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/* ------------------------- oggamp~ ------------------------------------------ */
/* */
/* Tilde object to receive an Ogg Vorbis stream from an IceCast2 server. */
/* Written by Olaf Matthes <olaf.matthes@gmx.de> */
/* Get source at http://www.akustische-kunst.de/puredata/ */
/* */
/* Graphical buffer status display written by Yves Degoyon. */
/* */
/* Thanks for hours (maybe days?) of beta testing to Oliver Thuns. */
/* */
/* This library is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU Lesser General Public */
/* License as published by the Free Software Foundation; either */
/* version 2 of the License, or (at your option) any later version. */
/* */
/* This library is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU */
/* Lesser General Public License for more details. */
/* */
/* You should have received a copy of the GNU Lesser General Public */
/* License along with this library; if not, write to the */
/* Free Software Foundation, Inc., 59 Temple Place - Suite 330, */
/* Boston, MA 02111-1307, USA. */
/* */
/* Based on PureData by Miller Puckette and others. */
/* Uses the Ogg Vorbis decoding library which can be found at */
/* http://www.vorbis.com/ */
/* */
/* ---------------------------------------------------------------------------- */
/* Pd includes */
#include "m_pd.h"
#include "g_canvas.h"
/* Vorbis includes */
#include <vorbis/codec.h>
#include <sys/types.h>
#include <ctype.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <stdlib.h>
#ifdef _WIN32
#include <io.h> /* for 'write' in pute-function only */
#include <winsock.h>
#include <winbase.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/time.h>
#include <unistd.h>
#define SOCKET_ERROR -1
#endif
#ifdef _MSC_VER
#pragma warning( disable : 4244 )
#pragma warning( disable : 4305 )
#endif
#ifdef WIN32
#define sys_closesocket closesocket
#else
#define sys_closesocket close
#endif
/************************* oggamp~ object ******************************/
/*
Each instance of oggamp~ owns a "child" thread for doing the data
transfer. The parent thread signals the child each time:
(1) a connection wants opening or closing;
(2) we've eaten another 1/16 of the shared buffer (so that the
child thread should check if it's time to receive some more.)
The child signals the parent whenever a receive has completed. Signalling
is done by setting "conditions" and putting data in mutex-controlled common
areas.
*/
#define REQUEST_NOTHING 0
#define REQUEST_CONNECT 1
#define REQUEST_CLOSE 2
#define REQUEST_QUIT 3
#define REQUEST_BUSY 4
#define REQUEST_DATA 5
#define REQUEST_RECONNECT 6
#define STATE_IDLE 0
#define STATE_STARTUP 1 /* connecting and filling the buffer */
#define STATE_STREAM 2 /* streaming aund audio output */
#define READSIZE 65536 /* _encoded_ data we request from buffer */
#define READ 1024 /* amount of data we pass on to decoder */
#define DEFBUFPERCHAN 262144 /* audio output buffer default: 256k */
#define MINBUFSIZE (4 * READSIZE)
#define MAXBUFSIZE 16777216 /* arbitrary; just don't want to hang malloc */
#define STRBUF_SIZE 1024 /* char received from server on startup */
#define OBJWIDTH 68 /* width of buffer statis display */
#define OBJHEIGHT 10 /* height of buffer statis display */
#define MAXSTREAMCHANS 250 /* maximum number of channels */
static char *oggamp_version = "oggamp~: ogg/vorbis streaming client version 0.3, written by Olaf Matthes";
static t_class *oggamp_class;
typedef struct _oggamp
{
t_object x_obj;
t_canvas *x_canvas; /* remember canvas */
t_outlet *x_connection;
t_clock *x_clock;
t_float *x_buf; /* audio data buffer */
t_int x_bufsize; /* buffer size in bytes */
t_int x_noutlets; /* number of audio outlets */
t_sample **x_outvec; /* audio vectors */
t_int x_vecsize; /* vector size for transfers */
t_int x_state; /* opened, running, or idle */
/* parameters to communicate with subthread */
t_int x_requestcode; /* pending request from parent to I/O thread */
t_int x_connecterror; /* slot for "errno" return */
t_int x_streamchannels; /* number of channels in Ogg Vorbis bitstream */
t_int x_streamrate; /* sample rate of stream */
/* buffer stuff */
t_int x_fifosize; /* buffer size appropriately rounded down */
t_int x_fifohead; /* index of next byte to get from file */
t_int x_fifotail; /* index of next byte the ugen will read */
t_int x_fifobytes; /* number of bytes available in buffer */
t_int x_eof; /* true if ogg stream has ended */
t_int x_sigcountdown; /* counter for signalling child for more data */
t_int x_sigperiod; /* number of ticks per signal */
