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synced 2024-12-22 16:26:39 +00:00
get rid of bytestreams
Original commit message from CVS: get rid of bytestreams
This commit is contained in:
Benjamin Otte
parent
7b30d7b9a4
commit
b5a22d8630
2 changed files with 67 additions and 61 deletions
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@ -109,7 +109,7 @@ static void gst_alsa_sink_loop (GstElement *element);
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static void gst_alsa_src_loop (GstElement *element);
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static void gst_alsa_xrun_recovery (GstAlsa *this);
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static gboolean gst_alsa_sink_check_event (GstAlsa *this, gint pad_nr);
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static gboolean gst_alsa_sink_check_event (GstAlsa *this, gint pad_nr, GstEvent *event);
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/* alsa setup / start / stop functions */
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static gboolean gst_alsa_probe_hw_params (GstAlsa *this, GstAlsaFormat *format);
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@ -270,10 +270,10 @@ gst_alsa_class_init (GstAlsaClass *klass)
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2, 64, 2, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PERIODSIZE,
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g_param_spec_int ("period-size", "Period size", "Number of frames (samples on each channel) in one hardware period",
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64, 8192, 8192, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
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2, 8192, 8192, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BUFFERSIZE,
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g_param_spec_int ("buffer-size", "Buffer size", "Number of frames the hardware buffer can hold",
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128, 65536, 16384, G_PARAM_READWRITE));
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4, 65536, 16384, G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_AUTORECOVER,
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g_param_spec_boolean ("autorecover", "Automatic xrun recovery", "When TRUE tries to reduce processor load on xruns",
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TRUE, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
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@ -292,6 +292,12 @@ gst_alsa_init (GstAlsa *this)
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/* init values */
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this->handle = NULL;
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this->transmit = NULL;
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for (i = 0; i < GST_ALSA_MAX_CHANNELS; i++) {
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this->pads[i].pad = NULL;
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this->pads[i].data = NULL;
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this->pads[i].size = 0;
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this->pads[i].buf = NULL;
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}
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GST_FLAG_SET (this, GST_ELEMENT_THREAD_SUGGESTED);
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@ -299,7 +305,6 @@ gst_alsa_init (GstAlsa *this)
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this->stream = SND_PCM_STREAM_CAPTURE;
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gst_element_set_loop_function (GST_ELEMENT (this), gst_alsa_src_loop);
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this->pads[0].pad = gst_pad_new_from_template (gst_alsa_src_pad_factory (), "src");
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this->pads[0].bs = NULL;
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gst_pad_set_bufferpool_function(this->pads[0].pad, gst_alsa_src_get_buffer_pool);
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/* set the rate to a sensible value. we can't have gobject construct this
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@ -309,13 +314,9 @@ gst_alsa_init (GstAlsa *this)
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this->stream = SND_PCM_STREAM_PLAYBACK;
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gst_element_set_loop_function (GST_ELEMENT (this), gst_alsa_sink_loop);
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this->pads[0].pad = gst_pad_new_from_template (gst_alsa_sink_pad_factory (), "sink");
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this->pads[0].bs = gst_bytestream_new (this->pads[0].pad);
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}
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gst_element_add_pad (GST_ELEMENT (this), this->pads[0].pad);
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for (i = 1; i < GST_ALSA_MAX_CHANNELS; i++) {
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this->pads[i].pad = NULL;
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}
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gst_pad_set_link_function (this->pads[0].pad, gst_alsa_link);
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gst_pad_set_getcaps_function (this->pads[0].pad, gst_alsa_get_caps);
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@ -327,12 +328,13 @@ gst_alsa_dispose (GObject *object)
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gint i;
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GstAlsa *this = GST_ALSA (object);
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G_OBJECT_CLASS (parent_class)->dispose (object);
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for (i = 0; i < ((GstElement *) this)->numpads; i++) {
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if (this->pads[i].bs)
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gst_bytestream_destroy (this->pads[i].bs);
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if (this->pads[i].buf) {
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gst_data_unref (GST_DATA (this->pads[i].buf));
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}
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}
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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gst_alsa_set_property (GObject *object, guint prop_id, const GValue *value,
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@ -535,9 +537,7 @@ found_channel:
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gst_pad_set_link_function (this->pads[channel].pad, gst_alsa_link);
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gst_pad_set_getcaps_function (this->pads[channel].pad, gst_alsa_get_caps);
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gst_element_add_pad (GST_ELEMENT (this), this->pads[channel].pad);
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if (G_OBJECT_TYPE (this) == GST_TYPE_ALSA_SINK)
