[libav-commits] mdec: cosmetics, reformat

Anton Khirnov git at libav.org
Tue Jan 29 07:37:13 CET 2013


Module: libav
Branch: master
Commit: f713411d4cfbd9c467aeda77b16ca6bc4db55d10

Author:    Anton Khirnov <anton at khirnov.net>
Committer: Anton Khirnov <anton at khirnov.net>
Date:      Sun Dec  9 18:52:55 2012 +0100

mdec: cosmetics, reformat

---

 libavcodec/mdec.c |  163 +++++++++++++++++++++++++++--------------------------
 1 files changed, 83 insertions(+), 80 deletions(-)

diff --git a/libavcodec/mdec.c b/libavcodec/mdec.c
index ec09124..b5ea84c 100644
--- a/libavcodec/mdec.c
+++ b/libavcodec/mdec.c
@@ -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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