mirror of https://github.com/mpv-player/mpv
639 lines
18 KiB
C
639 lines
18 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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// Initial draft of my new cache system...
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// Note it runs in 2 processes (using fork()), but doesn't require locking!!
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// TODO: seeking, data consistency checking
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#define READ_SLEEP_TIME 10
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// These defines are used to reduce the cost of many successive
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// seeks (e.g. when a file has no index) by spinning quickly at first.
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#define INITIAL_FILL_USLEEP_TIME 1000
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#define INITIAL_FILL_USLEEP_COUNT 10
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#define FILL_USLEEP_TIME 50000
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#define PREFILL_SLEEP_TIME 200
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#define CONTROL_SLEEP_TIME 0
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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 <signal.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <errno.h>
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#include "libavutil/avutil.h"
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#include "osdep/shmem.h"
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#include "osdep/timer.h"
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#if defined(__MINGW32__)
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#include <windows.h>
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static void ThreadProc( void *s );
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#elif defined(__OS2__)
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#define INCL_DOS
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#include <os2.h>
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static void ThreadProc( void *s );
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#elif defined(PTHREAD_CACHE)
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#include <pthread.h>
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static void *ThreadProc(void *s);
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#else
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#include <sys/wait.h>
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#define FORKED_CACHE 1
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#endif
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#ifndef FORKED_CACHE
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#define FORKED_CACHE 0
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#endif
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#include "mp_msg.h"
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#include "stream.h"
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#include "cache2.h"
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#include "mpcommon.h"
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typedef struct {
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// constats:
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unsigned char *buffer; // base pointer of the allocated buffer memory
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int buffer_size; // size of the allocated buffer memory
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int sector_size; // size of a single sector (2048/2324)
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int back_size; // we should keep back_size amount of old bytes for backward seek
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int fill_limit; // we should fill buffer only if space>=fill_limit
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int seek_limit; // keep filling cache if distance is less that seek limit
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// filler's pointers:
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int eof;
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off_t min_filepos; // buffer contain only a part of the file, from min-max pos
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off_t max_filepos;
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off_t offset; // filepos <-> bufferpos offset value (filepos of the buffer's first byte)
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// reader's pointers:
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off_t read_filepos;
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// commands/locking:
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// int seek_lock; // 1 if we will seek/reset buffer, 2 if we are ready for cmd
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// int fifo_flag; // 1 if we should use FIFO to notice cache about buffer reads.
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// callback
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stream_t* stream;
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volatile int control;
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volatile unsigned control_uint_arg;
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volatile double control_double_arg;
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volatile int control_res;
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volatile off_t control_new_pos;
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volatile double stream_time_length;
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volatile double stream_time_pos;
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} cache_vars_t;
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static int min_fill=0;
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static void cache_wakeup(stream_t *s)
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{
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#if FORKED_CACHE
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// signal process to wake up immediately
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kill(s->cache_pid, SIGUSR1);
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#endif
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}
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static int cache_read(cache_vars_t *s, unsigned char *buf, int size)
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{
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int total=0;
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int sleep_count = 0;
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int last_max = s->max_filepos;
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while(size>0){
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int pos,newb,len;
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//printf("CACHE2_READ: 0x%X <= 0x%X <= 0x%X \n",s->min_filepos,s->read_filepos,s->max_filepos);
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if(s->read_filepos>=s->max_filepos || s->read_filepos<s->min_filepos){
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// eof?
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if(s->eof) break;
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if (s->max_filepos == last_max) {
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if (sleep_count++ == 10)
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mp_msg(MSGT_CACHE, MSGL_WARN, "Cache not filling, consider increasing -cache and/or -cache-min!\n");
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} else {
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last_max = s->max_filepos;
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sleep_count = 0;
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}
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// waiting for buffer fill...
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if (stream_check_interrupt(READ_SLEEP_TIME)) {
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s->eof = 1;
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break;
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}
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continue; // try again...
