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Rev | Author | Line No. | Line |
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4349 | Serge | 1 | /* |
2 | * VFW capture interface |
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3 | * Copyright (c) 2006-2008 Ramiro Polla |
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4 | * |
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5 | * This file is part of FFmpeg. |
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6 | * |
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7 | * FFmpeg is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU Lesser General Public |
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9 | * License as published by the Free Software Foundation; either |
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10 | * version 2.1 of the License, or (at your option) any later version. |
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11 | * |
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12 | * FFmpeg is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 | * Lesser General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU Lesser General Public |
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18 | * License along with FFmpeg; if not, write to the Free Software |
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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20 | */ |
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21 | |||
22 | #include "libavformat/internal.h" |
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23 | #include "libavutil/log.h" |
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24 | #include "libavutil/opt.h" |
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25 | #include "libavutil/parseutils.h" |
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26 | #include |
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27 | #include |
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28 | #include "avdevice.h" |
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29 | |||
30 | /* Defines for VFW missing from MinGW. |
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31 | * Remove this when MinGW incorporates them. */ |
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32 | #define HWND_MESSAGE ((HWND)-3) |
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33 | |||
34 | /* End of missing MinGW defines */ |
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35 | |||
36 | struct vfw_ctx { |
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37 | const AVClass *class; |
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38 | HWND hwnd; |
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39 | HANDLE mutex; |
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40 | HANDLE event; |
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41 | AVPacketList *pktl; |
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42 | unsigned int curbufsize; |
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43 | unsigned int frame_num; |
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44 | char *video_size; /**< A string describing video size, set by a private option. */ |
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45 | char *framerate; /**< Set by a private option. */ |
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46 | }; |
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47 | |||
48 | static enum AVPixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount) |
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49 | { |
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50 | switch(biCompression) { |
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51 | case MKTAG('U', 'Y', 'V', 'Y'): |
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52 | return AV_PIX_FMT_UYVY422; |
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53 | case MKTAG('Y', 'U', 'Y', '2'): |
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54 | return AV_PIX_FMT_YUYV422; |
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55 | case MKTAG('I', '4', '2', '0'): |
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56 | return AV_PIX_FMT_YUV420P; |
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57 | case BI_RGB: |
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58 | switch(biBitCount) { /* 1-8 are untested */ |
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59 | case 1: |
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60 | return AV_PIX_FMT_MONOWHITE; |
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61 | case 4: |
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62 | return AV_PIX_FMT_RGB4; |
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63 | case 8: |
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64 | return AV_PIX_FMT_RGB8; |
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65 | case 16: |
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66 | return AV_PIX_FMT_RGB555; |
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67 | case 24: |
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68 | return AV_PIX_FMT_BGR24; |
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69 | case 32: |
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70 | return AV_PIX_FMT_RGB32; |
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71 | } |
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72 | } |
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73 | return AV_PIX_FMT_NONE; |
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74 | } |
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75 | |||
76 | static enum AVCodecID vfw_codecid(DWORD biCompression) |
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77 | { |
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78 | switch(biCompression) { |
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79 | case MKTAG('d', 'v', 's', 'd'): |
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80 | return AV_CODEC_ID_DVVIDEO; |
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81 | case MKTAG('M', 'J', 'P', 'G'): |
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82 | case MKTAG('m', 'j', 'p', 'g'): |
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83 | return AV_CODEC_ID_MJPEG; |
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84 | } |
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85 | return AV_CODEC_ID_NONE; |
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86 | } |
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87 | |||
88 | #define dstruct(pctx, sname, var, type) \ |
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89 | av_log(pctx, AV_LOG_DEBUG, #var":\t%"type"\n", sname->var) |
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90 | |||
91 | static void dump_captureparms(AVFormatContext *s, CAPTUREPARMS *cparms) |
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92 | { |
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93 | av_log(s, AV_LOG_DEBUG, "CAPTUREPARMS\n"); |
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94 | dstruct(s, cparms, dwRequestMicroSecPerFrame, "lu"); |
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95 | dstruct(s, cparms, fMakeUserHitOKToCapture, "d"); |
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96 | dstruct(s, cparms, wPercentDropForError, "u"); |
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97 | dstruct(s, cparms, fYield, "d"); |
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98 | dstruct(s, cparms, dwIndexSize, "lu"); |
