* based on the vplay program by Michael Beck.
*/
-#define BUFFER_SIZE 1000 * 1000
#define WAV_HEADER_LEN 44
#include <sys/time.h> /* gettimeofday */
#include "para.h"
+#include "fd.h"
#include "play.cmdline.h"
#include <alsa/asoundlib.h>
-
-enum { E_BROKEN_CONF, /* Broken configuration for this PCM */
- E_ACCESS_TYPE, /* Access type not available */
- E_SAMPLE_FORMAT, /* Sample format not available */
- E_CHANNEL_COUNT, /* Channels count not available */
- E_HW_PARAMS, /* Unable to install hw params */
- E_SW_PARAMS, /* Unable to install sw params */
- E_BAD_PERIOD, /* Can't use period equal to buffer size */
- E_GET_XFER, /* Unable to obtain xfer align */
- E_SET_XFER, /* snd_pcm_sw_params_set_xfer_align failed */
- E_MEM, /* not enough memory */
- E_READ, /* read error */
- E_WRITE, /* write error */
- E_PIPE, /* write to pipe with other side closed */
- E_PCM_OPEN, /* unable to open pcm */
- E_SND_PCM_INFO, /* pcm info error */
- E_GET_BUFFER_TIME, /* snd_pcm_hw_params_get_buffer_time_max failed */
- E_SET_BUFFER_TIME, /* snd_pcm_hw_params_set_buffer_time_near failed */
- E_SET_RATE, /* snd_pcm_hw_params_set_rate_near failed */
- E_START_THRESHOLD, /* snd_pcm_sw_params_set_start_threshold failed */
- E_STOP_THRESHOLD, /* snd_pcm_sw_params_set_stop_threshold failed */
- E_LOG, /* snd_output_stdio_attach failed */
- E_SYNTAX /* could not parse start_time option */
-};
+#include "string.h"
+#include "error.h"
#define FORMAT SND_PCM_FORMAT_S16_LE
-#define EXIT(EXP) \
-do { if (EXP) \
- fprintf (stderr, "error: " #EXP "\n"); exit(EXP);} \
-while (0)
-
static snd_pcm_t *handle;
-static unsigned char *audiobuf;
static snd_pcm_uframes_t chunk_size;
+static unsigned char *audiobuf;
static size_t bytes_per_frame;
static struct timeval *start_time;
static struct gengetopt_args_info conf;
-/*
- * read_wav_header - read WAV_HEADER_LEN bytes from stdin to audio buffer
+INIT_PLAY_ERRLISTS;
+
+void para_log(__a_unused int ll, const char* fmt,...)
+{
+ va_list argp;
+
+ va_start(argp, fmt);
+ vfprintf(stderr, fmt, argp);
+ va_end(argp);
+}
+
+/**
+ * read WAV_HEADER_LEN bytes from stdin to audio buffer
*
- * Exit on errors and on eof before WAV_HEADER_LEN could be read.
+ * \return -E_READ_HDR on errors and on eof before WAV_HEADER_LEN could be
+ * read. A positive return value indicates success.
*/
-static void read_wav_header(void)
+static int read_wav_header(void)
{
ssize_t ret, count = 0;
while (count < WAV_HEADER_LEN) {
ret = read(STDIN_FILENO, audiobuf + count, WAV_HEADER_LEN - count);
if (ret <= 0)
- EXIT(E_READ);
+ return -E_READ_HDR;
count += ret;
}
+ return 1;
}
/*
- * set_alsa_params - Prepare the PCM handle for writing
+ * open and prepare the PCM handle for writing
*
* Install PCM software and hardware configuration. Exit on errors.
