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mpv/stream/stream.c

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/*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifndef __MINGW32__
#include <sys/ioctl.h>
#include <sys/wait.h>
#endif
#include <fcntl.h>
#include <strings.h>
#include <assert.h>
#include <libavutil/intreadwrite.h>
#include <libavutil/common.h>
#include "talloc.h"
#include "config.h"
#if HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
#include "mp_msg.h"
#include "osdep/shmem.h"
#include "osdep/timer.h"
#include "network.h"
#include "stream.h"
#include "libmpdemux/demuxer.h"
#include "m_option.h"
#include "m_struct.h"
#include "cache2.h"
struct input_ctx;
static int (*stream_check_interrupt_cb)(struct input_ctx *ctx, int time);
static struct input_ctx *stream_check_interrupt_ctx;
extern const stream_info_t stream_info_vcd;
extern const stream_info_t stream_info_cdda;
extern const stream_info_t stream_info_netstream;
extern const stream_info_t stream_info_asf;
extern const stream_info_t stream_info_udp;
extern const stream_info_t stream_info_http1;
extern const stream_info_t stream_info_http2;
extern const stream_info_t stream_info_dvb;
extern const stream_info_t stream_info_tv;
extern const stream_info_t stream_info_radio;
extern const stream_info_t stream_info_pvr;
extern const stream_info_t stream_info_ftp;
extern const stream_info_t stream_info_vstream;
extern const stream_info_t stream_info_smb;
extern const stream_info_t stream_info_null;
extern const stream_info_t stream_info_mf;
extern const stream_info_t stream_info_ffmpeg;
extern const stream_info_t stream_info_file;
extern const stream_info_t stream_info_ifo;
extern const stream_info_t stream_info_dvd;
extern const stream_info_t stream_info_bluray;
static const stream_info_t* const auto_open_streams[] = {
#ifdef CONFIG_VCD
&stream_info_vcd,
#endif
#ifdef CONFIG_CDDA
&stream_info_cdda,
#endif
#ifdef CONFIG_NETWORKING
&stream_info_netstream,
&stream_info_http1,
&stream_info_asf,
&stream_info_udp,
&stream_info_http2,
#endif
#ifdef CONFIG_DVBIN
&stream_info_dvb,
#endif
#ifdef CONFIG_TV
&stream_info_tv,
#endif
#ifdef CONFIG_RADIO
&stream_info_radio,
#endif
#ifdef CONFIG_PVR
&stream_info_pvr,
#endif
#ifdef CONFIG_FTP
&stream_info_ftp,
#endif
#ifdef CONFIG_VSTREAM
&stream_info_vstream,
#endif
#ifdef CONFIG_LIBSMBCLIENT
&stream_info_smb,
#endif
#ifdef CONFIG_DVDREAD
&stream_info_ifo,
&stream_info_dvd,
#endif
#ifdef CONFIG_LIBBLURAY
&stream_info_bluray,
#endif
&stream_info_ffmpeg,
&stream_info_null,
&stream_info_mf,
&stream_info_file,
NULL
};
static stream_t *open_stream_plugin(const stream_info_t *sinfo,
const char *filename,
int mode, struct MPOpts *options,
int *file_format, int *ret,
char **redirected_url)
{
void* arg = NULL;
stream_t* s;
m_struct_t* desc = (m_struct_t*)sinfo->opts;
// Parse options
if(desc) {
arg = m_struct_alloc(desc);
if(sinfo->opts_url) {
m_option_t url_opt =
{ "stream url", arg , CONF_TYPE_CUSTOM_URL, 0, 0 ,0, (void *)sinfo->opts };
if (m_option_parse(&url_opt, bstr0("stream url"), bstr0(filename), arg) < 0) {
mp_tmsg(MSGT_OPEN,MSGL_ERR, "URL parsing failed on url %s\n",filename);
m_struct_free(desc,arg);
return NULL;
}
}
}
s = new_stream(-2,-2);
s->opts = options;
