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utils.c
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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/crc.h"
#include "libavutil/mathematics.h"
#include "libavutil/pixdesc.h"
#include "libavutil/audioconvert.h"
#include "libavutil/imgutils.h"
#include "libavutil/samplefmt.h"
#include "libavutil/dict.h"
#include "libavutil/avassert.h"
#include "avcodec.h"
#include "dsputil.h"
#include "libavutil/opt.h"
#include "imgconvert.h"
#include "thread.h"
#include "audioconvert.h"
#include "internal.h"
#include "bytestream.h"
#include <stdlib.h>
#include <stdarg.h>
#include <limits.h>
#include <float.h>
static int volatile entangled_thread_counter=0;
static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
static void *codec_mutex;
static void *avformat_mutex;
void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
{
if(min_size < *size)
return ptr;
min_size= FFMAX(17*min_size/16 + 32, min_size);
ptr= av_realloc(ptr, min_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
min_size= 0;
*size= min_size;
return ptr;
}
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
{
void **p = ptr;
if (min_size < *size)
return;
min_size= FFMAX(17*min_size/16 + 32, min_size);
av_free(*p);
*p = av_malloc(min_size);
if (!*p) min_size = 0;
*size= min_size;
}
/* encoder management */
static AVCodec *first_avcodec = NULL;
AVCodec *av_codec_next(AVCodec *c){
if(c) return c->next;
else return first_avcodec;
}
#if !FF_API_AVCODEC_INIT
static
#endif
void avcodec_init(void)
{
static int initialized = 0;
if (initialized != 0)
return;
initialized = 1;
dsputil_static_init();
}
void avcodec_register(AVCodec *codec)
{
AVCodec **p;
avcodec_init();
p = &first_avcodec;
while (*p != NULL) p = &(*p)->next;
*p = codec;
codec->next = NULL;
if (codec->init_static_data)
codec->init_static_data(codec);
}
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);
}
#define INTERNAL_BUFFER_SIZE (32+1)
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
int linesize_align[AV_NUM_DATA_POINTERS])
{
int i;
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_GBRP:
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:
case PIX_FMT_YUV420P9LE:
case PIX_FMT_YUV420P9BE:
case PIX_FMT_YUV420P10LE:
case PIX_FMT_YUV420P10BE:
case PIX_FMT_YUV422P9LE:
case PIX_FMT_YUV422P9BE:
case PIX_FMT_YUV422P10LE:
case PIX_FMT_YUV422P10BE:
case PIX_FMT_YUV444P9LE:
case PIX_FMT_YUV444P9BE:
case PIX_FMT_YUV444P10LE:
case PIX_FMT_YUV444P10BE:
case PIX_FMT_GBRP9LE:
case PIX_FMT_GBRP9BE:
case PIX_FMT_GBRP10LE:
case PIX_FMT_GBRP10BE:
w_align = 16; //FIXME assume 16 pixel per macroblock
h_align = 16 * 2; // interlaced needs 2 macroblocks height
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;
}
if(s->codec_id == CODEC_ID_IFF_ILBM || s->codec_id == CODEC_ID_IFF_BYTERUN1){
w_align= FFMAX(w_align, 8);
}
*width = FFALIGN(*width , w_align);
*height= FFALIGN(*height, h_align);
if(s->codec_id == CODEC_ID_H264 || s->lowres)
*height+=2; // some of the optimized chroma MC reads one line too much
// which is also done in mpeg decoders with lowres > 0
for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
linesize_align[i] = 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 || s->codec_id == CODEC_ID_DIRAC) {
for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
linesize_align[i] = 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[AV_NUM_DATA_POINTERS];
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);
}
void ff_init_buffer_info(AVCodecContext *s, AVFrame *pic)
{
if (s->pkt) {
pic->pkt_pts = s->pkt->pts;
pic->pkt_pos = s->pkt->pos;
} else {
pic->pkt_pts = AV_NOPTS_VALUE;
pic->pkt_pos = -1;
}
pic->reordered_opaque= s->reordered_opaque;
pic->sample_aspect_ratio = s->sample_aspect_ratio;
pic->width = s->width;
