/***************************************************************************** * decklink.cpp: BlackMagic DeckLink SDI input module ***************************************************************************** * Copyright (C) 2010 Steinar H. Gunderson * Copyright (C) 2012-2014 Rafaël Carré * * Authors: Steinar H. Gunderson Rafaël Carré * * This program 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. * * This library 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 this program; if not, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #include #include #include #if BLACKMAGIC_DECKLINK_API_VERSION < 0x0b010000 #define IID_IDeckLinkProfileAttributes IID_IDeckLinkAttributes #define IDeckLinkProfileAttributes IDeckLinkAttributes #endif #include "sdi.h" static int Open (vlc_object_t *); static void Close(vlc_object_t *); #define CARD_INDEX_TEXT N_("Input card to use") #define CARD_INDEX_LONGTEXT N_( \ "DeckLink capture card to use, if multiple exist. " \ "The cards are numbered from 0.") #define MODE_TEXT N_("Desired input video mode. Leave empty for autodetection.") #define MODE_LONGTEXT N_( \ "Desired input video mode for DeckLink captures. " \ "This value should be a FOURCC code in textual " \ "form, e.g. \"ntsc\".") #define AUDIO_CONNECTION_TEXT N_("Audio connection") #define AUDIO_CONNECTION_LONGTEXT N_( \ "Audio connection to use for DeckLink captures. " \ "Valid choices: embedded, aesebu, analog. " \ "Leave blank for card default.") #define RATE_TEXT N_("Audio samplerate (Hz)") #define RATE_LONGTEXT N_( \ "Audio sampling rate (in hertz) for DeckLink captures. " \ "0 disables audio input.") #define CHANNELS_TEXT N_("Number of audio channels") #define CHANNELS_LONGTEXT N_( \ "Number of input audio channels for DeckLink captures. " \ "Must be 2, 8 or 16. 0 disables audio input.") #define VIDEO_CONNECTION_TEXT N_("Video connection") #define VIDEO_CONNECTION_LONGTEXT N_( \ "Video connection to use for DeckLink captures. " \ "Valid choices: sdi, hdmi, opticalsdi, component, " \ "composite, svideo. " \ "Leave blank for card default.") static const char *const ppsz_videoconns[] = { "sdi", "hdmi", "opticalsdi", "component", "composite", "svideo" }; static const char *const ppsz_videoconns_text[] = { N_("SDI"), N_("HDMI"), N_("Optical SDI"), N_("Component"), N_("Composite"), N_("S-Video") }; static const char *const ppsz_audioconns[] = { "embedded", "aesebu", "analog" }; static const char *const ppsz_audioconns_text[] = { N_("Embedded"), N_("AES/EBU"), N_("Analog") }; #define ASPECT_RATIO_TEXT N_("Aspect ratio") #define ASPECT_RATIO_LONGTEXT N_(\ "Aspect ratio (4:3, 16:9). Default assumes square pixels.") vlc_module_begin () set_shortname(N_("DeckLink")) set_description(N_("Blackmagic DeckLink SDI input")) set_category(CAT_INPUT) set_subcategory(SUBCAT_INPUT_ACCESS) add_integer("decklink-card-index", 0, CARD_INDEX_TEXT, CARD_INDEX_LONGTEXT, true) add_string("decklink-mode", NULL, MODE_TEXT, MODE_LONGTEXT, true) add_string("decklink-audio-connection", 0, AUDIO_CONNECTION_TEXT, AUDIO_CONNECTION_LONGTEXT, true) change_string_list(ppsz_audioconns, ppsz_audioconns_text) add_integer("decklink-audio-rate", 48000, RATE_TEXT, RATE_LONGTEXT, true) add_integer("decklink-audio-channels", 2, CHANNELS_TEXT, CHANNELS_LONGTEXT, true) add_string("decklink-video-connection", 