Audio: Cadence: Add an open-source PCM decoder

This patch adds a PCM decoder that is compatible with Cadence
codec API. It allows to test tinycompress cplay playback
with wav format files.

Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>

Author: singalsu

src/audio/base_fw.c

@@ -99,6 +99,10 @@ static void get_codec_info(struct sof_tlv **tuple)
 	codec_info.items[codec_info.count++] =
 		SET_CODEC_INFO_ITEM(SND_AUDIOCODEC_VORBIS, SOF_IPC_STREAM_PLAYBACK);
 #endif
+#ifdef CONFIG_SOF_COMPRESS_CODEC_PCM_DEC
+	codec_info.items[codec_info.count++] =
+	    SET_CODEC_INFO_ITEM(SND_AUDIOCODEC_PCM, SOF_IPC_STREAM_PLAYBACK);
+#endif
 
 	if (!codec_info.count)
 		return;

src/audio/module_adapter/CMakeLists.txt

@@ -33,6 +33,9 @@ endif()
 		zephyr_library_import(xa_mp3_enc ${CONFIG_CADENCE_CODEC_MP3_ENC_LIB})
 	endif()
 
+	zephyr_library_sources_ifdef(CONFIG_SOF_COMPRESS_CODEC_PCM_DEC
+		module/cadence_other/xa_pcm_dec.c)
+
 	if (CONFIG_COMP_DOLBY_DAX_AUDIO_PROCESSING)
 		if(CONFIG_COMP_DOLBY_DAX_AUDIO_PROCESSING STREQUAL "m" AND DEFINED CONFIG_LLEXT)
 			add_subdirectory(module/dolby/llext
@@ -147,6 +150,10 @@ if(NOT CONFIG_COMP_MODULE_SHARED_LIBRARY_BUILD)
 
 	endif()
 
+	if(CONFIG_SOF_COMPRESS_CODEC_PCM_DEC)
+		add_subdirectory(module/cadence_other)
+	endif()
+
 	if(CONFIG_COMP_DOLBY_DAX_AUDIO_PROCESSING)
 		target_include_directories(sof PRIVATE ${PROJECT_SOURCE_DIR}/third_party/include)
 		add_local_sources(sof module/dolby/dax.c)

src/audio/module_adapter/Kconfig

@@ -173,6 +173,16 @@ if CADENCE_CODEC
 		  This option is a string and takes the full name of the SRC library binary.
 	endif
 
+	config SOF_COMPRESS_CODEC_PCM_DEC
+		bool "SOF PCM (WAV) decoder"
+		help
+		  Select to enable PCM (WAV) decoder.
+		  This provides PCM/WAV file decoding support through a simple
+		  implementation that handles the PCM data. Note that this is not
+		  a Cadence codec module but an open-source addition to support the
+		  PCM data format. In addition need to build the cplay from
+		  tinycompress with option --enable-pcm to use this.
+
 endif # Cadence
 
 	config COMP_DOLBY_DAX_AUDIO_PROCESSING

src/audio/module_adapter/module/cadence.c

@@ -74,6 +74,12 @@ struct cadence_api cadence_api_table[] = {
 		.api = xa_src_pp,
 	},
 #endif
+#ifdef CONFIG_SOF_COMPRESS_CODEC_PCM_DEC
+	{
+		.id = SOF_COMPRESS_CODEC_PCM_DEC_ID,
+		.api = xa_pcm_dec,
+	},
+#endif
 };
 
 static int cadence_codec_get_api_id(uint32_t compress_id, uint32_t direction)
@@ -89,6 +95,8 @@ static int cadence_codec_get_api_id(uint32_t compress_id, uint32_t direction)
 		return CADENCE_CODEC_AAC_DEC_ID;
 	case SND_AUDIOCODEC_VORBIS:
 		return CADENCE_CODEC_VORBIS_DEC_ID;
+	case SND_AUDIOCODEC_PCM:
+		return SOF_COMPRESS_CODEC_PCM_DEC_ID;
 	default:
 		return -EINVAL;
 	}
@@ -236,6 +244,9 @@ int cadence_codec_get_samples(struct processing_module *mod)
 		return 1152;
 	case CADENCE_CODEC_AAC_DEC_ID:
 		return 1024;
+	case SOF_COMPRESS_CODEC_PCM_DEC_ID:
+		/* Not critical for PCM, use 1024 for consistency */
+		return 1024;
 	default:
 		break;
 	}

src/audio/module_adapter/module/cadence_ipc4.c

@@ -209,6 +209,9 @@ static int cadence_configure_codec_params(struct processing_module *mod)
 	case CADENCE_CODEC_VORBIS_DEC_ID:
 		/* No configuration needed for Vorbis */
 		return 0;
+	case SOF_COMPRESS_CODEC_PCM_DEC_ID:
+		/* No configuration needed for PCM decoder */
+		return 0;
 	default:
 		break;
 	}

src/audio/module_adapter/module/cadence_other/CMakeLists.txt

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: BSD-3-Clause
+
+if(CONFIG_SOF_COMPRESS_CODEC_PCM_DEC)
+	add_local_sources(sof xa_pcm_dec.c)
+endif()