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ffmpeg.c
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/*
*
* ffmpeg.c
*
* This software is distributed under the GNU Public License version 2
* See also the file 'COPYING'.
*
* The contents of this file has been derived from output_example.c
* and apiexample.c from the FFmpeg distribution.
*
*/
#ifdef HAVE_FFMPEG
#include "ffmpeg.h"
#include "motion.h"
#if LIBAVCODEC_BUILD > 4680
/*
* FFmpeg after build 4680 doesn't have support for mpeg1 videos with
* non-standard framerates. Previous builds contained a broken hack
* that padded with B frames to obtain the correct framerate.
*/
# define FFMPEG_NO_NONSTD_MPEG1
# ifdef __GNUC__
/* #warning is a non-standard gcc extension */
# warning **************************************************
# warning Your version of FFmpeg is newer than version 0.4.8
# warning Newer versions of ffmpeg do not support MPEG1 with
# warning non-standard framerate. MPEG1 will be disabled for
# warning normal video output. You can still use mpeg4 and
# warning and mpeg4ms which are both better in terms of size
# warning and quality. MPEG1 is always used for timelapse.
# warning Please read the Motion Guide for more information.
# warning Note that this is not an error message!
# warning **************************************************
# endif /* __GNUC__ */
#endif /* LIBAVCODEC_BUILD > 4680 */
#if defined LIBAVFORMAT_VERSION_MAJOR && defined LIBAVFORMAT_VERSION_MINOR
# if LIBAVFORMAT_VERSION_MAJOR < 53 && LIBAVFORMAT_VERSION_MINOR < 45
# define GUESS_NO_DEPRECATED
# endif
#endif
#if LIBAVFORMAT_BUILD >= 4616
/*
* The API for av_write_frame changed with FFmpeg version 0.4.9pre1.
* It now uses an AVPacket struct instead of direct parameters to the
* function.
*/
# define FFMPEG_AVWRITEFRAME_NEWAPI
#endif /* LIBAVFORMAT_BUILD >= 4616 */
#if LIBAVFORMAT_BUILD >= 4629
/*
* In this build/header version, the codec member of struct AVStream
* was changed to a pointer so changes to AVCodecContext shouldn't
* break binary compatibility with AVStream.
*/
# define AVSTREAM_CODEC_PTR(avs_ptr) (avs_ptr->codec)
#else
# define AVSTREAM_CODEC_PTR(avs_ptr) (&avs_ptr->codec)
#endif /* LIBAVFORMAT_BUILD >= 4629 */
// AV_VERSION_INT(a, b, c) (a<<16 | b<<8 | c)
// (54*2^16 | 6*2^8 | 100)
#if LIBAVFORMAT_BUILD >= 3540580
#define FF_API_NEW_AVIO
#define URL_RDONLY AVIO_FLAG_READ /**< read-only */
#define URL_WRONLY AVIO_FLAG_WRITE /**< write-only */
#define URL_RDWR AVIO_FLAG_READ_WRITE /**< read-write pseudo flag */
#endif
/*
* Name of custom file protocol for appending to existing files instead
* of truncating.
*/
#define APPEND_PROTO "appfile"
/* Some forward-declarations. */
int ffmpeg_put_frame(struct ffmpeg *, AVFrame *);
void ffmpeg_cleanups(struct ffmpeg *);
AVFrame *ffmpeg_prepare_frame(struct ffmpeg *, unsigned char *,
unsigned char *, unsigned char *);
/* This is the trailer used to end mpeg1 videos. */
static unsigned char mpeg1_trailer[] = {0x00, 0x00, 0x01, 0xb7};
// FFMPEG API changed in 0.8
#if defined FF_API_NEW_AVIO
// TODO
#else
/**
* file_open_append
* Append version of the file open function used in libavformat when opening
* an ordinary file. The original file open function truncates an existing
* file, but this version appends to it instead.
*
* Returns 0 on success and AVERROR(ENOENT) on error.