t_int x_siginterval; /* number of times per buffer (depends on data rate) */
/* ogg/vorbis related stuff */
ogg_stream_state x_os; /* take physical pages, weld into a logical stream of packets */
ogg_sync_state x_oy; /* sync and verify incoming physical bitstream */
ogg_page x_og; /* one Ogg bitstream page. Vorbis packets are inside */
ogg_packet x_op; /* one raw packet of data for decode */
vorbis_info x_vi; /* struct that stores all the static vorbis bitstream settings */
vorbis_comment x_vc; /* struct that stores all the user comments */
vorbis_dsp_state x_vd; /* central working state for the packet->PCM decoder */
vorbis_block x_vb; /* local working space for packet->PCM decode */
t_int x_eos; /* end of stream */
char *x_buffer; /* buffer used to pass on to ogg/vorbis */
t_int x_vorbis; /* info about encoder status */
t_int x_sync; /* indicates whether the decoder has been synced */
t_float x_pages; /* number of pages that have been output to server */
t_outlet *x_outpages; /* output to send them to */
t_int x_connectstate; /* indicates the state of socket connection */
t_int x_fd; /* the socket number */
t_int x_graphic; /* indicates if we show a graphic bar */
t_float x_resample; /* indicates if we need to resample signal (1 = no resampling) */
t_int x_recover; /* indicate how to behave on buffer underruns */
t_int x_disconnect; /* indicates that user want's to disconnect */
t_int x_samplerate; /* Pd's sample rate */
/* server stuff */
char *x_hostname; /* name or IP of host to connect to */
char *x_mountpoint; /* mountpoint of ogg-bitstream */
t_int x_port; /* port number on which the connection is made */
/* tread stuff */
pthread_mutex_t x_mutex;
pthread_cond_t x_requestcondition;
pthread_cond_t x_answercondition;
pthread_t x_childthread;
} t_oggamp;
/* check if we can read from socket */
static int oggamp_check_for_data(t_int sock)
{
fd_set set;
struct timeval tv;
t_int ret;
tv.tv_sec = 0;
tv.tv_usec = 20000;
FD_ZERO(&set);
FD_SET(sock, &set);
ret = select(sock + 1, &set, NULL, NULL, &tv);
if (ret > 0)
return 1;
return 0;
}
/* receive 'size' bytes from server */
static int oggamp_child_receive(int fd, char *buffer, int size)
{
int ret = -1;
int i;
ret = recv(fd, buffer, size, 0);
if(ret < 0)
{
post("oggamp~: receive error" );
}
return ret;
}
/* ogg/vorbis decoder sync init */
static void oggamp_vorbis_sync_init(t_oggamp *x)
{
ogg_sync_init(&(x->x_oy)); /* Now we can read pages */
x->x_sync = 1;
}
/* ogg/vorbis decoder setup */
static int oggamp_vorbis_init(t_oggamp *x, int fd)
{
int i;
int result; /* error return code */
int bytes; /* number of bytes receive returned */
char *buffer; /* buffer for undecoded ogg vorbis data */
if(!x->x_sync)oggamp_vorbis_sync_init(x); /* init the sync */
x->x_eos = 0; /* indicate beginning of new stream */
/* submit a 4k block to libvorbis' ogg layer */
buffer = ogg_sync_buffer(&(x->x_oy),4096);
post("oggamp~: prebuffering...");
bytes = oggamp_child_receive(fd, buffer, 4096);
ogg_sync_wrote(&(x->x_oy),bytes);
result = ogg_sync_pageout(&(x->x_oy),&(x->x_og));
/* we might need more data */
if(result == -1)
{
post("reading more...");
buffer = ogg_sync_buffer(&(x->x_oy),4096);
bytes = oggamp_child_receive(fd, buffer, 4096);
ogg_sync_wrote(&(x->x_oy),bytes);
result = ogg_sync_pageout(&(x->x_oy),&(x->x_og));
}
/* Get the first page. */
if(result != 1)
{
/* error case. Must not be Vorbis data */
error("oggamp~: input does not appear to be an ogg bitstream (error %d)", result);
return -1;
}
ogg_stream_init(&(x->x_os),ogg_page_serialno(&(x->x_og)));
vorbis_info_init(&(x->x_vi));
vorbis_comment_init(&(x->x_vc));
if(ogg_stream_pagein(&(x->x_os),&(x->x_og))<0){
/* error; stream version mismatch perhaps */
error("oggamp~: error reading first page of ogg bitstream data");
return -1;
}
if(ogg_stream_packetout(&(x->x_os),&(x->x_op))!=1){
/* no page? must not be vorbis */
error("oggamp~: error reading initial header packet");
return -1;
}
if(vorbis_synthesis_headerin(&(x->x_vi),&(x->x_vc),&(x->x_op))<0){
/* error case; not a vorbis header */
error("oggamp~: this ogg bitstream does not contain Vorbis audio data");
return -1;
}
i=0;
while(i<2){
while(i<2){
result = ogg_sync_pageout(&(x->x_oy),&(x->x_og));
if(result == 0)break; /* Need more data */
/* Don't complain about missing or corrupt data yet. We'll
catch it at the packet output phase */
if(result == 1)
{
ogg_stream_pagein(&(x->x_os),&(x->x_og)); /* we can ignore any errors here
as they'll also become apparent
at packetout */
while(i<2){
result = ogg_stream_packetout(&(x->x_os),&(x->x_op));
if(result==0)break;
if(result<0){
/* Uh oh; data at some point was corrupted or missing!
