spa: add ALAC format

spa/include/spa/param/audio/alac-utils.h

@@ -0,0 +1,79 @@
+/* Simple Plugin API
+ *
+ * Copyright © 2023 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef SPA_AUDIO_ALAC_UTILS_H
+#define SPA_AUDIO_ALAC_UTILS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \addtogroup spa_param
+ * \{
+ */
+
+#include <spa/pod/parser.h>
+#include <spa/pod/builder.h>
+#include <spa/param/audio/format.h>
+#include <spa/param/format-utils.h>
+
+static inline int
+spa_format_audio_alac_parse(const struct spa_pod *format, struct spa_audio_info_alac *info)
+{
+	int res;
+	res = spa_pod_parse_object(format,
+			SPA_TYPE_OBJECT_Format, NULL,
+			SPA_FORMAT_AUDIO_rate,		SPA_POD_OPT_Int(&info->rate),
+			SPA_FORMAT_AUDIO_channels,	SPA_POD_OPT_Int(&info->channels));
+	return res;
+}
+
+static inline struct spa_pod *
+spa_format_audio_alac_build(struct spa_pod_builder *builder, uint32_t id, struct spa_audio_info_alac *info)
+{
+	struct spa_pod_frame f;
+	spa_pod_builder_push_object(builder, &f, SPA_TYPE_OBJECT_Format, id);
+	spa_pod_builder_add(builder,
+			SPA_FORMAT_mediaType,		SPA_POD_Id(SPA_MEDIA_TYPE_audio),
+			SPA_FORMAT_mediaSubtype,	SPA_POD_Id(SPA_MEDIA_SUBTYPE_alac),
+			0);
+	if (info->rate != 0)
+		spa_pod_builder_add(builder,
+			SPA_FORMAT_AUDIO_rate,		SPA_POD_Int(info->rate), 0);
+	if (info->channels != 0)
+		spa_pod_builder_add(builder,
+			SPA_FORMAT_AUDIO_channels,	SPA_POD_Int(info->channels), 0);
+	return (struct spa_pod*)spa_pod_builder_pop(builder, &f);
+}
+
+/**
+ * \}
+ */
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* SPA_AUDIO_ALAC_UTILS_H */

spa/include/spa/param/audio/alac.h

@@ -0,0 +1,49 @@
+/* Simple Plugin API
+ *
+ * Copyright © 2023 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef SPA_AUDIO_ALAC_H
+#define SPA_AUDIO_ALAC_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <spa/param/audio/raw.h>
+
+struct spa_audio_info_alac {
+	uint32_t rate;				/*< sample rate */
+	uint32_t channels;			/*< number of channels */
+};
+
+#define SPA_AUDIO_INFO_ALAC_INIT(...)		((struct spa_audio_info_alac) { __VA_ARGS__ })
+
+/**
+ * \}
+ */
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* SPA_AUDIO_ALAC_H */

spa/include/spa/param/audio/format-utils.h

@@ -44,6 +44,7 @@ extern "C" {
 #include <spa/param/audio/wma-utils.h>
 #include <spa/param/audio/ra-utils.h>
 #include <spa/param/audio/amr-utils.h>
+#include <spa/param/audio/alac-utils.h>
 
 
 /**
@@ -83,6 +84,8 @@ spa_format_audio_parse(const struct spa_pod *format, struct spa_audio_info *info
 		return spa_format_audio_ra_parse(format, &info->info.ra);
 	case SPA_MEDIA_SUBTYPE_amr:
 		return spa_format_audio_amr_parse(format, &info->info.amr);
+	case SPA_MEDIA_SUBTYPE_alac:
+		return spa_format_audio_alac_parse(format, &info->info.alac);
 	}
 	return -ENOTSUP;
 }
@@ -111,6 +114,8 @@ spa_format_audio_build(struct spa_pod_builder *builder, uint32_t id, struct spa_
 		return spa_format_audio_ra_build(builder, id, &info->info.ra);
 	case SPA_MEDIA_SUBTYPE_amr:
 		return spa_format_audio_amr_build(builder, id, &info->info.amr);
+	case SPA_MEDIA_SUBTYPE_alac:
+		return spa_format_audio_alac_build(builder, id, &info->info.alac);
 	}
 	errno = ENOTSUP;
 	return NULL;

spa/include/spa/param/audio/format.h

@@ -45,6 +45,7 @@ extern "C" {
 #include <spa/param/audio/wma.h>
 #include <spa/param/audio/ra.h>
 #include <spa/param/audio/amr.h>
+#include <spa/param/audio/alac.h>
 
 struct spa_audio_info {
 	uint32_t media_type;
@@ -60,6 +61,7 @@ struct spa_audio_info {
 		struct spa_audio_info_wma wma;
 		struct spa_audio_info_ra ra;
 		struct spa_audio_info_amr amr;
+		struct spa_audio_info_alac alac;
 	} info;
 };
 

spa/include/spa/param/format-types.h

@@ -80,6 +80,7 @@ static const struct spa_type_info spa_type_media_subtype[] = {
 	{ SPA_MEDIA_SUBTYPE_g729, SPA_TYPE_Int, SPA_TYPE_INFO_MEDIA_SUBTYPE_BASE "g729", NULL },
 	{ SPA_MEDIA_SUBTYPE_amr, SPA_TYPE_Int, SPA_TYPE_INFO_MEDIA_SUBTYPE_BASE "amr", NULL },
 	{ SPA_MEDIA_SUBTYPE_gsm, SPA_TYPE_Int, SPA_TYPE_INFO_MEDIA_SUBTYPE_BASE "gsm", NULL },
+	{ SPA_MEDIA_SUBTYPE_alac, SPA_TYPE_Int, SPA_TYPE_INFO_MEDIA_SUBTYPE_BASE "alac", NULL },
 	/* video subtypes */
 	{ SPA_MEDIA_SUBTYPE_h264, SPA_TYPE_Int, SPA_TYPE_INFO_MEDIA_SUBTYPE_BASE "h264", NULL },
 	{ SPA_MEDIA_SUBTYPE_mjpg, SPA_TYPE_Int, SPA_TYPE_INFO_MEDIA_SUBTYPE_BASE "mjpg", NULL },

spa/include/spa/param/format.h

@@ -68,6 +68,7 @@ enum spa_media_subtype {
 	SPA_MEDIA_SUBTYPE_g729,
 	SPA_MEDIA_SUBTYPE_amr,
 	SPA_MEDIA_SUBTYPE_gsm,
+	SPA_MEDIA_SUBTYPE_alac,		/** since 0.3.65 */
 
 	SPA_MEDIA_SUBTYPE_START_Video	= 0x20000,
 	SPA_MEDIA_SUBTYPE_h264,