pic->height = s->height;
pic->format = s->pix_fmt;
}
static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
{
AVCodecInternal *avci = avctx->internal;
InternalBuffer *buf;
int buf_size, ret, i, needs_extended_data;
buf_size = av_samples_get_buffer_size(NULL, avctx->channels,
frame->nb_samples, avctx->sample_fmt,
32);
if (buf_size < 0)
return AVERROR(EINVAL);
needs_extended_data = av_sample_fmt_is_planar(avctx->sample_fmt) &&
avctx->channels > AV_NUM_DATA_POINTERS;
/* allocate InternalBuffer if needed */
if (!avci->buffer) {
avci->buffer = av_mallocz(sizeof(InternalBuffer));
if (!avci->buffer)
return AVERROR(ENOMEM);
}
buf = avci->buffer;
/* if there is a previously-used internal buffer, check its size and
channel count to see if we can reuse it */
if (buf->extended_data) {
/* if current buffer is too small, free it */
if (buf->extended_data[0] && buf_size > buf->audio_data_size) {
av_free(buf->extended_data[0]);
if (buf->extended_data != buf->data)
av_free(&buf->extended_data);
buf->extended_data = NULL;
buf->data[0] = NULL;
}
/* if number of channels has changed, reset and/or free extended data
pointers but leave data buffer in buf->data[0] for reuse */
if (buf->nb_channels != avctx->channels) {
if (buf->extended_data != buf->data)
av_free(buf->extended_data);
buf->extended_data = NULL;
}
}
/* if there is no previous buffer or the previous buffer cannot be used
as-is, allocate a new buffer and/or rearrange the channel pointers */
if (!buf->extended_data) {
/* if the channel pointers will fit, just set extended_data to data,
otherwise allocate the extended_data channel pointers */
if (needs_extended_data) {
buf->extended_data = av_mallocz(avctx->channels *
sizeof(*buf->extended_data));
if (!buf->extended_data)
return AVERROR(ENOMEM);
} else {
buf->extended_data = buf->data;
}
/* if there is a previous buffer and it is large enough, reuse it and
just fill-in new channel pointers and linesize, otherwise allocate
a new buffer */
if (buf->extended_data[0]) {
ret = av_samples_fill_arrays(buf->extended_data, &buf->linesize[0],
buf->extended_data[0], avctx->channels,
frame->nb_samples, avctx->sample_fmt,
32);
} else {
ret = av_samples_alloc(buf->extended_data, &buf->linesize[0],
avctx->channels, frame->nb_samples,
avctx->sample_fmt, 32);
}
if (ret)
return ret;
/* if data was not used for extended_data, we need to copy as many of
the extended_data channel pointers as will fit */
if (needs_extended_data) {
for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
buf->data[i] = buf->extended_data[i];
}
buf->audio_data_size = buf_size;
buf->nb_channels = avctx->channels;
}
/* copy InternalBuffer info to the AVFrame */
frame->type = FF_BUFFER_TYPE_INTERNAL;
frame->extended_data = buf->extended_data;
frame->linesize[0] = buf->linesize[0];
memcpy(frame->data, buf->data, sizeof(frame->data));
if (avctx->pkt) {
frame->pkt_pts = avctx->pkt->pts;
frame->pkt_pos = avctx->pkt->pos;
} else {
frame->pkt_pts = AV_NOPTS_VALUE;
frame->pkt_pos = -1;
}
frame->reordered_opaque = avctx->reordered_opaque;
if (avctx->debug & FF_DEBUG_BUFFERS)
av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p, "
"internal audio buffer used\n", frame);
return 0;
}
static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
{
int i;
int w= s->width;
int h= s->height;
InternalBuffer *buf;
AVCodecInternal *avci = s->internal;
if(pic->data[0]!=NULL) {
av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
return -1;
}
if(avci->buffer_count >= INTERNAL_BUFFER_SIZE) {
av_log(s, AV_LOG_ERROR, "buffer_count overflow (missing release_buffer?)\n");
return -1;
}
if(av_image_check_size(w, h, 0, s))
return -1;
if (!avci->buffer) {
avci->buffer = av_mallocz((INTERNAL_BUFFER_SIZE+1) *
sizeof(InternalBuffer));
}
buf = &avci->buffer[avci->buffer_count];
