On 1/18/22 3:27 PM, Daniel Baluta wrote:
From: Paul Olaru paul.olaru@nxp.com
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@nxp.com Signed-off-by: Daniel Baluta daniel.baluta@nxp.com
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);