sandy
/
PL286
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1 Commit
1 Branch
0 Tags
18 GiB
Tree: 99da0f2c72
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from '99da0f2c72'
${ noResults }
PL286/hardware/qcom/audio/legacy/libalsa-intf/alsa_pcm.c

852 lines
24 KiB
Raw Blame History

/*
** Copyright 2010, The Android Open-Source Project
** Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved.
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#define LOG_TAG "alsa_pcm"
#define LOG_NDEBUG 1
#ifdef ANDROID
/* definitions for Android logging */
#include <utils/Log.h>
#include <cutils/properties.h>
#else /* ANDROID */
#define strlcat g_strlcat
#define strlcpy g_strlcpy
#define ALOGI(...) fprintf(stdout, __VA_ARGS__)
#define ALOGE(...) fprintf(stderr, __VA_ARGS__)
#define ALOGV(...) fprintf(stderr, __VA_ARGS__)
#endif /* ANDROID */
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <stdint.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <sys/poll.h>
#include <linux/ioctl.h>
#include <linux/types.h>
#include "alsa_audio.h"
#define DEBUG 1
enum format_alias {
S8 = 0,
U8,
S16_LE,
S16_BE,
U16_LE,
U16_BE,
S24_LE,
S24_BE,
U24_LE,
U24_BE,
S32_LE,
S32_BE,
U32_LE,
U32_BE,
FLOAT_LE,
FLOAT_BE,
FLOAT64_LE,
FLOAT64_BE,
IEC958_SUBFRAME_LE,
IEC958_SUBFRAME_BE,
MU_LAW,
A_LAW,
IMA_ADPCM,
MPEG,
GSM,
SPECIAL = 31,
S24_3LE,
S24_3BE,
U24_3LE,
U24_3BE,
S20_3LE,
S20_3BE,
U20_3LE,
U20_3BE,
S18_3LE,
S18_3BE,
U18_3LE,
U18_3BE,
FORMAT_LAST,
};
const char *formats_list[][2] = {
{"S8", "Signed 8 bit"},
{"U8", "Unsigned 8 bit"},
{"S16_LE", "Signed 16 bit Little Endian"},
{"S16_BE", "Signed 16 bit Big Endian"},
{"U16_LE", "Unsigned 16 bit Little Endian"},
{"U16_BE", "Unsigned 16 bit Big Endian"},
{"S24_LE", "Signed 24 bit Little Endian"},
{"S24_BE", "Signed 24 bit Big Endian"},
{"U24_LE", "Unsigned 24 bit Little Endian"},
{"U24_BE", "Unsigned 24 bit Big Endian"},
{"S32_LE", "Signed 32 bit Little Endian"},
{"S32_BE", "Signed 32 bit Big Endian"},
{"U32_LE", "Unsigned 32 bit Little Endian"},
{"U32_BE", "Unsigned 32 bit Big Endian"},
{"FLOAT_LE", "Float 32 bit Little Endian"},
{"FLOAT_BE", "Float 32 bit Big Endian"},
{"FLOAT64_LE", "Float 64 bit Little Endian"},
{"FLOAT64_BE", "Float 64 bit Big Endian"},
{"IEC958_SUBFRAME_LE", "IEC-958 Little Endian"},
{"IEC958_SUBFRAME_BE", "IEC-958 Big Endian"},
{"MU_LAW", "Mu-Law"},
{"A_LAW", "A-Law"},
{"IMA_ADPCM", "Ima-ADPCM"},
{"MPEG", "MPEG"},
{"GSM", "GSM"},
[31] = {"SPECIAL", "Special"},
{"S24_3LE", "Signed 24 bit Little Endian in 3bytes"},
{"S24_3BE", "Signed 24 bit Big Endian in 3bytes"},
{"U24_3LE", "Unsigned 24 bit Little Endian in 3bytes"},
{"U24_3BE", "Unsigned 24 bit Big Endian in 3bytes"},
{"S20_3LE", "Signed 20 bit Little Endian in 3bytes"},
{"S20_3BE", "Signed 20 bit Big Endian in 3bytes"},
{"U20_3LE", "Unsigned 20 bit Little Endian in 3bytes"},
{"U20_3BE", "Unsigned 20 bit Big Endian in 3bytes"},
{"S18_3LE", "Signed 18 bit Little Endian in 3bytes"},
{"S18_3BE", "Signed 18 bit Big Endian in 3bytes"},
{"U18_3LE", "Unsigned 18 bit Little Endian in 3bytes"},
{"U18_3BE", "Unsigned 18 bit Big Endian in 3bytes"},
};
int get_compressed_format(const char *format)
{
const char *ch = format;