if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
if(s->active_thread_type&FF_THREAD_FRAME) {
av_log_missing_feature(s, "Width/height changing with frame threads is", 0);
return -1;
}
for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
av_freep(&buf->base[i]);
buf->data[i]= NULL;
}
}
if (!buf->base[0]) {
int h_chroma_shift, v_chroma_shift;
int size[4] = {0};
int tmpsize;
int unaligned;
AVPicture picture;
int stride_align[AV_NUM_DATA_POINTERS];
const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
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
av_image_fill_linesizes(picture.linesize, 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 = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
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]);
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) + (pixel_size*EDGE_WIDTH>>h_shift), stride_align[i]);
}
for (; i < AV_NUM_DATA_POINTERS; i++) {
buf->base[i] = buf->data[i] = NULL;
buf->linesize[i] = 0;
}
if(size[1] && !size[2])
ff_set_systematic_pal2((uint32_t*)buf->data[1], s->pix_fmt);
buf->width = s->width;
buf->height = s->height;
buf->pix_fmt= s->pix_fmt;
}
pic->type= FF_BUFFER_TYPE_INTERNAL;
for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
pic->base[i]= buf->base[i];
pic->data[i]= buf->data[i];
pic->linesize[i]= buf->linesize[i];
}
pic->extended_data = pic->data;
avci->buffer_count++;
if (s->pkt) {
pic->pkt_pts = s->pkt->pts;
pic->pkt_pos = s->pkt->pos;
} else {
pic->pkt_pts = AV_NOPTS_VALUE;
pic->pkt_pos = -1;
}
pic->reordered_opaque= s->reordered_opaque;
pic->sample_aspect_ratio = s->sample_aspect_ratio;
pic->width = s->width;
pic->height = s->height;
pic->format = s->pix_fmt;
if(s->debug&FF_DEBUG_BUFFERS)
av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d "
"buffers used\n", pic, avci->buffer_count);
return 0;
}
int avcodec_default_get_buffer(AVCodecContext *avctx, AVFrame *frame)
{
switch (avctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
return video_get_buffer(avctx, frame);
case AVMEDIA_TYPE_AUDIO:
return audio_get_buffer(avctx, frame);
default:
return -1;
}
}
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
int i;
InternalBuffer *buf, *last;
AVCodecInternal *avci = s->internal;
assert(s->codec_type == AVMEDIA_TYPE_VIDEO);
assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
assert(avci->buffer_count);
if (avci->buffer) {
buf = NULL; /* avoids warning */
for (i = 0; i < avci->buffer_count; i++) { //just 3-5 checks so is not worth to optimize
buf = &avci->buffer[i];
if (buf->data[0] == pic->data[0])
break;
}
assert(i < avci->buffer_count);
avci->buffer_count--;
last = &avci->buffer[avci->buffer_count];
if (buf != last)
FFSWAP(InternalBuffer, *buf, *last);
}
for (i = 0; i < AV_NUM_DATA_POINTERS; 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, avci->buffer_count);
}
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
AVFrame temp_pic;
int i;
assert(s->codec_type == AVMEDIA_TYPE_VIDEO);
/* 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) {
if(s->pkt) pic->pkt_pts= s->pkt->pts;
else pic->pkt_pts= AV_NOPTS_VALUE;
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 < AV_NUM_DATA_POINTERS; 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 = pic->pkt_dts = pic->pkt_pts = pic->best_effort_timestamp = AV_NOPTS_VALUE;
pic->pkt_pos = -1;
pic->key_frame= 1;
pic->sample_aspect_ratio = (AVRational){0, 1};
pic->format = -1; /* unknown */
}
AVFrame *avcodec_alloc_frame(void){
AVFrame *pic= av_malloc(sizeof(AVFrame));
if(pic==NULL) return NULL;
avcodec_get_frame_defaults(pic);
return pic;
}
static void avcodec_get_subtitle_defaults(AVSubtitle *sub)
{
memset(sub, 0, sizeof(*sub));
sub->pts = AV_NOPTS_VALUE;
}
#if FF_API_AVCODEC_OPEN
int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
{
