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[PATCH v9 08/12] virtio-sound: handle VIRTIO_SND_R_PCM_PREPARE
From: |
Emmanouil Pitsidianakis |
Subject: |
[PATCH v9 08/12] virtio-sound: handle VIRTIO_SND_R_PCM_PREPARE |
Date: |
Wed, 13 Sep 2023 10:33:15 +0300 |
Handles the PCM prepare control request. It initializes a PCM stream
when the guests asks for it.
Based-on:
https://github.com/OpenSynergy/qemu/commit/5a2f350eec5d157b90d9c7b40a8e603f4da92471
Signed-off-by: Igor Skalkin <Igor.Skalkin@opensynergy.com>
Signed-off-by: Anton Yakovlev <Anton.Yakovlev@opensynergy.com>
Signed-off-by: Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org>
---
hw/virtio/virtio-snd.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/hw/virtio/virtio-snd.c b/hw/virtio/virtio-snd.c
index 29a70cd7e8..343afc0531 100644
--- a/hw/virtio/virtio-snd.c
+++ b/hw/virtio/virtio-snd.c
@@ -452,6 +452,28 @@ static const char *print_code(uint32_t code)
#undef CASE
};
+/*
+ * Handles VIRTIO_SND_R_PCM_PREPARE.
+ *
+ * @s: VirtIOSound device
+ * @cmd: The request command queue element from VirtIOSound cmdq field
+ */
+static void virtio_snd_handle_pcm_prepare(VirtIOSound *s,
+ virtio_snd_ctrl_command *cmd)
+{
+ uint32_t stream_id;
+ size_t msg_sz = iov_to_buf(cmd->elem->out_sg,
+ cmd->elem->out_num,
+ sizeof(virtio_snd_hdr),
+ &stream_id,
+ sizeof(stream_id));
+
+ stream_id = le32_to_cpu(stream_id);
+ cmd->resp.code = msg_sz == sizeof(uint32_t)
+ ? virtio_snd_pcm_prepare(s, stream_id)
+ : cpu_to_le32(VIRTIO_SND_S_BAD_MSG);
+}
+
/*
* Handles VIRTIO_SND_R_PCM_START.
*
@@ -535,6 +557,8 @@ process_cmd(VirtIOSound *s, virtio_snd_ctrl_command *cmd)
virtio_snd_handle_pcm_set_params(s, cmd);
break;
case VIRTIO_SND_R_PCM_PREPARE:
+ virtio_snd_handle_pcm_prepare(s, cmd);
+ break;
case VIRTIO_SND_R_PCM_RELEASE:
cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_NOT_SUPP);
break;
--
2.39.2
- [PATCH v9 00/12] Add VIRTIO sound card, Emmanouil Pitsidianakis, 2023/09/13
- [PATCH v9 01/12] Add virtio-sound device stub, Emmanouil Pitsidianakis, 2023/09/13
- [PATCH v9 02/12] Add virtio-sound-pci device, Emmanouil Pitsidianakis, 2023/09/13
- [PATCH v9 03/12] virtio-sound: handle control messages and streams, Emmanouil Pitsidianakis, 2023/09/13
- [PATCH v9 04/12] virtio-sound: set PCM stream parameters, Emmanouil Pitsidianakis, 2023/09/13
- [PATCH v9 05/12] virtio-sound: handle VIRTIO_SND_R_PCM_INFO request, Emmanouil Pitsidianakis, 2023/09/13
- [PATCH v9 06/12] virtio-sound: handle VIRTIO_SND_R_PCM_{START,STOP}, Emmanouil Pitsidianakis, 2023/09/13
- [PATCH v9 07/12] virtio-sound: handle VIRTIO_SND_R_PCM_SET_PARAMS, Emmanouil Pitsidianakis, 2023/09/13
- [PATCH v9 08/12] virtio-sound: handle VIRTIO_SND_R_PCM_PREPARE,
Emmanouil Pitsidianakis <=
- [PATCH v9 09/12] virtio-sound: handle VIRTIO_SND_R_PCM_RELEASE, Emmanouil Pitsidianakis, 2023/09/13
- [PATCH v9 10/12] virtio-sound: implement audio output (TX), Emmanouil Pitsidianakis, 2023/09/13
- [PATCH v9 11/12] virtio-sound: implement audio capture (RX), Emmanouil Pitsidianakis, 2023/09/13
- [PATCH v9 12/12] docs/system: add basic virtio-snd documentation, Emmanouil Pitsidianakis, 2023/09/13
- Re: [PATCH v9 00/12] Add VIRTIO sound card, Stefano Garzarella, 2023/09/14