*
*/
static int file_open_append(URLContext *h, const char *filename, int flags)
{
const char *colon;
const char *mode;
FILE *fh;
size_t bufsize = 0;
/* Skip past the protocol part of filename. */
colon = strchr(filename, ':');
if (colon)
filename = colon + 1;
if (flags & URL_RDWR) {
mode = "ab+";
bufsize = BUFSIZE_1MEG;
} else if (flags & URL_WRONLY) {
mode = "ab";
bufsize = BUFSIZE_1MEG;
} else {
mode = "rb";
}
fh = myfopen(filename, mode, bufsize);
if (fh == NULL)
return AVERROR(ENOENT);
h->priv_data = (void *)fh;
return 0;
}
/*
* URLProtocol entry for the append file protocol, which we use for mpeg1 videos
* in order to get append behavior with url_fopen.
*
* Libavformat uses protocols for achieving flexibility when handling files
* and other resources. A call to url_fopen will eventually be redirected to
* a protocol-specific open function.
*
* The remaining functions (for writing, seeking etc.) are set in ffmpeg_init.
*/
URLProtocol mpeg1_file_protocol = {
.name = APPEND_PROTO,
.url_open = file_open_append
};
#ifdef HAVE_FFMPEG_NEW
/* file_procotol has been removed from avio.h */
#ifdef FFMPEG_NEW_INCLUDES
#include <libavutil/avstring.h>
#else
#include "avstring.h"
#endif
/**
* file_open
*
*/
static int file_open(URLContext *h, const char *filename, int flags)
{
const char *mode;
FILE *fh;
size_t bufsize = 0;
av_strstart(filename, "file:", &filename);
if (flags & URL_RDWR) {
mode = "wb+";
bufsize = BUFSIZE_1MEG;
} else if (flags & URL_WRONLY) {
mode = "wb";
bufsize = BUFSIZE_1MEG;
} else {
mode = "rb";
}
fh = myfopen(filename, mode, bufsize);
if (fh == NULL)
return AVERROR(ENOENT);
h->priv_data = (void *)fh;
return 0;
}
/**
* file_read
*/
static int file_read(URLContext *h, unsigned char *buf, int size)
{
FILE *fh = (FILE *)h->priv_data;
return fread(buf, 1, size, fh);
}
/**
* file_write
*/
static int file_write(URLContext *h, unsigned char *buf, int size)
{
FILE *fh = (FILE *)h->priv_data;
return fwrite(buf, 1, size, fh);
}
/**
* file_seek
*/
static int64_t file_seek(URLContext *h, int64_t pos, int whence)
{
FILE *fh = (FILE *)h->priv_data;
if (fseek(fh, pos, whence))
return -1;
return ftell(fh);
}
/**
* file_close
*/
static int file_close(URLContext *h)
{
FILE *fh = (FILE *)h->priv_data;
return myfclose(fh);
}
URLProtocol file_protocol = {
"file",
file_open,
file_read,
file_write,
file_seek,
file_close,
#if LIBAVFORMAT_BUILD >= (52<<16 | 31<<8)
NULL,
NULL,
NULL,
#endif
};
#endif // HAVE_FFMPEG_NEW
#endif // FF_API_NEW_AVIO
/**
* mpeg1_write_trailer
* We set AVOutputFormat->write_trailer to this function for mpeg1. That way,
* the mpeg1 video gets a proper trailer when it is closed.
*
* Returns 0
*
*/
static int mpeg1_write_trailer(AVFormatContext *s)
{
#if defined FF_API_NEW_AVIO
avio_write(s->pb, mpeg1_trailer, 4);
avio_flush(s->pb);
#elif LIBAVFORMAT_BUILD >= (52<<16)
put_buffer(s->pb, mpeg1_trailer, 4);
put_flush_packet(s->pb);
#else
put_buffer(&s->pb, mpeg1_trailer, 4);
put_flush_packet(&s->pb);
#endif /* FF_API_NEW_AVIO -- LIBAVFORMAT_BUILD >= (52<<16) */
return 0; /* success */
}
/**
* ffmpeg_init
* Initializes for libavformat.
*
* Returns
* Function returns nothing.
