/* GStreamer * Copyright (C) <1999> Erik Walthinsen * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include #include #include #include "id3tag.h" #define GST_TYPE_MAD \ (gst_mad_get_type()) #define GST_MAD(obj) \ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MAD,GstMad)) #define GST_MAD_CLASS(klass) \ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MAD,GstMad)) #define GST_IS_MAD(obj) \ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MAD)) #define GST_IS_MAD_CLASS(obj) \ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MAD)) typedef struct _GstMad GstMad; typedef struct _GstMadClass GstMadClass; struct _GstMad { GstElement element; /* pads */ GstPad *sinkpad, *srcpad; /* state */ struct mad_stream stream; struct mad_frame frame; struct mad_synth synth; guchar *tempbuffer; glong tempsize; /* used to keep track of partial buffers */ gboolean need_sync; guint64 base_byte_offset; guint64 bytes_consumed; /* since the base_byte_offset */ guint64 base_time; guint64 framestamp; /* timestamp-like, but counted in frames */ guint64 total_samples; /* the number of samples since the sync point */ gboolean restart; guint64 segment_start; /* info */ struct mad_header header; gboolean new_header; gboolean can_seek; guint framecount; gint vbr_average; /* average bitrate */ guint64 vbr_rate; /* average * framecount */ gboolean half; gboolean ignore_crc; GstCaps *metadata; GstCaps *streaminfo; /* negotiated format */ gint rate; gint channels; GstIndex *index; gint index_id; }; struct _GstMadClass { GstElementClass parent_class; }; /* elementfactory information */ static GstElementDetails gst_mad_details = { "mad mp3 decoder", "Codec/Audio/Decoder", "GPL", "Uses mad code to decode mp3 streams", VERSION, "Wim Taymans ", "(C) 2001", }; /* Mad signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, ARG_HALF, ARG_IGNORE_CRC, ARG_METADATA, ARG_STREAMINFO /* FILL ME */ }; GST_PAD_TEMPLATE_FACTORY (mad_src_template_factory, "src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_CAPS_NEW ( "mad_src", "audio/raw", "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), "rate", GST_PROPS_INT_RANGE (11025, 48000), "channels", GST_PROPS_INT_RANGE (1, 2) ) ) GST_PAD_TEMPLATE_FACTORY (mad_sink_template_factory, "sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_CAPS_NEW ( "mad_sink", "audio/x-mp3", NULL ) ) static void gst_mad_class_init (GstMadClass *klass); static void gst_mad_init (GstMad *mad); static void gst_mad_dispose (GObject *object); static void gst_mad_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gst_mad_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static gboolean gst_mad_src_event (GstPad *pad, GstEvent *event); static const GstFormat* gst_mad_get_formats (GstPad *pad); static const GstEventMask* gst_mad_get_event_masks (GstPad *pad); static const GstQueryType* gst_mad_get_query_types (GstPad *pad); static gboolean gst_mad_src_query (GstPad *pad, GstQueryType type, GstFormat *format, gint64 *value); static gboolean gst_mad_convert_sink (GstPad *pad, GstFormat src_format, gint64 src_value, GstFormat *dest_format, gint64 *dest_value); static gboolean gst_mad_convert_src (GstPad *pad, GstFormat src_format, gint64 src_value, GstFormat *dest_format, gint64 *dest_value); static void gst_mad_chain (GstPad *pad, GstBuffer *buffer); static GstElementStateReturn gst_mad_change_state (GstElement *element); static void gst_mad_set_index (GstElement *element, GstIndex *index); static GstIndex* gst_mad_get_index (GstElement *element); static GstElementClass *parent_class = NULL; /* static guint gst_mad_signals[LAST_SIGNAL] = { 0 }; */ GType gst_mad_get_type (void) { static GType mad_type = 0; if (!mad_type) { static const GTypeInfo mad_info = { sizeof (GstMadClass), NULL, NULL, (GClassInitFunc) gst_mad_class_init, NULL, NULL, sizeof (GstMad), 0, (GInstanceInitFunc) gst_mad_init, }; mad_type = g_type_register_static(GST_TYPE_ELEMENT, "GstMad", &mad_info, 0); } return mad_type; } #define GST_TYPE_MAD_LAYER (gst_mad_layer_get_type()) G_GNUC_UNUSED static GType gst_mad_layer_get_type(void) { static GType mad_layer_type = 0; static GEnumValue mad_layer[] = { {0, "0", "Unknown"}, {MAD_LAYER_I, "1", "I"}, {MAD_LAYER_II, "2", "II"}, {MAD_LAYER_III, "3", "III"}, {0, NULL, NULL}, }; if (!mad_layer_type) { mad_layer_type = g_enum_register_static("GstMadLayer", mad_layer); } return mad_layer_type; } #define GST_TYPE_MAD_MODE (gst_mad_mode_get_type()) G_GNUC_UNUSED static GType gst_mad_mode_get_type(void) { static GType mad_mode_type = 0; static GEnumValue mad_mode[] = { {-1, "-1", "Unknown"}, {MAD_MODE_SINGLE_CHANNEL, "0", "Single Channel"}, {MAD_MODE_DUAL_CHANNEL , "1", "Dual Channel"}, {MAD_MODE_JOINT_STEREO , "2", "Joint Stereo"}, {MAD_MODE_STEREO , "3", "Stereo"}, { 0, NULL, NULL}, }; if (!mad_mode_type) { mad_mode_type = g_enum_register_static("GstMadMode", mad_mode); } return mad_mode_type; } #define GST_TYPE_MAD_EMPHASIS (gst_mad_emphasis_get_type()) G_GNUC_UNUSED static GType gst_mad_emphasis_get_type(void) { static GType mad_emphasis_type = 0; static GEnumValue mad_emphasis[] = { {-1, "-1", "Unknown"}, {MAD_EMPHASIS_NONE, "0", "None"}, {MAD_EMPHASIS_50_15_US, "1", "50/15 Microseconds"}, {MAD_EMPHASIS_CCITT_J_17, "2", "CCITT J.17"}, { 0, NULL, NULL}, }; if (!mad_emphasis_type) { mad_emphasis_type = g_enum_register_static("GstMadEmphasis", mad_emphasis); } return mad_emphasis_type; } static void gst_mad_class_init (GstMadClass *klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass*) klass; gstelement_class = (GstElementClass*) klass; parent_class = g_type_class_ref(GST_TYPE_ELEMENT); gobject_class->set_property = gst_mad_set_property; gobject_class->get_property = gst_mad_get_property; gobject_class->dispose = gst_mad_dispose; gstelement_class->change_state = gst_mad_change_state; gstelement_class->set_index = gst_mad_set_index; gstelement_class->get_index = gst_mad_get_index; /* init properties */ /* currently, string representations are used, we might want to change that */ /* FIXME: descriptions need to be more technical, * default values and ranges need to be selected right */ g_object_class_install_property (gobject_class, ARG_HALF, g_param_spec_boolean ("half", "Half", "Generate PCM at 1/2 sample rate", FALSE, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, ARG_IGNORE_CRC, g_param_spec_boolean ("ignore_crc", "Ignore CRC", "Ignore CRC errors", FALSE, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, ARG_METADATA, g_param_spec_boxed ("metadata", "Metadata", "Metadata", GST_TYPE_CAPS, G_PARAM_READABLE)); g_object_class_install_property (gobject_class, ARG_STREAMINFO, g_param_spec_boxed ("streaminfo", "Streaminfo", "Streaminfo", GST_TYPE_CAPS, G_PARAM_READABLE)); } static void gst_mad_init (GstMad *mad) { /* create the sink and src pads */ mad->sinkpad = gst_pad_new_from_template( GST_PAD_TEMPLATE_GET (mad_sink_template_factory), "sink"); gst_element_add_pad (GST_ELEMENT (mad), mad->sinkpad); gst_pad_set_chain_function (mad->sinkpad, GST_DEBUG_FUNCPTR (gst_mad_chain)); gst_pad_set_convert_function (mad->sinkpad, GST_DEBUG_FUNCPTR (gst_mad_convert_sink)); gst_pad_set_formats_function (mad->sinkpad, GST_DEBUG_FUNCPTR (gst_mad_get_formats)); mad->srcpad = gst_pad_new_from_template( GST_PAD_TEMPLATE_GET (mad_src_template_factory), "src"); gst_element_add_pad (GST_ELEMENT (mad), mad->srcpad); gst_pad_set_event_function (mad->srcpad, GST_DEBUG_FUNCPTR (gst_mad_src_event)); gst_pad_set_event_mask_function (mad->srcpad, GST_DEBUG_FUNCPTR (gst_mad_get_event_masks)); gst_pad_set_query_function (mad->srcpad, GST_DEBUG_FUNCPTR (gst_mad_src_query)); gst_pad_set_query_type_function (mad->srcpad, GST_DEBUG_FUNCPTR (gst_mad_get_query_types)); gst_pad_set_convert_function (mad->srcpad, GST_DEBUG_FUNCPTR (gst_mad_convert_src)); gst_pad_set_formats_function (mad->srcpad, GST_DEBUG_FUNCPTR (gst_mad_get_formats)); mad->tempbuffer = g_malloc (MAD_BUFFER_MDLEN * 3); mad->tempsize = 0; mad->need_sync = TRUE; mad->base_time = 0; mad->base_byte_offset = 0; mad->bytes_consumed = 0; mad->framestamp = 0; mad->total_samples = 0; mad->new_header = TRUE; mad->framecount = 0; mad->vbr_average = 0; mad->vbr_rate = 0; mad->restart = FALSE; mad->segment_start = 0; mad->header.mode = -1; mad->header.emphasis = -1; mad->metadata = NULL; mad->streaminfo = NULL; mad->half = FALSE; mad->ignore_crc = FALSE; GST_FLAG_SET (mad, GST_ELEMENT_EVENT_AWARE); } static void gst_mad_dispose (GObject *object) { GstMad *mad = GST_MAD (object); gst_mad_set_index (GST_ELEMENT (object), NULL); G_OBJECT_CLASS (parent_class)->dispose (object); g_free (mad->tempbuffer); } static void gst_mad_set_index (GstElement *element, GstIndex *index) { GstMad *mad = GST_MAD (element); mad->index = index; if (index) gst_index_get_writer_id (index, GST_OBJECT (element), &mad->index_id); } static GstIndex* gst_mad_get_index (GstElement *element) { GstMad *mad = GST_MAD (element); return mad->index; } static const GstFormat* gst_mad_get_formats (GstPad *pad) { static const GstFormat src_formats[] = { GST_FORMAT_BYTES, GST_FORMAT_UNITS, GST_FORMAT_TIME, 0 }; static const GstFormat sink_formats[] = { GST_FORMAT_BYTES, GST_FORMAT_TIME, 0 }; return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats); } static const GstEventMask* gst_mad_get_event_masks (GstPad *pad) { static const GstEventMask gst_mad_src_event_masks[] = { { GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH }, { 0, } }; return gst_mad_src_event_masks; } static gboolean gst_mad_convert_sink (GstPad *pad, GstFormat src_format, gint64 src_value, GstFormat *dest_format, gint64 *dest_value) { gboolean res = TRUE; GstMad *mad; mad = GST_MAD (gst_pad_get_parent (pad)); if (mad->vbr_average == 0) return FALSE; switch (src_format) { case GST_FORMAT_BYTES: switch (*dest_format) { case GST_FORMAT_DEFAULT: *dest_format = GST_FORMAT_TIME; case GST_FORMAT_TIME: /* multiply by 8 because vbr is in bits/second */ *dest_value = src_value * 8 * GST_SECOND / mad->vbr_average; break; default: res = FALSE; } break; case GST_FORMAT_TIME: switch (*dest_format) { case GST_FORMAT_DEFAULT: *dest_format = GST_FORMAT_BYTES; case GST_FORMAT_BYTES: /* multiply by 8 because vbr is in bits/second */ *dest_value = src_value * mad->vbr_average / (8 * GST_SECOND); break; default: res = FALSE; } break; default: res = FALSE; } return res; } static gboolean gst_mad_convert_src (GstPad *pad, GstFormat src_format, gint64 src_value, GstFormat *dest_format, gint64 *dest_value) { gboolean res = TRUE; guint scale = 1; gint bytes_per_sample; GstMad *mad; mad = GST_MAD (gst_pad_get_parent (pad)); bytes_per_sample = MAD_NCHANNELS (&mad->frame.header) << 