We can't tolerate that in a header. Die. */
error("oggamp~: corrupt secondary header, exiting");
return -1;
}
vorbis_synthesis_headerin(&(x->x_vi),&(x->x_vc),&(x->x_op));
i++;
}
}
}
/* no harm in not checking before adding more */
buffer = ogg_sync_buffer(&(x->x_oy),READ);
/* read in next 4k of data */
bytes = oggamp_child_receive(fd, buffer, READ);
if(bytes==0 && i<2){
error("oggamp~: end of stream before finding all Vorbis headers");
return -1;
}
ogg_sync_wrote(&(x->x_oy),bytes);
}
/* Throw the comments plus a few lines about the bitstream we're decoding */
post("oggamp~: reading Ogg Vorbis header...");
{
char **ptr = x->x_vc.user_comments;
while(*ptr){
post(" %s",*ptr);
++ptr;
}
post("oggamp~: bitstream is %d channels @ %ld Hz with %ldkbps", x->x_vi.channels, x->x_vi.rate, x->x_vi.bitrate_nominal / 1000);
x->x_streamchannels = x->x_vi.channels;
x->x_streamrate = x->x_vi.rate;
if(x->x_samplerate != x->x_streamrate) /* upsampling */
{ /* we would need to use upsampling */
post("oggamp~: resampling from %ld Hz to %ld Hz not supported !", x->x_vi.rate, x->x_samplerate);
return (-1);
}
post("oggamp~: encoded by: %s", x->x_vc.vendor);
}
/* OK, got and parsed all three headers. Initialize the Vorbis packet->PCM decoder. */
vorbis_synthesis_init(&(x->x_vd),&(x->x_vi)); /* central decode state */
vorbis_block_init(&(x->x_vd),&(x->x_vb)); /* local state */
x->x_vorbis = 1;
return (1);
}
/* clear the ogg/vorbis decoder */
static void oggamp_vorbis_sync_clear(t_oggamp *x)
{
/* OK, clean up the framer */
ogg_sync_clear(&(x->x_oy));
x->x_sync = 0;
post("oggamp~: decoder cleared");
}
/* deinit the ogg/vorbis decoder */
static void oggamp_vorbis_deinit(t_oggamp *x)
{
if(x->x_vorbis)
{
x->x_vorbis = 0;
/* clean up this logical bitstream; before exit we see if we're
followed by another [chained] */
ogg_stream_clear(&(x->x_os));
/* ogg_page and ogg_packet structs always point to storage in
libvorbis. They're never freed or manipulated directly */
vorbis_block_clear(&(x->x_vb));
vorbis_dsp_clear(&(x->x_vd));
vorbis_comment_clear(&(x->x_vc));
vorbis_info_clear(&(x->x_vi)); /* must be called last */
post("oggamp~: decoder deinitialised");
/* only clear completely in case we're going to disconnect */
/* !! must not be called when receiving chained streams !! */
if(x->x_disconnect)oggamp_vorbis_sync_clear(x);
}
}
/* decode ogg/vorbis and receive new data */
static int oggamp_decode_input(t_oggamp *x, float *buf, int fifohead, int fifosize, int fd)
{
int i, result;
float **pcm; /* pointer to decoded float samples */
char *buffer; /* buffer for ogg vorbis */
int samples; /* number of samples returned by decoder at each block! */
int n = 0; /* total number of samples returned by decoder at this call */
int bytes; /* number of bytes submitted to decoder */
int position = fifohead;
int streamchannels = x->x_streamchannels;
int channels = x->x_noutlets;
/* the rest is just a straight decode loop until end of stream */
while(!x->x_eos)
{
result = ogg_sync_pageout(&(x->x_oy),&(x->x_og));
if(result == 0)break; /* need more data */
if(result < 0)
{ /* missing or corrupt data at this page position */
error("oggamp~: corrupt or missing data in bitstream, continuing...");
}
else{
ogg_stream_pagein(&(x->x_os),&(x->x_og)); /* can safely ignore errors at this point */
while(1)
{
result = ogg_stream_packetout(&(x->x_os),&(x->x_op));
if(result==0)break; /* need more data */
if(result<0)
{ /* missing or corrupt data at this page position */
/* no reason to complain; already complained above */
}else
{
/* we have a packet. Decode it */
if(vorbis_synthesis(&(x->x_vb),&(x->x_op))==0) /* test for success! */
vorbis_synthesis_blockin(&(x->x_vd),&(x->x_vb));
/*
**pcm is a multichannel float vector. In stereo, for
example, pcm[0] is left, and pcm[1] is right. samples is
the size of each channel. Convert the float values
(-1.<=range<=1.) to whatever PCM format and write it out */
while((samples = vorbis_synthesis_pcmout(&(x->x_vd),&pcm))>0)
{
int j;
/* copy into our output buffer */
if(streamchannels >= channels)
{
for(j = 0; j < samples; j++)
{
for(i = 0; i < channels; i++)
{
buf[position + i] = pcm[i][j];
}
position = (position + channels) % fifosize;
}
vorbis_synthesis_read(&(x->x_vd),samples); /* tell libvorbis how
many samples we
actually consumed */
n += samples; /* sum up the samples we got from decoder */
}
else
{
for(j = 0; j < samples; j++)
{
/* copy the channels we have */
for(i = 0; i < streamchannels; i++)
{
buf[position + i] = pcm[i][j];
}
/* fill rest of buffer with silence */
for(i = streamchannels; i < channels; i++)
{
buf[position + i] = 0.;
}
position = (position + channels) % fifosize;
}
vorbis_synthesis_read(&(x->x_vd),samples); /* tell libvorbis how
many samples we
actually consumed */
