mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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bebb579a91
Original commit message from CVS: Move discont event back to where it was :)
919 lines
25 KiB
C
919 lines
25 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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 Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <gst/gst.h>
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#include <string.h>
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#include <mad.h>
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#define GST_TYPE_MAD \
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(gst_mad_get_type())
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#define GST_MAD(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MAD,GstMad))
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#define GST_MAD_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MAD,GstMad))
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#define GST_IS_MAD(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MAD))
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#define GST_IS_MAD_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MAD))
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typedef struct _GstMad GstMad;
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typedef struct _GstMadClass GstMadClass;
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struct _GstMad {
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GstElement element;
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/* pads */
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GstPad *sinkpad, *srcpad;
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/* state */
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struct mad_stream stream;
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struct mad_frame frame;
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struct mad_synth synth;
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guchar *tempbuffer;
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glong tempsize;
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gboolean need_sync;
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guint64 base_time;
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guint64 framestamp; /* timestamp-like, but counted in frames */
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guint64 total_samples; /* the number of samples since the sync point */
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gboolean restart;
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/* info */
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struct mad_header header;
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gboolean new_header;
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gboolean can_seek;
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gint channels;
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guint framecount;
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gint vbr_average; /* average bitrate */
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guint64 vbr_rate; /* average * framecount */
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/* caps */
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gboolean caps_set;
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};
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struct _GstMadClass {
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GstElementClass parent_class;
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};
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/* elementfactory information */
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static GstElementDetails gst_mad_details = {
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"mad mp3 decoder",
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"Codec/Audio/Decoder",
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"Uses mad code to decode mp3 streams",
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VERSION,
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"Wim Taymans <wim.taymans@chello.be>",
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"(C) 2001",
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};
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/* Mad signals and args */
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enum {
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/* FILL ME */
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LAST_SIGNAL
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};
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enum {
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ARG_0,
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ARG_LAYER,
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ARG_MODE,
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ARG_EMPHASIS,
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ARG_BITRATE,
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ARG_SAMPLERATE,
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ARG_CHANNELS,
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ARG_AVERAGE_BITRATE,
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/* FILL ME */
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};
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GST_PAD_TEMPLATE_FACTORY (mad_src_template_factory,
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"src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_CAPS_NEW (
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"mad_src",
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"audio/raw",
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"format", GST_PROPS_STRING ("int"),
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"law", GST_PROPS_INT (0),
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"endianness", GST_PROPS_INT (G_BYTE_ORDER),
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"signed", GST_PROPS_BOOLEAN (TRUE),
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"width", GST_PROPS_INT (16),
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"depth", GST_PROPS_INT (16),
