Implement get_chmap/set_chmap for PCM extplug/ioplug plugins

Added the new ops for both external plugins, so the protocol numbers
are incremented.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

4 files changed, 93 insertions, 3 deletions

diff --git a/include/pcm_extplug.h b/include/pcm_extplug.h
index b14c5be4..4d2543fe 100644
--- a/include/pcm_extplug.h
+++ b/include/pcm_extplug.h
@@ -55,7 +55,7 @@ typedef struct snd_pcm_extplug_callback snd_pcm_extplug_callback_t;
  */
 #define SND_PCM_EXTPLUG_VERSION_MAJOR	1	/**< Protocol major version */
 #define SND_PCM_EXTPLUG_VERSION_MINOR	0	/**< Protocol minor version */
-#define SND_PCM_EXTPLUG_VERSION_TINY	1	/**< Protocol tiny version */
+#define SND_PCM_EXTPLUG_VERSION_TINY	2	/**< Protocol tiny version */
 /**
  * Filter-plugin protocol version
  */
@@ -151,6 +151,18 @@ struct snd_pcm_extplug_callback {
 	 * init; optional initialization called at prepare or reset
 	 */
 	int (*init)(snd_pcm_extplug_t *ext);
+	/**
+	 * query the channel maps; optional; since v1.0.2
+	 */
+	int **(*query_chmaps)(snd_pcm_extplug_t *ext);
+	/**
+	 * get the channel map; optional; since v1.0.2
+	 */
+	int *(*get_chmap)(snd_pcm_extplug_t *ext);
+	/**
+	 * set the channel map; optional; since v1.0.2
+	 */
+	int (*set_chmap)(snd_pcm_extplug_t *ext, const int *map);
 };
 
 
diff --git a/include/pcm_ioplug.h b/include/pcm_ioplug.h
index 6331cf07..c68dc997 100644
--- a/include/pcm_ioplug.h
+++ b/include/pcm_ioplug.h
@@ -66,7 +66,7 @@ typedef struct snd_pcm_ioplug_callback snd_pcm_ioplug_callback_t;
  */
 #define SND_PCM_IOPLUG_VERSION_MAJOR	1	/**< Protocol major version */
 #define SND_PCM_IOPLUG_VERSION_MINOR	0	/**< Protocol minor version */
-#define SND_PCM_IOPLUG_VERSION_TINY	1	/**< Protocol tiny version */
+#define SND_PCM_IOPLUG_VERSION_TINY	2	/**< Protocol tiny version */
 /**
  * IO-plugin protocol version
  */
@@ -186,9 +186,21 @@ struct snd_pcm_ioplug_callback {
 	 */
 	void (*dump)(snd_pcm_ioplug_t *io, snd_output_t *out);
 	/**
-	 * get the delay for the running PCM; optional
+	 * get the delay for the running PCM; optional; since v1.0.1
 	 */
 	int (*delay)(snd_pcm_ioplug_t *io, snd_pcm_sframes_t *delayp);
+	/**
+	 * query the channel maps; optional; since v1.0.2
+	 */
+	int **(*query_chmaps)(snd_pcm_ioplug_t *io);
+	/**
+	 * get the channel map; optional; since v1.0.2
+	 */
+	int *(*get_chmap)(snd_pcm_ioplug_t *io);
+	/**
+	 * set the channel map; optional; since v1.0.2
+	 */
+	int (*set_chmap)(snd_pcm_ioplug_t *io, const int *map);
 };
 
 
diff --git a/src/pcm/pcm_extplug.c b/src/pcm/pcm_extplug.c
index 289fc781..5adc8a1c 100644
--- a/src/pcm/pcm_extplug.c
+++ b/src/pcm/pcm_extplug.c
@@ -425,6 +425,36 @@ static int snd_pcm_extplug_close(snd_pcm_t *pcm)
 	return 0;
 }
 
