*
* The main thread is responsible for actually playing audio. In ALSA this
* means it waits until ALSA says it's ready for more audio which it then
- * plays.
+ * plays. See @ref clients/playrtp-alsa.c.
*
- * InCore Audio the main thread is only responsible for starting and stopping
+ * In Core Audio the main thread is only responsible for starting and stopping
* play: the system does the actual playback in its own private thread, and
- * calls adioproc() to fetch the audio data.
+ * calls adioproc() to fetch the audio data. See @ref
+ * clients/playrtp-coreaudio.c.
*
* Sometimes it happens that there is no audio available to play. This may
* because the server went away, or a packet was dropped, or the server
#include <locale.h>
#include <sys/uio.h>
#include <string.h>
+#include <assert.h>
+#include <errno.h>
#include "log.h"
#include "mem.h"
#include "vector.h"
#include "heap.h"
#include "timeval.h"
-
-#if HAVE_COREAUDIO_AUDIOHARDWARE_H
-# include <CoreAudio/AudioHardware.h>
-#endif
-#if API_ALSA
-#include <alsa/asoundlib.h>
-#endif
+#include "playrtp.h"
#define readahead linux_headers_are_borked
static FILE *logfp;
/** @brief Output device */
-static const char *device;
-
-/** @brief Maximum samples per packet we'll support
- *
- * NB that two channels = two samples in this program.
- */
-#define MAXSAMPLES 2048
+const char *device;
/** @brief Minimum low watermark
*
* We'll stop playing if there's only this many samples in the buffer. */
-static unsigned minbuffer = 2 * 44100 / 10; /* 0.2 seconds */
+unsigned minbuffer = 2 * 44100 / 10; /* 0.2 seconds */
/** @brief Buffer high watermark
*
* We'll stop reading from the network if we have this many samples. */
static unsigned maxbuffer;
-/** @brief Number of samples to infill by in one go
- *
- * This is an upper bound - in practice we expect the underlying audio API to
- * only ask for a much smaller number of samples in any one go.
- */
-#define INFILL_SAMPLES (44100 * 2) /* 1s */
-
-/** @brief Received packet
- *
- * Received packets are kept in a binary heap (see @ref pheap) ordered by
- * timestamp.
- */
-struct packet {
- /** @brief Next packet in @ref next_free_packet or @ref received_packets */
- struct packet *next;
-
- /** @brief Number of samples in this packet */
- uint32_t nsamples;
-
- /** @brief Timestamp from RTP packet
- *
- * NB that "timestamps" are really sample counters. Use lt() or lt_packet()
- * to compare timestamps.
- */
- uint32_t timestamp;
-
- /** @brief Flags
- *
- * Valid values are:
- * - @ref IDLE - the idle bit was set in the RTP packet
- */
- unsigned flags;
-/** @brief idle bit set in RTP packet*/
-#define IDLE 0x0001
-
- /** @brief Raw sample data
- *
- * Only the first @p nsamples samples are defined; the rest is uninitialized
- * data.
- */
- uint16_t samples_raw[MAXSAMPLES];
-};
-
-/** @brief Return true iff \f$a < b\f$ in sequence-space arithmetic
- *
- * Specifically it returns true if \f$(a-b) mod 2^{32} < 2^{31}\f$.
- *
- * See also lt_packet().
- */
-static inline int lt(uint32_t a, uint32_t b) {
- return (uint32_t)(a - b) & 0x80000000;
-}
-
-/** @brief Return true iff a >= b in sequence-space arithmetic */
-static inline int ge(uint32_t a, uint32_t b) {
- return !lt(a, b);
-}
-
-/** @brief Return true iff a > b in sequence-space arithmetic */
-static inline int gt(uint32_t a, uint32_t b) {
- return lt(b, a);
-}
-
-/** @brief Return true iff a <= b in sequence-space arithmetic */
-static inline int le(uint32_t a, uint32_t b) {
- return !lt(b, a);
-}
-
-/** @brief Ordering for packets, used by @ref pheap */
-static inline int lt_packet(const struct packet *a, const struct packet *b) {
- return lt(a->timestamp, b->timestamp);
-}
-
/** @brief Received packets
* Protected by @ref receive_lock
*
* it and adds them to @ref packets. Whenever a packet is added to it, @ref
* receive_cond is signalled.
