/* * GStreamer DirectShow codecs wrapper * Copyright <2006, 2007, 2008> Fluendo * Copyright <2006, 2007, 2008> Pioneers of the Inevitable * Copyright <2007,2008> Sebastien Moutte * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * Alternatively, the contents of this file may be used under the * GNU Lesser General Public License Version 2.1 (the "LGPL"), in * which case the following provisions apply instead of the ones * mentioned above: * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gstdshowaudiodec.h" #include #include #include GST_DEBUG_CATEGORY_STATIC (dshowaudiodec_debug); #define GST_CAT_DEFAULT dshowaudiodec_debug GST_BOILERPLATE (GstDshowAudioDec, gst_dshowaudiodec, GstElement, GST_TYPE_ELEMENT); static const AudioCodecEntry *tmp; static void gst_dshowaudiodec_dispose (GObject * object); static GstStateChangeReturn gst_dshowaudiodec_change_state (GstElement * element, GstStateChange transition); /* sink pad overwrites */ static gboolean gst_dshowaudiodec_sink_setcaps (GstPad * pad, GstCaps * caps); static GstFlowReturn gst_dshowaudiodec_chain (GstPad * pad, GstBuffer * buffer); static gboolean gst_dshowaudiodec_sink_event (GstPad * pad, GstEvent * event); /* utils */ static gboolean gst_dshowaudiodec_create_graph_and_filters (GstDshowAudioDec * adec); static gboolean gst_dshowaudiodec_destroy_graph_and_filters (GstDshowAudioDec * adec); static gboolean gst_dshowaudiodec_flush (GstDshowAudioDec * adec); static gboolean gst_dshowaudiodec_get_filter_settings (GstDshowAudioDec * adec); static gboolean gst_dshowaudiodec_setup_graph (GstDshowAudioDec * adec, GstCaps *caps); /* All the GUIDs we want are generated from the FOURCC like this */ #define GUID_MEDIASUBTYPE_FROM_FOURCC(fourcc) \ { fourcc , 0x0000, 0x0010, \ { 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 }} /* WMA we should always use the DMO */ static PreferredFilter preferred_wma_filters[] = { {&CLSID_CWMADecMediaObject, &DMOCATEGORY_AUDIO_DECODER}, {0} }; /* Prefer the Vista (DMO) decoder if present, otherwise the XP * decoder (not a DMO), otherwise fallback to highest-merit */ static const GUID CLSID_XP_MP3_DECODER = {0x38BE3000, 0xDBF4, 0x11D0, {0x86,0x0E,0x00,0xA0,0x24,0xCF,0xEF,0x6D}}; static PreferredFilter preferred_mp3_filters[] = { {&CLSID_CMP3DecMediaObject, &DMOCATEGORY_AUDIO_DECODER}, {&CLSID_XP_MP3_DECODER}, {0} }; /* MPEG 1/2: use the MPEG Audio Decoder filter */ static const GUID CLSID_WINDOWS_MPEG_AUDIO_DECODER = {0x4A2286E0, 0x7BEF, 0x11CE, {0x9B, 0xD9, 0x00, 0x00, 0xE2, 0x02, 0x59, 0x9C}}; static PreferredFilter preferred_mpegaudio_filters[] = { {&CLSID_WINDOWS_MPEG_AUDIO_DECODER}, {0} }; static const AudioCodecEntry audio_dec_codecs[] = { {"dshowadec_wma1", "Windows Media Audio 7", WAVE_FORMAT_MSAUDIO1, "audio/x-wma, wmaversion = (int) 1", preferred_wma_filters}, {"dshowadec_wma2", "Windows Media Audio 8", WAVE_FORMAT_WMAUDIO2, "audio/x-wma, wmaversion = (int) 2", preferred_wma_filters}, {"dshowadec_wma3", "Windows Media Audio 9 Professional", WAVE_FORMAT_WMAUDIO3, "audio/x-wma, wmaversion = (int) 3", preferred_wma_filters}, {"dshowadec_wma4", "Windows Media Audio 9 Lossless", WAVE_FORMAT_WMAUDIO_LOSSLESS, "audio/x-wma, wmaversion = (int) 4", preferred_wma_filters}, {"dshowadec_wms", "Windows Media Audio Voice v9", WAVE_FORMAT_WMAVOICE9, "audio/x-wms", preferred_wma_filters}, {"dshowadec_mp3", "MPEG Layer 3 Audio", WAVE_FORMAT_MPEGLAYER3, "audio/mpeg, " "mpegversion = (int) 1, " "layer = (int)3, " "rate = (int) [ 8000, 48000 ], " "channels = (int) [ 1, 2 ], " "parsed= (boolean) true", preferred_mp3_filters}, {"dshowadec_mpeg_1_2", "MPEG Layer 1,2 Audio", WAVE_FORMAT_MPEG, "audio/mpeg, " "mpegversion = (int) 1, " "layer = (int) [ 1, 2 ], " "rate = (int) [ 8000, 48000 ], " "channels = (int) [ 1, 2 ], " "parsed= (boolean) true", preferred_mpegaudio_filters}, }; HRESULT AudioFakeSink::DoRenderSample(IMediaSample *pMediaSample) { GstBuffer *out_buf = NULL; gboolean in_seg = FALSE; GstClockTime buf_start, buf_stop; gint64 clip_start = 0, clip_stop = 0; guint start_offset = 0, stop_offset; GstClockTime duration; if(pMediaSample) { BYTE *pBuffer = NULL; LONGLONG lStart = 0, lStop = 0; long size = pMediaSample->GetActualDataLength(); pMediaSample->GetPointer(&pBuffer); pMediaSample->GetTime(&lStart, &lStop); if (!GST_CLOCK_TIME_IS_VALID (mDec->timestamp)) { // Convert REFERENCE_TIME to GST_CLOCK_TIME mDec->timestamp = (GstClockTime)lStart * 100; } duration = (lStop - lStart) * 100; buf_start = mDec->timestamp; buf_stop = mDec->timestamp + duration; /* save stop position to start next buffer with it */ mDec->timestamp = buf_stop; /* check if this buffer is in our current segment */ in_seg = gst_segment_clip (mDec->segment, GST_FORMAT_TIME, buf_start, buf_stop, &clip_start, &clip_stop); /* if the buffer is out of segment do not push it downstream */ if (!in_seg) { GST_DEBUG_OBJECT (mDec, "buffer is out of segment, start %" GST_TIME_FORMAT " stop %" GST_TIME_FORMAT, GST_TIME_ARGS (buf_start), GST_TIME_ARGS (buf_stop)); goto done; } /* buffer is entirely or partially in-segment, so allocate a * GstBuffer for output, and clip if required */ /* allocate a new buffer for raw audio */ mDec->last_ret = gst_pad_alloc_buffer (mDec->srcpad, GST_BUFFER_OFFSET_NONE, size, GST_PAD_CAPS (mDec->srcpad), &out_buf); if (!out_buf) { GST_WARNING_OBJECT (mDec, "cannot allocate a new GstBuffer"); goto done; } /* set buffer properties */ GST_BUFFER_TIMESTAMP (out_buf) = buf_start; GST_BUFFER_DURATION (out_buf) = duration; memcpy (GST_BUFFER_DATA (out_buf), pBuffer, MIN ((unsigned int)size, GST_BUFFER_SIZE (out_buf))); /* we have to remove some heading samples */ if ((GstClockTime) clip_start > buf_start) { start_offset = (guint)gst_util_uint64_scale_int (clip_start - buf_start, mDec->rate, GST_SECOND) * mDec->depth / 8 * mDec->channels; } else start_offset = 0; /* we have to remove some trailing samples */ if ((GstClockTime) clip_stop < buf_stop) { stop_offset = (guint)gst_util_uint64_scale_int (buf_stop - clip_stop, mDec->rate, GST_SECOND) * mDec->depth / 8 * mDec->channels; } else stop_offset = size; /* truncating */ if ((start_offset != 0) || (stop_offset != (size_t) size)) { GstBuffer *subbuf = gst_buffer_create_sub (out_buf, start_offset, stop_offset - start_offset); if (subbuf) { gst_buffer_set_caps (subbuf, GST_PAD_CAPS (mDec->srcpad)); gst_buffer_unref (out_buf); out_buf = subbuf; } } GST_BUFFER_TIMESTAMP (out_buf) = clip_start; GST_BUFFER_DURATION (out_buf) = clip_stop - clip_start; /* replace the saved stop position by the clipped one */ mDec->timestamp = clip_stop; GST_DEBUG_OBJECT (mDec, "push_buffer (size %d)=> pts %" GST_TIME_FORMAT " stop %" GST_TIME_FORMAT " duration %" GST_TIME_FORMAT, size, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (out_buf)), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (out_buf) + GST_BUFFER_DURATION (out_buf)), GST_TIME_ARGS (GST_BUFFER_DURATION (out_buf))); mDec->last_ret = gst_pad_push (mDec->srcpad, out_buf); } done: return S_OK; } HRESULT AudioFakeSink::CheckMediaType(const CMediaType *pmt) { if(pmt != NULL) { /* The Vista MP3 decoder (and possibly others?) outputs an * AM_MEDIA_TYPE with the wrong cbFormat. So, rather than using * CMediaType.operator==, we implement a sufficient check ourselves. * I think this is a bug in the MP3 decoder. */ if (IsEqualGUID (pmt->majortype, m_MediaType.majortype) && IsEqualGUID (pmt->subtype, m_MediaType.subtype) && IsEqualGUID (pmt->formattype, m_MediaType.formattype)) { /* Types are the same at the top-level. Now, we need to compare * the format blocks. * We special case WAVEFORMATEX to not check that * pmt->cbFormat == m_MediaType.cbFormat, though the actual format * blocks must still be the same. */ if (pmt->formattype == FORMAT_WaveFormatEx) { if (pmt->cbFormat >= sizeof (WAVEFORMATEX) && m_MediaType.cbFormat >= sizeof (WAVEFORMATEX)) { WAVEFORMATEX *wf1 = (WAVEFORMATEX *)pmt->pbFormat; WAVEFORMATEX *wf2 = (WAVEFORMATEX *)m_MediaType.pbFormat; if (wf1->cbSize == wf2->cbSize && memcmp (wf1, wf2, sizeof(WAVEFORMATEX) + wf1->cbSize) == 0) return S_OK; } } else { if (pmt->cbFormat == m_MediaType.cbFormat && pmt->cbFormat == 0 || (pmt->pbFormat != NULL && m_MediaType.pbFormat != NULL && memcmp (pmt->pbFormat, m_MediaType.pbFormat, pmt->cbFormat) == 0)) return S_OK; } } } return S_FALSE; } static void gst_dshowaudiodec_base_init (gpointer klass) { GstDshowAudioDecClass *audiodec_class = (GstDshowAudioDecClass *) klass; GstPadTemplate *src, *sink; GstCaps *srccaps, *sinkcaps; GstElementClass *element_class = GST_ELEMENT_CLASS (klass); char *description; audiodec_class->entry = tmp; description = g_strdup_printf ("DirectShow %s Decoder Wrapper", tmp->element_longname); gst_element_class_set_details_simple (element_class, description, "Codec/Decoder/Audio", description, "Sebastien Moutte "); g_free (description); sinkcaps = gst_caps_from_string (tmp->sinkcaps); srccaps = gst_caps_from_string ( "audio/x-raw-int," "width = (int)[1, 32]," "depth = (int)[1, 32]," "rate = (int)[1, MAX]," "channels = (int)[1, MAX]," "signed = (boolean)true," "endianness = (int)" G_STRINGIFY(G_LITTLE_ENDIAN)); sink = gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, sinkcaps); src = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, srccaps); /* register */ gst_element_class_add_pad_template (element_class, src); gst_element_class_add_pad_template (element_class, sink); } static void gst_dshowaudiodec_class_init (GstDshowAudioDecClass * klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass); gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_dshowaudiodec_dispose); gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_dshowaudiodec_change_state); parent_class = (GstElementClass *) g_type_class_peek_parent (klass); } static void gst_dshowaudiodec_init (GstDshowAudioDec * adec, GstDshowAudioDecClass * adec_class) { GstElementClass *element_class = GST_ELEMENT_GET_CLASS (adec); HRESULT hr; /* setup pads */ adec->sinkpad = gst_pad_new_from_template (gst_element_class_get_pad_template (element_class, "sink"), "sink"); gst_pad_set_setcaps_function (adec->sinkpad, gst_dshowaudiodec_sink_setcaps); gst_pad_set_event_function (adec->sinkpad, gst_dshowaudiodec_sink_event); gst_pad_set_chain_function (adec->sinkpad, gst_dshowaudiodec_chain); gst_element_add_pad (GST_ELEMENT (adec), adec->sinkpad); adec->srcpad = gst_pad_new_from_template (gst_element_class_get_pad_template (element_class, "src"), "src"); gst_element_add_pad (GST_ELEMENT (adec), adec->srcpad); adec->fakesrc = NULL; adec->fakesink = NULL; adec->decfilter = 0; adec->filtergraph = 0; adec->mediafilter = 0; adec->timestamp = GST_CLOCK_TIME_NONE; adec->segment = gst_segment_new (); adec->setup = FALSE; adec->depth = 0; adec->bitrate = 0; adec->block_align = 0; adec->channels = 0; adec->rate = 0; adec->layer = 0; adec->codec_data = NULL; adec->last_ret = GST_FLOW_OK; hr = CoInitialize (0); if (SUCCEEDED(hr)) { adec->comInitialized = TRUE; } } static void gst_dshowaudiodec_dispose (GObject * object) { GstDshowAudioDec *adec = (GstDshowAudioDec *) (object); if (adec->segment) { gst_segment_free (adec->segment); adec->segment = NULL; } if (adec->codec_data) { gst_buffer_unref (adec->codec_data); adec->codec_data = NULL; } if (adec->comInitialized) { CoUninitialize (); adec->comInitialized = FALSE; } G_OBJECT_CLASS (parent_class)->dispose (object); } static GstStateChangeReturn gst_dshowaudiodec_change_state (GstElement * element, GstStateChange transition) { GstDshowAudioDec *adec = (GstDshowAudioDec *) (element); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: if (!gst_dshowaudiodec_create_graph_and_filters (adec)) return GST_STATE_CHANGE_FAILURE; break; case GST_STATE_CHANGE_READY_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_PLAYING: break; case GST_STATE_CHANGE_PLAYING_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_READY: adec->depth = 0; adec->bitrate = 0; adec->block_align = 0; adec->channels = 0; adec->rate = 0; adec->layer = 0; if (adec->codec_data) { gst_buffer_unref (adec->codec_data); adec->codec_data = NULL; } break; case GST_STATE_CHANGE_READY_TO_NULL: if (!gst_dshowaudiodec_destroy_graph_and_filters (adec)) return GST_STATE_CHANGE_FAILURE; break; default: break; } return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); } static gboolean gst_dshowaudiodec_sink_setcaps (GstPad * pad, GstCaps * caps) { gboolean ret = FALSE; GstDshowAudioDec *adec = (GstDshowAudioDec *) gst_pad_get_parent (pad); GstStructure *s = gst_caps_get_structure (caps, 0); const GValue *v = NULL; adec->timestamp = GST_CLOCK_TIME_NONE; /* read data, only rate and channels are needed */ if (!gst_structure_get_int (s, "rate", &adec->rate) || !gst_structure_get_int (s, "channels", &adec->channels)) { GST_ELEMENT_ERROR (adec, CORE, NEGOTIATION, ("error getting audio specs from caps"), (NULL)); goto end; } gst_structure_get_int (s, "depth", &adec->depth); gst_structure_get_int (s, "bitrate", &adec->bitrate); gst_structure_get_int (s, "block_align", &adec->block_align); gst_structure_get_int (s, "layer", &adec->layer); if (adec->codec_data) { gst_buffer_unref (adec->codec_data); adec->codec_data = NULL; } if ((v = gst_structure_get_value (s, "codec_data"))) adec->codec_data = gst_buffer_ref (gst_value_get_buffer (v)); ret = gst_dshowaudiodec_setup_graph (adec, caps); end: gst_object_unref (adec); return ret; } static GstFlowReturn gst_dshowaudiodec_chain (GstPad * pad, GstBuffer * buffer) { GstDshowAudioDec *adec = (GstDshowAudioDec *) gst_pad_get_parent (pad); bool discont = FALSE; if (!adec->setup) { /* we are not set up */ GST_WARNING_OBJECT (adec, "Decoder not set up, failing"); adec->last_ret = GST_FLOW_WRONG_STATE; goto beach; } if (GST_FLOW_IS_FATAL (adec->last_ret)) { GST_DEBUG_OBJECT (adec, "last decoding iteration generated a fatal error " "%s", gst_flow_get_name (adec->last_ret)); goto beach; } GST_CAT_DEBUG_OBJECT (dshowaudiodec_debug, adec, "chain (size %d)=> pts %" GST_TIME_FORMAT " stop %" GST_TIME_FORMAT, GST_BUFFER_SIZE (buffer), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer))); /* if the incoming buffer has discont flag set => flush decoder data */ if (buffer && GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT)) { GST_CAT_DEBUG_OBJECT (dshowaudiodec_debug, adec, "this buffer has a DISCONT flag (%" GST_TIME_FORMAT "), flushing", GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer))); gst_dshowaudiodec_flush (adec); discont = TRUE; } /* push the buffer to the directshow decoder */ adec->fakesrc->GetOutputPin()->PushBuffer ( GST_BUFFER_DATA (buffer), GST_BUFFER_TIMESTAMP (buffer), GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer), GST_BUFFER_SIZE (buffer), (bool)discont); beach: gst_buffer_unref (buffer); gst_object_unref (adec); return adec->last_ret; } static gboolean gst_dshowaudiodec_sink_event (GstPad * pad, GstEvent * event) { gboolean ret = TRUE; GstDshowAudioDec *adec = (GstDshowAudioDec *) gst_pad_get_parent (pad); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_FLUSH_STOP:{ gst_dshowaudiodec_flush (adec); ret = gst_pad_event_default (pad, event); break; } case GST_EVENT_NEWSEGMENT: { GstFormat format; gdouble rate; gint64 start, stop, time; gboolean update; gst_event_parse_new_segment (event, &update, &rate, &format, &start, &stop, &time); GST_CAT_DEBUG_OBJECT (dshowaudiodec_debug, adec, "received new segment from %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT, GST_TIME_ARGS (start), GST_TIME_ARGS (stop)); if (update) { GST_CAT_DEBUG_OBJECT (dshowaudiodec_debug, adec, "closing current segment flushing.."); gst_dshowaudiodec_flush (adec); } /* save the new segment in our local current segment */ gst_segment_set_newsegment (adec->segment, update, rate, format, start, stop, time); ret = gst_pad_event_default (pad, event); break; } default: ret = gst_pad_event_default (pad, event); break; } gst_object_unref (adec); return ret; } static gboolean gst_dshowaudiodec_flush (GstDshowAudioDec * adec) { if (!adec->fakesrc) return FALSE; /* flush dshow decoder and reset timestamp */ adec->fakesrc->GetOutputPin()->Flush(); adec->timestamp = GST_CLOCK_TIME_NONE; adec->last_ret = GST_FLOW_OK; return TRUE; } static AM_MEDIA_TYPE * dshowaudiodec_set_input_format (GstDshowAudioDec *adec, GstCaps *caps) { AM_MEDIA_TYPE *mediatype; WAVEFORMATEX *format; GstDshowAudioDecClass *klass = (GstDshowAudioDecClass *) G_OBJECT_GET_CLASS (adec); const AudioCodecEntry *codec_entry = klass->entry; int size; mediatype = (AM_MEDIA_TYPE *)g_malloc0 (sizeof(AM_MEDIA_TYPE)); mediatype->majortype = MEDIATYPE_Audio; GUID subtype = GUID_MEDIASUBTYPE_FROM_FOURCC (0x00000000); subtype.Data1 = codec_entry->format; mediatype->subtype = subtype; mediatype->bFixedSizeSamples = TRUE; mediatype->bTemporalCompression = FALSE; if (adec->block_align) mediatype->lSampleSize = adec->block_align; else mediatype->lSampleSize = 8192; /* need to evaluate it dynamically */ mediatype->formattype = FORMAT_WaveFormatEx; /* We need this special behaviour for layers 1 and 2 (layer 3 uses a different * decoder which doesn't need this */ if (adec->layer == 1 || adec->layer == 2) { MPEG1WAVEFORMAT *mpeg1_format; int samples, version; GstStructure *structure = gst_caps_get_structure (caps, 0); size = sizeof (MPEG1WAVEFORMAT); format = (WAVEFORMATEX *)g_malloc0 (size); format->cbSize = sizeof (MPEG1WAVEFORMAT) - sizeof (WAVEFORMATEX); format->wFormatTag = WAVE_FORMAT_MPEG; mpeg1_format = (MPEG1WAVEFORMAT *) format; mpeg1_format->wfx.nChannels = adec->channels; if (adec->channels == 2) mpeg1_format->fwHeadMode = ACM_MPEG_STEREO; else mpeg1_format->fwHeadMode = ACM_MPEG_SINGLECHANNEL; mpeg1_format->fwHeadModeExt = 0; mpeg1_format->wHeadEmphasis = 0; mpeg1_format->fwHeadFlags = 0; switch (adec->layer) { case 1: mpeg1_format->fwHeadLayer = ACM_MPEG_LAYER3; break; case 2: mpeg1_format->fwHeadLayer = ACM_MPEG_LAYER2; break; case 3: mpeg1_format->fwHeadLayer = ACM_MPEG_LAYER1; break; }; gst_structure_get_int (structure, "mpegaudioversion", &version); if (adec->layer == 1) { samples = 384; } else { if (version == 1) { samples = 576; } else { samples = 1152; } } mpeg1_format->wfx.nBlockAlign = (WORD) samples; mpeg1_format->wfx.nSamplesPerSec = adec->rate; mpeg1_format->dwHeadBitrate = 128000; /* This doesn't seem to matter */ mpeg1_format->wfx.nAvgBytesPerSec = mpeg1_format->dwHeadBitrate / 8; } else { size = sizeof (WAVEFORMATEX) + (adec->codec_data ? GST_BUFFER_SIZE (adec->codec_data) : 0); if (adec->layer == 3) { MPEGLAYER3WAVEFORMAT *mp3format; /* The WinXP mp3 decoder doesn't actually check the