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dshow_crossbar.c
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/*
* DirectShow capture interface
* Copyright (c) 2015 Roger Pack
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "dshow_capture.h"
static const char *
GetPhysicalPinName(long pin_type)
{
switch (pin_type)
{
case PhysConn_Video_Tuner: return "Video Tuner";
case PhysConn_Video_Composite: return "Video Composite";
case PhysConn_Video_SVideo: return "S-Video";
case PhysConn_Video_RGB: return "Video RGB";
case PhysConn_Video_YRYBY: return "Video YRYBY";
case PhysConn_Video_SerialDigital: return "Video Serial Digital";
case PhysConn_Video_ParallelDigital: return "Video Parallel Digital";
case PhysConn_Video_SCSI: return "Video SCSI";
case PhysConn_Video_AUX: return "Video AUX";
case PhysConn_Video_1394: return "Video 1394";
case PhysConn_Video_USB: return "Video USB";
case PhysConn_Video_VideoDecoder: return "Video Decoder";
case PhysConn_Video_VideoEncoder: return "Video Encoder";
case PhysConn_Audio_Tuner: return "Audio Tuner";
case PhysConn_Audio_Line: return "Audio Line";
case PhysConn_Audio_Mic: return "Audio Microphone";
case PhysConn_Audio_AESDigital: return "Audio AES/EBU Digital";
case PhysConn_Audio_SPDIFDigital: return "Audio S/PDIF";
case PhysConn_Audio_SCSI: return "Audio SCSI";
case PhysConn_Audio_AUX: return "Audio AUX";
case PhysConn_Audio_1394: return "Audio 1394";
case PhysConn_Audio_USB: return "Audio USB";
case PhysConn_Audio_AudioDecoder: return "Audio Decoder";
default: return "Unknown Crossbar Pin Type—Please report!";
}
}
static HRESULT
setup_crossbar_options(IAMCrossbar *cross_bar, enum dshowDeviceType devtype, AVFormatContext *avctx)
{
struct dshow_ctx *ctx = avctx->priv_data;
long count_output_pins, count_input_pins;
int i;
int log_level = ctx->list_options ? AV_LOG_INFO : AV_LOG_DEBUG;
int video_input_pin = ctx->crossbar_video_input_pin_number;
int audio_input_pin = ctx->crossbar_audio_input_pin_number;
const char *device_name = ctx->device_name[devtype];
HRESULT hr;
av_log(avctx, log_level, "Crossbar Switching Information for %s:\n", device_name);
hr = IAMCrossbar_get_PinCounts(cross_bar, &count_output_pins, &count_input_pins);
if (hr != S_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to get crossbar pin counts\n");
return hr;
}
for (i = 0; i < count_output_pins; i++)
{
int j;
long related_pin, pin_type, route_to_pin;
hr = IAMCrossbar_get_CrossbarPinInfo(cross_bar, FALSE, i, &related_pin, &pin_type);
if (pin_type == PhysConn_Video_VideoDecoder) {
/* assume there is only one "Video (and one Audio) Decoder" output pin, and it's all we care about routing to...for now */
if (video_input_pin != -1) {
av_log(avctx, log_level, "Routing video input from pin %d\n", video_input_pin);
hr = IAMCrossbar_Route(cross_bar, i, video_input_pin);
if (hr != S_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to route video input from pin %d\n", video_input_pin);
return AVERROR(EIO);
}
}
} else if (pin_type == PhysConn_Audio_AudioDecoder) {
if (audio_input_pin != -1) {
av_log(avctx, log_level, "Routing audio input from pin %d\n", audio_input_pin);
hr = IAMCrossbar_Route(cross_bar, i, audio_input_pin);
if (hr != S_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to route audio input from pin %d\n", audio_input_pin);
return hr;
}
}
} else {
av_log(avctx, AV_LOG_WARNING, "Unexpected output pin type, please report the type if you want to use this (%s)", GetPhysicalPinName(pin_type));
}
hr = IAMCrossbar_get_IsRoutedTo(cross_bar, i, &route_to_pin);
if (hr != S_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to get crossbar is routed to from pin %d\n", i);
return hr;
}
av_log(avctx, log_level, " Crossbar Output pin %d: \"%s\" related output pin: %ld ", i, GetPhysicalPinName(pin_type), related_pin);
av_log(avctx, log_level, "current input pin: %ld ", route_to_pin);
av_log(avctx, log_level, "compatible input pins: ");
for (j = 0; j < count_input_pins; j++)
{
hr = IAMCrossbar_CanRoute(cross_bar, i, j);
if (hr == S_OK)
av_log(avctx, log_level ,"%d ", j);
}
av_log(avctx, log_level, "\n");
}
for (i = 0; i < count_input_pins; i++)
{
long related_pin, pin_type;
hr = IAMCrossbar_get_CrossbarPinInfo(cross_bar, TRUE, i, &related_pin, &pin_type);
if (hr != S_OK) {
av_log(avctx, AV_LOG_ERROR, "unable to get crossbar info audio input from pin %d\n", i);
return hr;
}
av_log(avctx, log_level, " Crossbar Input pin %d - \"%s\" ", i, GetPhysicalPinName(pin_type));
av_log(avctx, log_level, "related input pin: %ld\n", related_pin);
}
return S_OK;
}
/**
* Given a fully constructed graph, check if there is a cross bar filter, and configure its pins if so.
