diff options
Diffstat (limited to 'omx/gstomxmp3dec.c')
| -rw-r--r-- | omx/gstomxmp3dec.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/omx/gstomxmp3dec.c b/omx/gstomxmp3dec.c new file mode 100644 index 0000000..f52a8f5 --- /dev/null +++ b/omx/gstomxmp3dec.c @@ -0,0 +1,209 @@ +/* + * 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); + +/* class initialization */ + +#define DEBUG_INIT \ + GST_DEBUG_CATEGORY_INIT (gst_omx_mp3_dec_debug_category, "omxmp3dec", 0, \ + "debug category for gst-omx audio decoder base class"); + +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->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", + "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; +} |