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"rate", GST_PROPS_INT_RANGE (11025, 48000),
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"channels", GST_PROPS_INT_RANGE (1, 2)
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)
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)
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GST_PAD_TEMPLATE_FACTORY (mad_sink_template_factory,
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"sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_CAPS_NEW (
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"mad_sink",
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"audio/mp3",
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NULL
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)
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)
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static void gst_mad_class_init (GstMadClass *klass);
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static void gst_mad_init (GstMad *mad);
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static void gst_mad_dispose (GObject *object);
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static void gst_mad_set_property (GObject *object, guint prop_id,
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const GValue *value, GParamSpec *pspec);
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static void gst_mad_get_property (GObject *object, guint prop_id,
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GValue *value, GParamSpec *pspec);
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static gboolean gst_mad_src_event (GstPad *pad, GstEvent *event);
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static gboolean gst_mad_src_query (GstPad *pad, GstPadQueryType type,
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GstFormat *format, gint64 *value);
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static gboolean gst_mad_convert_sink (GstPad *pad, GstFormat src_format, gint64 src_value,
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GstFormat *dest_format, gint64 *dest_value);
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static gboolean gst_mad_convert_src (GstPad *pad, GstFormat src_format, gint64 src_value,
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GstFormat *dest_format, gint64 *dest_value);
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static void gst_mad_chain (GstPad *pad, GstBuffer *buffer);
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static GstElementStateReturn
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gst_mad_change_state (GstElement *element);
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static GstElementClass *parent_class = NULL;
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/* static guint gst_mad_signals[LAST_SIGNAL] = { 0 }; */
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GType
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gst_mad_get_type (void)
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{
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static GType mad_type = 0;
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if (!mad_type) {
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static const GTypeInfo mad_info = {
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sizeof(GstMadClass),
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NULL,
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NULL,
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(GClassInitFunc)gst_mad_class_init,
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NULL,
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NULL,
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sizeof(GstMad),
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0,
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(GInstanceInitFunc)gst_mad_init,
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};
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mad_type = g_type_register_static(GST_TYPE_ELEMENT, "GstMad", &mad_info, 0);
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}
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return mad_type;
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}
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static gchar *layers[] = { "unknown", "I", "II", "III" };
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static gchar *modes[] = { "single channel", "dual channel", "joint stereo", "stereo" };
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static gchar *emphases[] = { "none", "50/15 microseconds", "CCITT J.17" };
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static void
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gst_mad_class_init (GstMadClass *klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass*) klass;
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gstelement_class = (GstElementClass*) klass;
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parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
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gobject_class->set_property = gst_mad_set_property;
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gobject_class->get_property = gst_mad_get_property;
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gobject_class->dispose = gst_mad_dispose;
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gstelement_class->change_state = gst_mad_change_state;
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/* init properties */
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/* currently, string representations are used, we might want to change that */
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/* FIXME: descriptions need to be more technical, default values and ranges need to be selected right */
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g_object_class_install_property (gobject_class, ARG_LAYER,
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g_param_spec_string ("layer", "Layer", "The audio MPEG Layer this stream is encoded in",
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layers[0], G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, ARG_MODE,
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g_param_spec_string ("mode", "Mode", "The current mode of the channels",