0, VIDEO_CONNECTION_TEXT, VIDEO_CONNECTION_LONGTEXT, true) change_string_list(ppsz_videoconns, ppsz_videoconns_text) add_string("decklink-aspect-ratio", NULL, ASPECT_RATIO_TEXT, ASPECT_RATIO_LONGTEXT, true) add_bool("decklink-tenbits", false, N_("10 bits"), N_("10 bits"), true) add_shortcut("decklink") set_capability("access_demux", 10) set_callbacks(Open, Close) vlc_module_end () static int Control(demux_t *, int, va_list); class DeckLinkCaptureDelegate; struct demux_sys_t { IDeckLink *card; IDeckLinkInput *input; DeckLinkCaptureDelegate *delegate; /* We need to hold onto the IDeckLinkConfiguration object, or our settings will not apply. See section 2.4.15 of the Blackmagic DeckLink SDK documentation. */ IDeckLinkConfiguration *config; IDeckLinkProfileAttributes *attributes; bool autodetect; es_out_id_t *video_es; es_format_t video_fmt; es_out_id_t *audio_es; es_out_id_t *cc_es; vlc_mutex_t pts_lock; int last_pts; /* protected by */ uint32_t dominance_flags; int channels; bool tenbits; }; static const char *GetFieldDominance(BMDFieldDominance dom, uint32_t *flags) { switch(dom) { case bmdProgressiveFrame: return ""; case bmdProgressiveSegmentedFrame: return ", segmented"; case bmdLowerFieldFirst: *flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST; return ", interlaced [BFF]"; case bmdUpperFieldFirst: *flags = BLOCK_FLAG_TOP_FIELD_FIRST; return ", interlaced [TFF]"; case bmdUnknownFieldDominance: default: return ", unknown field dominance"; } } static es_format_t GetModeSettings(demux_t *demux, IDeckLinkDisplayMode *m, BMDDetectedVideoInputFormatFlags fmt_flags) { demux_sys_t *sys = demux->p_sys; uint32_t flags = 0; (void)GetFieldDominance(m->GetFieldDominance(), &flags); BMDTimeValue frame_duration, time_scale; if (m->GetFrameRate(&frame_duration, &time_scale) != S_OK) { time_scale = 0; frame_duration = 1; } es_format_t video_fmt; vlc_fourcc_t chroma = 0; switch (fmt_flags) { case bmdDetectedVideoInputYCbCr422: chroma = sys->tenbits ? VLC_CODEC_I422_10L : VLC_CODEC_UYVY; break; case bmdDetectedVideoInputRGB444: chroma = VLC_CODEC_ARGB; break; default: msg_Err(demux, "Unsupported input format"); break; } es_format_Init(&video_fmt, VIDEO_ES, chroma); video_fmt.video.i_chroma = chroma; video_fmt.video.i_width = m->GetWidth(); video_fmt.video.i_height = m->GetHeight(); video_fmt.video.i_sar_num = 1; video_fmt.video.i_sar_den = 1; video_fmt.video.i_frame_rate = time_scale; video_fmt.video.i_frame_rate_base = frame_duration; video_fmt.i_bitrate = video_fmt.video.i_width * video_fmt.video.i_height * video_fmt.video.i_frame_rate * 2 * 8; unsigned aspect_num, aspect_den; if (!var_InheritURational(demux, &aspect_num, &aspect_den, "decklink-aspect-ratio") && aspect_num > 0 && aspect_den > 0) { video_fmt.video.i_sar_num = aspect_num * video_fmt.video.i_height; video_fmt.video.i_sar_den = aspect_den * video_fmt.video.i_width; } sys->dominance_flags = flags; return video_fmt; } class DeckLinkCaptureDelegate : public IDeckLinkInputCallback { public: DeckLinkCaptureDelegate(demux_t *demux) : demux_(demux) { m_ref_.store(1); } virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID, LPVOID *) { return E_NOINTERFACE; } virtual ULONG STDMETHODCALLTYPE AddRef(void) { return m_ref_.fetch_add(1); } virtual ULONG STDMETHODCALLTYPE Release(void) { uintptr_t new_ref = m_ref_.fetch_sub(1); if (new_ref == 0) delete this; return new_ref; } virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(BMDVideoInputFormatChangedEvents events, IDeckLinkDisplayMode *mode, BMDDetectedVideoInputFormatFlags flags) { demux_sys_t *sys = demux_->p_sys; if( !