[PATCH v2 13/18] sink-input, source-output: Add support for nodes

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On 06/28/2013 09:48 AM, Tanu Kaskinen wrote:
> ---
>   src/pulsecore/sink-input.c    | 45 +++++++++++++++++++++++++++++++++++++++++--
>   src/pulsecore/sink-input.h    |  6 ++++++
>   src/pulsecore/source-output.c | 42 +++++++++++++++++++++++++++++++++++++++-
>   src/pulsecore/source-output.h |  6 ++++++
>   4 files changed, 96 insertions(+), 3 deletions(-)
>
> diff --git a/src/pulsecore/sink-input.c b/src/pulsecore/sink-input.c
> index 4863f15..a79aa4e 100644
> --- a/src/pulsecore/sink-input.c
> +++ b/src/pulsecore/sink-input.c
> @@ -109,9 +109,11 @@ pa_sink_input_new_data* pa_sink_input_new_data_init(pa_sink_input_new_data *data
>       data->resample_method = PA_RESAMPLER_INVALID;
>       data->proplist = pa_proplist_new();
>       data->volume_writable = TRUE;
> -
>       data->volume_factor_items = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
>       data->volume_factor_sink_items = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
> +    pa_node_new_data_init(&data->node_data);
> +    pa_node_new_data_set_type(&data->node_data, PA_NODE_TYPE_SINK_INPUT);
> +    pa_node_new_data_set_direction(&data->node_data, PA_DIRECTION_INPUT);
>
>       return data;
>   }
> @@ -229,9 +231,17 @@ pa_bool_t pa_sink_input_new_data_set_formats(pa_sink_input_new_data *data, pa_id
>       return TRUE;
>   }
>
> +void pa_sink_input_new_data_set_create_node(pa_sink_input_new_data *data, bool create) {
> +    pa_assert(data);
> +
> +    data->create_node = create;
> +}

I tried to think of a use case where sink inputs would not have nodes, 
but failed (but I'm not sure how this would work with virtual sinks).

If not, is there a reason to have this - can't we just always create the 
node?

