X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Futils.c;h=3a30e734e44e587fb7367ca328a63ae584bea683;hb=3efd4952dfcc0e452d28910758876884925c6175;hp=d3244dfff3786ab2c1a1c1220270c3b0baaadb3d;hpb=0344cd0a7cc91e49637b85221a61aede8e9bd888;p=ffmpeg

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index d3244dfff37..3a30e734e44 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1,57 +1,112 @@
 /*
  * utils for libavcodec
- * Copyright (c) 2001 Gerard Lantau.
+ * Copyright (c) 2001 Fabrice Bellard.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * This library 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.
  *
- * This program is distributed in the hope that it will be useful,
+ * This library 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 General Public License for more details.
+ * 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 General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include "common.h"
-#include "dsputil.h"
+ 
+/**
+ * @file utils.c
+ * utils.
+ */
+ 
 #include "avcodec.h"
-#ifdef HAVE_MALLOC_H
-#include <malloc.h>
-#else
-#include <stdlib.h>
-#endif
+#include "dsputil.h"
+#include "mpegvideo.h"
 
-/* memory alloc */
-void *av_mallocz(int size)
+void *av_mallocz(unsigned int size)
 {
     void *ptr;
-#if defined ( ARCH_X86 ) && defined ( HAVE_MEMALIGN )
-    ptr = memalign(64,size);
-    /* Why 64? 
-       Indeed, we should align it:
-         on 4 for 386
-         on 16 for 486
-	 on 32 for 586, PPro - k6-III
-	 on 64 for K7 (maybe for P3 too).
-       Because L1 and L2 caches are aligned on those values.
-       But I don't want to code such logic here!
-     */
-#else
-    ptr = malloc(size);
-#endif
+    
+    ptr = av_malloc(size);
     if (!ptr)
         return NULL;
     memset(ptr, 0, size);
     return ptr;
 }
 
+char *av_strdup(const char *s)
+{
+    char *ptr;
+    int len;
+    len = strlen(s) + 1;
+    ptr = av_malloc(len);
+    if (!ptr)
+        return NULL;
+    memcpy(ptr, s, len);
+    return ptr;
+}
+
+/**
+ * realloc which does nothing if the block is large enough
+ */
+void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
+{
+    if(min_size < *size) 
+        return ptr;
+    
+    *size= min_size + 10*1024;
+
+    return av_realloc(ptr, *size);
+}
+
+
+/* allocation of static arrays - do not use for normal allocation */
+static unsigned int last_static = 0;
+static char*** array_static = NULL;
+static const unsigned int grow_static = 64; // ^2
+void *__av_mallocz_static(void** location, unsigned int size)
+{
+    unsigned int l = (last_static + grow_static) & ~(grow_static - 1);
+    void *ptr = av_mallocz(size);
+    if (!ptr)
+	return NULL;
+
+    if (location)
+    {
+	if (l > last_static)
+	    array_static = av_realloc(array_static, l);
+	array_static[last_static++] = (char**) location;
+	*location = ptr;
+    }
+    return ptr;
+}
+/* free all static arrays and reset pointers to 0 */
+void av_free_static(void)
+{
+    if (array_static)
+    {
+	unsigned i;
+	for (i = 0; i < last_static; i++)
+	{
+	    av_free(*array_static[i]);
+            *array_static[i] = NULL;
+	}
+	av_free(array_static);
+	array_static = 0;
+    }
+    last_static = 0;
+}
+
+/* cannot call it directly because of 'void **' casting is not automatic */
+void __av_freep(void **ptr)
+{
+    av_free(*ptr);
+    *ptr = NULL;
+}
+
 /* encoder management */
 AVCodec *first_avcodec;
 
@@ -64,25 +119,209 @@ void register_avcodec(AVCodec *format)
     format->next = NULL;
 }
 
