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/*
* import_sunau.c
*
* Copyright (C) Jacob Meuser - September 2004
*
* This file is part of transcode, a video stream processing tool
*
* transcode is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* transcode is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Make; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#define MOD_NAME "import_sunau.so"
#define MOD_VERSION "v0.0.2 (2004-10-02)"
#define MOD_CODEC "(audio) pcm"
#include "transcode.h"
static int verbose_flag = TC_QUIET;
static int capability_flag = TC_CAP_PCM;
#define MOD_PRE sunau
#include "import_def.h"
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/audioio.h>
#include "libtc/optstr.h"
static int sunau_fd = -1;
int sunau_init(const char *, int, int, int);
int sunau_grab(size_t, char *);
int sunau_stop(void);
int sunau_init(const char *audio_device,
int sample_rate, int precision, int channels)
{
audio_info_t audio_if;
int encoding;
if(!strcmp(audio_device, "/dev/null") || !strcmp(audio_device, "/dev/zero"))
return(0);
if(precision != 8 && precision != 16) {
tc_log_warn(MOD_NAME,
"bits/sample must be 8 or 16");
return(1);
}
encoding = (precision == 8) ?
AUDIO_ENCODING_ULINEAR : AUDIO_ENCODING_SLINEAR_LE;
AUDIO_INITINFO(&audio_if);
audio_if.record.precision = precision;
audio_if.record.channels = channels;
audio_if.record.sample_rate = sample_rate;
audio_if.record.encoding = encoding;
audio_if.mode = AUMODE_RECORD;
if ((sunau_fd = open(audio_device, O_RDONLY)) < 0) {
tc_log_perror(MOD_NAME, MOD_NAME "open audio device");
return(1);
}
if (ioctl(sunau_fd, AUDIO_SETINFO, &audio_if) < 0) {
tc_log_perror(MOD_NAME, "AUDIO_SETINFO");
return(1);
}
if (ioctl(sunau_fd, AUDIO_GETINFO, &audio_if) < 0) {
tc_log_perror(MOD_NAME, "AUDIO_GETINFO");
return(1);
}
if (audio_if.record.precision != precision) {
tc_log_warn(MOD_NAME,
"unable to initialize sample size for %s; "
"tried %d, got %d",
audio_device, precision, audio_if.record.precision);
return(1);
}
if (audio_if.record.channels != channels) {
tc_log_warn(MOD_NAME,
"unable to initialize number of channels for %s; "
"tried %d, got %d",
audio_device, channels, audio_if.record.channels);
return(1);
}
if (audio_if.record.sample_rate != sample_rate) {
tc_log_warn(MOD_NAME,
"unable to initialize rate for %s; "
"tried %d, got %d\n",
audio_device, sample_rate, audio_if.record.sample_rate);
return(1);
}
if (audio_if.record.encoding != encoding) {
tc_log_warn(MOD_NAME,
"unable to initialize encoding for %s; "
"tried %d, got %d",
audio_device, encoding, audio_if.record.encoding);
return(1);
}
if (ioctl(sunau_fd, AUDIO_FLUSH) < 0) {
tc_log_perror(MOD_NAME, "AUDIO_FLUSH");
return(1);
}
return(0);
}
int sunau_grab(size_t size, char *buffer)
{
int left;
int offset;
int received;
for (left = size, offset = 0; left > 0;) {
received = read(sunau_fd, buffer + offset, left);
if (received == 0) {
tc_log_warn(MOD_NAME,
"audio grab: received == 0");
}
if (received < 0) {
if(errno == EINTR) {
received = 0;
} else {
tc_log_perror(MOD_NAME, MOD_NAME "audio grab");
return(1);
}
}
if (received > left) {
tc_log_warn(MOD_NAME,
"read returns more bytes than requested; "
"requested: %d, returned: %d",
left, received);
return(1);
}
offset += received;
left -= received;
}
return(0);
}
int sunau_stop(void)
{
close(sunau_fd);
sunau_fd = -1;
if (verbose_flag & TC_STATS) {
tc_log_warn(MOD_NAME,
"totals: (not implemented)");
}
return(0);
}
/* ------------------------------------------------------------
*
* open stream
*
* ------------------------------------------------------------*/
MOD_open
{
int ret = TC_IMPORT_OK;
switch (param->flag) {
case TC_VIDEO:
tc_log_warn(MOD_NAME,
"unsupported request (init video)\n");
ret = TC_IMPORT_ERROR;
break;
case TC_AUDIO:
if (verbose_flag & TC_DEBUG) {
tc_log_info(MOD_NAME,
"sunau audio grabbing\n");
}
if (sunau_init(vob->audio_in_file,
vob->a_rate, vob->a_bits, vob->a_chan)) {
ret = TC_IMPORT_ERROR;
}
break;
default:
tc_log_warn(MOD_NAME,
"unsupported request (init)");
ret = TC_IMPORT_ERROR;
break;
}
return(ret);
}
/* ------------------------------------------------------------
*
* decode stream
*
* ------------------------------------------------------------*/
MOD_decode
{
int ret = TC_IMPORT_OK;
switch (param->flag) {
case TC_VIDEO:
tc_log_warn(MOD_NAME,
"unsupported request (decode video)");
ret = TC_IMPORT_ERROR;
break;
case TC_AUDIO:
if (sunau_grab(param->size, param->buffer)) {
tc_log_warn(MOD_NAME,
"error in grabbing audio");
ret = TC_IMPORT_ERROR;
}
break;
default:
tc_log_warn(MOD_NAME,
"unsupported request (decode)");
ret = TC_IMPORT_ERROR;
break;
}
return(ret);
}
/* ------------------------------------------------------------
*
* close stream
*
* ------------------------------------------------------------*/
MOD_close
{
int ret = TC_IMPORT_OK;
switch (param->flag) {
case TC_VIDEO:
tc_log_warn(MOD_NAME,
"unsupported request (close video)");
ret = TC_IMPORT_ERROR;
break;
case TC_AUDIO:
sunau_stop();
break;
default:
tc_log_warn(MOD_NAME,
"unsupported request (close)");
ret = TC_IMPORT_ERROR;
break;
}
return(ret);
}
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