s->url=strdup(filename);
s->flags |= mode;
*ret = sinfo->open(s,mode,arg,file_format);
if((*ret) != STREAM_OK) {
#ifdef CONFIG_NETWORKING
if (*ret == STREAM_REDIRECTED && redirected_url) {
if (s->streaming_ctrl && s->streaming_ctrl->url
&& s->streaming_ctrl->url->url)
*redirected_url = strdup(s->streaming_ctrl->url->url);
else
*redirected_url = NULL;
}
streaming_ctrl_free(s->streaming_ctrl);
#endif
free(s->url);
free(s);
return NULL;
}
if(s->type <= -2)
mp_msg(MSGT_OPEN,MSGL_WARN, "Warning streams need a type !!!!\n");
if(s->flags & MP_STREAM_SEEK && !s->seek)
s->flags &= ~MP_STREAM_SEEK;
if(s->seek && !(s->flags & MP_STREAM_SEEK))
s->flags |= MP_STREAM_SEEK;
s->mode = mode;
mp_msg(MSGT_OPEN,MSGL_V, "STREAM: [%s] %s\n",sinfo->name,filename);
mp_msg(MSGT_OPEN,MSGL_V, "STREAM: Description: %s\n",sinfo->info);
mp_msg(MSGT_OPEN,MSGL_V, "STREAM: Author: %s\n", sinfo->author);
mp_msg(MSGT_OPEN,MSGL_V, "STREAM: Comment: %s\n", sinfo->comment);
return s;
}
stream_t *open_stream_full(const char *filename, int mode,
struct MPOpts *options, int *file_format)
{
int i,j,l,r;
const stream_info_t* sinfo;
stream_t* s;
char *redirected_url = NULL;
for(i = 0 ; auto_open_streams[i] ; i++) {
sinfo = auto_open_streams[i];
if(!sinfo->protocols) {
mp_msg(MSGT_OPEN,MSGL_WARN, "Stream type %s has protocols == NULL, it's a bug\n", sinfo->name);
continue;
}
for(j = 0 ; sinfo->protocols[j] ; j++) {
l = strlen(sinfo->protocols[j]);
// l == 0 => Don't do protocol matching (ie network and filenames)
if((l == 0 && !strstr(filename, "://")) ||
((strncasecmp(sinfo->protocols[j],filename,l) == 0) &&
(strncmp("://",filename+l,3) == 0))) {
*file_format = DEMUXER_TYPE_UNKNOWN;
s = open_stream_plugin(sinfo,filename,mode,options,file_format,&r,
&redirected_url);
if(s) return s;
if(r == STREAM_REDIRECTED && redirected_url) {
mp_msg(MSGT_OPEN,MSGL_V, "[%s] open %s redirected to %s\n",
sinfo->info, filename, redirected_url);
s = open_stream_full(redirected_url, mode, options, file_format);
free(redirected_url);
return s;
}
else if(r != STREAM_UNSUPPORTED) {
mp_tmsg(MSGT_OPEN,MSGL_ERR, "Failed to open %s.\n",filename);
return NULL;
}
break;
}
}
}
mp_tmsg(MSGT_OPEN,MSGL_ERR, "No stream found to handle url %s\n", filename);
return NULL;
}
stream_t *open_output_stream(const char *filename, struct MPOpts *options)
{
int file_format; //unused
if(!filename) {
mp_msg(MSGT_OPEN,MSGL_ERR,"open_output_stream(), NULL filename, report this bug\n");
return NULL;
}
return open_stream_full(filename,STREAM_WRITE,options,&file_format);
}
//=================== STREAMER =========================
static int stream_reconnect(stream_t *s)
{
#define MAX_RECONNECT_RETRIES 5
#define RECONNECT_SLEEP_MS 1000
int retry = 0;
off_t pos = s->pos;
// Seeking is used as a hack to make network streams
// reopen the connection, ideally they would implement
// e.g. a STREAM_CTRL_RECONNECT to do this
do {
if (retry >= MAX_RECONNECT_RETRIES)
return 0;
if (retry) usec_sleep(RECONNECT_SLEEP_MS * 1000);
retry++;
s->eof=1;
stream_reset(s);
} while (stream_seek_internal(s, pos) >= 0 || s->pos != pos); // seek failed
return 1;
}
int stream_read_internal(stream_t *s, void *buf, int len)
{
int orig_len = len;
// we will retry even if we already reached EOF previously.