+typedef struct InternalBuffer{
+    int last_pic_num;
+    uint8_t *base[4];
+    uint8_t *data[4];
+}InternalBuffer;
+
+#define INTERNAL_BUFFER_SIZE 32
+
+int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
+    int i;
+    const int width = s->width;
+    const int height= s->height;
+    InternalBuffer *buf;
+    
+    assert(pic->data[0]==NULL);
+    assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);
+
+    if(s->internal_buffer==NULL){
+        s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
+    }
+#if 0
+    s->internal_buffer= av_fast_realloc(
+        s->internal_buffer, 
+        &s->internal_buffer_size, 
+        sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/
+        );
+#endif
+     
+    buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
+
+    if(buf->base[0]){
+        pic->age= pic->coded_picture_number - buf->last_pic_num;
+        buf->last_pic_num= pic->coded_picture_number;
+    }else{
+        int align, h_chroma_shift, v_chroma_shift;
+        int w, h, pixel_size;
+        
+        avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
+        switch(s->pix_fmt){
+        case PIX_FMT_RGB555:
+        case PIX_FMT_RGB565:
+        case PIX_FMT_YUV422:
+            pixel_size=2;
+            break;
+        case PIX_FMT_RGB24:
+        case PIX_FMT_BGR24:
+            pixel_size=3;
+            break;
+        case PIX_FMT_RGBA32:
+            pixel_size=4;
+            break;
+        default:
+            pixel_size=1;
+        }
+        
+        if(s->codec_id==CODEC_ID_SVQ1) align=63;
+        else                           align=15;
+    
+        w= (width +align)&~align;
+        h= (height+align)&~align;
+    
+        if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
+            w+= EDGE_WIDTH*2;
+            h+= EDGE_WIDTH*2;
+        }
+        
+        buf->last_pic_num= -256*256*256*64;
+
+        for(i=0; i<3; i++){
+            const int h_shift= i==0 ? 0 : h_chroma_shift;
+            const int v_shift= i==0 ? 0 : v_chroma_shift;
+
+            pic->linesize[i]= pixel_size*w>>h_shift;
+
+            buf->base[i]= av_mallocz((pic->linesize[i]*h>>v_shift)+16); //FIXME 16
+            if(buf->base[i]==NULL) return -1;
+            memset(buf->base[i], 128, pic->linesize[i]*h>>v_shift);
+        
+            if(s->flags&CODEC_FLAG_EMU_EDGE)
+                buf->data[i] = buf->base[i];
+            else
+                buf->data[i] = buf->base[i] + (pic->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift);
+        }
+        pic->age= 256*256*256*64;
+        pic->type= FF_BUFFER_TYPE_INTERNAL;
+    }
+
+    for(i=0; i<4; i++){
+        pic->base[i]= buf->base[i];
+        pic->data[i]= buf->data[i];
+    }
+    s->internal_buffer_count++;
+
+    return 0;
+}
+
+void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
+    int i;
+    InternalBuffer *buf, *last, temp;
+
+    assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
+
+    for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
+        buf= &((InternalBuffer*)s->internal_buffer)[i];
+        if(buf->data[0] == pic->data[0])
+            break;
+    }
+    assert(i < s->internal_buffer_count);
+    s->internal_buffer_count--;
+    last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
+
+    temp= *buf;
+    *buf= *last;
+    *last= temp;
+
+    for(i=0; i<3; i++){
+        pic->data[i]=NULL;
+//        pic->base[i]=NULL;
+    }
+//printf("R%X\n", pic->opaque);
+}
+
+enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, enum PixelFormat * fmt){
+    return fmt[0];
+}
+
+void avcodec_get_context_defaults(AVCodecContext *s){
+    s->bit_rate= 800*1000;
+    s->bit_rate_tolerance= s->bit_rate*10;
+    s->qmin= 2;
+    s->qmax= 31;
+    s->mb_qmin= 2;
+    s->mb_qmax= 31;
+    s->rc_eq= "tex^qComp";
+    s->qcompress= 0.5;
+    s->max_qdiff= 3;
+    s->b_quant_factor=1.25;
+    s->b_quant_offset=1.25;
+    s->i_quant_factor=-0.8;
+    s->i_quant_offset=0.0;
+    s->error_concealment= 3;
+    s->error_resilience= 1;
+    s->workaround_bugs= FF_BUG_AUTODETECT;
+    s->frame_rate_base= 1;
+    s->frame_rate = 25;
+    s->gop_size= 50;
+    s->me_method= ME_EPZS;
+    s->get_buffer= avcodec_default_get_buffer;
+    s->release_buffer= avcodec_default_release_buffer;
+    s->get_format= avcodec_default_get_format;
+    s->me_subpel_quality=8;
+    
+    s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
+    s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
+}
+
+/**
+ * allocates a AVCodecContext and set it to defaults.
+ * this can be deallocated by simply calling free() 
+ */
+AVCodecContext *avcodec_alloc_context(void){
+    AVCodecContext *avctx= av_mallocz(sizeof(AVCodecContext));
+    
+    if(avctx==NULL) return NULL;
+    
+    avcodec_get_context_defaults(avctx);
+    
+    return avctx;
+}
+
+/**
+ * allocates a AVPFrame and set it to defaults.
+ * this can be deallocated by simply calling free() 
+ */
+AVFrame *avcodec_alloc_frame(void){
+    AVFrame *pic= av_mallocz(sizeof(AVFrame));
+    
+    return pic;
+}
+
 int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
 {
     int ret;
 
