/* -*- Mode: C; tab-width: 2; indent-tabs-mode: t; c-basic-offset: 2 -*- */ /* GStreamer AIFF parser * Copyright (C) <1999> Erik Walthinsen * <2006> Nokia Corporation, Stefan Kost . * <2008> Pioneers of the Inevitable * * * 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. */ /** * SECTION:element-aiffparse * * * * Parse a .aiff file into raw or compressed audio. * * * AIFFparse supports both push and pull mode operations, making it possible to * stream from a network source. * * Example launch line * * * gst-launch filesrc location=sine.aiff ! aiffparse ! audioconvert ! alsasink * * Read a aiff file and output to the soundcard using the ALSA element. The * aiff file is assumed to contain raw uncompressed samples. * * * * gst-launch gnomevfssrc location=http://www.example.org/sine.aiff ! queue ! aiffparse ! audioconvert ! alsasink * * Stream data from a network url. * * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif /* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex * with newer GLib versions (>= 2.31.0) */ #define GLIB_DISABLE_DEPRECATION_WARNINGS #include #include #include "aiffparse.h" #include #include #include GST_DEBUG_CATEGORY (aiffparse_debug); #define GST_CAT_DEFAULT (aiffparse_debug) static void gst_aiff_parse_dispose (GObject * object); static gboolean gst_aiff_parse_sink_activate (GstPad * sinkpad); static gboolean gst_aiff_parse_sink_activate_pull (GstPad * sinkpad, gboolean active); static gboolean gst_aiff_parse_send_event (GstElement * element, GstEvent * event); static GstStateChangeReturn gst_aiff_parse_change_state (GstElement * element, GstStateChange transition); static const GstQueryType *gst_aiff_parse_get_query_types (GstPad * pad); static gboolean gst_aiff_parse_pad_query (GstPad * pad, GstQuery * query); static gboolean gst_aiff_parse_pad_convert (GstPad * pad, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value); static GstFlowReturn gst_aiff_parse_chain (GstPad * pad, GstBuffer * buf); static void gst_aiff_parse_loop (GstPad * pad); static gboolean gst_aiff_parse_srcpad_event (GstPad * pad, GstEvent * event); static GstStaticPadTemplate sink_template_factory = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-aiff") ); static GstStaticPadTemplate src_template_factory = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS ";" GST_AUDIO_FLOAT_PAD_TEMPLATE_CAPS) ); GST_BOILERPLATE (GstAiffParse, gst_aiff_parse, GstElement, GST_TYPE_ELEMENT); static void gst_aiff_parse_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_static_pad_template (element_class, &sink_template_factory); gst_element_class_add_static_pad_template (element_class, &src_template_factory); gst_element_class_set_details_simple (element_class, "AIFF audio demuxer", "Codec/Demuxer/Audio", "Parse a .aiff file into raw audio", "Pioneers of the Inevitable "); } static void gst_aiff_parse_class_init (GstAiffParseClass * klass) { GstElementClass *gstelement_class; GObjectClass *object_class; gstelement_class = (GstElementClass *) klass; object_class = (GObjectClass *) klass; parent_class = g_type_class_peek_parent (klass); object_class->dispose = gst_aiff_parse_dispose; gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_aiff_parse_change_state); gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_aiff_parse_send_event); } static void gst_aiff_parse_reset (GstAiffParse * aiff) { aiff->state = AIFF_PARSE_START; /* These will all be set correctly in the fmt chunk */ aiff->rate = 0; aiff->width = 0; aiff->depth = 0; aiff->channels = 0; aiff->bps = 0; aiff->offset = 0; aiff->end_offset = 0; aiff->dataleft = 0; aiff->datasize = 0; aiff->datastart = 0; aiff->duration = 0; aiff->got_comm = FALSE; if (aiff->caps) { gst_caps_unref (aiff->caps); aiff->caps = NULL; } if (aiff->seek_event) gst_event_unref (aiff->seek_event); aiff->seek_event = NULL; if (aiff->adapter) { gst_adapter_clear (aiff->adapter); aiff->adapter = NULL; } if (aiff->tags != NULL) { gst_tag_list_free (aiff->tags); aiff->tags = NULL; } } static void gst_aiff_parse_dispose (GObject * object) { GstAiffParse *aiff = GST_AIFF_PARSE (object); GST_DEBUG_OBJECT (aiff, "AIFF: Dispose"); gst_aiff_parse_reset (aiff); G_OBJECT_CLASS (parent_class)->dispose (object); } static void gst_aiff_parse_init (GstAiffParse * aiffparse, GstAiffParseClass * g_class) { gst_aiff_parse_reset (aiffparse); /* sink */ aiffparse->sinkpad = gst_pad_new_from_static_template (&sink_template_factory, "sink"); gst_pad_set_activate_function (aiffparse->sinkpad, GST_DEBUG_FUNCPTR (gst_aiff_parse_sink_activate)); gst_pad_set_activatepull_function (aiffparse->sinkpad, GST_DEBUG_FUNCPTR (gst_aiff_parse_sink_activate_pull)); gst_pad_set_chain_function (aiffparse->sinkpad, GST_DEBUG_FUNCPTR (gst_aiff_parse_chain)); gst_element_add_pad (GST_ELEMENT_CAST (aiffparse), aiffparse->sinkpad); /* source */ aiffparse->srcpad = gst_pad_new_from_static_template (&src_template_factory, "src"); gst_pad_use_fixed_caps (aiffparse->srcpad); gst_pad_set_query_type_function (aiffparse->srcpad, GST_DEBUG_FUNCPTR (gst_aiff_parse_get_query_types)); gst_pad_set_query_function (aiffparse->srcpad, GST_DEBUG_FUNCPTR (gst_aiff_parse_pad_query)); gst_pad_set_event_function (aiffparse->srcpad, GST_DEBUG_FUNCPTR (gst_aiff_parse_srcpad_event)); gst_element_add_pad (GST_ELEMENT_CAST (aiffparse), aiffparse->srcpad); } static gboolean gst_aiff_parse_parse_file_header (GstAiffParse * aiff, GstBuffer * buf) { guint8 *data; guint32 header, type = 0; if (GST_BUFFER_SIZE (buf) < 12) { GST_WARNING_OBJECT (aiff, "Buffer too short"); goto not_aiff; } data = GST_BUFFER_DATA (buf); header = GST_READ_UINT32_LE (data); type = GST_READ_UINT32_LE (data + 8); if (header != GST_MAKE_FOURCC ('F', 'O', 'R', 'M')) goto not_aiff; if (type == GST_MAKE_FOURCC ('A', 'I', 'F', 'F')) aiff->is_aifc = FALSE; else if (type == GST_MAKE_FOURCC ('A', 'I', 'F', 'C')) aiff->is_aifc = TRUE; else goto not_aiff; gst_buffer_unref (buf); return TRUE; /* ERRORS */ not_aiff: { GST_ELEMENT_ERROR (aiff, STREAM, WRONG_TYPE, (NULL), ("File is not an AIFF file: %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (type))); gst_buffer_unref (buf); return FALSE; } } static GstFlowReturn gst_aiff_parse_stream_init (GstAiffParse * aiff) { GstFlowReturn res; GstBuffer *buf = NULL; if ((res = gst_pad_pull_range (aiff->sinkpad, aiff->offset, 12, &buf)) != GST_FLOW_OK) return res; else if (!gst_aiff_parse_parse_file_header (aiff, buf)) return GST_FLOW_ERROR; aiff->offset += 12; return GST_FLOW_OK; } /* This function is used to perform seeks on the element in * pull mode. * * It also works when event is NULL, in which case it will just * start from the last configured segment. This technique is * used when activating the element and to perform the seek in * READY. */ static gboolean gst_aiff_parse_perform_seek (GstAiffParse * aiff, GstEvent * event) { gboolean res; gdouble rate; GstFormat format, bformat; GstSeekFlags flags; GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type; gint64 cur, stop, upstream_size; gboolean flush; gboolean update; GstSegment seeksegment = { 0, }; gint64 last_stop; if (event) { GST_DEBUG_OBJECT (aiff, "doing seek with event"); gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur, &stop_type, &stop); /* no negative rates yet */ if (rate < 0.0) goto negative_rate; if (format != aiff->segment.format) { GST_INFO_OBJECT (aiff, "converting seek-event from %s to %s", gst_format_get_name (format), gst_format_get_name (aiff->segment.format)); res = TRUE; if (cur_type != GST_SEEK_TYPE_NONE) res = gst_pad_query_convert (aiff->srcpad, format, cur, &aiff->segment.format, &cur); if (res && stop_type != GST_SEEK_TYPE_NONE) res = gst_pad_query_convert (aiff->srcpad, format, stop, &aiff->segment.format, &stop); if (!res) goto no_format; format = aiff->segment.format; } } else { GST_DEBUG_OBJECT (aiff, "doing seek without event"); flags = 0; rate = 1.0; cur_type = GST_SEEK_TYPE_SET; stop_type = GST_SEEK_TYPE_SET; } /* get flush flag */ flush = flags & GST_SEEK_FLAG_FLUSH; /* now we need to make sure the streaming thread is stopped. We do this by * either sending a FLUSH_START event downstream which will cause the * streaming thread to stop with a WRONG_STATE. * For a non-flushing seek we simply pause the task, which will happen as soon * as it completes one iteration (and thus might block when the sink is * blocking in preroll). */ if (flush) { GST_DEBUG_OBJECT (aiff, "sending flush start"); gst_pad_push_event (aiff->srcpad, gst_event_new_flush_start ()); } else { gst_pad_pause_task (aiff->sinkpad); } /* we should now be able to grab the streaming thread because we stopped it * with the above flush/pause code */ GST_PAD_STREAM_LOCK (aiff->sinkpad); /* save current position */ last_stop = aiff->segment.last_stop; GST_DEBUG_OBJECT (aiff, "stopped streaming at %" G_GINT64_FORMAT, last_stop); /* copy segment, we need this because we still need the old * segment when we close the current segment. */ memcpy (&seeksegment, &aiff->segment, sizeof (GstSegment)); /* configure the seek parameters in the seeksegment. We will then have the * right values in the segment to perform the seek */ if (event) { GST_DEBUG_OBJECT (aiff, "configuring seek"); gst_segment_set_seek (&seeksegment, rate, format, flags, cur_type, cur, stop_type, stop, &update); } /* figure out the last position we need to play. If it's configured (stop != * -1), use that, else we play until the total duration of the file */ if ((stop = seeksegment.stop) == -1) stop = seeksegment.duration; GST_DEBUG_OBJECT (aiff, "cur_type =%d", cur_type); if ((cur_type != GST_SEEK_TYPE_NONE)) { /* bring offset to bytes, if the bps is 0, we have the segment in BYTES and * we can just copy the last_stop. If not, we use the bps to convert TIME to * bytes. */ if (aiff->bps > 0) aiff->offset = gst_util_uint64_scale_ceil (seeksegment.last_stop, (guint64) aiff->bps, GST_SECOND); else aiff->offset = seeksegment.last_stop; GST_LOG_OBJECT (aiff, "offset=%" G_GUINT64_FORMAT, aiff->offset); aiff->offset -= (aiff->offset % aiff->bytes_per_sample); GST_LOG_OBJECT (aiff, "offset=%" G_GUINT64_FORMAT, aiff->offset); aiff->offset += aiff->datastart; GST_LOG_OBJECT (aiff, "offset=%" G_GUINT64_FORMAT, aiff->offset); } else { GST_LOG_OBJECT (aiff, "continue from offset=%" G_GUINT64_FORMAT, aiff->offset); } if (stop_type != GST_SEEK_TYPE_NONE) { if (aiff->bps > 0) aiff->end_offset = gst_util_uint64_scale_ceil (stop, (guint64) aiff->bps, GST_SECOND); else aiff->end_offset = stop; GST_LOG_OBJECT (aiff, "end_offset=%" G_GUINT64_FORMAT, aiff->end_offset); aiff->end_offset -= (aiff->end_offset % aiff->bytes_per_sample); GST_LOG_OBJECT (aiff, "end_offset=%" G_GUINT64_FORMAT, aiff->end_offset); aiff->end_offset += aiff->datastart; GST_LOG_OBJECT (aiff, "end_offset=%" G_GUINT64_FORMAT, aiff->end_offset); } else { GST_LOG_OBJECT (aiff, "continue to end_offset=%" G_GUINT64_FORMAT, aiff->end_offset); } /* make sure filesize is not exceeded due to rounding errors or so, * same precaution as in _stream_headers */ bformat = GST_FORMAT_BYTES; if (gst_pad_query_peer_duration (aiff->sinkpad, &bformat, &upstream_size)) aiff->end_offset = MIN (aiff->end_offset, upstream_size); /* this is the range of bytes we will use for playback */ aiff->offset = MIN (aiff->offset, aiff->end_offset); aiff->dataleft = aiff->end_offset - aiff->offset; GST_DEBUG_OBJECT (aiff, "seek: rate %lf, offset %" G_GUINT64_FORMAT ", end %" G_GUINT64_FORMAT ", segment %" GST_TIME_FORMAT " -- %" GST_TIME_FORMAT, rate, aiff->offset, aiff->end_offset, GST_TIME_ARGS (seeksegment.start), GST_TIME_ARGS (stop)); /* prepare for streaming again */ if (flush) { /* if we sent a FLUSH_START, we now send a FLUSH_STOP */ GST_DEBUG_OBJECT (aiff, "sending flush stop"); gst_pad_push_event (aiff->srcpad, gst_event_new_flush_stop ()); } else if (aiff->segment_running) { /* we are running the current segment and doing a non-flushing seek, * close the segment first based on the previous last_stop. */ GST_DEBUG_OBJECT (aiff, "closing running segment %" G_GINT64_FORMAT " to %" G_GINT64_FORMAT, aiff->segment.accum, aiff->segment.last_stop); /* queue the segment for sending in the stream thread */ if (aiff->close_segment) gst_event_unref (aiff->close_segment); aiff->close_segment = gst_event_new_new_segment (TRUE, aiff->segment.rate, aiff->segment.format, aiff->segment.accum, aiff->segment.last_stop, aiff->segment.accum); /* keep track of our last_stop */ seeksegment.accum = aiff->segment.last_stop; } /* now we did the seek and can activate the new segment values */ memcpy (&aiff->segment, &seeksegment, sizeof (GstSegment)); /* if we're doing a segment seek, post a SEGMENT_START message */ if (aiff->segment.flags & GST_SEEK_FLAG_SEGMENT) { gst_element_post_message (GST_ELEMENT_CAST (aiff), gst_message_new_segment_start (GST_OBJECT_CAST (aiff), aiff->segment.format, aiff->segment.last_stop)); } /* now create the newsegment */ GST_DEBUG_OBJECT (aiff, "Creating newsegment from %" G_GINT64_FORMAT " to %" G_GINT64_FORMAT, aiff->segment.last_stop, stop); /* store the newsegment event so it can be sent from the streaming thread. */ if (aiff->start_segment) gst_event_unref (aiff->start_segment); aiff->start_segment = gst_event_new_new_segment (FALSE, aiff->segment.rate, aiff->segment.format, aiff->segment.last_stop, stop, aiff->segment.last_stop); /* mark discont if we are going to stream from another position. */ if (last_stop != aiff->segment.last_stop) { GST_DEBUG_OBJECT (aiff, "mark DISCONT, we did a seek to another position"); aiff->discont = TRUE; } /* and start the streaming task again */ aiff->segment_running = TRUE; if (!aiff->streaming) { gst_pad_start_task (aiff->sinkpad, (GstTaskFunction) gst_aiff_parse_loop, aiff->sinkpad); } GST_PAD_STREAM_UNLOCK (aiff->sinkpad); return TRUE; /* ERRORS */ negative_rate: { GST_DEBUG_OBJECT (aiff, "negative playback rates are not supported yet."); return FALSE; } no_format: { GST_DEBUG_OBJECT (aiff, "unsupported format given, seek aborted."); return FALSE; } } /* * gst_aiff_parse_peek_chunk_info: * @aiff AIFFparse object * @tag holder for tag * @size holder for tag size * * Peek next chunk info (tag and size) * * Returns: %TRUE when the chunk info (header) is available */ static gboolean gst_aiff_parse_peek_chunk_info (GstAiffParse * aiff, guint32 * tag, guint32 * size) { const guint8 *data = NULL; if (gst_adapter_available (aiff->adapter) < 8) return FALSE; data = gst_adapter_peek (aiff->adapter, 8); *tag = GST_READ_UINT32_LE (data); *size = GST_READ_UINT32_BE (data + 4); GST_DEBUG ("Next chunk size is %d bytes, type %" GST_FOURCC_FORMAT, *size, GST_FOURCC_ARGS (*tag)); return TRUE; } /* * gst_aiff_parse_peek_chunk: * @aiff AIFFparse object * @tag holder for tag * @size holder for tag size * * Peek enough data for one full chunk * * Returns: %TRUE when the full chunk is available */ static gboolean gst_aiff_parse_peek_chunk (GstAiffParse * aiff, guint32 * tag, guint32 * size) { guint32 peek_size = 0; guint available; if (!gst_aiff_parse_peek_chunk_info (aiff, tag, size)) return FALSE; GST_DEBUG ("Need to peek chunk of %d bytes", *size); peek_size = (*size + 1) & ~1; available = gst_adapter_available (aiff->adapter); if (available >= (8 + peek_size)) { return TRUE; } else { GST_LOG ("but only %u bytes available now", available); return