> +
>   void pa_sink_input_new_data_done(pa_sink_input_new_data *data) {
>       pa_assert(data);
>
> +    pa_node_new_data_done(&data->node_data);
> +
>       if (data->req_formats)
>           pa_idxset_free(data->req_formats, (pa_free_cb_t) pa_format_info_free);
>
> @@ -282,7 +292,7 @@ int pa_sink_input_new(
>           pa_core *core,
>           pa_sink_input_new_data *data) {
>
> -    pa_sink_input *i;
> +    pa_sink_input *i = NULL;
>       pa_resampler *resampler = NULL;
>       char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX], fmt[PA_FORMAT_INFO_SNPRINT_MAX];
>       pa_channel_map original_cm;
> @@ -291,6 +301,7 @@ int pa_sink_input_new(
>       char *memblockq_name;
>       pa_sample_spec ss;
>       pa_channel_map map;
> +    int ret = 0;
>
>       pa_assert(_i);
>       pa_assert(core);
> @@ -580,6 +591,19 @@ int pa_sink_input_new(
>               &i->sink->silence);
>       pa_xfree(memblockq_name);
>
> +    if (data->create_node) {
> +        if (!data->node_data.description)
> +            pa_node_new_data_set_description(&data->node_data, pa_sink_input_get_description(i));
> +
> +        if (!(i->node = pa_node_new(i->core, &data->node_data))) {
> +            pa_log("Failed to create a node for sink input \"%s\".", pa_sink_input_get_description(i));
> +            ret = -PA_ERR_INTERNAL;
> +            goto fail;
> +        }
> +
> +        i->node->owner = i;
> +    }
> +
>       pt = pa_proplist_to_string_sep(i->proplist, "\n    ");
>       pa_log_info("Created input %u \"%s\" on %s with sample spec %s and channel map %s\n    %s",
>                   i->index,
> @@ -594,6 +618,14 @@ int pa_sink_input_new(
>
>       *_i = i;
>       return 0;
> +
> +fail:
> +    if (i) {
> +        pa_sink_input_unlink(i);
> +        pa_sink_input_unref(i);
> +    }
> +
> +    return ret;
>   }
>
>   /* Called from main context */
> @@ -677,6 +709,9 @@ void pa_sink_input_unlink(pa_sink_input *i) {
>       if (linked)
>           pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_UNLINK], i);
>
> +    if (i->node)
> +        pa_node_unlink(i->node);
> +
>       if (i->sync_prev)
>           i->sync_prev->sync_next = i->sync_next;
>       if (i->sync_next)
> @@ -751,6 +786,9 @@ static void sink_input_free(pa_object *o) {
>        * "half-moved" or are connected to sinks that have no asyncmsgq
>        * and are hence half-destructed themselves! */
>
> +    if (i->node)
> +        pa_node_free(i->node);
> +
>       if (i->thread_info.render_memblockq)
>           pa_memblockq_free(i->thread_info.render_memblockq);
>
> @@ -818,6 +856,9 @@ void pa_sink_input_put(pa_sink_input *i) {
>
>       pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_ADD_INPUT, i, 0, NULL) == 0);
>
> +    if (i->node)
> +        pa_node_put(i->node);
> +
>       pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, i->index);
>       pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], i);
>
> diff --git a/src/pulsecore/sink-input.h b/src/pulsecore/sink-input.h
> index bece745..7c11452 100644
> --- a/src/pulsecore/sink-input.h
> +++ b/src/pulsecore/sink-input.h
> @@ -70,6 +70,8 @@ struct pa_sink_input {
>       uint32_t index;
>       pa_core *core;
>
> +    pa_node *node;
> +
>       /* Please note that this state should only be read with
>        * pa_sink_input_get_state(). That function will transparently
>        * merge the thread_info.drained value in. */
> @@ -314,6 +316,9 @@ typedef struct pa_sink_input_new_data {
>       pa_bool_t volume_writable:1;
>
>       pa_bool_t save_sink:1, save_volume:1, save_muted:1;
> +
> +    bool create_node;
> +    pa_node_new_data node_data;
>   } pa_sink_input_new_data;
>
>   pa_sink_input_new_data* pa_sink_input_new_data_init(pa_sink_input_new_data *data);
> @@ -326,6 +331,7 @@ void pa_sink_input_new_data_add_volume_factor_sink(pa_sink_input_new_data *data,
>   void pa_sink_input_new_data_set_muted(pa_sink_input_new_data *data, pa_bool_t mute);
>   pa_bool_t pa_sink_input_new_data_set_sink(pa_sink_input_new_data *data, pa_sink *s, pa_bool_t save);
>   pa_bool_t pa_sink_input_new_data_set_formats(pa_sink_input_new_data *data, pa_idxset *formats);
> +void pa_sink_input_new_data_set_create_node(pa_sink_input_new_data *data, bool create);
>   void pa_sink_input_new_data_done(pa_sink_input_new_data *data);
>
>   /* To be called by the implementing module only */
> diff --git a/src/pulsecore/source-output.c b/src/pulsecore/source-output.c
> index 75f02ff..127ef52 100644
> --- a/src/pulsecore/source-output.c
> +++ b/src/pulsecore/source-output.c
> @@ -55,6 +55,9 @@ pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_d
>       data->resample_method = PA_RESAMPLER_INVALID;
>       data->proplist = pa_proplist_new();
>       data->volume_writable = TRUE;
> +    pa_node_new_data_init(&data->node_data);