*/
void ffmpeg_init()
{
MOTION_LOG(NTC, TYPE_ENCODER, NO_ERRNO, "%s: ffmpeg LIBAVCODEC_BUILD %d"
" LIBAVFORMAT_BUILD %d", LIBAVCODEC_BUILD,
LIBAVFORMAT_BUILD);
av_register_all();
#if LIBAVCODEC_BUILD > 4680
av_log_set_callback((void *)ffmpeg_avcodec_log);
av_log_set_level(AV_LOG_ERROR);
#endif
#if defined FF_API_NEW_AVIO
#else
/*
* Copy the functions to use for the append file protocol from the standard
* file protocol.
*/
mpeg1_file_protocol.url_read = file_protocol.url_read;
mpeg1_file_protocol.url_write = file_protocol.url_write;
mpeg1_file_protocol.url_seek = file_protocol.url_seek;
mpeg1_file_protocol.url_close = file_protocol.url_close;
/* Register the append file protocol. */
#ifdef have_av_register_protocol2
av_register_protocol2(&mpeg1_file_protocol, sizeof(mpeg1_file_protocol));
#elif defined have_av_register_protocol
av_register_protocol(&mpeg1_file_protocol);
#else
# warning av_register_protocolXXX missing
#endif
#endif // FF_API_NEW_AVIO
}
/**
* get_oformat
* Obtains the output format used for the specified codec. For mpeg4 codecs,
* the format is avi; for mpeg1 codec, the format is mpeg. The filename has
* to be passed, because it gets the appropriate extension appended onto it.
*
* Returns
* AVOutputFormat pointer or NULL if any error happens.
*/
static AVOutputFormat *get_oformat(const char *codec, char *filename)
{
const char *ext;
AVOutputFormat *of = NULL;
/*
* Here, we use guess_format to automatically setup the codec information.
* If we are using msmpeg4, manually set that codec here.
* We also dynamically add the file extension to the filename here. This was
* done to support both mpeg1 and mpeg4 codecs since they have different extensions.
*/
if ((strcmp(codec, TIMELAPSE_CODEC) == 0)
#ifndef FFMPEG_NO_NONSTD_MPEG1
|| (strcmp(codec, "mpeg1") == 0)
#endif
) {
ext = ".mpg";
/*
* We use "mpeg1video" for raw mpeg1 format. Using "mpeg" would
* result in a muxed output file, which isn't appropriate here.
*/
#ifdef GUESS_NO_DEPRECATED
of = guess_format("mpeg1video", NULL, NULL);
#else
of = av_guess_format("mpeg1video", NULL, NULL);
#endif
/* But we want the trailer to be correctly written. */
if (of)
of->write_trailer = mpeg1_write_trailer;
#ifdef FFMPEG_NO_NONSTD_MPEG1
} else if (strcmp(codec, "mpeg1") == 0) {
MOTION_LOG(WRN, TYPE_ENCODER, NO_ERRNO, "%s: *** mpeg1 support for normal"
" videos has been disabled ***");
return NULL;
#endif
} else if (strcmp(codec, "mpeg4") == 0) {
ext = ".avi";
#ifdef GUESS_NO_DEPRECATED
of = guess_format("mpeg1video", NULL, NULL);
#else
of = av_guess_format("avi", NULL, NULL);
#endif
} else if (strcmp(codec, "msmpeg4") == 0) {
ext = ".avi";
#ifdef GUESS_NO_DEPRECATED
of = guess_format("mpeg1video", NULL, NULL);
#else
of = av_guess_format("avi", NULL, NULL);
#endif
/* Manually override the codec id. */
if (of)
of->video_codec = AV_CODEC_ID_MSMPEG4V2;
} else if (strcmp(codec, "swf") == 0) {
ext = ".swf";
#ifdef GUESS_NO_DEPRECATED
of = guess_format("mpeg1video", NULL, NULL);
#else
of = av_guess_format("swf", NULL, NULL);
#endif
} else if (strcmp(codec, "flv") == 0) {
ext = ".flv";
#ifdef GUESS_NO_DEPRECATED
of = guess_format("mpeg1video", NULL, NULL);
#else
of = av_guess_format("flv", NULL, NULL);
#endif
of->video_codec = AV_CODEC_ID_FLV1;
} else if (strcmp(codec, "ffv1") == 0) {
ext = ".avi";
#ifdef GUESS_NO_DEPRECATED
of = guess_format("mpeg1video", NULL, NULL);
#else
of = av_guess_format("avi", NULL, NULL);
#endif
/*
* Use the FFMPEG Lossless Video codec (experimental!).