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}
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sleep_count = 0;
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newb=s->max_filepos-s->read_filepos; // new bytes in the buffer
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if(newb<min_fill) min_fill=newb; // statistics...
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// printf("*** newb: %d bytes ***\n",newb);
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pos=s->read_filepos - s->offset;
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if(pos<0) pos+=s->buffer_size; else
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if(pos>=s->buffer_size) pos-=s->buffer_size;
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if(newb>s->buffer_size-pos) newb=s->buffer_size-pos; // handle wrap...
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if(newb>size) newb=size;
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// check:
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if(s->read_filepos<s->min_filepos) mp_msg(MSGT_CACHE,MSGL_ERR,"Ehh. s->read_filepos<s->min_filepos !!! Report bug...\n");
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// len=write(mem,newb)
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//printf("Buffer read: %d bytes\n",newb);
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memcpy(buf,&s->buffer[pos],newb);
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buf+=newb;
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len=newb;
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// ...
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s->read_filepos+=len;
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size-=len;
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total+=len;
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}
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return total;
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}
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static int cache_fill(cache_vars_t *s)
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{
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int back,back2,newb,space,len,pos;
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off_t read=s->read_filepos;
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int read_chunk;
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int wraparound_copy = 0;
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if(read<s->min_filepos || read>s->max_filepos){
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// seek...
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mp_msg(MSGT_CACHE,MSGL_DBG2,"Out of boundaries... seeking to 0x%"PRIX64" \n",(int64_t)read);
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// drop cache contents only if seeking backward or too much fwd.
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// This is also done for on-disk files, since it loses the backseek cache.
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// That in turn can cause major bandwidth increase and performance
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// issues with e.g. mov or badly interleaved files
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if(read<s->min_filepos || read>=s->max_filepos+s->seek_limit)
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{
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s->offset= // FIXME!?
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s->min_filepos=s->max_filepos=read; // drop cache content :(
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if(s->stream->eof) stream_reset(s->stream);
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stream_seek_internal(s->stream,read);
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mp_msg(MSGT_CACHE,MSGL_DBG2,"Seek done. new pos: 0x%"PRIX64" \n",(int64_t)stream_tell(s->stream));
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}
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}
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// calc number of back-bytes:
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back=read - s->min_filepos;
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if(back<0) back=0; // strange...
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if(back>s->back_size) back=s->back_size;
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// calc number of new bytes:
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newb=s->max_filepos - read;
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if(newb<0) newb=0; // strange...
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// calc free buffer space:
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space=s->buffer_size - (newb+back);
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// calc bufferpos:
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pos=s->max_filepos - s->offset;
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if(pos>=s->buffer_size) pos-=s->buffer_size; // wrap-around
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if(space<s->fill_limit){
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// printf("Buffer is full (%d bytes free, limit: %d)\n",space,s->fill_limit);
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return 0; // no fill...
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}
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// printf("### read=0x%X back=%d newb=%d space=%d pos=%d\n",read,back,newb,space,pos);
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// try to avoid wrap-around. If not possible due to sector size
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// do an extra copy.
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if(space>s->buffer_size-pos) {
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if (s->buffer_size-pos >= s->sector_size) {
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space=s->buffer_size-pos;
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} else {
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space = s->sector_size;
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wraparound_copy = 1;
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}
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}
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// limit one-time block size
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read_chunk = s->stream->read_chunk;
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if (!read_chunk) read_chunk = 4*s->sector_size;
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space = FFMIN(space, read_chunk);
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#if 1
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// back+newb+space <= buffer_size
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back2=s->buffer_size-(space+newb); // max back size
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if(s->min_filepos<(read-back2)) s->min_filepos=read-back2;
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#else
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s->min_filepos=read-back; // avoid seeking-back to temp area...