if (strcmp(ch, "MP3") == 0) {
printf("MP3 is selected\n");
return FORMAT_MP3;
} else if (strcmp(ch, "AC3_PASS_THROUGH") == 0) {
printf("AC3 PASS THROUGH is selected\n");
return FORMAT_AC3_PASS_THROUGH;
} else {
printf("invalid format\n");
return -1;
}
return 0;
}
int get_format(const char* name)
{
int format;
for (format = 0; format < FORMAT_LAST; format++) {
if (formats_list[format][0] &&
strcasecmp(name, formats_list[format][0]) == 0) {
ALOGV("format_names %s", name);
return format;
}
}
return -EINVAL;
}
const char *get_format_name(int format)
{
if ((format < FORMAT_LAST) &&
formats_list[format][0])
return formats_list[format][0];
return NULL;
}
const char *get_format_desc(int format)
{
if ((format < FORMAT_LAST) &&
formats_list[format][1])
return formats_list[format][1];
return NULL;
}
/* alsa parameter manipulation cruft */
#define PARAM_MAX SNDRV_PCM_HW_PARAM_LAST_INTERVAL
static int oops(struct pcm *pcm, int e, const char *fmt, ...);
static inline int param_is_mask(int p)
{
return (p >= SNDRV_PCM_HW_PARAM_FIRST_MASK) &&
(p <= SNDRV_PCM_HW_PARAM_LAST_MASK);
}
static inline int param_is_interval(int p)
{
return (p >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL) &&
(p <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL);
}
static inline struct snd_interval *param_to_interval(struct snd_pcm_hw_params *p, int n)
{
return &(p->intervals[n - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]);
}
static inline struct snd_mask *param_to_mask(struct snd_pcm_hw_params *p, int n)
{
return &(p->masks[n - SNDRV_PCM_HW_PARAM_FIRST_MASK]);
}
void param_set_mask(struct snd_pcm_hw_params *p, int n, unsigned bit)
{
if (bit >= SNDRV_MASK_MAX)
return;
if (param_is_mask(n)) {
struct snd_mask *m = param_to_mask(p, n);
m->bits[0] = 0;
m->bits[1] = 0;
m->bits[bit >> 5] |= (1 << (bit & 31));
}
}
void param_set_min(struct snd_pcm_hw_params *p, int n, unsigned val)
{
if (param_is_interval(n)) {
struct snd_interval *i = param_to_interval(p, n);
i->min = val;
}
}
void param_set_max(struct snd_pcm_hw_params *p, int n, unsigned val)
{
if (param_is_interval(n)) {
struct snd_interval *i = param_to_interval(p, n);
i->max = val;
}
}
void param_set_int(struct snd_pcm_hw_params *p, int n, unsigned val)
{
if (param_is_interval(n)) {
struct snd_interval *i = param_to_interval(p, n);
i->min = val;
i->max = val;
i->integer = 1;
}
}
void param_init(struct snd_pcm_hw_params *p)
{
int n;
memset(p, 0, sizeof(*p));
for (n = SNDRV_PCM_HW_PARAM_FIRST_MASK;
n <= SNDRV_PCM_HW_PARAM_LAST_MASK; n++) {
struct snd_mask *m = param_to_mask(p, n);
m->bits[0] = ~0;
m->bits[1] = ~0;
}
for (n = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL;
n <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; n++) {
struct snd_interval *i = param_to_interval(p, n);
i->min = 0;
i->max = ~0;
}
}
/* debugging gunk */
#if DEBUG
static const char *param_name[PARAM_MAX+1] = {
[SNDRV_PCM_HW_PARAM_ACCESS] = "access",
[SNDRV_PCM_HW_PARAM_FORMAT] = "format",
[SNDRV_PCM_HW_PARAM_SUBFORMAT] = "subformat",
[SNDRV_PCM_HW_PARAM_SAMPLE_BITS] = "sample_bits",
[SNDRV_PCM_HW_PARAM_FRAME_BITS] = "frame_bits",
[SNDRV_PCM_HW_PARAM_CHANNELS] = "channels",
[SNDRV_PCM_HW_PARAM_RATE] = "rate",