* Requires strict_std_compliance to be <= -2
*/
if (of)
of->video_codec = AV_CODEC_ID_FFV1;
} else if (strcmp(codec, "mov") == 0) {
ext = ".mov";
#ifdef GUESS_NO_DEPRECATED
of = guess_format("mpeg1video", NULL, NULL);
#else
of = av_guess_format("mov", NULL, NULL);
#endif
}
else if (strcmp (codec, "ogg") == 0)
{
ext = ".ogg";
#ifdef GUESS_NO_DEPRECATED
of = guess_format ("ogg", NULL, NULL);
#else
of = av_guess_format ("ogg", NULL, NULL);
#endif
} else {
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, "%s: ffmpeg_video_codec option value"
" %s is not supported", codec);
return NULL;
}
if (!of) {
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, "%s: Could not guess format for %s",
codec);
return NULL;
}
/* The 4 allows for ".avi" or ".mpg" to be appended. */
strncat(filename, ext, 4);
return of;
}
/**
* ffmpeg_open
* Opens an mpeg file using the new libavformat method. Both mpeg1
* and mpeg4 are supported. However, if the current ffmpeg version doesn't allow
* mpeg1 with non-standard framerate, the open will fail. Timelapse is a special
* case and is tested separately.
*
* Returns
* A new allocated ffmpeg struct or NULL if any error happens.
*/
struct ffmpeg *ffmpeg_open(char *ffmpeg_video_codec, char *filename,
unsigned char *y, unsigned char *u, unsigned char *v,
int width, int height, int rate, int bps, int vbr)
{
AVCodecContext *c;
AVCodec *codec;
struct ffmpeg *ffmpeg;
int is_mpeg1;
int ret;
/*
* Allocate space for our ffmpeg structure. This structure contains all the
* codec and image information we need to generate movies.
* FIXME when motion exits we should close the movie to ensure that
* ffmpeg is freed.
*/
ffmpeg = mymalloc(sizeof(struct ffmpeg));
memset(ffmpeg, 0, sizeof(struct ffmpeg));
ffmpeg->vbr = vbr;
/* Store codec name in ffmpeg->codec, with buffer overflow check. */
snprintf(ffmpeg->codec, sizeof(ffmpeg->codec), "%s", ffmpeg_video_codec);
/* Allocation the output media context. */
#ifdef have_avformat_alloc_context
ffmpeg->oc = avformat_alloc_context();
#elif defined have_av_avformat_alloc_context
ffmpeg->oc = av_alloc_format_context();
#else
ffmpeg->oc = av_mallocz(sizeof(AVFormatContext));
#endif
if (!ffmpeg->oc) {
MOTION_LOG(ERR, TYPE_ENCODER, SHOW_ERRNO, "%s: Memory error while allocating"
" output media context");
ffmpeg_cleanups(ffmpeg);
return NULL;
}
/* Setup output format */
ffmpeg->oc->oformat = get_oformat(ffmpeg_video_codec, filename);
if (!ffmpeg->oc->oformat) {
ffmpeg_cleanups(ffmpeg);
return NULL;
}
snprintf(ffmpeg->oc->filename, sizeof(ffmpeg->oc->filename), "%s", filename);
/* Create a new video stream and initialize the codecs. */
ffmpeg->video_st = NULL;
if (ffmpeg->oc->oformat->video_codec != AV_CODEC_ID_NONE) {
#if defined FF_API_NEW_AVIO
ffmpeg->video_st = avformat_new_stream(ffmpeg->oc, NULL /* Codec */);
#else
ffmpeg->video_st = av_new_stream(ffmpeg->oc, 0);
#endif
if (!ffmpeg->video_st) {
MOTION_LOG(ERR, TYPE_ENCODER, SHOW_ERRNO, "%s: av_new_stream - could"
" not alloc stream");
ffmpeg_cleanups(ffmpeg);
return NULL;
}
} else {
/* We did not get a proper video codec. */
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, "%s: Failed to obtain a proper"
" video codec");
ffmpeg_cleanups(ffmpeg);
return NULL;
}
ffmpeg->c = c = AVSTREAM_CODEC_PTR(ffmpeg->video_st);
c->codec_id = ffmpeg->oc->oformat->video_codec;
#if LIBAVCODEC_VERSION_MAJOR < 53
c->codec_type = CODEC_TYPE_VIDEO;
#else
c->codec_type = AVMEDIA_TYPE_VIDEO;
#endif
is_mpeg1 = c->codec_id == AV_CODEC_ID_MPEG1VIDEO;