switch(s->type){
case STREAMTYPE_STREAM:
#ifdef CONFIG_NETWORKING
if( s->streaming_ctrl!=NULL && s->streaming_ctrl->streaming_read ) {
len=s->streaming_ctrl->streaming_read(s->fd, buf, len, s->streaming_ctrl);
if (s->streaming_ctrl->status == streaming_stopped_e &&
(!s->end_pos || s->pos == s->end_pos))
s->eof = 1;
} else
#endif
if (s->fill_buffer)
len = s->fill_buffer(s, buf, len);
else
len = read(s->fd, buf, len);
break;
case STREAMTYPE_DS:
len = demux_read_data((demux_stream_t*)s->priv, buf, len);
break;
default:
len= s->fill_buffer ? s->fill_buffer(s, buf, len) : 0;
}
if(len<=0){
// do not retry if this looks like proper eof
if (s->eof || (s->end_pos && s->pos == s->end_pos))
goto eof_out;
// just in case this is an error e.g. due to network
// timeout reset and retry
if (!stream_reconnect(s))
goto eof_out;
// make sure EOF is set to ensure no endless loops
s->eof=1;
return stream_read_internal(s, buf, orig_len);
eof_out:
s->eof=1;
return 0;
}
// When reading succeeded we are obviously not at eof.
// This e.g. avoids issues with eof getting stuck when lavf seeks in MPEG-TS
s->eof=0;
s->pos+=len;
return len;
}
int stream_fill_buffer(stream_t *s){
int len = stream_read_internal(s, s->buffer, STREAM_BUFFER_SIZE);
if (len <= 0)
return 0;
s->buf_pos=0;
s->buf_len=len;
// printf("[%d]",len);fflush(stdout);
return len;
}
int stream_write_buffer(stream_t *s, unsigned char *buf, int len) {
int rd;
if(!s->write_buffer)
return -1;
rd = s->write_buffer(s, buf, len);
if(rd < 0)
return -1;
s->pos += rd;
assert(rd == len && "stream_write_buffer(): unexpected short write");
return rd;
}
int stream_seek_internal(stream_t *s, off_t newpos)
{
if(newpos==0 || newpos!=s->pos){
switch(s->type){
case STREAMTYPE_STREAM:
//s->pos=newpos; // real seek
// Some streaming protocol allow to seek backward and forward
// A function call that return -1 can tell that the protocol
// doesn't support seeking.
#ifdef CONFIG_NETWORKING
if(s->seek) { // new stream seek is much cleaner than streaming_ctrl one
if(!s->seek(s,newpos)) {
mp_tmsg(MSGT_STREAM,MSGL_ERR, "Seek failed\n");
return 0;
}
break;
}
if( s->streaming_ctrl!=NULL && s->streaming_ctrl->streaming_seek ) {
if( s->streaming_ctrl->streaming_seek( s->fd, newpos, s->streaming_ctrl )<0 ) {
mp_tmsg(MSGT_STREAM,MSGL_INFO,"Stream not seekable!\n");
return 1;
}
break;
}
#endif
if(newpos<s->pos){
mp_tmsg(MSGT_STREAM, MSGL_INFO,
"Cannot seek backward in linear streams!\n");
return 1;
}
break;
default:
// This should at the beginning as soon as all streams are converted
if(!s->seek)
return 0;
// Now seek
if(!s->seek(s,newpos)) {
mp_tmsg(MSGT_STREAM,MSGL_ERR, "Seek failed\n");
return 0;
}
}
// putchar('.');fflush(stdout);
//} else {
// putchar('%');fflush(stdout);
}
return -1;
}
int stream_seek_long(stream_t *s,off_t pos){
int res;
off_t newpos=0;
// if( mp_msg_test(MSGT_STREAM,MSGL_DBG3) ) printf("seek_long to 0x%X\n",(unsigned int)pos);
s->buf_pos=s->buf_len=0;
if(s->mode == STREAM_WRITE) {
if(!s->seek || !s->seek(s,pos))
return 0;
return 1;
}
if(s->sector_size)
newpos = (pos/s->sector_size)*s->sector_size;
else
newpos = pos&(~((off_t)STREAM_BUFFER_SIZE-1));
if( mp_msg_test(MSGT_STREAM,MSGL_DBG3) ){
mp_msg(MSGT_STREAM,MSGL_DBG3, "s->pos=%"PRIX64" newpos=%"PRIX64" new_bufpos=%"PRIX64" buflen=%X \n",
(int64_t)s->pos,(int64_t)newpos,(int64_t)pos,s->buf_len);
}
pos-=newpos;
res = stream_seek_internal(s, newpos);
if (res >= 0)
return res;
while(s->pos<newpos){
if(stream_fill_buffer(s)<=0) break; // EOF
}
s->eof = 0; // EOF reset when seek succeeds.