[SNDRV_PCM_HW_PARAM_PERIOD_TIME] = "period_time",
[SNDRV_PCM_HW_PARAM_PERIOD_SIZE] = "period_size",
[SNDRV_PCM_HW_PARAM_PERIOD_BYTES] = "period_bytes",
[SNDRV_PCM_HW_PARAM_PERIODS] = "periods",
[SNDRV_PCM_HW_PARAM_BUFFER_TIME] = "buffer_time",
[SNDRV_PCM_HW_PARAM_BUFFER_SIZE] = "buffer_size",
[SNDRV_PCM_HW_PARAM_BUFFER_BYTES] = "buffer_bytes",
[SNDRV_PCM_HW_PARAM_TICK_TIME] = "tick_time",
};
void param_dump(struct snd_pcm_hw_params *p)
{
int n;
for (n = SNDRV_PCM_HW_PARAM_FIRST_MASK;
n <= SNDRV_PCM_HW_PARAM_LAST_MASK; n++) {
struct snd_mask *m = param_to_mask(p, n);
ALOGV("%s = %08x%08x\n", param_name[n],
m->bits[1], m->bits[0]);
}
for (n = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL;
n <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; n++) {
struct snd_interval *i = param_to_interval(p, n);
ALOGV("%s = (%d,%d) omin=%d omax=%d int=%d empty=%d\n",
param_name[n], i->min, i->max, i->openmin,
i->openmax, i->integer, i->empty);
}
ALOGV("info = %08x\n", p->info);
ALOGV("msbits = %d\n", p->msbits);
ALOGV("rate = %d/%d\n", p->rate_num, p->rate_den);
ALOGV("fifo = %d\n", (int) p->fifo_size);
}
static void info_dump(struct snd_pcm_info *info)
{
ALOGV("device = %d\n", info->device);
ALOGV("subdevice = %d\n", info->subdevice);
ALOGV("stream = %d\n", info->stream);
ALOGV("card = %d\n", info->card);
ALOGV("id = '%s'\n", info->id);
ALOGV("name = '%s'\n", info->name);
ALOGV("subname = '%s'\n", info->subname);
ALOGV("dev_class = %d\n", info->dev_class);
ALOGV("dev_subclass = %d\n", info->dev_subclass);
ALOGV("subdevices_count = %d\n", info->subdevices_count);
ALOGV("subdevices_avail = %d\n", info->subdevices_avail);
}
#else
void param_dump(struct snd_pcm_hw_params *p) {}
static void info_dump(struct snd_pcm_info *info) {}
#endif
int param_set_hw_refine(struct pcm *pcm, struct snd_pcm_hw_params *params)
{
if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_HW_REFINE, params)) {
ALOGE("SNDRV_PCM_IOCTL_HW_REFINE failed");
return -EPERM;
}
return 0;
}
int param_set_hw_params(struct pcm *pcm, struct snd_pcm_hw_params *params)
{
if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_HW_PARAMS, params)) {
return -EPERM;
}
pcm->hw_p = params;
return 0;
}
int param_set_sw_params(struct pcm *pcm, struct snd_pcm_sw_params *sparams)
{
if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_SW_PARAMS, sparams)) {
return -EPERM;
}
pcm->sw_p = sparams;
return 0;
}
int pcm_buffer_size(struct snd_pcm_hw_params *params)
{
struct snd_interval *i = param_to_interval(params, SNDRV_PCM_HW_PARAM_BUFFER_BYTES);
ALOGV("%s = (%d,%d) omin=%d omax=%d int=%d empty=%d\n",
param_name[SNDRV_PCM_HW_PARAM_BUFFER_BYTES],
i->min, i->max, i->openmin,
i->openmax, i->integer, i->empty);
return i->min;
}
int pcm_period_size(struct snd_pcm_hw_params *params)
{
struct snd_interval *i = param_to_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_BYTES);
ALOGV("%s = (%d,%d) omin=%d omax=%d int=%d empty=%d\n",
param_name[SNDRV_PCM_HW_PARAM_PERIOD_BYTES],
i->min, i->max, i->openmin,
i->openmax, i->integer, i->empty);
return i->min;
}
const char* pcm_error(struct pcm *pcm)
{
return pcm->error;
}
static int oops(struct pcm *pcm, int e, const char *fmt, ...)
