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dshow_crossbar.c
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1 /*
2  * DirectShow capture interface
3  * Copyright (c) 2015 Roger Pack
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 static const char *
25 GetPhysicalPinName(long pin_type)
26 {
27  switch (pin_type)
28  {
29  case PhysConn_Video_Tuner: return "Video Tuner";
30  case PhysConn_Video_Composite: return "Video Composite";
31  case PhysConn_Video_SVideo: return "S-Video";
32  case PhysConn_Video_RGB: return "Video RGB";
33  case PhysConn_Video_YRYBY: return "Video YRYBY";
34  case PhysConn_Video_SerialDigital: return "Video Serial Digital";
35  case PhysConn_Video_ParallelDigital: return "Video Parallel Digital";
36  case PhysConn_Video_SCSI: return "Video SCSI";
37  case PhysConn_Video_AUX: return "Video AUX";
38  case PhysConn_Video_1394: return "Video 1394";
39  case PhysConn_Video_USB: return "Video USB";
40  case PhysConn_Video_VideoDecoder: return "Video Decoder";
41  case PhysConn_Video_VideoEncoder: return "Video Encoder";
42 
43  case PhysConn_Audio_Tuner: return "Audio Tuner";
44  case PhysConn_Audio_Line: return "Audio Line";
45  case PhysConn_Audio_Mic: return "Audio Microphone";
46  case PhysConn_Audio_AESDigital: return "Audio AES/EBU Digital";
47  case PhysConn_Audio_SPDIFDigital: return "Audio S/PDIF";
48  case PhysConn_Audio_SCSI: return "Audio SCSI";
49  case PhysConn_Audio_AUX: return "Audio AUX";
50  case PhysConn_Audio_1394: return "Audio 1394";
51  case PhysConn_Audio_USB: return "Audio USB";
52  case PhysConn_Audio_AudioDecoder: return "Audio Decoder";
53  default: return "Unknown Crossbar Pin Type—Please report!";
54  }
55 }
56 
57 static HRESULT
58 setup_crossbar_options(IAMCrossbar *cross_bar, enum dshowDeviceType devtype, AVFormatContext *avctx)
59 {
60  struct dshow_ctx *ctx = avctx->priv_data;
61  long count_output_pins, count_input_pins;
62  int i;
63  int log_level = ctx->list_options ? AV_LOG_INFO : AV_LOG_DEBUG;
64  int video_input_pin = ctx->crossbar_video_input_pin_number;
65  int audio_input_pin = ctx->crossbar_audio_input_pin_number;
66  const char *device_name = ctx->device_name[devtype];
67  HRESULT hr;
68 
69  av_log(avctx, log_level, "Crossbar Switching Information for %s:\n", device_name);
70  hr = IAMCrossbar_get_PinCounts(cross_bar, &count_output_pins, &count_input_pins);
71  if (hr != S_OK) {
72  av_log(avctx, AV_LOG_ERROR, "Unable to get crossbar pin counts\n");
73  return hr;
74  }
75 
76  for (i = 0; i < count_output_pins; i++)
77  {
78  int j;
79  long related_pin, pin_type, route_to_pin;
80  hr = IAMCrossbar_get_CrossbarPinInfo(cross_bar, FALSE, i, &related_pin, &pin_type);
81  if (pin_type == PhysConn_Video_VideoDecoder) {
82  /* assume there is only one "Video (and one Audio) Decoder" output pin, and it's all we care about routing to...for now */
83  if (video_input_pin != -1) {
84  av_log(avctx, log_level, "Routing video input from pin %d\n", video_input_pin);
85  hr = IAMCrossbar_Route(cross_bar, i, video_input_pin);
86  if (hr != S_OK) {
87  av_log(avctx, AV_LOG_ERROR, "Unable to route video input from pin %d\n", video_input_pin);
88  return AVERROR(EIO);
89  }
90  }
91  } else if (pin_type == PhysConn_Audio_AudioDecoder) {
92  if (audio_input_pin != -1) {
93  av_log(avctx, log_level, "Routing audio input from pin %d\n", audio_input_pin);
94  hr = IAMCrossbar_Route(cross_bar, i, audio_input_pin);
95  if (hr != S_OK) {
96  av_log(avctx, AV_LOG_ERROR, "Unable to route audio input from pin %d\n", audio_input_pin);
97  return hr;
98  }
99  }
100  } else {
101  av_log(avctx, AV_LOG_WARNING, "Unexpected output pin type, please report the type if you want to use this (%s)", GetPhysicalPinName(pin_type));
102  }
103 
104  hr = IAMCrossbar_get_IsRoutedTo(cross_bar, i, &route_to_pin);
105  if (hr != S_OK) {
106  av_log(avctx, AV_LOG_ERROR, "Unable to get crossbar is routed to from pin %d\n", i);
107  return hr;
108  }
109  av_log(avctx, log_level, " Crossbar Output pin %d: \"%s\" related output pin: %ld ", i, GetPhysicalPinName(pin_type), related_pin);
110  av_log(avctx, log_level, "current input pin: %ld ", route_to_pin);
111  av_log(avctx, log_level, "compatible input pins: ");
112 
113  for (j = 0; j < count_input_pins; j++)
114  {
115  hr = IAMCrossbar_CanRoute(cross_bar, i, j);
116  if (hr == S_OK)
117  av_log(avctx, log_level ,"%d ", j);
118  }
119  av_log(avctx, log_level, "\n");
120  }
121 
122  for (i = 0; i < count_input_pins; i++)
123  {
124  long related_pin, pin_type;
125  hr = IAMCrossbar_get_CrossbarPinInfo(cross_bar, TRUE, i, &related_pin, &pin_type);
126  if (hr != S_OK) {
127  av_log(avctx, AV_LOG_ERROR, "unable to get crossbar info audio input from pin %d\n", i);
128  return hr;
129  }
130  av_log(avctx, log_level, " Crossbar Input pin %d - \"%s\" ", i, GetPhysicalPinName(pin_type));
131  av_log(avctx, log_level, "related input pin: %ld\n", related_pin);
132  }
133  return S_OK;
134 }
135 
136 /**
137  * Given a fully constructed graph, check if there is a cross bar filter, and configure its pins if so.
