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FFmpeg
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mdec: cosmetics, reformat

tags/n1.2
Anton Khirnov 13 years ago
parent
098eed95bc
commit
f713411d4c
1 changed files with 83 additions and 80 deletions
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  1. +83
    -80
      libavcodec/mdec.c

+ 83
- 80
libavcodec/mdec.c View File

@@ -33,7 +33,7 @@
#include "mpeg12.h"
#include "thread.h"

typedef struct MDECContext{
typedef struct MDECContext {
AVCodecContext *avctx;
DSPContext dsp;
AVFrame picture;
@@ -57,36 +57,36 @@ static inline int mdec_decode_block_intra(MDECContext *a, int16_t *block, int n)
int level, diff, i, j, run;
int component;
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;
uint8_t * const scantable = a->scantable.permutated;
const uint16_t *quant_matrix = ff_mpeg1_default_intra_matrix;
const int qscale = a->qscale;

/* DC coefficient */
if(a->version==2){
block[0]= 2*get_sbits(&a->gb, 10) + 1024;
}else{
if (a->version == 2) {
block[0] = 2 * get_sbits(&a->gb, 10) + 1024;
} else {
component = (n <= 3 ? 0 : n - 4 + 1);
diff = decode_dc(&a->gb, component);
if (diff >= 0xffff)
return -1;
a->last_dc[component]+= diff;
block[0] = a->last_dc[component]<<3;
a->last_dc[component] += diff;
block[0] = a->last_dc[component] << 3;
}

i = 0;
{
OPEN_READER(re, &a->gb);
/* now quantify & encode AC coefficients */
for(;;) {
for (;;) {
UPDATE_CACHE(re, &a->gb);
GET_RL_VLC(level, run, re, &a->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);

if(level == 127){
if (level == 127) {
break;
} else if(level != 0) {
i += run;
j = scantable[i];
level= (level*qscale*quant_matrix[j])>>3;
} else if (level != 0) {
i += run;
j = scantable[i];
level = (level * qscale * quant_matrix[j]) >> 3;
level = (level ^ SHOW_SBITS(re, &a->gb, 1)) - SHOW_SBITS(re, &a->gb, 1);
LAST_SKIP_BITS(re, &a->gb, 1);
} else {
@@ -94,19 +94,19 @@ static inline int mdec_decode_block_intra(MDECContext *a, int16_t *block, int n)
run = SHOW_UBITS(re, &a->gb, 6)+1; LAST_SKIP_BITS(re, &a->gb, 6);
UPDATE_CACHE(re, &a->gb);
level = SHOW_SBITS(re, &a->gb, 10); SKIP_BITS(re, &a->gb, 10);
i += run;
j = scantable[i];
if(level<0){
level= -level;
level= (level*qscale*quant_matrix[j])>>3;
level= (level-1)|1;
level= -level;
}else{
level= (level*qscale*quant_matrix[j])>>3;
level= (level-1)|1;
i += run;
j = scantable[i];
if (level < 0) {
level = -level;
level = (level * qscale * quant_matrix[j]) >> 3;
level = (level - 1) | 1;
level = -level;
} else {
level = (level * qscale * quant_matrix[j]) >> 3;
level = (level - 1) | 1;
}
}
if (i > 63){
if (i > 63) {
av_log(a->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", a->mb_x, a->mb_y);
return -1;
}
@@ -119,34 +119,36 @@ static inline int mdec_decode_block_intra(MDECContext *a, int16_t *block, int n)
return 0;
}

static inline int decode_mb(MDECContext *a, int16_t block[6][64]){
static inline int decode_mb(MDECContext *a, int16_t block[6][64])
{
int i;
const int block_index[6]= {5,4,0,1,2,3};
const int block_index[6] = { 5, 4, 0, 1, 2, 3 };

