FFmpeg
dshow_common.c
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1 /*
2  * Directshow capture interface
3  * Copyright (c) 2010 Ramiro Polla
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "dshow_capture.h"
23 
24 long ff_copy_dshow_media_type(AM_MEDIA_TYPE *dst, const AM_MEDIA_TYPE *src)
25 {
26  uint8_t *pbFormat = NULL;
27 
28  if (src->cbFormat) {
29  pbFormat = CoTaskMemAlloc(src->cbFormat);
30  if (!pbFormat)
31  return E_OUTOFMEMORY;
32  memcpy(pbFormat, src->pbFormat, src->cbFormat);
33  }
34 
35  *dst = *src;
36  dst->pUnk = NULL;
37  dst->pbFormat = pbFormat;
38 
39  return S_OK;
40 }
41 
42 void ff_printGUID(const GUID *g)
43 {
44 #if DSHOWDEBUG
45  const uint32_t *d = (const uint32_t *) &g->Data1;
46  const uint16_t *w = (const uint16_t *) &g->Data2;
47  const uint8_t *c = (const uint8_t *) &g->Data4;
48 
49  dshowdebug("0x%08x 0x%04x 0x%04x %02x%02x%02x%02x%02x%02x%02x%02x",
50  d[0], w[0], w[1],
51  c[0], c[1], c[2], c[3], c[4], c[5], c[6], c[7]);
52 #endif
53 }
54 
55 static const char *dshow_context_to_name(void *ptr)
56 {
57  return "dshow";
58 }
59 static const AVClass ff_dshow_context_class = { "DirectShow", dshow_context_to_name };
60 const AVClass *ff_dshow_context_class_ptr = &ff_dshow_context_class;
61 
62 #define dstruct(pctx, sname, var, type) \
63  dshowdebug(" "#var":\t%"type"\n", sname->var)
64 
65 #if DSHOWDEBUG
66 static void dump_bih(void *s, BITMAPINFOHEADER *bih)
67 {
68  dshowdebug(" BITMAPINFOHEADER\n");
69  dstruct(s, bih, biSize, "lu");
70  dstruct(s, bih, biWidth, "ld");
71  dstruct(s, bih, biHeight, "ld");
72  dstruct(s, bih, biPlanes, "d");
73  dstruct(s, bih, biBitCount, "d");
74  dstruct(s, bih, biCompression, "lu");
75  dshowdebug(" biCompression:\t\"%.4s\"\n",
76  (char*) &bih->biCompression);
77  dstruct(s, bih, biSizeImage, "lu");
78  dstruct(s, bih, biXPelsPerMeter, "lu");
79  dstruct(s, bih, biYPelsPerMeter, "lu");
80  dstruct(s, bih, biClrUsed, "lu");
81  dstruct(s, bih, biClrImportant, "lu");
82 }
83 #endif
84 
85 void ff_print_VIDEO_STREAM_CONFIG_CAPS(const VIDEO_STREAM_CONFIG_CAPS *caps)
86 {
87 #if DSHOWDEBUG
88  dshowdebug(" VIDEO_STREAM_CONFIG_CAPS\n");
89  dshowdebug(" guid\t");
90  ff_printGUID(&caps->guid);
91  dshowdebug("\n");
92  dshowdebug(" VideoStandard\t%lu\n", caps->VideoStandard);
93  dshowdebug(" InputSize %ld\t%ld\n", caps->InputSize.cx, caps->InputSize.cy);
94  dshowdebug(" MinCroppingSize %ld\t%ld\n", caps->MinCroppingSize.cx, caps->MinCroppingSize.cy);
95  dshowdebug(" MaxCroppingSize %ld\t%ld\n", caps->MaxCroppingSize.cx, caps->MaxCroppingSize.cy);
96  dshowdebug(" CropGranularityX\t%d\n", caps->CropGranularityX);
97  dshowdebug(" CropGranularityY\t%d\n", caps->CropGranularityY);
98  dshowdebug(" CropAlignX\t%d\n", caps->CropAlignX);
99  dshowdebug(" CropAlignY\t%d\n", caps->CropAlignY);
100  dshowdebug(" MinOutputSize %ld\t%ld\n", caps->MinOutputSize.cx, caps->MinOutputSize.cy);
101  dshowdebug(" MaxOutputSize %ld\t%ld\n", caps->MaxOutputSize.cx, caps->MaxOutputSize.cy);
102  dshowdebug(" OutputGranularityX\t%d\n", caps->OutputGranularityX);