if (strcmp(ffmpeg_video_codec, "ffv1") == 0)
c->strict_std_compliance = -2;
/* Uncomment to allow non-standard framerates. */
//c->strict_std_compliance = -1;
/* Set default parameters */
c->bit_rate = bps;
c->width = width;
c->height = height;
#if LIBAVCODEC_BUILD >= 4754
/* Frame rate = 1/time_base, so we set 1/rate, not rate/1 */
c->time_base.num = 1;
c->time_base.den = rate;
#else
c->frame_rate = rate;
c->frame_rate_base = 1;
#endif /* LIBAVCODEC_BUILD >= 4754 */
MOTION_LOG(INF, TYPE_ENCODER, NO_ERRNO, "%s FPS %d",
rate);
if (vbr)
c->flags |= CODEC_FLAG_QSCALE;
/*
* Set codec specific parameters.
* Set intra frame distance in frames depending on codec.
*/
c->gop_size = is_mpeg1 ? 10 : 12;
/* Some formats want stream headers to be separate. */
if (!strcmp(ffmpeg->oc->oformat->name, "mp4") ||
!strcmp(ffmpeg->oc->oformat->name, "mov") ||
!strcmp(ffmpeg->oc->oformat->name, "3gp")) {
c->flags |= CODEC_FLAG_GLOBAL_HEADER;
}
#if defined FF_API_NEW_AVIO
// pass the options to avformat_write_header directly
#else
/* Set the output parameters (must be done even if no parameters). */
if (av_set_parameters(ffmpeg->oc, NULL) < 0) {
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, "%s: av_set_parameters error:"
" Invalid output format parameters");
ffmpeg_cleanups(ffmpeg);
return NULL;
}
#endif
/* Dump the format settings. This shows how the various streams relate to each other. */
//dump_format(ffmpeg->oc, 0, filename, 1);
/*
* Now that all the parameters are set, we can open the video
* codec and allocate the necessary encode buffers.
*/
codec = avcodec_find_encoder(c->codec_id);
if (!codec) {
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, "%s: Codec %s not found",
ffmpeg_video_codec);
ffmpeg_cleanups(ffmpeg);
return NULL;
}
/* Set the picture format - need in ffmpeg starting round April-May 2005 */
c->pix_fmt = AV_PIX_FMT_YUV420P;
/* Get a mutex lock. */
pthread_mutex_lock(&global_lock);
/* Open the codec */
#if defined FF_API_NEW_AVIO
ret = avcodec_open2(c, codec, NULL /* options */ );
#else
ret = avcodec_open(c, codec);
#endif
if (ret < 0) {
/* Release the lock. */
pthread_mutex_unlock(&global_lock);
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, "%s: avcodec_open - could not open codec %s",
ffmpeg_video_codec);
ffmpeg_cleanups(ffmpeg);
return NULL;
}
/* Release the lock. */
pthread_mutex_unlock(&global_lock);
ffmpeg->video_outbuf = NULL;
if (!(ffmpeg->oc->oformat->flags & AVFMT_RAWPICTURE)) {
/*
* Allocate output buffer
* XXX: API change will be done
* ffmpeg->video_outbuf_size = 200000
*/
ffmpeg->video_outbuf_size = ffmpeg->c->width * 512;
ffmpeg->video_outbuf = mymalloc(ffmpeg->video_outbuf_size);
}
/* Allocate the encoded raw picture. */
ffmpeg->picture = av_frame_alloc();
if (!ffmpeg->picture) {
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, "%s: avcodec_alloc_frame -"
" could not alloc frame");
ffmpeg_cleanups(ffmpeg);
return NULL;
}
/* Set variable bitrate if requested. */
if (ffmpeg->vbr)
ffmpeg->picture->quality = ffmpeg->vbr;
/* Set the frame data. */
ffmpeg->picture->data[0] = y;
ffmpeg->picture->data[1] = u;
ffmpeg->picture->data[2] = v;
ffmpeg->picture->linesize[0] = ffmpeg->c->width;
ffmpeg->picture->linesize[1] = ffmpeg->c->width / 2;
ffmpeg->picture->linesize[2] = ffmpeg->c->width / 2;
/* Open the output file, if needed. */
if (!(ffmpeg->oc->oformat->flags & AVFMT_NOFILE)) {
char file_proto[256];
/*
* Use append file protocol for mpeg1, to get the append behavior from
* url_fopen, but no protocol (=> default) for other codecs.
