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Code style refactoring for ffmpeg wrappers

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This commit is contained in:
Alexander Reshetnikov 2012-04-09 15:38:37 +00:00
parent 3514042b29
commit d9e4ad3f50
2 changed files with 854 additions and 854 deletions
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706
modules/highgui/src/cap_ffmpeg_impl.hpp
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@ -245,7 +245,7 @@ void CvCapture_FFMPEG::init()
void CvCapture_FFMPEG::close() void CvCapture_FFMPEG::close()
{ {
if( picture ) if( picture )
av_free(picture); av_free(picture);
if( video_st ) if( video_st )
{ {
@ -316,13 +316,13 @@ bool CvCapture_FFMPEG::reopen()
} }
#ifndef AVSEEK_FLAG_FRAME #ifndef AVSEEK_FLAG_FRAME
#define AVSEEK_FLAG_FRAME 0 #define AVSEEK_FLAG_FRAME 0
#endif #endif
#ifndef AVSEEK_FLAG_ANY #ifndef AVSEEK_FLAG_ANY
#define AVSEEK_FLAG_ANY 1 #define AVSEEK_FLAG_ANY 1
#endif #endif
#ifndef SHORTER_DISTANCE_FOR_SEEK_TO_MAKE_IT_FASTER #ifndef SHORTER_DISTANCE_FOR_SEEK_TO_MAKE_IT_FASTER
#define SHORTER_DISTANCE_FOR_SEEK_TO_MAKE_IT_FASTER 25 #define SHORTER_DISTANCE_FOR_SEEK_TO_MAKE_IT_FASTER 25
#endif #endif
bool CvCapture_FFMPEG::open( const char* _filename ) bool CvCapture_FFMPEG::open( const char* _filename )
@ -358,24 +358,24 @@ bool CvCapture_FFMPEG::open( const char* _filename )
avcodec_thread_init(enc, get_number_of_cpus()); avcodec_thread_init(enc, get_number_of_cpus());
#if LIBAVFORMAT_BUILD < CALC_FFMPEG_VERSION(53, 2, 0) #if LIBAVFORMAT_BUILD < CALC_FFMPEG_VERSION(53, 2, 0)
#define AVMEDIA_TYPE_VIDEO CODEC_TYPE_VIDEO #define AVMEDIA_TYPE_VIDEO CODEC_TYPE_VIDEO
#endif #endif
if( AVMEDIA_TYPE_VIDEO == enc->codec_type && video_stream < 0) { if( AVMEDIA_TYPE_VIDEO == enc->codec_type && video_stream < 0) {
AVCodec *codec = avcodec_find_decoder(enc->codec_id); AVCodec *codec = avcodec_find_decoder(enc->codec_id);
if (!codec || if (!codec ||
avcodec_open(enc, codec) < 0) avcodec_open(enc, codec) < 0)
goto exit_func; goto exit_func;
video_stream = i; video_stream = i;
video_st = ic->streams[i]; video_st = ic->streams[i];
picture = avcodec_alloc_frame(); picture = avcodec_alloc_frame();
rgb_picture.data[0] = (uint8_t*)malloc( rgb_picture.data[0] = (uint8_t*)malloc(
avpicture_get_size( PIX_FMT_BGR24, avpicture_get_size( PIX_FMT_BGR24,
enc->width, enc->height )); enc->width, enc->height ));
avpicture_fill( (AVPicture*)&rgb_picture, rgb_picture.data[0], avpicture_fill( (AVPicture*)&rgb_picture, rgb_picture.data[0],
PIX_FMT_BGR24, enc->width, enc->height ); PIX_FMT_BGR24, enc->width, enc->height );
frame.width = enc->width; frame.width = enc->width;
frame.height = enc->height; frame.height = enc->height;
@ -406,7 +406,7 @@ bool CvCapture_FFMPEG::open( const char* _filename )
int flags = AVSEEK_FLAG_FRAME | AVSEEK_FLAG_BACKWARD; int flags = AVSEEK_FLAG_FRAME | AVSEEK_FLAG_BACKWARD;
av_seek_frame(ic, video_stream, ts, flags); av_seek_frame(ic, video_stream, ts, flags);
} }
exit_func: exit_func:
if( !valid ) if( !valid )
close(); close();
@ -445,22 +445,22 @@ bool CvCapture_FFMPEG::grabFrame()
break; break;
if( packet.stream_index != video_stream ) { if( packet.stream_index != video_stream ) {
av_free_packet (&packet); av_free_packet (&packet);
continue; continue;
} }
#if LIBAVFORMAT_BUILD >= CALC_FFMPEG_VERSION(53, 2, 0) #if LIBAVFORMAT_BUILD >= CALC_FFMPEG_VERSION(53, 2, 0)
avcodec_decode_video2(video_st->codec, picture, &got_picture, &packet); avcodec_decode_video2(video_st->codec, picture, &got_picture, &packet);
#else #else
#if LIBAVFORMAT_BUILD > 4628 #if LIBAVFORMAT_BUILD > 4628
avcodec_decode_video(video_st->codec, avcodec_decode_video(video_st->codec,
