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FFmpeg/libavcodec/utils.c

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/*
* utils for libavcodec
* Copyright (c) 2001 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* utils.
*/
#include "libavutil/avstring.h"
#include "libavutil/integer.h"
#include "libavutil/crc.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "dsputil.h"
#include "opt.h"
#include "imgconvert.h"
#include "audioconvert.h"
#include "internal.h"
#include <stdlib.h>
#include <stdarg.h>
#include <limits.h>
#include <float.h>
static int volatile entangled_thread_counter=0;
int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
static void *codec_mutex;
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
{
if(min_size < *size)
return ptr;
*size= FFMAX(17*min_size/16 + 32, min_size);
ptr= av_realloc(ptr, *size);
if(!ptr) //we could set this to the unmodified min_size but this is safer if the user lost the ptr and uses NULL now
*size= 0;
return ptr;
}
void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size)
{
void **p = ptr;
if (min_size < *size)
return;
*size= FFMAX(17*min_size/16 + 32, min_size);
av_free(*p);
*p = av_malloc(*size);
if (!*p) *size = 0;
}
/* encoder management */
static AVCodec *first_avcodec = NULL;
AVCodec *av_codec_next(AVCodec *c){
if(c) return c->next;
else return first_avcodec;
}
void avcodec_register(AVCodec *codec)
{
AVCodec **p;
avcodec_init();
p = &first_avcodec;
while (*p != NULL) p = &(*p)->next;
*p = codec;
codec->next = NULL;
}
#if LIBAVCODEC_VERSION_MAJOR < 53
void register_avcodec(AVCodec *codec)
{
avcodec_register(codec);
}
#endif
unsigned avcodec_get_edge_width(void)
{
return EDGE_WIDTH;
}
void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
s->coded_width = width;
s->coded_height= height;
s->width = -((-width )>>s->lowres);
s->height= -((-height)>>s->lowres);
}
typedef struct InternalBuffer{
int last_pic_num;
uint8_t *base[4];
uint8_t *data[4];
int linesize[4];
int width, height;
enum PixelFormat pix_fmt;
}InternalBuffer;
#define INTERNAL_BUFFER_SIZE 32
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
int w_align= 1;
int h_align= 1;
switch(s->pix_fmt){
case PIX_FMT_YUV420P:
case PIX_FMT_YUYV422:
case PIX_FMT_UYVY422:
case PIX_FMT_YUV422P:
case PIX_FMT_YUV440P:
case PIX_FMT_YUV444P:
case PIX_FMT_GRAY8:
case PIX_FMT_GRAY16BE:
case PIX_FMT_GRAY16LE:
case PIX_FMT_YUVJ420P:
case PIX_FMT_YUVJ422P:
case PIX_FMT_YUVJ440P:
case PIX_FMT_YUVJ444P:
case PIX_FMT_YUVA420P:
w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
h_align= 16;
if(s->codec_id == CODEC_ID_MPEG2VIDEO || s->codec_id == CODEC_ID_MJPEG || s->codec_id == CODEC_ID_AMV || s->codec_id == CODEC_ID_THP)
h_align= 32; // interlaced is rounded up to 2 MBs
break;
case PIX_FMT_YUV411P:
case PIX_FMT_UYYVYY411:
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:
case PIX_FMT_BGR8:
case PIX_FMT_RGB8:
if(s->codec_id == CODEC_ID_SMC){
w_align=4;
h_align=4;
}
break;
case PIX_FMT_BGR24:
if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
w_align=4;
h_align=4;
}
break;
default:
w_align= 1;
h_align= 1;
break;
}
*width = FFALIGN(*width , w_align);
*height= FFALIGN(*height, h_align);
if(s->codec_id == CODEC_ID_H264)
*height+=2; // some of the optimized chroma MC reads one line too much
linesize_align[0] =
linesize_align[1] =
linesize_align[2] =
linesize_align[3] = STRIDE_ALIGN;
//STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
//we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
//picture size unneccessarily in some cases. The solution here is not
//pretty and better ideas are welcome!