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#endif
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if (wraparound_copy) {
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int to_copy;
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len = stream_read_internal(s->stream, s->stream->buffer, space);
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to_copy = FFMIN(len, s->buffer_size-pos);
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memcpy(s->buffer + pos, s->stream->buffer, to_copy);
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memcpy(s->buffer, s->stream->buffer + to_copy, len - to_copy);
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} else
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len = stream_read_internal(s->stream, &s->buffer[pos], space);
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s->eof= !len;
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s->max_filepos+=len;
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if(pos+len>=s->buffer_size){
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// wrap...
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s->offset+=s->buffer_size;
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}
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return len;
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}
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static int cache_execute_control(cache_vars_t *s) {
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double double_res;
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unsigned uint_res;
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static unsigned last;
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int quit = s->control == -2;
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if (quit || !s->stream->control) {
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s->stream_time_length = 0;
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s->stream_time_pos = MP_NOPTS_VALUE;
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s->control_new_pos = 0;
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s->control_res = STREAM_UNSUPPORTED;
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s->control = -1;
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return !quit;
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}
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if (GetTimerMS() - last > 99) {
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double len, pos;
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if (s->stream->control(s->stream, STREAM_CTRL_GET_TIME_LENGTH, &len) == STREAM_OK)
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s->stream_time_length = len;
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else
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s->stream_time_length = 0;
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if (s->stream->control(s->stream, STREAM_CTRL_GET_CURRENT_TIME, &pos) == STREAM_OK)
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s->stream_time_pos = pos;
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else
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s->stream_time_pos = MP_NOPTS_VALUE;
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last = GetTimerMS();
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}
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if (s->control == -1) return 1;
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switch (s->control) {
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case STREAM_CTRL_SEEK_TO_TIME:
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double_res = s->control_double_arg;
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case STREAM_CTRL_GET_CURRENT_TIME:
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case STREAM_CTRL_GET_ASPECT_RATIO:
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s->control_res = s->stream->control(s->stream, s->control, &double_res);
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s->control_double_arg = double_res;
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break;
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case STREAM_CTRL_SEEK_TO_CHAPTER:
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case STREAM_CTRL_SET_ANGLE:
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uint_res = s->control_uint_arg;
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case STREAM_CTRL_GET_NUM_CHAPTERS:
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case STREAM_CTRL_GET_CURRENT_CHAPTER:
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case STREAM_CTRL_GET_NUM_ANGLES:
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case STREAM_CTRL_GET_ANGLE:
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s->control_res = s->stream->control(s->stream, s->control, &uint_res);
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s->control_uint_arg = uint_res;
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break;
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default:
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s->control_res = STREAM_UNSUPPORTED;
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break;
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}
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s->control_new_pos = s->stream->pos;
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s->control = -1;
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return 1;
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}
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static void *shared_alloc(int size) {
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#if FORKED_CACHE
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return shmem_alloc(size);
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#else
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return malloc(size);
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#endif
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}
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static void shared_free(void *ptr, int size) {
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#if FORKED_CACHE
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shmem_free(ptr, size);
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#else
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free(ptr);
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#endif
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}
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static cache_vars_t* cache_init(int size,int sector){
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int num;
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cache_vars_t* s=shared_alloc(sizeof(cache_vars_t));
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if(s==NULL) return NULL;
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memset(s,0,sizeof(cache_vars_t));
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num=size/sector;
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if(num < 16){
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num = 16;
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}//32kb min_size
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s->buffer_size=num*sector;
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s->sector_size=sector;
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s->buffer=shared_alloc(s->buffer_size);
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if(s->buffer == NULL){
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shared_free(s, sizeof(cache_vars_t));
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return NULL;
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}
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s->fill_limit=8*sector;
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s->back_size=s->buffer_size/2;
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return s;
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}
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void cache_uninit(stream_t *s) {
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cache_vars_t* c = s->cache_data;
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if(s->cache_pid) {
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#if !FORKED_CACHE
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cache_do_control(s, -2, NULL);
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#else
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kill(s->cache_pid,SIGKILL);
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waitpid(s->cache_pid,NULL,0);
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#endif
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s->cache_pid = 0;
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}
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if(!c) return;
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shared_free(c->buffer, c->buffer_size);
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c->buffer = NULL;
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c->stream = NULL;
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shared_free(s->cache_data, sizeof(cache_vars_t));
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s->cache_data = NULL;
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}
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static void exit_sighandler(int x){
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// close stream
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exit(0);
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}
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static void dummy_sighandler(int x) {
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}
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/**
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* Main loop of the cache process or thread.
