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mpv/libmpcodecs/vd_libmpeg2.c

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#include <stdio.h>
#include <stdlib.h>
#include "config.h"
#include "mp_msg.h"
#include "vd_internal.h"
//#undef MPEG12_POSTPROC
static vd_info_t info =
{
"MPEG 1/2 Video decoder libmpeg2-v0.4.0b",
"libmpeg2",
"A'rpi & Fabian Franz",
"Aaron & Walken",
"native"
};
LIBVD_EXTERN(libmpeg2)
//#include "libvo/video_out.h" // FIXME!!!
#include "libmpeg2/mpeg2.h"
#include "libmpeg2/attributes.h"
#include "libmpeg2/mpeg2_internal.h"
#include "cpudetect.h"
typedef struct {
mpeg2dec_t *mpeg2dec;
int quant_store_idx;
char *quant_store[3];
} vd_libmpeg2_ctx_t;
// to set/get/query special features/parameters
static int control(sh_video_t *sh,int cmd,void* arg,...){
vd_libmpeg2_ctx_t *context = sh->context;
mpeg2dec_t * mpeg2dec = context->mpeg2dec;
const mpeg2_info_t * info = mpeg2_info (mpeg2dec);
switch(cmd) {
case VDCTRL_QUERY_FORMAT:
if (info->sequence->width >> 1 == info->sequence->chroma_width &&
info->sequence->height >> 1 == info->sequence->chroma_height &&
(*((int*)arg)) == IMGFMT_YV12)
return CONTROL_TRUE;
if (info->sequence->width >> 1 == info->sequence->chroma_width &&
info->sequence->height == info->sequence->chroma_height &&
(*((int*)arg)) == IMGFMT_422P)
return CONTROL_TRUE;
return CONTROL_FALSE;
}
return CONTROL_UNKNOWN;
}
// init driver
static int init(sh_video_t *sh){
vd_libmpeg2_ctx_t *context;
mpeg2dec_t * mpeg2dec;
// const mpeg2_info_t * info;
int accel;
accel = 0;
if(gCpuCaps.hasMMX)
accel |= MPEG2_ACCEL_X86_MMX;
if(gCpuCaps.hasMMX2)
accel |= MPEG2_ACCEL_X86_MMXEXT;
if(gCpuCaps.has3DNow)
accel |= MPEG2_ACCEL_X86_3DNOW;
if(gCpuCaps.hasAltiVec)
accel |= MPEG2_ACCEL_PPC_ALTIVEC;
#ifdef HAVE_VIS
accel |= MPEG2_ACCEL_SPARC_VIS;
#endif
mpeg2_accel(accel);
mpeg2dec = mpeg2_init ();
if(!mpeg2dec) return 0;
mpeg2_custom_fbuf(mpeg2dec,1); // enable DR1
context = calloc(1, sizeof(vd_libmpeg2_ctx_t));
context->mpeg2dec = mpeg2dec;
sh->context = context;
mpeg2dec->pending_buffer = 0;
mpeg2dec->pending_length = 0;
return 1;
}
// uninit driver
static void uninit(sh_video_t *sh){
int i;
vd_libmpeg2_ctx_t *context = sh->context;
mpeg2dec_t * mpeg2dec = context->mpeg2dec;
if (mpeg2dec->pending_buffer) free(mpeg2dec->pending_buffer);
mpeg2dec->decoder.convert=NULL;
mpeg2dec->decoder.convert_id=NULL;
mpeg2_close (mpeg2dec);
for (i=0; i < 3; i++)
free(context->quant_store[i]);
free(sh->context);
}
static void draw_slice (void * _sh, uint8_t * const * src, unsigned int y){
sh_video_t* sh = (sh_video_t*) _sh;
vd_libmpeg2_ctx_t *context = sh->context;
mpeg2dec_t* mpeg2dec = context->mpeg2dec;
const mpeg2_info_t * info = mpeg2_info (mpeg2dec);
int stride[3];
// printf("draw_slice() y=%d \n",y);
stride[0]=mpeg2dec->decoder.stride;
stride[1]=stride[2]=mpeg2dec->decoder.uv_stride;
mpcodecs_draw_slice(sh, (uint8_t **)src,
stride, info->sequence->picture_width,
(y+16<=info->sequence->picture_height) ? 16 :
info->sequence->picture_height-y,
0, y);
}
// decode a frame
static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags){
vd_libmpeg2_ctx_t *context = sh->context;
mpeg2dec_t * mpeg2dec = context->mpeg2dec;
const mpeg2_info_t * info = mpeg2_info (mpeg2dec);
int drop_frame, framedrop=flags&3;
// MPlayer registers its own draw_slice callback, prevent libmpeg2 from freeing the context
mpeg2dec->decoder.convert=NULL;
mpeg2dec->decoder.convert_id=NULL;
if(len<=0) return NULL; // skipped null frame
// append extra 'end of frame' code:
((char*)data+len)[0]=0;
((char*)data+len)[1]=0;
((char*)data+len)[2]=1;
((char*)data+len)[3]=0xff;
len+=4;
if (mpeg2dec->pending_length) {
mpeg2_buffer (mpeg2dec, mpeg2dec->pending_buffer, mpeg2dec->pending_buffer + mpeg2dec->pending_length);
} else {
mpeg2_buffer (mpeg2dec, data, (uint8_t *)data+len);
}
while(1){
int state=mpeg2_parse (mpeg2dec);
int type, use_callback;
mp_image_t* mpi_new;
unsigned long pw, ph;
switch(state){
case STATE_BUFFER:
if (mpeg2dec->pending_length) {
// just finished the pending data, continue with processing of the passed buffer
mpeg2dec->pending_length = 0;
mpeg2_buffer (mpeg2dec, data, (uint8_t *)data+len);
} else {
// parsing of the passed buffer finished, return.
