return usec;
}
+static pa_usec_t time_counter_diff(struct pa_stream *s, pa_usec_t t, pa_usec_t c, int *negative) {
+ assert(s);
+
+ if (negative)
+ *negative = 0;
+
+ if (c < t) {
+ if (s->direction == PA_STREAM_RECORD) {
+ if (negative)
+ *negative = 1;
+
+ return t-c;
+ } else
+ return 0;
+ } else
+ return c-t;
+}
+
pa_usec_t pa_stream_get_latency(struct pa_stream *s, const struct pa_latency_info *i, int *negative) {
pa_usec_t t, c;
assert(s && i);
t = pa_stream_get_time(s, i);
c = pa_bytes_to_usec(s->counter, &s->sample_spec);
- if (t <= c) {
- if (negative)
- *negative = 1;
-
- return c-t;
- } else {
- if (negative)
- *negative = 0;
- return t-c;
- }
-
- return 0;
+ return time_counter_diff(s, t, c, negative);
}
const struct pa_sample_spec* pa_stream_get_sample_spec(struct pa_stream *s) {
t = pa_stream_get_interpolated_time(s);
c = pa_bytes_to_usec(s->counter, &s->sample_spec);
-
- if (t <= c) {
- if (negative)
- *negative = 1;
-
- return c-t;
- } else {
- if (negative)
- *negative = 0;
- return t-c;
- }
+
+ return time_counter_diff(s, t, c, negative);
}
i->kill = NULL;
i->get_latency = NULL;
i->userdata = NULL;
+ i->underrun = NULL;
i->volume = PA_VOLUME_NORM;
+ i->playing = 0;
i->resampled_chunk.memblock = NULL;
i->resampled_chunk.index = i->resampled_chunk.length = 0;
}
int pa_sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
- int ret = 0;
+ int ret = -1;
assert(i && chunk && i->ref >= 1);
- if (!i->peek || !i->drop)
- return -1;
-
- if (i->state == PA_SINK_INPUT_CORKED)
- return -1;
-
- if (!i->resampler)
- return i->peek(i, chunk);
-
pa_sink_input_ref(i);
+ if (!i->peek || !i->drop || i->state == PA_SINK_INPUT_CORKED)
+ goto finish;
+
+ if (!i->resampler) {
+ ret = i->peek(i, chunk);
+ goto finish;
+ }
+
while (!i->resampled_chunk.memblock) {
struct pa_memchunk tchunk;
size_t l;
finish:
+ if (ret < 0 && i->playing && i->underrun)
+ i->underrun(i);
+
+ i->playing = ret >= 0;
+
pa_sink_input_unref(i);
return ret;
void (*drop) (struct pa_sink_input *i, const struct pa_memchunk *chunk, size_t length);
void (*kill) (struct pa_sink_input *i);
pa_usec_t (*get_latency) (struct pa_sink_input *i);
+ void (*underrun) (struct pa_sink_input *i);
void *userdata;
+ int playing;
+
struct pa_memchunk resampled_chunk;
struct pa_resampler *resampler;
};