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modes[0], G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, ARG_EMPHASIS,
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g_param_spec_string ("emphasis", "Emphasis", "Emphasis",
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emphases[0], G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, ARG_BITRATE,
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g_param_spec_int ("bitrate", "Bitrate", "current bitrate of the stream",
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0, G_MAXINT, 0, G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, ARG_AVERAGE_BITRATE,
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g_param_spec_int ("average-bitrate", "average bitrate", "average bitrate of the stream",
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0, G_MAXINT, 0, G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, ARG_SAMPLERATE,
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g_param_spec_int ("samplerate", "Samplerate", "current samplerate of the stream",
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0, G_MAXINT, 0, G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, ARG_CHANNELS,
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g_param_spec_int ("channels", "Channels", "number of channels",
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1, 2, 1, G_PARAM_READABLE));
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}
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static void
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gst_mad_init (GstMad *mad)
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{
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/* create the sink and src pads */
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mad->sinkpad = gst_pad_new_from_template(
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GST_PAD_TEMPLATE_GET (mad_sink_template_factory), "sink");
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gst_element_add_pad (GST_ELEMENT (mad), mad->sinkpad);
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gst_pad_set_chain_function (mad->sinkpad, GST_DEBUG_FUNCPTR (gst_mad_chain));
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gst_pad_set_convert_function (mad->sinkpad, GST_DEBUG_FUNCPTR (gst_mad_convert_sink));
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mad->srcpad = gst_pad_new_from_template(
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GST_PAD_TEMPLATE_GET (mad_src_template_factory), "src");
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gst_element_add_pad (GST_ELEMENT (mad), mad->srcpad);
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gst_pad_set_event_function (mad->srcpad, GST_DEBUG_FUNCPTR (gst_mad_src_event));
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gst_pad_set_query_function (mad->srcpad, GST_DEBUG_FUNCPTR (gst_mad_src_query));
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gst_pad_set_convert_function (mad->srcpad, GST_DEBUG_FUNCPTR (gst_mad_convert_src));
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mad->tempbuffer = g_malloc (MAD_BUFFER_MDLEN * 3);
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mad->tempsize = 0;
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mad->need_sync = TRUE;
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mad->base_time = 0;
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mad->framestamp = 0;
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mad->total_samples = 0;
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mad->new_header = TRUE;
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mad->framecount = 0;
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mad->vbr_average = 0;
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mad->vbr_rate = 0;
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mad->restart = FALSE;
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GST_FLAG_SET (mad, GST_ELEMENT_EVENT_AWARE);
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}
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static void
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gst_mad_dispose (GObject *object)
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{
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GstMad *mad = GST_MAD (object);
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G_OBJECT_CLASS (parent_class)->dispose (object);
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g_free (mad->tempbuffer);
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}
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static gboolean
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gst_mad_convert_sink (GstPad *pad, GstFormat src_format, gint64 src_value,
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GstFormat *dest_format, gint64 *dest_value)
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{
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gboolean res = TRUE;
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GstMad *mad;
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mad = GST_MAD (gst_pad_get_parent (pad));
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if (mad->vbr_average == 0)
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return FALSE;
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switch (src_format) {
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case GST_FORMAT_BYTES:
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switch (*dest_format) {
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case GST_FORMAT_DEFAULT:
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*dest_format = GST_FORMAT_TIME;
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case GST_FORMAT_TIME:
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/* multiply by 8 because vbr is in bits/second */
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*dest_value = src_value * 8 * GST_SECOND / mad->vbr_average;
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break;
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default:
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res = FALSE;
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}