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*/
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static void cache_mainloop(cache_vars_t *s) {
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int sleep_count = 0;
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#if FORKED_CACHE
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struct sigaction sa = { .sa_handler = SIG_IGN };
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sigaction(SIGUSR1, &sa, NULL);
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#endif
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do {
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if (!cache_fill(s)) {
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#if FORKED_CACHE
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// Let signal wake us up, we cannot leave this
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// enabled since we do not handle EINTR in most places.
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// This might need extra code to work on BSD.
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sa.sa_handler = dummy_sighandler;
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sigaction(SIGUSR1, &sa, NULL);
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#endif
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if (sleep_count < INITIAL_FILL_USLEEP_COUNT) {
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sleep_count++;
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usec_sleep(INITIAL_FILL_USLEEP_TIME);
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} else
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usec_sleep(FILL_USLEEP_TIME); // idle
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#if FORKED_CACHE
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sa.sa_handler = SIG_IGN;
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sigaction(SIGUSR1, &sa, NULL);
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#endif
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} else
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sleep_count = 0;
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} while (cache_execute_control(s));
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}
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/**
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* \return 1 on success, 0 if the function was interrupted and -1 on error
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*/
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int stream_enable_cache(stream_t *stream,int size,int min,int seek_limit){
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int ss = stream->sector_size ? stream->sector_size : STREAM_BUFFER_SIZE;
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int res = -1;
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cache_vars_t* s;
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if (stream->flags & STREAM_NON_CACHEABLE) {
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mp_msg(MSGT_CACHE,MSGL_STATUS,"\rThis stream is non-cacheable\n");
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return 1;
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}
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s=cache_init(size,ss);
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if(s == NULL) return -1;
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stream->cache_data=s;
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s->stream=stream; // callback
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s->seek_limit=seek_limit;
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//make sure that we won't wait from cache_fill
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//more data than it is allowed to fill
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if (s->seek_limit > s->buffer_size - s->fill_limit ){
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s->seek_limit = s->buffer_size - s->fill_limit;
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}
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if (min > s->buffer_size - s->fill_limit) {
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min = s->buffer_size - s->fill_limit;
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}
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// to make sure we wait for the cache process/thread to be active
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// before continuing
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if (min <= 0)
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min = 1;
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#if FORKED_CACHE
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if((stream->cache_pid=fork())){
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if ((pid_t)stream->cache_pid == -1)
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stream->cache_pid = 0;
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#else
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{
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stream_t* stream2=malloc(sizeof(stream_t));
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memcpy(stream2,s->stream,sizeof(stream_t));