1; switch (src_format) { case GST_FORMAT_BYTES: switch (*dest_format) { case GST_FORMAT_UNITS: if (bytes_per_sample == 0) return FALSE; *dest_value = src_value / bytes_per_sample; break; case GST_FORMAT_DEFAULT: *dest_format = GST_FORMAT_TIME; case GST_FORMAT_TIME: { gint byterate = bytes_per_sample * mad->frame.header.samplerate; if (byterate == 0) return FALSE; *dest_value = src_value * GST_SECOND / byterate; break; } default: res = FALSE; } break; case GST_FORMAT_UNITS: switch (*dest_format) { case GST_FORMAT_BYTES: *dest_value = src_value * bytes_per_sample; break; case GST_FORMAT_DEFAULT: *dest_format = GST_FORMAT_TIME; case GST_FORMAT_TIME: if (mad->frame.header.samplerate == 0) return FALSE; *dest_value = src_value * GST_SECOND / mad->frame.header.samplerate; break; default: res = FALSE; } break; case GST_FORMAT_TIME: switch (*dest_format) { case GST_FORMAT_DEFAULT: *dest_format = GST_FORMAT_BYTES; case GST_FORMAT_BYTES: scale = bytes_per_sample; /* fallthrough */ case GST_FORMAT_UNITS: *dest_value = src_value * scale * mad->frame.header.samplerate / GST_SECOND; break; default: res = FALSE; } break; default: res = FALSE; } return res; } static const GstQueryType* gst_mad_get_query_types (GstPad *pad) { static const GstQueryType gst_mad_src_query_types[] = { GST_QUERY_TOTAL, GST_QUERY_POSITION, 0 }; return gst_mad_src_query_types; } static gboolean gst_mad_src_query (GstPad *pad, GstQueryType type, GstFormat *format, gint64 *value) { gboolean res = TRUE; GstMad *mad; mad = GST_MAD (gst_pad_get_parent (pad)); switch (type) { case GST_QUERY_TOTAL: { switch (*format) { case GST_FORMAT_DEFAULT: *format = GST_FORMAT_TIME; /* fallthrough */ case GST_FORMAT_BYTES: case GST_FORMAT_UNITS: case GST_FORMAT_TIME: { gint64 peer_value; const GstFormat *peer_formats; res = FALSE; peer_formats = gst_pad_get_formats (GST_PAD_PEER (mad->sinkpad)); while (peer_formats && *peer_formats && !res) { GstFormat peer_format = *peer_formats; /* do the probe */ if (gst_pad_query (GST_PAD_PEER (mad->sinkpad), GST_QUERY_TOTAL, &peer_format, &peer_value)) { GstFormat conv_format; /* convert to TIME */ conv_format = GST_FORMAT_TIME; res = gst_pad_convert (mad->sinkpad, peer_format, peer_value, &conv_format, value); /* and to final format */ res &= gst_pad_convert (pad, GST_FORMAT_TIME, *value, format, value); } peer_formats++; } break; } default: res = FALSE; break; } break; } case GST_QUERY_POSITION: switch (*format) { case GST_FORMAT_DEFAULT: *format = GST_FORMAT_TIME; /* fall through */ default: { GstFormat time_format; gint64 samples; time_format = GST_FORMAT_UNITS; res = gst_pad_convert (pad, GST_FORMAT_TIME, mad->base_time, &time_format, &samples); /* we only know about our samples, convert to requested format */ res &= gst_pad_convert (pad, GST_FORMAT_UNITS, mad->total_samples + samples, format, value); break; } } break; default: res = FALSE; break; } return res; } static gboolean index_seek (GstMad *mad, GstPad *pad, GstEvent *event) { /* since we know the exact byteoffset of the frame, make sure to try bytes first */ const GstFormat try_all_formats[] = { GST_FORMAT_BYTES, GST_FORMAT_TIME, 0 }; const GstFormat *try_formats = try_all_formats; const GstFormat *peer_formats; GstIndexEntry *entry = gst_index_get_assoc_entry (mad->index, mad->index_id, GST_INDEX_LOOKUP_BEFORE, 0, GST_EVENT_SEEK_FORMAT (event), GST_EVENT_SEEK_OFFSET (event)); if (!entry) return FALSE; peer_formats = gst_pad_get_formats (GST_PAD_PEER (mad->sinkpad)); while (gst_formats_contains (peer_formats, *try_formats)) { gint64 