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https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-02 09:01:46 -05:00
add adaptive resampler to the RTP receiver, other modernizations
git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/glitch-free@2433 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering
parent
cfc48422c8
commit
1a2e5a8a80
1 changed files with 129 additions and 22 deletions
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@ -51,6 +51,7 @@
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#include <pulsecore/atomic.h>
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#include <pulsecore/rtclock.h>
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#include <pulsecore/atomic.h>
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#include <pulsecore/time-smoother.h>
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#include "module-rtp-recv-symdef.h"
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@ -69,9 +70,11 @@ PA_MODULE_USAGE(
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#define SAP_PORT 9875
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#define DEFAULT_SAP_ADDRESS "224.0.0.56"
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#define MEMBLOCKQ_MAXLENGTH (1024*170)
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#define MEMBLOCKQ_MAXLENGTH (1024*1024*40)
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#define MAX_SESSIONS 16
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#define DEATH_TIMEOUT 20
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#define RATE_UPDATE_INTERVAL (5*PA_USEC_PER_SEC)
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#define LATENCY_USEC (500*PA_USEC_PER_MSEC)
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static const char* const valid_modargs[] = {
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"sink",
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@ -97,6 +100,12 @@ struct session {
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pa_rtpoll_item *rtpoll_item;
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pa_atomic_t timestamp;
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pa_smoother *smoother;
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pa_usec_t intended_latency;
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pa_usec_t sink_latency;
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pa_usec_t last_rate_update;
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};
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struct userdata {
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@ -133,7 +142,7 @@ static int sink_input_process_msg(pa_msgobject *o, int code, void *data, int64_t
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}
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/* Called from I/O thread context */
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static int sink_input_pop(pa_sink_input *i, size_t length, pa_memchunk *chunk) {
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static int sink_input_pop_cb(pa_sink_input *i, size_t length, pa_memchunk *chunk) {
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struct session *s;
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pa_sink_input_assert_ref(i);
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pa_assert_se(s = i->userdata);
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@ -146,6 +155,26 @@ static int sink_input_pop(pa_sink_input *i, size_t length, pa_memchunk *chunk) {
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return 0;
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}
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/* Called from I/O thread context */
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static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
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struct session *s;
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pa_sink_input_assert_ref(i);
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pa_assert_se(s = i->userdata);
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pa_memblockq_rewind(s->memblockq, nbytes);
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}
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/* Called from thread context */
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static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
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struct session *s;
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pa_sink_input_assert_ref(i);
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pa_assert_se(s = i->userdata);
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pa_memblockq_set_maxrewind(s->memblockq, nbytes);
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}
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/* Called from main context */
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static void sink_input_kill(pa_sink_input* i) {
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struct session *s;
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@ -211,20 +240,82 @@ static int rtpoll_work_cb(pa_rtpoll_item *i) {
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pa_memblockq_seek(s->memblockq, delta * s->rtp_context.frame_size, PA_SEEK_RELATIVE);
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pa_rtclock_get(&now);
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pa_smoother_put(s->smoother, pa_timeval_load(&now), pa_bytes_to_usec(pa_memblockq_get_write_index(s->memblockq), &s->sink_input->sample_spec));
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if (pa_memblockq_push(s->memblockq, &chunk) < 0) {
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/* queue overflow, let's flush it and try again */
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pa_memblockq_flush(s->memblockq);
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pa_memblockq_push(s->memblockq, &chunk);
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pa_log_warn("Queue overrun");
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pa_memblockq_seek(s->memblockq, chunk.length, PA_SEEK_RELATIVE);
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}
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pa_log("blocks in q: %u", pa_memblockq_get_nblocks(s->memblockq));
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pa_memblock_unref(chunk.memblock);
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/* The next timestamp we expect */
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s->offset = s->rtp_context.timestamp + (chunk.length / s->rtp_context.frame_size);
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pa_memblock_unref(chunk.memblock);
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pa_rtclock_get(&now);
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pa_atomic_store(&s->timestamp, now.tv_sec);
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if (s->last_rate_update + RATE_UPDATE_INTERVAL < pa_timeval_load(&now)) {
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pa_usec_t wi, ri, render_delay, sink_delay = 0, latency, fix;
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unsigned fix_samples;
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pa_log("Updating sample rate");
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wi = pa_smoother_get(s->smoother, pa_timeval_load(&now));
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ri = pa_bytes_to_usec(pa_memblockq_get_read_index(s->memblockq), &s->sink_input->sample_spec);
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if (PA_MSGOBJECT(s->sink_input->sink)->process_msg(PA_MSGOBJECT(s->sink_input->sink), PA_SINK_MESSAGE_GET_LATENCY, &sink_delay, 0, NULL) < 0)
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sink_delay = 0;
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render_delay = pa_bytes_to_usec(pa_memblockq_get_length(s->sink_input->thread_info.render_memblockq), &s->sink_input->sink->sample_spec);
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if (ri > render_delay+sink_delay)
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ri -= render_delay+sink_delay;
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else
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ri = 0;
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if (wi < ri)
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latency = 0;
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else
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latency = wi - ri;
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pa_log_debug("Write index deviates by %0.2f ms, expected %0.2f ms", (double) latency/PA_USEC_PER_MSEC, (double) s->intended_latency/PA_USEC_PER_MSEC);
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/* Calculate deviation */
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if (latency < s->intended_latency)
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fix = s->intended_latency - latency;
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else
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fix = latency - s->intended_latency;
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/* How many samples is this per second? */
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fix_samples = fix * s->sink_input->thread_info.sample_spec.rate / RATE_UPDATE_INTERVAL;
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/* Check if deviation is in bounds */
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if (fix_samples > s->sink_input->sample_spec.rate*.20)
