/*
* utils for libavcodec
* Copyright (c) 2001 Fabrice Bellard.
+ * Copyright (c) 2003 Michel Bardiaux for the av_log API
+ * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms 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
*/
+
+/**
+ * @file utils.c
+ * utils.
+ */
+
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
+#include "integer.h"
+#include <stdarg.h>
+#include <limits.h>
+
+static void avcodec_default_free_buffers(AVCodecContext *s);
void *av_mallocz(unsigned int size)
{
void *ptr;
+
ptr = av_malloc(size);
if (!ptr)
return NULL;
return ptr;
}
-/* cannot call it directly because of 'void **' casting is not automatic */
-void __av_freep(void **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= 17*min_size/16 + 32;
+
+ return av_realloc(ptr, *size);
+}
+
+
+static unsigned int last_static = 0;
+static unsigned int allocated_static = 0;
+static void** array_static = NULL;
+
+/**
+ * allocation of static arrays - do not use for normal allocation.
+ */
+void *av_mallocz_static(unsigned int size)
+{
+ void *ptr = av_mallocz(size);
+
+ if(ptr){
+ array_static =av_fast_realloc(array_static, &allocated_static, sizeof(void*)*(last_static+1));
+ array_static[last_static++] = ptr;
+ }
+
+ return ptr;
+}
+
+/**
+ * free all static arrays and reset pointers to 0.
+ */
+void av_free_static(void)
+{
+ while(last_static){
+ av_freep(&array_static[--last_static]);
+ }
+ av_freep(&array_static);
+}
+
+/**
+ * Frees memory and sets the pointer to NULL.
+ * @param arg pointer to the pointer which should be freed
+ */
+void av_freep(void *arg)
+{
+ void **ptr= (void**)arg;
av_free(*ptr);
*ptr = NULL;
}
format->next = NULL;
}
+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 };
+
void avcodec_get_context_defaults(AVCodecContext *s){
+ memset(s, 0, sizeof(AVCodecContext));
+
+ s->av_class= &av_codec_context_class;
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->error_concealment= 3;
s->error_resilience= 1;
s->workaround_bugs= FF_BUG_AUTODETECT;
- s->frame_rate = 25 * FRAME_RATE_BASE;
+ 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->execute= avcodec_default_execute;
+ s->thread_count=1;
+ s->me_subpel_quality=8;
+ s->lmin= FF_QP2LAMBDA * s->qmin;
+ s->lmax= FF_QP2LAMBDA * s->qmax;
+ s->sample_aspect_ratio= (AVRational){0,1};
+ s->ildct_cmp= FF_CMP_VSAD;
+
+ s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
+ s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
+ s->palctrl = NULL;
+ s->reget_buffer= avcodec_default_reget_buffer;
}
/**
* this can be deallocated by simply calling free()
*/
AVCodecContext *avcodec_alloc_context(void){
- AVCodecContext *avctx= av_mallocz(sizeof(AVCodecContext));
+ AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
if(avctx==NULL) return NULL;
return avctx;
}
+void avcodec_get_frame_defaults(AVFrame *pic){
+ memset(pic, 0, sizeof(AVFrame));
+
+ pic->pts= AV_NOPTS_VALUE;
+}
+
+/**
+ * allocates a AVPFrame and set it to defaults.
+ * this can be deallocated by simply calling free()
+ */
+AVFrame *avcodec_alloc_frame(void){
+ AVFrame *pic= av_malloc(sizeof(AVFrame));
+
+ if(pic==NULL) return NULL;
+
+ avcodec_get_frame_defaults(pic);
+
+ return pic;
+}
+
int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
{
int ret;
+ if(avctx->codec)
+ return -1;
+
avctx->codec = codec;
+ avctx->codec_id = codec->id;
avctx->frame_number = 0;
if (codec->priv_data_size > 0) {
avctx->priv_data = av_mallocz(codec->priv_data_size);
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;
-
- ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
- avctx->frame_number++;
- return ret;
+ if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
+ int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
+ avctx->frame_number++;
+ return ret;
+ }else
+ return 0;
}
-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);
+ if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
+ int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
+ avctx->frame_number++;
+ emms_c(); //needed to avoid a emms_c() call before every return;
- emms_c(); //needed to avoid a emms_c() call before every return;
-
- avctx->frame_number++;
- return ret;
+ return ret;
+ }else
+ return 0;
}
-/* 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;
-
+
+ *got_picture_ptr= 0;
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;
*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;
+ *frame_size_ptr= 0;
ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
buf, buf_size);
avctx->frame_number++;
{
if (avctx->codec->close)
avctx->codec->close(avctx);
+ avcodec_default_free_buffers(avctx);
av_freep(&avctx->priv_data);
avctx->codec = NULL;
return 0;
return NULL;
}
-AVCodec *avcodec_find(enum CodecID id)
+static AVCodec *avcodec_find(enum CodecID id)
{
AVCodec *p;
p = first_avcodec;
return NULL;
}
-const char *pix_fmt_str[] = {
- "yuv420p",
- "yuv422",
- "rgb24",
- "bgr24",
- "yuv422p",
- "yuv444p",
- "rgba32",
- "bgra32",
- "yuv410p",
- "yuv411p",
-};
-
