mirror of https://github.com/mpv-player/mpv
296 lines
7.4 KiB
C
296 lines
7.4 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "config.h"
|
|
#include "mp_msg.h"
|
|
|
|
#include "vd_internal.h"
|
|
|
|
static vd_info_t info =
|
|
{
|
|
"MPEG 1/2 Video decoder v2.0",
|
|
"libmpeg2",
|
|
"A'rpi",
|
|
"Aaron & Walken",
|
|
"native"
|
|
};
|
|
|
|
LIBVD_EXTERN(libmpeg2)
|
|
|
|
#define USE_SIGJMP_TRICK
|
|
|
|
#ifdef USE_SIGJMP_TRICK
|
|
#include <signal.h>
|
|
#include <setjmp.h>
|
|
#endif
|
|
|
|
//#include "libmpdemux/parse_es.h"
|
|
|
|
#include "libvo/video_out.h" // FIXME!!!
|
|
|
|
#include "libmpeg2/mpeg2.h"
|
|
#include "libmpeg2/mpeg2_internal.h"
|
|
#include "libmpeg2/mm_accel.h"
|
|
|
|
#include "../cpudetect.h"
|
|
|
|
mpeg2_config_t config; // FIXME!!!
|
|
static picture_t *picture=NULL; // exported from libmpeg2/decode.c
|
|
|
|
static int table_init_state=0;
|
|
|
|
// to set/get/query special features/parameters
|
|
static int control(sh_video_t *sh,int cmd,void* arg,...){
|
|
return CONTROL_UNKNOWN;
|
|
}
|
|
|
|
static vo_frame_t frames[3];
|
|
|
|
// init driver
|
|
static int init(sh_video_t *sh){
|
|
|
|
config.flags = 0;
|
|
if(gCpuCaps.hasMMX)
|
|
config.flags |= MM_ACCEL_X86_MMX;
|
|
if(gCpuCaps.hasMMX2)
|
|
config.flags |= MM_ACCEL_X86_MMXEXT;
|
|
if(gCpuCaps.has3DNow)
|
|
config.flags |= MM_ACCEL_X86_3DNOW;
|
|
#ifdef HAVE_MLIB
|
|
config.flags |= MM_ACCEL_MLIB;
|
|
#endif
|
|
|
|
picture=malloc(sizeof(picture_t)); // !!! NEW HACK :) !!!
|
|
memset(picture,0,sizeof(picture_t));
|
|
header_state_init (picture);
|
|
|
|
if(!table_init_state){
|
|
idct_init ();
|
|
motion_comp_init ();
|
|
table_init_state=1;
|
|
}
|
|
|
|
picture->pp_options=divx_quality;
|
|
|
|
memset(frames,0,3*sizeof(vo_frame_t));
|
|
|
|
picture->forward_reference_frame=&frames[0];
|
|
picture->backward_reference_frame=&frames[1];
|
|
picture->temp_frame=&frames[2];
|
|
picture->current_frame=NULL;
|
|
|
|
// send seq header to the decoder: *** HACK ***
|
|
// mpeg2_decode_data(NULL,videobuffer,videobuffer+videobuf_len,0);
|
|
// mpeg2_allocate_image_buffers (picture);
|
|
return mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_YV12);
|
|
}
|
|
|
|
// uninit driver
|
|
static void uninit(sh_video_t *sh){
|
|
// mpeg2_free_image_buffers (picture);
|
|
}
|
|
|
|
static void draw_slice (vo_frame_t * frame, uint8_t ** src){
|
|
vo_functions_t * output = frame->vo;
|
|
int stride[3];
|
|
int y=picture->slice<<4;
|
|
|
|
stride[0]=picture->coded_picture_width;
|
|
stride[1]=stride[2]=stride[0]/2;
|
|
|
|
output->draw_slice (src,
|
|
stride, picture->display_picture_width,
|
|
(y+16<=picture->display_picture_height) ? 16 :
|
|
picture->display_picture_height-y,
|
|
0, y);
|
|
|
|
++picture->slice;
|
|
}
|
|
|
|
static int in_slice_flag=0; // FIXME! move to picture struct
|
|
static int drop_frame=0; // FIXME! move to picture struct
|
|
|
|
static mp_image_t* parse_chunk (sh_video_t* sh, int code, uint8_t * buffer, int framedrop){
|
|
mp_image_t* mpi=NULL;
|
|
|
|
// stats_header (code, buffer);
|
|
|
|
if (in_slice_flag && ((!code) || (code >= 0xb0))) {
|
|
// ok, we've completed decoding a frame/field!