*/
if (is_mpeg1)
#if defined FF_API_NEW_AVIO
snprintf(file_proto, sizeof(file_proto), "%s", filename);
#else
snprintf(file_proto, sizeof(file_proto), APPEND_PROTO ":%s", filename);
#endif
else
snprintf(file_proto, sizeof(file_proto), "%s", filename);
#if defined FF_API_NEW_AVIO
if (avio_open(&ffmpeg->oc->pb, file_proto, URL_WRONLY) < 0) {
#else
if (url_fopen(&ffmpeg->oc->pb, file_proto, URL_WRONLY) < 0) {
#endif
/* Path did not exist? */
if (errno == ENOENT) {
/* Create path for file (don't use file_proto)... */
if (create_path(filename) == -1) {
ffmpeg_cleanups(ffmpeg);
return NULL;
}
#if defined FF_API_NEW_AVIO
if (avio_open(&ffmpeg->oc->pb, file_proto, URL_WRONLY) < 0) {
#else
/* And retry opening the file (use file_proto). */
if (url_fopen(&ffmpeg->oc->pb, file_proto, URL_WRONLY) < 0) {
#endif
MOTION_LOG(ERR, TYPE_ENCODER, SHOW_ERRNO, "%s: url_fopen -"
" error opening file %s", filename);
ffmpeg_cleanups(ffmpeg);
return NULL;
}
/* Permission denied */
} else if (errno == EACCES) {
MOTION_LOG(ERR, TYPE_ENCODER, SHOW_ERRNO,
"%s: url_fopen - error opening file %s"
" ... check access rights to target directory",
filename);
ffmpeg_cleanups(ffmpeg);
return NULL;
} else {
MOTION_LOG(ERR, TYPE_ENCODER, SHOW_ERRNO, "%s: Error opening file %s",
filename);
ffmpeg_cleanups(ffmpeg);
return NULL;
}
}
}
/* Write the stream header, if any. */
#if defined FF_API_NEW_AVIO
avformat_write_header(ffmpeg->oc, NULL);
#else
av_write_header(ffmpeg->oc);
#endif // FF_API_NEW_AVIO
return ffmpeg;
}
/**
* ffmpeg_cleanups
* Clean up ffmpeg struct if something was wrong.
*
* Returns
* Function returns nothing.
*/
void ffmpeg_cleanups(struct ffmpeg *ffmpeg)
{
unsigned int i;
/* Close each codec */
if (ffmpeg->video_st) {
pthread_mutex_lock(&global_lock);
#if LIBAVCODEC_BUILD > 4680
if (ffmpeg->video_st->codec->priv_data != NULL)
#endif
avcodec_close(AVSTREAM_CODEC_PTR(ffmpeg->video_st));
pthread_mutex_unlock(&global_lock);
av_freep(&ffmpeg->picture);
free(ffmpeg->video_outbuf);
}
/* Free the streams */
for (i = 0; i < ffmpeg->oc->nb_streams; i++)
av_freep(&ffmpeg->oc->streams[i]);
/* Free the stream */
av_free(ffmpeg->oc);
#if LIBAVFORMAT_BUILD >= 4629
av_free(ffmpeg->c);
#endif
free(ffmpeg);
}
/**
* ffmpeg_close
* Closes a video file.