103  dshowdebug(" OutputGranularityY\t%d\n", caps->OutputGranularityY);
104  dshowdebug(" StretchTapsX\t%d\n", caps->StretchTapsX);
105  dshowdebug(" StretchTapsY\t%d\n", caps->StretchTapsY);
106  dshowdebug(" ShrinkTapsX\t%d\n", caps->ShrinkTapsX);
107  dshowdebug(" ShrinkTapsY\t%d\n", caps->ShrinkTapsY);
108  dshowdebug(" MinFrameInterval\t%"PRId64"\n", caps->MinFrameInterval);
109  dshowdebug(" MaxFrameInterval\t%"PRId64"\n", caps->MaxFrameInterval);
110  dshowdebug(" MinBitsPerSecond\t%ld\n", caps->MinBitsPerSecond);
111  dshowdebug(" MaxBitsPerSecond\t%ld\n", caps->MaxBitsPerSecond);
112 #endif
113 }
114 
115 void ff_print_AUDIO_STREAM_CONFIG_CAPS(const AUDIO_STREAM_CONFIG_CAPS *caps)
116 {
117 #if DSHOWDEBUG
118  dshowdebug(" AUDIO_STREAM_CONFIG_CAPS\n");
119  dshowdebug(" guid\t");
120  ff_printGUID(&caps->guid);
121  dshowdebug("\n");
122  dshowdebug(" MinimumChannels\t%lu\n", caps->MinimumChannels);
123  dshowdebug(" MaximumChannels\t%lu\n", caps->MaximumChannels);
124  dshowdebug(" ChannelsGranularity\t%lu\n", caps->ChannelsGranularity);
125  dshowdebug(" MinimumBitsPerSample\t%lu\n", caps->MinimumBitsPerSample);
126  dshowdebug(" MaximumBitsPerSample\t%lu\n", caps->MaximumBitsPerSample);
127  dshowdebug(" BitsPerSampleGranularity\t%lu\n", caps->BitsPerSampleGranularity);
128  dshowdebug(" MinimumSampleFrequency\t%lu\n", caps->MinimumSampleFrequency);
129  dshowdebug(" MaximumSampleFrequency\t%lu\n", caps->MaximumSampleFrequency);
130  dshowdebug(" SampleFrequencyGranularity\t%lu\n", caps->SampleFrequencyGranularity);
131 #endif
132 }
133 
134 void ff_print_AM_MEDIA_TYPE(const AM_MEDIA_TYPE *type)
135 {
136 #if DSHOWDEBUG
137  dshowdebug(" majortype\t");
138  ff_printGUID(&type->majortype);
139  dshowdebug("\n");
140  dshowdebug(" subtype\t");
141  ff_printGUID(&type->subtype);
142  dshowdebug("\n");
143  dshowdebug(" bFixedSizeSamples\t%d\n", type->bFixedSizeSamples);
144  dshowdebug(" bTemporalCompression\t%d\n", type->bTemporalCompression);
145  dshowdebug(" lSampleSize\t%lu\n", type->lSampleSize);
146  dshowdebug(" formattype\t");
147  ff_printGUID(&type->formattype);
148  dshowdebug("\n");
149  dshowdebug(" pUnk\t%p\n", type->pUnk);
150  dshowdebug(" cbFormat\t%lu\n", type->cbFormat);
151  dshowdebug(" pbFormat\t%p\n", type->pbFormat);
152 
153  if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo)) {
154  VIDEOINFOHEADER *v = (void *) type->pbFormat;
155  dshowdebug(" rcSource: left %ld top %ld right %ld bottom %ld\n",
156  v->rcSource.left, v->rcSource.top, v->rcSource.right, v->rcSource.bottom);
157  dshowdebug(" rcTarget: left %ld top %ld right %ld bottom %ld\n",
158  v->rcTarget.left, v->rcTarget.top, v->rcTarget.right, v->rcTarget.bottom);
159  dshowdebug(" dwBitRate: %lu\n", v->dwBitRate);
160  dshowdebug(" dwBitErrorRate: %lu\n", v->dwBitErrorRate);
161  dshowdebug(" AvgTimePerFrame: %"PRId64"\n", v->AvgTimePerFrame);
162  dump_bih(NULL, &v->bmiHeader);
163  } else if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo2)) {
164  VIDEOINFOHEADER2 *v = (void *) type->pbFormat;