value; if (gst_index_entry_assoc_map (entry, *try_formats, &value)) { /* lookup succeeded, create the seek */ GstEvent *seek_event = gst_event_new_seek (*try_formats | GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH, value); if (gst_pad_send_event (GST_PAD_PEER (mad->sinkpad), seek_event)) { /* seek worked, we're done, loop will exit */ mad->restart = TRUE; g_assert (GST_EVENT_SEEK_FORMAT (event) == GST_FORMAT_TIME); mad->segment_start = GST_EVENT_SEEK_OFFSET (event); return TRUE; } } try_formats++; } return FALSE; } static gboolean normal_seek (GstMad *mad, GstPad *pad, GstEvent *event) { gint64 src_offset; gboolean flush; GstFormat format; const GstFormat *peer_formats; gboolean res; format = GST_FORMAT_TIME; /* first bring the src_format to TIME */ if (!gst_pad_convert (pad, GST_EVENT_SEEK_FORMAT (event), GST_EVENT_SEEK_OFFSET (event), &format, &src_offset)) { /* didn't work, probably unsupported seek format then */ return FALSE; } /* shave off the flush flag, we'll need it later */ flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH; /* assume the worst */ res = FALSE; peer_formats = gst_pad_get_formats (GST_PAD_PEER (mad->sinkpad)); /* while we did not exhaust our seek formats without result */ while (peer_formats && *peer_formats && !res) { gint64 desired_offset; format = *peer_formats; /* 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 (format | 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; } } /* 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; peer_formats++; } return res; } static gboolean gst_mad_src_event (GstPad *pad, GstEvent *event) { gboolean res = TRUE; GstMad *mad; mad = GST_MAD (gst_pad_get_parent (pad)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEEK_SEGMENT: gst_event_ref (event); if (gst_pad_send_event (GST_PAD_PEER (mad->sinkpad), event)) { /* seek worked, we're done, loop will exit */ res = TRUE; } break; /* the all-formats seek logic */ case GST_EVENT_SEEK: if (!mad->can_seek) { g_warning ("MAD: can't seek now, seek ignored"); break; } if (mad->index) res = index_seek (mad, pad, event); else res = normal_seek (mad, pad, event); break; default: res = FALSE; break; } gst_event_unref (event); 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; g_return_if_fail (GST_IS_MAD (object)); mad = GST_MAD (object); switch (prop_id) { case ARG_HALF: mad->half = g_value_get_boolean (value); break; case ARG_IGNORE_CRC: mad->ignore_crc = g_value_get_boolean (value); break; 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; g_return_if_fail (GST_IS_MAD (object)); mad = GST_MAD (object); switch (prop_id) { case ARG_HALF: g_value_set_boolean (value, mad->half); break; case ARG_IGNORE_CRC: g_value_set_boolean (value, mad->ignore_crc); break; case ARG_METADATA: g_value_set_boxed (value, mad->metadata); break; case ARG_STREAMINFO: g_value_set_boxed (value, mad->streaminfo); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static GstCaps* gst_mad_get_streaminfo (GstMad *mad) { GstCaps *caps; GstProps *props; GstPropsEntry *entry; GEnumValue *value; GEnumClass *klass; props = gst_props_empty_new (); entry = gst_props_entry_new ("layer", GST_PROPS_INT (mad->header.layer)); gst_props_add_entry (props, (GstPropsEntry *) entry); klass = g_type_class_ref (GST_TYPE_MAD_MODE); value = g_enum_get_value (klass, mad->header.mode); entry = gst_props_entry_new ("mode", GST_PROPS_STRING (value->value_nick)); g_type_class_unref (klass); gst_props_add_entry (props, (GstPropsEntry *) entry); klass = g_type_class_ref (GST_TYPE_MAD_EMPHASIS); value = g_enum_get_value (klass, mad->header.emphasis); entry = gst_props_entry_new ("emphasis", GST_PROPS_STRING (value->value_nick)); g_type_class_unref (klass); gst_props_add_entry (props, (GstPropsEntry *) entry); caps = gst_caps_new ("mad_streaminfo", "application/x-gst-streaminfo", props); return caps; } static void gst_mad_update_info (GstMad *mad) { gint abr = mad->vbr_average; struct mad_header *header = &mad->frame.header; gboolean changed = FALSE; #define CHECK_HEADER(h1,str) \ G_STMT_START{ \ if (mad->header.h1 != header->h1 || mad->new_header) { \ mad->header.h1 = header->h1; \ changed = TRUE; \ }; \ } G_STMT_END /* 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); CHECK_HEADER (layer, "layer"); CHECK_HEADER (mode, "mode"); CHECK_HEADER (emphasis, "emphasis"); if (header->bitrate != mad->header.bitrate || mad->new_header) { mad->header.bitrate = header->bitrate; } mad->new_header = FALSE; if (changed) { gst_caps_replace_sink (&mad->streaminfo, gst_mad_get_streaminfo (mad)); g_object_notify (G_OBJECT (mad), "streaminfo"); } #undef CHECK_HEADER } /* gracefuly ripped from madplay */ static GstCaps* id3_to_caps(struct id3_tag const *tag) { unsigned int i; struct id3_frame const *frame; id3_ucs4_t const *ucs4; id3_utf8_t *utf8; GstProps *props; GstPropsEntry *entry; GstCaps *caps; GList *values; struct { char const *id; char const *name; } const info[] = { { ID3_FRAME_TITLE, "Title" }, { "TIT3", "Subtitle" }, { "TCOP", "Copyright" }, { "TPRO", "Produced" }, { "TCOM", "Composer" }, { ID3_FRAME_ARTIST, "Artist" }, { "TPE2", "Orchestra" }, { "TPE3", "Conductor" }, { "TEXT", "Lyricist" }, { ID3_FRAME_ALBUM, "Album" }, { ID3_FRAME_YEAR, "Year" }, { ID3_FRAME_TRACK, "Track" }, { "TPUB", "Publisher" }, { ID3_FRAME_GENRE, "Genre" }, { "TRSN", "Station" }, { "TENC", "Encoder" }, }; /* text information */ props = gst_props_empty_new (); for (i = 0; i < sizeof(info) / sizeof(info[0]); ++i) { union id3_field const *field; unsigned int nstrings, namelen, j; char const *name; frame = id3_tag_findframe(tag, info[i].id, 0); if (frame == 0) continue; field = &frame->fields[1]; nstrings = id3_field_getnstrings(field); name = info[i].name; if (name) { namelen = name ? strlen(name) : 0; values = NULL; for (j = 0; j < nstrings; ++j) { ucs4 = id3_field_getstrings(field, j); g_assert(ucs4); if (strcmp(info[i].id, ID3_FRAME_GENRE) == 0) ucs4 = id3_genre_name(ucs4); utf8 = id3_ucs4_utf8duplicate(ucs4); if (utf8 == 0) goto fail; entry = gst_props_entry_new (name, GST_PROPS_STRING_TYPE, utf8); values = g_list_prepend (values, entry); free(utf8); } if (values) { values = g_list_reverse (values); if (g_list_length (values) == 1) { gst_props_add_entry (props, (GstPropsEntry *) values->data); } else { entry = gst_props_entry_new(name, GST_PROPS_GLIST_TYPE, values); gst_props_add_entry (props, (GstPropsEntry *) entry); } g_list_free (values); } } } values = NULL; i = 0; while ((frame = id3_tag_findframe(tag, ID3_FRAME_COMMENT, i++))) { ucs4 = id3_field_getstring(&frame->fields[2]); g_assert(ucs4); if (*ucs4) continue; ucs4 = id3_field_getfullstring(&frame->fields[3]); g_assert(ucs4); utf8 = id3_ucs4_utf8duplicate(ucs4); if (utf8 == 0) goto fail; entry = gst_props_entry_new ("Comment", GST_PROPS_STRING_TYPE, utf8); values = g_list_prepend (values, entry); free(utf8); } if (values) { values = g_list_reverse (values); if (g_list_length (values) == 1) { gst_props_add_entry (props, (GstPropsEntry *) values->data); } else { entry = gst_props_entry_new("Comment", GST_PROPS_GLIST_TYPE, values); gst_props_add_entry (props, (GstPropsEntry *) entry); } g_list_free (values); } gst_props_debug (props); caps = gst_caps_new ("mad_metadata", "application/x-gst-metadata", props); if (0) { fail: g_warning ("mad: could not parse ID3 tag"); return NULL; } return caps; } static void gst_mad_handle_event (GstPad *pad, GstBuffer *buffer) { GstEvent *event = GST_EVENT (buffer); GstMad *mad = GST_MAD (gst_pad_get_parent (pad)); 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++) { const GstFormat *formats; formats = gst_pad_get_formats (pad); if (gst_formats_contains (formats, GST_EVENT_DISCONT_OFFSET(event, i).format)) { 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; } /* for now, this is the best we can do. Let's hope a real timestamp * arrives with the next buffer */ mad->base_time = time; gst_event_unref (event); if (GST_PAD_IS_USABLE (mad->srcpad)) { 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; } static gboolean gst_mad_check_restart (GstMad *mad) { gboolean yes = mad->restart; if (mad->restart) { mad->restart = FALSE; mad->tempsize = 0; } return yes; } static void gst_mad_chain (GstPad *pad, GstBuffer *buffer) { GstMad *mad; gchar *data; glong size; gboolean new_pts = FALSE; GstClockTime timestamp; mad = GST_MAD (gst_pad_get_parent (pad)); g_return_if_fail (GST_IS_MAD (mad)); /* handle events */ if (GST_IS_EVENT (buffer)) { gst_mad_handle_event (pad, buffer); return; } gst_mad_check_restart (mad); timestamp = GST_BUFFER_TIMESTAMP (buffer); /* handle timestamps */ if (timestamp != -1) { /* if there is nothing queued (partial buffer), we prepare to set the * timestamp on the next buffer */ if (mad->tempsize == 0) { mad->base_time = timestamp; mad->total_samples = 0; mad->base_byte_offset = GST_BUFFER_OFFSET (buffer); mad->bytes_consumed = 0; } /* else we need to finish the current partial frame with the old timestamp * and queue this timestamp for the next frame */ else { new_pts = TRUE; } } /* handle data */ data = GST_BUFFER_DATA (buffer); size = GST_BUFFER_SIZE (buffer); /* process the incoming buffer in chunks of maximum MAD_BUFFER_MDLEN bytes; * this is the upper limit on processable chunk sizes set by mad */ while (size > 0) { gint tocopy; guchar *mad_input_buffer; tocopy = MIN (MAD_BUFFER_MDLEN, size); /* append the chunk to process to our internal temporary buffer */ memcpy (mad->tempbuffer + mad->tempsize, data, tocopy); mad->tempsize += tocopy; /* update our incoming buffer's parameters to reflect this */ size -= tocopy; data += tocopy; mad_input_buffer = mad->tempbuffer; /* while we have data we can consume it */ while (mad->tempsize >= 0) { gint consumed; guint nchannels; guint nsamples; gint rate; guint64 time_offset; 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; } else if (mad->stream.error == MAD_ERROR_LOSTSYNC) { /* lost sync, force a resync */ signed long tagsize; tagsize = id3_tag_query (mad->stream.this_frame, mad->stream.bufend - mad->stream.this_frame); if (tagsize > mad->tempsize) { GST_INFO (GST_CAT_PLUGIN_INFO, "mad: got partial id3 tag in buffer, skipping"); } else if (tagsize > 0) { struct id3_tag *tag; id3_byte_t const *data; GST_INFO (GST_CAT_PLUGIN_INFO, "mad: got ID3 tag size %ld", tagsize); data = mad->stream.this_frame; /* mad has moved the pointer to the next frame over the start of the * id3 tags, so we need to flush one byte less than the tagsize */ mad_stream_skip (&mad->stream, tagsize - 1); tag = id3_tag_parse (data, tagsize); if (tag) { gst_caps_replace_sink (&mad->metadata, id3_to_caps (tag)); id3_tag_delete (tag); g_object_notify (G_OBJECT (mad), "metadata"); } } } mad_frame_mute (&mad->frame); mad_synth_mute (&mad->synth); mad_stream_sync (&mad->stream); /* recoverable errors pass */ goto next; } nchannels = MAD_NCHANNELS (&mad->frame.header); nsamples = MAD_NSBSAMPLES (&mad->frame.header) * (mad->stream.options & MAD_OPTION_HALFSAMPLERATE ? 