     avctx->codec = codec;
+    avctx->codec_id = codec->id;
     avctx->frame_number = 0;
-    avctx->priv_data = av_mallocz(codec->priv_data_size);
-    if (!avctx->priv_data) 
-        return -ENOMEM;
+    if (codec->priv_data_size > 0) {
+        avctx->priv_data = av_mallocz(codec->priv_data_size);
+        if (!avctx->priv_data) 
+            return -ENOMEM;
+    } else {
+        avctx->priv_data = NULL;
+    }
     ret = avctx->codec->init(avctx);
     if (ret < 0) {
-        free(avctx->priv_data);
-        avctx->priv_data = NULL;
+        av_freep(&avctx->priv_data);
         return ret;
     }
     return 0;
 }
 
-int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size, 
+int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size, 
                          const short *samples)
 {
     int ret;
@@ -92,27 +331,39 @@ int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
     return ret;
 }
 
-int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size, 
-                         const AVPicture *pict)
+int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size, 
+                         const AVFrame *pict)
 {
     int ret;
 
     ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
+    
+    emms_c(); //needed to avoid a emms_c() call before every return;
+
     avctx->frame_number++;
     return ret;
 }
 
-/* decode a frame. return -1 if error, otherwise return the number of
-   bytes used. If no frame could be decompressed, *got_picture_ptr is
-   zero. Otherwise, it is non zero */
-int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture, 
+/** 
+ * decode a frame. 
+ * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes
+ * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
+ * @param buf_size the size of the buffer in bytes
+ * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero
+ * @return -1 if error, otherwise return the number of
+ * bytes used. 
+ */
+int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture, 
                          int *got_picture_ptr,
-                         UINT8 *buf, int buf_size)
+                         uint8_t *buf, int buf_size)
 {
     int ret;
-
+    
     ret = avctx->codec->decode(avctx, picture, got_picture_ptr, 
                                buf, buf_size);
+
+    emms_c(); //needed to avoid a emms_c() call before every return;
+    
     if (*got_picture_ptr)                           
         avctx->frame_number++;
     return ret;
@@ -122,9 +373,9 @@ int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture,
    *number of bytes used. If no frame could be decompressed,
    *frame_size_ptr is zero. Otherwise, it is the decompressed frame
    *size in BYTES. */
-int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples, 
+int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples, 
                          int *frame_size_ptr,
-                         UINT8 *buf, int buf_size)
+                         uint8_t *buf, int buf_size)
 {
     int ret;
 
@@ -138,8 +389,7 @@ int avcodec_close(AVCodecContext *avctx)
 {
     if (avctx->codec->close)
         avctx->codec->close(avctx);
-    free(avctx->priv_data);
-    avctx->priv_data = NULL;
+    av_freep(&avctx->priv_data);
     avctx->codec = NULL;
     return 0;
 }
@@ -204,20 +454,12 @@ AVCodec *avcodec_find(enum CodecID id)
     return NULL;
 }
 
-const char *pix_fmt_str[] = {
-    "yuv420p",
-    "yuv422",
-    "rgb24",
-    "bgr24",
-    "yuv422p",
-    "yuv444p",
-};
-    
 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
 {
     const char *codec_name;
     AVCodec *p;
     char buf1[32];
+    char channels_str[100];
     int bitrate;
 