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break;
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case GST_FORMAT_TIME:
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switch (*dest_format) {
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case GST_FORMAT_DEFAULT:
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*dest_format = GST_FORMAT_BYTES;
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case GST_FORMAT_BYTES:
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/* multiply by 8 because vbr is in bits/second */
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*dest_value = src_value * mad->vbr_average / (8 * GST_SECOND);
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break;
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default:
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res = FALSE;
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}
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break;
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default:
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res = FALSE;
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}
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return res;
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}
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static gboolean
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gst_mad_convert_src (GstPad *pad, GstFormat src_format, gint64 src_value,
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GstFormat *dest_format, gint64 *dest_value)
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{
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gboolean res = TRUE;
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guint scale = 1;
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gint bytes_per_sample;
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GstMad *mad;
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mad = GST_MAD (gst_pad_get_parent (pad));
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bytes_per_sample = MAD_NCHANNELS (&mad->frame.header) << 1;
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switch (src_format) {
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case GST_FORMAT_BYTES:
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switch (*dest_format) {
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case GST_FORMAT_UNITS:
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if (bytes_per_sample == 0)
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return FALSE;
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*dest_value = src_value / bytes_per_sample;
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break;
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case GST_FORMAT_DEFAULT:
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*dest_format = GST_FORMAT_TIME;
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case GST_FORMAT_TIME:
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{
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gint byterate = bytes_per_sample * mad->frame.header.samplerate;
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if (byterate == 0)
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return FALSE;
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*dest_value = src_value * GST_SECOND / byterate;
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break;
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}
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default:
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res = FALSE;
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}
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break;
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case GST_FORMAT_UNITS:
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switch (*dest_format) {
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case GST_FORMAT_BYTES:
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*dest_value = src_value * bytes_per_sample;
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break;
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case GST_FORMAT_DEFAULT:
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*dest_format = GST_FORMAT_TIME;
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case GST_FORMAT_TIME:
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if (mad->frame.header.samplerate == 0)
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return FALSE;
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*dest_value = src_value * GST_SECOND / mad->frame.header.samplerate;
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break;
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default:
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res = FALSE;
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}
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break;
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case GST_FORMAT_TIME:
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switch (*dest_format) {
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case GST_FORMAT_DEFAULT:
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*dest_format = GST_FORMAT_BYTES;
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case GST_FORMAT_BYTES:
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scale = bytes_per_sample;
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/* fallthrough */
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case GST_FORMAT_UNITS:
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*dest_value = src_value * scale * mad->frame.header.samplerate / GST_SECOND;
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break;
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default:
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res = FALSE;
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}
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break;
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default:
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res = FALSE;
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}
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return res;
