+++ /dev/null
-/*
- * utils for libavcodec
- * Copyright (c) 2001 Fabrice Bellard.
- *
- * 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 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
- * Lesser General Public License for more details.
- *
- * 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
- */
-
-/**
- * @file utils.c
- * utils.
- */
-
-#include "avcodec.h"
-#include "dsputil.h"
-#include "mpegvideo.h"
-
-void *av_mallocz(unsigned int size)
-{
- void *ptr;
-
- 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;
-
-void register_avcodec(AVCodec *format)
-{
- AVCodec **p;
- p = &first_avcodec;
- while (*p != NULL) p = &(*p)->next;
- *p = 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);
- 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);
-}
-
-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;
-
- 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);
- if (!avctx->priv_data)
- return -ENOMEM;
- } else {
- avctx->priv_data = NULL;
- }
- ret = avctx->codec->init(avctx);
- if (ret < 0) {
- av_freep(&avctx->priv_data);
- return ret;
- }
- return 0;
-}
-
-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;
-}
-
-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.
- * @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_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;
-}
-
-/* decode an audio frame. return -1 if error, otherwise return the
- *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_t *samples,
- int *frame_size_ptr,
- uint8_t *buf, int buf_size)
-{
- int ret;
-
- ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
- buf, buf_size);
- avctx->frame_number++;
- return ret;
-}
-
-int avcodec_close(AVCodecContext *avctx)
-{
- if (avctx->codec->close)
- avctx->codec->close(avctx);
- av_freep(&avctx->priv_data);
- avctx->codec = NULL;
- return 0;
-}
-
-AVCodec *avcodec_find_encoder(enum CodecID id)
-{
- AVCodec *p;
- p = first_avcodec;
- while (p) {
- if (p->encode != NULL && p->id == id)
- return p;
- p = p->next;
- }
- return NULL;
-}
-
-AVCodec *avcodec_find_encoder_by_name(const char *name)
-{
- AVCodec *p;
- p = first_avcodec;
- while (p) {
- if (p->encode != NULL && strcmp(name,p->name) == 0)
- return p;
- p = p->next;
- }
- return NULL;
-}
-
-AVCodec *avcodec_find_decoder(enum CodecID id)
-{
- AVCodec *p;
- p = first_avcodec;
- while (p) {
- if (p->decode != NULL && p->id == id)
- return p;
- p = p->next;
- }
- return NULL;
-}
-
-AVCodec *avcodec_find_decoder_by_name(const char *name)
-{
- AVCodec *p;
- p = first_avcodec;
- while (p) {
- if (p->decode != NULL && strcmp(name,p->name) == 0)
- return p;
- p = p->next;
- }
- return NULL;
-}
-
-AVCodec *avcodec_find(enum CodecID id)
-{
- AVCodec *p;
- p = first_avcodec;
- while (p) {
- if (p->id == id)
- return p;
- p = p->next;
- }
- return NULL;
-}
-
-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)
- p = avcodec_find_encoder(enc->codec_id);
- else
- p = avcodec_find_decoder(enc->codec_id);
-
- 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_name[0] != '\0') {
- codec_name = enc->codec_name;
- } else {
- /* output avi tags */
- if (enc->codec_type == CODEC_TYPE_VIDEO) {
- snprintf(buf1, sizeof(buf1), "%c%c%c%c",
- enc->codec_tag & 0xff,
- (enc->codec_tag >> 8) & 0xff,
- (enc->codec_tag >> 16) & 0xff,
- (enc->codec_tag >> 24) & 0xff);
- } else {
- snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
- }
- codec_name = buf1;
- }
-
- switch(enc->codec_type) {
- case CODEC_TYPE_VIDEO:
- snprintf(buf, buf_size,
- "Video: %s%s",
- codec_name, enc->mb_decision ? " (hq)" : "");
- if (enc->codec_id == CODEC_ID_RAWVIDEO) {
- snprintf(buf + strlen(buf), buf_size - strlen(buf),
- ", %s",
- 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 / 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;
- case CODEC_TYPE_AUDIO:
- 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,
- channels_str);
- }
-
- /* for PCM codecs, compute bitrate directly */
- switch(enc->codec_id) {
- case CODEC_ID_PCM_S16LE:
- case CODEC_ID_PCM_S16BE:
- case CODEC_ID_PCM_U16LE:
- case CODEC_ID_PCM_U16BE:
- bitrate = enc->sample_rate * enc->channels * 16;
- break;
- case CODEC_ID_PCM_S8:
- case CODEC_ID_PCM_U8:
- case CODEC_ID_PCM_ALAW:
- case CODEC_ID_PCM_MULAW:
- bitrate = enc->sample_rate * enc->channels * 8;
- break;
- default:
- bitrate = enc->bit_rate;
- break;
- }
- break;
- default:
- 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),
- ", %d kb/s", bitrate / 1000);
- }
-}
-
-unsigned avcodec_version( void )
-{
- return LIBAVCODEC_VERSION_INT;
-}
-
-unsigned avcodec_build( void )
-{
- return LIBAVCODEC_BUILD;
-}
-
-/* must be called before any other functions */
-void avcodec_init(void)
-{
- static int inited = 0;
-
- if (inited != 0)
- return;
- inited = 1;
-
- dsputil_static_init();
-}
-
-/**
- * Flush buffers, should be called when seeking or when swicthing to a different stream.
- */
-void avcodec_flush_buffers(AVCodecContext *avctx)
-{
- if(avctx->codec->flush)
- avctx->codec->flush(avctx);
-}
-
-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){
- int exact=1, sign=0;
- int64_t gcd, larger;
-
- assert(den != 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;
-}
-
-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;
-
- l += (h%c)<<32;
-
- return ((h/c)<<32) + l/c;
-}
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