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Fighting rewinds: Seek and write data in the same message

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Allow a message in the queue to perform both a seek and a post data.
For clients that do not use PA_SEEK_RELATIVE (e g gstreamer), this
cuts the message count - and sometimes even the rewinds - in half.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
This commit is contained in:
David Henningsson 2010-12-06 16:25:25 +01:00 • committed by Colin Guthrie
parent 1250b5d735
commit fe7b972487
1 changed files with 12 additions and 8 deletions
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16
src/pulsecore/protocol-native.c
View file

@ -1352,6 +1352,7 @@ static void flush_write_no_account(pa_memblockq *q) {
static int sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
pa_sink_input *i = PA_SINK_INPUT(o);
playback_stream *s;
int64_t windex_seek = 0;
pa_sink_input_assert_ref(i);
s = PLAYBACK_STREAM(i->userdata);
@ -1360,19 +1361,20 @@ static int sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int
switch (code) {
case SINK_INPUT_MESSAGE_SEEK: {
int64_t windex;
windex = pa_memblockq_get_write_index(s->memblockq);
windex_seek = pa_memblockq_get_write_index(s->memblockq);
/* The client side is incapable of accounting correctly
* for seeks of a type != PA_SEEK_RELATIVE. We need to be
* able to deal with that. */
pa_memblockq_seek(s->memblockq, offset, PA_PTR_TO_UINT(userdata), PA_PTR_TO_UINT(userdata) == PA_SEEK_RELATIVE);
handle_seek(s, windex);
if (!chunk) {
handle_seek(s, windex_seek);
return 0;
}
/* else fall through and write some data */
}
case SINK_INPUT_MESSAGE_POST_DATA: {
int64_t windex;
@ -1380,6 +1382,8 @@ static int sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int
pa_assert(chunk);
windex = pa_memblockq_get_write_index(s->memblockq);
if (code == SINK_INPUT_MESSAGE_SEEK)
windex = PA_MIN(windex, windex_seek);
/* pa_log("sink input post: %lu %lli", (unsigned long) chunk->length, (long long) windex); */
@ -4466,8 +4470,8 @@ static void pstream_memblock_callback(pa_pstream *p, uint32_t channel, int64_t o
if (chunk->memblock) {
if (seek != PA_SEEK_RELATIVE || offset != 0)
pa_asyncmsgq_post(ps->sink_input->sink->asyncmsgq, PA_MSGOBJECT(ps->sink_input), SINK_INPUT_MESSAGE_SEEK, PA_UINT_TO_PTR(seek), offset, NULL, NULL);
pa_asyncmsgq_post(ps->sink_input->sink->asyncmsgq, PA_MSGOBJECT(ps->sink_input), SINK_INPUT_MESSAGE_SEEK, PA_UINT_TO_PTR(seek), offset, chunk, NULL);
else
pa_asyncmsgq_post(ps->sink_input->sink->asyncmsgq, PA_MSGOBJECT(ps->sink_input), SINK_INPUT_MESSAGE_POST_DATA, NULL, 0, chunk, NULL);
} else
pa_asyncmsgq_post(ps->sink_input->sink->asyncmsgq, PA_MSGOBJECT(ps->sink_input), SINK_INPUT_MESSAGE_SEEK, PA_UINT_TO_PTR(seek), offset+chunk->length, NULL, NULL);