aboutsummaryrefslogtreecommitdiffstats
path: root/src/output/jack_output_plugin.c
diff options
context:
space:
mode:
authorMax Kellermann <max@duempel.org>2009-11-06 18:58:35 +0100
committerMax Kellermann <max@duempel.org>2009-11-06 18:58:35 +0100
commitba34d48cf093cbfbe9d6e63e7177ba79791c6a4a (patch)
tree230dc6320531c14ee96dc153833dddeaf71ad498 /src/output/jack_output_plugin.c
parent2598dd510910d3a39eb665216760a705c26ccf50 (diff)
downloadmpd-ba34d48cf093cbfbe9d6e63e7177ba79791c6a4a.tar.gz
mpd-ba34d48cf093cbfbe9d6e63e7177ba79791c6a4a.tar.xz
mpd-ba34d48cf093cbfbe9d6e63e7177ba79791c6a4a.zip
output/jack: dynamic source port list
Same as the previous patch: create up to 16 configured source ports. The plugin tries to do its best at guessing the right combination for the given input file, the number of source and destination ports.
Diffstat (limited to 'src/output/jack_output_plugin.c')
-rw-r--r--src/output/jack_output_plugin.c111
1 files changed, 74 insertions, 37 deletions
diff --git a/src/output/jack_output_plugin.c b/src/output/jack_output_plugin.c
index 14493715f..d2f7747dc 100644
--- a/src/output/jack_output_plugin.c
+++ b/src/output/jack_output_plugin.c
@@ -42,10 +42,6 @@ enum {
static const size_t sample_size = sizeof(jack_default_audio_sample_t);
-static const char *const port_names[2] = {
- "left", "right",
-};
-
struct jack_data {
/**
* libjack options passed to jack_client_open().
@@ -56,6 +52,9 @@ struct jack_data {
/* configuration */
+ char *source_ports[MAX_PORTS];
+ unsigned num_source_ports;
+
char *destination_ports[MAX_PORTS];
unsigned num_destination_ports;
@@ -65,9 +64,9 @@ struct jack_data {
struct audio_format audio_format;
/* jack library stuff */
- jack_port_t *ports[2];
+ jack_port_t *ports[MAX_PORTS];
jack_client_t *client;
- jack_ringbuffer_t *ringbuffer[2];
+ jack_ringbuffer_t *ringbuffer[MAX_PORTS];
bool shutdown;
@@ -126,6 +125,16 @@ mpd_jack_process(jack_nframes_t nframes, void *arg)
out[available++] = 0.0;
}
+ /* generate silence for the unused source ports */
+
+ for (unsigned i = jd->audio_format.channels;
+ i < jd->num_source_ports; ++i) {
+ out = jack_port_get_buffer(jd->ports[i], nframes);
+
+ for (jack_nframes_t f = 0; f < nframes; ++f)
+ out[f] = 0.0;
+ }
+
return 0;
}
@@ -141,7 +150,9 @@ set_audioformat(struct jack_data *jd, struct audio_format *audio_format)
{
audio_format->sample_rate = jack_get_sample_rate(jd->client);
- if (audio_format->channels > 2)
+ if (jd->num_source_ports == 1)
+ audio_format->channels = 1;
+ else if (audio_format->channels > jd->num_source_ports)
audio_format->channels = 2;
if (audio_format->bits != 16 && audio_format->bits != 24)
@@ -200,14 +211,15 @@ mpd_jack_connect(struct jack_data *jd, GError **error_r)
jack_set_process_callback(jd->client, mpd_jack_process, jd);
jack_on_shutdown(jd->client, mpd_jack_shutdown, jd);
- for (unsigned i = 0; i < G_N_ELEMENTS(jd->ports); ++i) {
- jd->ports[i] = jack_port_register(jd->client, port_names[i],
+ for (unsigned i = 0; i < jd->num_source_ports; ++i) {
+ jd->ports[i] = jack_port_register(jd->client,
+ jd->source_ports[i],
JACK_DEFAULT_AUDIO_TYPE,
JackPortIsOutput, 0);
if (jd->ports[i] == NULL) {
g_set_error(error_r, jack_output_quark(), 0,
"Cannot register output port \"%s\"",
- port_names[i]);
+ jd->source_ports[i]);
mpd_jack_disconnect(jd);
return false;
}
@@ -272,6 +284,16 @@ mpd_jack_init(G_GNUC_UNUSED const struct audio_format *audio_format,
if (!config_get_block_bool(param, "autostart", false))
jd->options |= JackNoStartServer;
+ /* configure the source ports */
+
+ value = config_get_block_string(param, "source_ports", "left,right");
+ jd->num_source_ports = parse_port_list(param->line, value,
+ jd->source_ports, error_r);
+ if (jd->num_source_ports == 0)
+ return NULL;
+
+ /* configure the destination ports */
+
value = config_get_block_string(param, "destination_ports", NULL);
if (value == NULL) {
/* compatibility with MPD < 0.16 */
@@ -291,6 +313,13 @@ mpd_jack_init(G_GNUC_UNUSED const struct audio_format *audio_format,
jd->num_destination_ports = 0;
}
+ if (jd->num_destination_ports > 0 &&
+ jd->num_destination_ports != jd->num_source_ports)
+ g_warning("number of source ports (%u) mismatches the "
+ "number of destination ports (%u) in line %d",
+ jd->num_source_ports, jd->num_destination_ports,
+ param->line);
+
jd->ringbuffer_size =
config_get_block_unsigned(param, "ringbuffer_size", 32768);
@@ -319,7 +348,7 @@ mpd_jack_enable(void *data, GError **error_r)
{
struct jack_data *jd = (struct jack_data *)data;
- for (unsigned i = 0; i < G_N_ELEMENTS(jd->ringbuffer); ++i)
