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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 Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* utils.
*/
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/crc.h"
#include "libavutil/mathematics.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/samplefmt.h"
#include "libavutil/dict.h"
#include "avcodec.h"
#include "dsputil.h"
#include "libavutil/opt.h"
#include "thread.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);
/* we could set this to the unmodified min_size but this is safer
* if the user lost the ptr and uses NULL now
*/
if (!ptr)
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;
}
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
{
void **p = ptr;
if (min_size > SIZE_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
av_freep(p);
*size = 0;
return;
}
av_fast_malloc(p, size, min_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (*size)
memset((uint8_t *)*p + min_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
}
/* encoder management */
static AVCodec *first_avcodec = NULL;
AVCodec *av_codec_next(const AVCodec *c)
{
if (c)
return c->next;
else
return first_avcodec;
}
static void avcodec_init(void)
{
static int initialized = 0;
if (initialized != 0)
return;
initialized = 1;
ff_dsputil_static_init();
}
int av_codec_is_encoder(const AVCodec *codec)
{
return codec && (codec->encode_sub || codec->encode2);
}
int av_codec_is_decoder(const AVCodec *codec)
{
return codec && codec->decode;
}
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->height = height;
}
#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 AV_PIX_FMT_YUV420P:
case AV_PIX_FMT_YUYV422:
case AV_PIX_FMT_UYVY422:
case AV_PIX_FMT_YUV422P:
case AV_PIX_FMT_YUV440P:
case AV_PIX_FMT_YUV444P:
case AV_PIX_FMT_GBRP:
case AV_PIX_FMT_GRAY8:
case AV_PIX_FMT_GRAY16BE:
case AV_PIX_FMT_GRAY16LE:
case AV_PIX_FMT_YUVJ420P:
case AV_PIX_FMT_YUVJ422P:
case AV_PIX_FMT_YUVJ440P:
case AV_PIX_FMT_YUVJ444P:
case AV_PIX_FMT_YUVA420P:
case AV_PIX_FMT_YUVA422P:
case AV_PIX_FMT_YUVA444P:
case AV_PIX_FMT_YUV420P9LE:
case AV_PIX_FMT_YUV420P9BE:
case AV_PIX_FMT_YUV420P10LE:
case AV_PIX_FMT_YUV420P10BE:
case AV_PIX_FMT_YUV422P9LE:
case AV_PIX_FMT_YUV422P9BE:
case AV_PIX_FMT_YUV422P10LE:
case AV_PIX_FMT_YUV422P10BE:
case AV_PIX_FMT_YUV444P9LE:
case AV_PIX_FMT_YUV444P9BE:
case AV_PIX_FMT_YUV444P10LE:
case AV_PIX_FMT_YUV444P10BE:
case AV_PIX_FMT_GBRP9LE:
case AV_PIX_FMT_GBRP9BE:
case AV_PIX_FMT_GBRP10LE:
case AV_PIX_FMT_GBRP10BE:
w_align = 16; //FIXME assume 16 pixel per macroblock
h_align = 16 * 2; // interlaced needs 2 macroblocks height
break;
case AV_PIX_FMT_YUV411P:
case AV_PIX_FMT_UYYVYY411:
w_align = 32;
h_align = 8;
break;
case AV_PIX_FMT_YUV410P:
if (s->codec_id == AV_CODEC_ID_SVQ1) {
w_align = 64;
h_align = 64;
}
case AV_PIX_FMT_RGB555:
if (s->codec_id == AV_CODEC_ID_RPZA) {
w_align = 4;
h_align = 4;
}
case AV_PIX_FMT_PAL8:
case AV_PIX_FMT_BGR8:
case AV_PIX_FMT_RGB8:
if (s->codec_id == AV_CODEC_ID_SMC) {
w_align = 4;
h_align = 4;
}
break;
case AV_PIX_FMT_BGR24:
if ((s->codec_id == AV_CODEC_ID_MSZH) ||
(s->codec_id == AV_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 == AV_CODEC_ID_H264)
// some of the optimized chroma MC reads one line too much
*height += 2;
for (i = 0; i < 4; i++)
linesize_align[i] = STRIDE_ALIGN;
}
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
int chroma_shift = desc->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);
}
int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
enum AVSampleFormat sample_fmt, const uint8_t *buf,
int buf_size, int align)
{
int ch, planar, needed_size, ret = 0;
needed_size = av_samples_get_buffer_size(NULL, nb_channels,
frame->nb_samples, sample_fmt,
align);
if (buf_size < needed_size)
return AVERROR(EINVAL);
planar = av_sample_fmt_is_planar(sample_fmt);
if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
if (!(frame->extended_data = av_mallocz(nb_channels *
sizeof(*frame->extended_data))))
return AVERROR(ENOMEM);
} else {
frame->extended_data = frame->data;
}
