AVCodec.flush()

ff_draw_horiz_band() in coded order / cleanup

Originally committed as revision 2064 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/avcodec.h

@@ -15,8 +15,8 @@ extern "C" {
 
 #define LIBAVCODEC_VERSION_INT 0x000406
 #define LIBAVCODEC_VERSION     "0.4.6"
-#define LIBAVCODEC_BUILD       4669
-#define LIBAVCODEC_BUILD_STR   "4669"
+#define LIBAVCODEC_BUILD       4670
+#define LIBAVCODEC_BUILD_STR   "4670"
 
 #define LIBAVCODEC_IDENT	"FFmpeg" LIBAVCODEC_VERSION "b" LIBAVCODEC_BUILD_STR
 
@@ -473,7 +473,7 @@ typedef struct AVCodecContext {
      * - decoding: set by user.
      */
     void (*draw_horiz_band)(struct AVCodecContext *s,
-                            uint8_t **src_ptr, int linesize,
+                            AVFrame *src, int offset[4],
                             int y, int width, int height);
 
     /* audio only */
@@ -1209,6 +1209,7 @@ typedef struct AVCodec {
     int capabilities;
     const AVOption *options;
     struct AVCodec *next;
+    void (*flush)(AVCodecContext *);
 } AVCodec;
 
 /**
@@ -1400,7 +1401,12 @@ int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
 void avcodec_default_free_buffers(AVCodecContext *s);
 
+/**
+ * opens / inits the AVCodecContext.
+ * not thread save!
+ */
 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
+
 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples, 
                          int *frame_size_ptr,
                          uint8_t *buf, int buf_size);

libavcodec/h263dec.c

@@ -723,6 +723,7 @@ AVCodec mpeg4_decoder = {
     ff_h263_decode_frame,
     CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
     .options = mpeg4_decoptions,
+    .flush= ff_mpeg_flush,
 };
 
 AVCodec h263_decoder = {
@@ -735,6 +736,7 @@ AVCodec h263_decoder = {
     ff_h263_decode_end,
     ff_h263_decode_frame,
     CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
+    .flush= ff_mpeg_flush,
 };
 
 AVCodec msmpeg4v1_decoder = {

libavcodec/huffyuv.c

@@ -673,7 +673,7 @@ static void decode_bgr_bitstream(HYuvContext *s, int count){
 
 static void draw_slice(HYuvContext *s, int y){
     int h, cy;
-    uint8_t *src_ptr[3];
+    int offset[4];
     
     if(s->avctx->draw_horiz_band==NULL) 
         return;
@@ -686,13 +686,14 @@ static void draw_slice(HYuvContext *s, int y){
     }else{
         cy= y;
     }
-    
-    src_ptr[0] = s->picture.data[0] + s->picture.linesize[0]*y;
-    src_ptr[1] = s->picture.data[1] + s->picture.linesize[1]*cy;
-    src_ptr[2] = s->picture.data[2] + s->picture.linesize[2]*cy;
+
+    offset[0] = s->picture.linesize[0]*y;
+    offset[1] = s->picture.linesize[1]*cy;
+    offset[2] = s->picture.linesize[2]*cy;
+    offset[3] = 0;
     emms_c();
 
-    s->avctx->draw_horiz_band(s->avctx, src_ptr, s->picture.linesize[0], y, s->width, h);
+    s->avctx->draw_horiz_band(s->avctx, &s->picture, offset, y, s->width, h);
     
     s->last_slice_end= y + h;
 }

libavcodec/mpeg12.c

@@ -2356,4 +2356,5 @@ AVCodec mpeg_decoder = {
     mpeg_decode_end,
     mpeg_decode_frame,
     CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
+    .flush= ff_mpeg_flush,
 };

libavcodec/mpegvideo.c

@@ -2725,29 +2725,26 @@ static int pix_diff_vcmp16x8(uint8_t *s1, uint8_t*s2, int stride){ //FIXME move
  * @param h is the normal height, this will be reduced automatically if needed for the last row
  */
 void ff_draw_horiz_band(MpegEncContext *s, int y, int h){
-    if (    s->avctx->draw_horiz_band 
-        && (s->last_picture_ptr || s->low_delay) ) {
+    if (s->avctx->draw_horiz_band) {
         uint8_t *src_ptr[3];
-        int offset;
+        int offset[4];
         h= FFMIN(h, s->height - y);
 
