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Diffstat (limited to 'source/gameengine/VideoTexture/VideoFFmpeg.cpp')
| -rw-r--r-- | source/gameengine/VideoTexture/VideoFFmpeg.cpp | 927 |
1 files changed, 927 insertions, 0 deletions
diff --git a/source/gameengine/VideoTexture/VideoFFmpeg.cpp b/source/gameengine/VideoTexture/VideoFFmpeg.cpp new file mode 100644 index 00000000000..02798c7e596 --- /dev/null +++ b/source/gameengine/VideoTexture/VideoFFmpeg.cpp @@ -0,0 +1,927 @@ +/* $Id$ +----------------------------------------------------------------------------- +This source file is part of VideoTexture library + +Copyright (c) 2007 The Zdeno Ash Miklas + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU Lesser General Public License as published by the Free Software +Foundation; either version 2 of the License, or (at your option) any later +version. + +This program is distributed in the hope that it will be useful, but WITHOUT +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along with +this program; if not, write to the Free Software Foundation, Inc., 59 Temple +Place - Suite 330, Boston, MA 02111-1307, USA, or go to +http://www.gnu.org/copyleft/lesser.txt. +----------------------------------------------------------------------------- +*/ + +#ifdef WITH_FFMPEG + +// INT64_C fix for some linux machines (C99ism) +#define __STDC_CONSTANT_MACROS +#include <stdint.h> + + +#include "MEM_guardedalloc.h" +#include "PIL_time.h" + +#include <string> + +#include "Exception.h" +#include "VideoFFmpeg.h" + + +// default framerate +const double defFrameRate = 25.0; +// time scale constant +const long timeScale = 1000; + +// macro for exception handling and logging +#define CATCH_EXCP catch (Exception & exp) \ +{ exp.report(); m_status = SourceError; } + +extern "C" void do_init_ffmpeg(); + +// class RenderVideo + +// constructor +VideoFFmpeg::VideoFFmpeg (HRESULT * hRslt) : VideoBase(), +m_codec(NULL), m_formatCtx(NULL), m_codecCtx(NULL), +m_frame(NULL), m_frameDeinterlaced(NULL), m_frameRGB(NULL), m_imgConvertCtx(NULL), +m_deinterlace(false), m_preseek(0), m_videoStream(-1), m_baseFrameRate(25.0), +m_lastFrame(-1), m_eof(false), m_curPosition(-1), m_startTime(0), +m_captWidth(0), m_captHeight(0), m_captRate(0.f), m_isImage(false) +{ + // set video format + m_format = RGB24; + // force flip because ffmpeg always return the image in the wrong orientation for texture + setFlip(true); + // construction is OK + *hRslt = S_OK; +} + +// destructor +VideoFFmpeg::~VideoFFmpeg () +{ +} + + +// release components +bool VideoFFmpeg::release() +{ + // release + if (m_codecCtx) + { + avcodec_close(m_codecCtx); + m_codecCtx = NULL; + } + if (m_formatCtx) + { + av_close_input_file(m_formatCtx); + m_formatCtx = NULL; + } + if (m_frame) + { + av_free(m_frame); + m_frame = NULL; + } + if (m_frameDeinterlaced) + { + MEM_freeN(m_frameDeinterlaced->data[0]); + av_free(m_frameDeinterlaced); + m_frameDeinterlaced = NULL; + } + if (m_frameRGB) + { + MEM_freeN(m_frameRGB->data[0]); + av_free(m_frameRGB); + m_frameRGB = NULL; + } + if (m_imgConvertCtx) + { + sws_freeContext(m_imgConvertCtx); + m_imgConvertCtx = NULL; + } + m_codec = NULL; + m_status = SourceStopped; + return true; +} + + +// set initial parameters +void VideoFFmpeg::initParams (short width, short height, float rate, bool image) +{ + m_captWidth = width; + m_captHeight = height; + m_captRate = rate; + m_isImage = image; +} + +int VideoFFmpeg::openStream(const char *filename, AVInputFormat *inputFormat, AVFormatParameters *formatParams) +{ + AVFormatContext *formatCtx; + int i, videoStream; + AVCodec *codec; + AVCodecContext *codecCtx; + + if(av_open_input_file(&formatCtx, filename, inputFormat, 0, formatParams)!