*/
-static struct packet *received_packets;
+struct packet *received_packets;
/** @brief Tail of @ref received_packets
* Protected by @ref receive_lock
*/
-static struct packet **received_tail = &received_packets;
+struct packet **received_tail = &received_packets;
/** @brief Lock protecting @ref received_packets
*
* Only listen_thread() and queue_thread() ever hold this lock. It is vital
* that queue_thread() not hold it any longer than it strictly has to. */
-static pthread_mutex_t receive_lock = PTHREAD_MUTEX_INITIALIZER;
+pthread_mutex_t receive_lock = PTHREAD_MUTEX_INITIALIZER;
/** @brief Condition variable signalled when @ref received_packets is updated
*
* Used by listen_thread() to notify queue_thread() that it has added another
* packet to @ref received_packets. */
-static pthread_cond_t receive_cond = PTHREAD_COND_INITIALIZER;
+pthread_cond_t receive_cond = PTHREAD_COND_INITIALIZER;
/** @brief Length of @ref received_packets */
-static uint32_t nreceived;
-
-/** @struct pheap
- * @brief Binary heap of packets ordered by timestamp */
-HEAP_TYPE(pheap, struct packet *, lt_packet);
+uint32_t nreceived;
/** @brief Binary heap of received packets */
-static struct pheap packets;
+struct pheap packets;
/** @brief Total number of samples available
*
* We make this volatile because we inspect it without a protecting lock,
* so the usual pthread_* guarantees aren't available.
*/
-static volatile uint32_t nsamples;
+volatile uint32_t nsamples;
/** @brief Timestamp of next packet to play.
*
* This is set to the timestamp of the last packet, plus the number of
* samples it contained. Only valid if @ref active is nonzero.
*/
-static uint32_t next_timestamp;
+uint32_t next_timestamp;
/** @brief True if actively playing
*
* This is true when playing and false when just buffering. */
-static int active;
+int active;
/** @brief Lock protecting @ref packets */
-static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
/** @brief Condition variable signalled whenever @ref packets is changed */
-static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
-
-/** @brief Structure of free packet list */
-union free_packet {
- struct packet p;
- union free_packet *next;
-};
-
-/** @brief Linked list of free packets
- *
- * This is a linked list of formerly used packets. For preference we re-use
- * packets that have already been used rather than unused ones, to limit the
- * size of the program's working set. If there are no free packets in the list
- * we try @ref next_free_packet instead.
- *
- * Must hold @ref lock when accessing this.
- */
-static union free_packet *free_packets;
+pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
-/** @brief Array of new free packets
- *
- * There are @ref count_free_packets ready to use at this address. If there
- * are none left we allocate more memory.
- *
- * Must hold @ref lock when accessing this.
- */
-static union free_packet *next_free_packet;
+#if HAVE_ALSA_ASOUNDLIB_H
+# define DEFAULT_BACKEND playrtp_alsa
+#elif HAVE_SYS_SOUNDCARD_H
+# define DEFAULT_BACKEND playrtp_oss
+#elif HAVE_COREAUDIO_AUDIOHARDWARE_H
+# define DEFAULT_BACKEND playrtp_coreaudio
+#else
+# error No known backend
+#endif
-/** @brief Count of new free packets at @ref next_free_packet
- *
- * Must hold @ref lock when accessing this.
