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@@ -1,777 +1,777 @@
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-
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-/*
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- * HairTunes - RAOP packet handler and slave-clocked replay engine
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- * Copyright (c) James Laird 2011
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- * All rights reserved.
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- *
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- * Modularisation: philippe_44@outlook.com, 2019
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- *
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- * Permission is hereby granted, free of charge, to any person
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- * obtaining a copy of this software and associated documentation
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- * files (the "Software"), to deal in the Software without
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- * restriction, including without limitation the rights to use,
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- * copy, modify, merge, publish, distribute, sublicense, and/or
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- * sell copies of the Software, and to permit persons to whom the
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- * Software is furnished to do so, subject to the following conditions:
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- *
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- * The above copyright notice and this permission notice shall be
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- * included in all copies or substantial portions of the Software.
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- *
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- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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- * OTHER DEALINGS IN THE SOFTWARE.
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- */
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-
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-#include <stdio.h>
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-#include <stdlib.h>
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-#include <string.h>
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-#include <stdarg.h>
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-#include <sys/types.h>
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-#include <pthread.h>
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-#include <math.h>
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-#include <errno.h>
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-#include <sys/stat.h>
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-#include <stdint.h>
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-#include <fcntl.h>
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-#include <assert.h>
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-
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-#include "platform.h"
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-#include "rtp.h"
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-#include "raop_sink.h"
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-#include "log_util.h"
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-#include "util.h"
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-
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-#ifdef WIN32
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-#include <openssl/aes.h>
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-#include "alac_wrapper.h"
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-#else
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-#include "esp_pthread.h"
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-#include "esp_system.h"
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-#include <mbedtls/version.h>
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-#include <mbedtls/aes.h>
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-#include "alac_wrapper.h"
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-#endif
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-
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-#define NTP2MS(ntp) ((((ntp) >> 10) * 1000L) >> 22)
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+
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+/*
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+ * HairTunes - RAOP packet handler and slave-clocked replay engine
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+ * Copyright (c) James Laird 2011
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+ * All rights reserved.
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+ *
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+ * Modularisation: philippe_44@outlook.com, 2019
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+ *
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+ * Permission is hereby granted, free of charge, to any person
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+ * obtaining a copy of this software and associated documentation
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+ * files (the "Software"), to deal in the Software without
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+ * restriction, including without limitation the rights to use,
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+ * copy, modify, merge, publish, distribute, sublicense, and/or
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+ * sell copies of the Software, and to permit persons to whom the
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+ * Software is furnished to do so, subject to the following conditions:
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+ *
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+ * The above copyright notice and this permission notice shall be
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+ * included in all copies or substantial portions of the Software.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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+ * OTHER DEALINGS IN THE SOFTWARE.
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+ */
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+
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+#include <stdio.h>
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+#include <stdlib.h>
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+#include <string.h>
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+#include <stdarg.h>
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+#include <sys/types.h>
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+#include <pthread.h>
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+#include <math.h>
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+#include <errno.h>
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+#include <sys/stat.h>
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+#include <stdint.h>
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+#include <fcntl.h>
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+#include <assert.h>
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+
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+#include "platform.h"
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+#include "rtp.h"
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+#include "raop_sink.h"
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+#include "log_util.h"
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+#include "util.h"
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+
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+#ifdef WIN32
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+#include <openssl/aes.h>
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+#include "alac_wrapper.h"
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+#else
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+#include "esp_pthread.h"
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+#include "esp_system.h"
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+#include <mbedtls/version.h>
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+#include <mbedtls/aes.h>
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+#include "alac_wrapper.h"
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+#endif
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+
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+#define NTP2MS(ntp) ((((ntp) >> 10) * 1000L) >> 22)
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#define MS2NTP(ms) (((((u64_t) (ms)) << 22) / 1000) << 10)
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#define NTP2TS(ntp, rate) ((((ntp) >> 16) * (rate)) >> 16)
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#define TS2NTP(ts, rate) (((((u64_t) (ts)) << 16) / (rate)) << 16)
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#define MS2TS(ms, rate) ((((u64_t) (ms)) * (rate)) / 1000)
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#define TS2MS(ts, rate) NTP2MS(TS2NTP(ts,rate))
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-
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+
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extern log_level raop_loglevel;
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-
static log_level *loglevel = &raop_loglevel;
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-
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-//#define __RTP_STORE
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-
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-// default buffer size
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-#define BUFFER_FRAMES ( (150 * RAOP_SAMPLE_RATE * 2) / (352 * 100) )
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-#define MAX_PACKET 1408
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-#define MIN_LATENCY 11025
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-#define MAX_LATENCY ( (120 * RAOP_SAMPLE_RATE * 2) / 100 )
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-
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-#define RTP_STACK_SIZE (4*1024)
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-
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-#define RTP_SYNC (0x01)
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-#define NTP_SYNC (0x02)
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-
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-#define RESEND_TO 200
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-
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-enum { DATA = 0, CONTROL, TIMING };
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-
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-static const u8_t silence_frame[MAX_PACKET] = { 0 };
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-
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-typedef u16_t seq_t;
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-typedef struct audio_buffer_entry { // decoded audio packets
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- int ready;
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- u32_t rtptime, last_resend;
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- s16_t *data;
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- int len;
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-} abuf_t;
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-
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-typedef struct rtp_s {
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-#ifdef __RTP_STORE
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- FILE *rtpIN, *rtpOUT;
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-#endif
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- bool running;
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- unsigned char aesiv[16];
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-#ifdef WIN32
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- AES_KEY aes;
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-#else
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- mbedtls_aes_context aes;
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-#endif
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- bool decrypt;
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- u8_t *decrypt_buf;
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- u32_t frame_size, frame_duration;
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- u32_t in_frames, out_frames;
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- struct in_addr host;
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- struct sockaddr_in rtp_host;
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- struct {
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- unsigned short rport, lport;
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- int sock;
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- } rtp_sockets[3]; // data, control, timing
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- struct timing_s {
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- u64_t local, remote;
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- } timing;
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- struct {
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- u32_t rtp, time;
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- u8_t status;
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- } synchro;
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- struct {
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- u32_t time;
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- seq_t seqno;
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- u32_t rtptime;
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- } record;
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- int latency; // rtp hold depth in samples
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- u32_t resent_req, resent_rec; // total resent + recovered frames
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- u32_t silent_frames; // total silence frames
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- u32_t discarded;
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- abuf_t audio_buffer[BUFFER_FRAMES];
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- seq_t ab_read, ab_write;
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- pthread_mutex_t ab_mutex;
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-#ifdef WIN32
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- pthread_t thread;
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-#else
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- TaskHandle_t thread, joiner;
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- StaticTask_t *xTaskBuffer;
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- StackType_t *xStack;
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-#endif
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-
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- struct alac_codec_s *alac_codec;
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- int flush_seqno;
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- bool playing;
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- raop_data_cb_t data_cb;
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- raop_cmd_cb_t cmd_cb;
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-} rtp_t;
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-
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-
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-#define BUFIDX(seqno) ((seq_t)(seqno) % BUFFER_FRAMES)
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-static void buffer_alloc(abuf_t *audio_buffer, int size);
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-static void buffer_release(abuf_t *audio_buffer);
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-static void buffer_reset(abuf_t *audio_buffer);