#if HAVE_MMX
if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
s->codec_id == CODEC_ID_VP6A) {
linesize_align[0] =
linesize_align[1] =
linesize_align[2] = 16;
}
#endif
}
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
int linesize_align[4];
int align;
avcodec_align_dimensions2(s, width, height, linesize_align);
align = FFMAX(linesize_align[0], linesize_align[3]);
linesize_align[1] <<= chroma_shift;
linesize_align[2] <<= chroma_shift;
align = FFMAX3(align, linesize_align[1], linesize_align[2]);
*width=FFALIGN(*width, align);
}
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
return 0;
av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
return AVERROR(EINVAL);
}
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
int i;
int w= s->width;
int h= s->height;
InternalBuffer *buf;
int *picture_number;
if(pic->data[0]!=NULL) {
av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
return -1;
}
if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
return -1;
}
if(avcodec_check_dimensions(s,w,h))
return -1;
if(s->internal_buffer==NULL){
s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*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]).last_pic_num; //FIXME ugly hack
(*picture_number)++;
if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
for(i=0; i<4; i++){
av_freep(&buf->base[i]);
buf->data[i]= NULL;
}
}
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 size[4] = {0};
int tmpsize;
int unaligned;
AVPicture picture;
int stride_align[4];
avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
avcodec_align_dimensions2(s, &w, &h, stride_align);
if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
w+= EDGE_WIDTH*2;
h+= EDGE_WIDTH*2;
}
do {
// NOTE: do not align linesizes individually, this breaks e.g. assumptions
// that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
ff_fill_linesize(&picture, s->pix_fmt, w);
// increase alignment of w for next try (rhs gives the lowest bit set in w)
w += w & ~(w-1);
unaligned = 0;
for (i=0; i<4; i++){
unaligned |= picture.linesize[i] % stride_align[i];
}
} while (unaligned);
tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
if (tmpsize < 0)
return -1;
for (i=0; i<3 && picture.data[i+1]; i++)
size[i] = picture.data[i+1] - picture.data[i];
size[i] = tmpsize - (picture.data[i] - picture.data[0]);
buf->last_pic_num= -256*256*256*64;
memset(buf->base, 0, sizeof(buf->base));
memset(buf->data, 0, sizeof(buf->data));
for(i=0; i<4 && size[i]; i++){
const int h_shift= i==0 ? 0 : h_chroma_shift;
const int v_shift= i==0 ? 0 : v_chroma_shift;
buf->linesize[i]= picture.linesize[i];
buf->base[i]= av_malloc(size[i]+16); //FIXME 16
if(buf->base[i]==NULL) return -1;
memset(buf->base[i], 128, size[i]);
// no edge if EDGE EMU or not planar YUV
if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
buf->data[i] = buf->base[i];
else
buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
}
if(size[1] && !size[2])
ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
buf->width = s->width;
buf->height = s->height;
buf->pix_fmt= s->pix_fmt;
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++;
pic->reordered_opaque= s->reordered_opaque;
if(s->debug&FF_DEBUG_BUFFERS)
av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
return 0;
}
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
int i;
InternalBuffer *buf, *last;
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];
FFSWAP(InternalBuffer, *buf, *last);
for(i=0; i<4; i++){
pic->data[i]=NULL;
// pic->base[i]=NULL;
}
//printf("R%X\n", pic->opaque);
if(s->debug&FF_DEBUG_BUFFERS)
av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
}
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) {
pic->reordered_opaque= s->reordered_opaque;