     if (encode)
@@ -251,13 +493,17 @@ void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
         if (enc->codec_id == CODEC_ID_RAWVIDEO) {
             snprintf(buf + strlen(buf), buf_size - strlen(buf),
                      ", %s",
-                     pix_fmt_str[enc->pix_fmt]);
+                     avcodec_get_pix_fmt_name(enc->pix_fmt));
         }
         if (enc->width) {
             snprintf(buf + strlen(buf), buf_size - strlen(buf),
                      ", %dx%d, %0.2f fps",
                      enc->width, enc->height, 
-                     (float)enc->frame_rate / FRAME_RATE_BASE);
+                     (float)enc->frame_rate / enc->frame_rate_base);
+        }
+        if (encode) {
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", q=%d-%d", enc->qmin, enc->qmax);
         }
         bitrate = enc->bit_rate;
         break;
@@ -265,12 +511,27 @@ void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
         snprintf(buf, buf_size,
                  "Audio: %s",
                  codec_name);
+        switch (enc->channels) {
+            case 1:
+                strcpy(channels_str, "mono");
+                break;
+            case 2:
+                strcpy(channels_str, "stereo");
+                break;
+            case 6:
+                strcpy(channels_str, "5:1");
+                break;
+            default:
+                sprintf(channels_str, "%d channels", enc->channels);
+                break;
+        }
         if (enc->sample_rate) {
             snprintf(buf + strlen(buf), buf_size - strlen(buf),
                      ", %d Hz, %s",
                      enc->sample_rate,
-                     enc->channels == 2 ? "stereo" : "mono");
+                     channels_str);
         }
+        
         /* for PCM codecs, compute bitrate directly */
         switch(enc->codec_id) {
         case CODEC_ID_PCM_S16LE:
@@ -291,7 +552,15 @@ void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
         }
         break;
     default:
-        abort();
+        av_abort();
+    }
+    if (encode) {
+        if (enc->flags & CODEC_FLAG_PASS1)
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", pass 1");
+        if (enc->flags & CODEC_FLAG_PASS2)
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", pass 2");
     }
     if (bitrate != 0) {
         snprintf(buf + strlen(buf), buf_size - strlen(buf), 
@@ -299,89 +568,16 @@ void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
     }
 }
 
-/* Picture field are filled with 'ptr' addresses */
-void avpicture_fill(AVPicture *picture, UINT8 *ptr,
-                    int pix_fmt, int width, int height)
+unsigned avcodec_version( void )
 {
-    int size;
-
-    size = width * height;
-    switch(pix_fmt) {
-    case PIX_FMT_YUV420P:
-        picture->data[0] = ptr;
-        picture->data[1] = picture->data[0] + size;
-        picture->data[2] = picture->data[1] + size / 4;
-        picture->linesize[0] = width;
-        picture->linesize[1] = width / 2;
-        picture->linesize[2] = width / 2;
-        break;
-    case PIX_FMT_YUV422P:
-        picture->data[0] = ptr;
-        picture->data[1] = picture->data[0] + size;
-        picture->data[2] = picture->data[1] + size / 2;
-        picture->linesize[0] = width;
-        picture->linesize[1] = width / 2;
-        picture->linesize[2] = width / 2;
-        break;
-    case PIX_FMT_YUV444P:
-        picture->data[0] = ptr;
-        picture->data[1] = picture->data[0] + size;
-        picture->data[2] = picture->data[1] + size;
-        picture->linesize[0] = width;
-        picture->linesize[1] = width;
-        picture->linesize[2] = width;
-        break;
-    case PIX_FMT_RGB24:
-    case PIX_FMT_BGR24:
-        picture->data[0] = ptr;
-        picture->data[1] = NULL;
-        picture->data[2] = NULL;
-        picture->linesize[0] = width * 3;
-        break;
-    case PIX_FMT_YUV422:
-        picture->data[0] = ptr;
-        picture->data[1] = NULL;
-        picture->data[2] = NULL;
-        picture->linesize[0] = width * 2;
-        break;
-    default:
-        picture->data[0] = NULL;
-        picture->data[1] = NULL;
-        picture->data[2] = NULL;
-        break;
-    }
+  return LIBAVCODEC_VERSION_INT;
 }
 
-int avpicture_get_size(int pix_fmt, int width, int height)
+unsigned avcodec_build( void )
 {
-    int size;
-
-    size = width * height;
-    switch(pix_fmt) {
-    case PIX_FMT_YUV420P:
-        size = (size * 3) / 2;
-        break;
-    case PIX_FMT_YUV422P:
-        size = (size * 2);
-        break;
-    case PIX_FMT_YUV444P:
-        size = (size * 3);
-        break;
-    case PIX_FMT_RGB24:
-    case PIX_FMT_BGR24:
-        size = (size * 3);
-        break;
-    case PIX_FMT_YUV422:
-        size = (size * 2);
-        break;
-    default:
-        size = -1;
-        break;
-    }
-    return size;
+  return LIBAVCODEC_BUILD;
 }
 
-
 /* must be called before any other functions */
 void avcodec_init(void)
 {
@@ -391,93 +587,127 @@ void avcodec_init(void)
 	return;
     inited = 1;
 
-    dsputil_init();
+    dsputil_static_init();
 }
 
-/* simple call to use all the codecs */
-void avcodec_register_all(void)
+/* this can be called after seeking and before trying to decode the next keyframe */
+void avcodec_flush_buffers(AVCodecContext *avctx)
 {
-    static int inited = 0;
+    int i;
+    MpegEncContext *s = avctx->priv_data;
     
-    if (inited != 0)
-	return;
-    inited = 1;
+    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_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;
+    }
+}
 