n += samples; /* sum up the samples we got from decoder */
}
}
}
}
if(ogg_page_eos(&(x->x_og)))x->x_eos=1;
}
}
/* read data from socket */
if(!x->x_eos) /* read from input until end of stream */
{
buffer = ogg_sync_buffer(&(x->x_oy), READ);
/* read next 4k of data out of buffer */
bytes = oggamp_child_receive(fd, buffer, READ);
if(bytes < 0)
{
x->x_eos = 1; /* indicate end of stream */
return (bytes);
}
ogg_sync_wrote(&(x->x_oy),bytes);
}
else /* we read through all the file... */
{ /* will have to reinit decoder for new file */
post("oggamp~: end of stream detected");
return (0);
}
return (n*x->x_vi.channels);
}
/* connect to shoutcast server */
static int oggamp_child_connect(char *hostname, char *mountpoint, t_int portno)
{
struct sockaddr_in server;
struct hostent *hp;
/* variables used for communication with server */
char *sptr = NULL;
char request[STRBUF_SIZE]; /* string to be send to server */
char *url; /* used for relocation */
fd_set fdset;
struct timeval tv;
t_int sockfd; /* socket to server */
t_int relocate, numrelocs = 0;
t_int i, ret, rest, nanswers=0;
char *cpoint = NULL;
t_int eof = 0;
sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sockfd < 0)
{
error("oggamp~: internal error while attempting to open socket");
return (-1);
}
/* connect socket using hostname provided in command line */
server.sin_family = AF_INET;
hp = gethostbyname(hostname);
if (hp == 0)
{
post("oggamp~: bad host?");
sys_closesocket(sockfd);
return (-1);
}
memcpy((char *)&server.sin_addr, (char *)hp->h_addr, hp->h_length);
/* assign client port number */
server.sin_port = htons((unsigned short)portno);
/* try to connect. */
post("oggamp~: connecting to http://%s:%d/%s", hostname, portno, mountpoint);
if (connect(sockfd, (struct sockaddr *) &server, sizeof (server)) < 0)
{
error("oggamp~: connection failed!\n");
sys_closesocket(sockfd);
return (-1);
}
/* sheck if we can read/write from/to the socket */
FD_ZERO( &fdset);
FD_SET( sockfd, &fdset);
tv.tv_sec = 0; /* seconds */
tv.tv_usec = 500; /* microseconds */
ret = select(sockfd + 1, &fdset, NULL, NULL, &tv);
if(ret != 0)
{
error("oggamp~: can not read from socket");
sys_closesocket(sockfd);
return (-1);
}
/* build up stuff we need to send to server */
sprintf(request, "GET /%s HTTP/1.0 \r\nHost: %s\r\nUser-Agent: oggamp~ 0.2\r\nAccept: audio/x-ogg\r\n\r\n",
mountpoint, hostname);
if ( send(sockfd, request, strlen(request), 0) < 0 ) /* say hello to server */
{
post("oggamp~: could not contact server...");
return (-1);
}
/* read first line of response */
i = 0;
while(i < STRBUF_SIZE - 1)
{
if(oggamp_check_for_data(sockfd))
{
if (recv(sockfd, request + i, 1, 0) <= 0)
{
error("oggamp~: could not read from socket, quitting");
sys_closesocket(sockfd);
return (-1);
}
if (request[i] == '\n')
break;
if (request[i] != '\r')
i++;
}
}
request[i] = '\0';
/* time to parse content of the response... */
if(strstr(request, "HTTP/1.0 200 OK")) /* server is ready */
{
post("oggamp~: IceCast2 server detected");
while(!eof) /* read everything we can get */
{
i = 0;
while(i < STRBUF_SIZE - 1)
{
if(oggamp_check_for_data(sockfd))
{
if (recv(sockfd, request + i, 1, 0) <= 0)
{
error("oggamp~: could not read from socket, quitting");
sys_closesocket(sockfd);
return (-1);
}
if(request[i] == '\n') /* leave at end of line */
break;
if(request[i] == 0x0A) /* leave at end of line */
break;
if(request[i] != '\r') /* go on until 'return' */
i++;
}
}
request[i] = '\0'; /* make it a null terminated string */
if(sptr = strstr(request, "application/x-ogg"))
{ /* check for content type */
post("oggamp~: Ogg Vorbis stream found");
}
if(sptr = strstr(request, "ice-name:"))
{ /* display ice-name */
post("oggamp~: \"%s\"", sptr + 10);
}
if(i == 0)eof = 1; /* we got last '\r\n' from server */
}
}
else /* wrong server or wrong answer */
{
post("oggamp~: unknown response from server");
sys_closesocket(sockfd);
return (-1);
}
post("oggamp~: connected to http://%s:%d/%s", hp->h_name, portno, mountpoint);
return (sockfd);
}
static void oggamp_child_dographics(t_oggamp *x)
{
/* do graphics stuff :: create rectangle */
if ( x->x_graphic && glist_isvisible( x->x_canvas ) )
{
sys_vgui(".x%x.c create rectangle %d %d %d %d -fill lightblue -tags %xPBAR\n",
x->x_canvas, x->x_obj.te_xpix, x->x_obj.te_ypix-OBJHEIGHT-1,
x->x_obj.te_xpix + OBJWIDTH, x->x_obj.te_ypix - 1, x );
}
}
static void oggamp_child_updategraphics(t_oggamp *x)
{
/* update buffer status display */
if(x->x_graphic && glist_isvisible(x->x_canvas))
{
/* update graphical read status */
char color[32];
sys_vgui(".x%x.c delete rectangle %xSTATUS\n", x->x_canvas, x);
if(x->x_fifobytes < (x->x_fifosize / 8))
{
strcpy(color, "red");
}
else
{
strcpy(color, "lightgreen");
}
sys_vgui(".x%x.c create rectangle %d %d %d %d -fill %s -tags %xSTATUS\n",