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 */
av_picture_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 size){
int i;
for(i=0; i<count; i++){
int r= func(c, (char*)arg + i*size);
if(ret) ret[i]= r;
}
return 0;
}
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
int i;
for(i=0; i<count; i++){
int r= func(c, arg, i, 0);
if(ret) ret[i]= r;
}
return 0;
}
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
++fmt;
return fmt[0];
}
void avcodec_get_frame_defaults(AVFrame *pic){
memset(pic, 0, sizeof(AVFrame));
pic->pts= AV_NOPTS_VALUE;
pic->key_frame= 1;
}
AVFrame *avcodec_alloc_frame(void){
AVFrame *pic= av_malloc(sizeof(AVFrame));
if(pic==NULL) return NULL;
avcodec_get_frame_defaults(pic);
return pic;
}
int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
{
int ret= -1;
/* If there is a user-supplied mutex locking routine, call it. */
if (ff_lockmgr_cb) {
if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
return -1;
}
entangled_thread_counter++;
if(entangled_thread_counter != 1){
av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
goto end;
}
if(avctx->codec || !codec)
goto end;
if (codec->priv_data_size > 0) {
avctx->priv_data = av_mallocz(codec->priv_data_size);
if (!avctx->priv_data) {
ret = AVERROR(ENOMEM);
goto end;
}
} else {
avctx->priv_data = NULL;
}
if(avctx->coded_width && avctx->coded_height)
avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
else if(avctx->width && avctx->height)
avcodec_set_dimensions(avctx, avctx->width, avctx->height);
#define SANE_NB_CHANNELS 128U
if (((avctx->coded_width || avctx->coded_height)
&& avcodec_check_dimensions(avctx, avctx->coded_width, avctx->coded_height))
|| avctx->channels > SANE_NB_CHANNELS) {
ret = AVERROR(EINVAL);
goto free_and_end;
}
avctx->codec = codec;
if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
avctx->codec_id == CODEC_ID_NONE) {
avctx->codec_type = codec->type;
avctx->codec_id = codec->id;
}
if(avctx->codec_id != codec->id || avctx->codec_type != codec->type){
av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
goto free_and_end;
}
avctx->frame_number = 0;
if(avctx->codec->init){
if(avctx->codec_type == AVMEDIA_TYPE_VIDEO &&
avctx->codec->max_lowres < avctx->lowres){
av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
avctx->codec->max_lowres);
goto free_and_end;
}
ret = avctx->codec->init(avctx);
if (ret < 0) {
goto free_and_end;
}
}
ret=0;
end:
entangled_thread_counter--;
/* Release any user-supplied mutex. */
if (ff_lockmgr_cb) {
(*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
}
return ret;
free_and_end:
av_freep(&avctx->priv_data);
avctx->codec= NULL;
goto end;
}
int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
const short *samples)
{
if(buf_size < FF_MIN_BUFFER_SIZE && 0){
av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
return -1;
}
if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
avctx->frame_number++;
return ret;
}else
return 0;
}
int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
const AVFrame *pict)
{
if(buf_size < FF_MIN_BUFFER_SIZE){
av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
return -1;
}
if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
return -1;
if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
avctx->frame_number++;
emms_c(); //needed to avoid an emms_c() call before every return;
return ret;
}else
return 0;
}
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
const AVSubtitle *sub)
{
int ret;
if(sub->start_display_time) {
av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
return -1;
}
if(sub->num_rects == 0 || !sub->rects)
return -1;
ret = avctx->codec->encode(avctx, buf, buf_size, sub);
avctx->frame_number++;
return ret;
}
#if LIBAVCODEC_VERSION_MAJOR < 53