- */
-static size_t count_free_packets;
+/** @brief Backend to play with */
+static void (*backend)(void) = &DEFAULT_BACKEND;
-/** @brief Lock protecting packet allocator */
-static pthread_mutex_t mem_lock = PTHREAD_MUTEX_INITIALIZER;
+HEAP_DEFINE(pheap, struct packet *, lt_packet);
static const struct option options[] = {
{ "help", no_argument, 0, 'h' },
{ "min", required_argument, 0, 'm' },
{ "max", required_argument, 0, 'x' },
{ "buffer", required_argument, 0, 'b' },
+ { "rcvbuf", required_argument, 0, 'R' },
+ { "multicast", required_argument, 0, 'M' },
+#if HAVE_SYS_SOUNDCARD_H
+ { "oss", no_argument, 0, 'o' },
+#endif
+#if HAVE_ALSA_ASOUNDLIB_H
+ { "alsa", no_argument, 0, 'a' },
+#endif
+#if HAVE_COREAUDIO_AUDIOHARDWARE_H
+ { "core-audio", no_argument, 0, 'c' },
+#endif
{ 0, 0, 0, 0 }
};
-/** @Brief Return a new packet */
-static struct packet *new_packet(void) {
- struct packet *p;
-
- pthread_mutex_lock(&mem_lock);
- if(free_packets) {
- p = &free_packets->p;
- free_packets = free_packets->next;
- } else {
- if(!count_free_packets) {
- next_free_packet = xcalloc(1024, sizeof (union free_packet));
- count_free_packets = 1024;
- }
- p = &(next_free_packet++)->p;
- --count_free_packets;
- }
- pthread_mutex_unlock(&mem_lock);
- return p;
-}
-
-/** @brief Free a packet */
-static void free_packet(struct packet *p) {
- union free_packet *u = (union free_packet *)p;
- pthread_mutex_lock(&mem_lock);
- u->next = free_packets;
- free_packets = u;
- pthread_mutex_unlock(&mem_lock);
-}
-
/** @brief Drop the first packet
*
* Assumes that @ref lock is held.
if(pheap_count(&packets)) {
struct packet *const p = pheap_remove(&packets);
nsamples -= p->nsamples;
- free_packet(p);
+ playrtp_free_packet(p);
pthread_cond_broadcast(&cond);
}
}
* thread which reads packets off the list and adds them to the heap.
*
* We keep memory allocation (mostly) very fast by keeping pre-allocated
- * packets around; see @ref new_packet().
+ * packets around; see @ref playrtp_new_packet().
*/
static void *listen_thread(void attribute((unused)) *arg) {
struct packet *p = 0;
for(;;) {
if(!p)
- p = new_packet();
+ p = playrtp_new_packet();
iov[0].iov_base = &header;
iov[0].iov_len = sizeof header;
iov[1].iov_base = p->samples_raw;
}
}
-/** @brief Return true if @p p contains @p timestamp
- *
- * Containment implies that a sample @p timestamp exists within the packet.
- */
-static inline int contains(const struct packet *p, uint32_t timestamp) {
- const uint32_t packet_start = p->timestamp;
- const uint32_t packet_end = p->timestamp + p->nsamples;
-
- return (ge(timestamp, packet_start)
- && lt(timestamp, packet_end));
-}
-
/** @brief Wait until the buffer is adequately full
*
* Must be called with @ref lock held.
*/
-static void fill_buffer(void) {
+void playrtp_fill_buffer(void) {
+ while(nsamples)
+ drop_first_packet();
info("Buffering...");
while(nsamples < readahead)
pthread_cond_wait(&cond, &lock);
*
* Must be called with @ref lock held.