(events & bmdVideoInputDisplayModeChanged )) return S_OK; const char *mode_name; if (mode->GetName(&mode_name) != S_OK) mode_name = "unknown"; msg_Dbg(demux_, "Video input format changed to %s", mode_name); if (!sys->autodetect) { msg_Err(demux_, "Video format detection disabled"); return S_OK; } BMDPixelFormat fmt = 0; switch (flags) { case bmdDetectedVideoInputYCbCr422: fmt = sys->tenbits ? bmdFormat10BitYUV : bmdFormat8BitYUV; break; case bmdDetectedVideoInputRGB444: fmt = bmdFormat8BitARGB; break; default: msg_Err(demux_, "Unsupported input format"); return S_OK; } es_out_Del(demux_->out, sys->video_es); sys->video_fmt = GetModeSettings(demux_, mode, flags); sys->video_es = es_out_Add(demux_->out, &sys->video_fmt); sys->input->PauseStreams(); sys->input->EnableVideoInput( mode->GetDisplayMode(), fmt, bmdVideoInputEnableFormatDetection ); sys->input->FlushStreams(); sys->input->StartStreams(); return S_OK; } virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(IDeckLinkVideoInputFrame*, IDeckLinkAudioInputPacket*); private: std::atomic_uint m_ref_; demux_t *demux_; }; HRESULT DeckLinkCaptureDelegate::VideoInputFrameArrived(IDeckLinkVideoInputFrame* videoFrame, IDeckLinkAudioInputPacket* audioFrame) { demux_sys_t *sys = demux_->p_sys; if (videoFrame) { if (videoFrame->GetFlags() & bmdFrameHasNoInputSource) { msg_Warn(demux_, "No input signal detected (%dx%d)", videoFrame->GetWidth(), videoFrame->GetHeight()); return S_OK; } const int width = videoFrame->GetWidth(); const int height = videoFrame->GetHeight(); const int stride = videoFrame->GetRowBytes(); int bpp = 0; switch (sys->video_fmt.i_codec) { case VLC_CODEC_I422_10L: case VLC_CODEC_ARGB: bpp = 4; break; case VLC_CODEC_UYVY: bpp = 2; break; }; block_t *video_frame = block_Alloc(width * height * bpp); if (!video_frame) return S_OK; const uint32_t *frame_bytes; videoFrame->GetBytes((void**)&frame_bytes); BMDTimeValue stream_time, frame_duration; videoFrame->GetStreamTime(&stream_time, &frame_duration, CLOCK_FREQ); video_frame->i_flags = BLOCK_FLAG_TYPE_I | sys->dominance_flags; video_frame->i_pts = video_frame->i_dts = VLC_TICK_0 + stream_time; if (sys->video_fmt.i_codec == VLC_CODEC_I422_10L) { v210_convert((uint16_t*)video_frame->p_buffer, frame_bytes, width, height); IDeckLinkVideoFrameAncillary *vanc; if (videoFrame->GetAncillaryData(&vanc) == S_OK) { for (int i = 1; i < 21; i++) { uint32_t *buf; if (vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) != S_OK) break; uint16_t dec[width * 2]; v210_convert(&dec[0], buf, width, 1); block_t *cc = vanc_to_cc(demux_, dec, width * 2); if (!cc) continue; cc->i_pts = cc->i_dts = VLC_TICK_0 + stream_time; if (!sys->cc_es) { es_format_t fmt; es_format_Init( &fmt, SPU_ES, VLC_CODEC_CEA608 ); fmt.psz_description = strdup(N_("Closed captions 1")); if (fmt.psz_description) { sys->cc_es = es_out_Add(demux_->out, &fmt); msg_Dbg(demux_, "Adding Closed captions stream"); } } if (sys->cc_es) es_out_Send(demux_->out, sys->cc_es, cc); else block_Release(cc); break; // we found the line with Closed