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}
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static gboolean
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gst_mad_src_query (GstPad *pad, GstPadQueryType type,
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GstFormat *format, gint64 *value)
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{
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gboolean res = TRUE;
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GstMad *mad;
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static const GstFormat formats[] = { GST_FORMAT_TIME, GST_FORMAT_BYTES };
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gint i;
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mad = GST_MAD (gst_pad_get_parent (pad));
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switch (type) {
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case GST_PAD_QUERY_TOTAL:
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{
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switch (*format) {
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case GST_FORMAT_DEFAULT:
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*format = GST_FORMAT_TIME;
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/* fallthrough */
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case GST_FORMAT_BYTES:
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case GST_FORMAT_UNITS:
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case GST_FORMAT_TIME:
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{
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res = FALSE;
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for (i = 0; i < 2 && !res; i++) {
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GstFormat peer_format;
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gint64 peer_value;
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peer_format = formats[i];
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/* do the probe */
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if (gst_pad_query (GST_PAD_PEER (mad->sinkpad), GST_PAD_QUERY_TOTAL,
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&peer_format, &peer_value))
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{
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GstFormat conv_format;
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/* convert to TIME */
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conv_format = GST_FORMAT_TIME;
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res = gst_pad_convert (mad->sinkpad,
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peer_format, peer_value,
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&conv_format, value);
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/* and to final format */
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res &= gst_pad_convert (pad,
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GST_FORMAT_TIME, *value,
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format, value);
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}
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}
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break;
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}
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default:
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res = FALSE;
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break;
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}
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break;
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}
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case GST_PAD_QUERY_POSITION:
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switch (*format) {
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case GST_FORMAT_DEFAULT:
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*format = GST_FORMAT_TIME;
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/* fall through */
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default:
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{
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GstFormat time_format;
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gint64 samples;
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time_format = GST_FORMAT_UNITS;
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res = gst_pad_convert (pad,
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GST_FORMAT_TIME, mad->base_time,
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&time_format, &samples);
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/* we only know about our samples, convert to requested format */
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res &= gst_pad_convert (pad,
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GST_FORMAT_UNITS, mad->total_samples + samples,
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format, value);
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break;
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}
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}
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break;
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default:
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res = FALSE;
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break;
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}
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return res;
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}
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static gboolean
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gst_mad_src_event (GstPad *pad, GstEvent *event)
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{
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gboolean res = TRUE;
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GstMad *mad;
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static const GstFormat formats[] = { GST_FORMAT_TIME, GST_FORMAT_BYTES };
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gint i;
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mad = GST_MAD (gst_pad_get_parent (pad));