picture, &got_picture, picture, &got_picture,
packet.data, packet.size); packet.data, packet.size);
#else #else
avcodec_decode_video(&video_st->codec, avcodec_decode_video(&video_st->codec,
picture, &got_picture, picture, &got_picture,
packet.data, packet.size); packet.data, packet.size);
#endif #endif
#endif #endif
if (got_picture) { if (got_picture) {
@ -496,18 +496,18 @@ bool CvCapture_FFMPEG::retrieveFrame(int, unsigned char** data, int* step, int*
#endif #endif
#else #else
img_convert_ctx = sws_getContext(video_st->codec->width, img_convert_ctx = sws_getContext(video_st->codec->width,
video_st->codec->height, video_st->codec->height,
video_st->codec->pix_fmt, video_st->codec->pix_fmt,
video_st->codec->width, video_st->codec->width,
video_st->codec->height, video_st->codec->height,
PIX_FMT_BGR24, PIX_FMT_BGR24,
SWS_BICUBIC, SWS_BICUBIC,
NULL, NULL, NULL); NULL, NULL, NULL);
sws_scale(img_convert_ctx, picture->data, sws_scale(img_convert_ctx, picture->data,
picture->linesize, 0, picture->linesize, 0,
video_st->codec->height, video_st->codec->height,
rgb_picture.data, rgb_picture.linesize); rgb_picture.data, rgb_picture.linesize);
sws_freeContext(img_convert_ctx); sws_freeContext(img_convert_ctx);
#endif #endif
*data = frame.data; *data = frame.data;
@ -556,41 +556,41 @@ double CvCapture_FFMPEG::getProperty( int property_id )
break; break;
case CV_FFMPEG_CAP_PROP_FRAME_COUNT: case CV_FFMPEG_CAP_PROP_FRAME_COUNT:
{ {
int64_t nbf = ic->streams[video_stream]->nb_frames; int64_t nbf = ic->streams[video_stream]->nb_frames;
double eps = 0.000025; double eps = 0.000025;
if (nbf == 0) if (nbf == 0)
{
double fps = static_cast<double>(ic->streams[video_stream]->r_frame_rate.num) / static_cast<double>(ic->streams[video_stream]->r_frame_rate.den);
if (fps < eps)
{ {
fps = 1.0 / (static_cast<double>(ic->streams[video_stream]->codec->time_base.num) / static_cast<double>(ic->streams[video_stream]->codec->time_base.den)); double fps = static_cast<double>(ic->streams[video_stream]->r_frame_rate.num) / static_cast<double>(ic->streams[video_stream]->r_frame_rate.den);
if (fps < eps)
{
fps = 1.0 / (static_cast<double>(ic->streams[video_stream]->codec->time_base.num) / static_cast<double>(ic->streams[video_stream]->codec->time_base.den));
}
nbf = static_cast<int64_t>(round(ic->duration * fps) / AV_TIME_BASE);
} }
nbf = static_cast<int64_t>(round(ic->duration * fps) / AV_TIME_BASE); return nbf;
}
return nbf;
} }
break; break;
case CV_FFMPEG_CAP_PROP_FRAME_WIDTH: case CV_FFMPEG_CAP_PROP_FRAME_WIDTH:
return (double)frame.width; return (double)frame.width;
break; break;
case CV_FFMPEG_CAP_PROP_FRAME_HEIGHT: case CV_FFMPEG_CAP_PROP_FRAME_HEIGHT:
return (double)frame.height; return (double)frame.height;
break; break;
case CV_FFMPEG_CAP_PROP_FPS: case CV_FFMPEG_CAP_PROP_FPS:
#if LIBAVCODEC_BUILD > 4753 #if LIBAVCODEC_BUILD > 4753
return av_q2d (video_st->r_frame_rate); return av_q2d (video_st->r_frame_rate);
#else #else
return (double)video_st->codec.frame_rate return (double)video_st->codec.frame_rate
/ (double)video_st->codec.frame_rate_base; / (double)video_st->codec.frame_rate_base;
#endif #endif
break; break;
case CV_FFMPEG_CAP_PROP_FOURCC: case CV_FFMPEG_CAP_PROP_FOURCC:
#if LIBAVFORMAT_BUILD > 4628 #if LIBAVFORMAT_BUILD > 4628
return (double)video_st->codec->codec_tag; return (double)video_st->codec->codec_tag;
#else #else
return (double)video_st->codec.codec_tag; return (double)video_st->codec.codec_tag;
#endif #endif
break; break;
} }
return 0; return 0;
@ -617,24 +617,24 @@ bool CvCapture_FFMPEG::seekKeyAndRunOverFrames(int framenumber)
{ {
int ret; int ret;