size of this structure, * but requires that this be allocated and filled out (or we get obscure * random crashes) */ size = sizeof (MPEGLAYER3WAVEFORMAT); mp3format = (MPEGLAYER3WAVEFORMAT *)g_malloc0 (size); format = (WAVEFORMATEX *)mp3format; format->cbSize = MPEGLAYER3_WFX_EXTRA_BYTES; mp3format->wID = MPEGLAYER3_ID_MPEG; mp3format->fdwFlags = MPEGLAYER3_FLAG_PADDING_ISO; /* No idea what this means for a decoder */ /* The XP decoder divides by nBlockSize, so we must set this to a non-zero value, but it doesn't matter what - this is meaningless for VBR mp3 anyway */ mp3format->nBlockSize = 1; mp3format->nFramesPerBlock = 1; mp3format->nCodecDelay = 0; } else { format = (WAVEFORMATEX *)g_malloc0 (size); if (adec->codec_data) { /* Codec data is appended after our header */ memcpy (((guchar *) format) + sizeof (WAVEFORMATEX), GST_BUFFER_DATA (adec->codec_data), GST_BUFFER_SIZE (adec->codec_data)); format->cbSize = GST_BUFFER_SIZE (adec->codec_data); } } format->wFormatTag = codec_entry->format; format->nChannels = adec->channels; format->nSamplesPerSec = adec->rate; format->nAvgBytesPerSec = adec->bitrate / 8; format->nBlockAlign = adec->block_align; format->wBitsPerSample = adec->depth; } mediatype->cbFormat = size; mediatype->pbFormat = (BYTE *) format; return mediatype; } static AM_MEDIA_TYPE * dshowaudiodec_set_output_format (GstDshowAudioDec *adec) { AM_MEDIA_TYPE *mediatype; WAVEFORMATEX *format; GstDshowAudioDecClass *klass = (GstDshowAudioDecClass *) G_OBJECT_GET_CLASS (adec); const AudioCodecEntry *codec_entry = klass->entry; if (!gst_dshowaudiodec_get_filter_settings (adec)) { return NULL; } format = (WAVEFORMATEX *)g_malloc0(sizeof (WAVEFORMATEX)); format->wFormatTag = WAVE_FORMAT_PCM; format->wBitsPerSample = adec->depth; format->nChannels = adec->channels; format->nBlockAlign = adec->channels * (adec->depth / 8); format->nSamplesPerSec = adec->rate; format->nAvgBytesPerSec = format->nBlockAlign * adec->rate; mediatype = (AM_MEDIA_TYPE *)g_malloc0(sizeof (AM_MEDIA_TYPE)); mediatype->majortype = MEDIATYPE_Audio; GUID subtype = GUID_MEDIASUBTYPE_FROM_FOURCC (WAVE_FORMAT_PCM); mediatype->subtype = subtype; mediatype->bFixedSizeSamples = TRUE; mediatype->bTemporalCompression = FALSE; mediatype->lSampleSize = format->nBlockAlign; mediatype->formattype = FORMAT_WaveFormatEx; mediatype->cbFormat = sizeof (WAVEFORMATEX); mediatype->pbFormat = (BYTE *)format; return mediatype; } static void dshowadec_free_mediatype (AM_MEDIA_TYPE *mediatype) { if (mediatype->pbFormat) g_free (mediatype->pbFormat); g_free (mediatype); } static gboolean gst_dshowaudiodec_setup_graph (GstDshowAudioDec * adec, GstCaps *caps) { gboolean ret = FALSE; GstDshowAudioDecClass *klass = (GstDshowAudioDecClass *) G_OBJECT_GET_CLASS (adec); HRESULT hres; GstCaps *outcaps; AM_MEDIA_TYPE *output_mediatype = NULL; AM_MEDIA_TYPE *input_mediatype = NULL; CComPtr output_pin; CComPtr input_pin; const AudioCodecEntry *codec_entry = klass->entry; CComQIPtr srcfilter; CComQIPtr sinkfilter; input_mediatype = dshowaudiodec_set_input_format (adec, caps); adec->fakesrc->GetOutputPin()->SetMediaType (input_mediatype); srcfilter = adec->fakesrc; /* connect our fake source to decoder */ output_pin = gst_dshow_get_pin_from_filter (srcfilter, PINDIR_OUTPUT); if (!output_pin) { GST_ELEMENT_ERROR (adec, CORE, NEGOTIATION, ("Can't get output pin from our directshow fakesrc filter"), (NULL)); goto end; } input_pin = gst_dshow_get_pin_from_filter (adec->decfilter, PINDIR_INPUT); if (!input_pin) { GST_ELEMENT_ERROR (adec, CORE, NEGOTIATION, ("Can't get input pin from decoder filter"), (NULL)); goto end; } hres = adec->filtergraph->ConnectDirect (output_pin, input_pin, NULL); if (hres != S_OK) { GST_ELEMENT_ERROR (adec, CORE, NEGOTIATION, ("Can't connect fakesrc with decoder (error=%x)", hres), (NULL)); goto end; } output_mediatype = dshowaudiodec_set_output_format (adec); if (!output_mediatype) { GST_ELEMENT_ERROR (adec, CORE, NEGOTIATION, ("Can't get audio output format from decoder"), (NULL)); goto end; } adec->fakesink->SetMediaType(output_mediatype); outcaps = gst_caps_new_simple ("audio/x-raw-int", "width", G_TYPE_INT, adec->depth, "depth", G_TYPE_INT, adec->depth, "rate", G_TYPE_INT, adec->rate, "channels", G_TYPE_INT, adec->channels, "signed", G_TYPE_BOOLEAN, TRUE, "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, NULL); if (!gst_pad_set_caps (adec->srcpad, outcaps)) { gst_caps_unref (outcaps); GST_ELEMENT_ERROR (adec, CORE, NEGOTIATION, ("Failed to negotiate output"), (NULL)); goto end; } gst_caps_unref (outcaps); /* connect the decoder to our fake sink */ output_pin = gst_dshow_get_pin_from_filter (adec->decfilter, PINDIR_OUTPUT); if (!output_pin) { GST_ELEMENT_ERROR (adec, CORE, NEGOTIATION, ("Can't get output pin from our decoder filter"), (NULL)); goto end; } sinkfilter = adec->fakesink; input_pin = gst_dshow_get_pin_from_filter (sinkfilter, PINDIR_INPUT); if (!input_pin) { GST_ELEMENT_ERROR (adec, CORE, NEGOTIATION, ("Can't get input pin from our directshow fakesink filter"), (NULL)); goto end; } hres = adec->filtergraph->ConnectDirect(output_pin, input_pin, NULL); if (hres != S_OK) { GST_ELEMENT_ERROR (adec, CORE, NEGOTIATION, ("Can't connect decoder with fakesink (error=%x)", hres), (NULL)); goto end; } hres = adec->mediafilter->Run (-1); if (hres != S_OK) { GST_ELEMENT_ERROR (adec, CORE, NEGOTIATION, ("Can't run the directshow graph (error=%x)", hres), (NULL)); goto end; } ret = TRUE; adec->setup = TRUE; end: if (input_mediatype) dshowadec_free_mediatype (input_mediatype); if (output_mediatype) dshowadec_free_mediatype (output_mediatype); return ret; } static gboolean gst_dshowaudiodec_get_filter_settings (GstDshowAudioDec * adec) { CComPtr output_pin; CComPtr enum_mediatypes; HRESULT hres; ULONG fetched; BOOL ret = FALSE; if (adec->decfilter == 0) return FALSE; output_pin = gst_dshow_get_pin_from_filter (adec->decfilter, PINDIR_OUTPUT); if (!output_pin) { GST_ELEMENT_ERROR (adec, CORE, NEGOTIATION, ("failed getting ouput pin from the decoder"), (NULL)); return FALSE; } hres = output_pin->EnumMediaTypes (&enum_mediatypes); if (hres == S_OK && enum_mediatypes) { AM_MEDIA_TYPE *mediatype = NULL; enum_mediatypes->Reset(); while (!ret && enum_mediatypes->Next(1, &mediatype, &fetched) == S_OK) { if (IsEqualGUID (mediatype->subtype, MEDIASUBTYPE_PCM) && IsEqualGUID (mediatype->formattype, FORMAT_WaveFormatEx)) { WAVEFORMATEX *audio_info = (WAVEFORMATEX *) mediatype->pbFormat; adec->channels = audio_info->nChannels; adec->depth = audio_info->wBitsPerSample; adec->rate = audio_info->nSamplesPerSec; ret = TRUE; } DeleteMediaType (mediatype); } } return ret; } static gboolean gst_dshowaudiodec_create_graph_and_filters (GstDshowAudioDec * adec) { HRESULT hres; GstDshowAudioDecClass *klass = (GstDshowAudioDecClass *) G_OBJECT_GET_CLASS (adec); CComQIPtr srcfilter; CComQIPtr sinkfilter; GUID insubtype = GUID_MEDIASUBTYPE_FROM_FOURCC (klass->entry->format); GUID outsubtype = GUID_MEDIASUBTYPE_FROM_FOURCC (WAVE_FORMAT_PCM); /* create the filter graph manager object */ hres = adec->filtergraph.CoCreateInstance ( CLSID_FilterGraph, NULL, CLSCTX_INPROC); if (FAILED (hres)) { GST_ELEMENT_ERROR (adec, STREAM, FAILED, ("Can't create an instance of the directshow graph manager (error=%d)", hres), (NULL)); goto error; } hres = adec->filtergraph->QueryInterface (&adec->mediafilter); if (FAILED (hres)) { GST_WARNING_OBJECT (adec, "Can't