROR;
}
case 2:
if((err = JACK_SetVolumeForChannel(driver, 1, r))) {
mp_msg(MSGT_AO, MSGL_ERR,
"AO: [Jack] Setting right volume failed, error %d\n",err);
return CONTROL_ERROR;
}
case 1:
if((err = JACK_SetVolumeForChannel(driver, 0, l))) {
mp_msg(MSGT_AO, MSGL_ERR,
"AO: [Jack] Setting left volume failed, error %d\n",err);
return CONTROL_ERROR;
}
}
return CONTROL_OK;
}
}
return(CONTROL_UNKNOWN);
}
static int init(int rate_hz, int channels, int format, int flags)
{
int err, m, frag_spec;
unsigned long rate;
unsigned int bits_per_sample;
unsigned long jack_port_flags=JackPortIsPhysical;
unsigned int jack_port_name_count=0;
const char *jack_port_name=NULL;
mp_msg(MSGT_AO, MSGL_INFO, "AO: [Jack] Initialising library.\n");
JACK_Init();
if (ao_subdevice) {
jack_port_flags = 0;
jack_port_name_count = 1;
jack_port_name = ao_subdevice;
mp_msg(MSGT_AO, MSGL_INFO, "AO: [Jack] Trying to use jack device:%s.\n", ao_subdevice);
}
switch (format) {
case AFMT_U8:
case AFMT_S8:
format = AFMT_U8;
bits_per_sample = 8;
m = 1;
break;
default:
format = AFMT_S16_LE;
bits_per_sample = 16;
m = 2;
break;
}
rate = rate_hz;
err = JACK_OpenEx(&driver, bits_per_sample, &rate, channels, channels,
&jack_port_name, jack_port_name_count, jack_port_flags);
/* if sample rates doesn't match try to open device with jack's rate and
* let mplayer convert it (rate now contains that which jackd use) */
if(err == ERR_RATE_MISMATCH) {
mp_msg(MSGT_AO, MSGL_INFO,
"AO: [Jack] Sample rate mismatch, trying to resample.\n");
err = JACK_OpenEx(&driver, bits_per_sample, &rate, channels, channels,
&jack_port_name, jack_port_name_count, jack_port_flags);
}
/* any other error */
if(err != ERR_SUCCESS) {
mp_msg(MSGT_AO, MSGL_ERR,
"AO: [Jack] JACK_Open() failed, error %d\n", err);
return 0;
}
err = JACK_SetAllVolume(driver, 100);
if(err != ERR_SUCCESS) {
// This is not fatal, but would be peculiar...
mp_msg(MSGT_AO, MSGL_ERR,
"AO: [Jack] JACK_SetAllVolume() failed, error %d\n", err);
}
latency = JACK_GetJackLatency(driver);
ao_data.format = format;
ao_data.channels = channels;
ao_data.samplerate = rate;
ao_data.bps = ( rate * channels * m );
// Rather rough way to find out the rough number of bytes buffered
approx_bytes_in_jackd = JACK_GetJackBufferedBytes(driver) * 2;
mp_msg(MSGT_AO, MSGL_INFO,
"AO: [Jack] OK. I'm ready to go (%d Hz/%d channels/%d bit)\n",
ao_data.samplerate, ao_data.channels, bits_per_sample);
return 1;
}
static void uninit(int immed)
{
int errval = 0;
if((errval = JACK_Close(driver)))
mp_msg(MSGT_AO, MSGL_ERR,
"AO: [Jack] error closing device, error %d\n", errval);
}
static int play(void* data,int len,int flags)
{
return JACK_Write(driver, data, len);
}
static void audio_pause()
{
JACK_SetState(driver, PAUSED);
}
static void audio_resume()
{
JACK_SetState(driver, PLAYING);
}
static void reset()
{
JACK_Reset(driver);
latency = JACK_GetJackLatency(driver);
// Rather rough way to find out the rough number of bytes buffered
approx_bytes_in_jackd = JACK_GetJackBufferedBytes(driver) * 2;
}
static int get_space()
{
return JACK_GetBytesFreeSpace(driver);
}
static float get_delay()
{
float ret = 0;
ret = (JACK_GetBytesStored(driver) + approx_bytes_in_jackd + latency) / (float)ao_data.bps;
return ret;
}
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