Add btr support to the oggdec filter.
[paraslash.git] / write.c
diff --git a/write.c b/write.c
index 21a0dad..def3133 100644 (file)
--- a/write.c
+++ b/write.c
 #include "sched.h"
 #include "ggo.h"
 #include "stdin.h"
+#include "buffer_tree.h"
 #include "write.h"
 #include "write_common.h"
 #include "fd.h"
 #include "error.h"
-#include "buffer_tree.h"
 
 INIT_WRITE_ERRLISTS;
 
@@ -42,6 +42,23 @@ struct check_wav_task {
        struct task task;
 };
 
+enum check_wav_state {
+       CWS_NEED_HEADER,
+       CWS_HAVE_HEADER,
+       CWS_NO_HEADER,
+};
+
+struct check_wav_task_btr {
+       int state;
+       /** Number of channels specified in wav header given by \a buf. */
+       unsigned channels;
+       /** Sample rate specified in wav header given by \a buf. */
+       unsigned samplerate;
+       /** The task structure used by the scheduler. */
+       struct task task;
+       struct btr_node *btrn;
+};
+
 /** Delay writing until given time. */
 struct initial_delay_task {
        /** The time the first data should be written out. */
@@ -103,6 +120,85 @@ out:
        s->timeout.tv_usec = 1;
 }
 
+static void check_wav_pre_select_btr(__a_unused struct sched *s, struct task *t)
+{
+       struct check_wav_task_btr *cwt = container_of(t, struct check_wav_task_btr, task);
+
+       if (btr_get_input_queue_size(cwt->btrn) < WAV_HEADER_LEN)
+               return;
+       s->timeout.tv_sec = 0;
+       s->timeout.tv_usec = 1;
+}
+
+static int check_wav_exec(struct btr_node *btrn, const char *cmd, char **result)
+{
+       struct check_wav_task_btr *cwt = btr_context(btrn);
+
+       if (!strcmp(cmd, "samplerate")) {
+               if (cwt->state != CWS_HAVE_HEADER)
+                       return -ERRNO_TO_PARA_ERROR(ENAVAIL);
+               *result = make_message("%d", cwt->samplerate);
+               return 1;
+       }
+       if (!strcmp(cmd, "channels")) {
+               if (cwt->state != CWS_HAVE_HEADER)
+                       return -ERRNO_TO_PARA_ERROR(ENAVAIL);
+               *result = make_message("%d", cwt->samplerate);
+               return 1;
+       }
+       return -ERRNO_TO_PARA_ERROR(ENOTSUP);
+}
+
+static void check_wav_post_select_btr(__a_unused struct sched *s, struct task *t)
+{
+       struct check_wav_task_btr *cwt = container_of(t, struct check_wav_task_btr, task);
+       unsigned char *a;
+       size_t sz = btr_get_input_queue_size(cwt->btrn);
+
+       t->error = 0;
+       if (cwt->state != CWS_NEED_HEADER)
+               goto out;
+       if (sz < WAV_HEADER_LEN) {
+               if (!btr_no_parent(cwt->btrn))
+                       return;
+               if (sz != 0) {
+                       cwt->state = CWS_NO_HEADER;
+                       goto out;
+               }
+               t->error = -E_WRITE_EOF;
+               goto err;
+       }
+       cwt->channels = 2;
+       cwt->samplerate = 44100;
+       btr_next_buffer(cwt->btrn, (char **)&a);
+       if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F') {
+               PARA_NOTICE_LOG("wav header not found\n");
+               cwt->state = CWS_NO_HEADER;
+               sprintf(t->status, "check wav: no header");
+               goto consume;
+       }
+       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->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
+consume:
+       PARA_INFO_LOG("channels: %d, sample rate: %d\n", cwt->channels, cwt->samplerate);
+       btr_consume(cwt->btrn, WAV_HEADER_LEN);
+out:
+       if (sz) {
+               btr_pushdown(cwt->btrn);
+               s->timeout.tv_sec = 0;
+               s->timeout.tv_usec = 1;
+       } else {
+               if (btr_no_parent(cwt->btrn))
+                       t->error = -E_WRITE_EOF;
+       }
+err:
+       if (t->error < 0)
+               btr_del_node(cwt->btrn);
+}
+
 static void initial_delay_pre_select(struct sched *s, struct task *t)
 {
        struct initial_delay_task *idt = container_of(t, struct initial_delay_task, task);
@@ -186,28 +282,56 @@ __noreturn static void print_help_and_die(void)
  */
 static int main_btr(struct sched *s)
 {
-       struct writer_node *wn = para_malloc(sizeof(*wn));
-       struct writer *w = writers + DEFAULT_WRITER;
-       int ret;
+       int i, ret;
+       struct check_wav_task_btr _cwt, *cwt = &_cwt;
+       struct writer_node **wns;
 
-       wn->writer_num = DEFAULT_WRITER;
-       wn->conf = writers[DEFAULT_WRITER].parse_config("-B");
-       sit.btrn = btr_new_node("stdin", NULL /* stdin has no parent */, NULL);
+       sit.btrn = btr_new_node("stdin", NULL /* stdin has no parent */, NULL, NULL);
        stdin_set_defaults(&sit);
        register_task(&sit.task);
 
-       wn->btrn = btr_new_node("writer", sit.btrn, NULL);
+       cwt->state = CWS_NEED_HEADER;
+       cwt->btrn = btr_new_node("check wav", sit.btrn, check_wav_exec, cwt);
+       sprintf(cwt->task.status, "check wav");
+       cwt->task.pre_select = check_wav_pre_select_btr;
+       cwt->task.post_select = check_wav_post_select_btr;
+       cwt->task.error = 0;
+       register_task(&cwt->task);
+
+       wns = para_malloc(conf.writer_given * sizeof(*wns));
 
-       sprintf(wn->task.status, "some writer");
-       w->open(wn);
-       wn->task.post_select = w->post_select_btr;
-       wn->task.pre_select = w->pre_select_btr;
-       register_task(&wn->task);
+       for (i = 0; i < conf.writer_given; i++) {
+               struct writer_node *wn = para_calloc(sizeof(*wn));
+               struct writer *w;
+               const char *name;
+
+               ret = -E_WRITE_SYNTAX;
+               wn->conf = check_writer_arg(conf.writer_arg[i],
+                       &wn->writer_num);
+               if (!wn->conf)
+                       goto out;
+               w = writers + wn->writer_num;
+               name = writer_names[wn->writer_num];
+               wn->btrn = btr_new_node(name, cwt->btrn, w->execute, wn);
+               sprintf(wn->task.status, "%s", name);
+               w->open(wn);
+               wn->task.post_select = w->post_select_btr;
+               wn->task.pre_select = w->pre_select_btr;
+               register_task(&wn->task);
+               wns[i] = wn;
+       }
+       i--;
 
        s->default_timeout.tv_sec = 10;
        s->default_timeout.tv_usec = 50000;
        ret = schedule(s);
-       w->close(wn);
+out:
+       for (; i >= 0; i--) {
+               struct writer_node *wn = wns[i];
+               free(wn->conf);
+               free(wn);
+       }
+       free(wns);
        return ret;
 }