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s->stream=stream2;
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#if defined(__MINGW32__)
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stream->cache_pid = _beginthread( ThreadProc, 0, s );
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#elif defined(__OS2__)
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stream->cache_pid = _beginthread( ThreadProc, NULL, 256 * 1024, s );
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#else
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{
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pthread_t tid;
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pthread_create(&tid, NULL, ThreadProc, s);
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stream->cache_pid = 1;
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}
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#endif
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#endif
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if (!stream->cache_pid) {
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mp_msg(MSGT_CACHE, MSGL_ERR,
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"Starting cache process/thread failed: %s.\n", strerror(errno));
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goto err_out;
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}
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// wait until cache is filled at least prefill_init %
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mp_msg(MSGT_CACHE,MSGL_V,"CACHE_PRE_INIT: %"PRId64" [%"PRId64"] %"PRId64" pre:%d eof:%d \n",
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(int64_t)s->min_filepos,(int64_t)s->read_filepos,(int64_t)s->max_filepos,min,s->eof);
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while(s->read_filepos<s->min_filepos || s->max_filepos-s->read_filepos<min){
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mp_tmsg(MSGT_CACHE,MSGL_STATUS,"\rCache fill: %5.2f%% (%"PRId64" bytes) ",
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100.0*(float)(s->max_filepos-s->read_filepos)/(float)(s->buffer_size),
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(int64_t)s->max_filepos-s->read_filepos
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);
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if(s->eof) break; // file is smaller than prefill size
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if(stream_check_interrupt(PREFILL_SLEEP_TIME)) {
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res = 0;
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goto err_out;
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}
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}
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mp_msg(MSGT_CACHE,MSGL_STATUS,"\n");
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return 1; // parent exits
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|
|
|
err_out:
|
|
cache_uninit(stream);
|
|
return res;
|
|
}
|
|
|
|
#if FORKED_CACHE
|
|
signal(SIGTERM,exit_sighandler); // kill
|
|
cache_mainloop(s);
|
|
// make sure forked code never leaves this function
|
|
exit(0);
|
|
#endif
|
|
}
|
|
|
|
#if !FORKED_CACHE
|
|
#if defined(__MINGW32__) || defined(__OS2__)
|
|
static void ThreadProc( void *s ){
|
|
cache_mainloop(s);
|
|
_endthread();
|
|
}
|
|
#else
|
|
static void *ThreadProc( void *s ){
|
|
cache_mainloop(s);
|
|
return NULL;
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
int cache_stream_fill_buffer(stream_t *s){
|
|
int len;
|
|
int sector_size;
|
|
if(!s->cache_pid) return stream_fill_buffer(s);
|
|
|
|
if(s->pos!=((cache_vars_t*)s->cache_data)->read_filepos) mp_msg(MSGT_CACHE,MSGL_ERR,"!!! read_filepos differs!!! report this bug...\n");
|
|
sector_size = ((cache_vars_t*)s->cache_data)->sector_size;
|
|
if (sector_size > STREAM_MAX_SECTOR_SIZE) {
|
|
mp_msg(MSGT_CACHE, MSGL_ERR, "Sector size %i larger than maximum %i\n", sector_size, STREAM_MAX_SECTOR_SIZE);
|
|
sector_size = STREAM_MAX_SECTOR_SIZE;
|
|
}
|
|
|
|
len=cache_read(s->cache_data,s->buffer, sector_size);
|
|
//printf("cache_stream_fill_buffer->read -> %d\n",len);
|
|
|
|
if(len<=0){ s->eof=1; s->buf_pos=s->buf_len=0; return 0; }
|
|
s->eof=0;
|
|
s->buf_pos=0;
|
|
s->buf_len=len;
|
|
s->pos+=len;
|
|
// printf("[%d]",len);fflush(stdout);
|
|
if (s->capture_file)
|
|
stream_capture_do(s);
|
|
return len;
|
|
|
|
}
|
|
|
|
int cache_fill_status(stream_t *s) {
|
|
cache_vars_t *cv;
|
|
if (!s || !s->cache_data)
|
|
return -1;
|
|
cv = s->cache_data;
|
|
return (cv->max_filepos-cv->read_filepos)/(cv->buffer_size / 100);
|
|
}
|
|
|
|
int cache_stream_seek_long(stream_t *stream,off_t pos){
|
|
cache_vars_t* s;
|
|
off_t newpos;
|
|
if(!stream->cache_pid) return stream_seek_long(stream,pos);
|
|
|
|
s=stream->cache_data;
|
|
// s->seek_lock=1;
|
|
|
|
mp_msg(MSGT_CACHE,MSGL_DBG2,"CACHE2_SEEK: 0x%"PRIX64" <= 0x%"PRIX64" (0x%"PRIX64") <= 0x%"PRIX64" \n",s->min_filepos,pos,s->read_filepos,s->max_filepos);
|
|
|
|
newpos=pos/s->sector_size; newpos*=s->sector_size; // align
|
|
stream->pos=s->read_filepos=newpos;
|
|
s->eof=0; // !!!!!!!