*/
-static struct packet *next_packet(void) {
+struct packet *playrtp_next_packet(void) {
while(pheap_count(&packets)) {
struct packet *const p = pheap_first(&packets);
if(le(p->timestamp + p->nsamples, next_timestamp)) {
return 0;
}
-#if HAVE_COREAUDIO_AUDIOHARDWARE_H
-/** @brief Callback from Core Audio */
-static OSStatus adioproc
- (AudioDeviceID attribute((unused)) inDevice,
- const AudioTimeStamp attribute((unused)) *inNow,
- const AudioBufferList attribute((unused)) *inInputData,
- const AudioTimeStamp attribute((unused)) *inInputTime,
- AudioBufferList *outOutputData,
- const AudioTimeStamp attribute((unused)) *inOutputTime,
- void attribute((unused)) *inClientData) {
- UInt32 nbuffers = outOutputData->mNumberBuffers;
- AudioBuffer *ab = outOutputData->mBuffers;
- uint32_t samples_available;
-
- pthread_mutex_lock(&lock);
- while(nbuffers > 0) {
- float *samplesOut = ab->mData;
- size_t samplesOutLeft = ab->mDataByteSize / sizeof (float);
-
- while(samplesOutLeft > 0) {
- const struct packet *p = next_packet();
- if(p && contains(p, next_timestamp)) {
- /* This packet is ready to play */
- const uint32_t packet_end = p->timestamp + p->nsamples;
- const uint32_t offset = next_timestamp - p->timestamp;
- const uint16_t *ptr = (void *)(p->samples_raw + offset);
-
- samples_available = packet_end - next_timestamp;
- if(samples_available > samplesOutLeft)
- samples_available = samplesOutLeft;
- next_timestamp += samples_available;
- samplesOutLeft -= samples_available;
- while(samples_available-- > 0)
- *samplesOut++ = (int16_t)ntohs(*ptr++) * (0.5 / 32767);
- /* We don't bother junking the packet - that'll be dealt with next time
- * round */
- } else {
- /* No packet is ready to play (and there might be no packet at all) */
- samples_available = p ? p->timestamp - next_timestamp
- : samplesOutLeft;
- if(samples_available > samplesOutLeft)
- samples_available = samplesOutLeft;
- //info("infill by %"PRIu32, samples_available);
- /* Conveniently the buffer is 0 to start with */
- next_timestamp += samples_available;
- samplesOut += samples_available;
- samplesOutLeft -= samples_available;
- }
- }
- ++ab;
- --nbuffers;
- }
- pthread_mutex_unlock(&lock);
- return 0;
-}
-#endif
-
-
-#if API_ALSA
-/** @brief PCM handle */
-static snd_pcm_t *pcm;
-
-/** @brief True when @ref pcm is up and running */
-static int alsa_prepared = 1;
-
-/** @brief Initialize @ref pcm */
-static void setup_alsa(void) {
- snd_pcm_hw_params_t *hwparams;
- snd_pcm_sw_params_t *swparams;
- /* Only support one format for now */
- const int sample_format = SND_PCM_FORMAT_S16_BE;
- unsigned rate = 44100;
- const int channels = 2;
- const int samplesize = channels * sizeof(uint16_t);
- snd_pcm_uframes_t pcm_bufsize = MAXSAMPLES * samplesize * 3;
- /* If we can write more than this many samples we'll get a wakeup */
- const int avail_min = 256;
- int err;
-
- /* Open ALSA */
- if((err = snd_pcm_open(&pcm,
- device ? device : "default",
- SND_PCM_STREAM_PLAYBACK,
- SND_PCM_NONBLOCK)))
- fatal(0, "error from snd_pcm_open: %d", err);
- /* Set up 'hardware' parameters */
- snd_pcm_hw_params_alloca(&hwparams);
- if((err = snd_pcm_hw_params_any(pcm, hwparams)) < 0)
- fatal(0, "error from snd_pcm_hw_params_any: %d", err);
- if((err = snd_pcm_hw_params_set_access(pcm, hwparams,
- SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
- fatal(0, "error from snd_pcm_hw_params_set_access: %d", err);
- if((err = snd_pcm_hw_params_set_format(pcm, hwparams,
- sample_format)) < 0)