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pa_log_debug("Hmmm, rate fix is too large (%lu Hz), not applying.", (unsigned long) fix_samples);
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/* Fix up rate */
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if (latency < s->intended_latency)
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s->sink_input->sample_spec.rate -= fix_samples;
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else
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s->sink_input->sample_spec.rate += fix_samples;
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pa_resampler_set_input_rate(s->sink_input->thread_info.resampler, s->sink_input->sample_spec.rate);
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pa_log_debug("Updated sampling rate to %lu Hz.", (unsigned long) s->sink_input->sample_spec.rate);
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s->last_rate_update = pa_timeval_load(&now);
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}
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if (pa_memblockq_is_readable(s->memblockq) &&
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s->sink_input->thread_info.underrun_for > 0) {
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pa_log_debug("Requesting rewind due to end of underrun");
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pa_sink_input_request_rewind(s->sink_input, 0, FALSE, TRUE);
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}
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return 1;
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}
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@ -310,7 +401,6 @@ fail:
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static struct session *session_new(struct userdata *u, const pa_sdp_info *sdp_info) {
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struct session *s = NULL;
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char *c;
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pa_sink *sink;
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int fd = -1;
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pa_memchunk silence;
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@ -325,33 +415,41 @@ static struct session *session_new(struct userdata *u, const pa_sdp_info *sdp_in
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goto fail;
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}
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if (!(sink = pa_namereg_get(u->module->core, u->sink_name, PA_NAMEREG_SINK, 1))) {
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if (!(sink = pa_namereg_get(u->module->core, u->sink_name, PA_NAMEREG_SINK, TRUE))) {
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pa_log("Sink does not exist.");
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goto fail;
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}
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pa_rtclock_get(&now);
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s = pa_xnew0(struct session, 1);
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s->userdata = u;
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s->first_packet = FALSE;
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s->sdp_info = *sdp_info;
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s->rtpoll_item = NULL;
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pa_rtclock_get(&now);
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s->intended_latency = LATENCY_USEC;
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s->smoother = pa_smoother_new(PA_USEC_PER_SEC*5, PA_USEC_PER_SEC*2, TRUE, 10);
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pa_smoother_set_time_offset(s->smoother, pa_timeval_load(&now));
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s->last_rate_update = pa_timeval_load(&now);
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pa_atomic_store(&s->timestamp, now.tv_sec);
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if ((fd = mcast_socket((const struct sockaddr*) &sdp_info->sa, sdp_info->salen)) < 0)
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goto fail;
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c = pa_sprintf_malloc("RTP Stream%s%s%s",
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sdp_info->session_name ? " (" : "",
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sdp_info->session_name ? sdp_info->session_name : "",
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sdp_info->session_name ? ")" : "");
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pa_sink_input_new_data_init(&data);
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data.sink = sink;
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data.driver = __FILE__;
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pa_proplist_sets(data.proplist, PA_PROP_MEDIA_NAME, c);
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pa_xfree(c);
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pa_proplist_sets(data.proplist, PA_PROP_MEDIA_ROLE, "stream");
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pa_proplist_setf(data.proplist, PA_PROP_MEDIA_NAME,
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"RTP Stream%s%s%s",
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sdp_info->session_name ? " (" : "",
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sdp_info->session_name ? sdp_info->session_name : "",
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sdp_info->session_name ? ")" : "");
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if (sdp_info->session_name)
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pa_proplist_sets(data.proplist, "rtp.session", sdp_info->session_name);
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pa_proplist_sets(data.proplist, "rtp.origin", sdp_info->origin);
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pa_proplist_setf(data.proplist, "rtp.payload", "%u", (unsigned) sdp_info->payload);
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data.module = u->module;
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pa_sink_input_new_data_set_sample_spec(&data, &sdp_info->sample_spec);
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@ -366,19 +464,26 @@ static struct session *session_new(struct userdata *u, const pa_sdp_info *sdp_in
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s->sink_input->userdata = s;
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s->sink_input->parent.process_msg = sink_input_process_msg;
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s->sink_input->pop = sink_input_pop;
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s->sink_input->pop = sink_input_pop_cb;
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s->sink_input->process_rewind = sink_input_process_rewind_cb;
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s->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
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s->sink_input->kill = sink_input_kill;
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s->sink_input->attach = sink_input_attach;
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s->sink_input->detach = sink_input_detach;
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pa_sink_input_get_silence(s->sink_input, &silence);
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s->sink_latency = pa_sink_input_set_requested_latency(s->sink_input, s->intended_latency/2);
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if (s->intended_latency < s->sink_latency*2)
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s->intended_latency = s->sink_latency*2;
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s->memblockq = pa_memblockq_new(
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0,
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MEMBLOCKQ_MAXLENGTH,
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MEMBLOCKQ_MAXLENGTH,
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pa_frame_size(&s->sink_input->sample_spec),
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pa_bytes_per_second(&s->sink_input->sample_spec)/10+1,
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pa_usec_to_bytes(s->intended_latency - s->sink_latency, &s->sink_input->sample_spec),
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0,
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0,
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&silence);
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@ -423,12 +528,14 @@ static void session_free(struct session *s) {
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pa_sdp_info_destroy(&s->sdp_info);
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pa_rtp_context_destroy(&s->rtp_context);
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pa_smoother_free(s->smoother);
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pa_xfree(s);
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}
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static void sap_event_cb(pa_mainloop_api *m, pa_io_event *e, int fd, pa_io_event_flags_t flags, void *userdata) {
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struct userdata *u = userdata;
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int goodbye;
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pa_bool_t goodbye = FALSE;
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pa_sdp_info info;
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struct session *s;
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