linux-kernel - [PATCH v2 2/2] ASoC: SOF: compress: Implement get_caps and get_codec

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Message-Id: <20220118212732.281657-3-daniel.baluta@oss.nxp.com>
Date:   Tue, 18 Jan 2022 23:27:32 +0200
From:   Daniel Baluta <daniel.baluta@....nxp.com>
To:     pierre-louis.bossart@...ux.intel.com, lgirdwood@...il.com,
        broonie@...nel.org
Cc:     daniel.baluta@....com, kai.vehmanen@...ux.intel.com,
        ranjani.sridharan@...ux.intel.com,
        sound-open-firmware@...a-project.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, cezary.rojewski@...el.com,
        paul.olaru@....com
Subject: [PATCH v2 2/2] ASoC: SOF: compress: Implement get_caps and get_codec_caps

From: Paul Olaru <paul.olaru@....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@....com>
Signed-off-by: Daniel Baluta <daniel.baluta@....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;
+
+	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);
-- 
2.27.0