=0) + return -1; + + if(av_find_stream_info(formatCtx)<0) + { + av_close_input_file(formatCtx); + return -1; + } + + /* Find the first video stream */ + videoStream=-1; + for(i=0; i<formatCtx->nb_streams; i++) + { + if(formatCtx->streams[i] && + get_codec_from_stream(formatCtx->streams[i]) && + (get_codec_from_stream(formatCtx->streams[i])->codec_type==CODEC_TYPE_VIDEO)) + { + videoStream=i; + break; + } + } + + if(videoStream==-1) + { + av_close_input_file(formatCtx); + return -1; + } + + codecCtx = get_codec_from_stream(formatCtx->streams[videoStream]); + + /* Find the decoder for the video stream */ + codec=avcodec_find_decoder(codecCtx->codec_id); + if(codec==NULL) + { + av_close_input_file(formatCtx); + return -1; + } + codecCtx->workaround_bugs = 1; + if(avcodec_open(codecCtx, codec)<0) + { + av_close_input_file(formatCtx); + return -1; + } + +#ifdef FFMPEG_OLD_FRAME_RATE + if(codecCtx->frame_rate>1000 && codecCtx->frame_rate_base==1) + codecCtx->frame_rate_base=1000; + m_baseFrameRate = (double)codecCtx->frame_rate / (double)codecCtx->frame_rate_base; +#else + m_baseFrameRate = av_q2d(formatCtx->streams[videoStream]->r_frame_rate); +#endif + if (m_baseFrameRate <= 0.0) + m_baseFrameRate = defFrameRate; + + m_codec = codec; + m_codecCtx = codecCtx; + m_formatCtx = formatCtx; + m_videoStream = videoStream; + m_frame = avcodec_alloc_frame(); + m_frameDeinterlaced = avcodec_alloc_frame(); + m_frameRGB = avcodec_alloc_frame(); + + // allocate buffer if deinterlacing is required + avpicture_fill((AVPicture*)m_frameDeinterlaced, + (uint8_t*)MEM_callocN(avpicture_get_size( + m_codecCtx->pix_fmt, + m_codecCtx->width, m_codecCtx->height), + "ffmpeg deinterlace"), + m_codecCtx->pix_fmt, m_codecCtx->width, m_codecCtx->height); + + // check if the pixel format supports Alpha + if (m_codecCtx->pix_fmt == PIX_FMT_RGB32 || + m_codecCtx->pix_fmt == PIX_FMT_BGR32 || + m_codecCtx->pix_fmt == PIX_FMT_RGB32_1 || + m_codecCtx->pix_fmt == PIX_FMT_BGR32_1) + { + // allocate buffer to store final decoded frame + m_format = RGBA32; + avpicture_fill((AVPicture*)m_frameRGB, + (uint8_t*)MEM_callocN(avpicture_get_size( + PIX_FMT_RGBA, + m_codecCtx->width, m_codecCtx->height), + "ffmpeg rgba"), + PIX_FMT_RGBA, m_codecCtx->width, m_codecCtx->height); + // allocate sws context + m_imgConvertCtx = sws_getContext( + m_codecCtx->width, + m_codecCtx->height, + m_codecCtx->pix_fmt, + m_codecCtx->width, + m_codecCtx->height, + PIX_FMT_RGBA, + SWS_FAST_BILINEAR, + NULL, NULL, NULL); + } else + { + // allocate buffer to store final decoded frame + m_format = RGB24; + avpicture_fill((AVPicture*)m_frameRGB, + (uint8_t*)MEM_callocN(avpicture_get_size( + PIX_FMT_RGB24, + m_codecCtx->width, m_codecCtx->height), + "ffmpeg rgb"), + PIX_FMT_RGB24, m_codecCtx->width, m_codecCtx->height); + // allocate sws context + m_imgConvertCtx = sws_getContext( + m_codecCtx->width, + m_codecCtx->height, + m_codecCtx->pix_fmt, + m_codecCtx->width, + m_codecCtx->height, + PIX_FMT_RGB24, + SWS_FAST_BILINEAR, + NULL, NULL, NULL); + } + if (!m_imgConvertCtx) { + avcodec_close(m_codecCtx); + av_close_input_file(m_formatCtx); + av_free(m_frame); + MEM_freeN(m_frameDeinterlaced->data[0]); + av_free(m_frameDeinterlaced); + MEM_freeN(m_frameRGB->data[0]); + av_free(m_frameRGB); + return -1; + } + return 