if (framenumber > video_st->cur_dts-1) { if (framenumber > video_st->cur_dts-1) {
if (framenumber-(video_st->cur_dts-1) > SHORTER_DISTANCE_FOR_SEEK_TO_MAKE_IT_FASTER) { if (framenumber-(video_st->cur_dts-1) > SHORTER_DISTANCE_FOR_SEEK_TO_MAKE_IT_FASTER) {
ret = av_seek_frame(ic, video_stream, framenumber, 1); ret = av_seek_frame(ic, video_stream, framenumber, 1);
assert(ret >= 0); assert(ret >= 0);
if( ret < 0 ) if( ret < 0 )
return false; return false;
} }
grabFrame(); grabFrame();
while ((video_st->cur_dts-1) < framenumber) while ((video_st->cur_dts-1) < framenumber)
if ( !grabFrame() ) return false; if ( !grabFrame() ) return false;
} }
else if ( framenumber < (video_st->cur_dts-1) ) { else if ( framenumber < (video_st->cur_dts-1) ) {
ret=av_seek_frame(ic, video_stream, framenumber, 1); ret=av_seek_frame(ic, video_stream, framenumber, 1);
assert( ret >= 0 ); assert( ret >= 0 );
if( ret < 0 ) if( ret < 0 )
return false; return false;
grabFrame(); grabFrame();
while ((video_st->cur_dts-1) < framenumber ) while ((video_st->cur_dts-1) < framenumber )
if ( !grabFrame() ) return false; if ( !grabFrame() ) return false;
} }
return true; return true;
} }
@ -678,7 +678,7 @@ bool CvCapture_FFMPEG::setProperty( int property_id, double value )
if (!slowSeek((int)timestamp)) if (!slowSeek((int)timestamp))
{ {
fprintf(stderr, "HIGHGUI ERROR: AVI: could not (slow) seek to position %0.3f\n", fprintf(stderr, "HIGHGUI ERROR: AVI: could not (slow) seek to position %0.3f\n",
(double)timestamp / AV_TIME_BASE); (double)timestamp / AV_TIME_BASE);
return false; return false;
} }
} }
@ -686,7 +686,7 @@ bool CvCapture_FFMPEG::setProperty( int property_id, double value )
{ {
int flags = AVSEEK_FLAG_ANY; int flags = AVSEEK_FLAG_ANY;
if (timestamp < ic->streams[video_stream]->cur_dts) if (timestamp < ic->streams[video_stream]->cur_dts)
flags |= AVSEEK_FLAG_BACKWARD; flags |= AVSEEK_FLAG_BACKWARD;
int ret = av_seek_frame(ic, video_stream, timestamp, flags); int ret = av_seek_frame(ic, video_stream, timestamp, flags);
if (ret < 0) if (ret < 0)
{ {
@ -710,7 +710,7 @@ bool CvCapture_FFMPEG::setProperty( int property_id, double value )
struct CvVideoWriter_FFMPEG struct CvVideoWriter_FFMPEG
{ {
bool open( const char* filename, int fourcc, bool open( const char* filename, int fourcc,
double fps, int width, int height, bool isColor ); double fps, int width, int height, bool isColor );
void close(); void close();
bool writeFrame( const unsigned char* data, int step, int width, int height, int cn, int origin ); bool writeFrame( const unsigned char* data, int step, int width, int height, int cn, int origin );
@ -736,34 +736,34 @@ static const char * icvFFMPEGErrStr(int err)
{ {
#if LIBAVFORMAT_BUILD >= CALC_FFMPEG_VERSION(53, 2, 0) #if LIBAVFORMAT_BUILD >= CALC_FFMPEG_VERSION(53, 2, 0)
switch(err) { switch(err) {
case AVERROR_BSF_NOT_FOUND: case AVERROR_BSF_NOT_FOUND:
return "Bitstream filter not found"; return "Bitstream filter not found";
case AVERROR_DECODER_NOT_FOUND: case AVERROR_DECODER_NOT_FOUND:
return "Decoder not found"; return "Decoder not found";
case AVERROR_DEMUXER_NOT_FOUND: case AVERROR_DEMUXER_NOT_FOUND:
return "Demuxer not found"; return "Demuxer not found";
case AVERROR_ENCODER_NOT_FOUND: case AVERROR_ENCODER_NOT_FOUND:
return "Encoder not found"; return "Encoder not found";
case AVERROR_EOF: case AVERROR_EOF:
return "End of file"; return "End of file";
case AVERROR_EXIT: case AVERROR_EXIT:
return "Immediate exit was requested; the called function should not be restarted"; return "Immediate exit was requested; the called function should not be restarted";
case AVERROR_FILTER_NOT_FOUND: case AVERROR_FILTER_NOT_FOUND:
return "Filter not found"; return "Filter not found";
case AVERROR_INVALIDDATA: case AVERROR_INVALIDDATA:
return "Invalid data found when processing input"; return "Invalid data found when processing input";
case AVERROR_MUXER_NOT_FOUND: case AVERROR_MUXER_NOT_FOUND:
return "Muxer not found"; return "Muxer not found";
case AVERROR_OPTION_NOT_FOUND: case AVERROR_OPTION_NOT_FOUND:
return "Option not found"; return "Option not found";
case AVERROR_PATCHWELCOME: case AVERROR_PATCHWELCOME:
return "Not yet implemented in FFmpeg, patches welcome"; return "Not yet implemented in FFmpeg, patches welcome";
case AVERROR_PROTOCOL_NOT_FOUND: case AVERROR_PROTOCOL_NOT_FOUND:
return "Protocol not found"; return "Protocol not found";
case AVERROR_STREAM_NOT_FOUND: case AVERROR_STREAM_NOT_FOUND:
return "Stream not found"; return "Stream not found";
default: default:
break; break;
} }
#else #else
switch(err) { switch(err) {
@ -830,7 +830,7 @@ static AVFrame * icv_alloc_picture_FFMPEG(int pix_fmt, int width, int height, bo
return NULL; return NULL;
} }
avpicture_fill((AVPicture *)picture, picture_buf, avpicture_fill((AVPicture *)picture, picture_buf,
(PixelFormat) pix_fmt, width, height); (PixelFormat) pix_fmt, width, height);
} }
else { else {
} }
@ -887,11 +887,11 @@ static AVStream *icv_add_video_stream_FFMPEG(AVFormatContext *oc,
of which frame timestamps are represented. for fixed-fps content, of which frame timestamps are represented. for fixed-fps content,
timebase should be 1/framerate and timestamp increments should be timebase should be 1/framerate and timestamp increments should be
identically 1. */ identically 1. */
frame_rate = static_cast<int>(fps+0.5); frame_rate = static_cast<int>(fps+0.5);
frame_rate_base = 1; frame_rate_base = 1;
while (fabs(static_cast<double>(frame_rate)/frame_rate_base) - fps > 0.001){ while (fabs(static_cast<double>(frame_rate)/frame_rate_base) - fps > 0.001){
frame_rate_base *= 10; frame_rate_base *= 10;
frame_rate = static_cast<int>(fps*frame_rate_base + 0.5); frame_rate = static_cast<int>(fps*frame_rate_base + 0.5);
} }
#if LIBAVFORMAT_BUILD > 4752 #if LIBAVFORMAT_BUILD > 4752
c->time_base.den = frame_rate; c->time_base.den = frame_rate;
@ -959,9 +959,9 @@ int icv_av_write_frame_FFMPEG( AVFormatContext * oc, AVStream * video_st, uint8_
AVPacket pkt; AVPacket pkt;
av_init_packet(&pkt); av_init_packet(&pkt);
#ifndef PKT_FLAG_KEY #ifndef PKT_FLAG_KEY
#define PKT_FLAG_KEY AV_PKT_FLAG_KEY #define PKT_FLAG_KEY AV_PKT_FLAG_KEY
#endif #endif
pkt.flags |= PKT_FLAG_KEY; pkt.flags |= PKT_FLAG_KEY;
pkt.stream_index= video_st->index; pkt.stream_index= video_st->index;
@ -979,7 +979,7 @@ int icv_av_write_frame_FFMPEG( AVFormatContext * oc, AVStream * video_st, uint8_
#if LIBAVFORMAT_BUILD > 4752 #if LIBAVFORMAT_BUILD > 4752
if(c->coded_frame->pts != (int64_t)AV_NOPTS_VALUE) if(c->coded_frame->pts != (int64_t)AV_NOPTS_VALUE)
pkt.pts = av_rescale_q(c->coded_frame->pts, c->time_base, video_st->time_base); pkt.pts = av_rescale_q(c->coded_frame->pts, c->time_base, video_st->time_base);
#else #else
pkt.pts = c->coded_frame->pts; pkt.pts = c->coded_frame->pts;
#endif #endif
@ -1067,7 +1067,7 @@ bool CvVideoWriter_FFMPEG::writeFrame( const unsigned char* data, int step, int
} }
// check if buffer sizes match, i.e. image has expected format (size, channels, bitdepth, alignment) // check if buffer sizes match, i.e. image has expected format (size, channels, bitdepth, alignment)
/*#if LIBAVCODEC_VERSION_INT >= ((52<<16)+(37<<8)+0) /*#if LIBAVCODEC_VERSION_INT >= ((52<<16)+(37<<8)+0)
assert (image->imageSize == avpicture_get_size( (PixelFormat)input_pix_fmt, image->width, image->height )); assert (image->imageSize == avpicture_get_size( (PixelFormat)input_pix_fmt, image->width, image->height ));