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-static void buffer_push_packet(rtp_t *ctx);
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-static bool rtp_request_resend(rtp_t *ctx, seq_t first, seq_t last);
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-static bool rtp_request_timing(rtp_t *ctx);
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-static void* rtp_thread_func(void *arg);
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-static int seq_order(seq_t a, seq_t b);
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-
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-/*---------------------------------------------------------------------------*/
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-static struct alac_codec_s* alac_init(int fmtp[32]) {
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- struct alac_codec_s *alac;
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- unsigned sample_rate;
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- unsigned char sample_size, channels;
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- struct {
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- uint32_t frameLength;
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- uint8_t compatibleVersion;
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- uint8_t bitDepth;
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- uint8_t pb;
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- uint8_t mb;
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- uint8_t kb;
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- uint8_t numChannels;
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- uint16_t maxRun;
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- uint32_t maxFrameBytes;
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- uint32_t avgBitRate;
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- uint32_t sampleRate;
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- } config;
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-
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- config.frameLength = htonl(fmtp[1]);
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- config.compatibleVersion = fmtp[2];
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- config.bitDepth = fmtp[3];
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- config.pb = fmtp[4];
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- config.mb = fmtp[5];
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- config.kb = fmtp[6];
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- config.numChannels = fmtp[7];
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- config.maxRun = htons(fmtp[8]);
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- config.maxFrameBytes = htonl(fmtp[9]);
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- config.avgBitRate = htonl(fmtp[10]);
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- config.sampleRate = htonl(fmtp[11]);
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-
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- alac = alac_create_decoder(sizeof(config), (unsigned char*) &config, &sample_size, &sample_rate, &channels);
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- if (!alac) {
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- LOG_ERROR("cannot create alac codec", NULL);
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- return NULL;
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- }
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-
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- return alac;
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-}
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-
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-/*---------------------------------------------------------------------------*/
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-rtp_resp_t rtp_init(struct in_addr host, int latency, char *aeskey, char *aesiv, char *fmtpstr,
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- short unsigned pCtrlPort, short unsigned pTimingPort,
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- raop_cmd_cb_t cmd_cb, raop_data_cb_t data_cb)
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-{
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- int i = 0;
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- char *arg;
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- int fmtp[12];
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- bool rc = true;
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- rtp_t *ctx = calloc(1, sizeof(rtp_t));
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- rtp_resp_t resp = { 0, 0, 0, NULL };
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-
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- if (!ctx) return resp;
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-
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- ctx->host = host;
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- ctx->decrypt = false;
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- ctx->cmd_cb = cmd_cb;
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- ctx->data_cb = data_cb;
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- ctx->rtp_host.sin_family = AF_INET;
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- ctx->rtp_host.sin_addr.s_addr = INADDR_ANY;
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- pthread_mutex_init(&ctx->ab_mutex, 0);
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- ctx->flush_seqno = -1;
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- ctx->latency = latency;
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- ctx->ab_read = ctx->ab_write;
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-
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-#ifdef __RTP_STORE
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- ctx->rtpIN = fopen("airplay.rtpin", "wb");
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- ctx->rtpOUT = fopen("airplay.rtpout", "wb");
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-#endif
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-
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- ctx->rtp_sockets[CONTROL].rport = pCtrlPort;
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- ctx->rtp_sockets[TIMING].rport = pTimingPort;
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-
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- if (aesiv && aeskey) {
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- memcpy(ctx->aesiv, aesiv, 16);
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-#ifdef WIN32
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- AES_set_decrypt_key((unsigned char*) aeskey, 128, &ctx->aes);
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-#else
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- memset(&ctx->aes, 0, sizeof(mbedtls_aes_context));
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- mbedtls_aes_setkey_dec(&ctx->aes, (unsigned char*) aeskey, 128);
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-#endif
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- ctx->decrypt = true;
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- ctx->decrypt_buf = malloc(MAX_PACKET);
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- }
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-
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- memset(fmtp, 0, sizeof(fmtp));
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- while ((arg = strsep(&fmtpstr, " \t")) != NULL) fmtp[i++] = atoi(arg);
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-
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- ctx->frame_size = fmtp[1];
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- ctx->frame_duration = (ctx->frame_size * 1000) / RAOP_SAMPLE_RATE;
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-
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- // alac decoder
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- ctx->alac_codec = alac_init(fmtp);
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- rc &= ctx->alac_codec != NULL;
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-
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- buffer_alloc(ctx->audio_buffer, ctx->frame_size*4);
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-
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- // create rtp ports
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- for (i = 0; i < 3; i++) {
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- ctx->rtp_sockets[i].sock = bind_socket(&ctx->rtp_sockets[i].lport, SOCK_DGRAM);
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- rc &= ctx->rtp_sockets[i].sock > 0;
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- }
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-
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- // create http port and start listening
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- resp.cport = ctx->rtp_sockets[CONTROL].lport;
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- resp.tport = ctx->rtp_sockets[TIMING].lport;
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- resp.aport = ctx->rtp_sockets[DATA].lport;
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-
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- if (rc) {
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- ctx->running = true;
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-#ifdef WIN32
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- pthread_create(&ctx->thread, NULL, rtp_thread_func, (void *) ctx);
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-#else
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- // xTaskCreate((TaskFunction_t) rtp_thread_func, "RTP_thread", RTP_TASK_SIZE, ctx, CONFIG_ESP32_PTHREAD_TASK_PRIO_DEFAULT + 1 , &ctx->thread);
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- ctx->xTaskBuffer = (StaticTask_t*) heap_caps_malloc(sizeof(StaticTask_t), MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
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- ctx->xStack = (StackType_t*) malloc(RTP_STACK_SIZE);
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- ctx->thread = xTaskCreateStatic( (TaskFunction_t) rtp_thread_func, "RTP_thread", RTP_STACK_SIZE, ctx,
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- CONFIG_ESP32_PTHREAD_TASK_PRIO_DEFAULT + 1, ctx->xStack, ctx->xTaskBuffer );
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-#endif
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- } else {
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- rtp_end(ctx);
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- ctx = NULL;
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- }
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-
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- resp.ctx = ctx;
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-
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- return resp;
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-}
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-
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-/*---------------------------------------------------------------------------*/
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-void rtp_end(rtp_t *ctx)
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-{
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- int i;
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-
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- if (!ctx) return;
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-
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- if (ctx->running) {
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-#if !defined WIN32
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- ctx->joiner = xTaskGetCurrentTaskHandle();
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-#endif
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- ctx->running = false;
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-#ifdef WIN32
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- pthread_join(ctx->thread, NULL);
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-#else
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- xTaskNotifyWait(0, 0, NULL, portMAX_DELAY);
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- free(ctx->xStack);
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- heap_caps_free(ctx->xTaskBuffer);
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-#endif
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- }
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-
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- for (i = 0; i < 3; i++) closesocket(ctx->rtp_sockets[i].sock);
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-
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- if (ctx->alac_codec) alac_delete_decoder(ctx->alac_codec);
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- if (ctx->decrypt_buf) free(ctx->decrypt_buf);
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-
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- pthread_mutex_destroy(&ctx->ab_mutex);
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- buffer_release(ctx->audio_buffer);
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-
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- free(ctx);
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-
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-#ifdef __RTP_STORE
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- fclose(ctx->rtpIN);
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- fclose(ctx->rtpOUT);
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-#endif
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-}
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-
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-/*---------------------------------------------------------------------------*/
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-bool rtp_flush(rtp_t *ctx, unsigned short seqno, unsigned int rtptime)
|
|
|
-{
|
|
|
- bool rc = true;
|
|
|
- u32_t now = gettime_ms();
|
|
|
-
|
|
|
- if (now < ctx->record.time + 250 || (ctx->record.seqno == seqno && ctx->record.rtptime == rtptime)) {
|
|
|
- rc = false;
|
|
|
- LOG_ERROR("[%p]: FLUSH ignored as same as RECORD (%hu - %u)", ctx, seqno, rtptime);
|
|
|
- } else {
|
|
|
- pthread_mutex_lock(&ctx->ab_mutex);
|
|
|
- buffer_reset(ctx->audio_buffer);
|
|
|
- ctx->playing = false;
|
|
|
- ctx->flush_seqno = seqno;
|
|
|
- pthread_mutex_unlock(&ctx->ab_mutex);
|
|
|
- }
|
|
|
-
|
|
|
- LOG_INFO("[%p]: flush %hu %u", ctx, seqno, rtptime);
|
|
|
-
|
|
|
- return rc;
|
|
|
-}
|
|
|
-
|
|
|
-/*---------------------------------------------------------------------------*/
|
|
|
-void rtp_record(rtp_t *ctx, unsigned short seqno, unsigned rtptime)
|
|
|
-{
|
|
|
- ctx->record.seqno = seqno;
|
|
|
- ctx->record.rtptime = rtptime;
|
|
|
- ctx->record.time = gettime_ms();
|
|
|
-
|
|
|
- LOG_INFO("[%p]: record %hu %u", ctx, seqno, rtptime);
|
|
|
-}
|
|
|
-
|
|
|
-/*---------------------------------------------------------------------------*/
|
|
|
-static void buffer_alloc(abuf_t *audio_buffer, int size) {
|
|
|
- int i;
|
|
|
- for (i = 0; i < BUFFER_FRAMES; i++) {
|
|
|
- audio_buffer[i].data = malloc(size);
|
|
|
- audio_buffer[i].ready = 0;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-/*---------------------------------------------------------------------------*/
|
|
|
-static void buffer_release(abuf_t *audio_buffer) {
|
|
|
- int i;
|
|
|
- for (i = 0; i < BUFFER_FRAMES; i++) {
|
|
|
- free(audio_buffer[i].data);
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-/*---------------------------------------------------------------------------*/
|
|
|
-static void buffer_reset(abuf_t *audio_buffer) {
|
|
|
- int i;
|
|
|
- for (i = 0; i < BUFFER_FRAMES; i++) audio_buffer[i].ready = 0;
|
|
|
-}
|
|
|
-
|
|
|
-/*---------------------------------------------------------------------------*/
|
|
|
-// the sequence numbers will wrap pretty often.