{
va_list ap;
int sz;
va_start(ap, fmt);
vsnprintf(pcm->error, PCM_ERROR_MAX, fmt, ap);
va_end(ap);
sz = strnlen(pcm->error, PCM_ERROR_MAX);
if (errno)
snprintf(pcm->error + sz, PCM_ERROR_MAX - sz,
": %s", strerror(e));
return -1;
}
long pcm_avail(struct pcm *pcm)
{
struct snd_pcm_sync_ptr *sync_ptr = pcm->sync_ptr;
if (pcm->flags & DEBUG_ON) {
ALOGV("hw_ptr = %d buf_size = %d appl_ptr = %d\n",
sync_ptr->s.status.hw_ptr,
pcm->buffer_size,
sync_ptr->c.control.appl_ptr);
}
if (pcm->flags & PCM_IN) {
long avail = sync_ptr->s.status.hw_ptr - sync_ptr->c.control.appl_ptr;
if (avail < 0)
avail += pcm->sw_p->boundary;
return avail;
} else {
long avail = sync_ptr->s.status.hw_ptr - sync_ptr->c.control.appl_ptr + ((pcm->flags & PCM_MONO) ? pcm->buffer_size/2 : pcm->buffer_size/4);
if (avail < 0)
avail += pcm->sw_p->boundary;
else if ((unsigned long) avail >= pcm->sw_p->boundary)
avail -= pcm->sw_p->boundary;
return avail;
}
}
int sync_ptr(struct pcm *pcm)
{
int err;
err = ioctl(pcm->fd, SNDRV_PCM_IOCTL_SYNC_PTR, pcm->sync_ptr);
if (err < 0) {
err = errno;
ALOGE("SNDRV_PCM_IOCTL_SYNC_PTR failed %d \n", err);
return err;
}
return 0;
}
int mmap_buffer(struct pcm *pcm)
{
int err, i;
char *ptr;
unsigned size;
struct snd_pcm_channel_info ch;
int channels = (pcm->flags & PCM_MONO) ? 1 : 2;
size = pcm->buffer_size;
if (pcm->flags & DEBUG_ON)
ALOGV("size = %d\n", size);
pcm->addr = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED,
pcm->fd, 0);
if (pcm->addr)
return 0;
else
return -errno;
}
/*
* Destination offset would be mod of total data written
* (application pointer) and the buffer size of the driver.
* Hence destination address would be base address(pcm->addr) +
* destination offset.
