audioc: Switch to blocking file descriptors.

[paraslash.git] / alsa_write.c

diff --git a/alsa_write.c b/alsa_write.c
index 8e3688faad4719c39b5819fb738cac1578323eee..7a4b868d251f0ee780647f72457b1c3162549bf0 100644 (file)
--- a/alsa_write.c
+++ b/alsa_write.c
@@ -1,5 +1,5 @@
 /*
 /*

- * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2010 Andre Noll <maan@systemlinux.org>

  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */


@@ -39,7 +39,7 @@ struct private_alsa_write_data {
        /** The alsa handle */
        snd_pcm_t *handle;
        /** Determined and set by alsa_open(). */
        /** 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. */
        /** The approximate maximum buffer duration in us. */
        unsigned buffer_time;
        /* Number of frames that fit into the buffer. */


@@ -54,6 +54,7 @@ struct private_alsa_write_data {
         * decoder of the writer node group.
         */
        unsigned channels;
         * decoder of the writer node group.
         */
        unsigned channels;

+       struct timeval drain_barrier;

 };
 
 /* Install PCM software and hardware configuration. */
 };
 
 /* Install PCM software and hardware configuration. */


@@ -130,60 +131,27 @@ static int alsa_init(struct private_alsa_write_data *pad,
 }
 
 /* Open an instance of the alsa writer. */
 }
 
 /* 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)
 {
 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(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 private_alsa_write_data *pad = wn->private_data;

-       struct writer_node_group *wng = wn->wng;

        struct timeval tv;
        snd_pcm_sframes_t avail, underrun;
        struct timeval tv;
        snd_pcm_sframes_t avail, underrun;

+       int ret;

 
        if (!pad->handle)
 
        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) {
-                       underrun = 10;
-                       goto timeout;
-               }
-       } 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.
        /*
         * Data is available to be written to the alsa handle.  Compute number
         * of milliseconds until next buffer underrun would occur.


@@ -202,78 +170,9 @@ static int alsa_write_pre_select(struct sched *s, struct writer_node *wn)
        if (underrun < 50)
                underrun = 50;
        underrun -= 50;
        if (underrun < 50)
                underrun = 50;
        underrun -= 50;

-timeout:

        ms2tv(underrun, &tv);
        if (tv_diff(&s->timeout, &tv, NULL) > 0)
                s->timeout = tv;
        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)
-{
-       snd_pcm_status_t *status;
-       int ret;
-       struct timeval tv, diff;
-
-       snd_pcm_status_alloca(&status);
-       ret = snd_pcm_status(handle, status);
-       if (ret < 0)
-               return;
-       if (snd_pcm_status_get_state(status) != SND_PCM_STATE_XRUN)
-               return;
-       snd_pcm_status_get_trigger_tstamp(status, &tv);
-       tv_diff(now, &tv, &diff);
-       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)
 }
 
 static void alsa_close(struct writer_node *wn)


@@ -294,7 +193,7 @@ static void alsa_close(struct writer_node *wn)
        free(pad);
 }
 
        free(pad);
 }
 

-static void alsa_write_post_select_btr(__a_unused struct sched *s,
+static void alsa_write_post_select(__a_unused struct sched *s,

                struct task *t)
 {
        struct writer_node *wn = container_of(t, struct writer_node, task);
                struct task *t)
 {
        struct writer_node *wn = container_of(t, struct writer_node, task);


@@ -302,7 +201,7 @@ static void alsa_write_post_select_btr(__a_unused struct sched *s,
        struct btr_node *btrn = wn->btrn;
        char *data;
        size_t bytes;
        struct btr_node *btrn = wn->btrn;
        char *data;
        size_t bytes;

-       snd_pcm_sframes_t frames, avail;
+       snd_pcm_sframes_t frames;

        int ret;
 
 again:
        int ret;
 
 again:


@@ -318,10 +217,14 @@ again:
                if (!pad->handle)
                        goto err;
                /* wait until pending frames are played */
                if (!pad->handle)
                        goto err;
                /* wait until pending frames are played */