int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
int *got_picture_ptr,
const uint8_t *buf, int buf_size)
{
AVPacket avpkt;
av_init_packet(&avpkt);
avpkt.data = buf;
avpkt.size = buf_size;
// HACK for CorePNG to decode as normal PNG by default
avpkt.flags = AV_PKT_FLAG_KEY;
return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
}
#endif
int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
int *got_picture_ptr,
AVPacket *avpkt)
{
int ret;
*got_picture_ptr= 0;
if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
return -1;
if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
avpkt);
emms_c(); //needed to avoid an emms_c() call before every return;
if (*got_picture_ptr)
avctx->frame_number++;
}else
ret= 0;
return ret;
}
#if LIBAVCODEC_VERSION_MAJOR < 53
int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
int *frame_size_ptr,
const uint8_t *buf, int buf_size)
{
AVPacket avpkt;
av_init_packet(&avpkt);
avpkt.data = buf;
avpkt.size = buf_size;
return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
}
#endif
int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
int *frame_size_ptr,
AVPacket *avpkt)
{
int ret;
if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
//FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
return -1;
}
if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
*frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
return -1;
}
ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
avctx->frame_number++;
}else{
ret= 0;
*frame_size_ptr=0;
}
return ret;
}
#if LIBAVCODEC_VERSION_MAJOR < 53
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
int *got_sub_ptr,
const uint8_t *buf, int buf_size)
{
AVPacket avpkt;
av_init_packet(&avpkt);
avpkt.data = buf;
avpkt.size = buf_size;
return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
}
#endif
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
int *got_sub_ptr,
AVPacket *avpkt)
{
int ret;
*got_sub_ptr = 0;
ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
if (*got_sub_ptr)
avctx->frame_number++;
return ret;
}
void avsubtitle_free(AVSubtitle *sub)
{
int i;
for (i = 0; i < sub->num_rects; i++)
{
av_freep(&sub->rects[i]->pict.data[0]);
av_freep(&sub->rects[i]->pict.data[1]);
av_freep(&sub->rects[i]->pict.data[2]);
av_freep(&sub->rects[i]->pict.data[3]);
av_freep(&sub->rects[i]->text);
av_freep(&sub->rects[i]->ass);
av_freep(&sub->rects[i]);
}
av_freep(&sub->rects);
memset(sub, 0, sizeof(AVSubtitle));
}
av_cold int avcodec_close(AVCodecContext *avctx)
{
/* If there is a user-supplied mutex locking routine, call it. */
if (ff_lockmgr_cb) {
if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
return -1;
}
entangled_thread_counter++;
if(entangled_thread_counter != 1){
av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
entangled_thread_counter--;
return -1;
}
if (HAVE_THREADS && avctx->thread_opaque)
avcodec_thread_free(avctx);
if (avctx->codec && avctx->codec->close)
avctx->codec->close(avctx);
avcodec_default_free_buffers(avctx);
avctx->coded_frame = NULL;
av_freep(&avctx->priv_data);
if(avctx->codec && avctx->codec->encode)
av_freep(&avctx->extradata);
avctx->codec = NULL;
entangled_thread_counter--;
/* Release any user-supplied mutex. */
if (ff_lockmgr_cb) {
(*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
}
return 0;
}
AVCodec *avcodec_find_encoder(enum CodecID id)
{
AVCodec *p, *experimental=NULL;
p = first_avcodec;
while (p) {
if (p->encode != NULL && p->id == id) {
if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
experimental = p;
} else
return p;
}
p = p->next;
}
return experimental;
}
AVCodec *avcodec_find_encoder_by_name(const char *name)
{
AVCodec *p;
if (!name)
return NULL;
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;
if (!name)
