759 lines
19 KiB
C++
759 lines
19 KiB
C++
/* $Id$
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-----------------------------------------------------------------------------
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This source file is part of VideoTexture library
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Copyright (c) 2007 The Zdeno Ash Miklas
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place - Suite 330, Boston, MA 02111-1307, USA, or go to
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http://www.gnu.org/copyleft/lesser.txt.
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-----------------------------------------------------------------------------
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*/
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// INT64_C fix for some linux machines (C99ism)
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#define __STDC_CONSTANT_MACROS
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#include <stdint.h>
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#include "MEM_guardedalloc.h"
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#include "PIL_time.h"
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#include <string>
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#include "Exception.h"
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#include "VideoFFmpeg.h"
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#ifdef WITH_FFMPEG
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// default framerate
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const double defFrameRate = 25.0;
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// time scale constant
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const long timeScale = 1000;
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// macro for exception handling and logging
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#define CATCH_EXCP catch (Exception & exp) \
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{ exp.report(); m_status = SourceError; }
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extern "C" void do_init_ffmpeg();
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// class RenderVideo
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// constructor
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VideoFFmpeg::VideoFFmpeg (HRESULT * hRslt) : VideoBase(),
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m_codec(NULL), m_formatCtx(NULL), m_codecCtx(NULL),
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m_frame(NULL), m_frameDeinterlaced(NULL), m_frameBGR(NULL), m_imgConvertCtx(NULL),
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m_deinterlace(false), m_preseek(0), m_videoStream(-1), m_baseFrameRate(25.0),
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m_lastFrame(-1), m_curPosition(-1), m_startTime(0),
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m_captWidth(0), m_captHeight(0), m_captRate(0.f)
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{
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// set video format
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m_format = RGB24;
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// force flip because ffmpeg always return the image in the wrong orientation for texture
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setFlip(true);
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// construction is OK
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*hRslt = S_OK;
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}
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// destructor
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VideoFFmpeg::~VideoFFmpeg ()
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{
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}
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// release components
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bool VideoFFmpeg::release()
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{
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// release
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if (m_codecCtx)
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{
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avcodec_close(m_codecCtx);
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}
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if (m_formatCtx)
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{
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av_close_input_file(m_formatCtx);
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}
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if (m_frame)
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{
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av_free(m_frame);
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}
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if (m_frameDeinterlaced)
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{
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MEM_freeN(m_frameDeinterlaced->data[0]);
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av_free(m_frameDeinterlaced);
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}
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if (m_frameBGR)
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{
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MEM_freeN(m_frameBGR->data[0]);
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av_free(m_frameBGR);
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}
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if (m_imgConvertCtx)
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{
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sws_freeContext(m_imgConvertCtx);
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}
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m_codec = NULL;
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m_codecCtx = NULL;
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m_formatCtx = NULL;
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m_frame = NULL;
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m_frame = NULL;
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m_frameBGR = NULL;
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m_imgConvertCtx = NULL;
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// object will be deleted after that
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return true;
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}
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// set initial parameters
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void VideoFFmpeg::initParams (short width, short height, float rate)
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{
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m_captWidth = width;
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m_captHeight = height;
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m_captRate = rate;
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}
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int VideoFFmpeg::openStream(const char *filename, AVInputFormat *inputFormat, AVFormatParameters *formatParams)
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{
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AVFormatContext *formatCtx;
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int i, videoStream;
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AVCodec *codec;
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AVCodecContext *codecCtx;
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if(av_open_input_file(&formatCtx, filename, inputFormat, 0, formatParams)!=0)
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return -1;
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if(av_find_stream_info(formatCtx)<0)
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{
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av_close_input_file(formatCtx);
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return -1;
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}
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/* Find the first video stream */
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videoStream=-1;
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for(i=0; i<formatCtx->nb_streams; i++)
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{
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if(formatCtx->streams[i] &&
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get_codec_from_stream(formatCtx->streams[i]) &&
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(get_codec_from_stream(formatCtx->streams[i])->codec_type==CODEC_TYPE_VIDEO))
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{
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videoStream=i;
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break;
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}
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}
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if(videoStream==-1)
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{
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av_close_input_file(formatCtx);
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return -1;
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}
