[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[RFC PATCH 19/25] virtio-snd: Add start/stop handler
From: |
Shreyansh Chouhan |
Subject: |
[RFC PATCH 19/25] virtio-snd: Add start/stop handler |
Date: |
Sat, 12 Feb 2022 03:43:13 +0530 |
Added handlers for VIRTIO_SND_PCM_START and VIRTIO_SND_PCM_STOP.
Signed-off-by: Shreyansh Chouhan <chouhan.shreyansh2702@gmail.com>
---
hw/audio/virtio-snd.c | 35 +++++++++++++++++++++++++++++++++--
1 file changed, 33 insertions(+), 2 deletions(-)
diff --git a/hw/audio/virtio-snd.c b/hw/audio/virtio-snd.c
index b74c9e4a1f..1b3e1f75f4 100644
--- a/hw/audio/virtio-snd.c
+++ b/hw/audio/virtio-snd.c
@@ -828,6 +828,36 @@ static uint32_t virtio_snd_handle_pcm_prepare(VirtIOSound
*s,
return sz;
}
+/*
+ * Handles VIRTIO_SND_R_PCM_START.
+ * The function writes the response to the virtqueue element.
+ * Returns the used size in bytes.
+ *
+ * @s: VirtIOSound card
+ * @elem: The request element from control queue
+ */
+static uint32_t virtio_snd_handle_pcm_start_stop(VirtIOSound *s,
+ VirtQueueElement *elem,
+ bool start)
+{
+ virtio_snd_pcm_hdr req;
+ size_t sz;
+
+ sz = iov_to_buf(elem->out_sg, elem->out_num, 0, &req, sizeof(req));
+ assert(sz == sizeof(virtio_snd_pcm_hdr));
+
+ virtio_snd_hdr resp;
+ resp.code = VIRTIO_SND_S_OK;
+
+ virtio_snd_pcm_stream *st = virtio_snd_pcm_get_stream(s, req.stream_id);
+ if (st->direction == VIRTIO_SND_D_OUTPUT)
+ AUD_set_active_out(st->voice.out, start);
+
+ sz = iov_from_buf(elem->in_sg, elem->in_num, 0, &resp, sizeof(resp));
+ assert(sz == sizeof(virtio_snd_hdr));
+ return sz;
+}
+
/* The control queue handler. Pops an element from the control virtqueue,
* checks the header and performs the requested action. Finally marks the
* element as used.
@@ -882,9 +912,10 @@ static void virtio_snd_handle_ctrl(VirtIODevice *vdev,
VirtQueue *vq)
sz = virtio_snd_handle_pcm_prepare(s, elem);
goto done;
} else if (ctrl.code == VIRTIO_SND_R_PCM_START) {
- virtio_snd_log("VIRTIO_SND_R_PCM_START");
+ sz = virtio_snd_handle_pcm_start_stop(s, elem, true);
+ goto done;
} else if (ctrl.code == VIRTIO_SND_R_PCM_STOP) {
- virtio_snd_log("VIRTIO_SND_R_PCM_STOP");
+ sz = virtio_snd_handle_pcm_start_stop(s, elem, false);
} else if (ctrl.code == VIRTIO_SND_R_PCM_RELEASE) {
virtio_snd_log("VIRTIO_SND_R_PCM_RELEASE");
} else if (ctrl.code == VIRTIO_SND_R_CHMAP_INFO) {
--
2.31.1
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- [RFC PATCH 19/25] virtio-snd: Add start/stop handler,
Shreyansh Chouhan <=