+++ /dev/null
-/*
- * Copyright (C) 2005-2008 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
-/** \file ortp_recv.c paraslash's ortp receiver */
-
-#include <ortp/ortp.h>
-#include "para.h"
-
-#include "ortp.h"
-#include "list.h"
-#include "sched.h"
-#include "ggo.h"
-#include "recv.h"
-#include "ortp_recv.cmdline.h"
-
-#include "error.h"
-#include "audiod.h"
-#include "string.h"
-
-#define CHUNK_SIZE 128 * 1024
-
-/**
- * data specific to the ortp receiver
- *
- * \sa receiver receiver_node
- */
-struct private_ortp_recv_data {
-/**
- *
- *
- * whether a header was received
- *
- * A flag indicating whether the ortp receiver already received a packet which
- * contains the audio file header.
- *
- * This flag has no effect if the audio stream indicates that no extra headers
- * will be sent (mp3). Otherwise, all data packets are dropped until the
- * header is received.
- */
-int have_header;
-/** the ortp session this instance of the receiver belongs to */
-RtpSession *session;
-/** the time the first data or header packet was received */
-struct timeval start;
-/** ETA of the next chunk */
-struct timeval next_chunk;
-/** number of consecutive bad chunks */
-int c_bad;
-/** the current timestamp which is passed to the receiving function of libortp */
-uint32_t timestamp;
-/** \a timestamp increases by this amount */
-uint32_t chunk_ts;
-};
-
-
-static int msg_to_buf(mblk_t *mp, char *buffer, int len)
-{
- mblk_t *m, *mprev;
- size_t mlen, rlen = len;
-
- m = mp->b_cont;
- mprev = mp;
- while (m != NULL) {
- mlen = m->b_wptr - m->b_rptr;
- if (mlen <= rlen) {
- mblk_t *consumed = m;
- memcpy(buffer, m->b_rptr, mlen);
- /* go to next mblk_t */
- mprev->b_cont = m->b_cont;
- m = m->b_cont;
- consumed->b_cont = NULL;
- freeb (consumed);
- buffer += mlen;
- rlen -= mlen;
- } else {
- memcpy (buffer, m->b_rptr, rlen);
- m->b_rptr += rlen;
- return len;
- }
- }
- return len - rlen;
-}
-
-
-static void ortp_recv_pre_select(struct sched *s, struct task *t)
-{
- struct receiver_node *rn = container_of(t, struct receiver_node, task);
- struct private_ortp_recv_data *pord = rn->private_data;
- struct timeval tmp;
-
- if (tv_diff(now, &pord->next_chunk, &tmp) >= 0) {
- tmp.tv_sec = 0;
- tmp.tv_usec = 1000;
- }
- if (tv_diff(&s->timeout, &tmp, NULL) > 0)
- s->timeout = tmp;
-}
-
-static void compute_next_chunk(unsigned chunk_time,
- struct private_ortp_recv_data *pord)
-{
- struct timeval chunk_tv = {0, chunk_time};
- struct timeval tmp;
-
- tv_add(&chunk_tv, &pord->next_chunk, &tmp);
- pord->next_chunk = tmp;
- pord->timestamp += pord->chunk_ts;
-// PARA_DEBUG_LOG("next chunk (ts = %d) due at %lu:%lu\n",
-// pord->timestamp, pord->next_chunk.tv_sec,
-// pord->next_chunk.tv_usec);
-}
-
-static void ortp_recv_post_select(__a_unused struct sched *s, struct task *t)
-{
- struct receiver_node *rn = container_of(t, struct receiver_node, task);
- struct private_ortp_recv_data *pord = rn->private_data;
- mblk_t *mp;
- int packet_type, stream_type;
- char tmpbuf[CHUNK_SIZE + 3];
- unsigned chunk_time;
- size_t packet_size;
-
-// PARA_INFO_LOG("rn: %p, pord: %p, session: %p\n", rn, pord, pord->session);
- if (rn->output_error && *rn->output_error < 0) {
- t->error = *rn->output_error;
- return;
- }
- if (pord->start.tv_sec)
- if (tv_diff(now, &pord->next_chunk, NULL) < 0)
- return;
- mp = rtp_session_recvm_with_ts(pord->session, pord->timestamp);
- if (!mp) {
- struct timeval min_delay = {0, 100};
-// PARA_INFO_LOG("nope, chunk_ts = %d, loaded: %d, bad: %d\n",
-// pord->timestamp, rn->loaded, pord->c_bad);
- pord->c_bad++;
- if ((pord->c_bad > 5000 && pord->start.tv_sec) || pord->c_bad > 10000) {
- t->error = -E_TOO_MANY_BAD_CHUNKS;
- return;
- }
- tv_add(now, &min_delay, &pord->next_chunk);
- return;
- }
- /* okay, we have a chunk of data */
- if (!pord->start.tv_sec)
- pord->start = *now;
- t->error = msg_to_buf(mp, tmpbuf, CHUNK_SIZE);
- if (t->error < ORTP_AUDIO_HEADER_LEN) {
- if (t->error < 0)
- t->error = -E_MSG_TO_BUF;
- else
- t->error = -E_ORTP_RECV_EOF;
- goto err_out;
- }
- packet_size = t->error;
- packet_type = READ_PACKET_TYPE(tmpbuf);