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99 | dstruct(s, cparms, wChunkGranularity, "u"); |
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100 | dstruct(s, cparms, fUsingDOSMemory, "d"); |
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101 | dstruct(s, cparms, wNumVideoRequested, "u"); |
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102 | dstruct(s, cparms, fCaptureAudio, "d"); |
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103 | dstruct(s, cparms, wNumAudioRequested, "u"); |
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104 | dstruct(s, cparms, vKeyAbort, "u"); |
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105 | dstruct(s, cparms, fAbortLeftMouse, "d"); |
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106 | dstruct(s, cparms, fAbortRightMouse, "d"); |
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107 | dstruct(s, cparms, fLimitEnabled, "d"); |
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108 | dstruct(s, cparms, wTimeLimit, "u"); |
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109 | dstruct(s, cparms, fMCIControl, "d"); |
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110 | dstruct(s, cparms, fStepMCIDevice, "d"); |
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111 | dstruct(s, cparms, dwMCIStartTime, "lu"); |
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112 | dstruct(s, cparms, dwMCIStopTime, "lu"); |
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113 | dstruct(s, cparms, fStepCaptureAt2x, "d"); |
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114 | dstruct(s, cparms, wStepCaptureAverageFrames, "u"); |
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115 | dstruct(s, cparms, dwAudioBufferSize, "lu"); |
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116 | dstruct(s, cparms, fDisableWriteCache, "d"); |
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117 | dstruct(s, cparms, AVStreamMaster, "u"); |
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118 | } |
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119 | |||
120 | static void dump_videohdr(AVFormatContext *s, VIDEOHDR *vhdr) |
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121 | { |
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122 | #ifdef DEBUG |
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123 | av_log(s, AV_LOG_DEBUG, "VIDEOHDR\n"); |
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124 | dstruct(s, vhdr, lpData, "p"); |
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125 | dstruct(s, vhdr, dwBufferLength, "lu"); |
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126 | dstruct(s, vhdr, dwBytesUsed, "lu"); |
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127 | dstruct(s, vhdr, dwTimeCaptured, "lu"); |
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128 | dstruct(s, vhdr, dwUser, "lu"); |
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129 | dstruct(s, vhdr, dwFlags, "lu"); |
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130 | dstruct(s, vhdr, dwReserved[0], "lu"); |
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131 | dstruct(s, vhdr, dwReserved[1], "lu"); |
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132 | dstruct(s, vhdr, dwReserved[2], "lu"); |
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133 | dstruct(s, vhdr, dwReserved[3], "lu"); |
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134 | #endif |
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135 | } |
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136 | |||
137 | static void dump_bih(AVFormatContext *s, BITMAPINFOHEADER *bih) |
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138 | { |
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139 | av_log(s, AV_LOG_DEBUG, "BITMAPINFOHEADER\n"); |
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140 | dstruct(s, bih, biSize, "lu"); |
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141 | dstruct(s, bih, biWidth, "ld"); |
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142 | dstruct(s, bih, biHeight, "ld"); |
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143 | dstruct(s, bih, biPlanes, "d"); |
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144 | dstruct(s, bih, biBitCount, "d"); |
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145 | dstruct(s, bih, biCompression, "lu"); |
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146 | av_log(s, AV_LOG_DEBUG, " biCompression:\t\"%.4s\"\n", |
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147 | (char*) &bih->biCompression); |
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148 | dstruct(s, bih, biSizeImage, "lu"); |
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149 | dstruct(s, bih, biXPelsPerMeter, "lu"); |
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150 | dstruct(s, bih, biYPelsPerMeter, "lu"); |
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151 | dstruct(s, bih, biClrUsed, "lu"); |
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152 | dstruct(s, bih, biClrImportant, "lu"); |
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153 | } |
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154 | |||
155 | static int shall_we_drop(AVFormatContext *s) |
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156 | { |
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157 | struct vfw_ctx *ctx = s->priv_data; |
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158 | static const uint8_t dropscore[] = {62, 75, 87, 100}; |
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159 | const int ndropscores = FF_ARRAY_ELEMS(dropscore); |
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160 | unsigned int buffer_fullness = (ctx->curbufsize*100)/s->max_picture_buffer; |
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161 | |||
162 | if(dropscore[++ctx->frame_num%ndropscores] <= buffer_fullness) { |
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163 | av_log(s, AV_LOG_ERROR, |
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164 | "real-time buffer %d%% full! frame dropped!\n", buffer_fullness); |
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165 | return 1; |
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166 | } |
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167 | |||
168 | return 0; |
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169 | } |
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170 | |||
171 | static LRESULT CALLBACK videostream_cb(HWND hwnd, LPVIDEOHDR vdhdr) |
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172 | { |
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173 | AVFormatContext *s; |
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174 | struct vfw_ctx *ctx; |
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175 | AVPacketList **ppktl, *pktl_next; |
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176 | |||
177 | s = (AVFormatContext *) GetWindowLongPtr(hwnd, GWLP_USERDATA); |
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178 | ctx = s->priv_data; |
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179 | |||
180 | dump_videohdr(s, vdhdr); |
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181 | |||
182 | if(shall_we_drop(s)) |
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183 | return FALSE; |
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184 | |||
185 | WaitForSingleObject(ctx->mutex, INFINITE); |
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186 | |||
187 | pktl_next = av_mallocz(sizeof(AVPacketList)); |