0; +} + +// open video file +void VideoFFmpeg::openFile (char * filename) +{ + do_init_ffmpeg(); + + if (openStream(filename, NULL, NULL) != 0) + return; + + if (m_codecCtx->gop_size) + m_preseek = (m_codecCtx->gop_size < 25) ? m_codecCtx->gop_size+1 : 25; + else if (m_codecCtx->has_b_frames) + m_preseek = 25; // should determine gopsize + else + m_preseek = 0; + + // get video time range + m_range[0] = 0.0; + m_range[1] = (double)m_formatCtx->duration / AV_TIME_BASE; + + // open base class + VideoBase::openFile(filename); + + if ( +#ifdef FFMPEG_PB_IS_POINTER + m_formatCtx->pb && m_formatCtx->pb->is_streamed +#else + m_formatCtx->pb.is_streamed +#endif + ) + { + // the file is in fact a streaming source, prevent seeking + m_isFile = false; + // for streaming it is important to do non blocking read + m_formatCtx->flags |= AVFMT_FLAG_NONBLOCK; + } + + if (m_isImage) + { + // the file is to be treated as an image, i.e. load the first frame only + m_isFile = false; + // in case of reload, the filename is taken from m_imageName, no need to change it + if (m_imageName.Ptr() != filename) + m_imageName = filename; + m_preseek = 0; + m_avail = false; + play(); + } + +} + + +// open video capture device +void VideoFFmpeg::openCam (char * file, short camIdx) +{ + // open camera source + AVInputFormat *inputFormat; + AVFormatParameters formatParams; + AVRational frameRate; + char *p, filename[28], rateStr[20]; + + do_init_ffmpeg(); + + memset(&formatParams, 0, sizeof(formatParams)); +#ifdef WIN32 + // video capture on windows only through Video For Windows driver + inputFormat = av_find_input_format("vfwcap"); + if (!inputFormat) + // Video For Windows not supported?? + return; + sprintf(filename, "%d", camIdx); +#else + // In Linux we support two types of devices: VideoForLinux and DV1394. + // the user specify it with the filename: + // [<device_type>][:<standard>] + // <device_type> : 'v4l' for VideoForLinux, 'dv1394' for DV1394. By default 'v4l' + // <standard> : 'pal', 'secam' or 'ntsc'. By default 'ntsc' + // The driver name is constructed automatically from the device type: + // v4l : /dev/video<camIdx> + // dv1394: /dev/dv1394/<camIdx> + // If you have different driver name, you can specify the driver name explicitely + // instead of device type. Examples of valid filename: + // /dev/v4l/video0:pal + // /dev/ieee1394/1:ntsc + // dv1394:secam + // v4l:pal + if (file && strstr(file, "1394") != NULL) + { + // the user specifies a driver, check if it is v4l or d41394 + inputFormat = av_find_input_format("dv1394"); + sprintf(filename, "/dev/dv1394/%d", camIdx); + } else + { + inputFormat = av_find_input_format("video4linux"); + sprintf(filename, "/dev/video%d", camIdx); + } + if (!inputFormat) + // these format should be supported, check ffmpeg compilation + return; + if (file && strncmp(file, "/dev", 4) == 0) + { + // user does not specify a driver + strncpy(filename, file, sizeof(filename)); + filename[sizeof(filename)-1] = 0; + if ((p = strchr(filename, ':')) != 0) + *p = 0; + } + if (file && (p = strchr(file, ':')) != NULL) + formatParams.standard = p+1; +#endif + //frame rate + if (m_captRate <= 0.f) + m_captRate = defFrameRate; + sprintf(rateStr, "%f", m_captRate); + av_parse_video_frame_rate(&frameRate, rateStr); + // populate format parameters + // need to specify the time base = inverse of rate + formatParams.time_base.num = frameRate.den; + formatParams.time_base.den = frameRate.num; + formatParams.width = m_captWidth; + formatParams.height = m_captHeight; + + if (openStream(filename, inputFormat, &formatParams) != 0) + return; + + // for video capture it is important to do non blocking read + m_formatCtx->flags |= AVFMT_FLAG_NONBLOCK; + // open base class + VideoBase::openCam(file, camIdx); +} + +// play video +bool VideoFFmpeg::play (void) +{ + try + { + // if object is able to play + if (VideoBase::play()) + { + // set video position + setPositions(); + // return success + return true; + } + } + CATCH_EXCP; + return false; +} + + +// stop video +bool VideoFFmpeg::stop (void) +{ + try + { + if (VideoBase::stop()) + { + return true; + } + } + CATCH_EXCP; + return false; +} + + +// set video range +void VideoFFmpeg::setRange (double start, double stop) +{ + try + { + // set range + VideoBase::setRange(start, stop); + // set range for video + setPositions(); + } + CATCH_EXCP; +} + +// set framerate +void VideoFFmpeg::setFrameRate (float rate) +{ + VideoBase::setFrameRate(rate); +} + + +// image calculation +void VideoFFmpeg::calcImage (unsigned int texId) +{ + loadFrame(); +} + + +// load frame from video +void VideoFFmpeg::loadFrame (void) +{ + // get actual time + double actTime = PIL_check_seconds_timer() - m_startTime; + // if video has ended + if (m_isFile && actTime * m_frameRate >= m_range[1]) + { + // if repeats are set, decrease them + if (m_repeat > 0) + --m_repeat; + // if video has to be replayed + if (m_repeat != 0) + { + // reset its position + actTime -= (m_range[1] - m_range[0]) / m_frameRate; + m_startTime += (m_range[1] - m_range[0]) / m_frameRate; + } + // if video has to be stopped, stop it + else + m_status = SourceStopped; + } + // if video is playing + if (m_status == SourcePlaying) + { + // actual frame + long actFrame = m_isFile ? long(actTime * actFrameRate()) : m_lastFrame + 1; + // if actual frame differs from last frame + if (actFrame != m_lastFrame) + { + // get image + if(grabFrame(actFrame)) + { + AVFrame* frame = getFrame(); + // save actual frame + m_lastFrame = actFrame; + // init image, if needed + init(short(m_codecCtx->width), short(m_codecCtx->height)); + // process image + process((BYTE*)(frame->data[0])); + // in case it is an image, automatically stop reading it + if (m_isImage) + { + m_status = SourceStopped; + // close the file as we don't need it anymore + release(); + } + } + } + } +} + + +// set actual position +void VideoFFmpeg::setPositions (void) +{ + // set video start time + m_startTime = PIL_check_seconds_timer(); + // if file is played and actual position is before end position + if (m_isFile && !m_eof && m_lastFrame >= 0 && m_lastFrame < m_range[1] * actFrameRate()) + // continue from actual position + m_startTime -= double(m_lastFrame) / actFrameRate(); + else + m_startTime -= m_range[0]; +} + +// position pointer in file, position in second +bool VideoFFmpeg::grabFrame(long position) +{ + AVPacket packet; + int frameFinished; + int posFound = 1; + bool frameLoaded = false; + long long targetTs = 0; + + // first check if the position that we are looking for is in the preseek range + // if so, just read the frame until we get there + if (position > m_curPosition + 1 + && m_preseek + && position - (m_curPosition + 1) < m_preseek) + { + while(av_read_frame(m_formatCtx, &packet)>=0) + { + if (packet.stream_index == m_videoStream) + { + avcodec_decode_video( + m_codecCtx, + m_frame, &frameFinished, + packet.data, packet.size); + if (frameFinished) + m_curPosition++; + } + av_free_packet(&packet); + if (position == m_curPosition+1) + break; + } + } + // if the position is not in preseek, do a direct jump + if (position != m_curPosition + 1) + { + double timeBase = av_q2d(m_formatCtx->streams[m_videoStream]->time_base); + long long pos = (long long) + ((long long) (position - m_preseek) * AV_TIME_BASE / m_baseFrameRate); + long long startTs = m_formatCtx->streams[m_videoStream]->start_time; + + if (pos < 0) + pos = 0; + + if (startTs != AV_NOPTS_VALUE) + pos += (long long)(startTs * AV_TIME_BASE * timeBase); + + if (position <= m_curPosition || !m_eof) + { + // no need to seek past the end of the file + if (av_seek_frame(m_formatCtx, -1, pos, AVSEEK_FLAG_BACKWARD) >= 0) + { + // current position is now lost, guess a value. + // It's not important because it will be set at this end of this function + m_curPosition = position - m_preseek - 1; + } + } + // this is the timestamp of the frame we're looking for + targetTs = (long long)(((double) position) / m_baseFrameRate / timeBase); + if (startTs != AV_NOPTS_VALUE) + targetTs += startTs; + + posFound = 0; + avcodec_flush_buffers(m_codecCtx); + } + + while(av_read_frame(m_formatCtx, &packet)>=0) + { + if(packet.stream_index == m_videoStream) + { + avcodec_decode_video(m_codecCtx, + m_frame, &frameFinished, + packet.data, packet.size); + + if (frameFinished && !posFound) + { + if (packet.dts >= targetTs) + posFound = 1; + } + + if(frameFinished && posFound == 1) + { + AVFrame * input = m_frame; + + /* This means the data wasnt read properly, + this check stops crashing */ + if ( input->data[0]==0 && input->data[1]==0 + && input->data[2]==0 && input->data[3]==0) + { + av_free_packet(&packet); + break; + } + + if (m_deinterlace) + { + if (avpicture_deinterlace( + (AVPicture*) m_frameDeinterlaced, + (const AVPicture*) m_frame, + m_codecCtx->pix_fmt, + m_codecCtx->width, + m_codecCtx->height) >= 0) + { + input = m_frameDeinterlaced; + } + } + // convert to RGB24 + sws_scale(m_imgConvertCtx, + input->data, + input->linesize, + 0, + m_codecCtx->height, + m_frameRGB->data, + m_frameRGB->linesize); + av_free_packet(&packet); + frameLoaded = true; + break; + } + } + av_free_packet(&packet); + } + m_eof = !frameLoaded; + if (frameLoaded) + m_curPosition = position; + return frameLoaded; +} + + +// python methods + + +// cast Image pointer to VideoFFmpeg +inline VideoFFmpeg * getVideoFFmpeg (PyImage * self) +{ return static_cast<VideoFFmpeg*>(self->m_image); } + + +// object initialization +static int VideoFFmpeg_init (PyObject * pySelf, PyObject * args, PyObject * kwds) +{ + PyImage * self = reinterpret_cast<PyImage*>(pySelf); + // parameters - video source + // file name or format type for capture (only for Linux: video4linux or dv1394) + char * file = NULL; + // capture device number + short capt = -1; + // capture width, only if capt is >= 0 + short width = 0; + // capture height, only if capt is >= 0 + short height = 0; + // capture rate, only if capt is >= 0 + float rate = 25.f; + + static char *kwlist[] = {"file", "capture", "rate", "width", "height", NULL}; + + // get parameters + if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|hfhh", kwlist, &file, &capt, + &rate, &width, &height)) + return -1; + + try + { + // create video object + Video_init<VideoFFmpeg>(self); + + // set thread usage + getVideoFFmpeg(self)->initParams(width, height, rate); + + // open video source + Video_open(getVideo(self), file, capt); + } + catch (Exception & exp) + { + exp.report(); + return -1; + } + // initialization succeded + return 