return avcodec_open2(avctx, codec, NULL);
}
#endif
int attribute_align_arg avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options)
{
int ret = 0;
AVDictionary *tmp = NULL;
if (options)
av_dict_copy(&tmp, *options, 0);
/* 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");
ret = -1;
goto end;
}
if(avctx->codec || !codec) {
ret = AVERROR(EINVAL);
goto end;
}
avctx->internal = av_mallocz(sizeof(AVCodecInternal));
if (!avctx->internal) {
ret = AVERROR(ENOMEM);
goto end;
}
if (codec->priv_data_size > 0) {
if(!avctx->priv_data){
avctx->priv_data = av_mallocz(codec->priv_data_size);
if (!avctx->priv_data) {
ret = AVERROR(ENOMEM);
goto end;
}
if (codec->priv_class) {
*(AVClass**)avctx->priv_data= codec->priv_class;
av_opt_set_defaults(avctx->priv_data);
}
}
if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
goto free_and_end;
} else {
avctx->priv_data = NULL;
}
if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
goto free_and_end;
//We only call avcodec_set_dimensions() for non h264 codecs so as not to overwrite previously setup dimensions
if(!( avctx->coded_width && avctx->coded_height && avctx->width && avctx->height && avctx->codec_id == CODEC_ID_H264)){
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);
}
if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
&& ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
|| av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) {
av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
avcodec_set_dimensions(avctx, 0, 0);
}
/* if the decoder init function was already called previously,
free the already allocated subtitle_header before overwriting it */
if (codec->decode)
av_freep(&avctx->subtitle_header);
#define SANE_NB_CHANNELS 128U
if (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
&& avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
ret = AVERROR(EINVAL);
goto free_and_end;
}
avctx->frame_number = 0;
#if FF_API_ER
av_log(avctx, AV_LOG_DEBUG, "err{or,}_recognition separate: %d; %X\n",
avctx->error_recognition, avctx->err_recognition);
switch(avctx->error_recognition){
case FF_ER_EXPLODE : avctx->err_recognition |= AV_EF_EXPLODE | AV_EF_COMPLIANT | AV_EF_CAREFUL;
break;
case FF_ER_VERY_AGGRESSIVE:
case FF_ER_AGGRESSIVE : avctx->err_recognition |= AV_EF_AGGRESSIVE;
case FF_ER_COMPLIANT : avctx->err_recognition |= AV_EF_COMPLIANT;
case FF_ER_CAREFUL : avctx->err_recognition |= AV_EF_CAREFUL;
}
av_log(avctx, AV_LOG_DEBUG, "err{or,}_recognition combined: %d; %X\n",
avctx->error_recognition, avctx->err_recognition);
#endif
if (!HAVE_THREADS)
av_log(avctx, AV_LOG_WARNING, "Warning: not compiled with thread support, using thread emulation\n");
if (HAVE_THREADS && !avctx->thread_opaque) {
ret = ff_thread_init(avctx);
if (ret < 0) {
goto free_and_end;
}
}
if (!HAVE_THREADS && !(codec->capabilities & CODEC_CAP_AUTO_THREADS))
avctx->thread_count = 1;
if (avctx->codec->max_lowres < avctx->lowres || avctx->lowres < 0) {
av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
avctx->codec->max_lowres);
ret = AVERROR(EINVAL);
goto free_and_end;
}
if (avctx->codec->encode) {
int i;
if (avctx->codec->sample_fmts) {
for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++)
if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
break;
if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
ret = AVERROR(EINVAL);
goto free_and_end;
}
}
if (avctx->codec->supported_samplerates) {
for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
break;
if (avctx->codec->supported_samplerates[i] == 0) {
av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");
ret = AVERROR(EINVAL);
goto free_and_end;
}
}
if (avctx->codec->channel_layouts) {
if (!avctx->channel_layout) {
av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");
} else {
for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