if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
buf, nb_channels, frame->nb_samples,
sample_fmt, align)) < 0) {
if (frame->extended_data != frame->data)
av_free(frame->extended_data);
return ret;
}
if (frame->extended_data != frame->data) {
for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
frame->data[ch] = frame->extended_data[ch];
}
return ret;
}
static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
{
AVCodecInternal *avci = avctx->internal;
InternalBuffer *buf;
int buf_size, ret;
buf_size = av_samples_get_buffer_size(NULL, avctx->channels,
frame->nb_samples, avctx->sample_fmt,
0);
if (buf_size < 0)
return AVERROR(EINVAL);
/* 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 (!buf->data[0]) {
if (!(buf->data[0] = av_mallocz(buf_size)))
return AVERROR(ENOMEM);
buf->audio_data_size = buf_size;
}
if ((ret = avcodec_fill_audio_frame(frame, avctx->channels,
avctx->sample_fmt, buf->data[0],
buf->audio_data_size, 0)))
return ret;
if (frame->extended_data == frame->data)
buf->extended_data = buf->data;
else
buf->extended_data = frame->extended_data;
memcpy(buf->data, frame->data, sizeof(frame->data));
buf->linesize[0] = frame->linesize[0];
buf->nb_channels = avctx->channels;
} else {
/* copy InternalBuffer info to the AVFrame */
frame->extended_data = buf->extended_data;
frame->linesize[0] = buf->linesize[0];
memcpy(frame->data, buf->data, sizeof(frame->data));
}
frame->type = FF_BUFFER_TYPE_INTERNAL;
if (avctx->pkt)
frame->pkt_pts = avctx->pkt->pts;
else
frame->pkt_pts = AV_NOPTS_VALUE;
frame->reordered_opaque = avctx->reordered_opaque;
frame->sample_rate = avctx->sample_rate;
frame->format = avctx->sample_fmt;
frame->channel_layout = avctx->channel_layout;
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)) {
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 AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
const int pixel_size = desc->comp[0].step_minus1 + 1;
av_pix_fmt_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])
avpriv_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++;
pic->width = buf->width;
pic->height = buf->height;
pic->format = buf->pix_fmt;
pic->sample_aspect_ratio = s->sample_aspect_ratio;
if (s->pkt)
pic->pkt_pts = s->pkt->pts;
else
pic->pkt_pts = AV_NOPTS_VALUE;
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, 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;
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);
}
assert(s->pix_fmt == pic->format);
/* 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;
}
static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
return desc->flags & PIX_FMT_HWACCEL;
}
enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
{
while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt))
++fmt;
return fmt[0];
}
void avcodec_get_frame_defaults(AVFrame *frame)
{
if (frame->extended_data != frame->data)
av_freep(&frame->extended_data);
memset(frame, 0, sizeof(AVFrame));
frame->pts = AV_NOPTS_VALUE;
frame->key_frame = 1;
frame->sample_aspect_ratio = (AVRational) {0, 1 };
frame->format = -1; /* unknown */
frame->extended_data = frame->data;
}
AVFrame *avcodec_alloc_frame(void)
{
AVFrame *frame = av_mallocz(sizeof(AVFrame));
if (frame == NULL)
return NULL;
avcodec_get_frame_defaults(frame);
return frame;
}
void avcodec_free_frame(AVFrame **frame)
{
AVFrame *f;
if (!frame || !*frame)
return;
f = *frame;
if (f->extended_data != f->data)
av_freep(&f->extended_data);
av_freep(frame);
}
int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
{
int ret = 0;
AVDictionary *tmp = NULL;
if (avcodec_is_open(avctx))
return 0;
if ((!codec && !avctx->codec)) {
av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2().\n");
return AVERROR(EINVAL);
}
if ((codec && avctx->codec && codec != avctx->codec)) {
av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
"but %s passed to avcodec_open2().\n", avctx->codec->name, codec->name);
return AVERROR(EINVAL);
}
if (!codec)
codec = avctx->codec;
if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
return AVERROR(EINVAL);
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;