|
|
|
-// this returns true if the second arg is after the first
|
|
|
-static int seq_order(seq_t a, seq_t b) {
|
|
|
- s16_t d = b - a;
|
|
|
- return d > 0;
|
|
|
-}
|
|
|
-
|
|
|
-/*---------------------------------------------------------------------------*/
|
|
|
-static void alac_decode(rtp_t *ctx, s16_t *dest, char *buf, int len, int *outsize) {
|
|
|
- unsigned char iv[16];
|
|
|
- int aeslen;
|
|
|
- assert(len<=MAX_PACKET);
|
|
|
-
|
|
|
- if (ctx->decrypt) {
|
|
|
- aeslen = len & ~0xf;
|
|
|
- memcpy(iv, ctx->aesiv, sizeof(iv));
|
|
|
-#ifdef WIN32
|
|
|
- AES_cbc_encrypt((unsigned char*)buf, ctx->decrypt_buf, aeslen, &ctx->aes, iv, AES_DECRYPT);
|
|
|
-#else
|
|
|
- mbedtls_aes_crypt_cbc(&ctx->aes, MBEDTLS_AES_DECRYPT, aeslen, iv, (unsigned char*) buf, ctx->decrypt_buf);
|
|
|
-#endif
|
|
|
- memcpy(ctx->decrypt_buf+aeslen, buf+aeslen, len-aeslen);
|
|
|
- alac_to_pcm(ctx->alac_codec, (unsigned char*) ctx->decrypt_buf, (unsigned char*) dest, 2, (unsigned int*) outsize);
|
|
|
- } else {
|
|
|
- alac_to_pcm(ctx->alac_codec, (unsigned char*) buf, (unsigned char*) dest, 2, (unsigned int*) outsize);
|
|
|
- }
|
|
|
-
|
|
|
- *outsize *= 4;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*---------------------------------------------------------------------------*/
|
|
|
-static void buffer_put_packet(rtp_t *ctx, seq_t seqno, unsigned rtptime, bool first, char *data, int len) {
|
|
|
- abuf_t *abuf = NULL;
|
|
|
- u32_t playtime;
|
|
|
-
|
|
|
- pthread_mutex_lock(&ctx->ab_mutex);
|
|
|
-
|
|
|
- if (!ctx->playing) {
|
|
|
- if ((ctx->flush_seqno == -1 || seq_order(ctx->flush_seqno, seqno)) &&
|
|
|
- (ctx->synchro.status & RTP_SYNC) && (ctx->synchro.status & NTP_SYNC)) {
|
|
|
- ctx->ab_write = seqno-1;
|
|
|
- ctx->ab_read = seqno;
|
|
|
- ctx->flush_seqno = -1;
|
|
|
- ctx->playing = true;
|
|
|
- ctx->resent_req = ctx->resent_rec = ctx->silent_frames = ctx->discarded = 0;
|
|
|
- playtime = ctx->synchro.time + (((s32_t)(rtptime - ctx->synchro.rtp)) * 1000) / RAOP_SAMPLE_RATE;
|
|
|
- ctx->cmd_cb(RAOP_PLAY, &playtime);
|
|
|
- } else {
|
|
|
- pthread_mutex_unlock(&ctx->ab_mutex);
|
|
|
- return;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- if (seqno == (u16_t) (ctx->ab_write+1)) {
|
|
|
- // expected packet
|
|
|
- abuf = ctx->audio_buffer + BUFIDX(seqno);
|
|
|
- ctx->ab_write = seqno;
|
|
|
- LOG_SDEBUG("packet expected seqno:%hu rtptime:%u (W:%hu R:%hu)", seqno, rtptime, ctx->ab_write, ctx->ab_read);
|
|
|
-
|
|
|
- } else if (seq_order(ctx->ab_write, seqno)) {
|
|
|
- // newer than expected
|
|
|
- if (ctx->latency && seq_order(ctx->latency / ctx->frame_size, seqno - ctx->ab_write - 1)) {
|
|
|
- // only get rtp latency-1 frames back (last one is seqno)
|
|
|
- LOG_WARN("[%p] too many missing frames %hu seq: %hu, (W:%hu R:%hu)", ctx, seqno - ctx->ab_write - 1, seqno, ctx->ab_write, ctx->ab_read);
|
|
|
- ctx->ab_write = seqno - ctx->latency / ctx->frame_size;
|
|
|
- }
|
|
|
- if (ctx->latency && seq_order(ctx->latency / ctx->frame_size, seqno - ctx->ab_read)) {
|
|
|
- // if ab_read is lagging more than http latency, advance it
|
|
|
- LOG_WARN("[%p] on hold for too long %hu (W:%hu R:%hu)", ctx, seqno - ctx->ab_read + 1, ctx->ab_write, ctx->ab_read);
|
|
|
- ctx->ab_read = seqno - ctx->latency / ctx->frame_size + 1;
|
|
|
- }
|
|
|
- if (rtp_request_resend(ctx, ctx->ab_write + 1, seqno-1)) {
|
|
|
- seq_t i;
|
|
|
- u32_t now = gettime_ms();
|
|
|
- for (i = ctx->ab_write + 1; seq_order(i, seqno); i++) {
|
|
|
- ctx->audio_buffer[BUFIDX(i)].rtptime = rtptime - (seqno-i)*ctx->frame_size;
|
|
|
- ctx->audio_buffer[BUFIDX(i)].last_resend = now;
|
|
|
- }
|
|
|
- }
|
|
|
- LOG_DEBUG("[%p]: packet newer seqno:%hu rtptime:%u (W:%hu R:%hu)", ctx, seqno, rtptime, ctx->ab_write, ctx->ab_read);
|
|
|
- abuf = ctx->audio_buffer + BUFIDX(seqno);
|
|
|
- ctx->ab_write = seqno;
|
|
|
- } else if (seq_order(ctx->ab_read, seqno + 1)) {
|
|
|
- // recovered packet, not yet sent
|
|
|
- abuf = ctx->audio_buffer + BUFIDX(seqno);
|
|
|
- ctx->resent_rec++;
|
|
|
- LOG_DEBUG("[%p]: packet recovered seqno:%hu rtptime:%u (W:%hu R:%hu)", ctx, seqno, rtptime, ctx->ab_write, ctx->ab_read);
|
|
|
- } else {
|
|
|
- // too late
|
|
|
- LOG_DEBUG("[%p]: packet too late seqno:%hu rtptime:%u (W:%hu R:%hu)", ctx, seqno, rtptime, ctx->ab_write, ctx->ab_read);
|
|
|
- }
|
|
|
-
|
|
|
- if (ctx->in_frames++ > 1000) {
|
|
|
- LOG_INFO("[%p]: fill [level:%hu rec:%u] [W:%hu R:%hu]", ctx, ctx->ab_write - ctx->ab_read, ctx->resent_rec, ctx->ab_write, ctx->ab_read);
|
|
|
- ctx->in_frames = 0;
|
|
|
- }
|
|
|
-
|
|
|
- if (abuf) {
|
|
|
- alac_decode(ctx, abuf->data, data, len, &abuf->len);
|
|
|
- abuf->ready = 1;
|
|
|
- // this is the local rtptime when this frame is expected to play
|
|
|
- abuf->rtptime = rtptime;
|
|
|
- buffer_push_packet(ctx);
|
|
|
-
|
|
|
-#ifdef __RTP_STORE
|
|
|
- fwrite(data, len, 1, ctx->rtpIN);
|
|
|
- fwrite(abuf->data, abuf->len, 1, ctx->rtpOUT);
|
|
|
-#endif
|
|
|
- }
|
|
|
-
|
|
|
- pthread_mutex_unlock(&ctx->ab_mutex);
|
|
|
-}
|
|
|
-
|
|
|
-/*---------------------------------------------------------------------------*/
|
|
|
-// push as many frames as possible through callback
|
|
|
-static void buffer_push_packet(rtp_t *ctx) {
|
|
|
- abuf_t *curframe = NULL;
|
|
|
- u32_t now, playtime, hold = max((ctx->latency * 1000) / (8 * RAOP_SAMPLE_RATE), 100);
|
|
|
- int i;
|
|
|
-
|
|
|
- // not ready to play yet
|
|
|
- if (!ctx->playing || ctx->synchro.status != (RTP_SYNC | NTP_SYNC)) return;
|
|
|
-
|
|
|
- // maybe re-evaluate time in loop in case data callback blocks ...
|
|
|
- now = gettime_ms();
|
|
|
-
|
|
|
- // there is always at least one frame in the buffer
|
|
|
- do {
|
|
|
-
|
|
|
- curframe = ctx->audio_buffer + BUFIDX(ctx->ab_read);
|
|
|
- playtime = ctx->synchro.time + (((s32_t)(curframe->rtptime - ctx->synchro.rtp)) * 1000) / RAOP_SAMPLE_RATE;
|
|
|
-
|
|
|
- if (now > playtime) {
|
|
|
- LOG_DEBUG("[%p]: discarded frame now:%u missed by:%d (W:%hu R:%hu)", ctx, now, now - playtime, ctx->ab_write, ctx->ab_read);
|
|
|
- ctx->discarded++;
|
|
|
- curframe->ready = 0;
|
|
|
- } else if (curframe->ready) {
|
|
|
- ctx->data_cb((const u8_t*) curframe->data, curframe->len, playtime);
|
|
|
- curframe->ready = 0;
|
|
|
- } else if (playtime - now <= hold) {
|
|
|
- LOG_DEBUG("[%p]: created zero frame (W:%hu R:%hu)", ctx, ctx->ab_write, ctx->ab_read);
|
|
|
- ctx->data_cb(silence_frame, ctx->frame_size * 4, playtime);
|
|
|
- ctx->silent_frames++;
|
|
|
- } else break;
|
|
|
-
|
|
|
- ctx->ab_read++;
|
|
|
- ctx->out_frames++;
|
|
|
-
|
|
|
- } while (seq_order(ctx->ab_read, ctx->ab_write));
|
|
|
-
|
|
|
- if (ctx->out_frames > 1000) {
|
|
|
- LOG_INFO("[%p]: drain [level:%hd head:%d ms] [W:%hu R:%hu] [req:%u sil:%u dis:%u]",
|
|
|
- ctx, ctx->ab_write - ctx->ab_read, playtime - now, ctx->ab_write, ctx->ab_read,
|
|
|
- ctx->resent_req, ctx->silent_frames, ctx->discarded);
|
|
|
- ctx->out_frames = 0;
|
|
|
- }
|
|
|
-
|
|
|
- LOG_SDEBUG("playtime %u %d [W:%hu R:%hu] %d", playtime, playtime - now, ctx->ab_write, ctx->ab_read, curframe->ready);
|
|
|
-
|
|
|
- // each missing packet will be requested up to (latency_frames / 16) times
|
|
|
- for (i = 0; seq_order(ctx->ab_read + i, ctx->ab_write); i += 16) {
|
|
|
- abuf_t *frame = ctx->audio_buffer + BUFIDX(ctx->ab_read + i);
|
|
|
- if (!frame->ready && now - frame->last_resend > RESEND_TO) {
|
|
|
- rtp_request_resend(ctx, ctx->ab_read + i, ctx->ab_read + i);
|
|
|
+
static log_level *loglevel = &raop_loglevel;
|
|
|
+
|
|
|
+//#define __RTP_STORE
|
|
|
+
|
|
|
+// default buffer size
|
|
|
+#define BUFFER_FRAMES ( (150 * RAOP_SAMPLE_RATE * 2) / (352 * 100) )
|
|
|
+#define MAX_PACKET 1408
