From: Andre Noll <maan@systemlinux.org>
Date: Wed, 13 Jan 2010 20:57:50 +0000 (+0100)
Subject: alsa: Kill non-btr code.
X-Git-Tag: v0.4.2~111
X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=commitdiff_plain;h=7041d795b5af3661daf332ef13c50517b5b9716b

alsa: Kill non-btr code.
---

diff --git a/alsa_write.c b/alsa_write.c
index 75fe6fae..7362c42b 100644
--- a/alsa_write.c
+++ b/alsa_write.c
@@ -39,7 +39,7 @@ struct private_alsa_write_data {
 	/** The alsa handle */
 	snd_pcm_t *handle;
 	/** Determined and set by alsa_open(). */
-	int bytes_per_frame; /* TODO: Kill this after btr switch */
+	int bytes_per_frame;
 	/** The approximate maximum buffer duration in us. */
 	unsigned buffer_time;
 	/* Number of frames that fit into the buffer. */
@@ -130,60 +130,27 @@ static int alsa_init(struct private_alsa_write_data *pad,
 }
 
 /* Open an instance of the alsa writer. */
-static int alsa_open_nobtr(struct writer_node *wn)
-{
-	struct alsa_write_args_info *conf = wn->conf;
-	struct writer_node_group *wng = wn->wng;
-	struct private_alsa_write_data *pad = para_calloc(sizeof(*pad));
-
-	wn->private_data = pad;
-	if (!conf->samplerate_given && wng->samplerate)
-		pad->samplerate = *wng->samplerate;
-	else
-		pad->samplerate = conf->samplerate_arg;
-	if (!conf->channels_given && wng->channels)
-		pad->channels = *wng->channels;
-	else
-		pad->channels = conf->channels_arg;
-	PARA_INFO_LOG("%d channel(s), %dHz\n", pad->channels, pad->samplerate);
-	return 1;
-}
-
-static int alsa_open_btr(struct writer_node *wn)
-{
-	struct private_alsa_write_data *pad = para_calloc(sizeof(*pad));
-
-	wn->private_data = pad;
-	return 1;
-}
 static int alsa_open(struct writer_node *wn)
 {
-	if (wn->btrn)
-		return alsa_open_btr(wn);
-	return alsa_open_nobtr(wn);
+	wn->private_data = para_calloc(sizeof(struct private_alsa_write_data));
+	return 1;
 }
 
-static int alsa_write_pre_select(struct sched *s, struct writer_node *wn)
+static void alsa_write_pre_select_btr(struct sched *s, struct task *t)
 {
+	struct writer_node *wn = container_of(t, struct writer_node, task);
 	struct private_alsa_write_data *pad = wn->private_data;
-	struct writer_node_group *wng = wn->wng;
 	struct timeval tv;
 	snd_pcm_sframes_t avail, underrun;
+	int ret;
 
 	if (!pad->handle)
-		return 1;
-	if (wn->btrn) {
-		int ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
-		if (ret == 0)
-			return 1;
-		if (ret < 0) {
-			sched_request_timeout_ms(20, s);
-			return 42;
-		}
-	} else {
-		if (*wng->loaded - wn->written < pad->bytes_per_frame)
-			return 1;
-	}
+		return;
+	ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
+	if (ret < 0)
+		sched_request_timeout_ms(20, s);
+	if (ret <= 0)
+		return;
 	/*
 	 * Data is available to be written to the alsa handle.  Compute number
 	 * of milliseconds until next buffer underrun would occur.
@@ -205,14 +172,6 @@ static int alsa_write_pre_select(struct sched *s, struct writer_node *wn)
 	ms2tv(underrun, &tv);
 	if (tv_diff(&s->timeout, &tv, NULL) > 0)
 		s->timeout = tv;
-	//PARA_CRIT_LOG("timout: %lu\n", tv2ms(&s->timeout));
-	return 1;
-}
-
-static void alsa_write_pre_select_btr(struct sched *s, struct task *t)
-{
-	struct writer_node *wn = container_of(t, struct writer_node, task);
-	alsa_write_pre_select(s, wn);
 }
 
 static void xrun(snd_pcm_t *handle)
@@ -232,49 +191,6 @@ static void xrun(snd_pcm_t *handle)
 	PARA_WARNING_LOG("underrun: %lums\n", tv2ms(&diff));
 }
 
-static int alsa_write_post_select(__a_unused struct sched *s,
-		struct writer_node *wn)
-{
-	struct private_alsa_write_data *pad = wn->private_data;
-	struct writer_node_group *wng = wn->wng;
-	size_t bytes = *wng->loaded - wn->written;
-	unsigned char *data = (unsigned char*)*wng->bufp + wn->written;
-	snd_pcm_sframes_t ret, frames, avail;
-
-	if (*wng->input_error < 0 && (!pad->handle || bytes < pad->bytes_per_frame)) {
-		wn->written = *wng->loaded;
-		return *wng->input_error;
-	}
-	if (!bytes) /* no data available */
-		return 0;
-	if (!pad->handle) {
-		int err = alsa_init(pad, wn->conf);
-		if (err < 0)
-			return err;
-	}
-	frames = bytes / pad->bytes_per_frame;
-	if (!frames) /* less than a single frame available */
-		return 0;
-	avail = snd_pcm_avail_update(pad->handle);
-	if (avail <= 0)
-		return 0;
-	frames = PARA_MIN(frames, avail);
-	ret = snd_pcm_writei(pad->handle, data, frames);
-	if (ret >= 0) {
-		wn->written += ret * pad->bytes_per_frame;
-		return 1;
-	}
-	if (ret == -EPIPE) {
-		xrun(pad->handle);
-		snd_pcm_prepare(pad->handle);
-		return 0;
-	}
-	PARA_WARNING_LOG("%s\n", snd_strerror(-ret));
-	if (ret == -EAGAIN)
-		return 0;
-	return -E_ALSA_WRITE;
-}
-
 static void alsa_close(struct writer_node *wn)
 {
 	struct private_alsa_write_data *pad = wn->private_data;
@@ -341,7 +257,6 @@ again:
 				pad->channels = ch;
 		}
 		PARA_INFO_LOG("%d channel(s), %dHz\n", pad->channels, pad->samplerate);
-		ret = 1;
 		ret = alsa_init(pad, wn->conf);
 		if (ret < 0)
 			goto err;
@@ -404,9 +319,7 @@ void alsa_write_init(struct writer *w)
 	alsa_cmdline_parser_init(&dummy);
 	w->open = alsa_open;
 	w->close = alsa_close;
-	w->pre_select = alsa_write_pre_select;
 	w->pre_select_btr = alsa_write_pre_select_btr;
-	w->post_select = alsa_write_post_select;
 	w->post_select_btr = alsa_write_post_select_btr;
 	w->parse_config = alsa_parse_config;
 	w->shutdown = NULL; /* nothing to do */