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: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Acked-by: Jaroslav Kysela <perex@perex.cz>
Acked-by: Vinod Koul <vkoul@kernel.org>
Link: https://patch.msgid.link/20241212074509.3445859-2-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/include/uapi/sound/compress_params.h b/include/uapi/sound/compress_params.h
index ddc77322d571ca4da025165c08293c3856926e12..bc7648a30746f4632ecf6695868e79550a431dfa 100644 (file)
--- a/include/uapi/sound/compress_params.h
+++ b/include/uapi/sound/compress_params.h
@@ -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