+ for (unsigned i = 0; i < jd->num_source_ports; ++i)
jd->ringbuffer[i] = NULL;
return mpd_jack_connect(jd, error_r);
@@ -333,7 +362,7 @@ mpd_jack_disable(void *data)
if (jd->client != NULL)
mpd_jack_disconnect(jd);
- for (unsigned i = 0; i < G_N_ELEMENTS(jd->ringbuffer); ++i) {
+ for (unsigned i = 0; i < jd->num_source_ports; ++i) {
if (jd->ringbuffer[i] != NULL) {
jack_ringbuffer_free(jd->ringbuffer[i]);
jd->ringbuffer[i] = NULL;
@@ -364,15 +393,17 @@ static bool
mpd_jack_start(struct jack_data *jd, GError **error_r)
{
const char *destination_ports[MAX_PORTS], **jports;
+ const char *duplicate_port = NULL;
unsigned num_destination_ports;
assert(jd->client != NULL);
+ assert(jd->audio_format.channels <= jd->num_source_ports);
/* allocate the ring buffers on the first open(); these
persist until MPD exits. It's too unsafe to delete them
because we can never know when mpd_jack_process() gets
called */
- for (unsigned i = 0; i < G_N_ELEMENTS(jd->ringbuffer); ++i) {
+ for (unsigned i = 0; i < jd->num_source_ports; ++i) {
if (jd->ringbuffer[i] == NULL)
jd->ringbuffer[i] =
jack_ringbuffer_create(jd->ringbuffer_size);
@@ -425,16 +456,26 @@ mpd_jack_start(struct jack_data *jd, GError **error_r)
assert(num_destination_ports > 0);
- if (jd->audio_format.channels == 2 && num_destination_ports == 1) {
+ if (jd->audio_format.channels >= 2 && num_destination_ports == 1) {
/* mix stereo signal on one speaker */
- destination_ports[1] = destination_ports[0];
- num_destination_ports = 2;
+ while (num_destination_ports < jd->audio_format.channels)
+ destination_ports[num_destination_ports++] =
+ destination_ports[0];
+ } else if (num_destination_ports > jd->audio_format.channels) {
+ if (jd->audio_format.channels == 1 && num_destination_ports > 2) {
+ /* mono input file: connect the one source
+ channel to the both destination channels */
+ duplicate_port = destination_ports[1];
+ num_destination_ports = 1;
+ } else
+ /* connect only as many ports as we need */
+ num_destination_ports = jd->audio_format.channels;
}
- assert(jd->audio_format.channels <= num_destination_ports);
+ assert(num_destination_ports <= jd->num_source_ports);
- for (unsigned i = 0; i < jd->audio_format.channels; ++i) {
+ for (unsigned i = 0; i < num_destination_ports; ++i) {
int ret;
ret = jack_connect(jd->client, jack_port_name(jd->ports[i]),
@@ -452,17 +493,17 @@ mpd_jack_start(struct jack_data *jd, GError **error_r)
}
}
- if (jd->audio_format.channels == 1 && num_destination_ports == 2) {
+ if (duplicate_port != NULL) {
/* mono input file: connect the one source channel to
the both destination channels */
int ret;
ret = jack_connect(jd->client, jack_port_name(jd->ports[0]),
- destination_ports[1]);
+ duplicate_port);
if (ret != 0) {
g_set_error(error_r, jack_output_quark(), 0,
"Not a valid JACK port: %s",
- destination_ports[1]);
+ duplicate_port);
if (jports != NULL)
free(jports);
@@ -518,15 +559,12 @@ mpd_jack_write_samples_16(struct jack_data *jd, const int16_t *src,
unsigned num_samples)
{
jack_default_audio_sample_t sample;
+ unsigned i;
while (num_samples-- > 0) {
- sample = sample_16_to_jack(*src++);
- jack_ringbuffer_write(jd->ringbuffer[0], (void*)&sample,
- sizeof(sample));
-
- if (jd->audio_format.channels >= 2) {
+ for (i = 0; i < jd->audio_format.channels; ++i) {
sample = sample_16_to_jack(*src++);
- jack_ringbuffer_write(jd->ringbuffer[1], (void*)&sample,
+ jack_ringbuffer_write(jd->ringbuffer[i], (void*)&sample,
sizeof(sample));
}
}
@@ -543,15 +581,12 @@ mpd_jack_write_samples_24(struct jack_data *jd, const int32_t *src,
unsigned num_samples)
{
jack_default_audio_sample_t sample;
+ unsigned i;
while (num_samples-- > 0) {
- sample = sample_24_to_jack(*src++);
- jack_ringbuffer_write(jd->ringbuffer[0], (void*)&sample,
- sizeof(sample));
-
- if (jd->audio_format.channels >= 2) {
+ for (i = 0; i < jd->audio_format.channels; ++i) {
sample = sample_24_to_jack(*src++);
- jack_ringbuffer_write(jd->ringbuffer[1], (void*)&sample,
+ jack_ringbuffer_write(jd->ringbuffer[i], (void*)&sample,
sizeof(sample));
}
}
@@ -598,10 +633,12 @@ mpd_jack_play(void *data, const void *chunk, size_t size, GError **error_r)
}
space = jack_ringbuffer_write_space(jd->ringbuffer[0]);
- space1 = jack_ringbuffer_write_space(jd->ringbuffer[1]);
- if (space > space1)
- /* send data symmetrically */
- space = space1;
+ for (unsigned i = 1; i < jd->audio_format.channels; ++i) {
+ space1 = jack_ringbuffer_write_space(jd->ringbuffer[i]);
+ if (space > space1)
+ /* send data symmetrically */
+ space = space1;
+ }
if (space >= frame_size)
break;