stream: work on pending buffers

src/internal.h

@@ -330,6 +330,7 @@ struct pa_stream {
 	struct pw_buffer *dequeued[MAX_BUFFERS];
 	struct spa_ringbuffer dequeued_ring;
 	size_t dequeued_size;
+	struct spa_list pending;
 
 	struct pw_buffer *buffer;
 	uint32_t buffer_index;

src/stream.c

@@ -25,10 +25,22 @@
 
 #include <pulse/stream.h>
 #include <pulse/timeval.h>
+#include <pulse/xmalloc.h>
 
 #include <pipewire/stream.h>
 #include "internal.h"
 
+struct pending_data {
+	struct spa_list link;
+
+	const void *data;
+	size_t nbytes;
+	size_t offset;
+
+	pa_free_cb_t free_cb;
+	void *free_cb_data;
+};
+
 static const uint32_t audio_formats[] = {
 	[PA_SAMPLE_U8] = offsetof(struct spa_type_audio_format, U8),
 	[PA_SAMPLE_ALAW] = offsetof(struct spa_type_audio_format, UNKNOWN),
@@ -313,6 +325,7 @@ pa_stream* stream_new(pa_context *c, const char *name,
 	s->refcount = 1;
 	s->context = c;
 	init_type(&s->type, pw_core_get_type(c->core)->map);
+	spa_list_init(&s->pending);
 
 	pw_stream_add_listener(s->stream, &s->stream_listener, &stream_events, s);
 
@@ -760,6 +773,41 @@ int pa_stream_cancel_write(pa_stream *s)
 	return 0;
 }
 
+static void flush_pending(pa_stream  *s)
+{
+	struct pending_data *p;
+	void *data;
+	size_t nbytes;
+	bool flush;
+
+	while(!spa_list_is_empty(&s->pending)) {
+		p = spa_list_first(&s->pending, struct pending_data, link);
+
+		pa_stream_begin_write(s, &data, &nbytes);
+		if (data == NULL || nbytes == 0)
+			break;
+
+		nbytes = SPA_MIN(nbytes, p->nbytes - p->offset);
+		memcpy(data, p->data + p->offset, nbytes);
+
+		p->offset += nbytes;
+		s->buffer_offset += nbytes;
+
+		flush = p->offset >= p->nbytes;
+
+		if (flush) {
+			spa_list_remove(&p->link);
+			if (p->free_cb)
+				p->free_cb(p->free_cb_data);
+			pa_xfree(p);
+		}
+		if (flush || s->buffer_offset >= s->buffer_size) {
+			s->buffer->buffer->datas[0].chunk->size = s->buffer_offset;
+			queue_buffer(s);
+		}
+	}
+}
+
 int pa_stream_write(pa_stream *s,
         const void *data,
         size_t nbytes,
@@ -778,8 +826,6 @@ int pa_stream_write_ext_free(pa_stream *s,
         int64_t offset,
         pa_seek_mode_t seek)
 {
-	int res;
-
 	spa_assert(s);
 	spa_assert(s->refcount >= 1);
 	spa_assert(data);
@@ -800,25 +846,23 @@ int pa_stream_write_ext_free(pa_stream *s,
 	PA_CHECK_VALIDITY(s->context, !free_cb || !s->buffer, PA_ERR_INVALID);
 
 	if (s->buffer == NULL) {
-		void *dst;
-		size_t dlen;
+		struct pending_data *p;
 
-		if ((res = pa_stream_begin_write(s, &dst, &dlen)) < 0)
-			return res;
+		p = pa_xmalloc(sizeof(struct pending_data));
+		p->data = data;
+		p->nbytes = nbytes;
+		p->offset = 0;
+		p->free_cb = free_cb;
+		p->free_cb_data = free_cb_data;
+		spa_list_append(&s->pending, &p->link);
 
-		if (dst == NULL || dlen == 0)
-			return 0;
-
-		nbytes = SPA_MIN(nbytes, dlen);
-		memcpy(dst, data, nbytes);
-		data = dst;
-
-		if (free_cb)
-			free_cb(free_cb_data);
+		flush_pending(s);
+	}
+	else {
+		s->buffer->buffer->datas[0].chunk->offset = data - s->buffer_data;
+		s->buffer->buffer->datas[0].chunk->size = nbytes;
+		queue_buffer(s);
 	}
-
-	s->buffer->buffer->datas[0].chunk->offset = data - s->buffer_data;
-	s->buffer->buffer->datas[0].chunk->size = nbytes;
 
 	/* Update the write index in the already available latency data */
 	if (s->timing_info_valid) {
@@ -831,8 +875,6 @@ int pa_stream_write_ext_free(pa_stream *s,
 		} else
 			s->timing_info.write_index_corrupt = true;
         }
-	queue_buffer(s);
-
 	return 0;
 }
 
@@ -1116,7 +1158,7 @@ pa_operation* pa_stream_cork(pa_stream *s, int b, pa_stream_success_cb_t cb, voi
 
 	s->corked = b;
 
-	pw_log_warn("Not Implemented");
+	pw_log_warn("Not Implemented %d", b);
 	o = pa_operation_new(s->context, s, on_success, sizeof(struct success_ack));
 	d = o->userdata;
 	d->cb = cb;