}
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) {
*(const 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;
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 (av_codec_is_decoder(codec))
av_freep(&avctx->subtitle_header);
if (avctx->channels > FF_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 == AV_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 (avctx->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
ret = AVERROR_EXPERIMENTAL;
goto free_and_end;
}
if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
(!avctx->time_base.num || !avctx->time_base.den)) {
avctx->time_base.num = 1;
avctx->time_base.den = avctx->sample_rate;
}
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 (av_codec_is_encoder(avctx->codec)) {
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->channels == 1 &&
av_get_planar_sample_fmt(avctx->sample_fmt) ==
av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {
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->pix_fmts) {
for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
break;
if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE) {
av_log(avctx, AV_LOG_ERROR, "Specified pix_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);
}
}
if (avctx->codec->init && !(avctx->active_thread_type & FF_THREAD_FRAME)) {
ret = avctx->codec->init(avctx);
if (ret < 0) {
goto free_and_end;
}
}
if (av_codec_is_decoder(avctx->codec)) {
/* validate channel layout from the decoder */
if (avctx->channel_layout) {
int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
if (!avctx->channels)
avctx->channels = channels;
else if (channels != avctx->channels) {
av_log(avctx, AV_LOG_WARNING,
"channel layout does not match number of channels\n");
avctx->channel_layout = 0;
}
}
if (avctx->channels && avctx->channels < 0 ||
avctx->channels > FF_SANE_NB_CHANNELS) {
ret = AVERROR(EINVAL);
goto free_and_end;
}
}
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 ff_alloc_packet(AVPacket *avpkt, int size)
{
if (size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
return AVERROR(EINVAL);
if (avpkt->data) {
void *destruct = avpkt->destruct;
if (avpkt->size < size)
return AVERROR(EINVAL);
av_init_packet(avpkt);
avpkt->destruct = destruct;
avpkt->size = size;
return 0;
} else {
return av_new_packet(avpkt, size);
}
}
/**
* Pad last frame with silence.
*/
static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
{
AVFrame *frame = NULL;
uint8_t *buf = NULL;
int ret;
if (!(frame = avcodec_alloc_frame()))
return AVERROR(ENOMEM);
*frame = *src;
if ((ret = av_samples_get_buffer_size(&frame->linesize[0], s->channels,
s->frame_size, s->sample_fmt, 0)) < 0)
goto fail;
if (!(buf = av_malloc(ret))) {
ret = AVERROR(ENOMEM);
goto fail;
}
frame->nb_samples = s->frame_size;
if ((ret = avcodec_fill_audio_frame(frame, s->channels, s->sample_fmt,
buf, ret, 0)) < 0)
goto fail;
if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
src->nb_samples, s->channels, s->sample_fmt)) < 0)
goto fail;
if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
frame->nb_samples - src->nb_samples,
s->channels, s->sample_fmt)) < 0)
goto fail;
*dst = frame;
return 0;
fail:
if (frame->extended_data != frame->data)
av_freep(&frame->extended_data);
av_freep(&buf);
av_freep(&frame);
return ret;
}
int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
AVPacket *avpkt,
const AVFrame *frame,
int *got_packet_ptr)
{
AVFrame tmp;
AVFrame *padded_frame = NULL;
int ret;
int user_packet = !!avpkt->data;
*got_packet_ptr = 0;
if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
av_free_packet(avpkt);
av_init_packet(avpkt);
return 0;
}
/* ensure that extended_data is properly set */
if (frame && !frame->extended_data) {
if (av_sample_fmt_is_planar(avctx->sample_fmt) &&
avctx->channels > AV_NUM_DATA_POINTERS) {
av_log(avctx, AV_LOG_ERROR, "Encoding to a planar sample format, "
"with more than %d channels, but extended_data is not set.\n",
AV_NUM_DATA_POINTERS);
return AVERROR(EINVAL);
}
av_log(avctx, AV_LOG_WARNING, "extended_data is not set.\n");
tmp = *frame;
tmp.extended_data = tmp.data;