#else #else
assert (image->imageSize == avpicture_get_size( input_pix_fmt, image->width, image->height )); assert (image->imageSize == avpicture_get_size( input_pix_fmt, image->width, image->height ));
@ -1077,38 +1077,38 @@ bool CvVideoWriter_FFMPEG::writeFrame( const unsigned char* data, int step, int
assert( input_picture ); assert( input_picture );
// let input_picture point to the raw data buffer of 'image' // let input_picture point to the raw data buffer of 'image'
avpicture_fill((AVPicture *)input_picture, (uint8_t *) data, avpicture_fill((AVPicture *)input_picture, (uint8_t *) data,
(PixelFormat)input_pix_fmt, width, height); (PixelFormat)input_pix_fmt, width, height);
#if !defined(HAVE_FFMPEG_SWSCALE) #if !defined(HAVE_FFMPEG_SWSCALE)
// convert to the color format needed by the codec // convert to the color format needed by the codec
if( img_convert((AVPicture *)picture, c->pix_fmt, if( img_convert((AVPicture *)picture, c->pix_fmt,
(AVPicture *)input_picture, (PixelFormat)input_pix_fmt, (AVPicture *)input_picture, (PixelFormat)input_pix_fmt,
width, height) < 0){ width, height) < 0){
return false; return false;
} }
#else #else
img_convert_ctx = sws_getContext(width, img_convert_ctx = sws_getContext(width,
height, height,
(PixelFormat)input_pix_fmt, (PixelFormat)input_pix_fmt,
c->width, c->width,
c->height, c->height,
c->pix_fmt, c->pix_fmt,
SWS_BICUBIC, SWS_BICUBIC,
NULL, NULL, NULL); NULL, NULL, NULL);
if ( sws_scale(img_convert_ctx, input_picture->data, if ( sws_scale(img_convert_ctx, input_picture->data,
input_picture->linesize, 0, input_picture->linesize, 0,
height, height,
picture->data, picture->linesize) < 0 ) picture->data, picture->linesize) < 0 )
{ {
return false; return false;
} }
sws_freeContext(img_convert_ctx); sws_freeContext(img_convert_ctx);
#endif #endif
} }
else{ else{
avpicture_fill((AVPicture *)picture, (uint8_t *) data, avpicture_fill((AVPicture *)picture, (uint8_t *) data,
(PixelFormat)input_pix_fmt, width, height); (PixelFormat)input_pix_fmt, width, height);
} }
ret = icv_av_write_frame_FFMPEG( oc, video_st, outbuf, outbuf_size, picture) >= 0; ret = icv_av_write_frame_FFMPEG( oc, video_st, outbuf, outbuf_size, picture) >= 0;
@ -1137,306 +1137,306 @@ void CvVideoWriter_FFMPEG::close()
#if LIBAVFORMAT_BUILD > 4628 #if LIBAVFORMAT_BUILD > 4628
if( video_st->codec->pix_fmt != input_pix_fmt){ if( video_st->codec->pix_fmt != input_pix_fmt){
#else #else
if( video_st->codec.pix_fmt != input_pix_fmt){ if( video_st->codec.pix_fmt != input_pix_fmt){
#endif #endif
if(picture->data[0]) if(picture->data[0])
free(picture->data[0]); free(picture->data[0]);
picture->data[0] = 0; picture->data[0] = 0;
} }
av_free(picture); av_free(picture);
if (input_picture) { if (input_picture) {
av_free(input_picture); av_free(input_picture);
} }
/* close codec */ /* close codec */
#if LIBAVFORMAT_BUILD > 4628 #if LIBAVFORMAT_BUILD > 4628
avcodec_close(video_st->codec); avcodec_close(video_st->codec);
#else #else
avcodec_close(&(video_st->codec)); avcodec_close(&(video_st->codec));
#endif #endif
av_free(outbuf); av_free(outbuf);
/* free the streams */ /* free the streams */
for(i = 0; i < oc->nb_streams; i++) { for(i = 0; i < oc->nb_streams; i++) {
av_freep(&oc->streams[i]->codec); av_freep(&oc->streams[i]->codec);
av_freep(&oc->streams[i]); av_freep(&oc->streams[i]);
} }
if (!(fmt->flags & AVFMT_NOFILE)) { if (!(fmt->flags & AVFMT_NOFILE)) {
/* close the output file */ /* close the output file */
#if LIBAVCODEC_VERSION_INT >= ((51<<16)+(49<<8)+0) #if LIBAVCODEC_VERSION_INT >= ((51<<16)+(49<<8)+0)
url_fclose(oc->pb); url_fclose(oc->pb);