-               avail = snd_pcm_avail_update(pad->handle);
-               if (avail + 1000 > pad->buffer_frames)
+               if (pad->drain_barrier.tv_sec == 0) {
+                       PARA_DEBUG_LOG("waiting for device to drain\n");
+                       tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
+                               &pad->drain_barrier);
+                       return;
+               }
+               if (tv_diff(now, &pad->drain_barrier, NULL) > 0)

                        goto err;
                        goto err;

-               PARA_DEBUG_LOG("waiting for device to drain\n");

                return;
        }
        if (!pad->handle) {
                return;
        }
        if (!pad->handle) {


@@ -333,47 +236,38 @@ again:
                pad->channels = conf->channels_arg;
                if (!conf->samplerate_given) { /* config option trumps btr_exec */
                        int32_t rate;
                pad->channels = conf->channels_arg;
                if (!conf->samplerate_given) { /* config option trumps btr_exec */
                        int32_t rate;

-                       ret = get_btr_samplerate(btrn, &rate);
-                       if (ret < 0)
-                               goto err;
-                       pad->samplerate = rate;
+                       if (get_btr_samplerate(btrn, &rate) >= 0)
+                               pad->samplerate = rate;

                }
                if (!conf->channels_given) {
                        int32_t ch;
                }
                if (!conf->channels_given) {
                        int32_t ch;

-                       ret = get_btr_channels(btrn, &ch);
-                       if (ret < 0)
-                               goto err;
-                       pad->channels = ch;
+                       if (get_btr_channels(btrn, &ch) >= 0)
+                               pad->channels = ch;

                }
                PARA_INFO_LOG("%d channel(s), %dHz\n", pad->channels, pad->samplerate);
                }
                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;
                wn->min_iqs = pad->bytes_per_frame;
        }
        frames = bytes / pad->bytes_per_frame;
                ret = alsa_init(pad, wn->conf);
                if (ret < 0)
                        goto err;
                wn->min_iqs = pad->bytes_per_frame;
        }
        frames = bytes / pad->bytes_per_frame;

-       avail = snd_pcm_avail_update(pad->handle);
-       if (avail <= 0)
-               return;
-       frames = PARA_MIN(frames, avail);
-       //PARA_CRIT_LOG("writing %ld frames\n", frames);

        frames = snd_pcm_writei(pad->handle, data, frames);
        if (frames >= 0) {
                btr_consume(btrn, frames * pad->bytes_per_frame);
                goto again;
        }
        if (frames == -EPIPE) {
        frames = snd_pcm_writei(pad->handle, data, frames);
        if (frames >= 0) {
                btr_consume(btrn, frames * pad->bytes_per_frame);
                goto again;
        }
        if (frames == -EPIPE) {

-               xrun(pad->handle);
+               PARA_WARNING_LOG("underrun (tried to write %zu bytes)\n", bytes);

                snd_pcm_prepare(pad->handle);
                return;
        }
                snd_pcm_prepare(pad->handle);
                return;
        }

-       PARA_WARNING_LOG("%s\n", snd_strerror(-frames));

        if (frames == -EAGAIN)
                return;
        if (frames == -EAGAIN)
                return;

+       PARA_WARNING_LOG("%s\n", snd_strerror(-frames));

        ret = -E_ALSA_WRITE;
 err:
        assert(ret < 0);
        ret = -E_ALSA_WRITE;
 err:
        assert(ret < 0);

+       btr_remove_node(btrn);

        t->error = ret;
 }
 
        t->error = ret;
 }
 


@@ -404,7 +298,7 @@ static void alsa_free_config(void *conf)
  *
  * \param w Pointer to the writer to initialize.
  *
  *
  * \param w Pointer to the writer to initialize.
  *

- * \sa \ref struct writer.
+ * \sa struct \ref writer.

  */
 void alsa_write_init(struct writer *w)
 {
  */
 void alsa_write_init(struct writer *w)
 {


@@ -414,9 +308,7 @@ void alsa_write_init(struct writer *w)
        w->open = alsa_open;
        w->close = alsa_close;
        w->pre_select = alsa_write_pre_select;
        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 = 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 */
        w->free_config = alsa_free_config;
        w->parse_config = alsa_parse_config;
        w->shutdown = NULL; /* nothing to do */
        w->free_config = alsa_free_config;