return 0;
}
break;
case STATE_SEQUENCE:
pw = info->sequence->display_width * info->sequence->pixel_width;
ph = info->sequence->display_height * info->sequence->pixel_height;
if(ph) sh->aspect = (float) pw / (float) ph;
// video parameters inited/changed, (re)init libvo:
if (info->sequence->width >> 1 == info->sequence->chroma_width &&
info->sequence->height >> 1 == info->sequence->chroma_height) {
if(!mpcodecs_config_vo(sh,
info->sequence->picture_width,
info->sequence->picture_height, IMGFMT_YV12)) return 0;
} else if (info->sequence->width >> 1 == info->sequence->chroma_width &&
info->sequence->height == info->sequence->chroma_height) {
if(!mpcodecs_config_vo(sh,
info->sequence->picture_width,
info->sequence->picture_height, IMGFMT_422P)) return 0;
} else return 0;
break;
case STATE_PICTURE:
type=info->current_picture->flags&PIC_MASK_CODING_TYPE;
drop_frame = framedrop && (mpeg2dec->decoder.coding_type == B_TYPE);
drop_frame |= framedrop>=2; // hard drop
if (drop_frame) {
mpeg2_skip(mpeg2dec, 1);
//printf("Dropping Frame ...\n");
break;
}
mpeg2_skip(mpeg2dec, 0); //mpeg2skip skips frames until set again to 0
use_callback = (!framedrop && vd_use_slices &&
(info->current_picture->flags&PIC_FLAG_PROGRESSIVE_FRAME)) ?
MP_IMGFLAG_DRAW_CALLBACK:0;
// get_buffer "callback":
mpi_new=mpcodecs_get_image(sh,MP_IMGTYPE_IPB,
(type==PIC_FLAG_CODING_TYPE_B) ?
use_callback : (MP_IMGFLAG_PRESERVE|MP_IMGFLAG_READABLE),
info->sequence->width,
info->sequence->height);
if(!mpi_new) return 0; // VO ERROR!!!!!!!!
mpeg2_set_buf(mpeg2dec, mpi_new->planes, mpi_new);
mpi_new->stride[0] = info->sequence->width;
mpi_new->stride[1] = info->sequence->chroma_width;
mpi_new->stride[2] = info->sequence->chroma_width;
if (info->current_picture->flags&PIC_FLAG_TOP_FIELD_FIRST)
mpi_new->fields |= MP_IMGFIELD_TOP_FIRST;
else mpi_new->fields &= ~MP_IMGFIELD_TOP_FIRST;
if (info->current_picture->flags&PIC_FLAG_REPEAT_FIRST_FIELD)
mpi_new->fields |= MP_IMGFIELD_REPEAT_FIRST;
else mpi_new->fields &= ~MP_IMGFIELD_REPEAT_FIRST;
mpi_new->fields |= MP_IMGFIELD_ORDERED;
if (!(info->current_picture->flags&PIC_FLAG_PROGRESSIVE_FRAME))
mpi_new->fields |= MP_IMGFIELD_INTERLACED;
#ifdef MPEG12_POSTPROC
mpi_new->qstride=info->sequence->width>>4;
{
char **p = &context->quant_store[type==PIC_FLAG_CODING_TYPE_B ?
2 : (context->quant_store_idx ^= 1)];
*p = realloc(*p, mpi_new->qstride*(info->sequence->height>>4));
mpi_new->qscale = *p;
}
mpeg2dec->decoder.quant_store=mpi_new->qscale;
mpeg2dec->decoder.quant_stride=mpi_new->qstride;
mpi_new->pict_type=type; // 1->I, 2->P, 3->B
mpi_new->qscale_type= 1;
#endif
if (mpi_new->flags&MP_IMGFLAG_DRAW_CALLBACK
&& !(mpi_new->flags&MP_IMGFLAG_DIRECT)) {
// nice, filter/vo likes draw_callback :)
mpeg2dec->decoder.convert=draw_slice;
mpeg2dec->decoder.convert_id=sh;
} else {
mpeg2dec->decoder.convert=NULL;
mpeg2dec->decoder.convert_id=NULL;
}
break;
case STATE_SLICE:
case STATE_END:
case STATE_INVALID_END:
// decoding done:
if(info->display_fbuf) {
mp_image_t* mpi = info->display_fbuf->id;
if (mpeg2dec->pending_length == 0) {
mpeg2dec->pending_length = mpeg2dec->buf_end - mpeg2dec->buf_start;
mpeg2dec->pending_buffer = realloc(mpeg2dec->pending_buffer, mpeg2dec->pending_length);
memcpy(mpeg2dec->pending_buffer, mpeg2dec->buf_start, mpeg2dec->pending_length);
} else {
// still some data in the pending buffer, shouldn't happen
mpeg2dec->pending_length = mpeg2dec->buf_end - mpeg2dec->buf_start;
memmove(mpeg2dec->pending_buffer, mpeg2dec->buf_start, mpeg2dec->pending_length);
mpeg2dec->pending_buffer = realloc(mpeg2dec->pending_buffer, mpeg2dec->pending_length + len);
memcpy(mpeg2dec->pending_buffer+mpeg2dec->pending_length, data, len);
mpeg2dec->pending_length += len;
}
// fprintf(stderr, "pending = %d\n", mpeg2dec->pending_length);
return mpi;
}
}
}
}
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