*/
HRESULT
dshow_try_setup_crossbar_options(ICaptureGraphBuilder2 *graph_builder2,
IBaseFilter *device_filter, enum dshowDeviceType devtype, AVFormatContext *avctx)
{
struct dshow_ctx *ctx = avctx->priv_data;
IAMCrossbar *cross_bar = NULL;
IBaseFilter *cross_bar_base_filter = NULL;
IAMTVTuner *tv_tuner_filter = NULL;
IBaseFilter *tv_tuner_base_filter = NULL;
IAMAudioInputMixer *tv_audio_filter = NULL;
IBaseFilter *tv_audio_base_filter = NULL;
HRESULT hr;
hr = ICaptureGraphBuilder2_FindInterface(graph_builder2, &LOOK_UPSTREAM_ONLY, (const GUID *) NULL,
device_filter, &IID_IAMCrossbar, (void**) &cross_bar);
if (hr != S_OK) {
/* no crossbar found */
hr = S_OK;
goto end;
}
/* TODO some TV tuners apparently have multiple crossbars? */
if (devtype == VideoDevice && ctx->show_video_crossbar_connection_dialog ||
devtype == AudioDevice && ctx->show_audio_crossbar_connection_dialog) {
hr = IAMCrossbar_QueryInterface(cross_bar, &IID_IBaseFilter, (void **) &cross_bar_base_filter);
if (hr != S_OK)
goto end;
dshow_show_filter_properties(cross_bar_base_filter, avctx);
}
if (devtype == VideoDevice && ctx->show_analog_tv_tuner_dialog) {
hr = ICaptureGraphBuilder2_FindInterface(graph_builder2, &LOOK_UPSTREAM_ONLY, NULL,
device_filter, &IID_IAMTVTuner, (void**) &tv_tuner_filter);
if (hr == S_OK) {
hr = IAMCrossbar_QueryInterface(tv_tuner_filter, &IID_IBaseFilter, (void **) &tv_tuner_base_filter);
if (hr != S_OK)
goto end;
dshow_show_filter_properties(tv_tuner_base_filter, avctx);
} else {
av_log(avctx, AV_LOG_WARNING, "unable to find a tv tuner to display dialog for!");
}
}
if (devtype == AudioDevice && ctx->show_analog_tv_tuner_audio_dialog) {
hr = ICaptureGraphBuilder2_FindInterface(graph_builder2, &LOOK_UPSTREAM_ONLY, NULL,
device_filter, &IID_IAMTVAudio, (void**) &tv_audio_filter);
if (hr == S_OK) {
hr = IAMCrossbar_QueryInterface(tv_audio_filter, &IID_IBaseFilter, (void **) &tv_audio_base_filter);
if (hr != S_OK)
goto end;
dshow_show_filter_properties(tv_audio_base_filter, avctx);
} else {
av_log(avctx, AV_LOG_WARNING, "unable to find a tv audio tuner to display dialog for!");
}
}
hr = setup_crossbar_options(cross_bar, devtype, avctx);
if (hr != S_OK)
goto end;
end:
if (cross_bar)
IAMCrossbar_Release(cross_bar);
if (cross_bar_base_filter)
IBaseFilter_Release(cross_bar_base_filter);
if (tv_tuner_filter)
IAMTVTuner_Release(tv_tuner_filter);
if (tv_tuner_base_filter)
IBaseFilter_Release(tv_tuner_base_filter);
return hr;
}