*/
-static void set_alsa_params(void)
+static int alsa_init(void)
{
snd_pcm_hw_params_t *hwparams;
snd_pcm_sw_params_t *swparams;
stop_threshold;
unsigned buffer_time = 0;
int err;
+ snd_pcm_info_t *info;
+ snd_output_t *log;
+
+ snd_pcm_info_alloca(&info);
+ if (snd_output_stdio_attach(&log, stderr, 0) < 0)
+ return -E_ALSA_LOG;
+ err = snd_pcm_open(&handle, conf.device_arg,
+ SND_PCM_STREAM_PLAYBACK, 0);
+ if (err < 0)
+ return -E_PCM_OPEN;
+ if ((err = snd_pcm_info(handle, info)) < 0)
+ return -E_SND_PCM_INFO;
snd_pcm_hw_params_alloca(&hwparams);
snd_pcm_sw_params_alloca(&swparams);
if (snd_pcm_hw_params_any(handle, hwparams) < 0)
- EXIT(E_BROKEN_CONF);
+ return -E_BROKEN_CONF;
if (snd_pcm_hw_params_set_access(handle, hwparams,
SND_PCM_ACCESS_RW_INTERLEAVED) < 0)
- EXIT(E_ACCESS_TYPE);
+ return -E_ACCESS_TYPE;
if (snd_pcm_hw_params_set_format(handle, hwparams, FORMAT) < 0)
- EXIT(E_SAMPLE_FORMAT);
+ return -E_SAMPLE_FORMAT;
if (snd_pcm_hw_params_set_channels(handle, hwparams, conf.channels_arg) < 0)
- EXIT(E_CHANNEL_COUNT);
- if (snd_pcm_hw_params_set_rate_near(handle, hwparams, (unsigned int*) &conf.sample_rate_arg, 0) < 0)
- EXIT(E_SET_RATE);
+ return -E_CHANNEL_COUNT;
+ if (snd_pcm_hw_params_set_rate_near(handle, hwparams,
+ (unsigned int*) &conf.sample_rate_arg, 0) < 0)
+ return -E_SET_RATE;
err = snd_pcm_hw_params_get_buffer_time_max(hwparams, &buffer_time, 0);
if (err < 0 || !buffer_time)
- EXIT(E_GET_BUFFER_TIME);
- if (buffer_time > 500000)
- buffer_time = 500000;
+ return -E_GET_BUFFER_TIME;
+ PARA_DEBUG_LOG("buffer time: %d\n", buffer_time);
if (snd_pcm_hw_params_set_buffer_time_near(handle, hwparams,
&buffer_time, 0) < 0)
- EXIT(E_SET_BUFFER_TIME);
+ return -E_SET_BUFFER_TIME;
if (snd_pcm_hw_params(handle, hwparams) < 0)
- EXIT(E_HW_PARAMS);
+ return -E_HW_PARAMS;
snd_pcm_hw_params_get_period_size(hwparams, &chunk_size, 0);
snd_pcm_hw_params_get_buffer_size(hwparams, &buffer_size);
+ PARA_DEBUG_LOG("buffer size: %lu, period_size: %lu\n", buffer_size, chunk_size);
if (chunk_size == buffer_size)
- EXIT(E_BAD_PERIOD);
+ return -E_BAD_PERIOD;
snd_pcm_sw_params_current(handle, swparams);
err = snd_pcm_sw_params_get_xfer_align(swparams, &xfer_align);
if (err < 0 || !xfer_align)
- EXIT(E_GET_XFER);
- snd_pcm_sw_params_set_sleep_min(handle, swparams, 0);
+ return -E_GET_XFER;
+// snd_pcm_sw_params_set_sleep_min(handle, swparams, 0);
snd_pcm_sw_params_set_avail_min(handle, swparams, chunk_size);
/* round to closest transfer boundary */
start_threshold = (buffer_size / xfer_align) * xfer_align;
start_threshold = 1;
if (snd_pcm_sw_params_set_start_threshold(handle, swparams,
start_threshold) < 0)
- EXIT(E_START_THRESHOLD);
+ return -E_START_THRESHOLD;
stop_threshold = buffer_size;
if (snd_pcm_sw_params_set_stop_threshold(handle, swparams,
stop_threshold) < 0)
- EXIT(E_STOP_THRESHOLD);
+ return -E_STOP_THRESHOLD;
if (snd_pcm_sw_params_set_xfer_align(handle, swparams, xfer_align) < 0)
- EXIT(E_SET_XFER);
+ return -E_SET_XFER;
if (snd_pcm_sw_params(handle, swparams) < 0)
- EXIT(E_SW_PARAMS);
+ return -E_SW_PARAMS;
bytes_per_frame = snd_pcm_format_physical_width(FORMAT) * conf.channels_arg / 8;
+ return chunk_size * bytes_per_frame;
}
-/*
- * pcm_write - push out pcm frames
+/**
+ * push out pcm frames
* \param data pointer do data to be written
- * \param count number of frames
+ * \param nbytes number of bytes (not frames)
*
- * \return Number of bytes written. Exit on errors.