*
* Returns
* Function returns nothing.
*/
void ffmpeg_close(struct ffmpeg *ffmpeg)
{
unsigned int i;
/* Close each codec */
if (ffmpeg->video_st) {
pthread_mutex_lock(&global_lock);
avcodec_close(AVSTREAM_CODEC_PTR(ffmpeg->video_st));
pthread_mutex_unlock(&global_lock);
av_freep(&ffmpeg->picture);
free(ffmpeg->video_outbuf);
}
/* Write the trailer, if any. */
av_write_trailer(ffmpeg->oc);
/* Free the streams. */
for (i = 0; i < ffmpeg->oc->nb_streams; i++)
av_freep(&ffmpeg->oc->streams[i]);
if (!(ffmpeg->oc->oformat->flags & AVFMT_NOFILE)) {
/* Close the output file. */
#if defined FF_API_NEW_AVIO
avio_close(ffmpeg->oc->pb);
#elif LIBAVFORMAT_BUILD >= (52<<16)
url_fclose(ffmpeg->oc->pb);
#else
url_fclose(&ffmpeg->oc->pb);
#endif /* FF_API_NEW_AVIO -- LIBAVFORMAT_BUILD >= (52<<16) */
}
/* Free the stream. */
av_free(ffmpeg->oc);
#if LIBAVFORMAT_BUILD >= 4629
av_free(ffmpeg->c);
#endif
free(ffmpeg);
}
/**
* ffmpeg_put_image
* Puts the image pointed to by ffmpeg->picture.
*
* Returns
* value returned by ffmpeg_put_frame call.
*/
int ffmpeg_put_image(struct ffmpeg *ffmpeg)
{
return ffmpeg_put_frame(ffmpeg, ffmpeg->picture);
}
/**
* ffmpeg_put_other_image
* Puts an arbitrary picture defined by y, u and v.
*
* Returns
* Number of bytes written by ffmpeg_put_frame
* -1 if any error happens in ffmpeg_put_frame
* 0 if error allocating picture.
*/
int ffmpeg_put_other_image(struct ffmpeg *ffmpeg, unsigned char *y,
unsigned char *u, unsigned char *v)
{
AVFrame *picture;
int ret = 0;
/* Allocate the encoded raw picture. */
picture = ffmpeg_prepare_frame(ffmpeg, y, u, v);
if (picture) {
ret = ffmpeg_put_frame(ffmpeg, picture);
if (!ret)
av_free(picture);
}
return ret;
}
/**
* ffmpeg_put_frame
* Encodes and writes a video frame using the av_write_frame API. This is
* a helper function for ffmpeg_put_image and ffmpeg_put_other_image.
*
* Returns
* Number of bytes written or -1 if any error happens.
*/
int ffmpeg_put_frame(struct ffmpeg *ffmpeg, AVFrame *pic)
{
int out_size, ret, got_packet_ptr;
#ifdef FFMPEG_AVWRITEFRAME_NEWAPI
AVPacket pkt;
av_init_packet(&pkt); /* Init static structure. */
pkt.stream_index = ffmpeg->video_st->index;
#endif /* FFMPEG_AVWRITEFRAME_NEWAPI */
if (ffmpeg->oc->oformat->flags & AVFMT_RAWPICTURE) {
/* Raw video case. The API will change slightly in the near future for that. */
#ifdef FFMPEG_AVWRITEFRAME_NEWAPI
# if LIBAVCODEC_VERSION_MAJOR < 53
pkt.flags |= PKT_FLAG_KEY;
# else
pkt.flags |= AV_PKT_FLAG_KEY;
# endif
pkt.data = (uint8_t *)pic;
pkt.size = sizeof(AVPicture);
ret = av_write_frame(ffmpeg->oc, &pkt);
#else
ret = av_write_frame(ffmpeg->oc, ffmpeg->video_st->index,
(uint8_t *)pic, sizeof(AVPicture));
#endif /* FFMPEG_AVWRITEFRAME_NEWAPI */
} else {
/* Encodes the image. */
#if defined FF_API_NEW_AVIO
pkt.data = ffmpeg->video_outbuf;
pkt.size = ffmpeg->video_outbuf_size;
out_size = avcodec_encode_video2(AVSTREAM_CODEC_PTR(ffmpeg->video_st),
&pkt, pic, &got_packet_ptr);
if (out_size < 0)
// Error encondig
out_size = 0;
else
out_size = pkt.size;
#else
out_size = avcodec_encode_video(AVSTREAM_CODEC_PTR(ffmpeg->video_st),
ffmpeg->video_outbuf,
ffmpeg->video_outbuf_size, pic);
#endif
/* If zero size, it means the image was buffered. */
if (out_size != 0) {
/*
* Writes the compressed frame in the media file.
