/*
- * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
#include <regex.h>
#include <sys/types.h>
#include <dirent.h>
+#include <stdbool.h>
#include "para.h"
#include "string.h"
#include "sched.h"
#include "ggo.h"
#include "stdin.h"
+#include "buffer_tree.h"
#include "write.h"
#include "write_common.h"
#include "fd.h"
INIT_WRITE_ERRLISTS;
-/** Check if given buffer contains a valid wave header. */
+enum check_wav_state {
+ CWS_NEED_HEADER,
+ CWS_HAVE_HEADER,
+ CWS_NO_HEADER,
+};
+
+/* Information extracted from the wav header. */
struct check_wav_task {
- /** The buffer to check. */
- char *buf;
- /** Number of bytes loaded in \a buf. */
- size_t *loaded;
- /** Non-zero if an error occurred or end of file was reached. */
- int *input_error;
- /** Number of channels specified in wav header given by \a buf. */
+ int state;
+ /** Number of channels. */
unsigned channels;
+ unsigned sample_format;
/** Sample rate specified in wav header given by \a buf. */
- unsigned samplerate;
+ unsigned sample_rate;
/** The task structure used by the scheduler. */
struct task task;
-};
-
-/** Delay writing until given time. */
-struct initial_delay_task {
- /** The time the first data should be written out. */
- struct timeval start_time;
- /** The task structure for this task. */
- struct task task;
+ struct btr_node *btrn;
+ size_t min_iqs;
};
static struct write_args_info conf;
static struct stdin_task sit;
-static struct check_wav_task the_check_wav_task;
-static struct initial_delay_task the_initial_delay_task;
-
-static struct writer_node_group *wng;
-
/** Length of a standard wav header. */
#define WAV_HEADER_LEN 44
-/**
- * Test if audio buffer contains a valid wave header.
- *
- * \return If not, return -E_NO_WAV_HEADER, otherwise, return zero. If
- * there is less than WAV_HEADER_LEN bytes available, return one.
- */
-static void check_wav_pre_select(__a_unused struct sched *s, struct task *t)
+static void check_wav_pre_select(struct sched *s, struct task *t)
{
struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
- unsigned char *a;
int ret;
- if (*cwt->loaded < WAV_HEADER_LEN) {
- if (*cwt->input_error < 0)
- t->error = *cwt->input_error;
- return;
- }
- cwt->channels = 2;
- cwt->samplerate = 44100;
- a = (unsigned char*)cwt->buf;
- if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F') {
- PARA_NOTICE_LOG("wav header not found\n");
- t->error = -E_NO_WAV_HEADER;
- goto out;
- }
- cwt->channels = (unsigned) a[22];
- cwt->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
- *cwt->loaded -= WAV_HEADER_LEN;
- memmove(cwt->buf, cwt->buf + WAV_HEADER_LEN, *cwt->loaded);
- t->error = -E_WAV_HEADER_SUCCESS;
- PARA_INFO_LOG("channels: %d, sample rate: %d\n", cwt->channels, cwt->samplerate);
-out:
- wng->channels = &cwt->channels;
- wng->samplerate = &cwt->samplerate;
- ret = wng_open(wng);
- if (ret < 0)
- t->error = ret;
- s->timeout.tv_sec = 0;
- s->timeout.tv_usec = 1;
+ ret = btr_node_status(cwt->btrn, cwt->min_iqs, BTR_NT_INTERNAL);
+ if (ret != 0)
+ sched_min_delay(s);
}
-static void initial_delay_pre_select(struct sched *s, struct task *t)
+#define HANDLE_EXEC(_cmd) \
+ if (!strcmp(cmd, #_cmd)) { \
+ if (!conf._cmd ## _given && cwt->state == CWS_NEED_HEADER) \
+ return -E_BTR_NAVAIL; \
+ *result = make_message("%d", cwt->state == CWS_NO_HEADER || conf._cmd ## _given? \