-    /* encoders */
-#ifdef CONFIG_ENCODERS
-    register_avcodec(&ac3_encoder);
-    register_avcodec(&mp2_encoder);
-#ifdef CONFIG_MP3LAME
-    register_avcodec(&mp3lame_encoder);
-#endif
-    register_avcodec(&mpeg1video_encoder);
-    register_avcodec(&h263_encoder);
-    register_avcodec(&h263p_encoder);
-    register_avcodec(&rv10_encoder);
-    register_avcodec(&mjpeg_encoder);
-    register_avcodec(&mpeg4_encoder);
-    register_avcodec(&msmpeg4_encoder);
-#endif /* CONFIG_ENCODERS */
-    register_avcodec(&rawvideo_codec);
-
-    /* decoders */
-#ifdef CONFIG_DECODERS
-    register_avcodec(&h263_decoder);
-    register_avcodec(&mpeg4_decoder);
-    register_avcodec(&msmpeg4_decoder);
-    register_avcodec(&mpeg_decoder);
-    register_avcodec(&h263i_decoder);
-    register_avcodec(&rv10_decoder);
-    register_avcodec(&mjpeg_decoder);
-    register_avcodec(&mp3_decoder);
-#ifdef CONFIG_AC3
-    register_avcodec(&ac3_decoder);
-#endif
-#endif /* CONFIG_DECODERS */
+void avcodec_default_free_buffers(AVCodecContext *s){
+    int i, j;
 
-    /* pcm codecs */
+    if(s->internal_buffer==NULL) return;
+    
+    for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
+        InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
+        for(j=0; j<4; j++){
+            av_freep(&buf->base[j]);
+            buf->data[j]= NULL;
+        }
+    }
+    av_freep(&s->internal_buffer);
+    
+    s->internal_buffer_count=0;
+}
 
-#define PCM_CODEC(id, name) \
-    register_avcodec(& name ## _encoder); \
-    register_avcodec(& name ## _decoder); \
+char av_get_pict_type_char(int pict_type){
+    switch(pict_type){
+    case I_TYPE: return 'I'; 
+    case P_TYPE: return 'P'; 
+    case B_TYPE: return 'B'; 
+    case S_TYPE: return 'S'; 
+    case SI_TYPE:return 'i'; 
+    case SP_TYPE:return 'p'; 
+    default:     return '?';
+    }
+}
 
-PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
-PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
-PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
-PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
-PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
-PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
-PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
-PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
+int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max){
+    int exact=1, sign=0;
+    int64_t gcd, larger;
 
-#undef PCM_CODEC
-}
+    assert(den != 0);
 
-static int encode_init(AVCodecContext *s)
-{
-    return 0;
+    if(den < 0){
+        den= -den;
+        nom= -nom;
+    }
+    
+    if(nom < 0){
+        nom= -nom;
+        sign= 1;
+    }
+    
+    for(;;){ //note is executed 1 or 2 times 
+        gcd = ff_gcd(nom, den);
+        nom /= gcd;
+        den /= gcd;
+    
+        larger= FFMAX(nom, den);
+    
+        if(larger > max){
+            int64_t div= (larger + max - 1) / max;
+            nom =  (nom + div/2)/div;
+            den =  (den + div/2)/div;
+            exact=0;
+        }else 
+            break;
+    }
+    
+    if(sign) nom= -nom;
+    
+    *dst_nom = nom;
+    *dst_den = den;
+    
+    return exact;
 }
 
-static int decode_frame(AVCodecContext *avctx, 
-                        void *data, int *data_size,
-                        UINT8 *buf, int buf_size)
-{
-    return -1;
-}
+int64_t av_rescale(int64_t a, int b, int c){
+    uint64_t h, l;
+    assert(c > 0);
+    assert(b >=0);
+    
+    if(a<0) return -av_rescale(-a, b, c);
+    
+    h= a>>32;
+    if(h==0) return a*b/c;
+    
+    l= a&0xFFFFFFFF;
+    l *= b;
+    h *= b;
 
-static int encode_frame(AVCodecContext *avctx,
-                        unsigned char *frame, int buf_size, void *data)
-{
-    return -1;
-}
-
-AVCodec rawvideo_codec = {
-    "rawvideo",
-    CODEC_TYPE_VIDEO,
-    CODEC_ID_RAWVIDEO,
-    0,
-    encode_init,
-    encode_frame,
-    NULL,
-    decode_frame,
-};
+    l += (h%c)<<32;
+
+    return ((h/c)<<32) + l/c;
+}