/*
- * PSX MDEC codec
+ * Sony PlayStation MDEC (Motion DECoder)
* Copyright (c) 2003 Michael Niedermayer
*
- * This library is free software; you can redistribute it and/or
+ * based upon code from Sebastian Jedruszkiewicz <elf@frogger.rules.pl>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * based upon code from Sebastian Jedruszkiewicz <elf@frogger.rules.pl>
*/
/**
- * @file mdec.c
- * PSX MDEC codec.
- * This is very similar to intra only MPEG1.
+ * @file libavcodec/mdec.c
+ * Sony PlayStation MDEC (Motion DECoder)
+ * This is very similar to intra-only MPEG-1.
*/
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
-
-//#undef NDEBUG
-//#include <assert.h>
+#include "mpeg12.h"
typedef struct MDECContext{
AVCodecContext *avctx;
DSPContext dsp;
AVFrame picture;
- PutBitContext pb;
GetBitContext gb;
ScanTable scantable;
int version;
int mb_width;
int mb_height;
int mb_x, mb_y;
- DCTELEM __align8 block[6][64];
- uint16_t __align8 intra_matrix[64];
- int __align8 q_intra_matrix[64];
+ DECLARE_ALIGNED_16(DCTELEM, block[6][64]);
+ DECLARE_ALIGNED_8(uint16_t, intra_matrix[64]);
+ DECLARE_ALIGNED_8(int, q_intra_matrix[64]);
uint8_t *bitstream_buffer;
- int bitstream_buffer_size;
+ unsigned int bitstream_buffer_size;
int block_last_index[6];
} MDECContext;
-//very similar to mpeg1
+//very similar to MPEG-1
static inline int mdec_decode_block_intra(MDECContext *a, DCTELEM *block, int n)
{
int level, diff, i, j, run;
int component;
- RLTable *rl = &rl_mpeg1;
+ RLTable *rl = &ff_rl_mpeg1;
uint8_t * const scantable= a->scantable.permutated;
const uint16_t *quant_matrix= ff_mpeg1_default_intra_matrix;
const int qscale= a->qscale;
- /* DC coef */
+ /* DC coefficient */
if(a->version==2){
block[0]= 2*get_sbits(&a->gb, 10) + 1024;
}else{
i = 0;
{
OPEN_READER(re, &a->gb);
- /* now quantify & encode AC coefs */
+ /* now quantify & encode AC coefficients */
for(;;) {
UPDATE_CACHE(re, &a->gb);
GET_RL_VLC(level, run, re, &a->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
i += run;
j = scantable[i];
level= (level*qscale*quant_matrix[j])>>3;
-// level= (level-1)|1;
level = (level ^ SHOW_SBITS(re, &a->gb, 1)) - SHOW_SBITS(re, &a->gb, 1);
LAST_SKIP_BITS(re, &a->gb, 1);
} else {
static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
MDECContext * const a = avctx->priv_data;
AVFrame *picture = data;
- AVFrame * const p= (AVFrame*)&a->picture;
+ AVFrame * const p= &a->picture;
int i;
if(p->data[0])
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
- p->pict_type= I_TYPE;
+ p->pict_type= FF_I_TYPE;
p->key_frame= 1;
- a->last_dc[0]=
- a->last_dc[1]=
- a->last_dc[2]= 0;
- a->bitstream_buffer= av_fast_realloc(a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
+ av_fast_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!a->bitstream_buffer)
+ return AVERROR(ENOMEM);
for(i=0; i<buf_size; i+=2){
a->bitstream_buffer[i] = buf[i+1];
a->bitstream_buffer[i+1]= buf[i ];
a->qscale= get_bits(&a->gb, 16);
a->version= get_bits(&a->gb, 16);
-// printf("qscale:%d (0x%X), version:%d (0x%X)\n", a->qscale, a->qscale, a->version, a->version);
+ a->last_dc[0]=
+ a->last_dc[1]=
+ a->last_dc[2]= 128;
for(a->mb_x=0; a->mb_x<a->mb_width; a->mb_x++){
for(a->mb_y=0; a->mb_y<a->mb_height; a->mb_y++){
}
}
-// p->quality= (32 + a->inv_qscale/2)/a->inv_qscale;
-// memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
+ p->quality= a->qscale * FF_QP2LAMBDA;
+ memset(p->qscale_table, a->qscale, p->qstride*a->mb_height);
- *picture= *(AVFrame*)&a->picture;
+ *picture = a->picture;
*data_size = sizeof(AVPicture);
- emms_c();
-
return (get_bits_count(&a->gb)+31)/32*4;
}
-static void mdec_common_init(AVCodecContext *avctx){
+static av_cold void mdec_common_init(AVCodecContext *avctx){
MDECContext * const a = avctx->priv_data;
dsputil_init(&a->dsp, avctx);
a->mb_width = (avctx->coded_width + 15) / 16;
a->mb_height = (avctx->coded_height + 15) / 16;
- avctx->coded_frame= (AVFrame*)&a->picture;
+ avctx->coded_frame= &a->picture;
a->avctx= avctx;
}
-static int decode_init(AVCodecContext *avctx){
+static av_cold int decode_init(AVCodecContext *avctx){
MDECContext * const a = avctx->priv_data;
- AVFrame *p= (AVFrame*)&a->picture;
+ AVFrame *p= &a->picture;
mdec_common_init(avctx);
- init_vlcs();
+ ff_mpeg12_init_vlcs();
ff_init_scantable(a->dsp.idct_permutation, &a->scantable, ff_zigzag_direct);
-/*
- for(i=0; i<64; i++){
- int index= ff_zigzag_direct[i];
- a->intra_matrix[i]= 64*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
- }
-*/
+
p->qstride= a->mb_width;
p->qscale_table= av_mallocz( p->qstride * a->mb_height);
avctx->pix_fmt= PIX_FMT_YUV420P;
return 0;
}
-static int decode_end(AVCodecContext *avctx){
+static av_cold int decode_end(AVCodecContext *avctx){
MDECContext * const a = avctx->priv_data;
av_freep(&a->bitstream_buffer);
decode_end,
decode_frame,
CODEC_CAP_DR1,
+ .long_name= NULL_IF_CONFIG_SMALL("Sony PlayStation MDEC (Motion DECoder)"),
};
projects / frescor / ffmpeg.git / blobdiff