+typedef struct InternalBuffer{
+ int last_pic_num;
+ uint8_t *base[4];
+ uint8_t *data[4];
+ int linesize[4];
+}InternalBuffer;
+
+#define INTERNAL_BUFFER_SIZE 32
+
+#define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
+
+void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
+ int w_align= 1;
+ int h_align= 1;
+
+ switch(s->pix_fmt){
+ case PIX_FMT_YUV420P:
+ case PIX_FMT_YUV422:
+ case PIX_FMT_UYVY422:
+ case PIX_FMT_YUV422P:
+ case PIX_FMT_YUV444P:
+ case PIX_FMT_GRAY8:
+ case PIX_FMT_YUVJ420P:
+ case PIX_FMT_YUVJ422P:
+ case PIX_FMT_YUVJ444P:
+ w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
+ h_align= 16;
+ break;
+ case PIX_FMT_YUV411P:
+ w_align=32;
+ h_align=8;
+ break;
+ case PIX_FMT_YUV410P:
+ if(s->codec_id == CODEC_ID_SVQ1){
+ w_align=64;
+ h_align=64;
+ }
+ case PIX_FMT_RGB555:
+ if(s->codec_id == CODEC_ID_RPZA){
+ w_align=4;
+ h_align=4;
+ }
+ case PIX_FMT_PAL8:
+ if(s->codec_id == CODEC_ID_SMC){
+ w_align=4;
+ h_align=4;
+ }
+ break;
+ default:
+ w_align= 1;
+ h_align= 1;
+ break;
+ }
+
+ *width = ALIGN(*width , w_align);
+ *height= ALIGN(*height, h_align);
+}
+
+int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
+ int i;
+ int w= s->width;
+ int h= s->height;
+ InternalBuffer *buf;
+ int *picture_number;
+
+ 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];
+ picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
+ (*picture_number)++;
+
+ if(buf->base[0]){
+ pic->age= *picture_number - buf->last_pic_num;
+ buf->last_pic_num= *picture_number;
+ }else{
+ int h_chroma_shift, v_chroma_shift;
+ int s_align, 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:
+ case PIX_FMT_UYVY422:
+ 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;
+ }
+
+ avcodec_align_dimensions(s, &w, &h);
+#if defined(ARCH_POWERPC) || defined(HAVE_MMI) //FIXME some cleaner check
+ s_align= 16;
+#else
+ s_align= 8;
+#endif
+
+ 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;
+
+ //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
+ buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, s_align<<(h_chroma_shift-h_shift));
+
+ buf->base[i]= av_mallocz((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
+ if(buf->base[i]==NULL) return -1;
+ memset(buf->base[i], 128, buf->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] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), s_align);
+ }
+ 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];
+ pic->linesize[i]= buf->linesize[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);
+ assert(s->internal_buffer_count);
+
+ buf = NULL; /* avoids warning */
+ 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);
+}
+
+int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
+ AVFrame temp_pic;
+ int i;
+
+ /* If no picture return a new buffer */
+ if(pic->data[0] == NULL) {
+ /* We will copy from buffer, so must be readable */
+ pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
+ return s->get_buffer(s, pic);
+ }
+
+ /* If internal buffer type return the same buffer */
+ if(pic->type == FF_BUFFER_TYPE_INTERNAL)
+ return 0;
+
+ /*
+ * Not internal type and reget_buffer not overridden, emulate cr buffer
+ */
+ temp_pic = *pic;
+ for(i = 0; i < 4; i++)
+ pic->data[i] = pic->base[i] = NULL;
+ pic->opaque = NULL;
+ /* Allocate new frame */
+ if (s->get_buffer(s, pic))
+ return -1;
+ /* Copy image data from old buffer to new buffer */
+ img_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
+ s->height);
+ s->release_buffer(s, &temp_pic); // Release old frame
+ return 0;
+}
+
+int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){
+ int i;
+
+ for(i=0; i<count; i++){
+ int r= func(c, arg[i]);
+ if(ret) ret[i]= r;
+ }
+ return 0;
+}
+
+enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
+ return fmt[0];
+}
+
+static const char* context_to_name(void* ptr) {
+ AVCodecContext *avc= ptr;
+
+ if(avc && avc->codec && avc->codec->name)
+ return avc->codec->name;
+ else
+ return "NULL";
+}
+
+static AVClass av_codec_context_class = { "AVCodecContext", context_to_name };
+