16 : 32); #if MAD_VERSION_MINOR <= 12 rate = mad->header.sfreq; #else rate = mad->frame.header.samplerate; #endif /* at this point we can accept seek events */ mad->can_seek = TRUE; gst_mad_update_info (mad); if (mad->channels != nchannels || mad->rate != rate) { if (mad->stream.options & MAD_OPTION_HALFSAMPLERATE) rate >>=1; /* we set the caps even when the pad is not connected so they * can be gotten for streaminfo */ 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), "rate", GST_PROPS_INT (rate), "channels", GST_PROPS_INT (nchannels), NULL))) <= 0) { gst_buffer_unref (buffer); gst_element_error (GST_ELEMENT (mad), "could not set caps on source pad, aborting..."); return; } mad->channels = nchannels; mad->rate = rate; } if (mad->frame.header.samplerate == 0) { g_warning ("mad->frame.header.samplerate is 0; timestamps cannot be calculated"); time_offset = mad->base_time + 0; } else { time_offset = mad->base_time + (mad->total_samples * GST_SECOND / mad->frame.header.samplerate); } if (mad->index) { guint64 x_bytes = mad->base_byte_offset + mad->bytes_consumed; gst_index_add_association (mad->index, mad->index_id, 0, GST_FORMAT_BYTES, x_bytes, GST_FORMAT_TIME, time_offset, NULL); } if (GST_PAD_IS_USABLE (mad->srcpad) && mad->segment_start < time_offset) { /* for sample accurate seeking, calculate how many samples to skip and send the remaining pcm samples */ GstBuffer *outbuffer; gint16 *outdata; mad_fixed_t const *left_ch, *right_ch; mad_synth_frame (&mad->synth, &mad->frame); left_ch = mad->synth.pcm.samples[0]; right_ch = mad->synth.pcm.samples[1]; outbuffer = gst_buffer_new_and_alloc (nsamples * nchannels * 2); outdata = (gint16 *) GST_BUFFER_DATA (outbuffer); GST_BUFFER_TIMESTAMP (outbuffer) = time_offset; /* output sample(s) in 16-bit signed native-endian PCM */ if (nchannels == 1) { gint count = nsamples; while (count--) { *outdata++ = scale(*left_ch++) & 0xffff; } } else { gint count = nsamples; while (count--) { *outdata++ = scale(*left_ch++) & 0xffff; *outdata++ = scale(*right_ch++) & 0xffff; } } gst_pad_push (mad->srcpad, outbuffer); } mad->total_samples += nsamples; /* we have a queued timestamp on the incoming buffer that we should * use for the next frame */ if (new_pts) { new_pts = FALSE; mad->base_time = timestamp; mad->total_samples = 0; mad->base_byte_offset = GST_BUFFER_OFFSET (buffer); mad->bytes_consumed = 0; } if (gst_mad_check_restart (mad)) { 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; mad->bytes_consumed += 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: { guint options = 0; 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; mad->rate = 0; mad->channels = 0; mad->vbr_average = 0; mad->base_time = 0; mad->segment_start = 0; mad->framestamp = 0; mad->new_header = TRUE; mad->framecount = 0; mad->vbr_rate = 0; mad->frame.header.samplerate = 0; if (mad->ignore_crc) options |= MAD_OPTION_IGNORECRC; if (mad->half) options |= MAD_OPTION_HALFSAMPLERATE; mad_stream_options (&mad->stream, options); 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->restart = TRUE; gst_caps_replace (&mad->metadata, NULL); gst_caps_replace (&mad->streaminfo, NULL); 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 };