x->x_canvas, x->x_obj.te_xpix, x->x_obj.te_ypix-OBJHEIGHT-1,
x->x_obj.te_xpix+((x->x_fifobytes*OBJWIDTH)/x->x_fifosize),
x->x_obj.te_ypix - 1, color, x);
}
}
static void oggamp_child_delgraphics(t_oggamp *x)
{
if(x->x_graphic) /* delete graphics */
{
sys_vgui(".x%x.c delete rectangle %xPBAR\n", x->x_canvas, x );
sys_vgui(".x%x.c delete rectangle %xSTATUS\n", x->x_canvas, x );
}
}
static void oggamp_child_disconnect(t_int fd)
{
sys_closesocket(fd);
post("oggamp~: connection closed");
}
/************** the child thread which performs data I/O ***********/
#if 0 /* set this to get debugging output */
static void pute(char *s) /* debug routine */
{
write(2, s, strlen(s));
}
#else
#define pute(x)
#endif
#if 1
#define oggamp_cond_wait pthread_cond_wait
#define oggamp_cond_signal pthread_cond_signal
#else
#include <sys/time.h> /* debugging version... */
#include <sys/types.h>
static void oggamp_fakewait(pthread_mutex_t *b)
{
struct timeval timout;
timout.tv_sec = 0;
timout.tv_usec = 1000000;
pthread_mutex_unlock(b);
select(0, 0, 0, 0, &timout);
pthread_mutex_lock(b);
}
void oggamp_banana( void)
{
struct timeval timout;
timout.tv_sec = 0;
timout.tv_usec = 200000;
pute("banana1\n");
select(0, 0, 0, 0, &timout);
pute("banana2\n");
}
#define oggamp_cond_wait(a,b) oggamp_fakewait(b)
#define oggamp_cond_signal(a)
#endif
static void *oggamp_child_main(void *zz)
{
t_oggamp *x = zz;
pute("1\n");
pthread_mutex_lock(&x->x_mutex);
while (1)
{
int fd, fifohead;
char *buffer; /* Ogg Vorbis data */
float *buf; /* encoded PCM floats */
pute("0\n");
if (x->x_requestcode == REQUEST_NOTHING)
{
pute("wait 2\n");
oggamp_cond_signal(&x->x_answercondition);
oggamp_cond_wait(&x->x_requestcondition, &x->x_mutex);
pute("3\n");
}
// connect to Icecast2 server
else if (x->x_requestcode == REQUEST_CONNECT)
{
char boo[80];
int sysrtn, wantbytes;
/* copy connect stuff out of the data structure so we can
relinquish the mutex while we're in oggcast_child_connect(). */
char *hostname = x->x_hostname;
char *mountpoint = x->x_mountpoint;
t_int portno = x->x_port;
x->x_disconnect = 0;
/* alter the request code so that an ensuing "open" will get
noticed. */
pute("4\n");
x->x_requestcode = REQUEST_BUSY;
x->x_connecterror = 0;
/* if there's already a connection open, close it */
if (x->x_fd >= 0)
{
fd = x->x_fd;
pthread_mutex_unlock(&x->x_mutex);
oggamp_child_disconnect(fd);
pthread_mutex_lock(&x->x_mutex);
x->x_connectstate = 0;
clock_delay(x->x_clock, 0);
x->x_fd = -1;
if (x->x_requestcode != REQUEST_BUSY)
goto lost;
}
/* open the socket with the mutex unlocked */
pthread_mutex_unlock(&x->x_mutex);
fd = oggamp_child_connect(hostname, mountpoint, portno);
pthread_mutex_lock(&x->x_mutex);
pute("5\n");
/* copy back into the instance structure. */
x->x_connectstate = 1;
clock_delay(x->x_clock, 0);
x->x_fd = fd;
if (fd < 0)
{
x->x_connecterror = fd;
x->x_eof = 1;
x->x_connectstate = 0;
clock_delay(x->x_clock, 0);
pute("connect failed\n");
goto lost;
}
else
{
/* initialise the decoder */
if(oggamp_vorbis_init(x, fd) != -1)
{
post("oggamp~: decoder initialised");
oggamp_child_dographics(x);
}
else
{
post("oggamp~: could not init decoder");
oggamp_child_disconnect(fd);
post("oggamp~: connection closed due to bitstream error");
x->x_disconnect = 1;
x->x_fd = -1;
x->x_eof = 1;
x->x_connectstate = 0;
clock_delay(x->x_clock, 0);
pute("initialisation failed\n");
goto lost;
}
}
/* check if another request has been made; if so, field it */
if (x->x_requestcode != REQUEST_BUSY)
goto lost;
pute("6\n");
x->x_fifohead = fifohead = 0;
/* set fifosize from bufsize. fifosize must be a
multiple of the number of bytes eaten for each DSP
tick. We pessimistically assume MAXVECSIZE samples
per tick since that could change. There could be a
problem here if the vector size increases while a
stream is being played... */
x->x_fifosize = x->x_bufsize - (x->x_bufsize %
(x->x_streamchannels * 2));
/* arrange for the "request" condition to be signalled x->x_siginterval
times per buffer */
sprintf(boo, "fifosize %d\n",
x->x_fifosize);
pute(boo);
x->x_sigcountdown = x->x_sigperiod = (x->x_fifosize / (x->x_siginterval * x->x_noutlets * x->x_vecsize));
/* in a loop, wait for the fifo to get hungry and feed it */
while (x->x_requestcode == REQUEST_BUSY)
{
int fifosize = x->x_fifosize;
buf = x->x_buf;
pute("77\n");
if (x->x_eof)
break;
/* try to get new data from decoder whenever
there is some space at end of buffer */
if(x->x_fifobytes < fifosize - READSIZE)
{
sprintf(boo, "head %d, tail %d\n", x->x_fifohead, x->x_fifotail);
pute(boo);
/* we pass x on to the routine since we need the ogg vorbis stuff
to be presend. all other values should not be changed because
mutex is unlocked ! */
pute("decode... ");
pthread_mutex_unlock(&x->x_mutex);
sysrtn = oggamp_decode_input(x, buf, fifohead, fifosize, fd);