return NULL;
p = first_avcodec;
while (p) {
if (p->decode != NULL && strcmp(name,p->name) == 0)
return p;
p = p->next;
}
return NULL;
}
static int get_bit_rate(AVCodecContext *ctx)
{
int bit_rate;
int bits_per_sample;
switch(ctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
case AVMEDIA_TYPE_DATA:
case AVMEDIA_TYPE_SUBTITLE:
case AVMEDIA_TYPE_ATTACHMENT:
bit_rate = ctx->bit_rate;
break;
case AVMEDIA_TYPE_AUDIO:
bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
break;
default:
bit_rate = 0;
break;
}
return bit_rate;
}
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
{
int i, len, ret = 0;
for (i = 0; i < 4; i++) {
len = snprintf(buf, buf_size,
isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
buf += len;
buf_size = buf_size > len ? buf_size - len : 0;
ret += len;
codec_tag>>=8;
}
return ret;
}
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
{
const char *codec_name;
AVCodec *p;
char buf1[32];
int bitrate;
AVRational display_aspect_ratio;
if (encode)
p = avcodec_find_encoder(enc->codec_id);
else
p = avcodec_find_decoder(enc->codec_id);
if (p) {
codec_name = p->name;
} 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 {
/* output avi tags */
char tag_buf[32];
av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
codec_name = buf1;
}
switch(enc->codec_type) {
case AVMEDIA_TYPE_VIDEO:
snprintf(buf, buf_size,
"Video: %s%s",
codec_name, enc->mb_decision ? " (hq)" : "");
if (enc->pix_fmt != PIX_FMT_NONE) {
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",
enc->width, enc->height);
if (enc->sample_aspect_ratio.num) {
av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
enc->width*enc->sample_aspect_ratio.num,
enc->height*enc->sample_aspect_ratio.den,
1024*1024);
snprintf(buf + strlen(buf), buf_size - strlen(buf),
" [PAR %d:%d DAR %d:%d]",
enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
display_aspect_ratio.num, display_aspect_ratio.den);
}
if(av_log_get_level() >= AV_LOG_DEBUG){
int g= av_gcd(enc->time_base.num, enc->time_base.den);
snprintf(buf + strlen(buf), buf_size - strlen(buf),
", %d/%d",
enc->time_base.num/g, enc->time_base.den/g);
}
}
if (encode) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
", q=%d-%d", enc->qmin, enc->qmax);
}
break;
case AVMEDIA_TYPE_AUDIO:
snprintf(buf, buf_size,
"Audio: %s",
codec_name);
if (enc->sample_rate) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
", %d Hz", enc->sample_rate);
}
av_strlcat(buf, ", ", buf_size);
avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
if (enc->sample_fmt != SAMPLE_FMT_NONE) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
}
break;
case AVMEDIA_TYPE_DATA:
snprintf(buf, buf_size, "Data: %s", codec_name);
break;
case AVMEDIA_TYPE_SUBTITLE:
snprintf(buf, buf_size, "Subtitle: %s", codec_name);
break;
case AVMEDIA_TYPE_ATTACHMENT:
snprintf(buf, buf_size, "Attachment: %s", codec_name);
break;
default:
snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
return;
}
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");
}
bitrate = get_bit_rate(enc);
if (bitrate != 0) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
", %d kb/s", bitrate / 1000);
}
}
unsigned avcodec_version( void )
{
return LIBAVCODEC_VERSION_INT;
}
const char *avcodec_configuration(void)
{
return FFMPEG_CONFIGURATION;
}
const char *avcodec_license(void)
{
#define LICENSE_PREFIX "libavcodec license: "
return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
}
void avcodec_init(void)
{
static int initialized = 0;
if (initialized != 0)
return;
initialized = 1;
dsputil_static_init();
}
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;
if (s->internal_buffer_count)
av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