|
|
cache_wakeup(stream);
|
|
|
|
cache_stream_fill_buffer(stream);
|
|
|
|
pos-=newpos;
|
|
if(pos>=0 && pos<=stream->buf_len){
|
|
stream->buf_pos=pos; // byte position in sector
|
|
return 1;
|
|
}
|
|
|
|
// stream->buf_pos=stream->buf_len=0;
|
|
// return 1;
|
|
|
|
mp_msg(MSGT_CACHE,MSGL_V,"cache_stream_seek: WARNING! Can't seek to 0x%"PRIX64" !\n",(int64_t)(pos+newpos));
|
|
return 0;
|
|
}
|
|
|
|
int cache_do_control(stream_t *stream, int cmd, void *arg) {
|
|
int sleep_count = 0;
|
|
cache_vars_t* s = stream->cache_data;
|
|
switch (cmd) {
|
|
case STREAM_CTRL_SEEK_TO_TIME:
|
|
s->control_double_arg = *(double *)arg;
|
|
s->control = cmd;
|
|
break;
|
|
case STREAM_CTRL_SEEK_TO_CHAPTER:
|
|
case STREAM_CTRL_SET_ANGLE:
|
|
s->control_uint_arg = *(unsigned *)arg;
|
|
s->control = cmd;
|
|
break;
|
|
// the core might call these every frame, so cache them...
|
|
case STREAM_CTRL_GET_TIME_LENGTH:
|
|
*(double *)arg = s->stream_time_length;
|
|
return s->stream_time_length ? STREAM_OK : STREAM_UNSUPPORTED;
|
|
case STREAM_CTRL_GET_CURRENT_TIME:
|
|
*(double *)arg = s->stream_time_pos;
|
|
return s->stream_time_pos != MP_NOPTS_VALUE ? STREAM_OK : STREAM_UNSUPPORTED;
|
|
case STREAM_CTRL_GET_NUM_CHAPTERS:
|
|
case STREAM_CTRL_GET_CURRENT_CHAPTER:
|
|
case STREAM_CTRL_GET_ASPECT_RATIO:
|
|
case STREAM_CTRL_GET_NUM_ANGLES:
|
|
case STREAM_CTRL_GET_ANGLE:
|
|
case -2:
|
|
s->control = cmd;
|
|
break;
|
|
default:
|
|
return STREAM_UNSUPPORTED;
|
|
}
|
|
cache_wakeup(stream);
|
|
while (s->control != -1) {
|
|
if (sleep_count++ == 1000)
|
|
mp_msg(MSGT_CACHE, MSGL_WARN, "Cache not responding!\n");
|
|
if (stream_check_interrupt(CONTROL_SLEEP_TIME)) {
|
|
s->eof = 1;
|
|
return STREAM_UNSUPPORTED;
|
|
}
|
|
}
|
|
switch (cmd) {
|
|
case STREAM_CTRL_GET_TIME_LENGTH:
|
|
case STREAM_CTRL_GET_CURRENT_TIME:
|
|
case STREAM_CTRL_GET_ASPECT_RATIO:
|
|
*(double *)arg = s->control_double_arg;
|
|
break;
|
|
case STREAM_CTRL_GET_NUM_CHAPTERS:
|
|
case STREAM_CTRL_GET_CURRENT_CHAPTER:
|
|
case STREAM_CTRL_GET_NUM_ANGLES:
|
|
case STREAM_CTRL_GET_ANGLE:
|
|
*(unsigned *)arg = s->control_uint_arg;
|
|
break;
|
|
case STREAM_CTRL_SEEK_TO_CHAPTER:
|
|
case STREAM_CTRL_SEEK_TO_TIME:
|
|
case STREAM_CTRL_SET_ANGLE:
|
|
if (s->control_res != STREAM_UNSUPPORTED)
|
|
stream->pos = s->read_filepos = s->control_new_pos;
|
|
break;
|
|
}
|
|
return s->control_res;
|
|
}
|