if (avctx->channel_layout == avctx->codec->channel_layouts[i])
break;
if (avctx->codec->channel_layouts[i] == 0) {
av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");
ret = AVERROR(EINVAL);
goto free_and_end;
}
}
}
if (avctx->channel_layout && avctx->channels) {
if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) {
av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");
ret = AVERROR(EINVAL);
goto free_and_end;
}
} else if (avctx->channel_layout) {
avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
}
}
avctx->pts_correction_num_faulty_pts =
avctx->pts_correction_num_faulty_dts = 0;
avctx->pts_correction_last_pts =
avctx->pts_correction_last_dts = INT64_MIN;
if(avctx->codec->init && !(avctx->active_thread_type&FF_THREAD_FRAME)){
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);
}
if (options) {
av_dict_free(options);
*options = tmp;
}
return ret;
free_and_end:
av_dict_free(&tmp);
av_freep(&avctx->priv_data);
av_freep(&avctx->internal);
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(av_image_check_size(avctx->width, avctx->height, 0, avctx))
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;
}
ret = avctx->codec->encode(avctx, buf, buf_size, sub);
avctx->frame_number++;
return ret;
}
/**
* Attempt to guess proper monotonic timestamps for decoded video frames
* which might have incorrect times. Input timestamps may wrap around, in
* which case the output will as well.
*
* @param pts the pts field of the decoded AVPacket, as passed through
* AVFrame.pkt_pts
* @param dts the dts field of the decoded AVPacket
* @return one of the input values, may be AV_NOPTS_VALUE
*/
static int64_t guess_correct_pts(AVCodecContext *ctx,
int64_t reordered_pts, int64_t dts)
{
int64_t pts = AV_NOPTS_VALUE;
if (dts != AV_NOPTS_VALUE) {
ctx->pts_correction_num_faulty_dts += dts <= ctx->pts_correction_last_dts;
ctx->pts_correction_last_dts = dts;
}
if (reordered_pts != AV_NOPTS_VALUE) {
ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts;
ctx->pts_correction_last_pts = reordered_pts;
}
if ((ctx->pts_correction_num_faulty_pts<=ctx->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE)
&& reordered_pts != AV_NOPTS_VALUE)
pts = reordered_pts;
else
pts = dts;
return pts;
}
static void apply_param_change(AVCodecContext *avctx, AVPacket *avpkt)
{
int size = 0;
const uint8_t *data;
uint32_t flags;
if (!(avctx->codec->capabilities & CODEC_CAP_PARAM_CHANGE))
return;
data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
if (!data || size < 4)
return;
flags = bytestream_get_le32(&data);
size -= 4;
if (size < 4) /* Required for any of the changes */
return;
if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
avctx->channels = bytestream_get_le32(&data);
size -= 4;
}
if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
if (size < 8)
return;
avctx->channel_layout = bytestream_get_le64(&data);
size -= 8;
}
if (size < 4)
return;
if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
avctx->sample_rate = bytestream_get_le32(&data);
size -= 4;
}
if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
if (size < 8)
return;
avctx->width = bytestream_get_le32(&data);
avctx->height = bytestream_get_le32(&data);
avcodec_set_dimensions(avctx, avctx->width, avctx->height);
size -= 8;
}
}
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) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
return -1;
if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type&FF_THREAD_FRAME)){
av_packet_split_side_data(avpkt);
apply_param_change(avctx, avpkt);
avctx->pkt = avpkt;
if (HAVE_THREADS && avctx->active_thread_type&FF_THREAD_FRAME)
ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
avpkt);
else {
ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
avpkt);
picture->pkt_dts= avpkt->dts;