|
|
|
+#define MIN_LATENCY 11025
|
|
|
+#define MAX_LATENCY ( (120 * RAOP_SAMPLE_RATE * 2) / 100 )
|
|
|
+
|
|
|
+#define RTP_STACK_SIZE (4*1024)
|
|
|
+
|
|
|
+#define RTP_SYNC (0x01)
|
|
|
+#define NTP_SYNC (0x02)
|
|
|
+
|
|
|
+#define RESEND_TO 200
|
|
|
+
|
|
|
+enum { DATA = 0, CONTROL, TIMING };
|
|
|
+
|
|
|
+static const u8_t silence_frame[MAX_PACKET] = { 0 };
|
|
|
+
|
|
|
+typedef u16_t seq_t;
|
|
|
+typedef struct audio_buffer_entry { // decoded audio packets
|
|
|
+ int ready;
|
|
|
+ u32_t rtptime, last_resend;
|
|
|
+ s16_t *data;
|
|
|
+ int len;
|
|
|
+} abuf_t;
|
|
|
+
|
|
|
+typedef struct rtp_s {
|
|
|
+#ifdef __RTP_STORE
|
|
|
+ FILE *rtpIN, *rtpOUT;
|
|
|
+#endif
|
|
|
+ bool running;
|
|
|
+ unsigned char aesiv[16];
|
|
|
+#ifdef WIN32
|
|
|
+ AES_KEY aes;
|
|
|
+#else
|
|
|
+ mbedtls_aes_context aes;
|
|
|
+#endif
|
|
|
+ bool decrypt;
|
|
|
+ u8_t *decrypt_buf;
|
|
|
+ u32_t frame_size, frame_duration;
|
|
|
+ u32_t in_frames, out_frames;
|
|
|
+ struct in_addr host;
|
|
|
+ struct sockaddr_in rtp_host;
|
|
|
+ struct {
|
|
|
+ unsigned short rport, lport;
|
|
|
+ int sock;
|
|
|
+ } rtp_sockets[3]; // data, control, timing
|
|
|
+ struct timing_s {
|
|
|
+ u64_t local, remote;
|
|
|
+ } timing;
|
|
|
+ struct {
|
|
|
+ u32_t rtp, time;
|
|
|
+ u8_t status;
|
|
|
+ } synchro;
|
|
|
+ struct {
|
|
|
+ u32_t time;
|
|
|
+ seq_t seqno;
|
|
|
+ u32_t rtptime;
|
|
|
+ } record;
|
|
|
+ int latency; // rtp hold depth in samples
|
|
|
+ u32_t resent_req, resent_rec; // total resent + recovered frames
|
|
|
+ u32_t silent_frames; // total silence frames
|
|
|
+ u32_t discarded;
|
|
|
+ abuf_t audio_buffer[BUFFER_FRAMES];
|
|
|
+ seq_t ab_read, ab_write;
|
|
|
+ pthread_mutex_t ab_mutex;
|
|
|
+#ifdef WIN32
|
|
|
+ pthread_t thread;
|
|
|
+#else
|
|
|
+ TaskHandle_t thread, joiner;
|
|
|
+ StaticTask_t *xTaskBuffer;
|
|
|
+ StackType_t *xStack;
|
|
|
+#endif
|
|
|
+
|
|
|
+ struct alac_codec_s *alac_codec;
|
|
|
+ int flush_seqno;
|
|
|
+ bool playing;
|
|
|
+ raop_data_cb_t data_cb;
|
|
|
+ raop_cmd_cb_t cmd_cb;
|
|
|
+} rtp_t;
|
|
|
+
|
|
|
+
|
|
|
+#define BUFIDX(seqno) ((seq_t)(seqno) % BUFFER_FRAMES)
|
|
|
+static void buffer_alloc(abuf_t *audio_buffer, int size);
|
|
|
+static void buffer_release(abuf_t *audio_buffer);
|
|
|
+static void buffer_reset(abuf_t *audio_buffer);
|
|
|
+static void buffer_push_packet(rtp_t *ctx);
|
|
|
+static bool rtp_request_resend(rtp_t *ctx, seq_t first, seq_t last);
|
|
|
+static bool rtp_request_timing(rtp_t *ctx);
|
|
|
+static void* rtp_thread_func(void *arg);
|
|
|
+static int seq_order(seq_t a, seq_t b);
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+static struct alac_codec_s* alac_init(int fmtp[32]) {
|
|
|
+ struct alac_codec_s *alac;
|
|
|
+ unsigned sample_rate;
|
|
|
+ unsigned char sample_size, channels;
|
|
|
+ struct {
|
|
|
+ uint32_t frameLength;
|
|
|
+ uint8_t compatibleVersion;
|
|
|
+ uint8_t bitDepth;
|
|
|
+ uint8_t pb;
|
|
|
+ uint8_t mb;
|
|
|
+ uint8_t kb;
|
|
|
+ uint8_t numChannels;
|
|
|
+ uint16_t maxRun;
|
|
|
+ uint32_t maxFrameBytes;
|
|
|
+ uint32_t avgBitRate;
|
|
|
+ uint32_t sampleRate;
|
|
|
+ } config;
|
|
|
+
|
|
|
+ config.frameLength = htonl(fmtp[1]);
|
|
|
+ config.compatibleVersion = fmtp[2];
|
|
|
+ config.bitDepth = fmtp[3];
|
|
|
+ config.pb = fmtp[4];
|
|
|
+ config.mb = fmtp[5];
|
|
|
+ config.kb = fmtp[6];
|
|
|
+ config.numChannels = fmtp[7];
|
|
|
+ config.maxRun = htons(fmtp[8]);
|
|
|
+ config.maxFrameBytes = htonl(fmtp[9]);
|
|
|
+ config.avgBitRate = htonl(fmtp[10]);
|
|
|
+ config.sampleRate = htonl(fmtp[11]);
|
|
|
+
|
|
|
+ alac = alac_create_decoder(sizeof(config), (unsigned char*) &config, &sample_size, &sample_rate, &channels);
|
|
|
+ if (!alac) {
|
|
|
+ LOG_ERROR("cannot create alac codec", NULL);
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ return alac;
|
|
|
+}
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+rtp_resp_t rtp_init(struct in_addr host, int latency, char *aeskey, char *aesiv, char *fmtpstr,
|
|
|
+ short unsigned pCtrlPort, short unsigned pTimingPort,
|
|
|
+ raop_cmd_cb_t cmd_cb, raop_data_cb_t data_cb)
|
|
|
+{
|
|
|
+ int i = 0;
|
|
|
+ char *arg;
|
|
|
+ int fmtp[12];
|
|
|
+ bool rc = true;
|
|
|
+ rtp_t *ctx = calloc(1, sizeof(rtp_t));
|
|
|
+ rtp_resp_t resp = { 0, 0, 0, NULL };
|
|
|
+
|
|
|
+ if (!ctx) return resp;
|
|
|
+
|
|
|
+ ctx->host = host;
|
|
|
+ ctx->decrypt = false;
|
|
|
+ ctx->cmd_cb = cmd_cb;
|
|
|
+ ctx->data_cb = data_cb;
|
|
|
+ ctx->rtp_host.sin_family = AF_INET;
|
|
|
+ ctx->rtp_host.sin_addr.s_addr = INADDR_ANY;
|
|
|
+ pthread_mutex_init(&ctx->ab_mutex, 0);
|
|
|
+ ctx->flush_seqno = -1;
|
|
|
+ ctx->latency = latency;
|
|
|
+ ctx->ab_read = ctx->ab_write;
|
|
|
+
|
|
|
+#ifdef __RTP_STORE
|
|
|
+ ctx->rtpIN = fopen("airplay.rtpin", "wb");
|
|
|
+ ctx->rtpOUT = fopen("airplay.rtpout", "wb");
|
|
|
+#endif
|
|
|
+
|
|
|
+ ctx->rtp_sockets[CONTROL].rport = pCtrlPort;
|
|
|
+ ctx->rtp_sockets[TIMING].rport = pTimingPort;
|
|
|
+
|
|
|
+ if (aesiv && aeskey) {
|
|
|
+ memcpy(ctx->aesiv, aesiv, 16);
|
|
|
+#ifdef WIN32
|
|
|
+ AES_set_decrypt_key((unsigned char*) aeskey, 128, &ctx->aes);
|
|
|
+#else
|
|
|
+ memset(&ctx->aes, 0, sizeof(mbedtls_aes_context));
|
|
|
+ mbedtls_aes_setkey_dec(&ctx->aes, (unsigned char*) aeskey, 128);
|
|
|
+#endif
|
|
|
+ ctx->decrypt = true;
|
|
|
+ ctx->decrypt_buf = malloc(MAX_PACKET);
|
|
|
+ }
|
|
|
+
|
|
|
+ memset(fmtp, 0, sizeof(fmtp));
|
|
|
+ while ((arg = strsep(&fmtpstr, " \t")) != NULL) fmtp[i++] = atoi(arg);
|
|
|
+
|
|
|
+ ctx->frame_size = fmtp[1];
|
|
|
+ ctx->frame_duration = (ctx->frame_size * 1000) / RAOP_SAMPLE_RATE;
|
|
|
+
|
|
|
+ // alac decoder
|
|
|
+ ctx->alac_codec = alac_init(fmtp);
|
|
|
+ rc &= ctx->alac_codec != NULL;
|
|
|
+
|
|
|
+ buffer_alloc(ctx->audio_buffer, ctx->frame_size*4);
|
|
|
+
|
|
|
+ // create rtp ports
|
|
|
+ for (i = 0; i < 3; i++) {
|
|
|
+ ctx->rtp_sockets[i].sock = bind_socket(&ctx->rtp_sockets[i].lport, SOCK_DGRAM);
|
|
|
+ rc &= ctx->rtp_sockets[i].sock > 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ // create http port and start listening
|
|
|
+ resp.cport = ctx->rtp_sockets[CONTROL].lport;
|
|
|
+ resp.tport = ctx->rtp_sockets[TIMING].lport;
|
|
|
+ resp.aport = ctx->rtp_sockets[DATA].lport;
|
|
|
+
|
|
|
+ if (rc) {
|
|
|
+ ctx->running = true;
|
|
|
+#ifdef WIN32
|
|
|
+ pthread_create(&ctx->thread, NULL, rtp_thread_func, (void *) ctx);
|
|
|
+#else
|
|
|
+ // xTaskCreate((TaskFunction_t) rtp_thread_func, "RTP_thread", RTP_TASK_SIZE, ctx, CONFIG_ESP32_PTHREAD_TASK_PRIO_DEFAULT + 1 , &ctx->thread);
|
|
|
+ ctx->xTaskBuffer = (StaticTask_t*) heap_caps_malloc(sizeof(StaticTask_t), MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
|
|
|
+ ctx->xStack = (StackType_t*) malloc(RTP_STACK_SIZE);
|
|
|
+ ctx->thread = xTaskCreateStatic( (TaskFunction_t) rtp_thread_func, "RTP_thread", RTP_STACK_SIZE, ctx,
|
|
|
+ CONFIG_ESP32_PTHREAD_TASK_PRIO_DEFAULT + 1, ctx->xStack, ctx->xTaskBuffer );
|
|
|
+#endif
|
|
|
+ } else {
|
|
|
+ rtp_end(ctx);
|
|
|
+ ctx = NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ resp.ctx = ctx;
|
|
|
+
|
|
|
+ return resp;
|
|
|
+}
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+void rtp_end(rtp_t *ctx)
|
|
|
+{
|
|
|
+ int i;
|
|
|
+
|
|
|
+ if (!ctx) return;
|
|
|
+
|
|
|
+ if (ctx->running) {
|
|
|
+#if !defined WIN32
|
|
|
+ ctx->joiner = xTaskGetCurrentTaskHandle();
|
|
|
+#endif
|
|
|
+ ctx->running = false;
|
|
|
+#ifdef WIN32
|
|
|
+ pthread_join(ctx->thread, NULL);
|
|
|
+#else
|
|
|
+ xTaskNotifyWait(0, 0, NULL, portMAX_DELAY);
|
|
|
+ free(ctx->xStack);
|
|
|
+ heap_caps_free(ctx->xTaskBuffer);
|
|
|
+#endif