-
- fatal(0, "error from snd_pcm_hw_params_set_format (%d): %d",
- sample_format, err);
- if((err = snd_pcm_hw_params_set_rate_near(pcm, hwparams, &rate, 0)) < 0)
- fatal(0, "error from snd_pcm_hw_params_set_rate (%d): %d",
- rate, err);
- if((err = snd_pcm_hw_params_set_channels(pcm, hwparams,
- channels)) < 0)
- fatal(0, "error from snd_pcm_hw_params_set_channels (%d): %d",
- channels, err);
- if((err = snd_pcm_hw_params_set_buffer_size_near(pcm, hwparams,
- &pcm_bufsize)) < 0)
- fatal(0, "error from snd_pcm_hw_params_set_buffer_size (%d): %d",
- MAXSAMPLES * samplesize * 3, err);
- if((err = snd_pcm_hw_params(pcm, hwparams)) < 0)
- fatal(0, "error calling snd_pcm_hw_params: %d", err);
- /* Set up 'software' parameters */
- snd_pcm_sw_params_alloca(&swparams);
- if((err = snd_pcm_sw_params_current(pcm, swparams)) < 0)
- fatal(0, "error calling snd_pcm_sw_params_current: %d", err);
- if((err = snd_pcm_sw_params_set_avail_min(pcm, swparams, avail_min)) < 0)
- fatal(0, "error calling snd_pcm_sw_params_set_avail_min %d: %d",
- avail_min, err);
- if((err = snd_pcm_sw_params(pcm, swparams)) < 0)
- fatal(0, "error calling snd_pcm_sw_params: %d", err);
-}
-
-/** @brief Wait until ALSA wants some audio */
-static void wait_alsa(void) {
- struct pollfd fds[64];
- int nfds, err;
- unsigned short events;
-
- for(;;) {
- do {
- if((nfds = snd_pcm_poll_descriptors(pcm,
- fds, sizeof fds / sizeof *fds)) < 0)
- fatal(0, "error calling snd_pcm_poll_descriptors: %d", nfds);
- } while(poll(fds, nfds, -1) < 0 && errno == EINTR);
- if((err = snd_pcm_poll_descriptors_revents(pcm, fds, nfds, &events)))
- fatal(0, "error calling snd_pcm_poll_descriptors_revents: %d", err);
- if(events & POLLOUT)
- return;
- }
-}
-
-/** @brief Play some sound via ALSA
- * @param s Pointer to sample data
- * @param n Number of samples
- * @return 0 on success, -1 on non-fatal error
- */
-static int alsa_writei(const void *s, size_t n) {
- /* Do the write */
- const snd_pcm_sframes_t frames_written = snd_pcm_writei(pcm, s, n / 2);
- if(frames_written < 0) {
- /* Something went wrong */
- switch(frames_written) {
- case -EAGAIN:
- return 0;
- case -EPIPE:
- error(0, "error calling snd_pcm_writei: %ld",
- (long)frames_written);
- return -1;
- default:
- fatal(0, "error calling snd_pcm_writei: %ld",
- (long)frames_written);
- }
- } else {
- /* Success */
- next_timestamp += frames_written * 2;
- return 0;
- }
-}
-
-/** @brief Play the relevant part of a packet
- * @param p Packet to play
- * @return 0 on success, -1 on non-fatal error
- */
-static int alsa_play(const struct packet *p) {
- return alsa_writei(p->samples_raw + next_timestamp - p->timestamp,
- (p->timestamp + p->nsamples) - next_timestamp);
-}
-
-/** @brief Play some silence
- * @param p Next packet or NULL
- * @return 0 on success, -1 on non-fatal error
- */
-static int alsa_infill(const struct packet *p) {
- static const uint16_t zeros[INFILL_SAMPLES];
- size_t samples_available = INFILL_SAMPLES;
-
- if(p && samples_available > p->timestamp - next_timestamp)
- samples_available = p->timestamp - next_timestamp;
- return alsa_writei(zeros, samples_available);
-}
-
-/** @brief Reset ALSA state after we lost synchronization */
-static void alsa_reset(int hard_reset) {
- int err;
-
- if((err = snd_pcm_nonblock(pcm, 0)))
- fatal(0, "error calling snd_pcm_nonblock: %d", err);
- if(hard_reset) {
- if((err = snd_pcm_drop(pcm)))
- fatal(0, "error calling snd_pcm_drop: %d", err);
- } else
- if((err = snd_pcm_drain(pcm)))
