[03/10] hw/audio/virtio-sound: split out virtio_snd_pcm_start_stop()

Split out virtio_snd_pcm_start_stop(). This is a preparation
for the next patch so that it doesn't become too big.

Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
---
 hw/audio/trace-events |  3 ++-
 hw/audio/virtio-snd.c | 57 ++++++++++++++++++++++++++++---------------
 2 files changed, 39 insertions(+), 21 deletions(-)

On Fri, Jan 5, 2024 at 12:34 AM Volker Rümelin <vr_qemu@t-online.de> wrote:
>
> Split out virtio_snd_pcm_start_stop(). This is a preparation
> for the next patch so that it doesn't become too big.
>
> Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

> ---
>  hw/audio/trace-events |  3 ++-
>  hw/audio/virtio-snd.c | 57 ++++++++++++++++++++++++++++---------------
>  2 files changed, 39 insertions(+), 21 deletions(-)
>
> diff --git a/hw/audio/trace-events b/hw/audio/trace-events
> index b1870ff224..7554bfcc60 100644
> --- a/hw/audio/trace-events
> +++ b/hw/audio/trace-events
> @@ -50,7 +50,8 @@ virtio_snd_unrealize(void *snd) "snd %p: unrealize"
>  virtio_snd_handle_pcm_set_params(uint32_t stream) "VIRTIO_SND_PCM_SET_PARAMS called for stream %"PRIu32
>  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_pcm_start(uint32_t stream) "VIRTIO_SND_R_PCM_START called for stream %"PRIu32
> +virtio_snd_handle_pcm_stop(uint32_t stream) "VIRTIO_SND_R_PCM_STOP called for stream %"PRIu32
>  virtio_snd_handle_pcm_release(uint32_t stream) "VIRTIO_SND_PCM_RELEASE 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"
> diff --git a/hw/audio/virtio-snd.c b/hw/audio/virtio-snd.c
> index 36b1bb502c..040bc32ebe 100644
> --- a/hw/audio/virtio-snd.c
> +++ b/hw/audio/virtio-snd.c
> @@ -534,7 +534,42 @@ static void virtio_snd_handle_pcm_prepare(VirtIOSound *s,
>  }
>
>  /*
> - * Handles VIRTIO_SND_R_PCM_START.
> + * Starts/Stops a VirtIOSound card stream.
> + * Returns the response status code. (VIRTIO_SND_S_*).
> + *
> + * @s: VirtIOSound device
> + * @stream_id: stream id
> + * @start: whether to start or stop the stream
> + */
> +static uint32_t virtio_snd_pcm_start_stop(VirtIOSound *s,
> +                                          uint32_t stream_id,
> +                                          bool start)
> +{
> +    VirtIOSoundPCMStream *stream;
> +
> +    stream = virtio_snd_pcm_get_stream(s, stream_id);
> +    if (!stream) {
> +        return cpu_to_le32(VIRTIO_SND_S_BAD_MSG);
> +    }
> +
> +    if (start) {
> +        trace_virtio_snd_handle_pcm_start(stream_id);
> +    } else {
> +        trace_virtio_snd_handle_pcm_stop(stream_id);
> +    }
> +
> +    stream->active = start;
> +    if (stream->info.direction == VIRTIO_SND_D_OUTPUT) {
> +        AUD_set_active_out(stream->voice.out, start);
> +    } else {
> +        AUD_set_active_in(stream->voice.in, start);
> +    }
> +
> +    return cpu_to_le32(VIRTIO_SND_S_OK);
> +}
> +
> +/*
> + * Handles VIRTIO_SND_R_PCM_START and VIRTIO_SND_R_PCM_STOP.
>   *
>   * @s: VirtIOSound device
>   * @cmd: The request command queue element from VirtIOSound cmdq field
> @@ -544,7 +579,6 @@ 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,
> @@ -562,24 +596,7 @@ static void virtio_snd_handle_pcm_start_stop(VirtIOSound *s,
>      }
>
>      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) {
> -        stream->active = start;
> -        if (stream->info.direction == VIRTIO_SND_D_OUTPUT) {
> -            AUD_set_active_out(stream->voice.out, start);
> -        } else {
> -            AUD_set_active_in(stream->voice.in, start);
> -        }
> -    } else {
> -        error_report("Invalid stream id: %"PRIu32, stream_id);
> -        cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_BAD_MSG);
> -        return;
> -    }
> -    stream->active = start;
> +    cmd->resp.code = virtio_snd_pcm_start_stop(s, stream_id, start);
>  }
>
>  /*
> --
> 2.35.3
>