*/
u_int8_t *dst_address(struct pcm *pcm)
{
unsigned long pcm_offset = 0;
struct snd_pcm_sync_ptr *sync_ptr = pcm->sync_ptr;
unsigned int appl_ptr = 0;
appl_ptr = (pcm->flags & PCM_MONO) ? sync_ptr->c.control.appl_ptr*2 : sync_ptr->c.control.appl_ptr*4;
pcm_offset = (appl_ptr % (unsigned long)pcm->buffer_size);
return pcm->addr + pcm_offset;
}
int mmap_transfer(struct pcm *pcm, void *data, unsigned offset,
long frames)
{
struct snd_pcm_sync_ptr *sync_ptr = pcm->sync_ptr;
unsigned size;
u_int8_t *dst_addr, *mmaped_addr;
u_int8_t *src_addr = data;
int channels = (pcm->flags & PCM_MONO) ? 1 : 2;
dst_addr = dst_address(pcm);
frames = frames * channels *2 ;
while (frames-- > 0) {
*(u_int8_t*)dst_addr = *(const u_int8_t*)src_addr;
src_addr++;
dst_addr++;
}
return 0;
}
int mmap_transfer_capture(struct pcm *pcm, void *data, unsigned offset,
long frames)
{
struct snd_pcm_sync_ptr *sync_ptr = pcm->sync_ptr;
unsigned long pcm_offset = 0;
unsigned size;
u_int8_t *dst_addr, *mmaped_addr;
u_int8_t *src_addr;
int channels = (pcm->flags & PCM_MONO) ? 1 : 2;
unsigned int tmp = (pcm->flags & PCM_MONO) ? sync_ptr->c.control.appl_ptr*2 : sync_ptr->c.control.appl_ptr*4;
pcm_offset = (tmp % (unsigned long)pcm->buffer_size);
dst_addr = data;
src_addr = pcm->addr + pcm_offset;
frames = frames * channels *2 ;
while (frames-- > 0) {
*(u_int8_t*)dst_addr = *(const u_int8_t*)src_addr;
src_addr++;
dst_addr++;
}
return 0;
}
int pcm_prepare(struct pcm *pcm)
{
if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_PREPARE)) {
ALOGE("cannot prepare channel: errno =%d\n", -errno);
return -errno;
}
pcm->running = 1;
return 0;
}
static int pcm_write_mmap(struct pcm *pcm, void *data, unsigned count)
{
long frames;
int err;
int bytes_written;
frames = (pcm->flags & PCM_MONO) ? (count / 2) : (count / 4);
pcm->sync_ptr->flags = SNDRV_PCM_SYNC_PTR_APPL | SNDRV_PCM_SYNC_PTR_AVAIL_MIN;
err = sync_ptr(pcm);
if (err == EPIPE) {
ALOGE("Failed in sync_ptr\n");
/* we failed to make our window -- try to restart */
pcm->underruns++;
pcm->running = 0;
pcm_prepare(pcm);
}
pcm->sync_ptr->c.control.appl_ptr += frames;
pcm->sync_ptr->flags = 0;
err = sync_ptr(pcm);
if (err == EPIPE) {
ALOGE("Failed in sync_ptr 2 \n");
/* we failed to make our window -- try to restart */
pcm->underruns++;
pcm->running = 0;
pcm_prepare(pcm);
}
bytes_written = pcm->sync_ptr->c.control.appl_ptr - pcm->sync_ptr->s.status.hw_ptr;
if ((bytes_written >= pcm->sw_p->start_threshold) && (!pcm->start)) {
if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_START)) {
err = -errno;
if (errno == EPIPE) {
ALOGE("Failed in SNDRV_PCM_IOCTL_START\n");
/* we failed to make our window -- try to restart */
pcm->underruns++;
pcm->running = 0;
pcm_prepare(pcm);
} else {
ALOGE("Error no %d \n", errno);
return -errno;
}
} else {
ALOGD(" start\n");
pcm->start = 1;
}
}
return 0;
}
static int pcm_write_nmmap(struct pcm *pcm, void *data, unsigned count)
{
struct snd_xferi x;
int channels = (pcm->flags & PCM_MONO) ? 1 : ((pcm->flags & PCM_5POINT1)? 6 : 2 );
if (pcm->flags & PCM_IN)
return -EINVAL;
x.buf = data;
x.frames = (count / (channels * 2)) ;