138  */
139 HRESULT
140 dshow_try_setup_crossbar_options(ICaptureGraphBuilder2 *graph_builder2,
141  IBaseFilter *device_filter, enum dshowDeviceType devtype, AVFormatContext *avctx)
142 {
143  struct dshow_ctx *ctx = avctx->priv_data;
144  IAMCrossbar *cross_bar = NULL;
145  IBaseFilter *cross_bar_base_filter = NULL;
146  IAMTVTuner *tv_tuner_filter = NULL;
147  IBaseFilter *tv_tuner_base_filter = NULL;
148  IAMAudioInputMixer *tv_audio_filter = NULL;
149  IBaseFilter *tv_audio_base_filter = NULL;
150  HRESULT hr;
151 
152  hr = ICaptureGraphBuilder2_FindInterface(graph_builder2, &LOOK_UPSTREAM_ONLY, (const GUID *) NULL,
153  device_filter, &IID_IAMCrossbar, (void**) &cross_bar);
154  if (hr != S_OK) {
155  /* no crossbar found */
156  hr = S_OK;
157  goto end;
158  }
159  /* TODO some TV tuners apparently have multiple crossbars? */
160 
161  if (devtype == VideoDevice && ctx->show_video_crossbar_connection_dialog ||
162  devtype == AudioDevice && ctx->show_audio_crossbar_connection_dialog) {
163  hr = IAMCrossbar_QueryInterface(cross_bar, &IID_IBaseFilter, (void **) &cross_bar_base_filter);
164  if (hr != S_OK)
165  goto end;
166  dshow_show_filter_properties(cross_bar_base_filter, avctx);
167  }
168 
169  if (devtype == VideoDevice && ctx->show_analog_tv_tuner_dialog) {
170  hr = ICaptureGraphBuilder2_FindInterface(graph_builder2, &LOOK_UPSTREAM_ONLY, NULL,
171  device_filter, &IID_IAMTVTuner, (void**) &tv_tuner_filter);
172  if (hr == S_OK) {
173  hr = IAMCrossbar_QueryInterface(tv_tuner_filter, &IID_IBaseFilter, (void **) &tv_tuner_base_filter);
174  if (hr != S_OK)
175  goto end;
176  dshow_show_filter_properties(tv_tuner_base_filter, avctx);
177  } else {
178  av_log(avctx, AV_LOG_WARNING, "unable to find a tv tuner to display dialog for!");
179  }
180  }
181  if (devtype == AudioDevice && ctx->show_analog_tv_tuner_audio_dialog) {
182  hr = ICaptureGraphBuilder2_FindInterface(graph_builder2, &LOOK_UPSTREAM_ONLY, NULL,
183  device_filter, &IID_IAMTVAudio, (void**) &tv_audio_filter);
184  if (hr == S_OK) {
185  hr = IAMCrossbar_QueryInterface(tv_audio_filter, &IID_IBaseFilter, (void **) &tv_audio_base_filter);
186  if (hr != S_OK)
187  goto end;
188  dshow_show_filter_properties(tv_audio_base_filter, avctx);
189  } else {
190  av_log(avctx, AV_LOG_WARNING, "unable to find a tv audio tuner to display dialog for!");
191  }
192  }
193 
194  hr = setup_crossbar_options(cross_bar, devtype, avctx);
195  if (hr != S_OK)
196  goto end;
197 
198 end:
199  if (cross_bar)
200  IAMCrossbar_Release(cross_bar);
201  if (cross_bar_base_filter)
202  IBaseFilter_Release(cross_bar_base_filter);
203  if (tv_tuner_filter)
204  IAMTVTuner_Release(tv_tuner_filter);
205  if (tv_tuner_base_filter)
206  IBaseFilter_Release(tv_tuner_base_filter);
207  return hr;
208 }
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