mirror of
https://github.com/mpv-player/mpv
synced 2024-12-24 07:42:17 +00:00
f0223e1b83
Naturally, there's more than one fourcc that indicates an mjpeg stream. I have a particular ancient webcam here (Logitech QuickCam Messanger) that only supports the single 'JPEG' format, but there are other devices out there which support both 'JPEG' and 'MJPG' with no visible differences, and others where the streams are slightly different. Regardless of those details, it remains correct to treat 'JPEG' the same as 'MJPG' from a stream consumption perspective.
94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MPLAYER_TVI_DEF_H
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#define MPLAYER_TVI_DEF_H
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#include <stdlib.h> /* malloc */
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#include <string.h> /* memset */
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#include "tv.h"
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static int init(priv_t *priv);
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static int uninit(priv_t *priv);
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static int do_control(priv_t *priv, int cmd, void *arg);
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static int start(priv_t *priv);
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static double grab_video_frame(priv_t *priv, char *buffer, int len);
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static int get_video_framesize(priv_t *priv);
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static double grab_audio_frame(priv_t *priv, char *buffer, int len);
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static int get_audio_framesize(priv_t *priv);
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static const tvi_functions_t functions =
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{
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init,
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uninit,
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do_control,
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start,
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grab_video_frame,
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get_video_framesize,
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grab_audio_frame,
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get_audio_framesize
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};
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/**
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Fills video frame in given buffer with blue color for yv12,i420,uyvy,yuy2.
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Other formats will be filled with 0xC0
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*/
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static inline void fill_blank_frame(char* buffer,int len,int fmt){
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int i;
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// RGB(0,0,255) <-> YVU(41,110,240)
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switch(fmt){
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case MP_FOURCC_YV12:
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memset(buffer, 41,4*len/6); //Y
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memset(buffer+4*len/6, 110,len/6);//V
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memset(buffer+5*len/6, 240,len/6);//U
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break;
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case MP_FOURCC_I420:
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memset(buffer, 41,4*len/6); //Y
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memset(buffer+4*len/6, 240,len/6);//U
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memset(buffer+5*len/6, 110,len/6);//V
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break;
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case MP_FOURCC_UYVY:
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for(i=0;i<len;i+=4){
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buffer[i]=0xFF;
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buffer[i+1]=0;
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buffer[i+2]=0;
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buffer[i+3]=0;
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}
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break;
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case MP_FOURCC_YUY2:
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for(i=0;i<len;i+=4){
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buffer[i]=0;
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buffer[i+1]=0xFF;
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buffer[i+2]=0;
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buffer[i+3]=0;
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}
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break;
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case MP_FOURCC_MJPEG:
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case MP_FOURCC_JPEG:
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/*
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This is compressed format. I don't know yet how to fill such frame with blue color.
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Keeping frame unchanged.
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*/
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break;
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default:
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memset(buffer,0xC0,len);
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}
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}
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#endif /* MPLAYER_TVI_DEF_H */
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