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this->pads[channel].bs = gst_bytestream_new (this->pads[channel].pad);
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else
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if (G_OBJECT_TYPE (this) == GST_TYPE_ALSA_SRC)
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gst_pad_set_bufferpool_function(this->pads[channel].pad, gst_alsa_src_get_buffer_pool);
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return this->pads[channel].pad;
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@ -967,8 +967,12 @@ gst_alsa_change_state (GstElement *element)
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g_free (this->format);
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this->format = NULL;
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for (i = 0; i < element->numpads; i++) {
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if (this->pads[i].bs)
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gst_bytestream_reset (this->pads[i].bs);
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if (this->pads[i].buf) {
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gst_data_unref (GST_DATA (this->pads[i].buf));
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this->pads[i].buf = NULL;
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this->pads[i].data = NULL;
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this->pads[i].size = 0;
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}
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}
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break;
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case GST_STATE_READY_TO_NULL:
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@ -1137,35 +1141,18 @@ gst_alsa_sink_loop (GstElement *element)
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{
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snd_pcm_sframes_t avail, avail2, copied;
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gint i;
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gint bytes, num_bytes; /* per channel */
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guint bytes; /* per channel */
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GstAlsa *this = GST_ALSA (element);
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g_return_if_fail (this != NULL);
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/* caps nego: fetch 1 byte from every pad */
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if (this->format == NULL) {
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GST_DEBUG (GST_CAT_NEGOTIATION, "starting caps negotiation");
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for (i = 0; i < element->numpads; i++) {
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g_assert (this->pads[i].pad != NULL);
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do {
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num_bytes = gst_bytestream_peek_bytes (this->pads[i].bs, &this->pads[i].data, 1);
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} while (num_bytes == 0 && gst_alsa_sink_check_event (this, i));
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if (num_bytes == 0)
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return;
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}
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if (this->format == NULL) {
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gst_element_error (GST_ELEMENT (this), "alsasink: No caps available");
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return;
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}
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}
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sink_restart:
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avail = gst_alsa_update_avail (this);
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if (avail == -EPIPE) goto sink_restart;
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if (avail < 0) return;
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if (avail > 0) {
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int width = snd_pcm_format_physical_width (this->format->format);
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int width;
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/* Not enough space. We grab data nonetheless and sleep afterwards */
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if (avail < this->period_size) {
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@ -1173,17 +1160,33 @@ sink_restart:
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}
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/* check how many bytes we still have in all our bytestreams */
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bytes = avail * ( width / 8 ) * (element->numpads == 1 ? this->format->channels : 1);
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bytes = G_MAXUINT;
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for (i = 0; i < element->numpads; i++) {
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g_assert (this->pads[i].pad != NULL);
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do {
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num_bytes = gst_bytestream_peek_bytes (this->pads[i].bs, &this->pads[i].data, bytes);
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} while (num_bytes == 0 && gst_alsa_sink_check_event (this, i));
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if (num_bytes == 0)
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return;
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bytes = MIN (bytes, num_bytes);
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GstAlsaPad *pad = &this->pads[i];
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g_assert (pad->pad != NULL);
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while (pad->size == 0) {
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pad->buf = gst_pad_pull (pad->pad);
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if (GST_IS_EVENT (pad->buf)) {
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gboolean cont = gst_alsa_sink_check_event (this, i, GST_EVENT (pad->buf));
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gst_data_unref (GST_DATA (pad->buf));
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pad->buf = NULL;
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if (cont)
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continue;
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return;
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}
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pad->size = pad->buf->size;
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pad->data = pad->buf->data;
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}
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bytes = MIN (bytes, pad->size);
