--- /dev/null
+/*
+ * Copyright (C) 2005-2012 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+
+/** \file check_wav.c Detect and delete a wav header. */
+
+#include <regex.h>
+
+#include "para.h"
+#include "string.h"
+#include "list.h"
+#include "sched.h"
+#include "buffer_tree.h"
+#include "error.h"
+#include "check_wav.h"
+
+/** Length of a standard wav header. */
+#define WAV_HEADER_LEN 44
+
+enum check_wav_state {
+ CWS_NEED_HEADER,
+ CWS_HAVE_HEADER,
+ CWS_NO_HEADER,
+};
+
+struct check_wav_task {
+ enum check_wav_state state;
+ struct task task;
+ struct btr_node *btrn;
+ size_t min_iqs;
+ /* Command line args. */
+ struct wav_params params;
+ /* Extracted from the wav header.*/
+ unsigned channels;
+ unsigned sample_format;
+ unsigned sample_rate;
+};
+
+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);
+ int ret;
+
+ ret = btr_node_status(cwt->btrn, cwt->min_iqs, BTR_NT_INTERNAL);
+ if (ret != 0)
+ sched_min_delay(s);
+}
+
+static int check_wav_exec(struct btr_node *btrn, const char *cmd, char **result)
+{
+ struct check_wav_task *cwt = btr_context(btrn);
+ int val, header_val, given, arg;
+
+ header_val = cwt->channels;
+ arg = cwt->params.channels_arg;
+ given = cwt->params.channels_given;
+ if (!strcmp(cmd, "channels"))
+ goto out;
+
+ header_val = cwt->sample_rate;
+ arg = cwt->params.sample_rate_arg;
+ given = cwt->params.sample_rate_given;
+ if (!strcmp(cmd, "sample_rate"))
+ goto out;
+
+ header_val = cwt->sample_format;
+ arg = cwt->params.sample_format_arg;
+ given = cwt->params.sample_format_given;
+ if (!strcmp(cmd, "sample_format"))
+ goto out;
+
+ return -ERRNO_TO_PARA_ERROR(ENOTSUP);
+out:
+ if (given)
+ val = arg;
+ else {
+ switch (cwt->state) {
+ case CWS_HAVE_HEADER:
+ val = header_val;
+ break;
+ case CWS_NO_HEADER:
+ /* Use default value */
+ val = arg;
+ break;
+ default:
+ return -E_BTR_NAVAIL;
+ }
+ }
+ *result = make_message("%d", val);
+ return 1;
+}
+
+static void check_wav_post_select(__a_unused struct sched *s, struct task *t)
+{
+ 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};
+
+ 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;
+ }
+ PARA_INFO_LOG("found wav header\n");
+ cwt->state = CWS_HAVE_HEADER;
+ sprintf(t->status, "check wav: have header");
+ /* Only set those values which have not already been set. */
+ 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;
+ }
+ /*
+ * 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:
+ t->error = ret;
+ if (ret < 0)
+ btr_remove_node(&cwt->btrn);
+}
+
+struct check_wav_task *check_wav_init(struct sched *s, struct btr_node *parent,
+ struct wav_params *params, struct btr_node **cwt_btrn)
+{
+ struct check_wav_task *cwt = para_calloc(sizeof(*cwt));
+
+ cwt->state = CWS_NEED_HEADER;
+ cwt->min_iqs = WAV_HEADER_LEN;
+ cwt->params = *params;
+ cwt->btrn = btr_new_node(&(struct btr_node_description)
+ EMBRACE(.name = "check_wav", .parent = parent,
+ .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;
+ if (cwt_btrn)
+ *cwt_btrn = cwt->btrn;
+ register_task(s, &cwt->task);
+ return cwt;
+}
+
+void check_wav_shutdown(struct check_wav_task *cwt)
+{
+ free(cwt);
+}
--- /dev/null
+struct check_wav_task;
+
+/**
+ * These come from the command line arguments.
+ *
+ * Different users of the check_wav API have different arg_info structs,
+ * so we need a universal variant for these.
+ */
+struct wav_params {
+ /** Number of channels, or the default value. */
+ int channels_arg;
+ /** Whether the channel count was given. */
+ int channels_given;
+ /** Same semantics as \a channels_count. */
+ int sample_rate_arg;
+ /** Whether the sample rate was given. */
+ int sample_rate_given;
+ /** Same semantics as \a sample_rate. */
+ int sample_format_arg;
+ /** Whether the sample format was given. */
+ int sample_format_given;
+};
+
+/**
+ * Copy the wav parameters.
+ *
+ * \param dst Usually a pointer to struct wav_params.
+ * \param src Usually a pointer to some args_info struct.