for (;;) {
if (!pcm->running) {
if (pcm_prepare(pcm))
return -errno;
}
if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_WRITEI_FRAMES, &x)) {
if (errno == EPIPE) {
/* we failed to make our window -- try to restart */
ALOGE("Underrun Error\n");
pcm->underruns++;
pcm->running = 0;
continue;
}
return -errno;
}
if (pcm->flags & DEBUG_ON)
ALOGV("Sent frame\n");
return 0;
}
}
int pcm_write(struct pcm *pcm, void *data, unsigned count)
{
if (pcm->flags & PCM_MMAP)
return pcm_write_mmap(pcm, data, count);
else
return pcm_write_nmmap(pcm, data, count);
}
int pcm_read(struct pcm *pcm, void *data, unsigned count)
{
struct snd_xferi x;
if (!(pcm->flags & PCM_IN))
return -EINVAL;
x.buf = data;
if (pcm->flags & PCM_MONO) {
x.frames = (count / 2);
} else if (pcm->flags & PCM_QUAD) {
x.frames = (count / 8);
} else if (pcm->flags & PCM_5POINT1) {
x.frames = (count / 12);
} else {
x.frames = (count / 4);
}
for (;;) {
if (!pcm->running) {
if (pcm_prepare(pcm))
return -errno;
if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_START)) {
ALOGE("Arec:SNDRV_PCM_IOCTL_START failed\n");
return -errno;
}
pcm->running = 1;
}
if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_READI_FRAMES, &x)) {
if (errno == EPIPE) {
/* we failed to make our window -- try to restart */
ALOGE("Arec:Overrun Error\n");
pcm->underruns++;
pcm->running = 0;
continue;
}
ALOGE("Arec: error%d\n", errno);
return -errno;
}
return 0;
}
}
static struct pcm bad_pcm = {
.fd = -1,
};
static int enable_timer(struct pcm *pcm) {
pcm->timer_fd = open("/dev/snd/timer", O_RDWR | O_NONBLOCK);
if (pcm->timer_fd < 0) {
close(pcm->fd);
ALOGE("cannot open timer device 'timer'");
return &bad_pcm;
}
int arg = 1;
struct snd_timer_params timer_param;
struct snd_timer_select sel;
if (ioctl(pcm->timer_fd, SNDRV_TIMER_IOCTL_TREAD, &arg) < 0) {
ALOGE("extended read is not supported (SNDRV_TIMER_IOCTL_TREAD)\n");
}
memset(&sel, 0, sizeof(sel));
sel.id.dev_class = SNDRV_TIMER_CLASS_PCM;
sel.id.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
sel.id.card = pcm->card_no;
sel.id.device = pcm->device_no;
if (pcm->flags & PCM_IN)
sel.id.subdevice = 1;
else
sel.id.subdevice = 0;
if (pcm->flags & DEBUG_ON) {
ALOGD("sel.id.dev_class= %d\n", sel.id.dev_class);
ALOGD("sel.id.dev_sclass = %d\n", sel.id.dev_sclass);
ALOGD("sel.id.card = %d\n", sel.id.card);
ALOGD("sel.id.device = %d\n", sel.id.device);
ALOGD("sel.id.subdevice = %d\n", sel.id.subdevice);
}
if (ioctl(pcm->timer_fd, SNDRV_TIMER_IOCTL_SELECT, &sel) < 0) {
ALOGE("SNDRV_TIMER_IOCTL_SELECT failed.\n");
close(pcm->timer_fd);
close(pcm->fd);
return &bad_pcm;
}
memset(&timer_param, 0, sizeof(struct snd_timer_params));
timer_param.flags |= SNDRV_TIMER_PSFLG_AUTO;
timer_param.ticks = 1;
timer_param.filter = (1<<SNDRV_TIMER_EVENT_MSUSPEND) | (1<<SNDRV_TIMER_EVENT_MRESUME) | (1<<SNDRV_TIMER_EVENT_TICK);
if (ioctl(pcm->timer_fd, SNDRV_TIMER_IOCTL_PARAMS, &timer_param)< 0) {
ALOGE("SNDRV_TIMER_IOCTL_PARAMS failed\n");
}
if (ioctl(pcm->timer_fd, SNDRV_TIMER_IOCTL_START) < 0) {
close(pcm->timer_fd);
ALOGE("SNDRV_TIMER_IOCTL_START failed\n");
}
return 0;
}