+static int **snd_pcm_extplug_query_chmaps(snd_pcm_t *pcm)
+{
+	extplug_priv_t *ext = pcm->private_data;
+
+	if (ext->data->version >= 0x010002 &&
+	    ext->data->callback->query_chmaps)
+		return ext->data->callback->query_chmaps(ext->data);
+	return snd_pcm_generic_query_chmaps(pcm);
+}
+
+static int *snd_pcm_extplug_get_chmap(snd_pcm_t *pcm)
+{
+	extplug_priv_t *ext = pcm->private_data;
+
+	if (ext->data->version >= 0x010002 &&
+	    ext->data->callback->get_chmap)
+		return ext->data->callback->get_chmap(ext->data);
+	return snd_pcm_generic_get_chmap(pcm);
+}
+
+static int snd_pcm_extplug_set_chmap(snd_pcm_t *pcm, const int *map)
+{
+	extplug_priv_t *ext = pcm->private_data;
+
+	if (ext->data->version >= 0x010002 &&
+	    ext->data->callback->set_chmap)
+		return ext->data->callback->set_chmap(ext->data, map);
+	return snd_pcm_generic_set_chmap(pcm, map);
+}
+
 static const snd_pcm_ops_t snd_pcm_extplug_ops = {
 	.close = snd_pcm_extplug_close,
 	.info = snd_pcm_generic_info,
@@ -438,6 +468,9 @@ static const snd_pcm_ops_t snd_pcm_extplug_ops = {
 	.async = snd_pcm_generic_async,
 	.mmap = snd_pcm_generic_mmap,
 	.munmap = snd_pcm_generic_munmap,
+	.query_chmaps = snd_pcm_extplug_query_chmaps,
+	.get_chmap = snd_pcm_extplug_get_chmap,
+	.set_chmap = snd_pcm_extplug_set_chmap,
 };
 
 #endif /* !DOC_HIDDEN */
diff --git a/src/pcm/pcm_ioplug.c b/src/pcm/pcm_ioplug.c
index 55be62d2..91a3aac9 100644
--- a/src/pcm/pcm_ioplug.c
+++ b/src/pcm/pcm_ioplug.c
@@ -710,6 +710,36 @@ static int snd_pcm_ioplug_munmap(snd_pcm_t *pcm ATTRIBUTE_UNUSED)
 	return 0;
 }
 
+static int **snd_pcm_ioplug_query_chmaps(snd_pcm_t *pcm)
+{
+	ioplug_priv_t *io = pcm->private_data;
+
+	if (io->data->version >= 0x010002 &&
+	    io->data->callback->query_chmaps)
+		return io->data->callback->query_chmaps(io->data);
+	return NULL;
+}
+
+static int *snd_pcm_ioplug_get_chmap(snd_pcm_t *pcm)
+{
+	ioplug_priv_t *io = pcm->private_data;
+
+	if (io->data->version >= 0x010002 &&
+	    io->data->callback->get_chmap)
+		return io->data->callback->get_chmap(io->data);
+	return NULL;
+}
+
+static int snd_pcm_ioplug_set_chmap(snd_pcm_t *pcm, const int *map)
+{
+	ioplug_priv_t *io = pcm->private_data;
+
+	if (io->data->version >= 0x010002 &&
+	    io->data->callback->set_chmap)
+		return io->data->callback->set_chmap(io->data, map);
+	return -ENXIO;
+}
+
 static void snd_pcm_ioplug_dump(snd_pcm_t *pcm, snd_output_t *out)
 {
 	ioplug_priv_t *io = pcm->private_data;
@@ -760,6 +790,9 @@ static const snd_pcm_ops_t snd_pcm_ioplug_ops = {
 	.dump = snd_pcm_ioplug_dump,
 	.mmap = snd_pcm_ioplug_mmap,
 	.munmap = snd_pcm_ioplug_munmap,
+	.query_chmaps = snd_pcm_ioplug_query_chmaps,
+	.get_chmap = snd_pcm_ioplug_get_chmap,
+	.set_chmap = snd_pcm_ioplug_set_chmap,
 };
 
 static const snd_pcm_fast_ops_t snd_pcm_ioplug_fast_ops = {