frame = &tmp;
}
/* check for valid frame size */
if (frame) {
if (avctx->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) {
if (frame->nb_samples > avctx->frame_size)
return AVERROR(EINVAL);
} else if (!(avctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
if (frame->nb_samples < avctx->frame_size &&
!avctx->internal->last_audio_frame) {
ret = pad_last_frame(avctx, &padded_frame, frame);
if (ret < 0)
return ret;
frame = padded_frame;
avctx->internal->last_audio_frame = 1;
}
if (frame->nb_samples != avctx->frame_size) {
ret = AVERROR(EINVAL);
goto end;
}
}
}
ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
if (!ret) {
if (*got_packet_ptr) {
if (!(avctx->codec->capabilities & CODEC_CAP_DELAY)) {
if (avpkt->pts == AV_NOPTS_VALUE)
avpkt->pts = frame->pts;
if (!avpkt->duration)
avpkt->duration = ff_samples_to_time_base(avctx,
frame->nb_samples);
}
avpkt->dts = avpkt->pts;
} else {
avpkt->size = 0;
}
if (!user_packet && avpkt->size) {
uint8_t *new_data = av_realloc(avpkt->data, avpkt->size);
if (new_data)
avpkt->data = new_data;
}
avctx->frame_number++;
}
if (ret < 0 || !*got_packet_ptr) {
av_free_packet(avpkt);
av_init_packet(avpkt);
goto end;
}
/* NOTE: if we add any audio encoders which output non-keyframe packets,
* this needs to be moved to the encoders, but for now we can do it
* here to simplify things */
avpkt->flags |= AV_PKT_FLAG_KEY;
end:
if (padded_frame) {
av_freep(&padded_frame->data[0]);
if (padded_frame->extended_data != padded_frame->data)
av_freep(&padded_frame->extended_data);
av_freep(&padded_frame);
}
return ret;
}
#if FF_API_OLD_ENCODE_AUDIO
int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx,
uint8_t *buf, int buf_size,
const short *samples)
{
AVPacket pkt;
AVFrame frame0 = { 0 };
AVFrame *frame;
int ret, samples_size, got_packet;
av_init_packet(&pkt);
pkt.data = buf;
pkt.size = buf_size;
if (samples) {
frame = &frame0;
avcodec_get_frame_defaults(frame);
if (avctx->frame_size) {
frame->nb_samples = avctx->frame_size;
} else {
/* if frame_size is not set, the number of samples must be
* calculated from the buffer size */
int64_t nb_samples;
if (!av_get_bits_per_sample(avctx->codec_id)) {
av_log(avctx, AV_LOG_ERROR, "avcodec_encode_audio() does not "
"support this codec\n");
return AVERROR(EINVAL);
}
nb_samples = (int64_t)buf_size * 8 /
(av_get_bits_per_sample(avctx->codec_id) *
avctx->channels);
if (nb_samples >= INT_MAX)
return AVERROR(EINVAL);
frame->nb_samples = nb_samples;
}
/* it is assumed that the samples buffer is large enough based on the
* relevant parameters */
samples_size = av_samples_get_buffer_size(NULL, avctx->channels,
frame->nb_samples,
avctx->sample_fmt, 1);
if ((ret = avcodec_fill_audio_frame(frame, avctx->channels,
avctx->sample_fmt,
(const uint8_t *)samples,
samples_size, 1)))
return ret;
/* fabricate frame pts from sample count.
* this is needed because the avcodec_encode_audio() API does not have
* a way for the user to provide pts */
frame->pts = ff_samples_to_time_base(avctx,
avctx->internal->sample_count);
avctx->internal->sample_count += frame->nb_samples;
} else {
frame = NULL;
}
got_packet = 0;
ret = avcodec_encode_audio2(avctx, &pkt, frame, &got_packet);
if (!ret && got_packet && avctx->coded_frame) {
avctx->coded_frame->pts = pkt.pts;
avctx->coded_frame->key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY);
}
/* free any side data since we cannot return it */
if (pkt.side_data_elems > 0) {
int i;
for (i = 0; i < pkt.side_data_elems; i++)
av_free(pkt.side_data[i].data);
av_freep(&pkt.side_data);
pkt.side_data_elems = 0;
}
if (frame && frame->extended_data != frame->data)
av_free(frame->extended_data);
return ret ? ret : pkt.size;
}
#endif
#if FF_API_OLD_ENCODE_VIDEO
int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
const AVFrame *pict)
{
AVPacket pkt;
int ret, got_packet = 0;
if (buf_size < FF_MIN_BUFFER_SIZE) {
av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
return -1;
}
av_init_packet(&pkt);
pkt.data = buf;
pkt.size = buf_size;
ret = avcodec_encode_video2(avctx, &pkt, pict, &got_packet);