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switch (GST_EVENT_TYPE (event)) {
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/* the all-formats seek logic */
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case GST_EVENT_SEEK:
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{
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gint64 src_offset;
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gboolean flush;
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GstFormat format;
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format = GST_FORMAT_TIME;
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/* first bring the src_format to TIME */
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if (!gst_pad_convert (pad,
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GST_EVENT_SEEK_FORMAT (event), GST_EVENT_SEEK_OFFSET (event),
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&format, &src_offset))
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{
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/* didn't work, probably unsupported seek format then */
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res = FALSE;
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break;
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}
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/* shave off the flush flag, we'll need it later */
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flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
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/* assume the worst */
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res = FALSE;
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/* while we did not exhaust our seek formats without result */
|
|
for (i = 0; i < 2 && !res; i++) {
|
|
gint64 desired_offset;
|
|
|
|
format = formats[i];
|
|
|
|
/* try to convert requested format to one we can seek with on the sinkpad */
|
|
if (gst_pad_convert (mad->sinkpad, GST_FORMAT_TIME, src_offset, &format, &desired_offset))
|
|
{
|
|
GstEvent *seek_event;
|
|
|
|
/* conversion succeeded, create the seek */
|
|
seek_event = gst_event_new_seek (formats[i] | GST_SEEK_METHOD_SET | flush, desired_offset);
|
|
/* do the seek */
|
|
if (gst_pad_send_event (GST_PAD_PEER (mad->sinkpad), seek_event)) {
|
|
/* seek worked, we're done, loop will exit */
|
|
res = TRUE;
|
|
}
|
|
gst_event_free (seek_event);
|
|
}
|
|
/* at this point, either the seek worked or res == FALSE */
|
|
if (res)
|
|
/* we need to break out of the processing loop on flush */
|
|
mad->restart = flush;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
res = FALSE;
|
|
break;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static inline signed int
|
|
scale (mad_fixed_t sample)
|
|
{
|
|
/* round */
|
|
sample += (1L << (MAD_F_FRACBITS - 16));
|
|
|
|
/* clip */
|
|
if (sample >= MAD_F_ONE)
|
|
sample = MAD_F_ONE - 1;
|
|
else if (sample < -MAD_F_ONE)
|
|
sample = -MAD_F_ONE;
|
|
|
|
/* quantize */
|
|
return sample >> (MAD_F_FRACBITS + 1 - 16);
|
|
}
|
|
|
|
/* do we need this function? */
|
|
static void
|
|
gst_mad_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
|
|
{
|
|
GstMad *mad;
|
|
|
|
/* it's not null if we got it, but it might not be ours */
|
|
g_return_if_fail (GST_IS_MAD (object));
|
|
|
|
mad = GST_MAD (object);
|
|
|
|
switch (prop_id) {
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
static void
|
|
gst_mad_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
|
|
{
|
|
GstMad *mad;
|
|
|
|
/* it's not null if we got it, but it might not be ours */
|
|
g_return_if_fail (GST_IS_MAD (object));
|
|
|
|
mad = GST_MAD (object);
|
|
|
|
switch (prop_id) {
|
|
case ARG_LAYER:
|
|
g_value_set_string (value, layers[mad->header.layer]);
|
|
break;
|
|
case ARG_MODE:
|
|
g_value_set_string (value, modes[mad->header.mode]);
|
|
break;
|
|
case ARG_EMPHASIS:
|
|
g_value_set_string (value, emphases[mad->header.emphasis]);
|
|
break;
|
|
case ARG_BITRATE:
|
|
g_value_set_int (value, mad->header.bitrate);
|
|
break;
|
|
case ARG_AVERAGE_BITRATE:
|
|
g_value_set_int (value, mad->vbr_average);
|
|
break;
|
|
case ARG_SAMPLERATE:
|
|
g_value_set_int (value, mad->header.samplerate);
|
|
break;
|
|
case ARG_CHANNELS:
|
|
g_value_set_int (value, mad->channels);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_mad_update_info (GstMad *mad)
|
|
{
|
|
gint abr = mad->vbr_average;
|
|
struct mad_header *header = &mad->frame.header;
|
|
|
|
#define CHECK_HEADER(h1,str) \
|
|
G_STMT_START{ \
|
|
if (mad->header.h1 != header->h1 || mad->new_header) { \
|
|
mad->header.h1 = header->h1; \
|
|
g_object_notify (G_OBJECT (mad), str); \
|
|
}; \
|
|
} G_STMT_END
|
|
|
|
g_object_freeze_notify (G_OBJECT (mad));
|
|
|
|
/* update average bitrate */
|
|
if (mad->new_header) {
|
|
mad->framecount = 1;
|
|
mad->vbr_rate = header->bitrate;
|
|
abr = 0;
|
|
} else {
|
|
mad->framecount++;
|
|
mad->vbr_rate += header->bitrate;
|
|
}
|
|
mad->vbr_average = (gint) (mad->vbr_rate / mad->framecount);
|
|
if (abr != mad->vbr_average) {
|
|
g_object_notify (G_OBJECT (mad), "average_bitrate");
|
|
}
|
|
|
|
CHECK_HEADER (layer, "layer");
|
|
CHECK_HEADER (mode, "mode");
|
|
CHECK_HEADER (emphasis, "emphasis");
|
|
CHECK_HEADER (bitrate, "bitrate");
|
|
CHECK_HEADER (samplerate, "samplerate");
|
|
if (mad->channels != MAD_NCHANNELS (header) || mad->new_header) {
|
|
mad->channels = MAD_NCHANNELS (header);
|
|
g_object_notify (G_OBJECT (mad), "channels");
|
|
}
|
|
mad->new_header = FALSE;
|
|
|
|
g_object_thaw_notify (G_OBJECT (mad));
|
|
|
|
#undef CHECK_HEADER
|
|
}
|
|
|
|
static void
|
|
gst_mad_chain (GstPad *pad, GstBuffer *buffer)
|
|
{
|
|
GstMad *mad;
|
|
gchar *data;
|
|
glong size;
|
|
|
|
mad = GST_MAD (gst_pad_get_parent (pad));
|
|
|
|
if (GST_IS_EVENT (buffer)) {
|
|
GstEvent *event = GST_EVENT (buffer);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_DISCONTINUOUS:
|
|
{
|
|
gint n = GST_EVENT_DISCONT_OFFSET_LEN (event);
|
|
gint i;
|
|
|
|
for (i=0; i<n; i++) {
|
|
if (GST_EVENT_DISCONT_OFFSET(event,i).format == GST_FORMAT_BYTES ||
|
|
GST_EVENT_DISCONT_OFFSET(event,i).format == GST_FORMAT_TIME)
|
|
{
|
|
gint64 value = GST_EVENT_DISCONT_OFFSET (event, i).value;
|
|
gint64 time;
|
|
GstFormat format;
|
|
