On 1/18/22 3:27 PM, Daniel Baluta wrote:
> From: Paul Olaru <paul.olaru@xxxxxxx>
>
> These functions are used by the userspace to determine what the firmware
> supports and tools like cplay should use in terms of sample rate, bit
> rate, buffer size and channel count.
>
> The current implementation uses i.MX8 tested scenarios!
>
> Signed-off-by: Paul Olaru <paul.olaru@xxxxxxx>
> Signed-off-by: Daniel Baluta <daniel.baluta@xxxxxxx>
> ---
> sound/soc/sof/compress.c | 74 ++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 74 insertions(+)
>
> diff --git a/sound/soc/sof/compress.c b/sound/soc/sof/compress.c
> index 91a9c95929cd..e3f3f309f312 100644
> --- a/sound/soc/sof/compress.c
> +++ b/sound/soc/sof/compress.c
> @@ -308,6 +308,78 @@ static int sof_compr_pointer(struct snd_soc_component *component,
> return 0;
> }
>
> +static int sof_compr_get_caps(struct snd_soc_component *component,
> + struct snd_compr_stream *cstream,
> + struct snd_compr_caps *caps)
> +{
> + caps->num_codecs = 3;
> + caps->min_fragment_size = 3840;
> + caps->max_fragment_size = 3840;
> + caps->min_fragments = 2;
> + caps->max_fragments = 2;
> + caps->codecs[0] = SND_AUDIOCODEC_MP3;
> + caps->codecs[1] = SND_AUDIOCODEC_AAC;
> + caps->codecs[2] = SND_AUDIOCODEC_PCM;
I don't think you can add this unconditionally for all
devices/platforms, clearly this wouldn't be true for Intel for now.
If the information is not part of a firmware manifest or topology, then
it's likely we have to use an abstraction layer to add this for specific
platforms.
it's really a bit odd to hard-code all of this at the kernel level, this
was not really what I had in mind when we come up with the concept of
querying capabilities. I understand though that for testing this is
convenient, so maybe this can become a set of fall-back properties in
case the firmware doesn't advertise anything.
> +
> + return 0;
> +}
> +
> +static struct snd_compr_codec_caps caps_pcm = {
> + .num_descriptors = 1,
> + .descriptor[0].max_ch = 2,
> + .descriptor[0].sample_rates[0] = 48000,
> + .descriptor[0].num_sample_rates = 1,
> + .descriptor[0].bit_rate = {1536, 3072},
> + .descriptor[0].num_bitrates = 2,
> + .descriptor[0].profiles = SND_AUDIOPROFILE_PCM,
> + .descriptor[0].modes = 0,
> + .descriptor[0].formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
> +};
> +
> +static struct snd_compr_codec_caps caps_mp3 = {
> + .num_descriptors = 1,
> + .descriptor[0].max_ch = 2,
> + .descriptor[0].sample_rates[0] = 48000,
> + .descriptor[0].num_sample_rates = 1,
> + .descriptor[0].bit_rate = {32, 40, 48, 56, 64, 80, 96, 112, 224, 256, 320},
> + .descriptor[0].num_bitrates = 11,
> + .descriptor[0].profiles = 0,
> + .descriptor[0].modes = SND_AUDIOCHANMODE_MP3_STEREO,
> + .descriptor[0].formats = 0,
> +};
> +
> +static struct snd_compr_codec_caps caps_aac = {
> + .num_descriptors = 1,
> + .descriptor[0].max_ch = 2,
> + .descriptor[0].sample_rates[0] = 48000,
> + .descriptor[0].num_sample_rates = 1,
> + .descriptor[0].bit_rate = {128, 192},
> + .descriptor[0].num_bitrates = 2,
> + .descriptor[0].profiles = 0,
> + .descriptor[0].modes = 0,
> + .descriptor[0].formats = SND_AUDIOSTREAMFORMAT_MP4ADTS | SND_AUDIOSTREAMFORMAT_MP2ADTS,
> +};
> +
> +static int sof_compr_get_codec_caps(struct snd_soc_component *component,
> + struct snd_compr_stream *cstream,
> + struct snd_compr_codec_caps *codec)
> +{
> + switch (codec->codec) {
> + case SND_AUDIOCODEC_MP3:
> + *codec = caps_mp3;
> + break;
> + case SND_AUDIOCODEC_AAC:
> + *codec = caps_aac;
> + break;
> + case SND_AUDIOCODEC_PCM:
> + *codec = caps_pcm;
> + break;
> + default:
> + return -EINVAL;
> + }
> + return 0;
> +}
> +
> struct snd_compress_ops sof_compressed_ops = {
> .open = sof_compr_open,
> .free = sof_compr_free,
> @@ -316,5 +388,7 @@ struct snd_compress_ops sof_compressed_ops = {
> .trigger = sof_compr_trigger,
> .pointer = sof_compr_pointer,
> .copy = sof_compr_copy,
> + .get_caps = sof_compr_get_caps,
> + .get_codec_caps = sof_compr_get_codec_caps,
> };
> EXPORT_SYMBOL(sof_compressed_ops);
>