if (!ret && got_packet && avctx->coded_frame) {
avctx->coded_frame->pts = pkt.pts;
avctx->coded_frame->key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY);
}
/* free any side data since we cannot return it */
if (pkt.side_data_elems > 0) {
int i;
for (i = 0; i < pkt.side_data_elems; i++)
av_free(pkt.side_data[i].data);
av_freep(&pkt.side_data);
pkt.side_data_elems = 0;
}
return ret ? ret : pkt.size;
}
#endif
int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
AVPacket *avpkt,
const AVFrame *frame,
int *got_packet_ptr)
{
int ret;
int user_packet = !!avpkt->data;
*got_packet_ptr = 0;
if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
av_free_packet(avpkt);
av_init_packet(avpkt);
avpkt->size = 0;
return 0;
}
if (av_image_check_size(avctx->width, avctx->height, 0, avctx))
return AVERROR(EINVAL);
av_assert0(avctx->codec->encode2);
ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
if (!ret) {
if (!*got_packet_ptr)
avpkt->size = 0;
else if (!(avctx->codec->capabilities & CODEC_CAP_DELAY))
avpkt->pts = avpkt->dts = frame->pts;
if (!user_packet && avpkt->size) {
uint8_t *new_data = av_realloc(avpkt->data, avpkt->size);
if (new_data)
avpkt->data = new_data;
}
avctx->frame_number++;
}
if (ret < 0 || !*got_packet_ptr)
av_free_packet(avpkt);
emms_c();
return ret;
}
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_sub(avctx, buf, buf_size, sub);
avctx->frame_number++;
return ret;
}
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;
avctx->pkt = avpkt;
apply_param_change(avctx, avpkt);
avcodec_get_frame_defaults(picture);
if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type & FF_THREAD_FRAME)) {
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;
picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
picture->width = avctx->width;
picture->height = avctx->height;
picture->format = avctx->pix_fmt;
}
emms_c(); //needed to avoid an emms_c() call before every return;
if (*got_picture_ptr)
avctx->frame_number++;
} else
ret = 0;
/* many decoders assign whole AVFrames, thus overwriting extended_data;
* make sure it's set correctly */
picture->extended_data = picture->data;
return ret;
}
#if FF_API_OLD_DECODE_AUDIO
int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
int *frame_size_ptr,
AVPacket *avpkt)
{
AVFrame frame = {0};
int ret, got_frame = 0;
if (avctx->get_buffer != avcodec_default_get_buffer) {
av_log(avctx, AV_LOG_ERROR, "Custom get_buffer() for use with"
"avcodec_decode_audio3() detected. Overriding with avcodec_default_get_buffer\n");
av_log(avctx, AV_LOG_ERROR, "Please port your application to "
"avcodec_decode_audio4()\n");
avctx->get_buffer = avcodec_default_get_buffer;
}
ret = avcodec_decode_audio4(avctx, &frame, &got_frame, avpkt);
if (ret >= 0 && got_frame) {
int ch, plane_size;
int planar = av_sample_fmt_is_planar(avctx->sample_fmt);
int data_size = av_samples_get_buffer_size(&plane_size, avctx->channels,
frame.nb_samples,
avctx->sample_fmt, 1);
if (*frame_size_ptr < data_size) {
av_log(avctx, AV_LOG_ERROR, "output buffer size is too small for "
"the current frame (%d < %d)\n", *frame_size_ptr, data_size);
return AVERROR(EINVAL);
}
memcpy(samples, frame.extended_data[0], plane_size);
if (planar && avctx->channels > 1) {
uint8_t *out = ((uint8_t *)samples) + plane_size;
for (ch = 1; ch < avctx->channels; ch++) {
memcpy(out, frame.extended_data[ch], plane_size);
out += plane_size;
}
}
*frame_size_ptr = data_size;
} else {
*frame_size_ptr = 0;
}
return ret;
}
#endif
int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
AVFrame *frame,
int *got_frame_ptr,
AVPacket *avpkt)
{
int planar, channels;
int ret = 0;
*got_frame_ptr = 0;
avctx->pkt = avpkt;
if (!avpkt->data && avpkt->size) {
av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
return AVERROR(EINVAL);
}
apply_param_change(avctx, avpkt);
avcodec_get_frame_defaults(frame);
if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size) {
ret = avctx->codec->decode(avctx, frame, got_frame_ptr, avpkt);
if (ret >= 0 && *got_frame_ptr) {
avctx->frame_number++;
frame->pkt_dts = avpkt->dts;
if (frame->format == AV_SAMPLE_FMT_NONE)