FALSE; } } static gboolean gst_aiff_parse_peek_data (GstAiffParse * aiff, guint32 size, const guint8 ** data) { if (gst_adapter_available (aiff->adapter) < size) return FALSE; *data = gst_adapter_peek (aiff->adapter, size); return TRUE; } /* * gst_aiff_parse_calculate_duration: * @aiff: aiffparse object * * Calculate duration on demand and store in @aiff. * * Returns: %TRUE if duration is available. */ static gboolean gst_aiff_parse_calculate_duration (GstAiffParse * aiff) { if (aiff->duration > 0) return TRUE; if (aiff->datasize > 0 && aiff->bps > 0) { aiff->duration = gst_util_uint64_scale_ceil (aiff->datasize, GST_SECOND, (guint64) aiff->bps); GST_INFO_OBJECT (aiff, "Got duration %" GST_TIME_FORMAT, GST_TIME_ARGS (aiff->duration)); return TRUE; } return FALSE; } static void gst_aiff_parse_ignore_chunk (GstAiffParse * aiff, GstBuffer * buf, guint32 tag, guint32 size) { guint flush; if (aiff->streaming) { if (!gst_aiff_parse_peek_chunk (aiff, &tag, &size)) return; } GST_DEBUG_OBJECT (aiff, "Ignoring tag %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag)); flush = 8 + ((size + 1) & ~1); aiff->offset += flush; if (aiff->streaming) { gst_adapter_flush (aiff->adapter, flush); } else { gst_buffer_unref (buf); } } static double gst_aiff_parse_read_IEEE80 (guint8 * buf) { int s = buf[0] & 0xff; int e = ((buf[0] & 0x7f) << 8) | (buf[1] & 0xff); double f = ((unsigned long) (buf[2] & 0xff) << 24) | ((buf[3] & 0xff) << 16) | ((buf[4] & 0xff) << 8) | (buf[5] & 0xff); if (e == 32767) { if (buf[2] & 0x80) return HUGE_VAL; /* Really NaN, but this won't happen in reality */ else { if (s) return -HUGE_VAL; else return HUGE_VAL; } } f = ldexp (f, 32); f += ((buf[6] & 0xff) << 24) | ((buf[7] & 0xff) << 16) | ((buf[8] & 0xff) << 8) | (buf[9] & 0xff); return ldexp (f, e - 16446); } static gboolean gst_aiff_parse_parse_comm (GstAiffParse * aiff, GstBuffer * buf) { guint8 *data; int size; if (aiff->is_aifc) size = 22; else size = 18; if (GST_BUFFER_SIZE (buf) < size) { GST_WARNING_OBJECT (aiff, "COMM chunk too short, cannot parse header"); return FALSE; } data = GST_BUFFER_DATA (buf); aiff->channels = GST_READ_UINT16_BE (data); aiff->total_frames = GST_READ_UINT32_BE (data + 2); aiff->depth = GST_READ_UINT16_BE (data + 6); aiff->width = GST_ROUND_UP_8 (aiff->depth); aiff->rate = (int) gst_aiff_parse_read_IEEE80 (data + 8); aiff->floating_point = FALSE; if (aiff->is_aifc) { guint32 fourcc = GST_READ_UINT32_LE (data + 18); /* We only support the 'trivial' uncompressed AIFC, but it can be * either big or little endian */ switch (fourcc) { case GST_MAKE_FOURCC ('N', 'O', 'N', 'E'): aiff->endianness = G_BIG_ENDIAN; break; case GST_MAKE_FOURCC ('s', 'o', 'w', 't'): aiff->endianness = G_LITTLE_ENDIAN; break; case GST_MAKE_FOURCC ('F', 'L', '3', '2'): case GST_MAKE_FOURCC ('f', 'l', '3', '2'): aiff->floating_point = TRUE; aiff->width = aiff->depth = 32; aiff->endianness = G_BIG_ENDIAN; break; case GST_MAKE_FOURCC ('f', 'l', '6', '4'): aiff->floating_point = TRUE; aiff->width = aiff->depth = 64; aiff->endianness = G_BIG_ENDIAN; break; default: GST_WARNING_OBJECT (aiff, "Unsupported compression in AIFC " "file: %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (GST_READ_UINT32_LE (data + 18))); return FALSE; } } else aiff->endianness = G_BIG_ENDIAN; return TRUE; } static GstFlowReturn gst_aiff_parse_read_chunk (GstAiffParse * aiff, guint64 * offset, guint32 * tag, GstBuffer ** data) { guint size; GstFlowReturn res; GstBuffer *buf; if ((res = gst_pad_pull_range (aiff->sinkpad, *offset, 8, &buf)) != GST_FLOW_OK) return res; *tag = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf)); size = GST_READ_UINT32_BE (GST_BUFFER_DATA (buf) + 4); if ((res = gst_pad_pull_range (aiff->sinkpad, (*offset) + 8, size, &buf)) != GST_FLOW_OK) return res; else if (GST_BUFFER_SIZE (buf) < size) goto too_small; *data = buf; *offset += 8 + GST_ROUND_UP_2 (size); return GST_FLOW_OK; /* ERRORS */ too_small: { /* short read, we return UNEXPECTED to mark the EOS case */ GST_DEBUG_OBJECT (aiff, "not enough data (available=%u, needed=%u)", GST_BUFFER_SIZE (buf), size); gst_buffer_unref (buf); return GST_FLOW_UNEXPECTED; } } static GstCaps * gst_aiff_parse_create_caps (GstAiffParse * aiff) { GstCaps *caps; if (aiff->floating_point) { caps = gst_caps_new_simple ("audio/x-raw-float", "width", G_TYPE_INT, aiff->width, "channels", G_TYPE_INT, aiff->channels, "endianness", G_TYPE_INT, aiff->endianness, "rate", G_TYPE_INT, aiff->rate, NULL); } else { caps = gst_caps_new_simple ("audio/x-raw-int", "width", G_TYPE_INT, aiff->width, "depth", G_TYPE_INT, aiff->depth, "channels", G_TYPE_INT, aiff->channels, "endianness", G_TYPE_INT, aiff->endianness, "rate", G_TYPE_INT, aiff->rate, "signed", G_TYPE_BOOLEAN, TRUE, NULL); } GST_DEBUG_OBJECT (aiff, "Created caps: %" GST_PTR_FORMAT, caps); return caps; } static GstFlowReturn gst_aiff_parse_stream_headers (GstAiffParse * aiff) { GstFlowReturn res; GstBuffer *buf; guint32 tag, size; gboolean gotdata = FALSE; gboolean done = FALSE; GstEvent **event_p; GstFormat bformat; gint64 upstream_size = 0; bformat = GST_FORMAT_BYTES; gst_pad_query_peer_duration (aiff->sinkpad, &bformat, &upstream_size); GST_DEBUG_OBJECT (aiff, "upstream size %" G_GUINT64_FORMAT, upstream_size); /* loop headers until we get data */ while (!done) { if (aiff->streaming) { if (!gst_aiff_parse_peek_chunk_info (aiff, &tag, &size)) return GST_FLOW_OK; } else { if ((res = gst_pad_pull_range (aiff->sinkpad, aiff->offset, 8, &buf)) != GST_FLOW_OK) goto header_read_error; tag = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf)); size = GST_READ_UINT32_BE (GST_BUFFER_DATA (buf) + 4); } GST_INFO_OBJECT (aiff, "Got TAG: %" GST_FOURCC_FORMAT ", offset %" G_GUINT64_FORMAT, GST_FOURCC_ARGS (tag), aiff->offset); /* We just keep reading chunks until we find the one we're interested in. */ switch (tag) { case GST_MAKE_FOURCC ('C', 'O', 'M', 'M'):{ if (aiff->streaming) { if (!gst_aiff_parse_peek_chunk (aiff, &tag, &size)) return GST_FLOW_OK; gst_adapter_flush (aiff->adapter, 8); aiff->offset += 8; buf = gst_adapter_take_buffer (aiff->adapter, size); } else { if ((res = gst_aiff_parse_read_chunk (aiff, &aiff->offset, &tag, &buf)) != GST_FLOW_OK) return res; } if (!gst_aiff_parse_parse_comm (aiff, buf)) { gst_buffer_unref (buf); goto parse_header_error; } gst_buffer_unref (buf); /* do sanity checks of header fields */ if (aiff->channels == 0) goto no_channels; if (aiff->rate == 0) goto no_rate; GST_DEBUG_OBJECT (aiff, "creating the caps"); aiff->caps = gst_aiff_parse_create_caps (aiff); if (!aiff->caps) goto unknown_format; gst_pad_set_caps (aiff->srcpad, aiff->caps); aiff->bytes_per_sample = aiff->channels * aiff->width / 8; aiff->bps = aiff->bytes_per_sample * aiff->rate; if (aiff->bytes_per_sample <= 0) goto no_bytes_per_sample; aiff->got_comm = TRUE; break; } case GST_MAKE_FOURCC ('S', 'S', 'N', 'D'):{ GstBuffer *ssndbuf = NULL; const guint8 *ssnddata = NULL; guint32 datasize; GST_DEBUG_OBJECT (aiff, "Got 'SSND' TAG, size : %d", size); /* Now, read the 8-byte header in the SSND chunk */ if (aiff->streaming) { if (!gst_aiff_parse_peek_data (aiff, 16, &ssnddata)) return GST_FLOW_OK; } else { gst_buffer_unref (buf); if ((res = gst_pad_pull_range (aiff->sinkpad, aiff->offset, 16, &ssndbuf)) != GST_FLOW_OK) goto header_read_error; ssnddata = GST_BUFFER_DATA (ssndbuf); } aiff->ssnd_offset = GST_READ_UINT32_BE (ssnddata + 8); aiff->ssnd_blocksize = GST_READ_UINT32_BE (ssnddata + 12); gotdata = TRUE; if (aiff->streaming) { gst_adapter_flush (aiff->adapter, 16); } else { gst_buffer_unref (ssndbuf); } /* 8 byte chunk header, 8 byte SSND header */ aiff->offset += 16; datasize = size - 16; aiff->datastart = aiff->offset + aiff->ssnd_offset; /* file might be truncated */ if (upstream_size) { size = MIN (datasize, (upstream_size - aiff->datastart)); } aiff->datasize = (guint64) datasize; aiff->dataleft = (guint64) datasize; aiff->end_offset = datasize + aiff->datastart; if (!aiff->streaming) { /* We will continue looking at chunks until the end - to read tags, * etc. */ aiff->offset += datasize; } GST_DEBUG_OBJECT (aiff, "datasize = %d", datasize); if (aiff->streaming) { done = TRUE; } break; } case GST_MAKE_FOURCC ('I', 'D', '3', ' '):{ GstTagList *tags; if (aiff->streaming) { if (!gst_aiff_parse_peek_chunk (aiff, &tag, &size)) return GST_FLOW_OK; gst_adapter_flush (aiff->adapter, 8); aiff->offset += 8; buf = gst_adapter_take_buffer (aiff->adapter, size); } else { if ((res = gst_aiff_parse_read_chunk (aiff, &aiff->offset, &tag, &buf)) != GST_FLOW_OK) return res; } GST_LOG_OBJECT (aiff, "ID3 chunk of size %u", GST_BUFFER_SIZE (buf)); tags = gst_tag_list_from_id3v2_tag (buf); gst_buffer_unref (buf); GST_INFO_OBJECT (aiff, "ID3 tags: %" GST_PTR_FORMAT, tags); if (aiff->tags == NULL) { aiff->tags = tags; } else { gst_tag_list_insert (aiff->tags, tags, GST_TAG_MERGE_APPEND); gst_tag_list_free (tags); } break; } default: gst_aiff_parse_ignore_chunk (aiff, buf, tag, size); } if (upstream_size && (aiff->offset >= upstream_size)) { /* Now we have gone through the whole file */ done = TRUE; } } /* We read all the chunks (in pull mode) or reached the SSND chunk * (in push mode). We must have both COMM and SSND now; error out * otherwise. */ if (!aiff->got_comm) { GST_WARNING_OBJECT (aiff, "Failed to find COMM chunk"); goto no_header; } if (!gotdata) { GST_WARNING_OBJECT (aiff, "Failed to find SSND chunk"); goto no_data; } GST_DEBUG_OBJECT (aiff, "Finished parsing headers"); if (gst_aiff_parse_calculate_duration (aiff)) { gst_segment_init (&aiff->segment, GST_FORMAT_TIME); gst_segment_set_duration (&aiff->segment, GST_FORMAT_TIME, aiff->duration); } else { /* no bitrate, let downstream peer do the math, we'll feed it bytes. */ gst_segment_init (&aiff->segment, GST_FORMAT_BYTES); gst_segment_set_duration (&aiff->segment, GST_FORMAT_BYTES, aiff->datasize); } /* now we have all the info to perform a pending seek if any, if no * event, this will still do the right thing and it will also send * the right newsegment event downstream. */ gst_aiff_parse_perform_seek (aiff, aiff->seek_event); /* remove pending event */ event_p = &aiff->seek_event; gst_event_replace (event_p, NULL); /* we just started, we