while (stream_fill_buffer(s) > 0) {
if(pos<=s->buf_len){
s->buf_pos=pos; // byte position in sector
return 1;
}
pos -= s->buf_len;
}
// Fill failed, but seek still is a success.
s->pos += pos;
s->buf_pos = 0;
s->buf_len = 0;
mp_msg(MSGT_STREAM,MSGL_V,
"stream_seek: Seek to/past EOF: no buffer preloaded.\n");
return 1;
}
void stream_reset(stream_t *s){
if(s->eof){
s->pos=0;
s->buf_pos=s->buf_len=0;
s->eof=0;
}
if(s->control) s->control(s,STREAM_CTRL_RESET,NULL);
//stream_seek(s,0);
}
int stream_control(stream_t *s, int cmd, void *arg){
if(!s->control) return STREAM_UNSUPPORTED;
#ifdef CONFIG_STREAM_CACHE
if (s->cache_pid)
return cache_do_control(s, cmd, arg);
#endif
return s->control(s, cmd, arg);
}
stream_t* new_memory_stream(unsigned char* data,int len){
stream_t *s;
if(len < 0)
return NULL;
s=calloc(1, sizeof(stream_t)+len);
s->fd=-1;
s->type=STREAMTYPE_MEMORY;
s->buf_pos=0; s->buf_len=len;
s->start_pos=0; s->end_pos=len;
stream_reset(s);
s->pos=len;
memcpy(s->buffer,data,len);
return s;
}
stream_t* new_stream(int fd,int type){
stream_t *s=calloc(1, sizeof(stream_t));
if(s==NULL) return NULL;
#if HAVE_WINSOCK2_H
{
WSADATA wsdata;
int temp = WSAStartup(0x0202, &wsdata); // there might be a better place for this (-> later)
mp_msg(MSGT_STREAM,MSGL_V,"WINSOCK2 init: %i\n", temp);
}
#endif
s->fd=fd;
s->type=type;
s->buf_pos=s->buf_len=0;
s->start_pos=s->end_pos=0;
s->priv=NULL;
s->url=NULL;
s->cache_pid=0;
stream_reset(s);
return s;
}
void free_stream(stream_t *s){
// printf("\n*** free_stream() called ***\n");
#ifdef CONFIG_STREAM_CACHE
cache_uninit(s);
#endif
if(s->close) s->close(s);
if(s->fd>0){
/* on unix we define closesocket to close
on windows however we have to distinguish between
network socket and file */
if(s->url && strstr(s->url,"://"))
closesocket(s->fd);
else close(s->fd);
}
#if HAVE_WINSOCK2_H
mp_msg(MSGT_STREAM,MSGL_V,"WINSOCK2 uninit\n");
WSACleanup(); // there might be a better place for this (-> later)
#endif
// Disabled atm, i don't like that. s->priv can be anything after all
// streams should destroy their priv on close
//free(s->priv);
free(s->url);
free(s);
}
stream_t* new_ds_stream(demux_stream_t *ds) {
stream_t* s = new_stream(-1,STREAMTYPE_DS);
s->priv = ds;
return s;
}
void stream_set_interrupt_callback(int (*cb)(struct input_ctx *, int),
struct input_ctx *ctx)
{
stream_check_interrupt_cb = cb;
stream_check_interrupt_ctx = ctx;
}
int stream_check_interrupt(int time) {
if(!stream_check_interrupt_cb) {
usec_sleep(time * 1000);
return 0;
}
return stream_check_interrupt_cb(stream_check_interrupt_ctx, time);
}
/**
* Helper function to read 16 bits little-endian and advance pointer
*/
static uint16_t get_le16_inc(const uint8_t **buf)
{
uint16_t v = AV_RL16(*buf);
*buf += 2;
return v;
}
/**
* Helper function to read 16 bits big-endian and advance pointer
*/
static uint16_t get_be16_inc(const uint8_t **buf)
{
uint16_t v = AV_RB16(*buf);
*buf += 2;
return v;
}
/**
* Find a newline character in buffer
* \param buf buffer to search
* \param len amount of bytes to search in buffer, may not overread
* \param utf16 chose between UTF-8/ASCII/other and LE and BE UTF-16