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codecCtx = get_codec_from_stream(formatCtx->streams[videoStream]);
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/* Find the decoder for the video stream */
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codec=avcodec_find_decoder(codecCtx->codec_id);
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if(codec==NULL)
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{
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av_close_input_file(formatCtx);
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return -1;
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}
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codecCtx->workaround_bugs = 1;
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if(avcodec_open(codecCtx, codec)<0)
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{
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av_close_input_file(formatCtx);
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return -1;
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}
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#ifdef FFMPEG_OLD_FRAME_RATE
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if(codecCtx->frame_rate>1000 && codecCtx->frame_rate_base==1)
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codecCtx->frame_rate_base=1000;
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m_baseFrameRate = (double)codecCtx->frame_rate / (double)codecCtx->frame_rate_base;
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#else
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m_baseFrameRate = av_q2d(formatCtx->streams[videoStream]->r_frame_rate);
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#endif
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if (m_baseFrameRate <= 0.0)
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m_baseFrameRate = defFrameRate;
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m_codec = codec;
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m_codecCtx = codecCtx;
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m_formatCtx = formatCtx;
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m_videoStream = videoStream;
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m_frame = avcodec_alloc_frame();
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m_frameDeinterlaced = avcodec_alloc_frame();
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m_frameBGR = avcodec_alloc_frame();
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// allocate buffer if deinterlacing is required
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avpicture_fill((AVPicture*)m_frameDeinterlaced,
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(uint8_t*)MEM_callocN(avpicture_get_size(
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m_codecCtx->pix_fmt,
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m_codecCtx->width, m_codecCtx->height),
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"ffmpeg deinterlace"),
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m_codecCtx->pix_fmt, m_codecCtx->width, m_codecCtx->height);
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// allocate buffer to store final decoded frame
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avpicture_fill((AVPicture*)m_frameBGR,
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(uint8_t*)MEM_callocN(avpicture_get_size(
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PIX_FMT_BGR24,
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m_codecCtx->width, m_codecCtx->height),
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"ffmpeg bgr"),
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PIX_FMT_BGR24, m_codecCtx->width, m_codecCtx->height);
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// allocate sws context
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m_imgConvertCtx = sws_getContext(
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m_codecCtx->width,
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m_codecCtx->height,
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m_codecCtx->pix_fmt,
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m_codecCtx->width,
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m_codecCtx->height,
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PIX_FMT_BGR24,
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SWS_FAST_BILINEAR,
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NULL, NULL, NULL);
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if (!m_imgConvertCtx) {
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avcodec_close(m_codecCtx);
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av_close_input_file(m_formatCtx);
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av_free(m_frame);
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MEM_freeN(m_frameDeinterlaced->data[0]);
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av_free(m_frameDeinterlaced);
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MEM_freeN(m_frameBGR->data[0]);
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av_free(m_frameBGR);
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return -1;
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}
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return 0;
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}
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// open video file
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void VideoFFmpeg::openFile (char * filename)
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{
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do_init_ffmpeg();
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if (openStream(filename, NULL, NULL) != 0)
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return;
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if (m_codecCtx->gop_size)
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m_preseek = (m_codecCtx->gop_size < 25) ? m_codecCtx->gop_size+1 : 25;
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else if (m_codecCtx->has_b_frames)
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m_preseek = 25; // should determine gopsize
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else
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m_preseek = 0;
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// get video time range
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m_range[0] = 0.0;
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m_range[1] = (double)m_formatCtx->duration / AV_TIME_BASE;
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// open base class
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VideoBase::openFile(filename);
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if (
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#ifdef FFMPEG_PB_IS_POINTER
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m_formatCtx->pb->is_streamed
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#else
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m_formatCtx->pb.is_streamed
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#endif
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)
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{
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// the file is in fact a streaming source, prevent seeking
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m_isFile = false;
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// for streaming it is important to do non blocking read
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m_formatCtx->flags |= AVFMT_FLAG_NONBLOCK;
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}
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}
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// open video capture device
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void VideoFFmpeg::openCam (char * file, short camIdx)
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{
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// open camera source
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AVInputFormat *inputFormat;
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AVFormatParameters formatParams;
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AVRational frameRate;
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char *p, filename[28], rateStr[20];
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do_init_ffmpeg();
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memset(&formatParams, 0, sizeof(formatParams));
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#ifdef WIN32
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// video capture on windows only through Video For Windows driver
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inputFormat = av_find_input_format("vfwcap");
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if (!inputFormat)
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// Video For Windows not supported??
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return;
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sprintf(filename, "%d", camIdx);
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#else
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// In Linux we support two types of devices: VideoForLinux and DV1394.
