--- /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;
+}
projects / synfig.git / blobdiff