/* Called from output thread context */
static int sink_input_process_msg_cb(pa_msgobject *obj, int code, void *data, int64_t offset, pa_memchunk *chunk) {
    struct userdata *u = PA_SINK_INPUT(obj)->userdata;

    switch (code) {

        case PA_SINK_INPUT_MESSAGE_GET_LATENCY: {
            pa_usec_t *r = data;

            pa_sink_input_assert_io_context(u->sink_input);

            *r = pa_bytes_to_usec(pa_memblockq_get_length(u->memblockq), &u->sink_input->sample_spec);

            /* Fall through, the default handler will add in the extra
             * latency added by the resampler */
            break;
        }

        case SINK_INPUT_MESSAGE_POST:

            pa_sink_input_assert_io_context(u->sink_input);

            if (PA_SINK_IS_OPENED(u->sink_input->sink->thread_info.state))
                pa_memblockq_push_align(u->memblockq, chunk);
            else
                pa_memblockq_flush_write(u->memblockq, TRUE);

            update_min_memblockq_length(u);

            /* Is this the end of an underrun? Then let's start things
             * right-away */
            if (!u->in_pop &&
                u->sink_input->thread_info.underrun_for > 0 &&
                pa_memblockq_is_readable(u->memblockq)) {

                pa_log_debug("Requesting rewind due to end of underrun.");
                pa_sink_input_request_rewind(u->sink_input,
                                             (size_t) (u->sink_input->thread_info.underrun_for == (size_t) -1 ? 0 : u->sink_input->thread_info.underrun_for),
                                             FALSE, TRUE, FALSE);
            }

            u->recv_counter += (int64_t) chunk->length;

            return 0;

        case SINK_INPUT_MESSAGE_REWIND:

            pa_sink_input_assert_io_context(u->sink_input);

            if (PA_SINK_IS_OPENED(u->sink_input->sink->thread_info.state))
                pa_memblockq_seek(u->memblockq, -offset, PA_SEEK_RELATIVE, TRUE);
            else
                pa_memblockq_flush_write(u->memblockq, TRUE);

            u->recv_counter -= offset;

            update_min_memblockq_length(u);

            return 0;

        case SINK_INPUT_MESSAGE_LATENCY_SNAPSHOT: {
            size_t length;

            update_min_memblockq_length(u);

            length = pa_memblockq_get_length(u->sink_input->thread_info.render_memblockq);

            u->latency_snapshot.recv_counter = u->recv_counter;
            u->latency_snapshot.sink_input_buffer =
                pa_memblockq_get_length(u->memblockq) +
                (u->sink_input->thread_info.resampler ? pa_resampler_request(u->sink_input->thread_info.resampler, length) : length);
            u->latency_snapshot.sink_latency = pa_sink_get_latency_within_thread(u->sink_input->sink);

            u->latency_snapshot.max_request = pa_sink_input_get_max_request(u->sink_input);

            u->latency_snapshot.min_memblockq_length = u->min_memblockq_length;
            u->min_memblockq_length = (size_t) -1;

            return 0;
        }

        case SINK_INPUT_MESSAGE_MAX_REQUEST_CHANGED: {
            /* This message is sent from the IO thread to the main
             * thread! So don't be confused. All the user cases above
             * are executed in thread context, but this one is not! */

            pa_assert_ctl_context();

            if (u->time_event)
                adjust_rates(u);
            return 0;
        }
    }

    return pa_sink_input_process_msg(obj, code, data, offset, chunk);
}
示例#2
0
/* Called from output thread context */
static int sink_input_process_msg_cb(pa_msgobject *obj, int code, void *data, int64_t offset, pa_memchunk *chunk) {
    struct userdata *u = PA_SINK_INPUT(obj)->userdata;

    switch (code) {

        case PA_SINK_INPUT_MESSAGE_GET_LATENCY: {
            pa_usec_t *r = data;

            pa_sink_input_assert_io_context(u->sink_input);

            *r = pa_bytes_to_usec(pa_memblockq_get_length(u->memblockq), &u->sink_input->sample_spec);

            /* Fall through, the default handler will add in the extra
             * latency added by the resampler */
            break;
        }

        case SINK_INPUT_MESSAGE_POST:

            pa_sink_input_assert_io_context(u->sink_input);

            if (PA_SINK_IS_OPENED(u->sink_input->sink->thread_info.state))
                pa_memblockq_push_align(u->memblockq, chunk);
            else
                pa_memblockq_flush_write(u->memblockq, true);

            /* Is this the end of an underrun? Then let's start things
             * right-away */
            if (!u->in_pop &&
                u->sink_input->thread_info.underrun_for > 0 &&
                pa_memblockq_is_readable(u->memblockq)) {

                pa_log_debug("Requesting rewind due to end of underrun.");
                pa_sink_input_request_rewind(u->sink_input,
                                             (size_t) (u->sink_input->thread_info.underrun_for == (size_t) -1 ? 0 : u->sink_input->thread_info.underrun_for),
                                             false, true, false);
            }

            u->recv_counter += (int64_t) chunk->length;

            return 0;

        case SINK_INPUT_MESSAGE_REWIND:

            pa_sink_input_assert_io_context(u->sink_input);

            if (PA_SINK_IS_OPENED(u->sink_input->sink->thread_info.state))
                pa_memblockq_seek(u->memblockq, -offset, PA_SEEK_RELATIVE, true);
            else
                pa_memblockq_flush_write(u->memblockq, true);

            u->recv_counter -= offset;

            return 0;

        case SINK_INPUT_MESSAGE_LATENCY_SNAPSHOT: {
            size_t length;

            length = pa_memblockq_get_length(u->sink_input->thread_info.render_memblockq);

            u->latency_snapshot.recv_counter = u->recv_counter;
            u->latency_snapshot.sink_input_buffer = pa_memblockq_get_length(u->memblockq);
            /* Add content of render memblockq to sink latency */
            u->latency_snapshot.sink_latency = pa_sink_get_latency_within_thread(u->sink_input->sink) +
                                               pa_bytes_to_usec(length, &u->sink_input->sink->sample_spec);
            u->latency_snapshot.sink_timestamp = pa_rtclock_now();

            return 0;
        }
    }

    return pa_sink_input_process_msg(obj, code, data, offset, chunk);
}