- stream_type = READ_STREAM_TYPE(tmpbuf);
- chunk_time = READ_CHUNK_TIME(tmpbuf);
- pord->chunk_ts = READ_CHUNK_TS(tmpbuf);
-// PARA_INFO_LOG("packet type: %d, stream type: %d, chunk time: %u,"
-// " chunk_ts: %u, loaded: %u, bad: %d\n", packet_type,
-// stream_type, chunk_time, pord->chunk_ts, rn->loaded, pord->c_bad);
- switch (packet_type) {
- unsigned header_len, payload_len;
- case ORTP_EOF:
- t->error = -E_RECV_EOF;
- goto err_out;
- case ORTP_BOF:
- PARA_INFO_LOG("bof (%zu)\n", packet_size);
- pord->have_header = 1;
- /* fall through */
- case ORTP_DATA:
- if (!pord->have_header && stream_type)
- /* can't use the data, wait for header */
- goto success;
- if (packet_size + rn->loaded >= CHUNK_SIZE + ORTP_AUDIO_HEADER_LEN) {
- t->error = -E_OVERRUN;
- goto err_out;
- }
- if (packet_size > ORTP_AUDIO_HEADER_LEN) {
- memcpy(rn->buf + rn->loaded, tmpbuf + ORTP_AUDIO_HEADER_LEN,
- packet_size - ORTP_AUDIO_HEADER_LEN);
- rn->loaded += packet_size - ORTP_AUDIO_HEADER_LEN;
- }
- goto success;
- case ORTP_HEADER:
- header_len = READ_HEADER_LEN(tmpbuf);
- PARA_DEBUG_LOG("header packet (%zu bytes), header len: %d\n",
- packet_size, header_len);
- if (!pord->have_header) {
- pord->have_header = 1;
- memcpy(rn->buf, tmpbuf + ORTP_AUDIO_HEADER_LEN,
- packet_size - ORTP_AUDIO_HEADER_LEN);
- rn->loaded = packet_size - ORTP_AUDIO_HEADER_LEN;
- goto success;
- }
- if (header_len + ORTP_AUDIO_HEADER_LEN > packet_size) {
- t->error = -E_INVALID_HEADER;
- goto err_out;
- }
- payload_len = packet_size - ORTP_AUDIO_HEADER_LEN - header_len;
- if (rn->loaded + payload_len > CHUNK_SIZE) {
- t->error = -E_OVERRUN;
- goto err_out;
- }
- if (payload_len)
- memcpy(rn->buf + rn->loaded, tmpbuf
- + (packet_size - payload_len), payload_len);
- rn->loaded += payload_len;
- }
-success:
- t->error = 0;
- freemsg(mp);
- if (pord->c_bad) {
- pord->c_bad = 0;
- pord->next_chunk = *now;
- }
- compute_next_chunk(chunk_time, pord);
- return;
-err_out:
- freemsg(mp);
-}
-
-static void ortp_shutdown(void)
-{
-// ortp_global_stats_display();
- ortp_exit();
-}
-
-static void ortp_recv_close(struct receiver_node *rn)
-{
- struct private_ortp_recv_data *pord = rn->private_data;
-
- rtp_session_destroy(pord->session);
- free(rn->private_data);
- free(rn->buf);
-}
-
-static void *ortp_recv_parse_config(int argc, char **argv)
-{
- int ret;
-
- struct ortp_recv_args_info *tmp =
- para_calloc(sizeof(struct ortp_recv_args_info));
-
- ret = ortp_recv_cmdline_parser(argc, argv, tmp)? -E_ORTP_SYNTAX : 1;
- if (ret > 0)
- return tmp;
- free(tmp);
- return NULL;
-}
-
-static int ortp_recv_open(struct receiver_node *rn)
-{
- struct private_ortp_recv_data *pord;
- struct ortp_recv_args_info *c = rn->conf;
-
- rn->buf = para_calloc(CHUNK_SIZE);
-
- rn->private_data = para_calloc(sizeof(struct private_ortp_recv_data));
- pord = rn->private_data;
- pord->session = rtp_session_new(RTP_SESSION_RECVONLY);
- PARA_NOTICE_LOG("receiving from %s:%d\n", c->host_arg, c->port_arg);
- rtp_session_set_local_addr(pord->session, c->host_arg, c->port_arg);
- rtp_session_set_remote_addr(pord->session, c->host_arg, c->port_arg);
- rtp_session_set_payload_type(pord->session, PAYLOAD_AUDIO_CONTINUOUS);
- rtp_session_enable_adaptive_jitter_compensation(pord->session, TRUE);
- rtp_session_set_jitter_compensation(pord->session,
- c->jitter_compensation_arg);
- return 1;
-}
-
-/**
- * the init function of the ortp receiver
- *
- * \param r pointer to the receiver struct to initialize
- *
- * Initialize all function pointers of \a r and call libortp's ortp_init().
- */
-void ortp_recv_init(struct receiver *r)
-{
- struct ortp_recv_args_info dummy;
-
- ortp_recv_cmdline_parser_init(&dummy);
- r->shutdown = ortp_shutdown;
- r->open = ortp_recv_open;
- r->close = ortp_recv_close;
- r->pre_select = ortp_recv_pre_select;
- r->post_select = ortp_recv_post_select;
- r->parse_config = ortp_recv_parse_config;
- r->help = (struct ggo_help) {
- .short_help = ortp_recv_args_info_help,
- .detailed_help = ortp_recv_args_info_detailed_help
- };
-
- ortp_init();
-}
projects / paraslash.git / blobdiff