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < 3; i++) closesocket(ctx->rtp_sockets[i].sock);
|
|
|
+
|
|
|
+ if (ctx->alac_codec) alac_delete_decoder(ctx->alac_codec);
|
|
|
+ if (ctx->decrypt_buf) free(ctx->decrypt_buf);
|
|
|
+
|
|
|
+ pthread_mutex_destroy(&ctx->ab_mutex);
|
|
|
+ buffer_release(ctx->audio_buffer);
|
|
|
+
|
|
|
+ free(ctx);
|
|
|
+
|
|
|
+#ifdef __RTP_STORE
|
|
|
+ fclose(ctx->rtpIN);
|
|
|
+ fclose(ctx->rtpOUT);
|
|
|
+#endif
|
|
|
+}
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+bool rtp_flush(rtp_t *ctx, unsigned short seqno, unsigned int rtptime)
|
|
|
+{
|
|
|
+ bool rc = true;
|
|
|
+ u32_t now = gettime_ms();
|
|
|
+
|
|
|
+ if (now < ctx->record.time + 250 || (ctx->record.seqno == seqno && ctx->record.rtptime == rtptime)) {
|
|
|
+ rc = false;
|
|
|
+ LOG_ERROR("[%p]: FLUSH ignored as same as RECORD (%hu - %u)", ctx, seqno, rtptime);
|
|
|
+ } else {
|
|
|
+ pthread_mutex_lock(&ctx->ab_mutex);
|
|
|
+ buffer_reset(ctx->audio_buffer);
|
|
|
+ ctx->playing = false;
|
|
|
+ ctx->flush_seqno = seqno;
|
|
|
+ pthread_mutex_unlock(&ctx->ab_mutex);
|
|
|
+ }
|
|
|
+
|
|
|
+ LOG_INFO("[%p]: flush %hu %u", ctx, seqno, rtptime);
|
|
|
+
|
|
|
+ return rc;
|
|
|
+}
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+void rtp_record(rtp_t *ctx, unsigned short seqno, unsigned rtptime)
|
|
|
+{
|
|
|
+ ctx->record.seqno = seqno;
|
|
|
+ ctx->record.rtptime = rtptime;
|
|
|
+ ctx->record.time = gettime_ms();
|
|
|
+
|
|
|
+ LOG_INFO("[%p]: record %hu %u", ctx, seqno, rtptime);
|
|
|
+}
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+static void buffer_alloc(abuf_t *audio_buffer, int size) {
|
|
|
+ int i;
|
|
|
+ for (i = 0; i < BUFFER_FRAMES; i++) {
|
|
|
+ audio_buffer[i].data = malloc(size);
|
|
|
+ audio_buffer[i].ready = 0;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+static void buffer_release(abuf_t *audio_buffer) {
|
|
|
+ int i;
|
|
|
+ for (i = 0; i < BUFFER_FRAMES; i++) {
|
|
|
+ free(audio_buffer[i].data);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+static void buffer_reset(abuf_t *audio_buffer) {
|
|
|
+ int i;
|
|
|
+ for (i = 0; i < BUFFER_FRAMES; i++) audio_buffer[i].ready = 0;
|
|
|
+}
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+// the sequence numbers will wrap pretty often.
|
|
|
+// this returns true if the second arg is after the first
|
|
|
+static int seq_order(seq_t a, seq_t b) {
|
|
|
+ s16_t d = b - a;
|
|
|
+ return d > 0;
|
|
|
+}
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+static void alac_decode(rtp_t *ctx, s16_t *dest, char *buf, int len, int *outsize) {
|
|
|
+ unsigned char iv[16];
|
|
|
+ int aeslen;
|
|
|
+ assert(len<=MAX_PACKET);
|
|
|
+
|
|
|
+ if (ctx->decrypt) {
|
|
|
+ aeslen = len & ~0xf;
|
|
|
+ memcpy(iv, ctx->aesiv, sizeof(iv));
|
|
|
+#ifdef WIN32
|
|
|
+ AES_cbc_encrypt((unsigned char*)buf, ctx->decrypt_buf, aeslen, &ctx->aes, iv, AES_DECRYPT);
|
|
|
+#else
|
|
|
+ mbedtls_aes_crypt_cbc(&ctx->aes, MBEDTLS_AES_DECRYPT, aeslen, iv, (unsigned char*) buf, ctx->decrypt_buf);
|
|
|
+#endif
|
|
|
+ memcpy(ctx->decrypt_buf+aeslen, buf+aeslen, len-aeslen);
|
|
|
+ alac_to_pcm(ctx->alac_codec, (unsigned char*) ctx->decrypt_buf, (unsigned char*) dest, 2, (unsigned int*) outsize);
|
|
|
+ } else {
|
|
|
+ alac_to_pcm(ctx->alac_codec, (unsigned char*) buf, (unsigned char*) dest, 2, (unsigned int*) outsize);
|
|
|
+ }
|
|
|
+
|
|
|
+ *outsize *= 4;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+static void buffer_put_packet(rtp_t *ctx, seq_t seqno, unsigned rtptime, bool first, char *data, int len) {
|
|
|
+ abuf_t *abuf = NULL;
|
|
|
+ u32_t playtime;
|
|
|
+
|
|
|
+ pthread_mutex_lock(&ctx->ab_mutex);
|
|
|
+
|
|
|
+ if (!ctx->playing) {
|
|
|
+ if ((ctx->flush_seqno == -1 || seq_order(ctx->flush_seqno, seqno)) &&
|
|
|
+ (ctx->synchro.status & RTP_SYNC) && (ctx->synchro.status & NTP_SYNC)) {
|
|
|
+ ctx->ab_write = seqno-1;
|
|
|
+ ctx->ab_read = seqno;
|
|
|
+ ctx->flush_seqno = -1;
|
|
|
+ ctx->playing = true;
|
|
|
+ ctx->resent_req = ctx->resent_rec = ctx->silent_frames = ctx->discarded = 0;
|
|
|
+ playtime = ctx->synchro.time + (((s32_t)(rtptime - ctx->synchro.rtp)) * 1000) / RAOP_SAMPLE_RATE;
|
|
|
+ ctx->cmd_cb(RAOP_PLAY, &playtime);
|
|
|
+ } else {
|
|
|
+ pthread_mutex_unlock(&ctx->ab_mutex);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (seqno == (u16_t) (ctx->ab_write+1)) {
|
|
|
+ // expected packet
|
|
|
+ abuf = ctx->audio_buffer + BUFIDX(seqno);
|
|
|
+ ctx->ab_write = seqno;
|
|
|
+ LOG_SDEBUG("packet expected seqno:%hu rtptime:%u (W:%hu R:%hu)", seqno, rtptime, ctx->ab_write, ctx->ab_read);
|
|
|
+
|
|
|
+ } else if (seq_order(ctx->ab_write, seqno)) {
|
|
|
+ // newer than expected
|
|
|
+ if (ctx->latency && seq_order(ctx->latency / ctx->frame_size, seqno - ctx->ab_write - 1)) {
|
|
|
+ // only get rtp latency-1 frames back (last one is seqno)
|
|
|
+ LOG_WARN("[%p] too many missing frames %hu seq: %hu, (W:%hu R:%hu)", ctx, seqno - ctx->ab_write - 1, seqno, ctx->ab_write, ctx->ab_read);
|
|
|
+ ctx->ab_write = seqno - ctx->latency / ctx->frame_size;
|
|
|
+ }
|
|
|
+ if (ctx->latency && seq_order(ctx->latency / ctx->frame_size, seqno - ctx->ab_read)) {
|
|
|
+ // if ab_read is lagging more than http latency, advance it
|
|
|
+ LOG_WARN("[%p] on hold for too long %hu (W:%hu R:%hu)", ctx, seqno - ctx->ab_read + 1, ctx->ab_write, ctx->ab_read);
|
|
|
+ ctx->ab_read = seqno - ctx->latency / ctx->frame_size + 1;
|
|
|
+ }
|
|
|
+ if (rtp_request_resend(ctx, ctx->ab_write + 1, seqno-1)) {
|
|
|
+ seq_t i;
|
|
|
+ u32_t now = gettime_ms();
|
|
|
+ for (i = ctx->ab_write + 1; seq_order(i, seqno); i++) {
|
|
|
+ ctx->audio_buffer[BUFIDX(i)].rtptime = rtptime - (seqno-i)*ctx->frame_size;
|
|
|
+ ctx->audio_buffer[BUFIDX(i)].last_resend = now;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ LOG_DEBUG("[%p]: packet newer seqno:%hu rtptime:%u (W:%hu R:%hu)", ctx, seqno, rtptime, ctx->ab_write, ctx->ab_read);
|
|
|
+ abuf = ctx->audio_buffer + BUFIDX(seqno);
|
|
|
+ ctx->ab_write = seqno;
|
|
|
+ } else if (seq_order(ctx->ab_read, seqno + 1)) {
|
|
|
+ // recovered packet, not yet sent
|
|
|
+ abuf = ctx->audio_buffer + BUFIDX(seqno);
|
|
|
+ ctx->resent_rec++;
|
|
|
+ LOG_DEBUG("[%p]: packet recovered seqno:%hu rtptime:%u (W:%hu R:%hu)", ctx, seqno, rtptime, ctx->ab_write, ctx->ab_read);
|
|
|
+ } else {
|
|
|
+ // too late
|
|
|
+ LOG_DEBUG("[%p]: packet too late seqno:%hu rtptime:%u (W:%hu R:%hu)", ctx, seqno, rtptime, ctx->ab_write, ctx->ab_read);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (ctx->in_frames++ > 1000) {
|
|
|
+ LOG_INFO("[%p]: fill [level:%hu rec:%u] [W:%hu R:%hu]", ctx, ctx->ab_write - ctx->ab_read, ctx->resent_rec, ctx->ab_write, ctx->ab_read);
|
|
|
+ ctx->in_frames = 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (abuf) {
|
|
|
+ alac_decode(ctx, abuf->data, data, len, &abuf->len);
|
|
|
+ abuf->ready = 1;
|
|
|
+ // this is the local rtptime when this frame is expected to play
|
|
|
+ abuf->rtptime = rtptime;
|
|
|
+ buffer_push_packet(ctx);
|
|
|
+
|
|
|
+#ifdef __RTP_STORE
|
|
|
+ fwrite(data, len, 1, ctx->rtpIN);
|
|
|
+ fwrite(abuf->data, abuf->len, 1, ctx->rtpOUT);
|
|
|
+#endif
|
|
|
+ }
|
|
|
+
|
|
|
+ pthread_mutex_unlock(&ctx->ab_mutex);
|
|
|
+}
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+// push as many frames as possible through callback
|
|
|
+static void buffer_push_packet(rtp_t *ctx) {
|
|
|
+ abuf_t *curframe = NULL;
|
|
|
+ u32_t now, playtime, hold = max((ctx->latency * 1000) / (8 * RAOP_SAMPLE_RATE), 100);
|
|
|
+ int i;
|
|
|
+
|
|
|
+ // not ready to play yet
|
|
|
+ if (!ctx->playing || ctx->synchro.status != (RTP_SYNC | NTP_SYNC)) return;
|
|
|
+
|
|
|
+ // maybe re-evaluate time in loop in case data callback blocks ...