|
|
in_slice_flag = 0;
|
|
mpi=picture->display_frame->mpi;
|
|
if(picture->picture_structure!=FRAME_PICTURE && !picture->second_field)
|
|
mpi=NULL; // we don't draw first fields!
|
|
}
|
|
|
|
switch (code) {
|
|
case 0x00: /* picture_start_code */
|
|
if (header_process_picture_header (picture, buffer)) {
|
|
printf ("bad picture header\n");
|
|
}
|
|
drop_frame = framedrop && (picture->picture_coding_type == B_TYPE);
|
|
drop_frame |= framedrop>=2; // hard drop
|
|
break;
|
|
|
|
case 0xb3: /* sequence_header_code */
|
|
if (header_process_sequence_header (picture, buffer)) {
|
|
printf ("bad sequence header\n");
|
|
}
|
|
break;
|
|
|
|
case 0xb5: /* extension_start_code */
|
|
if (header_process_extension (picture, buffer)) {
|
|
printf ("bad extension\n");
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (code >= 0xb0) break;
|
|
|
|
if (!in_slice_flag) {
|
|
in_slice_flag = 1;
|
|
|
|
// set current_frame pointer:
|
|
if (!picture->second_field){
|
|
mp_image_t* mpi;
|
|
int flags;
|
|
if (picture->picture_coding_type == B_TYPE){
|
|
flags=(!framedrop && vd_use_slices &&
|
|
picture->picture_structure==FRAME_PICTURE) ?
|
|
MP_IMGFLAG_DRAW_CALLBACK:0;
|
|
picture->display_frame=
|
|
picture->current_frame = picture->temp_frame;
|
|
} else {
|
|
flags=MP_IMGFLAG_PRESERVE|MP_IMGFLAG_READABLE;
|
|
picture->current_frame = picture->forward_reference_frame;
|
|
picture->display_frame=
|
|
picture->forward_reference_frame = picture->backward_reference_frame;
|
|
picture->backward_reference_frame = picture->current_frame;
|
|
}
|
|
mpi=mpcodecs_get_image(sh,MP_IMGTYPE_IPB, flags,
|
|
picture->coded_picture_width,
|
|
picture->coded_picture_height);
|
|
// ok, lets see what did we get:
|
|
if(mpi->flags&MP_IMGFLAG_DRAW_CALLBACK &&
|
|
!(mpi->flags&MP_IMGFLAG_DIRECT)){
|
|
// nice, filter/vo likes draw_callback :)
|
|
picture->current_frame->copy=draw_slice;
|
|
} else
|
|
picture->current_frame->copy=NULL;
|
|
// let's, setup pointers!
|
|
picture->current_frame->base[0]=mpi->planes[0];
|
|
picture->current_frame->base[1]=mpi->planes[1];
|
|
picture->current_frame->base[2]=mpi->planes[2];
|
|
picture->current_frame->mpi=mpi; // tricky!
