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ALSA: compress: add flac decoder params

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The current design of sending codec parameters assumes that decoders
will have parsers so they can parse the encoded stream for parameters
and configure the decoder.

But this assumption may not be universally true and we know some DSPs
which do not contain the parsers so additional parameters are required
to be passed.

So add these parameters starting with FLAC decoder. The size of
snd_codec_options is still 120 bytes after this change (due to this
being a union)

Co-developed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20191115102705.649976-2-vkoul@kernel.org
Acked-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Vinod Koul 2019-11-15 15:57:03 +05:30 committed by Mark Brown
parent a3b9ed5577
commit d2522335c9
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1 changed files with 10 additions and 0 deletions
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10
include/uapi/sound/compress_params.h
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@ -317,12 +317,22 @@ struct snd_enc_generic {
__s32 reserved[15]; /* Can be used for SND_AUDIOCODEC_BESPOKE */
} __attribute__((packed, aligned(4)));
struct snd_dec_flac {
__u16 sample_size;
__u16 min_blk_size;
__u16 max_blk_size;
__u16 min_frame_size;
__u16 max_frame_size;
__u16 reserved;
} __attribute__((packed, aligned(4)));
union snd_codec_options {
struct snd_enc_wma wma;
struct snd_enc_vorbis vorbis;
struct snd_enc_real real;
struct snd_enc_flac flac;
struct snd_enc_generic generic;
struct snd_dec_flac flac_d;
} __attribute__((packed, aligned(4)));
/** struct snd_codec_desc - description of codec capabilities