static int disable_timer(struct pcm *pcm) {
if (pcm == &bad_pcm)
return 0;
if (ioctl(pcm->timer_fd, SNDRV_TIMER_IOCTL_STOP) < 0)
ALOGE("SNDRV_TIMER_IOCTL_STOP failed\n");
return close(pcm->timer_fd);
}
int pcm_close(struct pcm *pcm)
{
if (pcm == &bad_pcm)
return 0;
if (pcm->flags & PCM_MMAP) {
disable_timer(pcm);
if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_DROP) < 0) {
ALOGE("Reset failed");
}
if (munmap(pcm->addr, pcm->buffer_size))
ALOGE("munmap failed");
if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_HW_FREE) < 0) {
ALOGE("HW_FREE failed");
}
}
if (pcm->fd >= 0)
close(pcm->fd);
pcm->running = 0;
pcm->buffer_size = 0;
pcm->fd = -1;
if (pcm->sw_p)
free(pcm->sw_p);
if (pcm->hw_p)
free(pcm->hw_p);
if (pcm->sync_ptr)
free(pcm->sync_ptr);
free(pcm);
return 0;
}
struct pcm *pcm_open(unsigned flags, char *device)
{
char dname[19];
struct pcm *pcm;
struct snd_pcm_info info;
struct snd_pcm_hw_params params;
struct snd_pcm_sw_params sparams;
unsigned period_sz;
unsigned period_cnt;
char *tmp;
if (flags & DEBUG_ON) {
ALOGV("pcm_open(0x%08x)",flags);
ALOGV("device %s\n",device);
}
pcm = calloc(1, sizeof(struct pcm));
if (!pcm)
return &bad_pcm;
tmp = device+4;
if ((strncmp(device, "hw:",3) != 0) || (strncmp(tmp, ",",1) != 0)){
ALOGE("Wrong device fromat\n");
free(pcm);
return -EINVAL;
}
if (flags & PCM_IN) {
strlcpy(dname, "/dev/snd/pcmC", sizeof(dname));
tmp = device+3;
strlcat(dname, tmp, (2+strlen(dname))) ;
pcm->card_no = atoi(tmp);
strlcat(dname, "D", (sizeof("D")+strlen(dname)));
tmp = device+5;
pcm->device_no = atoi(tmp);
/* should be safe to assume pcm dev ID never exceed 99 */
if (pcm->device_no > 9)
strlcat(dname, tmp, (3+strlen(dname)));
else
strlcat(dname, tmp, (2+strlen(dname)));
strlcat(dname, "c", (sizeof("c")+strlen(dname)));
} else {
strlcpy(dname, "/dev/snd/pcmC", sizeof(dname));
tmp = device+3;
strlcat(dname, tmp, (2+strlen(dname))) ;
pcm->card_no = atoi(tmp);
strlcat(dname, "D", (sizeof("D")+strlen(dname)));
tmp = device+5;
pcm->device_no = atoi(tmp);
/* should be safe to assume pcm dev ID never exceed 99 */
if (pcm->device_no > 9)
strlcat(dname, tmp, (3+strlen(dname)));
else
strlcat(dname, tmp, (2+strlen(dname)));
strlcat(dname, "p", (sizeof("p")+strlen(dname)));
}
if (pcm->flags & DEBUG_ON)
ALOGV("Device name %s\n", dname);
pcm->sync_ptr = calloc(1, sizeof(struct snd_pcm_sync_ptr));
if (!pcm->sync_ptr) {
free(pcm);
return &bad_pcm;
}
pcm->flags = flags;
pcm->fd = open(dname, O_RDWR|O_NONBLOCK);
if (pcm->fd < 0) {
free(pcm->sync_ptr);
free(pcm);
ALOGE("cannot open device '%s', errno %d", dname, errno);
return &bad_pcm;
}
if (fcntl(pcm->fd, F_SETFL, fcntl(pcm->fd, F_GETFL) &
~O_NONBLOCK) < 0) {
close(pcm->fd);
free(pcm->sync_ptr);
free(pcm);
ALOGE("failed to change the flag, errno %d", errno);
return &bad_pcm;
}
if (pcm->flags & PCM_MMAP)
enable_timer(pcm);
if (pcm->flags & DEBUG_ON)
ALOGV("pcm_open() %s\n", dname);
if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_INFO, &info)) {
ALOGE("cannot get info - %s", dname);
}
if (pcm->flags & DEBUG_ON)
info_dump(&info);
return pcm;
}
int pcm_ready(struct pcm *pcm)
{
return pcm->fd >= 0;
}