/*
- * PSX MDEC codec
+ * Sony PlayStation MDEC (Motion DECoder)
* Copyright (c) 2003 Michael Niedermayer
*
* based upon code from Sebastian Jedruszkiewicz <elf@frogger.rules.pl>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file mdec.c
- * PSX MDEC codec.
- * This is very similar to intra only MPEG1.
+ * @file
+ * Sony PlayStation MDEC (Motion DECoder)
+ * This is very similar to intra-only MPEG-1.
*/
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
+#include "mpeg12.h"
+#include "thread.h"
typedef struct MDECContext{
AVCodecContext *avctx;
int mb_width;
int mb_height;
int mb_x, mb_y;
- DECLARE_ALIGNED_16(DCTELEM, block[6][64]);
- DECLARE_ALIGNED_8(uint16_t, intra_matrix[64]);
- DECLARE_ALIGNED_8(int, q_intra_matrix[64]);
+ DECLARE_ALIGNED(16, DCTELEM, block)[6][64];
uint8_t *bitstream_buffer;
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;
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);
a->dsp.clear_blocks(block[0]);
for(i=0; i<6; i++){
- if( mdec_decode_block_intra(a, block[ block_index[i] ], block_index[i]) < 0)
+ if( mdec_decode_block_intra(a, block[ block_index[i] ], block_index[i]) < 0 ||
+ get_bits_left(&a->gb) < 0)
return -1;
}
return 0;
static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- const 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])
- avctx->release_buffer(avctx, p);
+ ff_thread_release_buffer(avctx, p);
p->reference= 0;
- if(avctx->get_buffer(avctx, p) < 0){
+ if(ff_thread_get_buffer(avctx, p) < 0){
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
- p->pict_type= FF_I_TYPE;
+ p->pict_type= AV_PICTURE_TYPE_I;
p->key_frame= 1;
- 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 ];
}
p->quality= a->qscale * FF_QP2LAMBDA;
- memset(p->qscale_table, a->qscale, p->qstride*a->mb_height);
+ memset(p->qscale_table, a->qscale, a->mb_width);
- *picture= *(AVFrame*)&a->picture;
+ *picture = a->picture;
*data_size = sizeof(AVPicture);
- emms_c();
-
return (get_bits_count(&a->gb)+31)/32*4;
}
static av_cold void mdec_common_init(AVCodecContext *avctx){
MDECContext * const a = avctx->priv_data;
- dsputil_init(&a->dsp, avctx);
+ ff_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 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);
- p->qstride= a->mb_width;
- p->qscale_table= av_mallocz( p->qstride * a->mb_height);
- avctx->pix_fmt= PIX_FMT_YUV420P;
+ if( avctx->idct_algo == FF_IDCT_AUTO )
+ avctx->idct_algo = FF_IDCT_SIMPLE;
+ p->qstride= 0;
+ p->qscale_table= av_mallocz(a->mb_width);
+ avctx->pix_fmt= PIX_FMT_YUVJ420P;
+
+ return 0;
+}
+
+static av_cold int decode_init_thread_copy(AVCodecContext *avctx){
+ MDECContext * const a = avctx->priv_data;
+ AVFrame *p = &a->picture;
+
+ avctx->coded_frame = p;
+ a->avctx= avctx;
+
+ p->qscale_table = av_mallocz( a->mb_width);
return 0;
}
static av_cold int decode_end(AVCodecContext *avctx){
MDECContext * const a = avctx->priv_data;
+ if(a->picture.data[0])
+ avctx->release_buffer(avctx, &a->picture);
av_freep(&a->bitstream_buffer);
av_freep(&a->picture.qscale_table);
a->bitstream_buffer_size=0;
return 0;
}
-AVCodec mdec_decoder = {
- "mdec",
- CODEC_TYPE_VIDEO,
- CODEC_ID_MDEC,
- sizeof(MDECContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
- .long_name= NULL_IF_CONFIG_SMALL("Sony PlayStation MDEC (Motion DECoder)"),
+AVCodec ff_mdec_decoder = {
+ .name = "mdec",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_MDEC,
+ .priv_data_size = sizeof(MDECContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
+ .long_name = NULL_IF_CONFIG_SMALL("Sony PlayStation MDEC (Motion DECoder)"),
+ .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy)
};
-
projects / ffmpeg / blobdiff