+ * \return Number of bytes written, -E_ALSA_WRITE on errors.
*/
-static snd_pcm_sframes_t pcm_write(u_char *data, size_t count)
+static int alsa_write(u_char *data, size_t nbytes)
{
+ size_t frames = nbytes / bytes_per_frame;
snd_pcm_sframes_t r, result = 0;
- while (count > 0) {
+ while (frames > 0) {
/* write interleaved frames */
- r = snd_pcm_writei(handle, data, count);
+ r = snd_pcm_writei(handle, data, frames);
if (r < 0)
- fprintf(stderr, "write error: %s\n", snd_strerror(r));
- if (r == -EAGAIN || (r >= 0 && r < count))
+ PARA_ERROR_LOG("write error: %s\n", snd_strerror(r));
+ if (r == -EAGAIN || (r >= 0 && r < frames))
snd_pcm_wait(handle, 1);
else if (r == -EPIPE)
snd_pcm_prepare(handle);
else if (r < 0)
- EXIT(E_WRITE);
+ return -E_ALSA_WRITE;
if (r > 0) {
result += r;
- count -= r;
+ frames -= r;
data += r * bytes_per_frame;
}
}
- return result;
+ return result * bytes_per_frame;
}
-/*
- * start_time_in_future - check if current time is later than start_time
+static void alsa_shutdown(void)
+{
+ snd_pcm_drain(handle);
+ snd_pcm_close(handle);
+ snd_config_update_free_global();
+}
+
+/**
+ * check if current time is later than start_time
* \param diff pointer to write remaining time to
*
* If start_time was not given, or current time is later than given
return tv_diff(start_time, &now, diff) > 0? 1 : 0;
}
-/*
- * do_initial_delay - sleep until time given at command line
+/**
+ * sleep until time given at command line
*
* This is called if the initial buffer is filled. It returns
* immediately if no start_time was given at the command line
*/
static void do_initial_delay(struct timeval *delay)
{
- fprintf(stderr, "sleeping %lums\n", tv2ms(delay));
do
- select(1, NULL, NULL, NULL, delay);
+ para_select(1, NULL, NULL, delay);
while (start_time_in_future(delay));
}
-/*
- * play_pcm - play raw pcm data
+/**
+ * play raw pcm data
* \param loaded number of bytes already loaded
*
* If start_time was given, prebuffer data until buffer is full or
* start_time is reached. In any case, do not start playing before
* start_time.
+ *
+ * \return positive on success, negative on errors.
