247 lines
7.5 KiB
C
247 lines
7.5 KiB
C
/*
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* Copyright (C) 2014, Sebastian Dröge <sebastian@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation
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* version 2.1 of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include "gstomxmp3dec.h"
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GST_DEBUG_CATEGORY_STATIC (gst_omx_mp3_dec_debug_category);
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#define GST_CAT_DEFAULT gst_omx_mp3_dec_debug_category
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/* prototypes */
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static gboolean gst_omx_mp3_dec_set_format (GstOMXAudioDec * dec,
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GstOMXPort * port, GstCaps * caps);
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static gboolean gst_omx_mp3_dec_is_format_change (GstOMXAudioDec * dec,
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GstOMXPort * port, GstCaps * caps);
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static gint gst_omx_mp3_dec_get_samples_per_frame (GstOMXAudioDec * dec,
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GstOMXPort * port);
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static gboolean gst_omx_mp3_dec_get_channel_positions (GstOMXAudioDec * dec,
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GstOMXPort * port, GstAudioChannelPosition position[OMX_AUDIO_MAXCHANNELS]);
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/* class initialization */
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#define DEBUG_INIT \
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GST_DEBUG_CATEGORY_INIT (gst_omx_mp3_dec_debug_category, "omxmp3dec", 0, \
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"debug category for gst-omx mp3 audio decoder");
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G_DEFINE_TYPE_WITH_CODE (GstOMXMP3Dec, gst_omx_mp3_dec,
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GST_TYPE_OMX_AUDIO_DEC, DEBUG_INIT);
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static void
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gst_omx_mp3_dec_class_init (GstOMXMP3DecClass * klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GstOMXAudioDecClass *audiodec_class = GST_OMX_AUDIO_DEC_CLASS (klass);
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audiodec_class->set_format = GST_DEBUG_FUNCPTR (gst_omx_mp3_dec_set_format);
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audiodec_class->is_format_change =
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GST_DEBUG_FUNCPTR (gst_omx_mp3_dec_is_format_change);
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audiodec_class->get_samples_per_frame =
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GST_DEBUG_FUNCPTR (gst_omx_mp3_dec_get_samples_per_frame);
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audiodec_class->get_channel_positions =
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GST_DEBUG_FUNCPTR (gst_omx_mp3_dec_get_channel_positions);
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audiodec_class->cdata.default_sink_template_caps = "audio/mpeg, "
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"mpegversion=(int)1, "
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"layer=(int)3, "
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"mpegaudioversion=(int)[1,3], "
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"rate=(int)[8000,48000], "
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"channels=(int)[1,2], " "parsed=(boolean) true";
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gst_element_class_set_static_metadata (element_class,
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"OpenMAX MP3 Audio Decoder",
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"Codec/Decoder/Audio/Hardware",
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"Decode MP3 audio streams",
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"Sebastian Dröge <sebastian@centricular.com>");
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gst_omx_set_default_role (&audiodec_class->cdata, "audio_decoder.mp3");
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}
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static void
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gst_omx_mp3_dec_init (GstOMXMP3Dec * self)
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{
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self->spf = -1;
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}
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static gboolean
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gst_omx_mp3_dec_set_format (GstOMXAudioDec * dec, GstOMXPort * port,
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GstCaps * caps)
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{
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GstOMXMP3Dec *self = GST_OMX_MP3_DEC (dec);
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OMX_PARAM_PORTDEFINITIONTYPE port_def;
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OMX_AUDIO_PARAM_MP3TYPE mp3_param;
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OMX_ERRORTYPE err;
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GstStructure *s;
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gint rate, channels, layer, mpegaudioversion;
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gst_omx_port_get_port_definition (port, &port_def);
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port_def.format.audio.eEncoding = OMX_AUDIO_CodingMP3;
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err = gst_omx_port_update_port_definition (port, &port_def);
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if (err != OMX_ErrorNone) {
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GST_ERROR_OBJECT (self,
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"Failed to set MP3 format on component: %s (0x%08x)",
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gst_omx_error_to_string (err), err);
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return FALSE;
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}
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GST_OMX_INIT_STRUCT (&mp3_param);
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mp3_param.nPortIndex = port->index;
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err =
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gst_omx_component_get_parameter (dec->dec, OMX_IndexParamAudioMp3,
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&mp3_param);
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if (err != OMX_ErrorNone) {
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GST_ERROR_OBJECT (self,
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"Failed to get MP3 parameters from component: %s (0x%08x)",
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gst_omx_error_to_string (err), err);
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return FALSE;
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}
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s = gst_caps_get_structure (caps, 0);
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if (!gst_structure_get_int (s, "mpegaudioversion", &mpegaudioversion) ||
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!gst_structure_get_int (s, "layer", &layer) ||
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!gst_structure_get_int (s, "rate", &rate) ||
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!gst_structure_get_int (s, "channels", &channels)) {
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GST_ERROR_OBJECT (self, "Incomplete caps");
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return FALSE;
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}
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self->spf = (mpegaudioversion == 1 ? 1152 : 576);
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mp3_param.nChannels = channels;