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188 | if(!pktl_next) |
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189 | goto fail; |
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190 | |||
191 | if(av_new_packet(&pktl_next->pkt, vdhdr->dwBytesUsed) < 0) { |
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192 | av_free(pktl_next); |
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193 | goto fail; |
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194 | } |
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195 | |||
196 | pktl_next->pkt.pts = vdhdr->dwTimeCaptured; |
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197 | memcpy(pktl_next->pkt.data, vdhdr->lpData, vdhdr->dwBytesUsed); |
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198 | |||
199 | for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next); |
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200 | *ppktl = pktl_next; |
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201 | |||
202 | ctx->curbufsize += vdhdr->dwBytesUsed; |
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203 | |||
204 | SetEvent(ctx->event); |
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205 | ReleaseMutex(ctx->mutex); |
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206 | |||
207 | return TRUE; |
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208 | fail: |
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209 | ReleaseMutex(ctx->mutex); |
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210 | return FALSE; |
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211 | } |
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212 | |||
213 | static int vfw_read_close(AVFormatContext *s) |
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214 | { |
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215 | struct vfw_ctx *ctx = s->priv_data; |
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216 | AVPacketList *pktl; |
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217 | |||
218 | if(ctx->hwnd) { |
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219 | SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0); |
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220 | SendMessage(ctx->hwnd, WM_CAP_DRIVER_DISCONNECT, 0, 0); |
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221 | DestroyWindow(ctx->hwnd); |
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222 | } |
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223 | if(ctx->mutex) |
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224 | CloseHandle(ctx->mutex); |
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225 | if(ctx->event) |
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226 | CloseHandle(ctx->event); |
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227 | |||
228 | pktl = ctx->pktl; |
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229 | while (pktl) { |
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230 | AVPacketList *next = pktl->next; |
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231 | av_destruct_packet(&pktl->pkt); |
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232 | av_free(pktl); |
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233 | pktl = next; |
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234 | } |
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235 | |||
236 | return 0; |
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237 | } |
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238 | |||
239 | static int vfw_read_header(AVFormatContext *s) |
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240 | { |
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241 | struct vfw_ctx *ctx = s->priv_data; |
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242 | AVCodecContext *codec; |
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243 | AVStream *st; |
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244 | int devnum; |
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245 | int bisize; |
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246 | BITMAPINFO *bi = NULL; |
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247 | CAPTUREPARMS cparms; |
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248 | DWORD biCompression; |
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249 | WORD biBitCount; |
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250 | int ret; |
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251 | AVRational framerate_q; |
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252 | |||
253 | if (!strcmp(s->filename, "list")) { |
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254 | for (devnum = 0; devnum <= 9; devnum++) { |
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255 | char driver_name[256]; |
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256 | char driver_ver[256]; |
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257 | ret = capGetDriverDescription(devnum, |
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258 | driver_name, sizeof(driver_name), |
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259 | driver_ver, sizeof(driver_ver)); |
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260 | if (ret) { |
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261 | av_log(s, AV_LOG_INFO, "Driver %d\n", devnum); |
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262 | av_log(s, AV_LOG_INFO, " %s\n", driver_name); |
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263 | av_log(s, AV_LOG_INFO, " %s\n", driver_ver); |
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264 | } |
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265 | } |
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266 | return AVERROR(EIO); |
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267 | } |
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268 | |||
269 | ctx->hwnd = capCreateCaptureWindow(NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, 0); |
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270 | if(!ctx->hwnd) { |
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271 | av_log(s, AV_LOG_ERROR, "Could not create capture window.\n"); |
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272 | return AVERROR(EIO); |
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273 | } |
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274 | |||
275 | /* If atoi fails, devnum==0 and the default device is used */ |
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276 | devnum = atoi(s->filename); |
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277 | |||
278 | ret = SendMessage(ctx->hwnd, WM_CAP_DRIVER_CONNECT, devnum, 0); |
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279 | if(!ret) { |
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280 | av_log(s, AV_LOG_ERROR, "Could not connect to device.\n"); |
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281 | DestroyWindow(ctx->hwnd); |
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282 | return AVERROR(ENODEV); |
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283 | } |
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284 | |||
285 | SendMessage(ctx->hwnd, WM_CAP_SET_OVERLAY, 0, 0); |
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286 | SendMessage(ctx->hwnd, WM_CAP_SET_PREVIEW, 0, 0); |
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287 | |||
288 | ret = SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, |