are discont */ aiff->discont = TRUE; aiff->state = AIFF_PARSE_DATA; return GST_FLOW_OK; /* ERROR */ no_header: { GST_ELEMENT_ERROR (aiff, STREAM, TYPE_NOT_FOUND, (NULL), ("Invalid AIFF header (no COMM found)")); return GST_FLOW_ERROR; } no_data: { GST_ELEMENT_ERROR (aiff, STREAM, TYPE_NOT_FOUND, (NULL), ("Invalid AIFF: no SSND found")); return GST_FLOW_ERROR; } parse_header_error: { GST_ELEMENT_ERROR (aiff, STREAM, DEMUX, (NULL), ("Couldn't parse audio header")); return GST_FLOW_ERROR; } no_channels: { GST_ELEMENT_ERROR (aiff, STREAM, FAILED, (NULL), ("Stream claims to contain no channels - invalid data")); return GST_FLOW_ERROR; } no_rate: { GST_ELEMENT_ERROR (aiff, STREAM, FAILED, (NULL), ("Stream with sample_rate == 0 - invalid data")); return GST_FLOW_ERROR; } no_bytes_per_sample: { GST_ELEMENT_ERROR (aiff, STREAM, FAILED, (NULL), ("Could not caluclate bytes per sample - invalid data")); return GST_FLOW_ERROR; } unknown_format: { GST_ELEMENT_ERROR (aiff, STREAM, TYPE_NOT_FOUND, (NULL), ("No caps found for format 0x%x, %d channels, %d Hz", aiff->format, aiff->channels, aiff->rate)); return GST_FLOW_ERROR; } header_read_error: { GST_ELEMENT_ERROR (aiff, STREAM, DEMUX, (NULL), ("Couldn't read in header")); return GST_FLOW_ERROR; } } /* * Read AIFF file tag when streaming */ static GstFlowReturn gst_aiff_parse_parse_stream_init (GstAiffParse * aiff) { if (gst_adapter_available (aiff->adapter) >= 12) { GstBuffer *tmp; /* _take flushes the data */ tmp = gst_adapter_take_buffer (aiff->adapter, 12); GST_DEBUG ("Parsing aiff header"); if (!gst_aiff_parse_parse_file_header (aiff, tmp)) return GST_FLOW_ERROR; aiff->offset += 12; /* Go to next state */ aiff->state = AIFF_PARSE_HEADER; } return GST_FLOW_OK; } /* handle an event sent directly to the element. * * This event can be sent either in the READY state or the * >READY state. The only event of interest really is the seek * event. * * In the READY state we can only store the event and try to * respect it when going to PAUSED. We assume we are in the * READY state when our parsing state != AIFF_PARSE_DATA. * * When we are steaming, we can simply perform the seek right * away. */ static gboolean gst_aiff_parse_send_event (GstElement * element, GstEvent * event) { GstAiffParse *aiff = GST_AIFF_PARSE (element); gboolean res = FALSE; GstEvent **event_p; GST_DEBUG_OBJECT (aiff, "received event %s", GST_EVENT_TYPE_NAME (event)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEEK: if (aiff->state == AIFF_PARSE_DATA) { /* we can handle the seek directly when streaming data */ res = gst_aiff_parse_perform_seek (aiff, event); } else { GST_DEBUG_OBJECT (aiff, "queuing seek for later"); event_p = &aiff->seek_event; gst_event_replace (event_p, event); /* we always return true */ res = TRUE; } break; default: break; } gst_event_unref (event); return res; } #define MAX_BUFFER_SIZE 4096 static GstFlowReturn gst_aiff_parse_stream_data (GstAiffParse * aiff) { GstBuffer *buf = NULL; GstFlowReturn res = GST_FLOW_OK; guint64 desired, obtained; GstClockTime timestamp, next_timestamp, duration; guint64 pos, nextpos; iterate_adapter: GST_LOG_OBJECT (aiff, "offset: %" G_GINT64_FORMAT " , end: %" G_GINT64_FORMAT " , dataleft: %" G_GINT64_FORMAT, aiff->offset, aiff->end_offset, aiff->dataleft); /* Get the next n bytes and output them */ if (aiff->dataleft == 0 || aiff->dataleft < aiff->bytes_per_sample) goto found_eos; /* scale the amount of data by the segment rate so we get equal * amounts of data regardless of the playback rate */ desired = MIN (gst_guint64_to_gdouble (aiff->dataleft), MAX_BUFFER_SIZE * aiff->segment.abs_rate); if (desired >= aiff->bytes_per_sample && aiff->bytes_per_sample > 0) desired -= (desired % aiff->bytes_per_sample); GST_LOG_OBJECT (aiff, "Fetching %" G_GINT64_FORMAT " bytes of data " "from the sinkpad", desired); if (aiff->streaming) { guint avail = gst_adapter_available (aiff->adapter); if (avail < desired) { GST_LOG_OBJECT (aiff, "Got only %d bytes of data from the sinkpad", avail); return GST_FLOW_OK; } buf = gst_adapter_take_buffer (aiff->adapter, desired); } else { if ((res = gst_pad_pull_range (aiff->sinkpad, aiff->offset, desired, &buf)) != GST_FLOW_OK) goto pull_error; } /* If we have a pending close/start segment, send it now. */ if (G_UNLIKELY (aiff->close_segment != NULL)) { gst_pad_push_event (aiff->srcpad, aiff->close_segment); aiff->close_segment = NULL; } if (G_UNLIKELY (aiff->start_segment != NULL)) { gst_pad_push_event (aiff->srcpad, aiff->start_segment); aiff->start_segment = NULL; } if (G_UNLIKELY (aiff->tags != NULL)) { gst_element_found_tags_for_pad (GST_ELEMENT_CAST (aiff), aiff->srcpad, aiff->tags); aiff->tags = NULL; } obtained = GST_BUFFER_SIZE (buf); /* our positions in bytes */ pos = aiff->offset - aiff->datastart; nextpos = pos + obtained; /* update offsets, does not overflow. */ GST_BUFFER_OFFSET (buf) = pos / aiff->bytes_per_sample; GST_BUFFER_OFFSET_END (buf) = nextpos / aiff->bytes_per_sample; if (aiff->bps > 0) { /* and timestamps if we have a bitrate, be careful for overflows */ timestamp = gst_util_uint64_scale_ceil (pos, GST_SECOND, (guint64) aiff->bps); next_timestamp = gst_util_uint64_scale_ceil (nextpos, GST_SECOND, (guint64) aiff->bps); duration = next_timestamp - timestamp; /* update current running segment position */ gst_segment_set_last_stop (&aiff->segment, GST_FORMAT_TIME, next_timestamp); } else { /* no bitrate, all we know is that the first sample has timestamp 0, all * other positions and durations have unknown timestamp. */ if (pos == 0) timestamp = 0; else timestamp = GST_CLOCK_TIME_NONE; duration = GST_CLOCK_TIME_NONE; /* update current running segment position with byte offset */ gst_segment_set_last_stop (&aiff->segment, GST_FORMAT_BYTES, nextpos); } if (aiff->discont) { GST_DEBUG_OBJECT (aiff, "marking DISCONT"); GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT); aiff->discont = FALSE; } GST_BUFFER_TIMESTAMP (buf) = timestamp; GST_BUFFER_DURATION (buf) = duration; gst_buffer_set_caps (buf, aiff->caps); GST_LOG_OBJECT (aiff, "Got buffer. timestamp:%" GST_TIME_FORMAT " , duration:%" GST_TIME_FORMAT ", size:%u", GST_TIME_ARGS (timestamp), GST_TIME_ARGS (duration), GST_BUFFER_SIZE (buf)); if ((res = gst_pad_push (aiff->srcpad, buf)) != GST_FLOW_OK) goto push_error; if (obtained < aiff->dataleft) { aiff->offset += obtained; aiff->dataleft -= obtained; } else { aiff->offset += aiff->dataleft; aiff->dataleft = 0; } /* Iterate until need more data, so adapter size won't grow */ if (aiff->streaming) { GST_LOG_OBJECT (aiff, "offset: %" G_GINT64_FORMAT " , end: %" G_GINT64_FORMAT, aiff->offset, aiff->end_offset); goto iterate_adapter; } return res; /* ERROR */ found_eos: { GST_DEBUG_OBJECT (aiff, "found EOS"); return GST_FLOW_UNEXPECTED; } pull_error: { /* check if we got EOS */ if (res == GST_FLOW_UNEXPECTED) goto found_eos; GST_WARNING_OBJECT (aiff, "Error getting %" G_GINT64_FORMAT " bytes from the " "sinkpad (dataleft = %" G_GINT64_FORMAT ")", desired, aiff->dataleft); return res; } push_error: { GST_INFO_OBJECT (aiff, "Error pushing on srcpad %s:%s, reason %s, is linked? = %d", GST_DEBUG_PAD_NAME (aiff->srcpad), gst_flow_get_name (res), gst_pad_is_linked (aiff->srcpad)); return res; } } static void gst_aiff_parse_loop (GstPad * pad) { GstFlowReturn ret; GstAiffParse *aiff = GST_AIFF_PARSE (GST_PAD_PARENT (pad)); GST_LOG_OBJECT (aiff, "process data"); switch (aiff->state) { case AIFF_PARSE_START: GST_INFO_OBJECT (aiff, "AIFF_PARSE_START"); if ((ret = gst_aiff_parse_stream_init (aiff)) != GST_FLOW_OK) goto pause; aiff->state = AIFF_PARSE_HEADER; /* fall-through */ case AIFF_PARSE_HEADER: GST_INFO_OBJECT (aiff, "AIFF_PARSE_HEADER"); if ((ret = gst_aiff_parse_stream_headers (aiff)) != GST_FLOW_OK) goto pause; aiff->state = AIFF_PARSE_DATA; GST_INFO_OBJECT (aiff, "AIFF_PARSE_DATA"); /* fall-through */ case AIFF_PARSE_DATA: if ((ret = gst_aiff_parse_stream_data (aiff)) != GST_FLOW_OK) goto pause; break; default: g_assert_not_reached (); } return; /* ERRORS */ pause: { const gchar *reason = gst_flow_get_name (ret); GST_DEBUG_OBJECT (aiff, "pausing task, reason %s", reason); aiff->segment_running = FALSE; gst_pad_pause_task (pad); if (ret == GST_FLOW_UNEXPECTED) { /* perform EOS logic */ if (aiff->segment.flags & GST_SEEK_FLAG_SEGMENT) { GstClockTime stop; if ((stop = aiff->segment.stop) == -1) stop = aiff->segment.duration; gst_element_post_message (GST_ELEMENT_CAST (aiff), gst_message_new_segment_done (GST_OBJECT_CAST (aiff), aiff->segment.format, stop)); } else { gst_pad_push_event (aiff->srcpad, gst_event_new_eos ()); } } else if (ret < GST_FLOW_UNEXPECTED || ret == GST_FLOW_NOT_LINKED) { /* for fatal errors we post an error message, post the error * first so the app knows about the error first. */ GST_ELEMENT_ERROR (aiff, STREAM, FAILED, (_("Internal data flow error.")), ("streaming task paused, reason %s (%d)", reason, ret)); gst_pad_push_event (aiff->srcpad, gst_event_new_eos ()); } return; } } static GstFlowReturn gst_aiff_parse_chain (GstPad * pad, GstBuffer * buf) { GstFlowReturn ret; GstAiffParse *aiff = GST_AIFF_PARSE (GST_PAD_PARENT (pad)); GST_LOG_OBJECT (aiff, "adapter_push %u bytes", GST_BUFFER_SIZE (buf)); gst_adapter_push (aiff->adapter, buf); switch (aiff->state) { case AIFF_PARSE_START: GST_INFO_OBJECT (aiff, "AIFF_PARSE_START"); if ((ret = gst_aiff_parse_parse_stream_init (aiff)) != GST_FLOW_OK) goto done; if (aiff->state != AIFF_PARSE_HEADER) break; /* otherwise fall-through */ case AIFF_PARSE_HEADER: GST_INFO_OBJECT (aiff, "AIFF_PARSE_HEADER"); if ((ret = gst_aiff_parse_stream_headers (aiff)) != GST_FLOW_OK) goto done; if (!aiff->got_comm || aiff->datastart == 0) break; aiff->state = AIFF_PARSE_DATA; GST_INFO_OBJECT (aiff, "AIFF_PARSE_DATA"); /* fall-through */ case AIFF_PARSE_DATA: if ((ret = gst_aiff_parse_stream_data (aiff)) != GST_FLOW_OK) goto done; break; default: g_return_val_if_reached (GST_FLOW_ERROR); } done: return ret; } static gboolean gst_aiff_parse_pad_convert (GstPad * pad, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value) { GstAiffParse *aiffparse; gboolean res = TRUE; aiffparse = GST_AIFF_PARSE (GST_PAD_PARENT (pad)); if (*dest_format == src_format) { *dest_value = src_value; return TRUE; } if (aiffparse->bytes_per_sample <= 0) return FALSE; GST_INFO_OBJECT (aiffparse, "converting value from %s to %s", gst_format_get_name (src_format), gst_format_get_name (*dest_format)); switch (src_format) { case GST_FORMAT_BYTES: switch (*dest_format) { case GST_FORMAT_DEFAULT: *dest_value = src_value / aiffparse->bytes_per_sample; break; case GST_FORMAT_TIME: if (aiffparse->bps > 0) { *dest_value = gst_util_uint64_scale_ceil (src_value, GST_SECOND, (guint64) aiffparse->bps); break; } /* Else fallthrough */ default: res = FALSE; goto done; } break; case GST_FORMAT_DEFAULT: switch (*dest_format) { case GST_FORMAT_BYTES: *dest_value = src_value * aiffparse->bytes_per_sample; break; case GST_FORMAT_TIME: *dest_value = gst_util_uint64_scale (src_value, GST_SECOND, (guint64) aiffparse->rate); break; default: res = FALSE; goto done; } break; case GST_FORMAT_TIME: switch (*dest_format) { case GST_FORMAT_BYTES: if (aiffparse->bps > 0) { *dest_value = gst_util_uint64_scale (src_value, (guint64) aiffparse->bps, GST_SECOND); break; } /* Else fallthrough */ break; case GST_FORMAT_DEFAULT: *dest_value = gst_util_uint64_scale (src_value, (guint64) aiffparse->rate, GST_SECOND); break; default: res = FALSE; goto done; } break; default: res = FALSE; goto done; } done: return res; } static const GstQueryType * gst_aiff_parse_get_query_types (GstPad * pad) { static const GstQueryType types[] = { GST_QUERY_DURATION, GST_QUERY_CONVERT, GST_QUERY_SEEKING, 0 }; return types; } /* handle queries for location and length in requested format */ static gboolean gst_aiff_parse_pad_query (GstPad * pad, GstQuery * query) { gboolean res = TRUE; GstAiffParse *aiff = GST_AIFF_PARSE (gst_pad_get_parent (pad)); /* only if we know */ if (aiff->state != AIFF_PARSE_DATA) { gst_object_unref (aiff); return FALSE; } switch (GST_QUERY_TYPE (query)) { case GST_QUERY_DURATION: { gint64 duration = 0; GstFormat format; gst_query_parse_duration (query, &format, NULL); switch (format) { case GST_FORMAT_TIME:{ if ((res = gst_aiff_parse_calculate_duration (aiff))) { duration = aiff->duration; } break; } default: format = GST_FORMAT_BYTES; duration = aiff->datasize; break; } gst_query_set_duration (query, format, duration); break; } case GST_QUERY_CONVERT: { gint64 srcvalue, dstvalue; GstFormat srcformat, dstformat; gst_query_parse_convert (query, &srcformat, &srcvalue, &dstformat, &dstvalue); res = gst_aiff_parse_pad_convert (pad, srcformat, srcvalue, &dstformat, &dstvalue); if (res) gst_query_set_convert (query, srcformat, srcvalue, dstformat, dstvalue); break; } case GST_QUERY_SEEKING:{ GstFormat fmt; gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL); if (fmt == GST_FORMAT_TIME) { gboolean seekable = TRUE; if (!gst_aiff_parse_calculate_duration (aiff)) { seekable = FALSE; } gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, aiff->duration); res = TRUE; } break; } default: res = gst_pad_query_default (pad, query); break; } gst_object_unref (aiff); return res; } static gboolean gst_aiff_parse_srcpad_event (GstPad * pad, GstEvent * event) { GstAiffParse *aiffparse = GST_AIFF_PARSE (gst_pad_get_parent (pad)); gboolean res = FALSE; GST_DEBUG_OBJECT (aiffparse, "%s event", GST_EVENT_TYPE_NAME (event)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEEK: /* can only handle events when we are in the data state */ if (aiffparse->state == AIFF_PARSE_DATA) { res = gst_aiff_parse_perform_seek (aiffparse, event); } gst_event_unref (event); break; default: res = gst_pad_push_event (aiffparse->sinkpad, event); break; } gst_object_unref (aiffparse); return res; } static gboolean gst_aiff_parse_sink_activate (GstPad * sinkpad) { GstAiffParse *aiff = GST_AIFF_PARSE (gst_pad_get_parent (sinkpad)); gboolean res; if (aiff->adapter) g_object_unref (aiff->adapter); if (gst_pad_check_pull_range (sinkpad)) { GST_DEBUG ("going to pull mode"); aiff->streaming = FALSE; aiff->adapter = NULL; res = gst_pad_activate_pull (sinkpad, TRUE); } else { GST_DEBUG ("going to push (streaming) mode"); aiff->streaming = TRUE; aiff->adapter = gst_adapter_new (); res = gst_pad_activate_push (sinkpad, TRUE); } gst_object_unref (aiff); return res; } static gboolean gst_aiff_parse_sink_activate_pull (GstPad * sinkpad, gboolean active) { GstAiffParse *aiff = GST_AIFF_PARSE (GST_OBJECT_PARENT (sinkpad)); if (active) { aiff->segment_running = TRUE; return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_aiff_parse_loop, sinkpad); } else { aiff->segment_running = FALSE; return gst_pad_stop_task (sinkpad); } }; static GstStateChangeReturn gst_aiff_parse_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret; GstAiffParse *aiff = GST_AIFF_PARSE (element); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: break; case GST_STATE_CHANGE_READY_TO_PAUSED: gst_aiff_parse_reset (aiff); break; case GST_STATE_CHANGE_PAUSED_TO_PLAYING: break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PLAYING_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_READY: gst_aiff_parse_reset (aiff); break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; }