-        if(s->pict_type==B_TYPE && s->picture_structure == PICT_FRAME)
-            offset = 0;
-        else
-            offset = y * s->linesize;
-
-        if(s->pict_type==B_TYPE || s->low_delay){
-            src_ptr[0] = s->current_picture.data[0] + offset;
-            src_ptr[1] = s->current_picture.data[1] + (offset >> 2);
-            src_ptr[2] = s->current_picture.data[2] + (offset >> 2);
-        } else {
-            src_ptr[0] = s->last_picture.data[0] + offset;
-            src_ptr[1] = s->last_picture.data[1] + (offset >> 2);
-            src_ptr[2] = s->last_picture.data[2] + (offset >> 2);
+        if(s->pict_type==B_TYPE && s->picture_structure == PICT_FRAME){
+            offset[0]=
+            offset[1]=
+            offset[2]=
+            offset[3]= 0;
+        }else{
+            offset[0]= y * s->linesize;;
+            offset[1]= 
+            offset[2]= (y>>1) * s->uvlinesize;;
+            offset[3]= 0;
         }
+
         emms_c();
 
-        s->avctx->draw_horiz_band(s->avctx, src_ptr, s->linesize,
+        s->avctx->draw_horiz_band(s->avctx, (AVFrame*)s->current_picture_ptr, offset,
                                y, s->width, h);
     }
 }
@@ -3076,6 +3073,18 @@ int ff_combine_frame( MpegEncContext *s, int next, uint8_t **buf, int *buf_size)
     return 0;
 }
 
+void ff_mpeg_flush(AVCodecContext *avctx){
+    int i;
+    MpegEncContext *s = avctx->priv_data;
+    
+    for(i=0; i<MAX_PICTURE_COUNT; i++){
+       if(s->picture[i].data[0] && (   s->picture[i].type == FF_BUFFER_TYPE_INTERNAL
+                                    || s->picture[i].type == FF_BUFFER_TYPE_USER))
+        avctx->release_buffer(avctx, (AVFrame*)&s->picture[i]);
+    }
+    s->last_picture_ptr = s->next_picture_ptr = NULL;
+}
+
 #ifdef CONFIG_ENCODERS
 void ff_copy_bits(PutBitContext *pb, uint8_t *src, int length)
 {

libavcodec/mpegvideo.h

@@ -713,6 +713,7 @@ void ff_emulated_edge_mc(uint8_t *buf, uint8_t *src, int linesize, int block_w,
                                     int src_x, int src_y, int w, int h);
 #define END_NOT_FOUND -100
 int ff_combine_frame( MpegEncContext *s, int next, uint8_t **buf, int *buf_size);
+void ff_mpeg_flush(AVCodecContext *avctx);
 void ff_print_debug_info(MpegEncContext *s, Picture *pict);
 
 void ff_er_frame_start(MpegEncContext *s);

libavcodec/svq1.c

@@ -838,4 +838,5 @@ AVCodec svq1_decoder = {
     svq1_decode_end,
     svq1_decode_frame,
     CODEC_CAP_DR1,
+    .flush= ff_mpeg_flush,
 };

libavcodec/utils.c

@@ -590,39 +590,13 @@ void avcodec_init(void)
     dsputil_static_init();
 }
 
-/* this can be called after seeking and before trying to decode the next keyframe */
+/**
+ * Flush buffers, should be called when seeking or when swicthing to a different stream.
+ */
 void avcodec_flush_buffers(AVCodecContext *avctx)
 {
-    int i;
-    MpegEncContext *s = avctx->priv_data;
-    
-    switch(avctx->codec_id){
-    case CODEC_ID_MPEG1VIDEO:
-    case CODEC_ID_H263:
-    case CODEC_ID_RV10:
-//    case CODEC_ID_MJPEG:
-//    case CODEC_ID_MJPEGB:
-    case CODEC_ID_MPEG4:
-    case CODEC_ID_MSMPEG4V1:
-    case CODEC_ID_MSMPEG4V2:
-    case CODEC_ID_MSMPEG4V3:
-    case CODEC_ID_WMV1:
-    case CODEC_ID_WMV2:
-    case CODEC_ID_H263P:
-    case CODEC_ID_H263I:
-    case CODEC_ID_FLV1:
-    case CODEC_ID_SVQ1:
-        for(i=0; i<MAX_PICTURE_COUNT; i++){
-           if(s->picture[i].data[0] && (   s->picture[i].type == FF_BUFFER_TYPE_INTERNAL
-                                        || s->picture[i].type == FF_BUFFER_TYPE_USER))
-            avctx->release_buffer(avctx, (AVFrame*)&s->picture[i]);
-	}
-	s->last_picture_ptr = s->next_picture_ptr = NULL;
-        break;
-    default:
-        //FIXME
-        break;
-    }
+    if(avctx->codec->flush)
+        avctx->codec->flush(avctx);
 }
 
 void avcodec_default_free_buffers(AVCodecContext *s){