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289 | (LPARAM) videostream_cb); |
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290 | if(!ret) { |
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291 | av_log(s, AV_LOG_ERROR, "Could not set video stream callback.\n"); |
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292 | goto fail; |
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293 | } |
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294 | |||
295 | SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) s); |
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296 | |||
297 | st = avformat_new_stream(s, NULL); |
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298 | if(!st) { |
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299 | vfw_read_close(s); |
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300 | return AVERROR(ENOMEM); |
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301 | } |
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302 | |||
303 | /* Set video format */ |
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304 | bisize = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, 0, 0); |
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305 | if(!bisize) |
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306 | goto fail; |
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307 | bi = av_malloc(bisize); |
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308 | if(!bi) { |
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309 | vfw_read_close(s); |
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310 | return AVERROR(ENOMEM); |
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311 | } |
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312 | ret = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi); |
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313 | if(!ret) |
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314 | goto fail; |
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315 | |||
316 | dump_bih(s, &bi->bmiHeader); |
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317 | |||
318 | ret = av_parse_video_rate(&framerate_q, ctx->framerate); |
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319 | if (ret < 0) { |
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320 | av_log(s, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", ctx->framerate); |
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321 | goto fail; |
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322 | } |
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323 | |||
324 | if (ctx->video_size) { |
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325 | ret = av_parse_video_size(&bi->bmiHeader.biWidth, &bi->bmiHeader.biHeight, ctx->video_size); |
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326 | if (ret < 0) { |
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327 | av_log(s, AV_LOG_ERROR, "Couldn't parse video size.\n"); |
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328 | goto fail; |
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329 | } |
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330 | } |
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331 | |||
332 | if (0) { |
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333 | /* For testing yet unsupported compressions |
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334 | * Copy these values from user-supplied verbose information */ |
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335 | bi->bmiHeader.biWidth = 320; |
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336 | bi->bmiHeader.biHeight = 240; |
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337 | bi->bmiHeader.biPlanes = 1; |
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338 | bi->bmiHeader.biBitCount = 12; |
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339 | bi->bmiHeader.biCompression = MKTAG('I','4','2','0'); |
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340 | bi->bmiHeader.biSizeImage = 115200; |
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341 | dump_bih(s, &bi->bmiHeader); |
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342 | } |
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343 | |||
344 | ret = SendMessage(ctx->hwnd, WM_CAP_SET_VIDEOFORMAT, bisize, (LPARAM) bi); |
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345 | if(!ret) { |
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346 | av_log(s, AV_LOG_ERROR, "Could not set Video Format.\n"); |
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347 | goto fail; |
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348 | } |
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349 | |||
350 | biCompression = bi->bmiHeader.biCompression; |
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351 | biBitCount = bi->bmiHeader.biBitCount; |
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352 | |||
353 | /* Set sequence setup */ |
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354 | ret = SendMessage(ctx->hwnd, WM_CAP_GET_SEQUENCE_SETUP, sizeof(cparms), |
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355 | (LPARAM) &cparms); |
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356 | if(!ret) |
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357 | goto fail; |
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358 | |||
359 | dump_captureparms(s, &cparms); |
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360 | |||
361 | cparms.fYield = 1; // Spawn a background thread |
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362 | cparms.dwRequestMicroSecPerFrame = |
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363 | (framerate_q.den*1000000) / framerate_q.num; |
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364 | cparms.fAbortLeftMouse = 0; |
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365 | cparms.fAbortRightMouse = 0; |
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366 | cparms.fCaptureAudio = 0; |
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367 | cparms.vKeyAbort = 0; |
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368 | |||
369 | ret = SendMessage(ctx->hwnd, WM_CAP_SET_SEQUENCE_SETUP, sizeof(cparms), |
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370 | (LPARAM) &cparms); |
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371 | if(!ret) |
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372 | goto fail; |
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373 | |||
374 | codec = st->codec; |
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375 | codec->time_base = av_inv_q(framerate_q); |
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376 | codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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377 | codec->width = bi->bmiHeader.biWidth; |
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378 | codec->height = bi->bmiHeader.biHeight; |
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379 | codec->pix_fmt = vfw_pixfmt(biCompression, biBitCount); |
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380 | if(codec->pix_fmt == AV_PIX_FMT_NONE) { |
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381 | codec->codec_id = vfw_codecid(biCompression); |
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382 | if(codec->codec_id == AV_CODEC_ID_NONE) { |
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383 | av_log(s, AV_LOG_ERROR, "Unknown compression type. " |
