/* * Copyright (C) 2014, Sebastian Dröge <sebastian@centricular.com> * * This library 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 * version 2.1 of the License. * * 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 library; 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 <gst/gst.h> #include "gstomxmp3dec.h" GST_DEBUG_CATEGORY_STATIC (gst_omx_mp3_dec_debug_category); #define GST_CAT_DEFAULT gst_omx_mp3_dec_debug_category /* prototypes */ static gboolean gst_omx_mp3_dec_set_format (GstOMXAudioDec * dec, GstOMXPort * port, GstCaps * caps); static gboolean gst_omx_mp3_dec_is_format_change (GstOMXAudioDec * dec, GstOMXPort * port, GstCaps * caps); static gint gst_omx_mp3_dec_get_samples_per_frame (GstOMXAudioDec * dec, GstOMXPort * port); static gboolean gst_omx_mp3_dec_get_channel_positions (GstOMXAudioDec * dec, GstOMXPort * port, GstAudioChannelPosition position[OMX_AUDIO_MAXCHANNELS]); /* class initialization */ #define DEBUG_INIT \ GST_DEBUG_CATEGORY_INIT (gst_omx_mp3_dec_debug_category, "omxmp3dec", 0, \ "debug category for gst-omx mp3 audio decoder"); G_DEFINE_TYPE_WITH_CODE (GstOMXMP3Dec, gst_omx_mp3_dec, GST_TYPE_OMX_AUDIO_DEC, DEBUG_INIT); static void gst_omx_mp3_dec_class_init (GstOMXMP3DecClass * klass) { GstElementClass *element_class = GST_ELEMENT_CLASS (klass); GstOMXAudioDecClass *audiodec_class = GST_OMX_AUDIO_DEC_CLASS (klass); audiodec_class->set_format = GST_DEBUG_FUNCPTR (gst_omx_mp3_dec_set_format); audiodec_class->is_format_change = GST_DEBUG_FUNCPTR (gst_omx_mp3_dec_is_format_change); audiodec_class->get_samples_per_frame = GST_DEBUG_FUNCPTR (gst_omx_mp3_dec_get_samples_per_frame); audiodec_class->get_channel_positions = GST_DEBUG_FUNCPTR (gst_omx_mp3_dec_get_channel_positions); audiodec_class->cdata.default_sink_template_caps = "audio/mpeg, " "mpegversion=(int)1, " "layer=(int)3, " "mpegaudioversion=(int)[1,3], " "rate=(int)[8000,48000], " "channels=(int)[1,2], " "parsed=(boolean) true"; gst_element_class_set_static_metadata (element_class, "OpenMAX MP3 Audio Decoder", "Codec/Decoder/Audio/Hardware", "Decode MP3 audio streams", "Sebastian Dröge <sebastian@centricular.com>"); gst_omx_set_default_role (&audiodec_class->cdata, "audio_decoder.mp3"); } static void gst_omx_mp3_dec_init (GstOMXMP3Dec * self) { self->spf = -1; } static gboolean gst_omx_mp3_dec_set_format (GstOMXAudioDec * dec, GstOMXPort * port, GstCaps * caps) { GstOMXMP3Dec *self = GST_OMX_MP3_DEC (dec); OMX_PARAM_PORTDEFINITIONTYPE port_def; OMX_AUDIO_PARAM_MP3TYPE mp3_param; OMX_ERRORTYPE err; GstStructure *s; gint rate, channels, layer, mpegaudioversion; gst_omx_port_get_port_definition (port, &port_def); port_def.format.audio.eEncoding = OMX_AUDIO_CodingMP3; err = gst_omx_port_update_port_definition (port, &port_def); if (err != OMX_ErrorNone) { GST_ERROR_OBJECT (self, "Failed to set MP3 format on component: %s (0x%08x)", gst_omx_error_to_string (err), err); return FALSE; } GST_OMX_INIT_STRUCT (&mp3_param); mp3_param.nPortIndex = port->index; err = gst_omx_component_get_parameter (dec->dec, OMX_IndexParamAudioMp3, &mp3_param); if (err != OMX_ErrorNone) { GST_ERROR_OBJECT (self, "Failed to get MP3 parameters from component: %s (0x%08x)", gst_omx_error_to_string (err), err); return FALSE; } s = gst_caps_get_structure (caps, 0); if (!gst_structure_get_int (s, "mpegaudioversion", &mpegaudioversion) || !gst_structure_get_int (s, "layer", &layer) || !gst_structure_get_int (s, "rate", &rate) || !gst_structure_get_int (s, "channels", &channels)) { GST_ERROR_OBJECT (self, "Incomplete caps"); return FALSE; } self->spf = (mpegaudioversion == 1 ? 