GstEvent *discont;
|
|
|
|
/* see how long the input bytes take */
|
|
format = GST_FORMAT_TIME;
|
|
if (!gst_pad_convert (pad,
|
|
GST_EVENT_DISCONT_OFFSET (event, i).format, value,
|
|
&format, &time))
|
|
{
|
|
time = 0;
|
|
}
|
|
|
|
mad->base_time = time;
|
|
|
|
gst_event_free (event);
|
|
discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, time, NULL);
|
|
gst_pad_push (mad->srcpad, GST_BUFFER (discont));
|
|
break;
|
|
}
|
|
}
|
|
mad->total_samples = 0;
|
|
mad->tempsize = 0;
|
|
/* we don't need to restart when we get here */
|
|
mad->restart = FALSE;
|
|
break;
|
|
}
|
|
default:
|
|
gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (GST_BUFFER_TIMESTAMP (buffer) != -1) {
|
|
mad->base_time = GST_BUFFER_TIMESTAMP (buffer);
|
|
mad->total_samples = 0;
|
|
}
|
|
|
|
/* end of new bit */
|
|
data = GST_BUFFER_DATA (buffer);
|
|
size = GST_BUFFER_SIZE (buffer);
|
|
|
|
while (size > 0) {
|
|
gint tocopy;
|
|
guchar *mad_input_buffer;
|
|
|
|
/* cut the buffer in MDLEN pieces */
|
|
tocopy = MIN (MAD_BUFFER_MDLEN, size);
|
|
|
|
memcpy (mad->tempbuffer + mad->tempsize, data, tocopy);
|
|
mad->tempsize += tocopy;
|
|
|
|
size -= tocopy;
|
|
data += tocopy;
|
|
|
|
mad_input_buffer = mad->tempbuffer;
|
|
|
|
/* if we have data we can try to proceed */
|
|
while (mad->tempsize >= 0) {
|
|
gint consumed;
|
|
guint nchannels, nsamples;
|
|
mad_fixed_t const *left_ch, *right_ch;
|
|
GstBuffer *outbuffer;
|
|
gint16 *outdata;
|
|
|
|
mad_stream_buffer (&mad->stream, mad_input_buffer, mad->tempsize);
|
|
|
|
if (mad_frame_decode (&mad->frame, &mad->stream) == -1) {
|
|
/* not enough data, need to wait for next buffer? */
|
|
if (mad->stream.error == MAD_ERROR_BUFLEN) {
|
|
break;
|
|
}
|
|
if (!MAD_RECOVERABLE (mad->stream.error)) {
|
|
gst_element_error (GST_ELEMENT (mad), "fatal error decoding stream");
|
|
return;
|
|
}
|
|
mad_frame_mute (&mad->frame);
|
|
mad_synth_mute (&mad->synth);
|
|
mad_stream_sync (&mad->stream);
|
|
/* recoverable errors pass */
|
|
goto next;
|
|
}
|
|
|
|
mad_synth_frame (&mad->synth, &mad->frame);
|
|
|
|
nchannels = MAD_NCHANNELS (&mad->frame.header);
|
|
nsamples = mad->synth.pcm.length;
|
|
left_ch = mad->synth.pcm.samples[0];
|
|
right_ch = mad->synth.pcm.samples[1];
|
|
|
|
/* at this point we can accept seek events */
|
|
mad->can_seek = TRUE;
|
|
|
|
gst_mad_update_info (mad);
|
|
|
|
outbuffer = gst_buffer_new ();
|
|
outdata = (gint16 *) GST_BUFFER_DATA (outbuffer) = g_malloc (nsamples * nchannels * 2);
|
|
GST_BUFFER_SIZE (outbuffer) = nsamples * nchannels * 2;
|
|
|
|
|
|
if (mad->frame.header.samplerate == 0) {
|
|
g_warning ("mad->frame.header.samplerate is 0 !");
|
|
}
|
|
else {
|
|
GST_BUFFER_TIMESTAMP (outbuffer) = mad->base_time +
|
|
mad->total_samples * GST_SECOND / mad->frame.header.samplerate;
|
|
}
|
|
|
|
mad->total_samples += nsamples;
|
|
|
|
/* end of new bit */
|
|
while (nsamples--) {
|
|
/* output sample(s) in 16-bit signed native-endian PCM */
|
|
*outdata++ = scale(*left_ch++) & 0xffff;
|
|
|
|
if (nchannels == 2) {
|
|
*outdata++ = scale(*right_ch++) & 0xffff;
|
|
}
|
|
}
|
|
if (mad->caps_set == FALSE) {
|
|
if (!gst_pad_try_set_caps (mad->srcpad,
|
|
gst_caps_new (
|
|
"mad_src",
|
|
"audio/raw",
|
|
gst_props_new (
|
|
"format", GST_PROPS_STRING ("int"),
|
|
"law", GST_PROPS_INT (0),
|
|
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
|
|
"signed", GST_PROPS_BOOLEAN (TRUE),
|
|
"width", GST_PROPS_INT (16),
|
|
"depth", GST_PROPS_INT (16),
|
|
#if MAD_VERSION_MINOR <= 12
|
|
"rate", GST_PROPS_INT (mad->header.sfreq),
|
|
#else
|
|
"rate", GST_PROPS_INT (mad->header.samplerate),
|
|
#endif
|
|
"channels", GST_PROPS_INT (nchannels),
|
|
NULL)))) {
|
|
gst_element_error (GST_ELEMENT (mad), "could not set caps on source pad, aborting...");
|
|
}
|
|
mad->caps_set = TRUE;
|
|
}
|
|
|
|
if (GST_PAD_IS_CONNECTED (mad->srcpad)) {
|
|
gst_pad_push (mad->srcpad, outbuffer);
|
|
}
|
|
else {
|
|
gst_buffer_unref (outbuffer);
|
|
}
|
|
|
|
if (mad->restart) {
|
|
mad->restart = FALSE;
|
|
mad->tempsize = 0;
|
|
goto end;
|
|
}
|
|
|
|
next:
|
|
|
|
/* figure out how many bytes mad consumed */
|
|
consumed = mad->stream.next_frame - mad_input_buffer;
|
|
|
|
/* move out pointer to where mad want the next data */
|
|
mad_input_buffer += consumed;
|
|
mad->tempsize -= consumed;
|
|
}
|
|
memmove (mad->tempbuffer, mad_input_buffer, mad->tempsize);
|
|
}
|
|
|
|
end:
|
|
gst_buffer_unref (buffer);
|
|
}
|
|
|
|
static GstElementStateReturn
|
|
gst_mad_change_state (GstElement *element)
|
|
{
|
|
GstMad *mad;
|
|
|
|
mad = GST_MAD (element);
|
|
|
|
switch (GST_STATE_TRANSITION (element)) {
|
|
case GST_STATE_NULL_TO_READY:
|
|
break;
|
|
case GST_STATE_READY_TO_PAUSED:
|
|
mad_stream_init (&mad->stream);
|
|
mad_frame_init (&mad->frame);
|
|
mad_synth_init (&mad->synth);
|
|
mad->tempsize = 0;
|
|
mad->can_seek = FALSE;
|
|
mad->total_samples = 0;
|
|
break;
|
|
case GST_STATE_PAUSED_TO_PLAYING:
|
|
/* do something to get out of the chain function faster */
|
|
break;
|
|
case GST_STATE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_PAUSED_TO_READY:
|
|
mad_synth_finish (&mad->synth);
|
|
mad_frame_finish (&mad->frame);
|
|
mad_stream_finish (&mad->stream);
|
|
mad->vbr_average = 0;
|
|
mad->frame.header.samplerate = 0;
|
|
mad->can_seek = FALSE;
|
|
mad->restart = TRUE;
|
|
break;
|
|
case GST_STATE_READY_TO_NULL:
|
|
break;
|
|
}
|
|
|
|
parent_class->change_state (element);
|
|
|
|
return GST_STATE_SUCCESS;
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GModule *module, GstPlugin *plugin)
|
|
{
|
|
GstElementFactory *factory;
|
|
|
|
/* create an elementfactory for the mad element */
|
|
factory = gst_element_factory_new ("mad", GST_TYPE_MAD, &gst_mad_details);
|
|
g_return_val_if_fail (factory != NULL, FALSE);
|
|
|
|
gst_element_factory_add_pad_template (factory,
|
|
GST_PAD_TEMPLATE_GET (mad_sink_template_factory));
|
|
gst_element_factory_add_pad_template (factory,
|
|
GST_PAD_TEMPLATE_GET (mad_src_template_factory));
|
|
gst_element_factory_set_rank (factory, GST_ELEMENT_RANK_PRIMARY);
|
|
|
|
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
GstPluginDesc plugin_desc = {
|
|
GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
"mad",
|
|
plugin_init
|
|
};
|