*/
-static void play_pcm(size_t loaded)
+static int play_pcm(size_t loaded)
{
- size_t chunk_bytes, bufsize, written = 0;
- ssize_t ret;
+ size_t bufsize, written = 0, prebuf_size;
unsigned char *p;
- int dont_write;
struct timeval delay;
+ int chunk_bytes, ret = alsa_init();
- set_alsa_params();
- chunk_bytes = chunk_size * bytes_per_frame;
- bufsize = chunk_bytes * 1024;
- audiobuf = realloc(audiobuf, bufsize);
- if (!audiobuf)
- EXIT(E_MEM);
+ if (ret < 0)
+ goto out;
+ chunk_bytes = ret;
+ bufsize = (conf.bufsize_arg * 1024 / chunk_bytes) * chunk_bytes;
+ audiobuf = para_realloc(audiobuf, bufsize);
+ prebuf_size = conf.prebuffer_arg * bufsize / 100;
again:
- dont_write = 0;
- if (!written && start_time)
- dont_write = start_time_in_future(&delay);
- if (!dont_write) {
- p = audiobuf;
- while (loaded >= chunk_bytes) {
- ret = pcm_write(p, chunk_size) * bytes_per_frame;
- p += ret;
- written += ret;
- loaded -= ret;
- }
- if (loaded && p != audiobuf) {
- fprintf(stderr, "memcpy: %d\n", loaded);
- memcpy(audiobuf, p, loaded);
+ if (!written) {
+ if (loaded < prebuf_size)
+ goto read;
+ if (start_time && start_time_in_future(&delay)) {
+ do_initial_delay(&delay);
+ start_time = NULL;
}
}
- if (dont_write && loaded >= bufsize) {
- do_initial_delay(&delay);
- start_time = NULL;
- goto again;
+ p = audiobuf;
+ while (loaded >= chunk_bytes) {
+ ret = alsa_write(p, chunk_bytes);
+ if (ret < 0)
+ goto out;
+ p += ret;
+ written += ret;
+ loaded -= ret;
+ }
+ if (loaded && p != audiobuf)
+ memmove(audiobuf, p, loaded);
+read:
+ ret = read(STDIN_FILENO, audiobuf + loaded, bufsize - loaded);
+ if (ret < 0) {
+ ret = -E_READ_STDIN;
+ goto out;
}
- ret = read(STDIN_FILENO, audiobuf, bufsize - loaded);
- if (ret < 0)
- EXIT(E_READ);
if (ret) {
loaded += ret;
goto again;
}
- snd_pcm_drain(handle);
+ ret = 1;
+out:
+ alsa_shutdown();
+ return ret;
}
-/*
- * check_wave - test if audio buffer contains a valid wave header
+/**
+ * test if audio buffer contains a valid wave header
*
- * If not, return 0, otherwise, store number of channels and sample rate
+ * \return If not, return 0, otherwise, store number of channels and sample rate
* in struct conf and return WAV_HEADER_LEN.
*/
static size_t check_wave(void)
return WAV_HEADER_LEN;
conf.channels_arg = (unsigned) a[22];
conf.sample_rate_arg = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
-// fprintf(stderr, "channels: %d, rate: %d\n", conf.channels_arg,
-// conf.sample_rate_arg);
return 0;
}
int main(int argc, char *argv[])
{
- snd_pcm_info_t *info;
- snd_output_t *log;
struct timeval tv;
- int err;
+ int ret;
cmdline_parser(argc, argv, &conf);
if (conf.start_time_given) {
+ ret = -E_PLAY_SYNTAX;
if (sscanf(conf.start_time_arg, "%lu:%lu",
&tv.tv_sec, &tv.tv_usec) != 2)
- EXIT(E_SYNTAX);
+ goto out;
start_time = &tv;
}
-// fprintf(stderr, "argc=%d, argv[1]=%s\n",argc, argv[1]);
- snd_pcm_info_alloca(&info);
- if (snd_output_stdio_attach(&log, stderr, 0) < 0)
- EXIT(E_LOG);
- err = snd_pcm_open(&handle, conf.device_arg,
- SND_PCM_STREAM_PLAYBACK, 0);
- if (err < 0)
- EXIT(E_PCM_OPEN);
- if ((err = snd_pcm_info(handle, info)) < 0)
- EXIT(E_SND_PCM_INFO);
- audiobuf = malloc(WAV_HEADER_LEN);
- read_wav_header();
- play_pcm(check_wave());
- snd_pcm_close(handle);
+ audiobuf = para_malloc(WAV_HEADER_LEN);
+ ret = read_wav_header();
+ if (ret < 0)
+ goto out;
+ ret = play_pcm(check_wave());
+out:
free(audiobuf);
-// snd_output_close(log);
- snd_config_update_free_global();
- return EXIT_SUCCESS;
+ if (ret < 0)
+ PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
+ return ret;
}
projects / paraslash.git / blobdiff