frame->format = avctx->sample_fmt;
}
}
/* many decoders assign whole AVFrames, thus overwriting extended_data;
* make sure it's set correctly; assume decoders that actually use
* extended_data are doing it correctly */
planar = av_sample_fmt_is_planar(frame->format);
channels = av_get_channel_layout_nb_channels(frame->channel_layout);
if (!(planar && channels > AV_NUM_DATA_POINTERS))
frame->extended_data = frame->data;
return ret;
}
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
int *got_sub_ptr,
AVPacket *avpkt)
{
int ret;
avctx->pkt = avpkt;
*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 (avcodec_is_open(avctx)) {
if (HAVE_THREADS && avctx->thread_opaque)
ff_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->internal);
}
if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
av_opt_free(avctx->priv_data);
av_opt_free(avctx);
av_freep(&avctx->priv_data);
if (av_codec_is_encoder(avctx->codec))
av_freep(&avctx->extradata);
avctx->codec = NULL;
avctx->active_thread_type = 0;
entangled_thread_counter--;
/* Release any user-supplied mutex. */
if (ff_lockmgr_cb) {
(*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
}
return 0;
}
static AVCodec *find_encdec(enum AVCodecID id, int encoder)
{
AVCodec *p, *experimental = NULL;
p = first_avcodec;
while (p) {
if ((encoder ? av_codec_is_encoder(p) : av_codec_is_decoder(p)) &&
p->id == id) {
if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
experimental = p;
} else
return p;
}
p = p->next;
}
return experimental;
}
AVCodec *avcodec_find_encoder(enum AVCodecID id)
{
return find_encdec(id, 1);
}
AVCodec *avcodec_find_encoder_by_name(const char *name)
{
AVCodec *p;
if (!name)
return NULL;
p = first_avcodec;
while (p) {
if (av_codec_is_encoder(p) && strcmp(name, p->name) == 0)
return p;
p = p->next;
}
return NULL;
}
AVCodec *avcodec_find_decoder(enum AVCodecID id)
{
return find_encdec(id, 0);
}
AVCodec *avcodec_find_decoder_by_name(const char *name)
{
AVCodec *p;
if (!name)
return NULL;
p = first_avcodec;
while (p) {
if (av_codec_is_decoder(p) && 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;
const char *profile = NULL;
const AVCodec *p;
char buf1[32];
int bitrate;
AVRational display_aspect_ratio;
if (enc->codec)
p = enc->codec;
else if (encode)
p = avcodec_find_encoder(enc->codec_id);
else
p = avcodec_find_decoder(enc->codec_id);
if (p) {
codec_name = p->name;
profile = av_get_profile_name(p, enc->profile);
} else if (enc->codec_id == AV_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 (profile)
snprintf(buf + strlen(buf), buf_size - strlen(buf),
" (%s)", profile);
if (enc->pix_fmt != AV_PIX_FMT_NONE) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
", %s",
av_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 (profile)
snprintf(buf + strlen(buf), buf_size - strlen(buf),
" (%s)", profile);
if (enc->sample_rate) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
", %d Hz", enc->sample_rate);
}
av_strlcat(buf, ", ", buf_size);
av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
", %s", av_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);
}
}
const char *av_get_profile_name(const AVCodec *codec, int profile)
{
const AVProfile *p;
if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
return NULL;
for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
if (p->profile == profile)
return p->name;
return NULL;
}
unsigned avcodec_version(void)
{
return LIBAVCODEC_VERSION_INT;
}
const char *avcodec_configuration(void)
{
return LIBAV_CONFIGURATION;
}
const char *avcodec_license(void)
{
#define LICENSE_PREFIX "libavcodec license: "
return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
}
void avcodec_flush_buffers(AVCodecContext *avctx)
{
if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
ff_thread_flush(avctx);
else if (avctx->codec->flush)
avctx->codec->flush(avctx);
}
static void video_free_buffers(AVCodecContext *s)
{
AVCodecInternal *avci = s->internal;
int i, j;
if (!avci->buffer)
return;
if (avci->buffer_count)
av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n",
avci->buffer_count);