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
{
const char *codec_name;
if (p) {
codec_name = p->name;
+ if (!encode && enc->codec_id == CODEC_ID_MP3) {
+ if (enc->sub_id == 2)
+ codec_name = "mp2";
+ else if (enc->sub_id == 1)
+ codec_name = "mp1";
+ }
+ } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
+ /* fake mpeg2 transport stream codec (currently not
+ registered) */
+ codec_name = "mpeg2ts";
} else if (enc->codec_name[0] != '\0') {
codec_name = enc->codec_name;
} else {
case CODEC_TYPE_VIDEO:
snprintf(buf, buf_size,
"Video: %s%s",
- codec_name, enc->flags & CODEC_FLAG_HQ ? " (hq)" : "");
+ codec_name, enc->mb_decision ? " (hq)" : "");
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),
break;
}
break;
+ case CODEC_TYPE_DATA:
+ snprintf(buf, buf_size, "Data: %s", codec_name);
+ bitrate = enc->bit_rate;
+ break;
default:
av_abort();
}
}
}
-/* Picture field are filled with 'ptr' addresses */
-void avpicture_fill(AVPicture *picture, UINT8 *ptr,
- int pix_fmt, int width, int height)
-{
- 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_RGBA32:
- case PIX_FMT_BGRA32:
- picture->data[0] = ptr;
- picture->data[1] = NULL;
- picture->data[2] = NULL;
- picture->linesize[0] = width * 4;
- 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;
- }
-}
-
-int avpicture_get_size(int pix_fmt, int width, int height)
-{
- 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_RGBA32:
- case PIX_FMT_BGRA32:
- size = (size * 4);
- break;
- case PIX_FMT_YUV422:
- size = (size * 2);
- break;
- default:
- size = -1;
- break;
- }
- return size;
-}
-
unsigned avcodec_version( void )
{
return LIBAVCODEC_VERSION_INT;
return;
inited = 1;
- //dsputil_init();
+ dsputil_static_init();
}
-/* this should be called after seeking and before trying to decode the next frame */
+/**
+ * Flush buffers, should be called when seeking or when swicthing to a different stream.
+ */
void avcodec_flush_buffers(AVCodecContext *avctx)
{
- MpegEncContext *s = avctx->priv_data;
- s->num_available_buffers=0;
+ if(avctx->codec->flush)
+ avctx->codec->flush(avctx);
+}
+
+static void avcodec_default_free_buffers(AVCodecContext *s){
+ int i, j;
+
+ 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;
+}
+
+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 '?';
+ }
+}
+
+int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max){
+ AVRational a0={0,1}, a1={1,0};
+ int sign= (nom<0) ^ (den<0);
+ int64_t gcd= ff_gcd(ABS(nom), ABS(den));
+
+ nom = ABS(nom)/gcd;
+ den = ABS(den)/gcd;
+ if(nom<=max && den<=max){
+ a1= (AVRational){nom, den};
+ den=0;
+ }
+
+ while(den){
+ int64_t x = nom / den;
+ int64_t next_den= nom - den*x;
+ int64_t a2n= x*a1.num + a0.num;
+ int64_t a2d= x*a1.den + a0.den;
+
+ if(a2n > max || a2d > max) break;
+
+ a0= a1;
+ a1= (AVRational){a2n, a2d};
+ nom= den;
+ den= next_den;
+ }
+ assert(ff_gcd(a1.num, a1.den) == 1);
+
+ *dst_nom = sign ? -a1.num : a1.num;
+ *dst_den = a1.den;
+
+ return den==0;
+}
+
+int64_t av_rescale(int64_t a, int64_t b, int64_t c){
+ AVInteger ai, ci;
+ assert(c > 0);
+ assert(b >=0);
+
+ if(a<0) return -av_rescale(-a, b, c);
+
+ if(b<=INT_MAX && c<=INT_MAX){
+ if(a<=INT_MAX)
+ return (a * b + c/2)/c;
+ else
+ return a/c*b + (a%c*b + c/2)/c;
+ }
+
+ ai= av_mul_i(av_int2i(a), av_int2i(b));
+ ci= av_int2i(c);
+ ai= av_add_i(ai, av_shr_i(ci,1));
+
+ return av_i2int(av_div_i(ai, ci));
+}
+
+/* av_log API */
+
+static int av_log_level = AV_LOG_DEBUG;
+
+static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
+{
+ static int print_prefix=1;
+ AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
+ if(level>av_log_level)
+ return;
+#undef fprintf
+ if(print_prefix && avc) {
+ fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);
+ }
+#define fprintf please_use_av_log
+
+ print_prefix= strstr(fmt, "\n") != NULL;
+
+ vfprintf(stderr, fmt, vl);
+}
+
+static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
+
+void av_log(void* avcl, int level, const char *fmt, ...)
+{
+ va_list vl;
+ va_start(vl, fmt);
+ av_vlog(avcl, level, fmt, vl);
+ va_end(vl);
}
+void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
+{
+ av_log_callback(avcl, level, fmt, vl);
+}
-static int raw_encode_init(AVCodecContext *s)
+int av_log_get_level(void)
{
- return 0;
+ return av_log_level;
}
-static int raw_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- UINT8 *buf, int buf_size)
+void av_log_set_level(int level)
{
- return -1;
+ av_log_level = level;
}
-static int raw_encode_frame(AVCodecContext *avctx,
- unsigned char *frame, int buf_size, void *data)
+void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
{
- return -1;
+ av_log_callback = callback;
}
-AVCodec rawvideo_codec = {
- "rawvideo",
- CODEC_TYPE_VIDEO,
- CODEC_ID_RAWVIDEO,
- 0,
- raw_encode_init,
- raw_encode_frame,
- NULL,
- raw_decode_frame,
-};
+#if !defined(HAVE_PTHREADS) && !defined(HAVE_W32THREADS)
+int avcodec_thread_init(AVCodecContext *s, int thread_count){
+ return -1;
+}
+#endif
projects / ffmpeg / blobdiff