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}
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avail = bytes / (width / 8 ) / (element->numpads == 1 ? this->format->channels : 1);
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/* caps nego failed somewhere */
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if (this->format == NULL) {
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gst_element_error (GST_ELEMENT (this), "alsasink: No caps available");
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return;
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}
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width = snd_pcm_format_physical_width (this->format->format);
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avail = MIN (avail, bytes / (width / 8 ) / (element->numpads == 1 ? this->format->channels : 1));
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/* wait until the hw buffer has enough space */
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while (gst_element_get_state (element) == GST_STATE_PLAYING && (avail2 = gst_alsa_update_avail (this)) < avail) {
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@ -1203,8 +1206,17 @@ sink_restart:
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/* flush the data */
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bytes = copied * ( width / 8 ) * (element->numpads == 1 ? this->format->channels : 1);
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for (i = 0; i < element->numpads; i++)
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gst_bytestream_flush (this->pads[i].bs, bytes);
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for (i = 0; i < element->numpads; i++) {
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GstAlsaPad *pad = &this->pads[i];
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if ((pad->size -= bytes) == 0) {
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gst_data_unref (GST_DATA (pad->buf));
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pad->buf = NULL; /* needed? */
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pad->data = NULL; /* needed? */
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continue;
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}
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g_assert (pad->size > 0);
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pad->data += bytes;
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}
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}
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if (snd_pcm_state(this->handle) != SND_PCM_STATE_RUNNING && snd_pcm_avail_update (this->handle) == 0) {
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@ -1267,10 +1279,10 @@ src_restart:
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/* push the data to gstreamer if it's big enough to fill up a buffer. */
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for (i = 0; i < element->numpads; i++) {
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pad = &this->pads[i];
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pad->offset += MIN (copied, this->period_size - pad->offset);
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pad->size += MIN (copied, this->period_size - pad->size);
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if (pad->offset >= this->period_size) {
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g_assert (pad->offset <= this->period_size);
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if (pad->size >= this->period_size) {
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g_assert (pad->size <= this->period_size);
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buf = gst_buffer_new_from_pool (pool, 0, 0);
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@ -1281,7 +1293,7 @@ src_restart:
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gst_pad_push (pad->pad, buf);
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pad->data = NULL;
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pad->offset = 0;
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pad->size = 0;
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}
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}
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@ -1335,14 +1347,10 @@ gst_alsa_xrun_recovery (GstAlsa *this)
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/* TRUE, if everything should continue */
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static gboolean
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gst_alsa_sink_check_event (GstAlsa *this, gint pad_nr)
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gst_alsa_sink_check_event (GstAlsa *this, gint pad_nr, GstEvent *event)
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{
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GstEvent *event = NULL;
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guint32 avail;
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gboolean cont = TRUE;
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gst_bytestream_get_status (this->pads[pad_nr].bs, &avail, &event);
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if (event) {
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_EOS:
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@ -27,8 +27,6 @@
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#include <alsa/asoundlib.h>
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#include <gst/gst.h>
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#include <gst/bytestream/bytestream.h>
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#include <glib.h>
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#define GST_ALSA_MAX_CHANNELS 64 /* we don't support more than 64 channels */
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#define GST_ALSA_MIN_RATE 8000
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@ -87,9 +85,9 @@ typedef int (*GstAlsaTransmitFunction) (GstAlsa *this, snd_pcm_sframes_t *avail)
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typedef struct {
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GstPad *pad;
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GstByteStream *bs;
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guint8 *data;
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guint8 offset;
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guint8 *data; /* pointer into buffer */
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guint size; /* sink: bytes left in buffer */
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GstBuffer *buf; /* current buffer */
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} GstAlsaPad;
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typedef struct {
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snd_pcm_format_t format;
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