for (i = 0; i < INTERNAL_BUFFER_SIZE; i++) {
InternalBuffer *buf = &avci->buffer[i];
for (j = 0; j < 4; j++) {
av_freep(&buf->base[j]);
buf->data[j] = NULL;
}
}
av_freep(&avci->buffer);
avci->buffer_count = 0;
}
static void audio_free_buffers(AVCodecContext *avctx)
{
AVCodecInternal *avci = avctx->internal;
InternalBuffer *buf;
if (!avci->buffer)
return;
buf = avci->buffer;
if (buf->extended_data) {
av_free(buf->extended_data[0]);
if (buf->extended_data != buf->data)
av_free(buf->extended_data);
}
av_freep(&avci->buffer);
}
void avcodec_default_free_buffers(AVCodecContext *avctx)
{
switch (avctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
video_free_buffers(avctx);
break;
case AVMEDIA_TYPE_AUDIO:
audio_free_buffers(avctx);
break;
default:
break;
}
}
int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
{
switch (codec_id) {
case AV_CODEC_ID_ADPCM_CT:
case AV_CODEC_ID_ADPCM_IMA_APC:
case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
case AV_CODEC_ID_ADPCM_IMA_WS:
case AV_CODEC_ID_ADPCM_G722:
case AV_CODEC_ID_ADPCM_YAMAHA:
return 4;
case AV_CODEC_ID_PCM_ALAW:
case AV_CODEC_ID_PCM_MULAW:
case AV_CODEC_ID_PCM_S8:
case AV_CODEC_ID_PCM_U8:
case AV_CODEC_ID_PCM_ZORK:
return 8;
case AV_CODEC_ID_PCM_S16BE:
case AV_CODEC_ID_PCM_S16LE:
case AV_CODEC_ID_PCM_S16LE_PLANAR:
case AV_CODEC_ID_PCM_U16BE:
case AV_CODEC_ID_PCM_U16LE:
return 16;
case AV_CODEC_ID_PCM_S24DAUD:
case AV_CODEC_ID_PCM_S24BE:
case AV_CODEC_ID_PCM_S24LE:
case AV_CODEC_ID_PCM_U24BE:
case AV_CODEC_ID_PCM_U24LE:
return 24;
case AV_CODEC_ID_PCM_S32BE:
case AV_CODEC_ID_PCM_S32LE:
case AV_CODEC_ID_PCM_U32BE:
case AV_CODEC_ID_PCM_U32LE:
case AV_CODEC_ID_PCM_F32BE:
case AV_CODEC_ID_PCM_F32LE:
return 32;
case AV_CODEC_ID_PCM_F64BE:
case AV_CODEC_ID_PCM_F64LE:
return 64;
default:
return 0;
}
}
int av_get_bits_per_sample(enum AVCodecID codec_id)
{
switch (codec_id) {
case AV_CODEC_ID_ADPCM_SBPRO_2:
return 2;
case AV_CODEC_ID_ADPCM_SBPRO_3:
return 3;
case AV_CODEC_ID_ADPCM_SBPRO_4:
case AV_CODEC_ID_ADPCM_IMA_WAV:
case AV_CODEC_ID_ADPCM_IMA_QT:
case AV_CODEC_ID_ADPCM_SWF:
case AV_CODEC_ID_ADPCM_MS:
return 4;
default:
return av_get_exact_bits_per_sample(codec_id);
}
}
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
{
int id, sr, ch, ba, tag, bps;
id = avctx->codec_id;
sr = avctx->sample_rate;
ch = avctx->channels;
ba = avctx->block_align;
tag = avctx->codec_tag;
bps = av_get_exact_bits_per_sample(avctx->codec_id);
/* codecs with an exact constant bits per sample */
if (bps > 0 && ch > 0 && frame_bytes > 0)
return (frame_bytes * 8) / (bps * ch);
bps = avctx->bits_per_coded_sample;
/* codecs with a fixed packet duration */
switch (id) {
case AV_CODEC_ID_ADPCM_ADX: return 32;
case AV_CODEC_ID_ADPCM_IMA_QT: return 64;
case AV_CODEC_ID_ADPCM_EA_XAS: return 128;
case AV_CODEC_ID_AMR_NB:
case AV_CODEC_ID_GSM:
case AV_CODEC_ID_QCELP:
case AV_CODEC_ID_RA_144:
case AV_CODEC_ID_RA_288: return 160;
case AV_CODEC_ID_IMC: return 256;
case AV_CODEC_ID_AMR_WB:
case AV_CODEC_ID_GSM_MS: return 320;
case AV_CODEC_ID_MP1: return 384;
case AV_CODEC_ID_ATRAC1: return 512;
case AV_CODEC_ID_ATRAC3: return 1024;
case AV_CODEC_ID_MP2:
case AV_CODEC_ID_MUSEPACK7: return 1152;
case AV_CODEC_ID_AC3: return 1536;
}
if (sr > 0) {
/* calc from sample rate */
if (id == AV_CODEC_ID_TTA)
return 256 * sr / 245;
if (ch > 0) {
/* calc from sample rate and channels */
if (id == AV_CODEC_ID_BINKAUDIO_DCT)
return (480 << (sr / 22050)) / ch;
}
}
if (ba > 0) {
/* calc from block_align */
if (id == AV_CODEC_ID_SIPR) {
switch (ba) {
case 20: return 160;
case 19: return 144;
case 29: return 288;
case 37: return 480;
}
} else if (id == AV_CODEC_ID_ILBC) {
switch (ba) {
case 38: return 160;
case 50: return 240;
}
}
}
if (frame_bytes > 0) {
/* calc from frame_bytes only */
if (id == AV_CODEC_ID_TRUESPEECH)
return 240 * (frame_bytes / 32);
if (id == AV_CODEC_ID_NELLYMOSER)
return 256 * (frame_bytes / 64);
if (bps > 0) {
/* calc from frame_bytes and bits_per_coded_sample */
if (id == AV_CODEC_ID_ADPCM_G726)
return frame_bytes * 8 / bps;
}
if (ch > 0) {
/* calc from frame_bytes and channels */