1152 : 576); mp3_param.nChannels = channels; mp3_param.nBitRate = 0; /* unknown */ mp3_param.nSampleRate = rate; mp3_param.nAudioBandWidth = 0; /* decoder decision */ mp3_param.eChannelMode = 0; /* FIXME */ if (mpegaudioversion == 1) mp3_param.eFormat = OMX_AUDIO_MP3StreamFormatMP1Layer3; else if (mpegaudioversion == 2) mp3_param.eFormat = OMX_AUDIO_MP3StreamFormatMP2Layer3; else mp3_param.eFormat = OMX_AUDIO_MP3StreamFormatMP2_5Layer3; err = gst_omx_component_set_parameter (dec->dec, OMX_IndexParamAudioMp3, &mp3_param); if (err != OMX_ErrorNone) { GST_ERROR_OBJECT (self, "Error setting MP3 parameters: %s (0x%08x)", gst_omx_error_to_string (err), err); return FALSE; } return TRUE; } static gboolean gst_omx_mp3_dec_is_format_change (GstOMXAudioDec * dec, GstOMXPort * port, GstCaps * caps) { GstOMXMP3Dec *self = GST_OMX_MP3_DEC (dec); OMX_AUDIO_PARAM_MP3TYPE mp3_param; OMX_ERRORTYPE err; GstStructure *s; gint rate, channels, layer, mpegaudioversion; GST_OMX_INIT_STRUCT (&mp3_param); mp3_param.nPortIndex = port->index; err = gst_omx_component_get_parameter (dec->dec, OMX_IndexParamAudioMp3, &mp3_param); if (err != OMX_ErrorNone) { GST_ERROR_OBJECT (self, "Failed to get MP3 parameters from component: %s (0x%08x)", gst_omx_error_to_string (err), err); return FALSE; } s = gst_caps_get_structure (caps, 0); if (!gst_structure_get_int (s, "mpegaudioversion", &mpegaudioversion) || !gst_structure_get_int (s, "layer", &layer) || !gst_structure_get_int (s, "rate", &rate) || !gst_structure_get_int (s, "channels", &channels)) { GST_ERROR_OBJECT (self, "Incomplete caps"); return FALSE; } if (mp3_param.nChannels != channels) return TRUE; if (mp3_param.nSampleRate != rate) return TRUE; if (mpegaudioversion == 1 && mp3_param.eFormat != OMX_AUDIO_MP3StreamFormatMP1Layer3) return TRUE; if (mpegaudioversion == 2 && mp3_param.eFormat != OMX_AUDIO_MP3StreamFormatMP2Layer3) return TRUE; if (mpegaudioversion == 3 && mp3_param.eFormat != OMX_AUDIO_MP3StreamFormatMP2_5Layer3) return TRUE; return FALSE; } static gint gst_omx_mp3_dec_get_samples_per_frame (GstOMXAudioDec * dec, GstOMXPort * port) { return GST_OMX_MP3_DEC (dec)->spf; } static gboolean gst_omx_mp3_dec_get_channel_positions (GstOMXAudioDec * dec, GstOMXPort * port, GstAudioChannelPosition position[OMX_AUDIO_MAXCHANNELS]) { OMX_AUDIO_PARAM_PCMMODETYPE pcm_param; OMX_ERRORTYPE err; GST_OMX_INIT_STRUCT (&pcm_param); pcm_param.nPortIndex = port->index; err = gst_omx_component_get_parameter (dec->dec, OMX_IndexParamAudioPcm, &pcm_param); if (err != OMX_ErrorNone) { GST_ERROR_OBJECT (dec, "Failed to get PCM parameters: %s (0x%08x)", gst_omx_error_to_string (err), err); return FALSE; } switch (pcm_param.nChannels) { case 1: position[0] = GST_AUDIO_CHANNEL_POSITION_MONO; break; case 2: position[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT; position[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT; break; default: return FALSE; } return TRUE; }