|
|
|
+ now = gettime_ms();
|
|
|
+
|
|
|
+ // there is always at least one frame in the buffer
|
|
|
+ do {
|
|
|
+
|
|
|
+ curframe = ctx->audio_buffer + BUFIDX(ctx->ab_read);
|
|
|
+ playtime = ctx->synchro.time + (((s32_t)(curframe->rtptime - ctx->synchro.rtp)) * 1000) / RAOP_SAMPLE_RATE;
|
|
|
+
|
|
|
+ if (now > playtime) {
|
|
|
+ LOG_DEBUG("[%p]: discarded frame now:%u missed by:%d (W:%hu R:%hu)", ctx, now, now - playtime, ctx->ab_write, ctx->ab_read);
|
|
|
+ ctx->discarded++;
|
|
|
+ curframe->ready = 0;
|
|
|
+ } else if (curframe->ready) {
|
|
|
+ ctx->data_cb((const u8_t*) curframe->data, curframe->len, playtime);
|
|
|
+ curframe->ready = 0;
|
|
|
+ } else if (playtime - now <= hold) {
|
|
|
+ LOG_DEBUG("[%p]: created zero frame (W:%hu R:%hu)", ctx, ctx->ab_write, ctx->ab_read);
|
|
|
+ ctx->data_cb(silence_frame, ctx->frame_size * 4, playtime);
|
|
|
+ ctx->silent_frames++;
|
|
|
+ } else break;
|
|
|
+
|
|
|
+ ctx->ab_read++;
|
|
|
+ ctx->out_frames++;
|
|
|
+
|
|
|
+ } while (seq_order(ctx->ab_read, ctx->ab_write));
|
|
|
+
|
|
|
+ if (ctx->out_frames > 1000) {
|
|
|
+ LOG_INFO("[%p]: drain [level:%hd head:%d ms] [W:%hu R:%hu] [req:%u sil:%u dis:%u]",
|
|
|
+ ctx, ctx->ab_write - ctx->ab_read, playtime - now, ctx->ab_write, ctx->ab_read,
|
|
|
+ ctx->resent_req, ctx->silent_frames, ctx->discarded);
|
|
|
+ ctx->out_frames = 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ LOG_SDEBUG("playtime %u %d [W:%hu R:%hu] %d", playtime, playtime - now, ctx->ab_write, ctx->ab_read, curframe->ready);
|
|
|
+
|
|
|
+ // each missing packet will be requested up to (latency_frames / 16) times
|
|
|
+ for (i = 0; seq_order(ctx->ab_read + i, ctx->ab_write); i += 16) {
|
|
|
+ abuf_t *frame = ctx->audio_buffer + BUFIDX(ctx->ab_read + i);
|
|
|
+ if (!frame->ready && now - frame->last_resend > RESEND_TO) {
|
|
|
+ rtp_request_resend(ctx, ctx->ab_read + i, ctx->ab_read + i);
|
|
|
frame->last_resend = now;
|
|
|
}
|
|
|
- }
|
|
|
+ }
|
|
|
}
|
|
|
-
|
|
|
-
|
|
|
-/*---------------------------------------------------------------------------*/
|
|
|
-static void *rtp_thread_func(void *arg) {
|
|
|
- fd_set fds;
|
|
|
- int i, sock = -1;
|
|
|
- int count = 0;
|
|
|
- bool ntp_sent;
|
|
|
- char *packet = malloc(MAX_PACKET);
|
|
|
- rtp_t *ctx = (rtp_t*) arg;
|
|
|
-
|
|
|
- for (i = 0; i < 3; i++) {
|
|
|
- if (ctx->rtp_sockets[i].sock > sock) sock = ctx->rtp_sockets[i].sock;
|
|
|
- // send synchro requets 3 times
|
|
|
- ntp_sent = rtp_request_timing(ctx);
|
|
|
- }
|
|
|
-
|
|
|
- while (ctx->running) {
|
|
|
- ssize_t plen;
|
|
|
- char type;
|
|
|
- socklen_t rtp_client_len = sizeof(struct sockaddr_storage);
|
|
|
- int idx = 0;
|
|
|
- char *pktp = packet;
|
|
|
- struct timeval timeout = {0, 100*1000};
|
|
|
-
|
|
|
- FD_ZERO(&fds);
|
|
|
- for (i = 0; i < 3; i++) { FD_SET(ctx->rtp_sockets[i].sock, &fds); }
|
|
|
-
|
|
|
- if (select(sock + 1, &fds, NULL, NULL, &timeout) <= 0) continue;
|
|
|
-
|
|
|
- for (i = 0; i < 3; i++)
|
|
|
- if (FD_ISSET(ctx->rtp_sockets[i].sock, &fds)) idx = i;
|
|
|
-
|
|
|
- plen = recvfrom(ctx->rtp_sockets[idx].sock, packet, MAX_PACKET, 0, (struct sockaddr*) &ctx->rtp_host, &rtp_client_len);
|
|
|
-
|
|
|
- if (!ntp_sent) {
|
|
|
- LOG_WARN("[%p]: NTP request not send yet", ctx);
|
|
|
- ntp_sent = rtp_request_timing(ctx);
|
|
|
- }
|
|
|
-
|
|
|
- if (plen < 0) continue;
|
|
|
- assert(plen <= MAX_PACKET);
|
|
|
-
|
|
|
- type = packet[1] & ~0x80;
|
|
|
- pktp = packet;
|
|
|
-
|
|
|
- switch (type) {
|
|
|
- seq_t seqno;
|
|
|
- unsigned rtptime;
|
|
|
-
|
|
|
- // re-sent packet
|
|
|
- case 0x56: {
|
|
|
- pktp += 4;
|
|
|
- plen -= 4;
|
|
|
- }
|
|
|
-
|
|
|
- // data packet
|
|
|
- case 0x60: {
|
|
|
- seqno = ntohs(*(u16_t*)(pktp+2));
|
|
|
- rtptime = ntohl(*(u32_t*)(pktp+4));
|
|
|
-
|
|
|
- // adjust pointer and length
|
|
|
- pktp += 12;
|
|
|
- plen -= 12;
|
|
|
-
|
|
|
- LOG_SDEBUG("[%p]: seqno:%hu rtp:%u (type: %x, first: %u)", ctx, seqno, rtptime, type, packet[1] & 0x80);
|
|
|
-
|
|
|
- // check if packet contains enough content to be reasonable
|
|
|
- if (plen < 16) break;
|
|
|
-
|
|
|
- if ((packet[1] & 0x80) && (type != 0x56)) {
|
|
|
- LOG_INFO("[%p]: 1st audio packet received", ctx);
|
|
|
- }
|
|
|
-
|
|
|
- buffer_put_packet(ctx, seqno, rtptime, packet[1] & 0x80, pktp, plen);
|
|
|
-
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- // sync packet
|
|
|
- case 0x54: {
|
|
|
- u32_t rtp_now_latency = ntohl(*(u32_t*)(pktp+4));
|
|
|
- u64_t remote = (((u64_t) ntohl(*(u32_t*)(pktp+8))) << 32) + ntohl(*(u32_t*)(pktp+12));
|
|
|
- u32_t rtp_now = ntohl(*(u32_t*)(pktp+16));
|
|
|
- u16_t flags = ntohs(*(u16_t*)(pktp+2));
|
|
|
-
|
|
|
- pthread_mutex_lock(&ctx->ab_mutex);
|
|
|
-
|
|
|
- // re-align timestamp and expected local playback time (and magic 11025 latency)
|
|
|
- ctx->latency = rtp_now - rtp_now_latency;
|
|
|
- if (flags == 7 || flags == 4) ctx->latency += 11025;
|
|
|
- if (ctx->latency < MIN_LATENCY) ctx->latency = MIN_LATENCY;
|
|
|
- else if (ctx->latency > MAX_LATENCY) ctx->latency = MAX_LATENCY;
|
|
|
- ctx->synchro.rtp = rtp_now - ctx->latency;
|
|
|
- ctx->synchro.time = ctx->timing.local + (u32_t) NTP2MS(remote - ctx->timing.remote);
|
|
|
-
|
|
|
- // now we are synced on RTP frames
|
|
|
- ctx->synchro.status |= RTP_SYNC;
|
|
|
-
|
|
|
- // 1st sync packet received (signals a restart of playback)
|
|
|
- if (packet[0] & 0x10) {
|
|
|
- LOG_INFO("[%p]: 1st sync packet received", ctx);
|
|
|
- }
|
|
|
-
|
|
|
- pthread_mutex_unlock(&ctx->ab_mutex);
|
|
|
-
|
|
|
- LOG_DEBUG("[%p]: sync packet latency:%d rtp_latency:%u rtp:%u remote ntp:%llx, local time:%u local rtp:%u (now:%u)",
|
|
|
- ctx, ctx->latency, rtp_now_latency, rtp_now, remote, ctx->synchro.time, ctx->synchro.rtp, gettime_ms());
|
|
|
-
|
|
|
- if (!count--) {
|
|
|
- rtp_request_timing(ctx);
|
|
|
- count = 3;
|
|
|
- }
|
|
|
-
|
|
|
- if ((ctx->synchro.status & RTP_SYNC) && (ctx->synchro.status & NTP_SYNC)) ctx->cmd_cb(RAOP_TIMING, NULL);