|
|
#if 1
|
|
if(!picture->forward_reference_frame->base[0]){
|
|
// workaround for sig11
|
|
picture->forward_reference_frame->base[0]=mpi->planes[0];
|
|
picture->forward_reference_frame->base[1]=mpi->planes[1];
|
|
picture->forward_reference_frame->base[2]=mpi->planes[2];
|
|
}
|
|
if(!picture->backward_reference_frame->base[0]){
|
|
// workaround for sig11
|
|
picture->backward_reference_frame->base[0]=mpi->planes[0];
|
|
picture->backward_reference_frame->base[1]=mpi->planes[1];
|
|
picture->backward_reference_frame->base[2]=mpi->planes[2];
|
|
}
|
|
#endif
|
|
#ifdef MPEG12_POSTPROC
|
|
mpi->qscale=&picture->current_frame->quant_store[1][1];
|
|
mpi->qstride=(MPEG2_MBC+1);
|
|
#endif
|
|
mp_msg(MSGT_DECVIDEO,MSGL_DBG2,"mpeg2: [%c] %p %s \n",
|
|
(picture->picture_coding_type == B_TYPE) ? 'B':'P',
|
|
mpi, (mpi->flags&MP_IMGFLAG_DIRECT)?"DR!":"");
|
|
}
|
|
|
|
picture->current_frame->vo=sh->video_out;
|
|
picture->slice=0;
|
|
|
|
}
|
|
|
|
if (!drop_frame) {
|
|
slice_process (picture, code, buffer);
|
|
#ifdef ARCH_X86
|
|
if (config.flags & MM_ACCEL_X86_MMX) __asm__ __volatile__ ("emms");
|
|
#endif
|
|
}
|
|
|
|
}
|
|
return mpi;
|
|
}
|
|
|
|
#ifdef USE_SIGJMP_TRICK
|
|
|
|
static jmp_buf mpeg2_jmp_buf;
|
|
|
|
static void mpeg2_sighandler(int sig){
|
|
longjmp(mpeg2_jmp_buf,1);
|
|
}
|
|
#endif
|
|
|
|
// decode a frame
|
|
static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags){
|
|
static uint32_t code;
|
|
static uint8_t* pos;
|
|
static uint8_t* current;
|
|
uint8_t* end=data+len;
|
|
static mp_image_t* mpi;
|
|
mp_image_t* ret=NULL;
|
|
int framedrop=flags&3;
|
|
void* old_sigh;
|
|
|
|
// Note: static is REQUIRED because of longjmp() may destroy stack!
|
|
pos=NULL;
|
|
current=data;
|
|
mpi=NULL;
|
|
|
|
#ifdef USE_SIGJMP_TRICK
|
|
old_sigh=signal(SIGSEGV,mpeg2_sighandler);
|
|
#endif
|
|
|
|
while(current<end){
|
|
// FIND NEXT HEAD:
|
|
static unsigned int head;
|
|
static uint8_t c;
|
|
head=-1;
|
|
//--------------------
|
|
while(current<end){
|
|
c=current[0];
|
|
++current;
|
|
head<<=8;
|
|
if(head==0x100) break; // synced
|
|
head|=c;
|
|
}
|
|
//--------------------
|
|
if(pos){
|
|
#ifdef USE_SIGJMP_TRICK
|
|
if(setjmp(mpeg2_jmp_buf)){
|
|
#ifdef ARCH_X86
|
|
if (config.flags & MM_ACCEL_X86_MMX) __asm__ __volatile__ ("emms");
|
|
#endif
|
|
printf("@@@ libmpeg2 returned from sig11... (bad file?) @@@\n");
|
|
} else
|
|
#endif
|
|
{
|
|
ret=parse_chunk(sh, code&0xFF, pos, framedrop);
|
|
if(ret) mpi=ret;
|
|
}
|
|
}
|
|
//--------------------
|
|
pos=current;code=head|c;
|
|
}
|
|
|
|
#ifdef USE_SIGJMP_TRICK
|
|
signal(SIGSEGV,old_sigh); // restore sighandler
|
|
#endif
|
|
|
|
// if(code==0x1FF){
|
|
ret=parse_chunk(sh, 0xFF, NULL, framedrop); // send 'end of frame'
|
|
if(ret) mpi=ret;
|
|
// }
|
|
|
|
return mpi;
|
|
}
|