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 ||
for (i = 0; i < 6; i++) {
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 inline void idct_put(MDECContext *a, int mb_x, int mb_y){
int16_t (*block)[64]= a->block;
int linesize= a->picture.linesize[0];
static inline void idct_put(MDECContext *a, int mb_x, int mb_y)
{
int16_t (*block)[64] = a->block;
int linesize = a->picture.linesize[0];

uint8_t *dest_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
uint8_t *dest_y = a->picture.data[0] + (mb_y * 16 * linesize ) + mb_x * 16;
uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;

a->dsp.idct_put(dest_y , linesize, block[0]);
a->dsp.idct_put(dest_y + 8, linesize, block[1]);
a->dsp.idct_put(dest_y + 8*linesize , linesize, block[2]);
a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
a->dsp.idct_put(dest_y, linesize, block[0]);
a->dsp.idct_put(dest_y + 8, linesize, block[1]);
a->dsp.idct_put(dest_y + 8 * linesize, linesize, block[2]);
a->dsp.idct_put(dest_y + 8 * linesize + 8, linesize, block[3]);

if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
if (!(a->avctx->flags & CODEC_FLAG_GRAY)) {
a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
}
@@ -156,104 +158,105 @@ static int decode_frame(AVCodecContext *avctx,
void *data, int *got_frame,
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= &a->picture;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
AVFrame *picture = data;
AVFrame * const p = &a->picture;
int i;

if(p->data[0])
if (p->data[0])
ff_thread_release_buffer(avctx, p);

p->reference= 0;
if(ff_thread_get_buffer(avctx, p) < 0){
p->reference = 0;
if (ff_thread_get_buffer(avctx, p) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
p->pict_type= AV_PICTURE_TYPE_I;
p->key_frame= 1;
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;

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 ];
for (i = 0; i < buf_size; i += 2) {
a->bitstream_buffer[i] = buf[i + 1];
a->bitstream_buffer[i + 1] = buf[i];
}
init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
init_get_bits(&a->gb, a->bitstream_buffer, buf_size * 8);

/* skip over 4 preamble bytes in stream (typically 0xXX 0xXX 0x00 0x38) */
skip_bits(&a->gb, 32);

a->qscale= get_bits(&a->gb, 16);
a->version= get_bits(&a->gb, 16);
a->qscale = get_bits(&a->gb, 16);
a->version = get_bits(&a->gb, 16);

a->last_dc[0]=
a->last_dc[1]=
a->last_dc[2]= 128;
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++){
if( decode_mb(a, a->block) <0)
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++) {
if (decode_mb(a, a->block) < 0)
return -1;

idct_put(a, a->mb_x, a->mb_y);
}
}

p->quality= a->qscale * FF_QP2LAMBDA;
p->quality = a->qscale * FF_QP2LAMBDA;
memset(p->qscale_table, a->qscale, a->mb_width);

*picture = a->picture;
*got_frame = 1;

return (get_bits_count(&a->gb)+31)/32*4;
return (get_bits_count(&a->gb) + 31) / 32 * 4;
}

static av_cold int decode_init(AVCodecContext *avctx){
static av_cold int decode_init(AVCodecContext *avctx)
{
MDECContext * const a = avctx->priv_data;
AVFrame *p= &a->picture;
AVFrame *p = &a->picture;

a->mb_width = (avctx->coded_width + 15) / 16;
a->mb_height = (avctx->coded_height + 15) / 16;
a->mb_width = (avctx->coded_width + 15) / 16;
a->mb_height = (avctx->coded_height + 15) / 16;

avctx->coded_frame= &a->picture;
a->avctx= avctx;
avctx->coded_frame = &a->picture;
a->avctx = avctx;

ff_dsputil_init(&a->dsp, avctx);
ff_mpeg12_init_vlcs();
ff_init_scantable(a->dsp.idct_permutation, &a->scantable, ff_zigzag_direct);

if( avctx->idct_algo == FF_IDCT_AUTO )
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= AV_PIX_FMT_YUVJ420P;
p->qstride = 0;
p->qscale_table = av_mallocz(a->mb_width);
avctx->pix_fmt = AV_PIX_FMT_YUVJ420P;

return 0;
}

static av_cold int decode_init_thread_copy(AVCodecContext *avctx){
static av_cold int decode_init_thread_copy(AVCodecContext *avctx)
{
MDECContext * const a = avctx->priv_data;
AVFrame *p = &a->picture;
AVFrame *p = &a->picture;

avctx->coded_frame = p;
a->avctx= avctx;
a->avctx = avctx;

p->qscale_table = av_mallocz( a->mb_width);

return 0;
}

static av_cold int decode_end(AVCodecContext *avctx){
static av_cold int decode_end(AVCodecContext *avctx)
{
MDECContext * const a = avctx->priv_data;

if(a->picture.data[0])
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;
a->bitstream_buffer_size = 0;

return 0;
}


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