- fatal(0, "error calling snd_pcm_drain: %d", err);
- if((err = snd_pcm_nonblock(pcm, 1)))
- fatal(0, "error calling snd_pcm_nonblock: %d", err);
- alsa_prepared = 0;
-}
-#endif
-
/** @brief Play an RTP stream
*
* This is the guts of the program. It is responsible for:
pthread_create(<id, 0, listen_thread, 0);
/* We have a second thread to add received packets to the queue */
pthread_create(<id, 0, queue_thread, 0);
-#if API_ALSA
- {
- struct packet *p;
- int escape, err;
-
- /* Open the sound device */
- setup_alsa();
- pthread_mutex_lock(&lock);
- for(;;) {
- /* Wait for the buffer to fill up a bit */
- fill_buffer();
- if(!alsa_prepared) {
- if((err = snd_pcm_prepare(pcm)))
- fatal(0, "error calling snd_pcm_prepare: %d", err);
- alsa_prepared = 1;
- }
- escape = 0;
- info("Playing...");
- /* Keep playing until the buffer empties out, or ALSA tells us to get
- * lost */
- while(nsamples >= minbuffer && !escape) {
- /* Wait for ALSA to ask us for more data */
- pthread_mutex_unlock(&lock);
- wait_alsa();
- pthread_mutex_lock(&lock);
- /* ALSA is ready for more data, find something to play */
- p = next_packet();
- /* Play it or play some silence */
- if(contains(p, next_timestamp))
- escape = alsa_play(p);
- else
- escape = alsa_infill(p);
- }
- active = 0;
- /* We stop playing for a bit until the buffer re-fills */
- pthread_mutex_unlock(&lock);
- alsa_reset(escape);
- pthread_mutex_lock(&lock);
- }
-
- }
-#elif HAVE_COREAUDIO_AUDIOHARDWARE_H
- {
- OSStatus status;
- UInt32 propertySize;
- AudioDeviceID adid;
- AudioStreamBasicDescription asbd;
-
- /* If this looks suspiciously like libao's macosx driver there's an
- * excellent reason for that... */
-
- /* TODO report errors as strings not numbers */
- propertySize = sizeof adid;
- status = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice,
- &propertySize, &adid);
- if(status)
- fatal(0, "AudioHardwareGetProperty: %d", (int)status);
- if(adid == kAudioDeviceUnknown)
- fatal(0, "no output device");
- propertySize = sizeof asbd;
- status = AudioDeviceGetProperty(adid, 0, false,
- kAudioDevicePropertyStreamFormat,
- &propertySize, &asbd);
- if(status)
- fatal(0, "AudioHardwareGetProperty: %d", (int)status);
- D(("mSampleRate %f", asbd.mSampleRate));
- D(("mFormatID %08lx", asbd.mFormatID));
- D(("mFormatFlags %08lx", asbd.mFormatFlags));
- D(("mBytesPerPacket %08lx", asbd.mBytesPerPacket));
- D(("mFramesPerPacket %08lx", asbd.mFramesPerPacket));
- D(("mBytesPerFrame %08lx", asbd.mBytesPerFrame));
- D(("mChannelsPerFrame %08lx", asbd.mChannelsPerFrame));
- D(("mBitsPerChannel %08lx", asbd.mBitsPerChannel));
- D(("mReserved %08lx", asbd.mReserved));
- if(asbd.mFormatID != kAudioFormatLinearPCM)
- fatal(0, "audio device does not support kAudioFormatLinearPCM");
- status = AudioDeviceAddIOProc(adid, adioproc, 0);
- if(status)
- fatal(0, "AudioDeviceAddIOProc: %d", (int)status);
- pthread_mutex_lock(&lock);
- for(;;) {
- /* Wait for the buffer to fill up a bit */
- fill_buffer();
- /* Start playing now */
- info("Playing...");
- next_timestamp = pheap_first(&packets)->timestamp;
- active = 1;
- status = AudioDeviceStart(adid, adioproc);
- if(status)
- fatal(0, "AudioDeviceStart: %d", (int)status);
- /* Wait until the buffer empties out */
- while(nsamples >= minbuffer)
- pthread_cond_wait(&cond, &lock);
- /* Stop playing for a bit until the buffer re-fills */
- status = AudioDeviceStop(adid, adioproc);
- if(status)
- fatal(0, "AudioDeviceStop: %d", (int)status);
- active = 0;