+ conf._cmd ## _arg : cwt->_cmd); \
+ return 1; \
+ } \
+
+
+static int check_wav_exec(struct btr_node *btrn, const char *cmd, char **result)
{
- struct initial_delay_task *idt = container_of(t, struct initial_delay_task, task);
- struct timeval diff;
+ struct check_wav_task *cwt = btr_context(btrn);
- if (!idt->start_time.tv_sec && !idt->start_time.tv_usec) {
- t->error = -E_NO_DELAY;
- goto register_check_wav;
- }
- if (tv_diff(now, &idt->start_time, &diff) > 0) {
- t->error = -E_DELAY_TIMEOUT;
- goto register_check_wav;
- }
- if (tv_diff(&s->timeout , &diff, NULL) > 0)
- s->timeout = diff;
- return;
-register_check_wav:
- register_task(&the_check_wav_task.task);
- s->timeout.tv_sec = 0;
- s->timeout.tv_usec = 1;
+ HANDLE_EXEC(sample_rate);
+ HANDLE_EXEC(channels);
+ HANDLE_EXEC(sample_format);
+ return -ERRNO_TO_PARA_ERROR(ENOTSUP);
}
-static int loglevel;
-INIT_STDERR_LOGGING(loglevel)
-
-static struct writer_node_group *check_args(void)
+static void check_wav_post_select(__a_unused struct sched *s, struct task *t)
{
- int i, ret = -E_WRITE_SYNTAX;
- struct writer_node_group *g = NULL;
- struct initial_delay_task *idt = &the_initial_delay_task;
+ struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
+ struct btr_node *btrn = cwt->btrn;
+ unsigned char *a;
+ size_t sz;
+ int ret;
+ uint16_t bps; /* bits per sample */
+ const char *sample_formats[] = {SAMPLE_FORMATS};
- loglevel = get_loglevel_by_name(conf.loglevel_arg);
- if (conf.start_time_given) {
- long unsigned sec, usec;
- if (sscanf(conf.start_time_arg, "%lu:%lu",
- &sec, &usec) != 2)
- goto out;
- idt->start_time.tv_sec = sec;
- idt->start_time.tv_usec = usec;
- }
- if (!conf.writer_given) {
- g = setup_default_wng();
- ret = 1;
+ t->error = 0;
+ ret = btr_node_status(btrn, cwt->min_iqs, BTR_NT_INTERNAL);
+ if (ret <= 0)
+ goto out;
+ if (cwt->state != CWS_NEED_HEADER)
+ goto pushdown;
+ btr_merge(btrn, cwt->min_iqs);
+ sz = btr_next_buffer(btrn, (char **)&a);
+ if (sz < cwt->min_iqs) /* file size less than WAV_HEADER_SIZE */
+ goto pushdown;
+ cwt->min_iqs = 0;
+ /*
+ * The default byte ordering assumed for WAVE data files is
+ * little-endian. Files written using the big-endian byte ordering
+ * scheme have the identifier RIFX instead of RIFF.
+ */
+ if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' ||
+ (a[3] != 'F' && a[3] != 'X')) {
+ PARA_NOTICE_LOG("wav header not found\n");
+ cwt->state = CWS_NO_HEADER;
+ sprintf(t->status, "check wav: no header");
goto out;
}
- g = wng_new(conf.writer_given);
- ret = -E_WRITE_SYNTAX;
- for (i = 0; i < conf.writer_given; i++) {
- int writer_num;
- g->writer_nodes[i].conf = check_writer_arg(
- conf.writer_arg[i], &writer_num);
- if (!g->writer_nodes[i].conf)
- goto out;
- g->writer_nodes[i].writer_num = writer_num;
+ PARA_INFO_LOG("found wav header\n");
+ cwt->state = CWS_HAVE_HEADER;
+ sprintf(t->status, "check wav: have header");
+ cwt->channels = (unsigned) a[22];
+ cwt->sample_rate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
+ bps = a[34] + ((unsigned)a[35] << 8);
+ if (bps != 8 && bps != 16) {
+ PARA_WARNING_LOG("%u bps not supported, assuming 16\n", bps);
+ bps = 16;
}
- ret = 1;
+ /*
+ * 8-bit samples are stored as unsigned bytes, ranging from 0 to 255.
+ * 16-bit samples are stored as 2's-complement signed integers, ranging
+ * from -32768 to 32767.
