gstreamer/omx/gstomxmp3dec.c

246 lines
7.5 KiB
C

/*
* 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",
"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;
}