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mp3_param.nBitRate = 0; /* unknown */
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mp3_param.nSampleRate = rate;
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mp3_param.nAudioBandWidth = 0; /* decoder decision */
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mp3_param.eChannelMode = 0; /* FIXME */
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if (mpegaudioversion == 1)
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mp3_param.eFormat = OMX_AUDIO_MP3StreamFormatMP1Layer3;
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else if (mpegaudioversion == 2)
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mp3_param.eFormat = OMX_AUDIO_MP3StreamFormatMP2Layer3;
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else
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mp3_param.eFormat = OMX_AUDIO_MP3StreamFormatMP2_5Layer3;
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err =
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gst_omx_component_set_parameter (dec->dec, OMX_IndexParamAudioMp3,
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&mp3_param);
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if (err != OMX_ErrorNone) {
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GST_ERROR_OBJECT (self, "Error setting MP3 parameters: %s (0x%08x)",
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gst_omx_error_to_string (err), err);
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return FALSE;
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}
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return TRUE;
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}
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static gboolean
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gst_omx_mp3_dec_is_format_change (GstOMXAudioDec * dec, GstOMXPort * port,
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GstCaps * caps)
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{
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GstOMXMP3Dec *self = GST_OMX_MP3_DEC (dec);
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OMX_AUDIO_PARAM_MP3TYPE mp3_param;
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OMX_ERRORTYPE err;
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GstStructure *s;
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gint rate, channels, layer, mpegaudioversion;
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GST_OMX_INIT_STRUCT (&mp3_param);
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mp3_param.nPortIndex = port->index;
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err =
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gst_omx_component_get_parameter (dec->dec, OMX_IndexParamAudioMp3,
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&mp3_param);
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if (err != OMX_ErrorNone) {
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GST_ERROR_OBJECT (self,
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"Failed to get MP3 parameters from component: %s (0x%08x)",
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gst_omx_error_to_string (err), err);
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return FALSE;
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}
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s = gst_caps_get_structure (caps, 0);
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if (!gst_structure_get_int (s, "mpegaudioversion", &mpegaudioversion) ||
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!gst_structure_get_int (s, "layer", &layer) ||
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!gst_structure_get_int (s, "rate", &rate) ||
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!gst_structure_get_int (s, "channels", &channels)) {
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GST_ERROR_OBJECT (self, "Incomplete caps");
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return FALSE;
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}
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if (mp3_param.nChannels != channels)
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return TRUE;
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if (mp3_param.nSampleRate != rate)
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return TRUE;
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if (mpegaudioversion == 1
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&& mp3_param.eFormat != OMX_AUDIO_MP3StreamFormatMP1Layer3)
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return TRUE;
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if (mpegaudioversion == 2
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&& mp3_param.eFormat != OMX_AUDIO_MP3StreamFormatMP2Layer3)
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return TRUE;
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if (mpegaudioversion == 3
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&& mp3_param.eFormat != OMX_AUDIO_MP3StreamFormatMP2_5Layer3)
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return TRUE;
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return FALSE;
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}
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static gint
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gst_omx_mp3_dec_get_samples_per_frame (GstOMXAudioDec * dec, GstOMXPort * port)
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{
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return GST_OMX_MP3_DEC (dec)->spf;
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}
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static gboolean
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gst_omx_mp3_dec_get_channel_positions (GstOMXAudioDec * dec,
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GstOMXPort * port, GstAudioChannelPosition position[OMX_AUDIO_MAXCHANNELS])
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{
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OMX_AUDIO_PARAM_PCMMODETYPE pcm_param;
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OMX_ERRORTYPE err;
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GST_OMX_INIT_STRUCT (&pcm_param);
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pcm_param.nPortIndex = port->index;
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err =
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gst_omx_component_get_parameter (dec->dec, OMX_IndexParamAudioPcm,
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&pcm_param);
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if (err != OMX_ErrorNone) {
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GST_ERROR_OBJECT (dec, "Failed to get PCM parameters: %s (0x%08x)",
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gst_omx_error_to_string (err), err);
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return FALSE;
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}
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switch (pcm_param.nChannels) {
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case 1:
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position[0] = GST_AUDIO_CHANNEL_POSITION_MONO;
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break;
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case 2:
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position[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
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position[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
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break;
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default:
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return FALSE;
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}
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return TRUE;
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}
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