* XXX: in case of B frames, the pts is not yet valid.
*/
#ifdef FFMPEG_AVWRITEFRAME_NEWAPI
pkt.pts = AVSTREAM_CODEC_PTR(ffmpeg->video_st)->coded_frame->pts;
if (AVSTREAM_CODEC_PTR(ffmpeg->video_st)->coded_frame->key_frame)
# if LIBAVCODEC_VERSION_MAJOR < 53
pkt.flags |= PKT_FLAG_KEY;
# else
pkt.flags |= AV_PKT_FLAG_KEY;
# endif
pkt.data = ffmpeg->video_outbuf;
pkt.size = out_size;
ret = av_write_frame(ffmpeg->oc, &pkt);
#else
ret = av_write_frame(ffmpeg->oc, ffmpeg->video_st->index,
ffmpeg->video_outbuf, out_size);
#endif /* FFMPEG_AVWRITEFRAME_NEWAPI */
} else {
ret = 0;
}
}
if (ret != 0) {
MOTION_LOG(ERR, TYPE_ENCODER, SHOW_ERRNO, "%s: Error while writing"
" video frame");
ffmpeg_cleanups(ffmpeg);
return -1;
}
return ret;
}
/**
* ffmpeg_prepare_frame
* Allocates and prepares a picture frame by setting up the U, Y and V pointers in
* the frame according to the passed pointers.
*
* Returns
* NULL If the allocation fails.
*
* The returned AVFrame pointer must be freed after use.
*/
AVFrame *ffmpeg_prepare_frame(struct ffmpeg *ffmpeg, unsigned char *y,
unsigned char *u, unsigned char *v)
{
AVFrame *picture;
picture = av_frame_alloc();
if (!picture) {
MOTION_LOG(ERR, TYPE_ENCODER, SHOW_ERRNO, "%s: Could not alloc frame");
return NULL;
}
/* Take care of variable bitrate setting. */
if (ffmpeg->vbr)
picture->quality = ffmpeg->vbr;
/* Setup pointers and line widths. */
picture->data[0] = y;
picture->data[1] = u;
picture->data[2] = v;
picture->linesize[0] = ffmpeg->c->width;
picture->linesize[1] = ffmpeg->c->width / 2;
picture->linesize[2] = ffmpeg->c->width / 2;
return picture;
}
// remove deinterlace function as in newer ffmpeg lib the effort needed to deinterlace is huge (via yadif filter)
#if 0
/**
* ffmpeg_deinterlace
* Make the image suitable for deinterlacing using ffmpeg, then deinterlace the picture.
*
* Parameters
* img image in YUV420P format
* width image width in pixels
* height image height in pixels
*
* Returns
* Function returns nothing.
* img contains deinterlaced image
*/
void ffmpeg_deinterlace(unsigned char *img, int width, int height)
{
AVPicture picture;
int width2 = width / 2;
picture.data[0] = img;
picture.data[1] = img + width * height;
picture.data[2] = picture.data[1] + (width * height) / 4;
picture.linesize[0] = width;
picture.linesize[1] = width2;
picture.linesize[2] = width2;