Unverified Commit f4425e3a authored by Shengjiu Wang's avatar Shengjiu Wang Committed by Mark Brown
Browse files

ALSA: compress: Add output rate and output format support 



Add 'pcm_format' for struct snd_codec, add 'pcm_formats' for
struct snd_codec_desc, these are used for accelerator usage.

Current accelerator example is sample rate converter (SRC).
Define struct snd_codec_desc_src for descript minmum and maxmum
sample rates. And add 'src_d' in union snd_codec_options
structure. These are mainly used for capbility query.

Signed-off-by: default avatarJaroslav Kysela <perex@perex.cz>
Signed-off-by: default avatarShengjiu Wang <shengjiu.wang@nxp.com>
Acked-by: default avatarJaroslav Kysela <perex@perex.cz>
Acked-by: default avatarVinod Koul <vkoul@kernel.org>
Link: https://patch.msgid.link/20241212074509.3445859-2-shengjiu.wang@nxp.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent fac04efc

include/uapi/sound/compress_params.h

+21 −2
Original line number Diff line number Diff line
@@ -334,6 +334,14 @@ union snd_codec_options { 
	struct snd_dec_wma wma_d;

	struct snd_dec_alac alac_d;

	struct snd_dec_ape ape_d;

	struct {

		__u32 out_sample_rate;

	} src_d;

} __attribute__((packed, aligned(4)));



struct snd_codec_desc_src {

	__u32 out_sample_rate_min;

	__u32 out_sample_rate_max;

} __attribute__((packed, aligned(4)));



/** struct snd_codec_desc - description of codec capabilities
@@ -347,6 +355,9 @@ union snd_codec_options { 
 * @modes: Supported modes. See SND_AUDIOMODE defines

 * @formats: Supported formats. See SND_AUDIOSTREAMFORMAT defines

 * @min_buffer: Minimum buffer size handled by codec implementation

 * @pcm_formats: Output (for decoders) or input (for encoders)

 *               PCM formats (required to accel mode, 0 for other modes)

 * @u_space: union space (for codec dependent data)

 * @reserved: reserved for future use

 *

 * This structure provides a scalar value for profiles, modes and stream
@@ -370,7 +381,12 @@ struct snd_codec_desc { 
	__u32 modes;

	__u32 formats;

	__u32 min_buffer;

	__u32 reserved[15];

	__u32 pcm_formats;

	union {

		__u32 u_space[6];

		struct snd_codec_desc_src src;

	} __attribute__((packed, aligned(4)));

	__u32 reserved[8];

} __attribute__((packed, aligned(4)));



/** struct snd_codec
@@ -395,6 +411,8 @@ struct snd_codec_desc { 
 * @align: Block alignment in bytes of an audio sample.

 *		Only required for PCM or IEC formats.

 * @options: encoder-specific settings

 * @pcm_format: Output (for decoders) or input (for encoders)

 *               PCM formats (required to accel mode, 0 for other modes)

 * @reserved: reserved for future use

 */
@@ -411,7 +429,8 @@ struct snd_codec { 
	__u32 format;

	__u32 align;

	union snd_codec_options options;

	__u32 reserved[3];

	__u32 pcm_format;

	__u32 reserved[2];

} __attribute__((packed, aligned(4)));



#endif