+ */
+ if (bps == 8)
+ cwt->sample_format = SF_U8;
+ else
+ cwt->sample_format = (a[3] == 'F')? SF_S16_LE : SF_S16_BE;
+ PARA_NOTICE_LOG("%dHz, %s, %s\n", cwt->sample_rate,
+ cwt->channels == 1? "mono" : "stereo",
+ sample_formats[cwt->sample_format]);
+ btr_consume(btrn, WAV_HEADER_LEN);
+pushdown:
+ btr_pushdown(btrn);
out:
- if (ret > 0)
- return g;
- free(g);
- return NULL;
+ t->error = ret;
+ if (ret < 0)
+ btr_remove_node(btrn);
}
+static int loglevel;
+INIT_STDERR_LOGGING(loglevel)
+
__noreturn static void print_help_and_die(void)
{
int d = conf.detailed_help_given;
exit(0);
}
+static int main_btr(struct sched *s)
+{
+ int i, ret;
+ struct check_wav_task _cwt, *cwt = &_cwt;
+ struct writer_node *wns;
+
+ loglevel = get_loglevel_by_name(conf.loglevel_arg);
+ sit.btrn = btr_new_node(&(struct btr_node_description)
+ EMBRACE(.name = "stdin"));
+ stdin_set_defaults(&sit);
+ register_task(&sit.task);
+
+ cwt->state = CWS_NEED_HEADER;
+ cwt->min_iqs = WAV_HEADER_LEN;
+ cwt->btrn = btr_new_node(&(struct btr_node_description)
+ EMBRACE(.name = "check_wav", .parent = sit.btrn,
+ .handler = check_wav_exec, .context = cwt));
+ sprintf(cwt->task.status, "check_wav");
+ cwt->task.pre_select = check_wav_pre_select;
+ cwt->task.post_select = check_wav_post_select;
+ cwt->task.error = 0;
+ register_task(&cwt->task);
+
+ ret = -E_WRITE_SYNTAX;
+ if (!conf.writer_given) {
+ i = 0;
+ wns = para_calloc(sizeof(*wns));
+ ret = setup_writer_node(NULL, cwt->btrn, wns);
+ if (ret < 0)
+ goto out;
+ i = 1;
+ } else {
+ wns = para_calloc(conf.writer_given * sizeof(*wns));
+ for (i = 0; i < conf.writer_given; i++) {
+ ret = setup_writer_node(conf.writer_arg[i],
+ cwt->btrn, wns + i);
+ if (ret < 0)
+ goto out;
+ }
+ }
+
+ s->default_timeout.tv_sec = 10;
+ s->default_timeout.tv_usec = 50000;
+ ret = schedule(s);
+out:
+ for (i--; i >= 0; i--) {
+ struct writer_node *wn = wns + i;
+ struct writer *w = writers + wn->writer_num;
+
+ w->close(wn);
+ btr_free_node(wn->btrn);
+ free(wn->conf);
+ }
+ free(wns);
+ btr_free_node(cwt->btrn);
+ return ret;
+}
+
/**
* Para_write's main function.
*
* \param argc The usual argument counter.
* \param argv The usual argument vector.
*
- * It registers the stdin task, the check_wav_task, the task for initial delay
- * and all tasks for actually writing out the stream.
+ * It sets up and starts the tasks and the buffer tree nodes determined by
+ * command line options.
*
* \return \p EXIT_SUCCESS or EXIT_FAILURE
*/
{
int ret = -E_WRITE_SYNTAX;
static struct sched s;
- struct check_wav_task *cwt = &the_check_wav_task;
- struct initial_delay_task *idt = &the_initial_delay_task;
writer_init();
write_cmdline_parser(argc, argv, &conf);
if (conf.help_given || conf.detailed_help_given)
print_help_and_die();
- wng = check_args();
- if (!wng)
- goto out;
- stdin_set_defaults(&sit);
- ret = -ERRNO_TO_PARA_ERROR(EINVAL);
- if (conf.bufsize_arg < 0)
- goto out;
- if (conf.bufsize_arg >= INT_MAX / 1024)
- goto out;
- sit.bufsize = conf.bufsize_arg * 1024;
- sit.buf = para_malloc(sit.bufsize);
-
- wng->bufp = &sit.buf;
- wng->loaded = &sit.loaded;
- wng->input_error = &sit.task.error;
-
- register_task(&sit.task);
-
- cwt->buf = sit.buf;
- cwt->loaded = &sit.loaded;
- cwt->input_error = &sit.task.error;
- sprintf(cwt->task.status, "check wav");
- cwt->task.pre_select = check_wav_pre_select;
-
- idt->task.pre_select = initial_delay_pre_select;
- sprintf(idt->task.status, "initial_delay");
- register_task(&idt->task);
-
- s.default_timeout.tv_sec = 10;
- s.default_timeout.tv_usec = 0;
- ret = schedule(&s);
- wng_close(wng);
-out:
+ ret = main_btr(&s);
if (ret < 0) {
PARA_ERROR_LOG("%s\n", para_strerror(-ret));
exit(EXIT_FAILURE);
projects / paraslash.git / blobdiff