#else #else
url_fclose(&oc->pb); url_fclose(&oc->pb);
#endif #endif
} }
/* free the stream */ /* free the stream */
av_free(oc); av_free(oc);
if( temp_image.data ) if( temp_image.data )
{ {
free(temp_image.data); free(temp_image.data);
temp_image.data = 0; temp_image.data = 0;
}
init();
} }
init(); /// Create a video writer object that uses FFMPEG
} bool CvVideoWriter_FFMPEG::open( const char * filename, int fourcc,
double fps, int width, int height, bool is_color )
/// Create a video writer object that uses FFMPEG {
bool CvVideoWriter_FFMPEG::open( const char * filename, int fourcc, CodecID codec_id = CODEC_ID_NONE;
double fps, int width, int height, bool is_color )
{
CodecID codec_id = CODEC_ID_NONE;
int err, codec_pix_fmt, bitrate_scale = 64; int err, codec_pix_fmt, bitrate_scale = 64;
close(); close();
// check arguments // check arguments
assert(filename); assert(filename);
assert(fps > 0); assert(fps > 0);
assert(width > 0 && height > 0); assert(width > 0 && height > 0);
// tell FFMPEG to register codecs // tell FFMPEG to register codecs
av_register_all(); av_register_all();
/* auto detect the output format from the name and fourcc code. */ /* auto detect the output format from the name and fourcc code. */
#if LIBAVFORMAT_BUILD >= CALC_FFMPEG_VERSION(53, 2, 0) #if LIBAVFORMAT_BUILD >= CALC_FFMPEG_VERSION(53, 2, 0)
fmt = av_guess_format(NULL, filename, NULL); fmt = av_guess_format(NULL, filename, NULL);
#else #else
fmt = guess_format(NULL, filename, NULL); fmt = guess_format(NULL, filename, NULL);
#endif #endif
if (!fmt)
return false;
/* determine optimal pixel format */ if (!fmt)
if (is_color) { return false;
input_pix_fmt = PIX_FMT_BGR24;
}
else {
input_pix_fmt = PIX_FMT_GRAY8;
}
/* Lookup codec_id for given fourcc */ /* determine optimal pixel format */
if (is_color) {
input_pix_fmt = PIX_FMT_BGR24;
}
else {
input_pix_fmt = PIX_FMT_GRAY8;
}
/* Lookup codec_id for given fourcc */
#if LIBAVCODEC_VERSION_INT<((51<<16)+(49<<8)+0) #if LIBAVCODEC_VERSION_INT<((51<<16)+(49<<8)+0)
if( (codec_id = codec_get_bmp_id( fourcc )) == CODEC_ID_NONE ) if( (codec_id = codec_get_bmp_id( fourcc )) == CODEC_ID_NONE )
return false; return false;
#else #else
const struct AVCodecTag * tags[] = { codec_bmp_tags, NULL}; const struct AVCodecTag * tags[] = { codec_bmp_tags, NULL};
if( (codec_id = av_codec_get_id(tags, fourcc)) == CODEC_ID_NONE ) if( (codec_id = av_codec_get_id(tags, fourcc)) == CODEC_ID_NONE )
return false; return false;
#endif #endif
// alloc memory for context // alloc memory for context
#if LIBAVFORMAT_BUILD >= CALC_FFMPEG_VERSION(53, 2, 0) #if LIBAVFORMAT_BUILD >= CALC_FFMPEG_VERSION(53, 2, 0)
oc = avformat_alloc_context(); oc = avformat_alloc_context();
#else #else
oc = av_alloc_format_context(); oc = av_alloc_format_context();
#endif #endif
assert (oc); assert (oc);
/* set file name */ /* set file name */
oc->oformat = fmt; oc->oformat = fmt;
snprintf(oc->filename, sizeof(oc->filename), "%s", filename); snprintf(oc->filename, sizeof(oc->filename), "%s", filename);
/* set some options */ /* set some options */
oc->max_delay = (int)(0.7*AV_TIME_BASE); /* This reduces buffer underrun warnings with MPEG */ oc->max_delay = (int)(0.7*AV_TIME_BASE); /* This reduces buffer underrun warnings with MPEG */
// set a few optimal pixel formats for lossless codecs of interest.. // set a few optimal pixel formats for lossless codecs of interest..
switch (codec_id) { switch (codec_id) {
#if LIBAVCODEC_VERSION_INT>((50<<16)+(1<<8)+0) #if LIBAVCODEC_VERSION_INT>((50<<16)+(1<<8)+0)
case CODEC_ID_JPEGLS: case CODEC_ID_JPEGLS:
// BGR24 or GRAY8 depending on is_color... // BGR24 or GRAY8 depending on is_color...