> +    pa_node_new_data_set_type(&data->node_data, PA_NODE_TYPE_SOURCE_OUTPUT);
> +    pa_node_new_data_set_direction(&data->node_data, PA_DIRECTION_OUTPUT);
>
>       return data;
>   }
> @@ -174,9 +177,17 @@ pa_bool_t pa_source_output_new_data_set_formats(pa_source_output_new_data *data,
>       return TRUE;
>   }
>
> +void pa_source_output_new_data_set_create_node(pa_source_output_new_data *data, bool create) {
> +    pa_assert(data);
> +
> +    data->create_node = create;
> +}
> +
>   void pa_source_output_new_data_done(pa_source_output_new_data *data) {
>       pa_assert(data);
>
> +    pa_node_new_data_done(&data->node_data);
> +
>       if (data->req_formats)
>           pa_idxset_free(data->req_formats, (pa_free_cb_t) pa_format_info_free);
>
> @@ -219,7 +230,7 @@ int pa_source_output_new(
>           pa_core *core,
>           pa_source_output_new_data *data) {
>
> -    pa_source_output *o;
> +    pa_source_output *o = NULL;
>       pa_resampler *resampler = NULL;
>       char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
>       pa_channel_map original_cm;
> @@ -227,6 +238,7 @@ int pa_source_output_new(
>       char *pt;
>       pa_sample_spec ss;
>       pa_channel_map map;
> +    int ret = 0;
>
>       pa_assert(_o);
>       pa_assert(core);
> @@ -489,6 +501,17 @@ int pa_source_output_new(
>       if (o->direct_on_input)
>           pa_assert_se(pa_idxset_put(o->direct_on_input->direct_outputs, o, NULL) == 0);
>
> +    if (data->create_node) {
> +        if (!data->node_data.description)
> +            pa_node_new_data_set_description(&data->node_data, pa_source_output_get_description(o));
> +
> +        if (!(o->node = pa_node_new(o->core, &data->node_data))) {
> +            pa_log("Failed to create a node for source output \"%s\".", pa_source_output_get_description(o));
> +            ret = -PA_ERR_INTERNAL;
> +            goto fail;
> +        }
> +    }
> +
>       pt = pa_proplist_to_string_sep(o->proplist, "\n    ");
>       pa_log_info("Created output %u \"%s\" on %s with sample spec %s and channel map %s\n    %s",
>                   o->index,
> @@ -503,6 +526,14 @@ int pa_source_output_new(
>
>       *_o = o;
>       return 0;
> +
> +fail:
> +    if (o) {
> +        pa_source_output_unlink(o);
> +        pa_source_output_unref(o);
> +    }
> +
> +    return ret;
>   }
>
>   /* Called from main context */
> @@ -566,6 +597,9 @@ void pa_source_output_unlink(pa_source_output*o) {
>       if (linked)
>           pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK], o);
>
> +    if (o->node)
> +        pa_node_unlink(o->node);
> +
>       if (o->direct_on_input)
>           pa_idxset_remove_by_data(o->direct_on_input->direct_outputs, o, NULL);
>
> @@ -625,6 +659,9 @@ static void source_output_free(pa_object* mo) {
>
>       pa_log_info("Freeing output %u \"%s\"", o->index, pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)));
>
> +    if (o->node)
> +        pa_node_free(o->node);
> +
>       if (o->thread_info.delay_memblockq)
>           pa_memblockq_free(o->thread_info.delay_memblockq);
>
> @@ -679,6 +716,9 @@ void pa_source_output_put(pa_source_output *o) {
>
>       pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
>
> +    if (o->node)
> +        pa_node_put(o->node);
> +
>       pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
>       pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], o);
>
> diff --git a/src/pulsecore/source-output.h b/src/pulsecore/source-output.h
> index fd95c3e..e4e093d 100644
> --- a/src/pulsecore/source-output.h
> +++ b/src/pulsecore/source-output.h
> @@ -68,6 +68,8 @@ struct pa_source_output {
>       uint32_t index;
>       pa_core *core;
>
> +    pa_node *node;
> +
>       pa_source_output_state_t state;
>       pa_source_output_flags_t flags;
>
> @@ -270,6 +272,9 @@ typedef struct pa_source_output_new_data {
>       pa_bool_t volume_writable:1;
>
>       pa_bool_t save_source:1, save_volume:1, save_muted:1;
> +
> +    bool create_node;
> +    pa_node_new_data node_data;
>   } pa_source_output_new_data;
>
>   pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data);
> @@ -282,6 +287,7 @@ void pa_source_output_new_data_apply_volume_factor_source(pa_source_output_new_d
>   void pa_source_output_new_data_set_muted(pa_source_output_new_data *data, pa_bool_t mute);
>   pa_bool_t pa_source_output_new_data_set_source(pa_source_output_new_data *data, pa_source *s, pa_bool_t save);
>   pa_bool_t pa_source_output_new_data_set_formats(pa_source_output_new_data *data, pa_idxset *formats);
> +void pa_source_output_new_data_set_create_node(pa_source_output_new_data *data, bool create);
>   void pa_source_output_new_data_done(pa_source_output_new_data *data);
>
>   /* To be called by the implementing module only */
>



-- 
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic


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