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// the user specify it with the filename:
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// [<device_type>][:<standard>]
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// <device_type> : 'v4l' for VideoForLinux, 'dv1394' for DV1394. By default 'v4l'
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// <standard> : 'pal', 'secam' or 'ntsc'. By default 'ntsc'
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// The driver name is constructed automatically from the device type:
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// v4l : /dev/video<camIdx>
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// dv1394: /dev/dv1394/<camIdx>
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// If you have different driver name, you can specify the driver name explicitely
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// instead of device type. Examples of valid filename:
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// /dev/v4l/video0:pal
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// /dev/ieee1394/1:ntsc
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// dv1394:secam
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// v4l:pal
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if (file && strstr(file, "1394") != NULL)
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{
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// the user specifies a driver, check if it is v4l or d41394
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inputFormat = av_find_input_format("dv1394");
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sprintf(filename, "/dev/dv1394/%d", camIdx);
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} else
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{
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inputFormat = av_find_input_format("video4linux");
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sprintf(filename, "/dev/video%d", camIdx);
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}
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if (!inputFormat)
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// these format should be supported, check ffmpeg compilation
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return;
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if (file && strncmp(file, "/dev", 4) == 0)
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{
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// user does not specify a driver
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strncpy(filename, file, sizeof(filename));
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filename[sizeof(filename)-1] = 0;
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if ((p = strchr(filename, ':')) != 0)
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*p = 0;
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}
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if (file && (p = strchr(file, ':')) != NULL)
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formatParams.standard = p+1;
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#endif
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//frame rate
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if (m_captRate <= 0.f)
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m_captRate = defFrameRate;
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sprintf(rateStr, "%f", m_captRate);
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av_parse_video_frame_rate(&frameRate, rateStr);
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// populate format parameters
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// need to specify the time base = inverse of rate
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formatParams.time_base.num = frameRate.den;
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formatParams.time_base.den = frameRate.num;
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formatParams.width = m_captWidth;
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formatParams.height = m_captHeight;
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if (openStream(filename, inputFormat, &formatParams) != 0)
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return;
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// for video capture it is important to do non blocking read
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m_formatCtx->flags |= AVFMT_FLAG_NONBLOCK;
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// open base class
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VideoBase::openCam(file, camIdx);
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}
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// play video
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bool VideoFFmpeg::play (void)
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{
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try
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{
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// if object is able to play
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if (VideoBase::play())
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{
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// set video position
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setPositions();
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// return success
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return true;
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}
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}
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CATCH_EXCP;
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return false;
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}
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// stop video
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bool VideoFFmpeg::stop (void)
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{
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try
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{
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if (VideoBase::stop())
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{
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return true;
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}
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}
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CATCH_EXCP;
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return false;
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}
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// set video range
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void VideoFFmpeg::setRange (double start, double stop)
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{
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try
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{
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// set range
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VideoBase::setRange(start, stop);
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// set range for video
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setPositions();
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}
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CATCH_EXCP;
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}
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// set framerate
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void VideoFFmpeg::setFrameRate (float rate)
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{
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VideoBase::setFrameRate(rate);
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}
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// image calculation
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void VideoFFmpeg::calcImage (unsigned int texId)
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{
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loadFrame();
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}
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// load frame from video
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void VideoFFmpeg::loadFrame (void)
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{
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// get actual time
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double actTime = PIL_check_seconds_timer() - m_startTime;
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// if video has ended
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if (m_isFile && actTime * m_frameRate >= m_range[1])
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{
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// if repeats are set, decrease them
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if (m_repeat > 0)
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--m_repeat;
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// if video has to be replayed
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if (m_repeat != 0)
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{
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// reset its position
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actTime -= (m_range[1] - m_range[0]) / m_frameRate;