- /* Go back round */
- }
- }
-#else
-# error No known audio API
-#endif
+ /* The rest of the work is backend-specific */
+ backend();
}
/* display usage message and terminate */
" --min, -m FRAMES Buffer low water mark\n"
" --buffer, -b FRAMES Buffer high water mark\n"
" --max, -x FRAMES Buffer maximum size\n"
+ " --rcvbuf, -R BYTES Socket receive buffer size\n"
+ " --multicast, -M GROUP Join multicast group\n"
+#if HAVE_ALSA_ASOUNDLIB_H
+ " --alsa, -a Use ALSA to play audio\n"
+#endif
+#if HAVE_SYS_SOUNDCARD_H
+ " --oss, -o Use OSS to play audio\n"
+#endif
+#if HAVE_COREAUDIO_AUDIOHARDWARE_H
+ " --core-audio, -c Use Core Audio to play audio\n"
+#endif
" --help, -h Display usage message\n"
" --version, -V Display version number\n"
);
struct addrinfo *res;
struct stringlist sl;
char *sockname;
+ int rcvbuf, target_rcvbuf = 131072;
+ socklen_t len;
+ char *multicast_group = 0;
+ struct ip_mreq mreq;
+ struct ipv6_mreq mreq6;
static const struct addrinfo prefs = {
AI_PASSIVE,
mem_init();
if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale");
- while((n = getopt_long(argc, argv, "hVdD:m:b:x:L:", options, 0)) >= 0) {
+ while((n = getopt_long(argc, argv, "hVdD:m:b:x:L:R:M:aoc", options, 0)) >= 0) {
switch(n) {
case 'h': help();
case 'V': version();
case 'b': readahead = 2 * atol(optarg); break;
case 'x': maxbuffer = 2 * atol(optarg); break;
case 'L': logfp = fopen(optarg, "w"); break;
+ case 'R': target_rcvbuf = atoi(optarg); break;
+ case 'M': multicast_group = optarg; break;
+#if HAVE_ALSA_ASOUNDLIB_H
+ case 'a': backend = playrtp_alsa; break;
+#endif
+#if HAVE_SYS_SOUNDCARD_H
+ case 'o': backend = playrtp_oss; break;
+#endif
+#if HAVE_COREAUDIO_AUDIOHARDWARE_H
+ case 'c': backend = playrtp_coreaudio; break;
+#endif
default: fatal(0, "invalid option");
}
}
fatal(errno, "error creating socket");
if(bind(rtpfd, res->ai_addr, res->ai_addrlen) < 0)
fatal(errno, "error binding socket to %s", sockname);
+ if(multicast_group) {
+ if((n = getaddrinfo(multicast_group, 0, &prefs, &res)))
+ fatal(0, "getaddrinfo %s: %s", multicast_group, gai_strerror(n));
+ switch(res->ai_family) {
+ case PF_INET:
+ mreq.imr_multiaddr = ((struct sockaddr_in *)res->ai_addr)->sin_addr;
+ mreq.imr_interface.s_addr = 0; /* use primary interface */
+ if(setsockopt(rtpfd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
+ &mreq, sizeof mreq) < 0)
+ fatal(errno, "error calling setsockopt IP_ADD_MEMBERSHIP");
+ break;
+ case PF_INET6:
+ mreq6.ipv6mr_multiaddr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
+ memset(&mreq6.ipv6mr_interface, 0, sizeof mreq6.ipv6mr_interface);
+ if(setsockopt(rtpfd, IPPROTO_IPV6, IPV6_JOIN_GROUP,
+ &mreq6, sizeof mreq6) < 0)
+ fatal(errno, "error calling setsockopt IPV6_JOIN_GROUP");
+ break;
+ default:
+ fatal(0, "unsupported address family %d", res->ai_family);
+ }
+ }
+ len = sizeof rcvbuf;
+ if(getsockopt(rtpfd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, &len) < 0)
+ fatal(errno, "error calling getsockopt SO_RCVBUF");
+ if(target_rcvbuf > rcvbuf) {
+ if(setsockopt(rtpfd, SOL_SOCKET, SO_RCVBUF,
+ &target_rcvbuf, sizeof target_rcvbuf) < 0)
+ error(errno, "error calling setsockopt SO_RCVBUF %d",
+ target_rcvbuf);
+ /* We try to carry on anyway */
+ else
+ info("changed socket receive buffer from %d to %d",
+ rcvbuf, target_rcvbuf);
+ } else
+ info("default socket receive buffer %d", rcvbuf);
+ if(logfp)
+ info("WARNING: -L option can impact performance");
play_rtp();
return 0;
}
~mdw / disorder / blobdiff