switch (id) {
case AV_CODEC_ID_ADPCM_4XM:
case AV_CODEC_ID_ADPCM_IMA_ISS:
return (frame_bytes - 4 * ch) * 2 / ch;
case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
return (frame_bytes - 4) * 2 / ch;
case AV_CODEC_ID_ADPCM_IMA_AMV:
return (frame_bytes - 8) * 2 / ch;
case AV_CODEC_ID_ADPCM_XA:
return (frame_bytes / 128) * 224 / ch;
case AV_CODEC_ID_INTERPLAY_DPCM:
return (frame_bytes - 6 - ch) / ch;
case AV_CODEC_ID_ROQ_DPCM:
return (frame_bytes - 8) / ch;
case AV_CODEC_ID_XAN_DPCM:
return (frame_bytes - 2 * ch) / ch;
case AV_CODEC_ID_MACE3:
return 3 * frame_bytes / ch;
case AV_CODEC_ID_MACE6:
return 6 * frame_bytes / ch;
case AV_CODEC_ID_PCM_LXF:
return 2 * (frame_bytes / (5 * ch));
}
if (tag) {
/* calc from frame_bytes, channels, and codec_tag */
if (id == AV_CODEC_ID_SOL_DPCM) {
if (tag == 3)
return frame_bytes / ch;
else
return frame_bytes * 2 / ch;
}
}
if (ba > 0) {
/* calc from frame_bytes, channels, and block_align */
int blocks = frame_bytes / ba;
switch (avctx->codec_id) {
case AV_CODEC_ID_ADPCM_IMA_WAV:
return blocks * (1 + (ba - 4 * ch) / (4 * ch) * 8);
case AV_CODEC_ID_ADPCM_IMA_DK3:
return blocks * (((ba - 16) * 2 / 3 * 4) / ch);
case AV_CODEC_ID_ADPCM_IMA_DK4:
return blocks * (1 + (ba - 4 * ch) * 2 / ch);
case AV_CODEC_ID_ADPCM_MS:
return blocks * (2 + (ba - 7 * ch) * 2 / ch);
}
}
if (bps > 0) {
/* calc from frame_bytes, channels, and bits_per_coded_sample */
switch (avctx->codec_id) {
case AV_CODEC_ID_PCM_DVD:
return 2 * (frame_bytes / ((bps * 2 / 8) * ch));
case AV_CODEC_ID_PCM_BLURAY:
return frame_bytes / ((FFALIGN(ch, 2) * bps) / 8);
case AV_CODEC_ID_S302M:
return 2 * (frame_bytes / ((bps + 4) / 4)) / ch;
}
}
}
}
return 0;
}
#if !HAVE_THREADS
int ff_thread_init(AVCodecContext *s)
{
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;
}
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 is not implemented. Update your Libav "
"version to the newest one from Git. If the problem still "
"occurs, it means that your file has a feature which has not "
"been implemented.\n", feature);
if(want_sample)
av_log_ask_for_sample(avc, NULL);
}
void av_log_ask_for_sample(void *avc, const char *msg, ...)
{
va_list argument_list;
va_start(argument_list, msg);
if (msg)
av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
"of this file to ftp://upload.libav.org/incoming/ "
"and contact the libav-devel mailing list.\n");
va_end(argument_list);
}
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 AVCodecID codec_id, enum AVPixelFormat 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;
if (ff_lockmgr_cb(&avformat_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;
if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_CREATE))
return -1;
}
return 0;
}
int avpriv_lock_avformat(void)
{
if (ff_lockmgr_cb) {
if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
return -1;
}
return 0;
}
int avpriv_unlock_avformat(void)
{
if (ff_lockmgr_cb) {
if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
return -1;
}
return 0;
}
unsigned int avpriv_toupper4(unsigned int x)
{
return toupper(x & 0xFF)
+ (toupper((x >> 8) & 0xFF) << 8)
+ (toupper((x >> 16) & 0xFF) << 16)
+ (toupper((x >> 24) & 0xFF) << 24);
}
#if !HAVE_THREADS
int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
{
f->owner = avctx;
return avctx->get_buffer(avctx, f);
}
void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
{
f->owner->release_buffer(f->owner, f);
}
void ff_thread_finish_setup(AVCodecContext *avctx)
{
}
void ff_thread_report_progress(AVFrame *f, int progress, int field)
{
}
void ff_thread_await_progress(AVFrame *f, int progress, int field)
{
}
#endif
enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
{
if (codec_id <= AV_CODEC_ID_NONE)
return AVMEDIA_TYPE_UNKNOWN;
else if (codec_id < AV_CODEC_ID_FIRST_AUDIO)
return AVMEDIA_TYPE_VIDEO;
else if (codec_id < AV_CODEC_ID_FIRST_SUBTITLE)
return AVMEDIA_TYPE_AUDIO;
else if (codec_id < AV_CODEC_ID_FIRST_UNKNOWN)
return AVMEDIA_TYPE_SUBTITLE;
return AVMEDIA_TYPE_UNKNOWN;
}
int avcodec_is_open(AVCodecContext *s)
{
return !!s->internal;
}