|
|
|
-
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- // NTP timing packet
|
|
|
- case 0x53: {
|
|
|
- u64_t expected;
|
|
|
- u32_t reference = ntohl(*(u32_t*)(pktp+12)); // only low 32 bits in our case
|
|
|
- u64_t remote =(((u64_t) ntohl(*(u32_t*)(pktp+16))) << 32) + ntohl(*(u32_t*)(pktp+20));
|
|
|
- u32_t roundtrip = gettime_ms() - reference;
|
|
|
-
|
|
|
- // better discard sync packets when roundtrip is suspicious
|
|
|
- if (roundtrip > 100) {
|
|
|
- LOG_WARN("[%p]: discarding NTP roundtrip of %u ms", ctx, roundtrip);
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- /*
|
|
|
- The expected elapsed remote time should be exactly the same as
|
|
|
- elapsed local time between the two request, corrected by the
|
|
|
- drifting
|
|
|
- */
|
|
|
- expected = ctx->timing.remote + MS2NTP(reference - ctx->timing.local);
|
|
|
-
|
|
|
- ctx->timing.remote = remote;
|
|
|
- ctx->timing.local = reference;
|
|
|
-
|
|
|
- // now we are synced on NTP (mutex not needed)
|
|
|
- ctx->synchro.status |= NTP_SYNC;
|
|
|
-
|
|
|
- LOG_DEBUG("[%p]: Timing references local:%llu, remote:%llx (delta:%lld, sum:%lld, adjust:%lld, gaps:%d)",
|
|
|
- ctx, ctx->timing.local, ctx->timing.remote);
|
|
|
-
|
|
|
- break;
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- free(packet);
|
|
|
- LOG_INFO("[%p]: terminating", ctx);
|
|
|
-
|
|
|
-#ifndef WIN32
|
|
|
- xTaskNotify(ctx->joiner, 0, eNoAction);
|
|
|
- vTaskDelete(NULL);
|
|
|
-#endif
|
|
|
-
|
|
|
- return NULL;
|
|
|
-}
|
|
|
-
|
|
|
-/*---------------------------------------------------------------------------*/
|
|
|
-static bool rtp_request_timing(rtp_t *ctx) {
|
|
|
- unsigned char req[32];
|
|
|
- u32_t now = gettime_ms();
|
|
|
- int i;
|
|
|
- struct sockaddr_in host;
|
|
|
-
|
|
|
- LOG_DEBUG("[%p]: timing request now:%u (port: %hu)", ctx, now, ctx->rtp_sockets[TIMING].rport);
|
|
|
-
|
|
|
- req[0] = 0x80;
|
|
|
- req[1] = 0x52|0x80;
|
|
|
- *(u16_t*)(req+2) = htons(7);
|
|
|
- *(u32_t*)(req+4) = htonl(0); // dummy
|
|
|
- for (i = 0; i < 16; i++) req[i+8] = 0;
|
|
|
- *(u32_t*)(req+24) = 0;
|
|
|
- *(u32_t*)(req+28) = htonl(now); // this is not a real NTP, but a 32 ms counter in the low part of the NTP
|
|
|
-
|
|
|
- if (ctx->host.s_addr != INADDR_ANY) {
|
|
|
- host.sin_family = AF_INET;
|
|
|
- host.sin_addr = ctx->host;
|
|
|
- } else host = ctx->rtp_host;
|
|
|
-
|
|
|
- // no address from sender, need to wait for 1st packet to be received
|
|
|
- if (host.sin_addr.s_addr == INADDR_ANY) return false;
|
|
|
-
|
|
|
- host.sin_port = htons(ctx->rtp_sockets[TIMING].rport);
|
|
|
-
|
|
|
- if (sizeof(req) != sendto(ctx->rtp_sockets[TIMING].sock, req, sizeof(req), 0, (struct sockaddr*) &host, sizeof(host))) {
|
|
|
- LOG_WARN("[%p]: SENDTO failed (%s)", ctx, strerror(errno));
|
|
|
- }
|
|
|
-
|
|
|
- return true;
|
|
|
-}
|
|
|
-
|
|
|
-/*---------------------------------------------------------------------------*/
|
|
|
-static bool rtp_request_resend(rtp_t *ctx, seq_t first, seq_t last) {
|
|
|
- unsigned char req[8]; // *not* a standard RTCP NACK
|
|
|
-
|
|
|
- // do not request silly ranges (happens in case of network large blackouts)
|
|
|
- if (seq_order(last, first) || last - first > BUFFER_FRAMES / 2) return false;
|
|
|
-
|
|
|
- ctx->resent_req += last - first + 1;
|
|
|
-
|
|
|
- LOG_DEBUG("resend request [W:%hu R:%hu first=%hu last=%hu]", ctx->ab_write, ctx->ab_read, first, last);
|
|
|
-
|
|
|
- req[0] = 0x80;
|
|
|
- req[1] = 0x55|0x80; // Apple 'resend'
|
|
|
- *(u16_t*)(req+2) = htons(1); // our seqnum
|
|
|
- *(u16_t*)(req+4) = htons(first); // missed seqnum
|
|
|
- *(u16_t*)(req+6) = htons(last-first+1); // count
|
|
|
-
|
|
|
- ctx->rtp_host.sin_port = htons(ctx->rtp_sockets[CONTROL].rport);
|
|
|
-
|
|
|
- if (sizeof(req) != sendto(ctx->rtp_sockets[CONTROL].sock, req, sizeof(req), 0, (struct sockaddr*) &ctx->rtp_host, sizeof(ctx->rtp_host))) {
|
|
|
- LOG_WARN("[%p]: SENDTO failed (%s)", ctx, strerror(errno));
|
|
|
- }
|
|
|
-
|
|
|
- return true;
|
|
|
-}
|
|
|
-
|
|
|
+
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+static void *rtp_thread_func(void *arg) {
|
|
|
+ fd_set fds;
|
|
|
+ int i, sock = -1;
|
|
|
+ int count = 0;
|
|
|
+ bool ntp_sent;
|
|
|
+ char *packet = malloc(MAX_PACKET);
|
|
|
+ rtp_t *ctx = (rtp_t*) arg;
|
|
|
+
|
|
|
+ for (i = 0; i < 3; i++) {
|
|
|
+ if (ctx->rtp_sockets[i].sock > sock) sock = ctx->rtp_sockets[i].sock;
|
|
|
+ // send synchro requets 3 times
|
|
|
+ ntp_sent = rtp_request_timing(ctx);
|
|
|
+ }
|
|
|
+
|
|
|
+ while (ctx->running) {
|
|
|
+ ssize_t plen;
|
|
|
+ char type;
|
|
|
+ socklen_t rtp_client_len = sizeof(struct sockaddr_storage);
|
|
|
+ int idx = 0;
|
|
|
+ char *pktp = packet;
|
|
|
+ struct timeval timeout = {0, 100*1000};
|
|
|
+
|
|
|
+ FD_ZERO(&fds);
|
|
|
+ for (i = 0; i < 3; i++) { FD_SET(ctx->rtp_sockets[i].sock, &fds); }
|
|
|
+
|
|
|
+ if (select(sock + 1, &fds, NULL, NULL, &timeout) <= 0) continue;
|
|
|
+
|
|
|
+ for (i = 0; i < 3; i++)
|
|
|
+ if (FD_ISSET(ctx->rtp_sockets[i].sock, &fds)) idx = i;
|
|
|
+
|
|
|
+ plen = recvfrom(ctx->rtp_sockets[idx].sock, packet, MAX_PACKET, 0, (struct sockaddr*) &ctx->rtp_host, &rtp_client_len);
|
|
|
+
|
|
|
+ if (!ntp_sent) {
|
|
|
+ LOG_WARN("[%p]: NTP request not send yet", ctx);
|
|
|
+ ntp_sent = rtp_request_timing(ctx);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (plen < 0) continue;
|
|
|
+ assert(plen <= MAX_PACKET);
|
|
|
+
|
|
|
+ type = packet[1] & ~0x80;
|
|
|
+ pktp = packet;
|
|
|
+
|
|
|
+ switch (type) {
|
|
|
+ seq_t seqno;
|
|
|
+ unsigned rtptime;
|
|
|
+
|
|
|
+ // re-sent packet
|
|
|
+ case 0x56: {
|
|
|
+ pktp += 4;
|
|
|
+ plen -= 4;
|
|
|
+ }
|
|
|
+
|
|
|
+ // data packet
|
|
|
+ case 0x60: {
|
|
|
+ seqno = ntohs(*(u16_t*)(pktp+2));
|
|
|
+ rtptime = ntohl(*(u32_t*)(pktp+4));
|
|
|
+
|
|
|
+ // adjust pointer and length
|
|
|
+ pktp += 12;
|
|
|
+ plen -= 12;
|
|
|
+
|
|
|
+ LOG_SDEBUG("[%p]: seqno:%hu rtp:%u (type: %x, first: %u)", ctx, seqno, rtptime, type, packet[1] & 0x80);