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m_startTime += (m_range[1] - m_range[0]) / m_frameRate;
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}
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// if video has to be stopped, stop it
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else
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m_status = SourceStopped;
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}
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// if video is playing
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if (m_status == SourcePlaying)
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{
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// actual frame
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long actFrame = m_isFile ? long(actTime * actFrameRate()) : m_lastFrame + 1;
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// if actual frame differs from last frame
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if (actFrame != m_lastFrame)
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{
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// get image
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if(grabFrame(actFrame))
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{
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AVFrame* frame = getFrame();
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// save actual frame
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m_lastFrame = actFrame;
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// init image, if needed
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init(short(m_codecCtx->width), short(m_codecCtx->height));
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// process image
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process((BYTE*)(frame->data[0]));
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}
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}
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}
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}
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// set actual position
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void VideoFFmpeg::setPositions (void)
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{
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// set video start time
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m_startTime = PIL_check_seconds_timer();
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// if file is played and actual position is before end position
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if (m_isFile && m_lastFrame >= 0 && m_lastFrame < m_range[1] * actFrameRate())
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// continue from actual position
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m_startTime -= double(m_lastFrame) / actFrameRate();
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else
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m_startTime -= m_range[0];
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}
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// position pointer in file, position in second
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bool VideoFFmpeg::grabFrame(long position)
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{
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AVPacket packet;
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int frameFinished;
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int posFound = 1;
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bool frameLoaded = false;
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long long targetTs = 0;
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// first check if the position that we are looking for is in the preseek range
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// if so, just read the frame until we get there
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if (position > m_curPosition + 1
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&& m_preseek
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&& position - (m_curPosition + 1) < m_preseek)
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{
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while(av_read_frame(m_formatCtx, &packet)>=0)
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{
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if (packet.stream_index == m_videoStream)
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{
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avcodec_decode_video(
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m_codecCtx,
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m_frame, &frameFinished,
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packet.data, packet.size);
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if (frameFinished)
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m_curPosition++;
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}
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av_free_packet(&packet);
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if (position == m_curPosition+1)
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break;
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}
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}
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// if the position is not in preseek, do a direct jump
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if (position != m_curPosition + 1) {
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double timeBase = av_q2d(m_formatCtx->streams[m_videoStream]->time_base);
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long long pos = (long long)
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((long long) (position - m_preseek) * AV_TIME_BASE / m_baseFrameRate);
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long long startTs = m_formatCtx->streams[m_videoStream]->start_time;
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if (pos < 0)
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pos = 0;
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if (startTs != AV_NOPTS_VALUE)
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pos += (long long)(startTs * AV_TIME_BASE * timeBase);
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av_seek_frame(m_formatCtx, -1, pos, AVSEEK_FLAG_BACKWARD);
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// current position is now lost, guess a value.
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// It's not important because it will be set at this end of this function
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m_curPosition = position - m_preseek - 1;
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// this is the timestamp of the frame we're looking for
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targetTs = (long long)(((double) position) / m_baseFrameRate / timeBase);
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if (startTs != AV_NOPTS_VALUE)
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targetTs += startTs;
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posFound = 0;
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avcodec_flush_buffers(m_codecCtx);
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}
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while(av_read_frame(m_formatCtx, &packet)>=0)
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{
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if(packet.stream_index == m_videoStream)
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{
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avcodec_decode_video(m_codecCtx,
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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 BGR24
|
|
sws_scale(m_imgConvertCtx,
|
|
input->data,
|
|
input->linesize,
|
|
0,
|
|
m_codecCtx->height,
|
|
m_frameBGR->data,
|
|
m_frameBGR->linesize);
|
|
av_free_packet(&packet);
|
|
frameLoaded = true;
|
|
break;
|
|
}
|
|
}
|
|
av_free_packet(&packet);
|
|
}
|
|
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
|
|
{"status", (getter)Video_getStatus, NULL, "video status", NULL},
|
|
{"range", (getter)Video_getRange, (setter)Video_setRange, "replay range", NULL},
|
|
{"repeat", (getter)Video_getRepeat, (setter)Video_setRepeat, "repeat count, -1 for infinite repeat", NULL},
|
|
{"framerate", (getter)Video_getFrameRate, (setter)Video_setFrameRate, "frame rate", NULL},
|
|
// attributes from ImageBase class
|
|
{"image", (getter)Image_getImage, NULL, "image data", NULL},
|
|
{"size", (getter)Image_getSize, NULL, "image size", NULL},
|
|
{"scale", (getter)Image_getScale, (setter)Image_setScale, "fast scale of image (near neighbour)", NULL},
|
|
{"flip", (getter)Image_getFlip, (setter)Image_setFlip, "flip image vertically", NULL},
|
|
{"filter", (getter)Image_getFilter, (setter)Image_setFilter, "pixel filter", NULL},
|
|
{"preseek", (getter)VideoFFmpeg_getPreseek, (setter)VideoFFmpeg_setPreseek, "nb of frames of preseek", NULL},
|
|
{"deinterlace", (getter)VideoFFmpeg_getDeinterlace, (setter)VideoFFmpeg_setDeinterlace, "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 */
|
|
};
|
|
|
|
|
|
|
|
#endif //WITH_FFMPEG
|
|
|
|
|