0; +} + +PyObject * VideoFFmpeg_getPreseek (PyImage *self, void * closure) +{ + return Py_BuildValue("h", getFFmpeg(self)->getPreseek()); +} + +// set range +int VideoFFmpeg_setPreseek (PyImage * self, PyObject * value, void * closure) +{ + // check validity of parameter + if (value == NULL || !PyInt_Check(value)) + { + PyErr_SetString(PyExc_TypeError, "The value must be an integer"); + return -1; + } + // set preseek + getFFmpeg(self)->setPreseek(PyInt_AsLong(value)); + // success + return 0; +} + +// get deinterlace +PyObject * VideoFFmpeg_getDeinterlace (PyImage * self, void * closure) +{ + if (getFFmpeg(self)->getDeinterlace()) + Py_RETURN_TRUE; + else + Py_RETURN_FALSE; +} + +// set flip +int VideoFFmpeg_setDeinterlace (PyImage * self, PyObject * value, void * closure) +{ + // check parameter, report failure + if (value == NULL || !PyBool_Check(value)) + { + PyErr_SetString(PyExc_TypeError, "The value must be a bool"); + return -1; + } + // set deinterlace + getFFmpeg(self)->setDeinterlace(value == Py_True); + // success + return 0; +} + +// methods structure +static PyMethodDef videoMethods[] = +{ // methods from VideoBase class + {"play", (PyCFunction)Video_play, METH_NOARGS, "Play video"}, + {"stop", (PyCFunction)Video_stop, METH_NOARGS, "Stop (pause) video"}, + {"refresh", (PyCFunction)Video_refresh, METH_NOARGS, "Refresh video - get its status"}, + {NULL} +}; +// attributes structure +static PyGetSetDef videoGetSets[] = +{ // methods from VideoBase class + {(char*)"status", (getter)Video_getStatus, NULL, (char*)"video status", NULL}, + {(char*)"range", (getter)Video_getRange, (setter)Video_setRange, (char*)"replay range", NULL}, + {(char*)"repeat", (getter)Video_getRepeat, (setter)Video_setRepeat, (char*)"repeat count, -1 for infinite repeat", NULL}, + {(char*)"framerate", (getter)Video_getFrameRate, (setter)Video_setFrameRate, (char*)"frame rate", NULL}, + // attributes from ImageBase class + {(char*)"image", (getter)Image_getImage, NULL, (char*)"image data", NULL}, + {(char*)"size", (getter)Image_getSize, NULL, (char*)"image size", NULL}, + {(char*)"scale", (getter)Image_getScale, (setter)Image_setScale, (char*)"fast scale of image (near neighbour)", NULL}, + {(char*)"flip", (getter)Image_getFlip, (setter)Image_setFlip, (char*)"flip image vertically", NULL}, + {(char*)"filter", (getter)Image_getFilter, (setter)Image_setFilter, (char*)"pixel filter", NULL}, + {(char*)"preseek", (getter)VideoFFmpeg_getPreseek, (setter)VideoFFmpeg_setPreseek, (char*)"nb of frames of preseek", NULL}, + {(char*)"deinterlace", (getter)VideoFFmpeg_getDeinterlace, (setter)VideoFFmpeg_setDeinterlace, (char*)"deinterlace image", NULL}, + {NULL} +}; + +// python type declaration +PyTypeObject VideoFFmpegType = +{ + PyObject_HEAD_INIT(NULL) + 0, /*ob_size*/ + "VideoTexture.VideoFFmpeg", /*tp_name*/ + sizeof(PyImage), /*tp_basicsize*/ + 0, /*tp_itemsize*/ + (destructor)Image_dealloc, /*tp_dealloc*/ + 0, /*tp_print*/ + 0, /*tp_getattr*/ + 0, /*tp_setattr*/ + 0, /*tp_compare*/ + 0, /*tp_repr*/ + 0, /*tp_as_number*/ + 0, /*tp_as_sequence*/ + 0, /*tp_as_mapping*/ + 0, /*tp_hash */ + 0, /*tp_call*/ + 0, /*tp_str*/ + 0, /*tp_getattro*/ + 0, /*tp_setattro*/ + 0, /*tp_as_buffer*/ + Py_TPFLAGS_DEFAULT, /*tp_flags*/ + "FFmpeg video source", /* tp_doc */ + 0, /* tp_traverse */ + 0, /* tp_clear */ + 0, /* tp_richcompare */ + 0, /* tp_weaklistoffset */ + 0, /* tp_iter */ + 0, /* tp_iternext */ + videoMethods, /* tp_methods */ + 0, /* tp_members */ + videoGetSets, /* tp_getset */ + 0, /* tp_base */ + 0, /* tp_dict */ + 0, /* tp_descr_get */ + 0, /* tp_descr_set */ + 0, /* tp_dictoffset */ + (initproc)VideoFFmpeg_init, /* tp_init */ + 0, /* tp_alloc */ + Image_allocNew, /* tp_new */ +}; + +// object initialization +static int ImageFFmpeg_init (PyObject * pySelf, PyObject * args, PyObject * kwds) +{ + PyImage * self = reinterpret_cast<PyImage*>(pySelf); + // parameters - video source + // file name or format type for capture (only for Linux: video4linux or dv1394) + char * file = NULL; + + // get parameters + if (!PyArg_ParseTuple(args, "s", &file)) + return -1; + + try + { + // create video object + Video_init<VideoFFmpeg>(self); + + getVideoFFmpeg(self)->initParams(0, 0, 1.0, true); + + // open video source + Video_open(getVideo(self), file, -1); + } + catch (Exception & exp) + { + exp.report(); + return -1; + } + // initialization succeded + return 0; +} + +PyObject * Image_reload (PyImage * self, PyObject *args) +{ + char * newname = NULL; + + if (self->m_image != NULL && PyArg_ParseTuple(args, "|s", &newname)) + { + VideoFFmpeg* video = getFFmpeg(self); + // check type of object + if (!newname) + newname = video->getImageName(); + if (!newname) { + // if not set, retport error + PyErr_SetString(PyExc_RuntimeError, "No image file name given"); + return NULL; + } + // make sure the previous file is cleared + video->release(); + // open the new file + video->openFile(newname); + } + Py_RETURN_NONE; +} + +// methods structure +static PyMethodDef imageMethods[] = +{ // methods from VideoBase class + {"refresh", (PyCFunction)Video_refresh, METH_NOARGS, "Refresh image, i.e. load it"}, + {"reload", (PyCFunction)Image_reload, METH_VARARGS, "Reload image, i.e. reopen it"}, + {NULL} +}; +// attributes structure +static PyGetSetDef imageGetSets[] = +{ // methods from VideoBase class + {(char*)"status", (getter)Video_getStatus, NULL, (char*)"video status", NULL}, + // attributes from ImageBase class + {(char*)"image", (getter)Image_getImage, NULL, (char*)"image data", NULL}, + {(char*)"size", (getter)Image_getSize, NULL, (char*)"image size", NULL}, + {(char*)"scale", (getter)Image_getScale, (setter)Image_setScale, (char*)"fast scale of image (near neighbour)", NULL}, + {(char*)"flip", (getter)Image_getFlip, (setter)Image_setFlip, (char*)"flip image vertically", NULL}, + {(char*)"filter", (getter)Image_getFilter, (setter)Image_setFilter, (char*)"pixel filter", NULL}, + {NULL} +}; + +// python type declaration +PyTypeObject ImageFFmpegType = +{ + PyObject_HEAD_INIT(NULL) + 0, /*ob_size*/ + "VideoTexture.ImageFFmpeg", /*tp_name*/ + sizeof(PyImage), /*tp_basicsize*/ + 0, /*tp_itemsize*/ + (destructor)Image_dealloc, /*tp_dealloc*/ + 0, /*tp_print*/ + 0, /*tp_getattr*/ + 0, /*tp_setattr*/ + 0, /*tp_compare*/ + 0, /*tp_repr*/ + 0, /*tp_as_number*/ + 0, /*tp_as_sequence*/ + 0, /*tp_as_mapping*/ + 0, /*tp_hash */ + 0, /*tp_call*/ + 0, /*tp_str*/ + 0, /*tp_getattro*/ + 0, /*tp_setattro*/ + 0, /*tp_as_buffer*/ + Py_TPFLAGS_DEFAULT, /*tp_flags*/ + "FFmpeg image source", /* tp_doc */ + 0, /* tp_traverse */ + 0, /* tp_clear */ + 0, /* tp_richcompare */ + 0, /* tp_weaklistoffset */ + 0, /* tp_iter */ + 0, /* tp_iternext */ + imageMethods, /* tp_methods */ + 0, /* tp_members */ + imageGetSets, /* tp_getset */ + 0, /* tp_base */ + 0, /* tp_dict */ + 0, /* tp_descr_get */ + 0, /* tp_descr_set */ + 0, /* tp_dictoffset */ + (initproc)ImageFFmpeg_init, /* tp_init */ + 0, /* tp_alloc */ + Image_allocNew, /* tp_new */ +}; + +#endif //WITH_FFMPEG + + |