diff options
Diffstat (limited to 'libmpdemux/stream.c')
| -rw-r--r-- | libmpdemux/stream.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/libmpdemux/stream.c b/libmpdemux/stream.c new file mode 100644 index 0000000000..de138cef02 --- /dev/null +++ b/libmpdemux/stream.c @@ -0,0 +1,188 @@ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/ioctl.h> +#include <fcntl.h> + +#include "config.h" +#include "mp_msg.h" +#include "help_mp.h" + +#include "stream.h" + +extern int verbose; // defined in mplayer.c + +#ifdef __FreeBSD__ +#include "vcd_read_fbsd.h" +#else +#include "vcd_read.h" +#endif + +#ifdef USE_DVDREAD +int dvd_read_sector(void* d,void* p2); +void dvd_seek(void* d,off_t pos); +#endif + +//=================== STREAMER ========================= + +int stream_fill_buffer(stream_t *s){ + int len; + if(s->eof){ s->buf_pos=s->buf_len=0; return 0; } + switch(s->type){ + case STREAMTYPE_FILE: + case STREAMTYPE_STREAM: + len=read(s->fd,s->buffer,STREAM_BUFFER_SIZE);break; + case STREAMTYPE_VCD: +#ifdef VCD_CACHE + len=vcd_cache_read(s->fd,s->buffer);break; +#else + len=vcd_read(s->fd,s->buffer);break; +#endif +#ifdef USE_DVDREAD + case STREAMTYPE_DVD: { + off_t pos=dvd_read_sector(s->priv,s->buffer); + if(pos>=0){ + len=2048; // full sector + s->pos=2048*pos-len; + } else len=-1; // error + break; + } +#endif + default: len=0; + } + if(len<=0){ s->eof=1; s->buf_pos=s->buf_len=0; return 0; } + s->buf_pos=0; + s->buf_len=len; + s->pos+=len; +// printf("[%d]",len);fflush(stdout); + return len; +} + +int stream_seek_long(stream_t *s,off_t pos){ +off_t newpos; + +// if(verbose>=3) printf("seek_long to 0x%X\n",(unsigned int)pos); + + s->buf_pos=s->buf_len=0; + + switch(s->type){ + case STREAMTYPE_FILE: + case STREAMTYPE_STREAM: +#ifdef _LARGEFILE_SOURCE + newpos=pos&(~((long long)STREAM_BUFFER_SIZE-1));break; +#else + newpos=pos&(~(STREAM_BUFFER_SIZE-1));break; +#endif + case STREAMTYPE_VCD: + newpos=(pos/VCD_SECTOR_DATA)*VCD_SECTOR_DATA;break; + case STREAMTYPE_DVD: + newpos=pos/2048; newpos*=2048; break; + } + +if(verbose>=3){ +#ifdef _LARGEFILE_SOURCE + printf("s->pos=%llX newpos=%llX new_bufpos=%llX buflen=%X \n", + (long long)s->pos,(long long)newpos,(long long)pos,s->buf_len); +#else + printf("s->pos=%X newpos=%X new_bufpos=%X buflen=%X \n", + (unsigned int)s->pos,newpos,pos,s->buf_len); +#endif +} + + pos-=newpos; + +if(newpos==0 || newpos!=s->pos){ + switch(s->type){ + case STREAMTYPE_FILE: + s->pos=newpos; // real seek + if(lseek(s->fd,s->pos,SEEK_SET)<0) s->eof=1; + break; + case STREAMTYPE_VCD: + s->pos=newpos; // real seek +#ifdef VCD_CACHE + vcd_cache_seek(s->pos/VCD_SECTOR_DATA); +#else + vcd_set_msf(s->pos/VCD_SECTOR_DATA); +#endif + break; +#ifdef USE_DVDREAD + case STREAMTYPE_DVD: + s->pos=newpos; // real seek + dvd_seek(s->priv,s->pos/2048); + break; +#endif + case STREAMTYPE_STREAM: + //s->pos=newpos; // real seek + if(newpos<s->pos){ + mp_msg(MSGT_STREAM,MSGL_INFO,"Cannot seek backward in linear streams!\n"); + return 1; + } + while(s->pos<newpos){ + if(stream_fill_buffer(s)<=0) break; // EOF + } + break; + } +// putchar('.');fflush(stdout); +//} else { +// putchar('%');fflush(stdout); +} + + stream_fill_buffer(s); + if(pos>=0 && pos<=s->buf_len){ + s->buf_pos=pos; // byte position in sector + return 1; + } + +// if(pos==s->buf_len) printf("XXX Seek to last byte of file -> EOF\n"); + +#ifdef _LARGEFILE_SOURCE + mp_msg(MSGT_STREAM,MSGL_V,"stream_seek: WARNING! Can't seek to 0x%llX !\n",(long long)(pos+newpos)); +#else + mp_msg(MSGT_STREAM,MSGL_V,"stream_seek: WARNING! Can't seek to 0x%X !\n",(pos+newpos)); +#endif + return 0; +} + + +void stream_reset(stream_t *s){ + if(s->eof){ + s->pos=0; //ftell(f); +// s->buf_pos=s->buf_len=0; + s->eof=0; + } + //stream_seek(s,0); +} + +stream_t* new_memory_stream(unsigned char* data,int len){ + stream_t *s=malloc(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=malloc(sizeof(stream_t)); + s->fd=fd; + s->type=type; + s->buf_pos=s->buf_len=0; + s->start_pos=s->end_pos=0; + s->priv=NULL; + stream_reset(s); + return s; +} + +void free_stream(stream_t *s){ + if(s->priv) free(s->priv); + free(s); +} + + |