oggamp_child_updategraphics(x);
pthread_mutex_lock(&x->x_mutex);
if (x->x_requestcode != REQUEST_BUSY)
break;
if (sysrtn == 0)
{
if (x->x_eos && !x->x_disconnect) /* got end of stream */
{
pute("end of stream\n");
oggamp_vorbis_deinit(x);
if(oggamp_vorbis_init(x, fd) == -1) /* reinit stream */
{
x->x_state = STATE_IDLE;
x->x_disconnect = 1;
goto quit;
}
}
else if (x->x_eos && x->x_disconnect) /* we're disconnecting */
{
pute("end of stream: disconnecting\n");
break; /* go to disconnect */
}
}
else if (sysrtn < 0) /* got any other error from decoder */
{
pute("connecterror\n");
x->x_connecterror = sysrtn;
break;
}
x->x_fifohead = (fifohead + sysrtn) % fifosize;
x->x_fifobytes += sysrtn;
sprintf(boo, "after: head %d, tail %d\n",
x->x_fifohead, x->x_fifotail);
pute(boo);
/* check wether the buffer is filled enough to start streaming */
}
else /* there is enough data in the buffer :: do nothing */
{
x->x_state = STATE_STREAM;
pute("wait 7...\n");
oggamp_cond_signal(&x->x_answercondition);
oggamp_cond_wait(&x->x_requestcondition, &x->x_mutex);
pute("7 done\n");
continue;
}
pute("8\n");
fd = x->x_fd;
buf = x->x_buf;
fifohead = x->x_fifohead;
/* signal parent in case it's waiting for data */
oggamp_cond_signal(&x->x_answercondition);
}
lost:
if (x->x_requestcode == REQUEST_BUSY)
x->x_requestcode = REQUEST_NOTHING;
/* fell out of read loop: close connection if necessary,
set EOF and signal once more */
if (x->x_fd >= 0)
{
fd = x->x_fd;
pthread_mutex_unlock(&x->x_mutex);
oggamp_vorbis_deinit(x);
oggamp_child_disconnect(fd);
pthread_mutex_lock(&x->x_mutex);
x->x_fd = -1;
oggamp_child_delgraphics(x);
}
oggamp_cond_signal(&x->x_answercondition);
}
/* reconnect to server */
else if (x->x_requestcode == REQUEST_RECONNECT)
{
if (x->x_fd >= 0)
{
fd = x->x_fd;
pthread_mutex_unlock(&x->x_mutex);
oggamp_vorbis_deinit(x);
oggamp_child_disconnect(fd);
pthread_mutex_lock(&x->x_mutex);
oggamp_child_delgraphics(x);
x->x_fd = -1;
}
/* connect again */
x->x_requestcode = REQUEST_CONNECT;
x->x_connectstate = 0;
clock_delay(x->x_clock, 0);
oggamp_cond_signal(&x->x_answercondition);
}
/* close connection to server (disconnect) */
else if (x->x_requestcode == REQUEST_CLOSE)
{
quit:
if (x->x_fd >= 0)
{
fd = x->x_fd;
pthread_mutex_unlock(&x->x_mutex);
oggamp_vorbis_deinit(x);
oggamp_child_disconnect(fd);
pthread_mutex_lock(&x->x_mutex);
oggamp_child_delgraphics(x);
x->x_fd = -1;
}
if (x->x_requestcode == REQUEST_CLOSE)
x->x_requestcode = REQUEST_NOTHING;
else if (x->x_requestcode == REQUEST_BUSY)
x->x_requestcode = REQUEST_NOTHING;
else if (x->x_requestcode == REQUEST_CONNECT)
x->x_requestcode = REQUEST_NOTHING;
x->x_connectstate = 0;
clock_delay(x->x_clock, 0);
oggamp_cond_signal(&x->x_answercondition);
}
// quit everything
else if (x->x_requestcode == REQUEST_QUIT)
{
if (x->x_fd >= 0)
{
fd = x->x_fd;
pthread_mutex_unlock(&x->x_mutex);
oggamp_vorbis_deinit(x);
oggamp_child_disconnect(fd);
pthread_mutex_lock(&x->x_mutex);
x->x_fd = -1;
}
x->x_connectstate = 0;
clock_delay(x->x_clock, 0);
x->x_requestcode = REQUEST_NOTHING;
oggamp_cond_signal(&x->x_answercondition);
break;
}
else
{
pute("13\n");
}
}
pute("thread exit\n");
pthread_mutex_unlock(&x->x_mutex);
return (0);
}
/******** the object proper runs in the calling (parent) thread ****/
static void oggamp_tick(t_oggamp *x)
{
outlet_float(x->x_connection, x->x_connectstate);
}
static void *oggamp_new(t_floatarg fdographics, t_floatarg fnchannels, t_floatarg fbufsize)
{
t_oggamp *x;
int nchannels = fnchannels, bufsize = fbufsize * 1024, i;
float *buf;
if (nchannels < 1)
nchannels = 2; /* two channels as default */
else if (nchannels > MAXSTREAMCHANS)
nchannels = MAXSTREAMCHANS;
/* check / set buffer size */
if (!bufsize) bufsize = DEFBUFPERCHAN * nchannels;
else if (bufsize < MINBUFSIZE)
bufsize = MINBUFSIZE;
else if (bufsize > MAXBUFSIZE)
bufsize = MAXBUFSIZE;
buf = getbytes(bufsize*sizeof(t_float));
if (!buf) return (0);
x = (t_oggamp *)pd_new(oggamp_class);
for (i = 0; i < nchannels; i++)
outlet_new(&x->x_obj, gensym("signal"));
x->x_noutlets = nchannels;
x->x_connection = outlet_new(&x->x_obj, gensym("float"));
x->x_clock = clock_new(x, (t_method)oggamp_tick);
x->x_outvec = (t_sample **)getbytes(nchannels * sizeof(t_sample *));
pthread_mutex_init(&x->x_mutex, 0);
pthread_cond_init(&x->x_requestcondition, 0);
pthread_cond_init(&x->x_answercondition, 0);
x->x_vecsize = 2;
x->x_disconnect = 0;
x->x_state = STATE_IDLE;
x->x_canvas = canvas_getcurrent();
x->x_streamchannels = 2;
x->x_fd = -1;
x->x_buf = buf;
x->x_bufsize = bufsize;
x->x_siginterval = 16; /* signal 16 times per buffer */
x->x_fifosize = x->x_fifohead = x->x_fifotail = x->x_fifobytes = x->x_requestcode = 0;
x->x_connectstate = 0; /* indicating state of connection */
x->x_samplerate = x->x_streamrate = sys_getsr();
