@@ -200,6 +200,132 @@ uint32_t virtio_snd_pcm_set_params_impl(VirtIOSound *s,
return VIRTIO_SND_S_OK;
}
+/*
+ * Get a QEMU Audiosystem compatible format value from a VIRTIO_SND_PCM_FMT_*
+ */
+static AudioFormat virtio_snd_get_qemu_format(uint32_t format)
+{
+ #define CASE(FMT) \
+ case VIRTIO_SND_PCM_FMT_##FMT: \
+ return AUDIO_FORMAT_##FMT;
+
+ switch (format) {
+ CASE(U8)
+ CASE(S8)
+ CASE(U16)
+ CASE(S16)
+ CASE(U32)
+ CASE(S32)
+ case VIRTIO_SND_PCM_FMT_FLOAT:
+ return AUDIO_FORMAT_F32;
+ default:
+ g_assert_not_reached();
+ }
+
+ #undef CASE
+}
+
+/*
+ * Get a QEMU Audiosystem compatible frequency value from a
+ * VIRTIO_SND_PCM_RATE_*
+ */
+static uint32_t virtio_snd_get_qemu_freq(uint32_t rate)
+{
+ #define CASE(RATE) \
+ case VIRTIO_SND_PCM_RATE_##RATE: \
+ return RATE;
+
+ switch (rate) {
+ CASE(5512)
+ CASE(8000)
+ CASE(11025)
+ CASE(16000)
+ CASE(22050)
+ CASE(32000)
+ CASE(44100)
+ CASE(48000)
+ CASE(64000)
+ CASE(88200)
+ CASE(96000)
+ CASE(176400)
+ CASE(192000)
+ CASE(384000)
+ default:
+ g_assert_not_reached();
+ }
+
+ #undef CASE
+}
+
+/*
+ * Get QEMU Audiosystem compatible audsettings from virtio based pcm stream
+ * params.
+ */
+static void virtio_snd_get_qemu_audsettings(audsettings *as,
+ VirtIOSoundPCMParams *params)
+{
+ as->nchannels = MIN(AUDIO_MAX_CHANNELS, params->channels);
+ as->fmt = virtio_snd_get_qemu_format(params->format);
+ as->freq = virtio_snd_get_qemu_freq(params->rate);
+ as->endianness = AUDIO_HOST_ENDIANNESS;
+}
+
+/*
+ * Prepares a VirtIOSound card stream.
+ * Returns the response status code. (VIRTIO_SND_S_*).
+ *
+ * @s: VirtIOSound device
+ * @stream_id: stream id
+ */
+static uint32_t virtio_snd_pcm_prepare_impl(VirtIOSound *s, uint32_t stream_id)
+{
+ audsettings as;
+ VirtIOSoundPCMParams *params;
+ VirtIOSoundPCMStream *stream;
+
+ if (!s->pcm->streams ||
+ !s->pcm->pcm_params ||
+ !s->pcm->pcm_params[stream_id]) {
+ return VIRTIO_SND_S_BAD_MSG;
+ }
+
+ params = virtio_snd_pcm_get_params(s, stream_id);
+ if (!params) {
+ return VIRTIO_SND_S_BAD_MSG;
+ }
+
+ virtio_snd_get_qemu_audsettings(&as, params);
+
+ stream = g_new0(VirtIOSoundPCMStream, 1);
+
+ stream->id = stream_id;
+ stream->pcm = s->pcm;
+ stream->direction = stream_id < s->snd_conf.streams / 2 +
+ (s->snd_conf.streams & 1) ? VIRTIO_SND_D_OUTPUT : VIRTIO_SND_D_INPUT;
+ stream->info.hdr.hda_fn_nid = VIRTIO_SOUND_HDA_FN_NID;
+ stream->features = 0;
+ stream->channels_min = 1;
+ stream->channels_max = as.nchannels;
+ stream->formats = supported_formats;
+ stream->rates = supported_rates;
+ stream->s = s;
+
+ stream->buffer_bytes = params->buffer_bytes;
+ stream->period_bytes = params->period_bytes;
+
+ stream->positions[0] = VIRTIO_SND_CHMAP_FL;
+ stream->positions[1] = VIRTIO_SND_CHMAP_FR;
+
+ stream->as = as;
+ stream->desired_as = stream->as;
+ qemu_mutex_init(&stream->queue_mutex);
+ QSIMPLEQ_INIT(&stream->queue);
+
+ s->pcm->streams[stream_id] = stream;
+
+ return VIRTIO_SND_S_OK;
+}
+
/*
* The actual processing done in virtio_snd_process_cmdq().
*
@@ -437,6 +563,13 @@ static void virtio_snd_common_realize(DeviceState *dev,
print_code(status));
return;
}
+ status = virtio_snd_pcm_prepare_impl(vsnd, i);
+ if (status != VIRTIO_SND_S_OK) {
+ error_setg(errp,
+ "Can't prepare streams, device responded with %s.",
+ print_code(status));
+ return;
+ }
}
}
After setting PCM parameters, instantiate ("prepare") each stream in virtio_snd_pcm_prepare_impl(). Signed-off-by: Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org> --- hw/virtio/virtio-snd.c | 133 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 133 insertions(+)