Caption data } vanc->Release(); } } else if (sys->video_fmt.i_codec == VLC_CODEC_UYVY) { for (int y = 0; y < height; ++y) { const uint8_t *src = (const uint8_t *)frame_bytes + stride * y; uint8_t *dst = video_frame->p_buffer + width * 2 * y; memcpy(dst, src, width * 2); } } else { memcpy(video_frame->p_buffer, frame_bytes, width * height * bpp); } vlc_mutex_lock(&sys->pts_lock); if (video_frame->i_pts > sys->last_pts) sys->last_pts = video_frame->i_pts; vlc_mutex_unlock(&sys->pts_lock); es_out_SetPCR(demux_->out, video_frame->i_pts); es_out_Send(demux_->out, sys->video_es, video_frame); } if (audioFrame) { const int bytes = audioFrame->GetSampleFrameCount() * sizeof(int16_t) * sys->channels; block_t *audio_frame = block_Alloc(bytes); if (!audio_frame) return S_OK; void *frame_bytes; audioFrame->GetBytes(&frame_bytes); memcpy(audio_frame->p_buffer, frame_bytes, bytes); BMDTimeValue packet_time; audioFrame->GetPacketTime(&packet_time, CLOCK_FREQ); audio_frame->i_pts = audio_frame->i_dts = VLC_TICK_0 + packet_time; vlc_mutex_lock(&sys->pts_lock); if (audio_frame->i_pts > sys->last_pts) sys->last_pts = audio_frame->i_pts; vlc_mutex_unlock(&sys->pts_lock); es_out_SetPCR(demux_->out, audio_frame->i_pts); es_out_Send(demux_->out, sys->audio_es, audio_frame); } return S_OK; } static int GetAudioConn(demux_t *demux) { demux_sys_t *sys = demux->p_sys; char *opt = var_CreateGetNonEmptyString(demux, "decklink-audio-connection"); if (!opt) return VLC_SUCCESS; BMDAudioConnection c; if (!strcmp(opt, "embedded")) c = bmdAudioConnectionEmbedded; else if (!strcmp(opt, "aesebu")) c = bmdAudioConnectionAESEBU; else if (!strcmp(opt, "analog")) c = bmdAudioConnectionAnalog; else { msg_Err(demux, "Invalid audio-connection: `%s\' specified", opt); free(opt); return VLC_EGENERIC; } if (sys->config->SetInt(bmdDeckLinkConfigAudioInputConnection, c) != S_OK) { msg_Err(demux, "Failed to set audio input connection"); return VLC_EGENERIC; } return VLC_SUCCESS; } static int GetVideoConn(demux_t *demux) { demux_sys_t *sys = demux->p_sys; char *opt = var_InheritString(demux, "decklink-video-connection"); if (!opt) return VLC_SUCCESS; BMDVideoConnection c; if (!strcmp(opt, "sdi")) c = bmdVideoConnectionSDI; else if (!strcmp(opt, "hdmi")) c = bmdVideoConnectionHDMI; else if (!strcmp(opt, "opticalsdi")) c = bmdVideoConnectionOpticalSDI; else if (!strcmp(opt, "component")) c = bmdVideoConnectionComponent; else if (!strcmp(opt, "composite")) c = bmdVideoConnectionComposite; else if (!strcmp(opt, "svideo")) c = bmdVideoConnectionSVideo; else { msg_Err(demux, "Invalid video-connection: `%s\' specified", opt); free(opt); return VLC_EGENERIC; } free(opt); if (sys->config->SetInt(bmdDeckLinkConfigVideoInputConnection, c) != S_OK) { msg_Err(demux, "Failed to set video input connection"); return VLC_EGENERIC; } return VLC_SUCCESS; } static int Open(vlc_object_t *p_this) { demux_t *demux = (demux_t*)p_this; demux_sys_t *sys; int ret = VLC_EGENERIC; int card_index; int physical_channels = 0; int rate; BMDVideoInputFlags flags = bmdVideoInputFlagDefault; /* Only when selected */ if (*demux->psz_access == '\0') return VLC_EGENERIC; /* Set up demux */ demux->pf_demux = NULL; demux->pf_control = Control; demux->info.i_update = 0; demux->info.i_title = 0; demux->info.i_seekpoint = 0; demux->p_sys = sys = (demux_sys_t*)calloc(1, sizeof(demux_sys_t)); if (!sys) return VLC_ENOMEM; vlc_mutex_init(&sys->pts_lock); sys->tenbits = var_InheritBool(p_this, "decklink-tenbits"); IDeckLinkIterator *decklink_iterator = CreateDeckLinkIteratorInstance(); if (!decklink_iterator) { msg_Err(demux, "DeckLink drivers not found."); goto finish; } card_index = var_InheritInteger(demux, "decklink-card-index"); if (card_index < 0) { msg_Err(demux, "Invalid card index %d", card_index); goto finish; } for (int i = 0; i <= card_index; i++) { if (sys->card) sys->card->Release(); if (decklink_iterator->Next(&sys->card) != S_OK) { msg_Err(demux, "DeckLink PCI card %d not found", card_index); goto finish; } } const char *model_name; if (sys->card->GetModelName(&model_name) != S_OK) model_name = "unknown"; msg_Dbg(demux, "Opened DeckLink PCI card %d (%s)", card_index, model_name); if (sys->card->QueryInterface(IID_IDeckLinkInput, (void**)&sys->input) != S_OK) { msg_Err(demux, "Card has no inputs"); goto finish; } /* Set up the video and audio sources. */ if (sys->card->QueryInterface(IID_IDeckLinkConfiguration, (void**)&sys->config) != S_OK) { msg_Err(demux, "Failed to get configuration interface"); goto finish; } if (sys->card->QueryInterface(IID_IDeckLinkProfileAttributes, (void**)&sys->attributes) != S_OK) { msg_Err(demux, "Failed to get attributes interface"); goto finish; } if (GetVideoConn(demux) || GetAudioConn(demux)) goto finish; BMDPixelFormat fmt; fmt = sys->tenbits ? bmdFormat10BitYUV : bmdFormat8BitYUV; if (sys->attributes->GetFlag(BMDDeckLinkSupportsInputFormatDetection, &sys->autodetect) != S_OK) { msg_Err(demux, "Failed to query card attribute"); goto finish; } /* Get the list of display modes. */ IDeckLinkDisplayModeIterator *mode_it; if (sys->input->GetDisplayModeIterator(&mode_it) != S_OK) { msg_Err(demux, "Failed to enumerate display modes"); goto finish; } union { BMDDisplayMode id; char str[4]; } u; u.id = 0; char *mode; mode = var_CreateGetNonEmptyString(demux, "decklink-mode"); if (mode) sys->autodetect = false; // disable autodetection if mode was set if (sys->autodetect) { msg_Dbg(demux, "Card supports input format detection"); flags |= bmdVideoInputEnableFormatDetection; /* Enable a random format, we will reconfigure on format detection */ u.id = htonl(bmdModeHD1080p2997); } else { if (!mode || strlen(mode) < 3 || strlen(mode) > 4) { msg_Err(demux, "Invalid mode: \'%s\'", mode ? mode : ""); free(mode); goto finish; } msg_Dbg(demux, "Looking for mode \'%s\'", mode); memcpy(u.str, mode, 4); if (u.str[3] == '\0') u.str[3] = ' '; /* 'pal'\0 -> 'pal ' */ free(mode); } sys->video_fmt.video.i_width = 0; for (IDeckLinkDisplayMode *m;; m->Release()) { if ((mode_it->Next(&m) != S_OK) || !m) break; const char *mode_name; BMDTimeValue frame_duration, time_scale; uint32_t field_flags; const char *field = GetFieldDominance(m->GetFieldDominance(), &field_flags); BMDDisplayMode id = ntohl(m->GetDisplayMode()); if (m->GetName(&mode_name) != S_OK) mode_name = "unknown"; if (m->GetFrameRate(&frame_duration, &time_scale) != S_OK) { time_scale = 0; frame_duration = 1; } msg_Dbg(demux, "Found mode '%4.4s': %s (%dx%d, %.3f fps%s)", (char*)&id, mode_name, (int)m->GetWidth(), (int)m->GetHeight(), double(time_scale) / frame_duration, field); if (u.id == id) { sys->video_fmt = GetModeSettings(demux, m, bmdDetectedVideoInputYCbCr422); msg_Dbg(demux, "Using that mode"); } } mode_it->Release(); if (sys->video_fmt.video.i_width == 0) { msg_Err(demux, "Unknown video mode `%4.4s\' specified.", (char*)&u.id); goto finish; } if (sys->input->EnableVideoInput(htonl(u.id), fmt, flags) != S_OK) { msg_Err(demux, "Failed to enable video input"); goto finish; } /* Set up audio. */ sys->channels = var_InheritInteger(demux, "decklink-audio-channels"); switch (sys->channels) { case 0: break; case 2: physical_channels = AOUT_CHANS_STEREO; break; case 8: physical_channels = AOUT_CHANS_7_1; break; //case 16: default: msg_Err(demux, "Invalid number of channels (%d), disabling audio", sys->channels); sys->channels = 0; } rate = var_InheritInteger(demux, "decklink-audio-rate"); if (rate > 0 && sys->channels > 0) { if (sys->input->EnableAudioInput(rate, bmdAudioSampleType16bitInteger, sys->channels) != S_OK) { msg_Err(demux, "Failed to enable audio input"); goto finish; } } sys->delegate = new DeckLinkCaptureDelegate(demux); sys->input->SetCallback(sys->delegate); if (sys->input->StartStreams() != S_OK) { msg_Err(demux, "Could not start streaming from SDI card. This could be caused " "by invalid video mode or flags, access denied, or card already in use."); goto finish; } msg_Dbg(demux, "added new video es %4.4s %dx%d", (char*)&sys->video_fmt.i_codec, sys->video_fmt.video.i_width, sys->video_fmt.video.i_height); sys->video_es = es_out_Add(demux->out, &sys->video_fmt); es_format_t audio_fmt; es_format_Init(&audio_fmt, AUDIO_ES, VLC_CODEC_S16N); audio_fmt.audio.i_channels = sys->channels; audio_fmt.audio.i_physical_channels = physical_channels; audio_fmt.audio.i_rate = rate; audio_fmt.audio.i_bitspersample = 16; audio_fmt.audio.i_blockalign = audio_fmt.audio.i_channels * audio_fmt.audio.i_bitspersample / 8; audio_fmt.i_bitrate = audio_fmt.audio.i_channels * audio_fmt.audio.i_rate * audio_fmt.audio.i_bitspersample; msg_Dbg(demux, "added new audio es %4.4s %dHz %dbpp %dch", (char*)&audio_fmt.i_codec, audio_fmt.audio.i_rate, audio_fmt.audio.i_bitspersample, audio_fmt.audio.i_channels); sys->audio_es = es_out_Add(demux->out, &audio_fmt); ret = VLC_SUCCESS; finish: if (decklink_iterator) decklink_iterator->Release(); if (ret != VLC_SUCCESS) Close(p_this); return ret; } static void Close(vlc_object_t *p_this) { demux_t *demux = (demux_t *)p_this; demux_sys_t *sys = demux->p_sys; if (sys->attributes) sys->attributes->Release(); if (sys->config) sys->config->Release(); if (sys->input) { sys->input->StopStreams(); sys->input->Release(); } if (sys->card) sys->card->Release(); if (sys->delegate) sys->delegate->Release(); vlc_mutex_destroy(&sys->pts_lock); free(sys); } static int Control(demux_t *demux, int query, va_list args) { demux_sys_t *sys = demux->p_sys; bool *pb; int64_t *pi64; switch(query) { /* Special for access_demux */ case DEMUX_CAN_PAUSE: case DEMUX_CAN_SEEK: case DEMUX_CAN_CONTROL_PACE: pb = va_arg(args, bool *); *pb = false; return VLC_SUCCESS; case DEMUX_GET_PTS_DELAY: pi64 = va_arg(args, int64_t *); *pi64 = INT64_C(1000) * var_InheritInteger(demux, "live-caching"); return VLC_SUCCESS; case DEMUX_GET_TIME: pi64 = va_arg(args, int64_t *); vlc_mutex_lock(&sys->pts_lock); *pi64 = sys->last_pts; vlc_mutex_unlock(&sys->pts_lock); return VLC_SUCCESS; default: return VLC_EGENERIC; } }