QI filtergraph to mediafilter"); goto error; } /* create fake src filter */ adec->fakesrc = new FakeSrc(); /* Created with a refcount of zero, so increment that */ adec->fakesrc->AddRef(); /* create decoder filter */ adec->decfilter = gst_dshow_find_filter (MEDIATYPE_Audio, insubtype, MEDIATYPE_Audio, outsubtype, klass->entry->preferred_filters); if (adec->decfilter == NULL) { GST_ELEMENT_ERROR (adec, STREAM, FAILED, ("Can't create an instance of the decoder filter"), (NULL)); goto error; } /* create fake sink filter */ adec->fakesink = new AudioFakeSink(adec); /* Created with a refcount of zero, so increment that */ adec->fakesink->AddRef(); /* add filters to the graph */ srcfilter = adec->fakesrc; hres = adec->filtergraph->AddFilter (srcfilter, L"src"); if (hres != S_OK) { GST_ELEMENT_ERROR (adec, STREAM, FAILED, ("Can't add fakesrc filter to the graph (error=%d)", hres), (NULL)); goto error; } hres = adec->filtergraph->AddFilter(adec->decfilter, L"decoder"); if (hres != S_OK) { GST_ELEMENT_ERROR (adec, STREAM, FAILED, ("Can't add decoder filter to the graph (error=%d)", hres), (NULL)); goto error; } sinkfilter = adec->fakesink; hres = adec->filtergraph->AddFilter(sinkfilter, L"sink"); if (hres != S_OK) { GST_ELEMENT_ERROR (adec, STREAM, FAILED, ("Can't add fakesink filter to the graph (error=%d)", hres), (NULL)); goto error; } return TRUE; error: if (adec->fakesrc) { adec->fakesrc->Release(); adec->fakesrc = NULL; } if (adec->fakesink) { adec->fakesink->Release(); adec->fakesink = NULL; } adec->decfilter = 0; adec->mediafilter = 0; adec->filtergraph = 0; return FALSE; } static gboolean gst_dshowaudiodec_destroy_graph_and_filters (GstDshowAudioDec * adec) { if (adec->mediafilter) { adec->mediafilter->Stop(); } if (adec->fakesrc) { if (adec->filtergraph) { CComQIPtr filter = adec->fakesrc; adec->filtergraph->RemoveFilter(filter); } adec->fakesrc->Release(); adec->fakesrc = NULL; } if (adec->decfilter) { if (adec->filtergraph) adec->filtergraph->RemoveFilter(adec->decfilter); adec->decfilter = 0; } if (adec->fakesink) { if (adec->filtergraph) { CComQIPtr filter = adec->fakesink; adec->filtergraph->RemoveFilter(filter); } adec->fakesink->Release(); adec->fakesink = NULL; } adec->mediafilter = 0; adec->filtergraph = 0; adec->setup = FALSE; return TRUE; } gboolean dshow_adec_register (GstPlugin * plugin) { GTypeInfo info = { sizeof (GstDshowAudioDecClass), (GBaseInitFunc) gst_dshowaudiodec_base_init, NULL, (GClassInitFunc) gst_dshowaudiodec_class_init, NULL, NULL, sizeof (GstDshowAudioDec), 0, (GInstanceInitFunc) gst_dshowaudiodec_init, }; gint i; HRESULT hr; GST_DEBUG_CATEGORY_INIT (dshowaudiodec_debug, "dshowaudiodec", 0, "Directshow filter audio decoder"); hr = CoInitialize(0); for (i = 0; i < sizeof (audio_dec_codecs) / sizeof (AudioCodecEntry); i++) { GType type; CComPtr filter; GUID insubtype = GUID_MEDIASUBTYPE_FROM_FOURCC (audio_dec_codecs[i].format); GUID outsubtype = GUID_MEDIASUBTYPE_FROM_FOURCC (WAVE_FORMAT_PCM); filter = gst_dshow_find_filter (MEDIATYPE_Audio, insubtype, MEDIATYPE_Audio, outsubtype, audio_dec_codecs[i].preferred_filters); if (filter) { GST_DEBUG ("Registering %s", audio_dec_codecs[i].element_name); tmp = &audio_dec_codecs[i]; type = g_type_register_static (GST_TYPE_ELEMENT, audio_dec_codecs[i].element_name, &info, (GTypeFlags)0); if (!gst_element_register (plugin, audio_dec_codecs[i].element_name, GST_RANK_SECONDARY, type)) { return FALSE; } GST_CAT_DEBUG (dshowaudiodec_debug, "Registered %s", audio_dec_codecs[i].element_name); } else { GST_DEBUG ("Element %s not registered " "(the format is not supported by the system)", audio_dec_codecs[i].element_name); } } if (SUCCEEDED(hr)) CoUninitialize (); return TRUE; }