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 FF_I_TYPE: return 'I';
case FF_P_TYPE: return 'P';
case FF_B_TYPE: return 'B';
case FF_S_TYPE: return 'S';
case FF_SI_TYPE:return 'i';
case FF_SP_TYPE:return 'p';
case FF_BI_TYPE:return 'b';
default: return '?';
}
}
int av_get_bits_per_sample(enum CodecID codec_id){
switch(codec_id){
case CODEC_ID_ADPCM_SBPRO_2:
return 2;
case CODEC_ID_ADPCM_SBPRO_3:
return 3;
case CODEC_ID_ADPCM_SBPRO_4:
case CODEC_ID_ADPCM_CT:
case CODEC_ID_ADPCM_IMA_WAV:
case CODEC_ID_ADPCM_MS:
case CODEC_ID_ADPCM_YAMAHA:
return 4;
case CODEC_ID_PCM_ALAW:
case CODEC_ID_PCM_MULAW:
case CODEC_ID_PCM_S8:
case CODEC_ID_PCM_U8:
case CODEC_ID_PCM_ZORK:
return 8;
case CODEC_ID_PCM_S16BE:
case CODEC_ID_PCM_S16LE:
case CODEC_ID_PCM_S16LE_PLANAR:
case CODEC_ID_PCM_U16BE:
case CODEC_ID_PCM_U16LE:
return 16;
case CODEC_ID_PCM_S24DAUD:
case CODEC_ID_PCM_S24BE:
case CODEC_ID_PCM_S24LE:
case CODEC_ID_PCM_U24BE:
case CODEC_ID_PCM_U24LE:
return 24;
case CODEC_ID_PCM_S32BE:
case CODEC_ID_PCM_S32LE:
case CODEC_ID_PCM_U32BE:
case CODEC_ID_PCM_U32LE:
case CODEC_ID_PCM_F32BE:
case CODEC_ID_PCM_F32LE:
return 32;
case CODEC_ID_PCM_F64BE:
case CODEC_ID_PCM_F64LE:
return 64;
default:
return 0;
}
}
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
switch (sample_fmt) {
case SAMPLE_FMT_U8:
return 8;
case SAMPLE_FMT_S16:
return 16;
case SAMPLE_FMT_S32:
case SAMPLE_FMT_FLT:
return 32;
case SAMPLE_FMT_DBL:
return 64;
default:
return 0;
}
}
#if !HAVE_THREADS
int avcodec_thread_init(AVCodecContext *s, int thread_count){
s->thread_count = thread_count;
return -1;
}
#endif
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
{
unsigned int n = 0;
while(v >= 0xff) {
*s++ = 0xff;
v -= 0xff;
n++;
}
*s = v;
n++;
return n;
}
#if LIBAVCODEC_VERSION_MAJOR < 53
#include "libavcore/parseutils.h"
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
{
return av_parse_video_size(width_ptr, height_ptr, str);
}
int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
{
return av_parse_video_rate(frame_rate, arg);
}
#endif
int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
int i;
for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
return i;
}
void av_log_missing_feature(void *avc, const char *feature, int want_sample)
{
av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
"version to the newest one from SVN. If the problem still "
"occurs, it means that your file has a feature which has not "
"been implemented.", feature);
if(want_sample)
av_log_ask_for_sample(avc, NULL);
else
av_log(avc, AV_LOG_WARNING, "\n");
}
void av_log_ask_for_sample(void *avc, const char *msg)
{
if (msg)
av_log(avc, AV_LOG_WARNING, "%s ", msg);
av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
"of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
"and contact the ffmpeg-devel mailing list.\n");
}
static AVHWAccel *first_hwaccel = NULL;
void av_register_hwaccel(AVHWAccel *hwaccel)
{
AVHWAccel **p = &first_hwaccel;
while (*p)
p = &(*p)->next;
*p = hwaccel;
hwaccel->next = NULL;
}
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
{
return hwaccel ? hwaccel->next : first_hwaccel;
}
AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
{
AVHWAccel *hwaccel=NULL;
while((hwaccel= av_hwaccel_next(hwaccel))){
if ( hwaccel->id == codec_id
&& hwaccel->pix_fmt == pix_fmt)
return hwaccel;
}
return NULL;
}
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
{
if (ff_lockmgr_cb) {
if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
return -1;
}
ff_lockmgr_cb = cb;
if (ff_lockmgr_cb) {
if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
return -1;
}
return 0;
}
unsigned int ff_toupper4(unsigned int x)
{
return toupper( x &0xFF)
+ (toupper((x>>8 )&0xFF)<<8 )
+ (toupper((x>>16)&0xFF)<<16)
+ (toupper((x>>24)&0xFF)<<24);
}