+ *
+ * This can not be implemented as a function since the type of the structure
+ * pointed to by \a src depends on the application.
+ */
+#define COPY_WAV_PARMS(dst, src) \
+ (dst)->channels_arg = (src)->channels_arg; \
+ (dst)->channels_given = (src)->channels_given; \
+ (dst)->sample_rate_arg = (src)->sample_rate_arg; \
+ (dst)->sample_rate_given = (src)->sample_rate_given; \
+ (dst)->sample_format_arg = (src)->sample_format_arg; \
+ (dst)->sample_format_given = (src)->sample_format_given;
+
+struct check_wav_task *check_wav_init(struct sched *s, struct btr_node *parent,
+ struct wav_params *params, struct btr_node **cwt_btrn);
+void check_wav_shutdown(struct check_wav_task *cwt);
dccp_recv recv_common write_common file_write audiod_command
client_common recv stdout filter stdin audioc write client
exec send_common ggo udp_recv color fec fecdec_filter
- prebuffer_filter bitstream imdct
+ prebuffer_filter bitstream imdct check_wav
wma_afh wma_common wmadec_filter buffer_tree crypt_common
gui gui_theme sideband"
write_cmdline_objs="add_cmdline(write file_write)"
write_errlist_objs="write write_common file_write time fd string sched stdin
- buffer_tree ggo"
+ buffer_tree ggo check_wav"
write_ldflags=""
writers=" file"
default_writer="FILE_WRITE"
#define FILE_WRITE_ERRORS
#define STDIN_ERRORS
#define WRITE_ERRORS
+#define CHECK_WAV_ERRORS
extern const char **para_errlist[];
#include "fd.h"
#include "error.h"
#include "version.h"
+#include "check_wav.h"
INIT_WRITE_ERRLISTS;
-enum check_wav_state {
- CWS_NEED_HEADER,
- CWS_HAVE_HEADER,
- CWS_NO_HEADER,
-};
-
-/* Information extracted from the wav header. */
-struct check_wav_task {
- int state;
- /** Number of channels. */
- unsigned channels;
- unsigned sample_format;
- /** Sample rate specified in wav header given by \a buf. */
- unsigned sample_rate;
- /** The task structure used by the scheduler. */
- struct task task;
- struct btr_node *btrn;
- size_t min_iqs;
-};
-
static struct write_args_info conf;
static struct stdin_task sit;
-/** Length of a standard wav header. */
-#define WAV_HEADER_LEN 44
-
-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);
- int ret;
-
- ret = btr_node_status(cwt->btrn, cwt->min_iqs, BTR_NT_INTERNAL);
- if (ret != 0)
- sched_min_delay(s);
-}
-
-#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 check_wav_task *cwt = btr_context(btrn);
-
- HANDLE_EXEC(sample_rate);
- HANDLE_EXEC(channels);
- HANDLE_EXEC(sample_format);
- return -ERRNO_TO_PARA_ERROR(ENOTSUP);
-}
-
-static void check_wav_post_select(__a_unused struct sched *s, struct task *t)
-{
- 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};
-
- 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;
- }
- 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;
- }
- /*
- * 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:
- t->error = ret;
- if (ret < 0)
- btr_remove_node(&cwt->btrn);
-}
-
static int loglevel;
INIT_STDERR_LOGGING(loglevel)
static int setup_and_schedule(void)
{
int i, ret;
- struct check_wav_task _cwt, *cwt = &_cwt;
+ struct check_wav_task *cwt;
+ struct btr_node *cwt_btrn;
struct writer_node *wns;
static struct sched s;
+ struct wav_params wp;
loglevel = get_loglevel_by_name(conf.loglevel_arg);
sit.btrn = btr_new_node(&(struct btr_node_description)
stdin_set_defaults(&sit);
register_task(&s, &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(&s, &cwt->task);
-
+ COPY_WAV_PARMS(&wp, &conf);
+ cwt = check_wav_init(&s, sit.btrn, &wp, &cwt_btrn);
if (!conf.writer_given) {
wns = para_calloc(sizeof(*wns));
- setup_writer_node(NULL, cwt->btrn, wns, &s);
+ setup_writer_node(NULL, cwt_btrn, wns, &s);
i = 1;
} else {
wns = para_calloc(conf.writer_given * sizeof(*wns));
for (i = 0; i < conf.writer_given; i++)
- setup_writer_node(conf.writer_arg[i], cwt->btrn,
+ setup_writer_node(conf.writer_arg[i], cwt_btrn,
wns + i, &s);
}
free(wn->conf);
}
free(wns);
- btr_remove_node(&cwt->btrn);
+ check_wav_shutdown(cwt);
return ret;
}
projects / paraslash.git / commitdiff