x->x_resample = 0;
x->x_vorbis = 0;
x->x_sync = 0;
x->x_recover = -1; /* just ignore buffer underruns */
/* graphical buffer status display */
x->x_graphic = (int)fdographics;
x->x_canvas = canvas_getcurrent();
post(oggamp_version);
post("oggamp~: set buffer to %dk bytes", bufsize/1024);
/* start child thread */
pthread_create(&x->x_childthread, 0, oggamp_child_main, x);
return (x);
}
static t_int *oggamp_perform(t_int *w)
{
t_oggamp *x = (t_oggamp *)(w[1]);
t_int vecsize = x->x_vecsize, noutlets = x->x_noutlets, i, j, r;
t_float *fp;
t_float *buffer = x->x_buf;
if (x->x_state == STATE_STREAM)
{
t_int wantbytes, getbytes, havebytes, nchannels, streamchannels = x->x_streamchannels;
pthread_mutex_lock(&x->x_mutex);
/* get 'getbytes' bytes from input buffer, convert them to
'wantbytes' which is the number of bytes after resampling */
wantbytes = noutlets * vecsize; /* number of bytes we get after resampling */
havebytes = x->x_fifobytes;
/* check for error */
if(havebytes < wantbytes)
{
if(x->x_connecterror)
{ /* report error and close connection */
pd_error(x, "dsp: error %d", x->x_connecterror);
x->x_state = STATE_IDLE;
x->x_requestcode = REQUEST_CLOSE;
x->x_disconnect = 1;
oggamp_cond_signal(&x->x_requestcondition);
pthread_mutex_unlock(&x->x_mutex);
}
if(!x->x_disconnect) /* it's not due to disconnect */
{
if(x->x_recover == 0) /* disconnect */
{
x->x_state = STATE_IDLE;
x->x_requestcode = REQUEST_CLOSE;
x->x_disconnect = 1;
oggamp_cond_signal(&x->x_requestcondition);
pthread_mutex_unlock(&x->x_mutex);
}
else if(x->x_recover == 1) /* reconnect */
{
x->x_state = STATE_IDLE;
x->x_requestcode = REQUEST_RECONNECT;
x->x_disconnect = 1;
oggamp_cond_signal(&x->x_requestcondition);
pthread_mutex_unlock(&x->x_mutex);
}
else /* resume */
{
x->x_state = STATE_IDLE;
x->x_disconnect = 0;
oggamp_cond_signal(&x->x_requestcondition);
pthread_mutex_unlock(&x->x_mutex);
}
}
goto idle;
}
/* output audio */
buffer += x->x_fifotail; /* go to actual audio position */
for(j = 0; j < vecsize; j++)
{
for(i = 0; i < noutlets; i++)
{
x->x_outvec[i][j] = *buffer++;
}
}
x->x_fifotail += wantbytes;
x->x_fifobytes -= wantbytes;
if (x->x_fifotail >= x->x_fifosize)
x->x_fifotail = 0;
/* signal the child thread */
if ((--x->x_sigcountdown) <= 0)
{
oggamp_cond_signal(&x->x_requestcondition);
x->x_sigcountdown = x->x_sigperiod;
}
pthread_mutex_unlock(&x->x_mutex);
}
else
{
idle:
for (i = 0; i < noutlets; i++)
for (j = vecsize, fp = x->x_outvec[i]; j--; )
*fp++ = 0;
}
return (w+2);
}
static void oggamp_disconnect(t_oggamp *x)
{
/* LATER rethink whether you need the mutex just to set a variable? */
pthread_mutex_lock(&x->x_mutex);
x->x_disconnect = 1;
x->x_state = STATE_IDLE;
x->x_requestcode = REQUEST_CLOSE;
oggamp_cond_signal(&x->x_requestcondition);
pthread_mutex_unlock(&x->x_mutex);
}
/* connect method. Called as:
connect <hostname or IP> <mountpoint> <portnumber>
*/
static void oggamp_connect(t_oggamp *x, t_symbol *s, int argc, t_atom *argv)
{
t_symbol *hostsym = atom_getsymbolarg(0, argc, argv);
t_symbol *mountsym = atom_getsymbolarg(1, argc, argv);
t_float portno = atom_getfloatarg(2, argc, argv);
if (!*hostsym->s_name) /* check for hostname */
return;
if (!portno) /* check wether the portnumber is specified */
portno = 8000; /* ...assume port 8000 as standard */
pthread_mutex_lock(&x->x_mutex);
if(x->x_fd == -1)
{
x->x_hostname = hostsym->s_name;
x->x_mountpoint = mountsym->s_name;
x->x_port = portno;
x->x_requestcode = REQUEST_CONNECT;
/* empty buffer */
x->x_fifotail = 0;
x->x_fifohead = 0;
x->x_fifobytes = 0;
x->x_streamchannels = 2;
x->x_eof = 0;
x->x_connecterror = 0;
x->x_state = STATE_STARTUP;
x->x_disconnect = 0;
oggamp_cond_signal(&x->x_requestcondition);
}
else post("oggamp~: already connected");
pthread_mutex_unlock(&x->x_mutex);
}
/* connect using url like "http://localhost:8000/mountpoint" */
static void oggamp_connect_url(t_oggamp *x, t_symbol *url)
{
char *hname, *port;
char *h, *p;
char *hostptr;
char *r_hostptr;
char *pathptr;
char *portptr;
char *p0;
char *defaultportstr = "8000";
t_int stringlength;
t_int portno;
/* strip http:// or ftp:// */
p = url->s_name;
if (strncmp(p, "http://", 7) == 0)
p += 7;
if (strncmp(p, "ftp://", 6) == 0)
p += 6;
hostptr = p;
while (*p && *p != '/') /* look for end of hostname:port */
p++;
p++; /* also skip '/' */
pathptr = p;
r_hostptr = --p;
while (*p && hostptr < p && *p != ':' && *p != ']') /* split at ':' */
p--;
if (!*p || p < hostptr || *p != ':') {
portptr = NULL;
}
else{
portptr = p + 1;
r_hostptr = p - 1;
}
if (*hostptr == '[' && *r_hostptr == ']') {
hostptr++;
r_hostptr--;
}
stringlength = r_hostptr - hostptr + 1;
h = getbytes(stringlength + 1);
if (h == NULL) {
hname = NULL;
port = NULL;
pathptr = NULL;
}
strncpy(h, hostptr, stringlength);