codec_pix_fmt = input_pix_fmt; codec_pix_fmt = input_pix_fmt;
break; break;
#endif #endif
case CODEC_ID_HUFFYUV: case CODEC_ID_HUFFYUV:
codec_pix_fmt = PIX_FMT_YUV422P; codec_pix_fmt = PIX_FMT_YUV422P;
break; break;
case CODEC_ID_MJPEG: case CODEC_ID_MJPEG:
case CODEC_ID_LJPEG: case CODEC_ID_LJPEG:
codec_pix_fmt = PIX_FMT_YUVJ420P; codec_pix_fmt = PIX_FMT_YUVJ420P;
bitrate_scale = 128; bitrate_scale = 128;
break; break;
case CODEC_ID_RAWVIDEO: case CODEC_ID_RAWVIDEO:
codec_pix_fmt = input_pix_fmt == PIX_FMT_GRAY8 || codec_pix_fmt = input_pix_fmt == PIX_FMT_GRAY8 ||
input_pix_fmt == PIX_FMT_GRAY16LE || input_pix_fmt == PIX_FMT_GRAY16LE ||
input_pix_fmt == PIX_FMT_GRAY16BE ? input_pix_fmt : PIX_FMT_YUV420P; input_pix_fmt == PIX_FMT_GRAY16BE ? input_pix_fmt : PIX_FMT_YUV420P;
break; break;
default: default:
// good for lossy formats, MPEG, etc. // good for lossy formats, MPEG, etc.
codec_pix_fmt = PIX_FMT_YUV420P; codec_pix_fmt = PIX_FMT_YUV420P;
break; break;
} }
// TODO -- safe to ignore output audio stream? // TODO -- safe to ignore output audio stream?
video_st = icv_add_video_stream_FFMPEG(oc, codec_id, video_st = icv_add_video_stream_FFMPEG(oc, codec_id,
width, height, width*height*bitrate_scale, width, height, width*height*bitrate_scale,
fps, codec_pix_fmt); fps, codec_pix_fmt);
/* set the output parameters (must be done even if no /* set the output parameters (must be done even if no
parameters). */ parameters). */
if (av_set_parameters(oc, NULL) < 0) { if (av_set_parameters(oc, NULL) < 0) {
return false; return false;
} }
dump_format(oc, 0, filename, 1); dump_format(oc, 0, filename, 1);
/* now that all the parameters are set, we can open the audio and /* now that all the parameters are set, we can open the audio and
video codecs and allocate the necessary encode buffers */ video codecs and allocate the necessary encode buffers */
if (!video_st){ if (!video_st){
return false; return false;
} }
AVCodec *codec; AVCodec *codec;
AVCodecContext *c; AVCodecContext *c;
#if LIBAVFORMAT_BUILD > 4628 #if LIBAVFORMAT_BUILD > 4628
c = (video_st->codec); c = (video_st->codec);
#else #else
c = &(video_st->codec); c = &(video_st->codec);
#endif #endif
c->codec_tag = fourcc; c->codec_tag = fourcc;
/* find the video encoder */ /* find the video encoder */
codec = avcodec_find_encoder(c->codec_id); codec = avcodec_find_encoder(c->codec_id);
if (!codec) { if (!codec) {
return false; return false;
} }
c->bit_rate_tolerance = c->bit_rate; c->bit_rate_tolerance = c->bit_rate;
/* open the codec */ /* open the codec */
if ( (err=avcodec_open(c, codec)) < 0) { if ( (err=avcodec_open(c, codec)) < 0) {
char errtext[256]; char errtext[256];
sprintf(errtext, "Could not open codec '%s': %s", codec->name, icvFFMPEGErrStr(err)); sprintf(errtext, "Could not open codec '%s': %s", codec->name, icvFFMPEGErrStr(err));
return false; return false;
} }
outbuf = NULL; outbuf = NULL;
if (!(oc->oformat->flags & AVFMT_RAWPICTURE)) { if (!(oc->oformat->flags & AVFMT_RAWPICTURE)) {
/* allocate output buffer */ /* allocate output buffer */
/* assume we will never get codec output with more than 4 bytes per pixel... */ /* assume we will never get codec output with more than 4 bytes per pixel... */
outbuf_size = width*height*4; outbuf_size = width*height*4;
outbuf = (uint8_t *) av_malloc(outbuf_size); outbuf = (uint8_t *) av_malloc(outbuf_size);
} }
bool need_color_convert; bool need_color_convert;
need_color_convert = (c->pix_fmt != input_pix_fmt); need_color_convert = (c->pix_fmt != input_pix_fmt);
/* allocate the encoded raw picture */ /* allocate the encoded raw picture */
picture = icv_alloc_picture_FFMPEG(c->pix_fmt, c->width, c->height, need_color_convert); picture = icv_alloc_picture_FFMPEG(c->pix_fmt, c->width, c->height, need_color_convert);
if (!picture) { if (!picture) {
return false; return false;
} }
/* if the output format is not our input format, then a temporary /* if the output format is not our input format, then a temporary
picture of the input format is needed too. It is then converted picture of the input format is needed too. It is then converted
to the required output format */ to the required output format */
input_picture = NULL; input_picture = NULL;