165  dshowdebug(" rcSource: left %ld top %ld right %ld bottom %ld\n",
166  v->rcSource.left, v->rcSource.top, v->rcSource.right, v->rcSource.bottom);
167  dshowdebug(" rcTarget: left %ld top %ld right %ld bottom %ld\n",
168  v->rcTarget.left, v->rcTarget.top, v->rcTarget.right, v->rcTarget.bottom);
169  dshowdebug(" dwBitRate: %lu\n", v->dwBitRate);
170  dshowdebug(" dwBitErrorRate: %lu\n", v->dwBitErrorRate);
171  dshowdebug(" AvgTimePerFrame: %"PRId64"\n", v->AvgTimePerFrame);
172  dshowdebug(" dwInterlaceFlags: %lu\n", v->dwInterlaceFlags);
173  dshowdebug(" dwCopyProtectFlags: %lu\n", v->dwCopyProtectFlags);
174  dshowdebug(" dwPictAspectRatioX: %lu\n", v->dwPictAspectRatioX);
175  dshowdebug(" dwPictAspectRatioY: %lu\n", v->dwPictAspectRatioY);
176 // dshowdebug(" dwReserved1: %lu\n", v->u.dwReserved1); /* mingw-w64 is buggy and doesn't name unnamed unions */
177  dshowdebug(" dwReserved2: %lu\n", v->dwReserved2);
178  dump_bih(NULL, &v->bmiHeader);
179  } else if (IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx)) {
180  WAVEFORMATEX *fx = (void *) type->pbFormat;
181  dshowdebug(" wFormatTag: %u\n", fx->wFormatTag);
182  dshowdebug(" nChannels: %u\n", fx->nChannels);
183  dshowdebug(" nSamplesPerSec: %lu\n", fx->nSamplesPerSec);
184  dshowdebug(" nAvgBytesPerSec: %lu\n", fx->nAvgBytesPerSec);
185  dshowdebug(" nBlockAlign: %u\n", fx->nBlockAlign);
186  dshowdebug(" wBitsPerSample: %u\n", fx->wBitsPerSample);
187  dshowdebug(" cbSize: %u\n", fx->cbSize);
188  }
189 #endif
190 }
ff_printGUID
void ff_printGUID(const GUID *g)
Definition: dshow_common.c:42
dshow_capture.h
w
uint8_t w
Definition: llviddspenc.c:38
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
dump_bih
static void dump_bih(AVFormatContext *s, BITMAPINFOHEADER *bih)
Definition: vfwcap.c:144
s
#define s(width, name)
Definition: cbs_vp9.c:257
dshowdebug
#define dshowdebug(...)
Definition: dshow_capture.h:51
g
const char * g
Definition: vf_curves.c:117
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
src
#define src
Definition: vp8dsp.c:255
ff_print_AUDIO_STREAM_CONFIG_CAPS
void ff_print_AUDIO_STREAM_CONFIG_CAPS(const AUDIO_STREAM_CONFIG_CAPS *caps)
Definition: dshow_common.c:115
ff_print_AM_MEDIA_TYPE
void ff_print_AM_MEDIA_TYPE(const AM_MEDIA_TYPE *type)
Definition: dshow_common.c:134
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
ff_dshow_context_class
static const AVClass ff_dshow_context_class
Definition: dshow_common.c:59
dstruct
#define dstruct(pctx, sname, var, type)
Definition: dshow_common.c:62
ff_dshow_context_class_ptr
const AVClass * ff_dshow_context_class_ptr
Definition: dshow_common.c:60
ff_copy_dshow_media_type
long ff_copy_dshow_media_type(AM_MEDIA_TYPE *dst, const AM_MEDIA_TYPE *src)
Definition: dshow_common.c:24
d
d
Definition: ffmpeg_filter.c:156
dshow_context_to_name
static const char * dshow_context_to_name(void *ptr)
Definition: dshow_common.c:55
ff_print_VIDEO_STREAM_CONFIG_CAPS
void ff_print_VIDEO_STREAM_CONFIG_CAPS(const VIDEO_STREAM_CONFIG_CAPS *caps)
Definition: dshow_common.c:85
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