*(h+stringlength) = '\0';
hname = h; /* the hostname */
if (portptr) {
stringlength = (pathptr - portptr);
if(!stringlength) portptr = NULL;
}
if (portptr == NULL) {
portptr = defaultportstr;
stringlength = strlen(defaultportstr);
}
p0 = getbytes(stringlength + 1);
if (p0 == NULL) {
freebytes(h, stringlength + 1);
hname = NULL;
port = NULL;
pathptr = NULL;
}
strncpy(p0, portptr, stringlength);
*(p0 + stringlength) = '\0';
for (p = p0; *p && isdigit((unsigned char) *p); p++) ;
*p = '\0';
port = (unsigned char *) p0;
/* convert port from string to int */
portno = (int)strtol(port, NULL, 10);
freebytes(p0, stringlength + 1);
/* set values and signal child to connect */
pthread_mutex_lock(&x->x_mutex);
if(x->x_fd == -1)
{
x->x_hostname = hname;
x->x_mountpoint = pathptr;
x->x_port = portno;
x->x_requestcode = REQUEST_CONNECT;
x->x_fifotail = 0;
x->x_fifohead = 0;
x->x_fifobytes = 0;
x->x_streamchannels = 2;
x->x_eof = 0;
x->x_connecterror = 0;
x->x_state = STATE_STARTUP;
oggamp_cond_signal(&x->x_requestcondition);
}
else post("oggamp~: already connected");
pthread_mutex_unlock(&x->x_mutex);
}
static void oggamp_float(t_oggamp *x, t_floatarg f)
{
if (f != 0)
{
pthread_mutex_lock(&x->x_mutex);
if(x->x_fd == -1)
{
x->x_requestcode = REQUEST_CONNECT;
x->x_fifotail = 0;
x->x_fifohead = 0;
x->x_fifobytes = 0;
x->x_streamchannels = 2;
x->x_eof = 0;
x->x_connecterror = 0;
x->x_state = STATE_STARTUP;
oggamp_cond_signal(&x->x_requestcondition);
}
else post("oggamp~: already connected");
pthread_mutex_unlock(&x->x_mutex);
}
else oggamp_disconnect(x);
}
static void oggamp_dsp(t_oggamp *x, t_signal **sp)
{
int i, noutlets = x->x_noutlets;
pthread_mutex_lock(&x->x_mutex);
x->x_vecsize = sp[0]->s_n;
x->x_sigperiod = (x->x_fifosize / (x->x_siginterval * x->x_streamchannels * x->x_vecsize));
for (i = 0; i < noutlets; i++)
x->x_outvec[i] = sp[i]->s_vec;
pthread_mutex_unlock(&x->x_mutex);
dsp_add(oggamp_perform, 1, x);
}
static void oggamp_print(t_oggamp *x)
{
pthread_mutex_lock(&x->x_mutex);
if(x->x_fd >= 0)
{
post("oggamp~: connected to http://%s:%d/%s", x->x_hostname, x->x_port, x->x_mountpoint);
post("oggamp~: bitstream is %d channels @ %ld Hz with %ldkbps nominal bitrate",
x->x_streamchannels, x->x_streamrate, x->x_vi.bitrate_nominal / 1000);
} else post("oggamp~: not connected");
if(x->x_recover == 0)
post("oggamp~: recover mode set to \"disconnect\" (0)");
else if(x->x_recover == 1)
post("oggamp~: recover mode set to \"reconnect\" (1)");
else if(x->x_recover == -1)
post("oggamp~: recover mode set to \"resume\" (-1)");
pthread_mutex_unlock(&x->x_mutex);
}
/* set behavior for buffer underruns */
static void oggamp_recover(t_oggamp *x, t_floatarg f)
{
pthread_mutex_lock(&x->x_mutex);
if(f <= -1)
{ /* mute audio and try to fill buffer again: the default */
post("oggamp~: set recover mode to \"resume\" (-1)");
f = -1;
}
else if(f >= 1)
{ /* reconnect to server */
post("oggamp~: set recover mode to \"reconnect\" (1)");
f = 1;
}
else
{ /* disconnect from server */
post("oggamp~: set recover mode to \"disconnect\" (0)");
f = 0;
}
x->x_recover = f;
pthread_mutex_unlock(&x->x_mutex);
}
static void oggamp_free(t_oggamp *x)
{
/* request QUIT and wait for acknowledge */
void *threadrtn;
pthread_mutex_lock(&x->x_mutex);
x->x_requestcode = REQUEST_QUIT;
x->x_disconnect = 1;
post("stopping oggamp thread...");
oggamp_cond_signal(&x->x_requestcondition);
while (x->x_requestcode != REQUEST_NOTHING)
{
post("signalling...");
oggamp_cond_signal(&x->x_requestcondition);
oggamp_cond_wait(&x->x_answercondition, &x->x_mutex);
}
pthread_mutex_unlock(&x->x_mutex);
if (pthread_join(x->x_childthread, &threadrtn))
error("oggamp_free: join failed");
post("... done.");
pthread_cond_destroy(&x->x_requestcondition);
pthread_cond_destroy(&x->x_answercondition);
pthread_mutex_destroy(&x->x_mutex);
freebytes(x->x_buf, x->x_bufsize*sizeof(t_float));
freebytes(x->x_outvec, x->x_noutlets * sizeof(t_sample *));
clock_free(x->x_clock);
}
void oggamp_tilde_setup(void)
{
oggamp_class = class_new(gensym("oggamp~"), (t_newmethod)oggamp_new,
(t_method)oggamp_free, sizeof(t_oggamp), 0, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0);
class_addfloat(oggamp_class, (t_method)oggamp_float);
class_addmethod(oggamp_class, (t_method)oggamp_disconnect, gensym("disconnect"), 0);
class_addmethod(oggamp_class, (t_method)oggamp_dsp, gensym("dsp"), 0);
class_addmethod(oggamp_class, (t_method)oggamp_connect, gensym("connect"), A_GIMME, 0);
class_addmethod(oggamp_class, (t_method)oggamp_connect_url, gensym("connecturl"), A_SYMBOL, 0);
class_addmethod(oggamp_class, (t_method)oggamp_recover, gensym("recover"), A_FLOAT, 0);
class_addmethod(oggamp_class, (t_method)oggamp_print, gensym("print"), 0);
}
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