if ( need_color_convert ) { if ( need_color_convert ) {
input_picture = icv_alloc_picture_FFMPEG(input_pix_fmt, c->width, c->height, false); input_picture = icv_alloc_picture_FFMPEG(input_pix_fmt, c->width, c->height, false);
if (!input_picture) { if (!input_picture) {
return false; return false;
}
}
/* open the output file, if needed */
if (!(fmt->flags & AVFMT_NOFILE)) {
if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0) {
return false;
}
}
/* write the stream header, if any */
av_write_header( oc );
return true;
}
CvCapture_FFMPEG* cvCreateFileCapture_FFMPEG( const char* filename )
{
CvCapture_FFMPEG* capture = (CvCapture_FFMPEG*)malloc(sizeof(*capture));
capture->init();
if( capture->open( filename ))
return capture;
capture->close();
free(capture);
return 0;
}
void cvReleaseCapture_FFMPEG(CvCapture_FFMPEG** capture)
{
if( capture && *capture )
{
(*capture)->close();
free(*capture);
*capture = 0;
} }
} }
/* open the output file, if needed */ int cvSetCaptureProperty_FFMPEG(CvCapture_FFMPEG* capture, int prop_id, double value)
if (!(fmt->flags & AVFMT_NOFILE)) { {
if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0) { return capture->setProperty(prop_id, value);
return false; }
double cvGetCaptureProperty_FFMPEG(CvCapture_FFMPEG* capture, int prop_id)
{
return capture->getProperty(prop_id);
}
int cvGrabFrame_FFMPEG(CvCapture_FFMPEG* capture)
{
return capture->grabFrame();
}
int cvRetrieveFrame_FFMPEG(CvCapture_FFMPEG* capture, unsigned char** data, int* step, int* width, int* height, int* cn)
{
return capture->retrieveFrame(0, data, step, width, height, cn);
}
CvVideoWriter_FFMPEG* cvCreateVideoWriter_FFMPEG( const char* filename, int fourcc, double fps,
int width, int height, int isColor )
{
CvVideoWriter_FFMPEG* writer = (CvVideoWriter_FFMPEG*)malloc(sizeof(*writer));
writer->init();
if( writer->open( filename, fourcc, fps, width, height, isColor != 0 ))
return writer;
writer->close();
free(writer);
return 0;
}
void cvReleaseVideoWriter_FFMPEG( CvVideoWriter_FFMPEG** writer )
{
if( writer && *writer )
{
(*writer)->close();
free(*writer);
*writer = 0;
} }
} }
/* write the stream header, if any */
av_write_header( oc );
return true; int cvWriteFrame_FFMPEG( CvVideoWriter_FFMPEG* writer,
} const unsigned char* data, int step,
int width, int height, int cn, int origin)
CvCapture_FFMPEG* cvCreateFileCapture_FFMPEG( const char* filename )
{
CvCapture_FFMPEG* capture = (CvCapture_FFMPEG*)malloc(sizeof(*capture));
capture->init();
if( capture->open( filename ))
return capture;
capture->close();
free(capture);
return 0;
}
void cvReleaseCapture_FFMPEG(CvCapture_FFMPEG** capture)
{
if( capture && *capture )
{ {
(*capture)->close(); return writer->writeFrame(data, step, width, height, cn, origin);
free(*capture);
*capture = 0;
} }
}
int cvSetCaptureProperty_FFMPEG(CvCapture_FFMPEG* capture, int prop_id, double value)
{
return capture->setProperty(prop_id, value);
}
double cvGetCaptureProperty_FFMPEG(CvCapture_FFMPEG* capture, int prop_id)
{
return capture->getProperty(prop_id);
}
int cvGrabFrame_FFMPEG(CvCapture_FFMPEG* capture)
{
return capture->grabFrame();
}
int cvRetrieveFrame_FFMPEG(CvCapture_FFMPEG* capture, unsigned char** data, int* step, int* width, int* height, int* cn)
{
return capture->retrieveFrame(0, data, step, width, height, cn);
}
CvVideoWriter_FFMPEG* cvCreateVideoWriter_FFMPEG( const char* filename, int fourcc, double fps,
int width, int height, int isColor )
{
CvVideoWriter_FFMPEG* writer = (CvVideoWriter_FFMPEG*)malloc(sizeof(*writer));
writer->init();
if( writer->open( filename, fourcc, fps, width, height, isColor != 0 ))
return writer;
writer->close();
free(writer);
return 0;
}
void cvReleaseVideoWriter_FFMPEG( CvVideoWriter_FFMPEG** writer )
{
if( writer && *writer )
{
(*writer)->close();
free(*writer);
*writer = 0;
}
}
int cvWriteFrame_FFMPEG( CvVideoWriter_FFMPEG* writer,
const unsigned char* data, int step,
int width, int height, int cn, int origin)
{
return writer->writeFrame(data, step, width, height, cn, origin);
}

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modules/highgui/src/cap_ffmpeg_impl_v2.hpp
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