Handle the start and stop control messages for a stream_id. This request does nothing at the moment except for replying to it. Audio playback or capture will be started/stopped here in follow-up commits.
Based-on: https://github.com/OpenSynergy/qemu/commit/5a2f350eec5d157b90d9c7b40a8e603f4da92471 Signed-off-by: Igor Skalkin <igor.skal...@opensynergy.com> Signed-off-by: Anton Yakovlev <anton.yakov...@opensynergy.com> Signed-off-by: Emmanouil Pitsidianakis <manos.pitsidiana...@linaro.org> --- hw/virtio/trace-events | 1 + hw/virtio/virtio-snd.c | 44 ++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 43 insertions(+), 2 deletions(-) diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events index 3e619f778b..8eae1bf881 100644 --- a/hw/virtio/trace-events +++ b/hw/virtio/trace-events @@ -165,6 +165,7 @@ virtio_snd_realize(void *snd) "snd %p: realize" virtio_snd_unrealize(void *snd) "snd %p: unrealize" virtio_snd_handle_ctrl(void *vdev, void *vq) "snd %p: handle ctrl event for queue %p" virtio_snd_handle_pcm_info(uint32_t stream) "VIRTIO_SND_R_PCM_INFO called for stream %"PRIu32 +virtio_snd_handle_pcm_start_stop(const char *code, uint32_t stream) "%s called for stream %"PRIu32 virtio_snd_handle_code(uint32_t val, const char *code) "ctrl code msg val = %"PRIu32" == %s" virtio_snd_handle_chmap_info(void) "VIRTIO_SND_CHMAP_INFO called" virtio_snd_handle_event(void) "event queue callback called" diff --git a/hw/virtio/virtio-snd.c b/hw/virtio/virtio-snd.c index fd7c3ff000..8b23a39499 100644 --- a/hw/virtio/virtio-snd.c +++ b/hw/virtio/virtio-snd.c @@ -426,6 +426,42 @@ static const char *print_code(uint32_t code) #undef CASE }; +/* + * Handles VIRTIO_SND_R_PCM_START. + * + * @s: VirtIOSound device + * @cmd: The request command queue element from VirtIOSound cmdq field + * @start: whether to start or stop the device + */ +static void virtio_snd_handle_pcm_start_stop(VirtIOSound *s, + virtio_snd_ctrl_command *cmd, + bool start) +{ + VirtIOSoundPCMStream *stream; + virtio_snd_pcm_hdr req; + uint32_t stream_id; + size_t msg_sz = iov_to_buf(cmd->elem->out_sg, + cmd->elem->out_num, + 0, + &req, + sizeof(req)); + + if (msg_sz != sizeof(virtio_snd_pcm_hdr)) { + cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_BAD_MSG); + return; + } + + stream_id = le32_to_cpu(req.stream_id); + cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_OK); + trace_virtio_snd_handle_pcm_start_stop(start ? "VIRTIO_SND_R_PCM_START" : + "VIRTIO_SND_R_PCM_STOP", stream_id); + stream = virtio_snd_pcm_get_stream(s, stream_id); + if (!stream) { + error_report("Invalid stream id: %"PRIu32, req.stream_id); + cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_BAD_MSG); + } +} + /* * The actual processing done in virtio_snd_process_cmdq(). * @@ -463,10 +499,14 @@ process_cmd(VirtIOSound *s, virtio_snd_ctrl_command *cmd) case VIRTIO_SND_R_PCM_INFO: virtio_snd_handle_pcm_info(s, cmd); break; - case VIRTIO_SND_R_PCM_SET_PARAMS: - case VIRTIO_SND_R_PCM_PREPARE: case VIRTIO_SND_R_PCM_START: + virtio_snd_handle_pcm_start_stop(s, cmd, true); + break; case VIRTIO_SND_R_PCM_STOP: + virtio_snd_handle_pcm_start_stop(s, cmd, false); + break; + case VIRTIO_SND_R_PCM_SET_PARAMS: + case VIRTIO_SND_R_PCM_PREPARE: case VIRTIO_SND_R_PCM_RELEASE: cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_NOT_SUPP); break; -- 2.39.2