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384 | "Please report verbose (-v 9) debug information.\n"); |
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385 | vfw_read_close(s); |
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386 | return AVERROR_PATCHWELCOME; |
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387 | } |
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388 | codec->bits_per_coded_sample = biBitCount; |
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389 | } else { |
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390 | codec->codec_id = AV_CODEC_ID_RAWVIDEO; |
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391 | if(biCompression == BI_RGB) { |
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392 | codec->bits_per_coded_sample = biBitCount; |
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393 | codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE); |
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394 | if (codec->extradata) { |
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395 | codec->extradata_size = 9; |
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396 | memcpy(codec->extradata, "BottomUp", 9); |
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397 | } |
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398 | } |
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399 | } |
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400 | |||
401 | av_freep(&bi); |
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402 | |||
403 | avpriv_set_pts_info(st, 32, 1, 1000); |
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404 | |||
405 | ctx->mutex = CreateMutex(NULL, 0, NULL); |
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406 | if(!ctx->mutex) { |
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407 | av_log(s, AV_LOG_ERROR, "Could not create Mutex.\n" ); |
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408 | goto fail; |
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409 | } |
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410 | ctx->event = CreateEvent(NULL, 1, 0, NULL); |
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411 | if(!ctx->event) { |
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412 | av_log(s, AV_LOG_ERROR, "Could not create Event.\n" ); |
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413 | goto fail; |
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414 | } |
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415 | |||
416 | ret = SendMessage(ctx->hwnd, WM_CAP_SEQUENCE_NOFILE, 0, 0); |
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417 | if(!ret) { |
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418 | av_log(s, AV_LOG_ERROR, "Could not start capture sequence.\n" ); |
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419 | goto fail; |
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420 | } |
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421 | |||
422 | return 0; |
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423 | |||
424 | fail: |
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425 | av_freep(&bi); |
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426 | vfw_read_close(s); |
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427 | return AVERROR(EIO); |
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428 | } |
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429 | |||
430 | static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt) |
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431 | { |
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432 | struct vfw_ctx *ctx = s->priv_data; |
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433 | AVPacketList *pktl = NULL; |
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434 | |||
435 | while(!pktl) { |
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436 | WaitForSingleObject(ctx->mutex, INFINITE); |
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437 | pktl = ctx->pktl; |
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438 | if(ctx->pktl) { |
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439 | *pkt = ctx->pktl->pkt; |
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440 | ctx->pktl = ctx->pktl->next; |
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441 | av_free(pktl); |
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442 | } |
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443 | ResetEvent(ctx->event); |
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444 | ReleaseMutex(ctx->mutex); |
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445 | if(!pktl) { |
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446 | if(s->flags & AVFMT_FLAG_NONBLOCK) { |
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447 | return AVERROR(EAGAIN); |
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448 | } else { |
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449 | WaitForSingleObject(ctx->event, INFINITE); |
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450 | } |
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451 | } |
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452 | } |
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453 | |||
454 | ctx->curbufsize -= pkt->size; |
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455 | |||
456 | return pkt->size; |
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457 | } |
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458 | |||
459 | #define OFFSET(x) offsetof(struct vfw_ctx, x) |
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460 | #define DEC AV_OPT_FLAG_DECODING_PARAM |
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461 | static const AVOption options[] = { |
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462 | { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, |
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463 | { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC }, |
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464 | { NULL }, |
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465 | }; |
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466 | |||
467 | static const AVClass vfw_class = { |
||
468 | .class_name = "VFW indev", |
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469 | .item_name = av_default_item_name, |
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470 | .option = options, |
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471 | .version = LIBAVUTIL_VERSION_INT, |
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472 | }; |
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473 | |||
474 | AVInputFormat ff_vfwcap_demuxer = { |
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475 | .name = "vfwcap", |
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476 | .long_name = NULL_IF_CONFIG_SMALL("VfW video capture"), |
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477 | .priv_data_size = sizeof(struct vfw_ctx), |
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478 | .read_header = vfw_read_header, |
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479 | .read_packet = vfw_read_packet, |
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480 | .read_close = vfw_read_close, |
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481 | .flags = AVFMT_NOFILE, |
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482 | .priv_class = &vfw_class, |
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483 | };>>=>>=>>> |