* 0 = UTF-8/ASCII/other, 1 = UTF-16-LE, 2 = UTF-16-BE
*/
static const uint8_t *find_newline(const uint8_t *buf, int len, int utf16)
{
uint32_t c;
const uint8_t *end = buf + len;
switch (utf16) {
case 0:
return (uint8_t *)memchr(buf, '\n', len);
case 1:
while (buf < end - 1) {
GET_UTF16(c, buf < end - 1 ? get_le16_inc(&buf) : 0, return NULL;)
if (buf <= end && c == '\n')
return buf - 1;
}
break;
case 2:
while (buf < end - 1) {
GET_UTF16(c, buf < end - 1 ? get_be16_inc(&buf) : 0, return NULL;)
if (buf <= end && c == '\n')
return buf - 1;
}
break;
}
return NULL;
}
/**
* Copy a number of bytes, converting to UTF-8 if input is UTF-16
* \param dst buffer to copy to
* \param dstsize size of dst buffer
* \param src buffer to copy from
* \param len amount of bytes to copy from src
* \param utf16 chose between UTF-8/ASCII/other and LE and BE UTF-16
* 0 = UTF-8/ASCII/other, 1 = UTF-16-LE, 2 = UTF-16-BE
*/
static int copy_characters(uint8_t *dst, int dstsize,
const uint8_t *src, int *len, int utf16)
{
uint32_t c;
uint8_t *dst_end = dst + dstsize;
const uint8_t *end = src + *len;
switch (utf16) {
case 0:
if (*len > dstsize)
*len = dstsize;
memcpy(dst, src, *len);
return *len;
case 1:
while (src < end - 1 && dst_end - dst > 8) {
uint8_t tmp;
GET_UTF16(c, src < end - 1 ? get_le16_inc(&src) : 0, ;)
PUT_UTF8(c, tmp, *dst++ = tmp;)
}
*len -= end - src;
return dstsize - (dst_end - dst);
case 2:
while (src < end - 1 && dst_end - dst > 8) {
uint8_t tmp;
GET_UTF16(c, src < end - 1 ? get_be16_inc(&src) : 0, ;)
PUT_UTF8(c, tmp, *dst++ = tmp;)
}
*len -= end - src;
return dstsize - (dst_end - dst);
}
return 0;
}
unsigned char* stream_read_line(stream_t *s,unsigned char* mem, int max, int utf16) {
int len;
const unsigned char *end;
unsigned char *ptr = mem;
if (max < 1) return NULL;
max--; // reserve one for 0-termination
do {
len = s->buf_len-s->buf_pos;
// try to fill the buffer
if(len <= 0 &&
(!cache_stream_fill_buffer(s) ||
(len = s->buf_len-s->buf_pos) <= 0)) break;
end = find_newline(s->buffer+s->buf_pos, len, utf16);
if(end) len = end - (s->buffer+s->buf_pos) + 1;
if(len > 0 && max > 0) {
int l = copy_characters(ptr, max, s->buffer+s->buf_pos, &len, utf16);
max -= l;
ptr += l;
if (!len)
break;
}
s->buf_pos += len;
} while(!end);
ptr[0] = 0;
if(s->eof && ptr == mem) return NULL;
return mem;
}
struct bstr stream_read_complete(struct stream *s, void *talloc_ctx,
int max_size, int padding_bytes)
{
if (max_size > 1000000000)
abort();
int bufsize;
int total_read = 0;
int padding = FFMAX(padding_bytes, 1);
char *buf = NULL;
if (s->end_pos > max_size)
return (struct bstr){NULL, 0};
if (s->end_pos > 0)
bufsize = s->end_pos + padding;
else
bufsize = 1000;
while (1) {
buf = talloc_realloc_size(talloc_ctx, buf, bufsize);
int readsize = stream_read(s, buf + total_read, bufsize - total_read);
total_read += readsize;
if (total_read < bufsize)
break;
if (bufsize > max_size) {
talloc_free(buf);
return (struct bstr){NULL, 0};
}
bufsize = FFMIN(bufsize + (bufsize >> 1), max_size + padding);
}
buf = talloc_realloc_size(talloc_ctx, buf, total_read + padding);
return (struct bstr){buf, total_read};
}
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