|
|
|
+
|
|
|
+ // check if packet contains enough content to be reasonable
|
|
|
+ if (plen < 16) break;
|
|
|
+
|
|
|
+ if ((packet[1] & 0x80) && (type != 0x56)) {
|
|
|
+ LOG_INFO("[%p]: 1st audio packet received", ctx);
|
|
|
+ }
|
|
|
+
|
|
|
+ buffer_put_packet(ctx, seqno, rtptime, packet[1] & 0x80, pktp, plen);
|
|
|
+
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ // sync packet
|
|
|
+ case 0x54: {
|
|
|
+ u32_t rtp_now_latency = ntohl(*(u32_t*)(pktp+4));
|
|
|
+ u64_t remote = (((u64_t) ntohl(*(u32_t*)(pktp+8))) << 32) + ntohl(*(u32_t*)(pktp+12));
|
|
|
+ u32_t rtp_now = ntohl(*(u32_t*)(pktp+16));
|
|
|
+ u16_t flags = ntohs(*(u16_t*)(pktp+2));
|
|
|
+
|
|
|
+ pthread_mutex_lock(&ctx->ab_mutex);
|
|
|
+
|
|
|
+ // re-align timestamp and expected local playback time (and magic 11025 latency)
|
|
|
+ ctx->latency = rtp_now - rtp_now_latency;
|
|
|
+ if (flags == 7 || flags == 4) ctx->latency += 11025;
|
|
|
+ if (ctx->latency < MIN_LATENCY) ctx->latency = MIN_LATENCY;
|
|
|
+ else if (ctx->latency > MAX_LATENCY) ctx->latency = MAX_LATENCY;
|
|
|
+ ctx->synchro.rtp = rtp_now - ctx->latency;
|
|
|
+ ctx->synchro.time = ctx->timing.local + (u32_t) NTP2MS(remote - ctx->timing.remote);
|
|
|
+
|
|
|
+ // now we are synced on RTP frames
|
|
|
+ ctx->synchro.status |= RTP_SYNC;
|
|
|
+
|
|
|
+ // 1st sync packet received (signals a restart of playback)
|
|
|
+ if (packet[0] & 0x10) {
|
|
|
+ LOG_INFO("[%p]: 1st sync packet received", ctx);
|
|
|
+ }
|
|
|
+
|
|
|
+ pthread_mutex_unlock(&ctx->ab_mutex);
|
|
|
+
|
|
|
+ LOG_DEBUG("[%p]: sync packet latency:%d rtp_latency:%u rtp:%u remote ntp:%llx, local time:%u local rtp:%u (now:%u)",
|
|
|
+ ctx, ctx->latency, rtp_now_latency, rtp_now, remote, ctx->synchro.time, ctx->synchro.rtp, gettime_ms());
|
|
|
+
|
|
|
+ if (!count--) {
|
|
|
+ rtp_request_timing(ctx);
|
|
|
+ count = 3;
|
|
|
+ }
|
|
|
+
|
|
|
+ if ((ctx->synchro.status & RTP_SYNC) && (ctx->synchro.status & NTP_SYNC)) ctx->cmd_cb(RAOP_TIMING, NULL);
|
|
|
+
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ // NTP timing packet
|
|
|
+ case 0x53: {
|
|
|
+ u64_t expected;
|
|
|
+ u32_t reference = ntohl(*(u32_t*)(pktp+12)); // only low 32 bits in our case
|
|
|
+ u64_t remote =(((u64_t) ntohl(*(u32_t*)(pktp+16))) << 32) + ntohl(*(u32_t*)(pktp+20));
|
|
|
+ u32_t roundtrip = gettime_ms() - reference;
|
|
|
+
|
|
|
+ // better discard sync packets when roundtrip is suspicious
|
|
|
+ if (roundtrip > 100) {
|
|
|
+ LOG_WARN("[%p]: discarding NTP roundtrip of %u ms", ctx, roundtrip);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ The expected elapsed remote time should be exactly the same as
|
|
|
+ elapsed local time between the two request, corrected by the
|
|
|
+ drifting
|
|
|
+ */
|
|
|
+ expected = ctx->timing.remote + MS2NTP(reference - ctx->timing.local);
|
|
|
+
|
|
|
+ ctx->timing.remote = remote;
|
|
|
+ ctx->timing.local = reference;
|
|
|
+
|
|
|
+ // now we are synced on NTP (mutex not needed)
|
|
|
+ ctx->synchro.status |= NTP_SYNC;
|
|
|
+
|
|
|
+ LOG_DEBUG("[%p]: Timing references local:%llu, remote:%llx (delta:%lld, sum:%lld, adjust:%lld, gaps:%d)",
|
|
|
+ ctx, ctx->timing.local, ctx->timing.remote);
|
|
|
+
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ free(packet);
|
|
|
+ LOG_INFO("[%p]: terminating", ctx);
|
|
|
+
|
|
|
+#ifndef WIN32
|
|
|
+ xTaskNotify(ctx->joiner, 0, eNoAction);
|
|
|
+ vTaskDelete(NULL);
|
|
|
+#endif
|
|
|
+
|
|
|
+ return NULL;
|
|
|
+}
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+static bool rtp_request_timing(rtp_t *ctx) {
|
|
|
+ unsigned char req[32];
|
|
|
+ u32_t now = gettime_ms();
|
|
|
+ int i;
|
|
|
+ struct sockaddr_in host;
|
|
|
+
|
|
|
+ LOG_DEBUG("[%p]: timing request now:%u (port: %hu)", ctx, now, ctx->rtp_sockets[TIMING].rport);
|
|
|
+
|
|
|
+ req[0] = 0x80;
|
|
|
+ req[1] = 0x52|0x80;
|
|
|
+ *(u16_t*)(req+2) = htons(7);
|
|
|
+ *(u32_t*)(req+4) = htonl(0); // dummy
|
|
|
+ for (i = 0; i < 16; i++) req[i+8] = 0;
|
|
|
+ *(u32_t*)(req+24) = 0;
|
|
|
+ *(u32_t*)(req+28) = htonl(now); // this is not a real NTP, but a 32 ms counter in the low part of the NTP
|
|
|
+
|
|
|
+ if (ctx->host.s_addr != INADDR_ANY) {
|
|
|
+ host.sin_family = AF_INET;
|
|
|
+ host.sin_addr = ctx->host;
|
|
|
+ } else host = ctx->rtp_host;
|
|
|
+
|
|
|
+ // no address from sender, need to wait for 1st packet to be received
|
|
|
+ if (host.sin_addr.s_addr == INADDR_ANY) return false;
|
|
|
+
|
|
|
+ host.sin_port = htons(ctx->rtp_sockets[TIMING].rport);
|
|
|
+
|
|
|
+ if (sizeof(req) != sendto(ctx->rtp_sockets[TIMING].sock, req, sizeof(req), 0, (struct sockaddr*) &host, sizeof(host))) {
|
|
|
+ LOG_WARN("[%p]: SENDTO failed (%s)", ctx, strerror(errno));
|
|
|
+ }
|
|
|
+
|
|
|
+ return true;
|
|
|
+}
|
|
|
+
|
|
|
+/*---------------------------------------------------------------------------*/
|
|
|
+static bool rtp_request_resend(rtp_t *ctx, seq_t first, seq_t last) {
|
|
|
+ unsigned char req[8]; // *not* a standard RTCP NACK
|
|
|
+
|
|
|
+ // do not request silly ranges (happens in case of network large blackouts)
|
|
|
+ if (seq_order(last, first) || last - first > BUFFER_FRAMES / 2) return false;
|
|
|
+
|
|
|
+ ctx->resent_req += last - first + 1;
|
|
|
+
|
|
|
+ LOG_DEBUG("resend request [W:%hu R:%hu first=%hu last=%hu]", ctx->ab_write, ctx->ab_read, first, last);
|
|
|
+
|
|
|
+ req[0] = 0x80;
|
|
|
+ req[1] = 0x55|0x80; // Apple 'resend'
|
|
|
+ *(u16_t*)(req+2) = htons(1); // our seqnum
|
|
|
+ *(u16_t*)(req+4) = htons(first); // missed seqnum
|
|
|
+ *(u16_t*)(req+6) = htons(last-first+1); // count
|
|
|
+
|
|
|
+ ctx->rtp_host.sin_port = htons(ctx->rtp_sockets[CONTROL].rport);
|
|
|
+
|
|
|
+ if (sizeof(req) != sendto(ctx->rtp_sockets[CONTROL].sock, req, sizeof(req), 0, (struct sockaddr*) &ctx->rtp_host, sizeof(ctx->rtp_host))) {
|
|
|
+ LOG_WARN("[%p]: SENDTO failed (%s)", ctx, strerror(errno));
|
|
|
+ }
|
|
|
+
|
|
|
+ return true;
|
|
|
+}
|
|
|
+
|
sleclerc