diff options
Diffstat (limited to 'gst')
| -rw-r--r-- | gst/aiffparse/Makefile.am | 14 | ||||
| -rw-r--r-- | gst/aiffparse/aiffparse.c | 1549 | ||||
| -rw-r--r-- | gst/aiffparse/aiffparse.h | 122 |
3 files changed, 1685 insertions, 0 deletions
diff --git a/gst/aiffparse/Makefile.am b/gst/aiffparse/Makefile.am new file mode 100644 index 00000000..ca3e212b --- /dev/null +++ b/gst/aiffparse/Makefile.am @@ -0,0 +1,14 @@ +plugin_LTLIBRARIES = libgstaiffparse.la + +libgstaiffparse_la_SOURCES = aiffparse.c +libgstaiffparse_la_CFLAGS = \ + $(GST_BASE_CFLAGS) \ + $(GST_PLUGINS_BASE_CFLAGS) \ + $(GST_CFLAGS) +libgstaiffparse_la_LIBADD = \ + $(GST_PLUGINS_BASE_LIBS) \ + $(GST_BASE_LIBS) \ + $(LIBM) +libgstaiffparse_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) + +noinst_HEADERS = aiffparse.h diff --git a/gst/aiffparse/aiffparse.c b/gst/aiffparse/aiffparse.c new file mode 100644 index 00000000..7616109a --- /dev/null +++ b/gst/aiffparse/aiffparse.c @@ -0,0 +1,1549 @@ +/* -*- Mode: C; tab-width: 2; indent-tabs-mode: t; c-basic-offset: 2 -*- */ +/* GStreamer + * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> + * <2006> Nokia Corporation, Stefan Kost <stefan.kost@nokia.com>. + * <2008> Pioneers of the Inevitable <songbird@songbirdnest.com> + * + * + * 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 + * + * <refsect2> + * <para> + * Parse a .aiff file into raw or compressed audio. + * </para> + * <para> + * AIFFparse supports both push and pull mode operations, making it possible to + * stream from a network source. + * </para> + * <title>Example launch line</title> + * <para> + * <programlisting> + * gst-launch filesrc location=sine.aiff ! aiffparse ! audioconvert ! alsasink + * </programlisting> + * Read a aiff file and output to the soundcard using the ALSA element. The + * aiff file is assumed to contain raw uncompressed samples. + * </para> + * <para> + * <programlisting> + * gst-launch gnomevfssrc location=http://www.example.org/sine.aiff ! queue ! aiffparse ! audioconvert ! alsasink + * </programlisting> + * Stream data from a network url. + * </para> + * </refsect2> + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif +#include <string.h> +#include <math.h> + +#include "aiffparse.h" +#include "gst/audio/audio.h" +#include <gst/gst-i18n-plugin.h> + +GST_DEBUG_CATEGORY_STATIC (aiffparse_debug); +#define GST_CAT_DEFAULT (aiffparse_debug) + +static void gst_aiffparse_dispose (GObject * object); + +static gboolean gst_aiffparse_sink_activate (GstPad * sinkpad); +static gboolean gst_aiffparse_sink_activate_pull (GstPad * sinkpad, + gboolean active); +static gboolean gst_aiffparse_send_event (GstElement * element, + GstEvent * event); +static GstStateChangeReturn gst_aiffparse_change_state (GstElement * element, + GstStateChange transition); + +static const GstQueryType *gst_aiffparse_get_query_types (GstPad * pad); +static gboolean gst_aiffparse_pad_query (GstPad * pad, GstQuery * query); +static gboolean gst_aiffparse_pad_convert (GstPad * pad, + GstFormat src_format, + gint64 src_value, GstFormat * dest_format, gint64 * dest_value); + +static GstFlowReturn gst_aiffparse_chain (GstPad * pad, GstBuffer * buf); +static void gst_aiffparse_loop (GstPad * pad); +static gboolean gst_aiffparse_srcpad_event (GstPad * pad, GstEvent * event); + +static const GstElementDetails gst_aiffparse_details = +GST_ELEMENT_DETAILS ("AIFF audio demuxer", + "Codec/Demuxer/Audio", + "Parse a .aiff file into raw audio", + "Pioneers of the Inevitable <songbird@songbirdnest.com>"); + +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) + ); + +#define DEBUG_INIT(bla) \ + GST_DEBUG_CATEGORY_INIT (aiffparse_debug, "aiffparse", 0, "AIFF parser"); + +GST_BOILERPLATE_FULL (AIFFParse, gst_aiffparse, GstElement, + GST_TYPE_ELEMENT, DEBUG_INIT); + +static void +gst_aiffparse_base_init (gpointer g_class) +{ + GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); + /* register pads */ + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&sink_template_factory)); + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&src_template_factory)); + + gst_element_class_set_details (element_class, &gst_aiffparse_details); +} + +static void +gst_aiffparse_class_init (AIFFParseClass * 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_aiffparse_dispose; + + gstelement_class->change_state = gst_aiffparse_change_state; + gstelement_class->send_event = gst_aiffparse_send_event; +} + +static void +gst_aiffparse_reset (AIFFParse * aiff) +{ + aiff->state = AIFFPARSE_START; + + /* These will all be set correctly in the fmt chunk */ + aiff->rate = 0; + aiff->width = 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; + } +} + +static void +gst_aiffparse_dispose (GObject * object) +{ + AIFFParse *aiff = AIFFPARSE (object); + + GST_DEBUG_OBJECT (aiff, "AIFF: Dispose"); + gst_aiffparse_reset (aiff); + + G_OBJECT_CLASS (parent_class)->dispose (object); +} + +static void +gst_aiffparse_init (AIFFParse * aiffparse, AIFFParseClass * g_class) +{ + gst_aiffparse_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_aiffparse_sink_activate)); + gst_pad_set_activatepull_function (aiffparse->sinkpad, + GST_DEBUG_FUNCPTR (gst_aiffparse_sink_activate_pull)); + gst_pad_set_chain_function (aiffparse->sinkpad, + GST_DEBUG_FUNCPTR (gst_aiffparse_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_aiffparse_get_query_types)); + gst_pad_set_query_function (aiffparse->srcpad, + GST_DEBUG_FUNCPTR (gst_aiffparse_pad_query)); + gst_pad_set_event_function (aiffparse->srcpad, + GST_DEBUG_FUNCPTR (gst_aiffparse_srcpad_event)); + gst_element_add_pad (GST_ELEMENT_CAST (aiffparse), aiffparse->srcpad); +} + +/* Compute (value * nom) % denom, avoiding overflow. This can be used + * to perform ceiling or rounding division together with + * gst_util_uint64_scale[_int]. */ +#define uint64_scale_modulo(val, nom, denom) \ + ((val % denom) * (nom % denom) % denom) + +/* Like gst_util_uint64_scale, but performs ceiling division. */ +static guint64 +uint64_ceiling_scale (guint64 val, guint64 num, guint64 denom) +{ + guint64 result = gst_util_uint64_scale_int (val, num, denom); + + if (uint64_scale_modulo (val, num, denom) == 0) + return result; + else + return result + 1; +} + + +static gboolean +gst_aiffparse_parse_file_header (AIFFParse * 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_aiffparse_stream_init (AIFFParse * 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_aiffparse_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_aiffparse_perform_seek (AIFFParse * 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 = + uint64_ceiling_scale (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 = + uint64_ceiling_scale (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_aiffparse_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_aiffparse_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_aiffparse_peek_chunk_info (AIFFParse * 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_aiffparse_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_aiffparse_peek_chunk (AIFFParse * aiff, guint32 * tag, guint32 * size) +{ + guint32 peek_size = 0; + guint available; + + if (!gst_aiffparse_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; + } +} + +/* + * gst_aiffparse_calculate_duration: + * @aiff: aiffparse object + * + * Calculate duration on demand and store in @aiff. + * + * Returns: %TRUE if duration is available. + */ +static gboolean +gst_aiffparse_calculate_duration (AIFFParse * aiff) +{ + if (aiff->duration > 0) + return TRUE; + + if (aiff->datasize > 0 && aiff->bps > 0) { + aiff->duration = + uint64_ceiling_scale (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_aiffparse_ignore_chunk (AIFFParse * aiff, GstBuffer * buf, guint32 tag, + guint32 size) +{ + guint flush; + + if (aiff->streaming) { + if (!gst_aiffparse_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_aiffparse_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_aiffparse_parse_comm (AIFFParse * 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->width = GST_READ_UINT16_BE (data + 6); + aiff->rate = (int) gst_aiffparse_read_IEEE80 (data + 8); + + if (aiff->is_aifc) { + /* We only support the 'trivial' uncompressed AIFC, but it can be + * either big or little endian */ + if (GST_READ_UINT32_LE (data + 18) == GST_MAKE_FOURCC ('N', 'O', 'N', 'E')) + aiff->endianness = G_BIG_ENDIAN; + else if (GST_READ_UINT32_LE (data + 18) == GST_MAKE_FOURCC ('s', 'o', 'w', + 't')) + aiff->endianness = G_LITTLE_ENDIAN; + } else + aiff->endianness = G_BIG_ENDIAN; + + return TRUE; +} + +static GstFlowReturn +gst_aiffparse_read_chunk (AIFFParse * 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_aiffparse_create_caps (AIFFParse * aiff) +{ + GstCaps *caps; + + caps = gst_caps_new_simple ("audio/x-raw-int", + "width", G_TYPE_INT, aiff->width, + "depth", G_TYPE_INT, aiff->width, + "channels", G_TYPE_INT, aiff->channels, + "endianness", G_TYPE_INT, aiff->endianness, + "rate", G_TYPE_INT, aiff->rate, + "signed", G_TYPE_BOOLEAN, aiff->width != 8, NULL); + + GST_DEBUG_OBJECT (aiff, "Created caps: %" GST_PTR_FORMAT, caps); + return caps; +} + +static GstFlowReturn +gst_aiffparse_stream_headers (AIFFParse * aiff) +{ + GstFlowReturn res; + GstBuffer *buf; + guint32 tag, size; + gboolean gotdata = FALSE; + GstEvent **event_p; + GstFormat bformat; + gint64 upstream_size = 0; + + /* search for "comm" chunk, which should be first */ + while (!aiff->got_comm) { + /* The header starts with a 'comm' tag */ + if (aiff->streaming) { + if (!gst_aiffparse_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_aiffparse_read_chunk (aiff, + &aiff->offset, &tag, &buf)) != GST_FLOW_OK) + return res; + } + + /* TODO: allow some non-COMM chunks here */ + + if (tag != GST_MAKE_FOURCC ('C', 'O', 'M', 'M')) { + gst_buffer_unref (buf); + goto invalid_aiff; + } + + if (!gst_aiffparse_parse_comm (aiff, buf)) { + gst_buffer_unref (buf); + goto parse_header_error; + } + + /* 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_aiffparse_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; + } + + 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 (!gotdata) { + if (aiff->streaming) { + if (!gst_aiffparse_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_LE (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 ('S', 'S', 'N', 'D'):{ + GstFormat fmt; + + GST_DEBUG_OBJECT (aiff, "Got 'SSND' TAG, size : %d", size); + if (aiff->streaming) { + gst_adapter_flush (aiff->adapter, 8); + gotdata = TRUE; + } else { + gst_buffer_unref (buf); + } + aiff->offset += 8; + aiff->datastart = aiff->offset; + /* file might be truncated */ + fmt = GST_FORMAT_BYTES; + if (upstream_size) { + size = MIN (size, (upstream_size - aiff->datastart)); + } + aiff->datasize = (guint64) size; + aiff->dataleft = (guint64) size; + aiff->end_offset = size + aiff->datastart; + if (!aiff->streaming) { + /* We will continue looking at chunks until the end - to read tags, + * etc. */ + aiff->offset += size; + } + GST_DEBUG_OBJECT (aiff, "datasize = %d", size); + break; + } + default: + gst_aiffparse_ignore_chunk (aiff, buf, tag, size); + } + + if (upstream_size && (aiff->offset >= upstream_size)) { + /* Now we have gone through the whole file */ + gotdata = TRUE; + } + } + + GST_DEBUG_OBJECT (aiff, "Finished parsing headers"); + + if (gst_aiffparse_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_aiffparse_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 = AIFFPARSE_DATA; + + return GST_FLOW_OK; + + /* ERROR */ +invalid_aiff: + { + GST_ELEMENT_ERROR (aiff, STREAM, TYPE_NOT_FOUND, (NULL), + ("Invalid AIFF header (no COMM at start): %" + GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag))); + 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_aiffparse_parse_stream_init (AIFFParse * 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_aiffparse_parse_file_header (aiff, tmp)) + return GST_FLOW_ERROR; + + aiff->offset += 12; + /* Go to next state */ + aiff->state = AIFFPARSE_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 != AIFFPARSE_DATA. + * + * When we are steaming, we can simply perform the seek right + * away. + */ +static gboolean +gst_aiffparse_send_event (GstElement * element, GstEvent * event) +{ + AIFFParse *aiff = AIFFPARSE (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 == AIFFPARSE_DATA) { + /* we can handle the seek directly when streaming data */ + res = gst_aiffparse_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_aiffparse_stream_data (AIFFParse * 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; + } + + 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 = uint64_ceiling_scale (pos, GST_SECOND, (guint64) aiff->bps); + next_timestamp = + uint64_ceiling_scale (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_aiffparse_loop (GstPad * pad) +{ + GstFlowReturn ret; + AIFFParse *aiff = AIFFPARSE (GST_PAD_PARENT (pad)); + + GST_LOG_OBJECT (aiff, "process data"); + + switch (aiff->state) { + case AIFFPARSE_START: + GST_INFO_OBJECT (aiff, "AIFFPARSE_START"); + if ((ret = gst_aiffparse_stream_init (aiff)) != GST_FLOW_OK) + goto pause; + + aiff->state = AIFFPARSE_HEADER; + /* fall-through */ + + case AIFFPARSE_HEADER: + GST_INFO_OBJECT (aiff, "AIFFPARSE_HEADER"); + if ((ret = gst_aiffparse_stream_headers (aiff)) != GST_FLOW_OK) + goto pause; + + aiff->state = AIFFPARSE_DATA; + GST_INFO_OBJECT (aiff, "AIFFPARSE_DATA"); + /* fall-through */ + + case AIFFPARSE_DATA: + if ((ret = gst_aiffparse_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 (GST_FLOW_IS_FATAL (ret) || ret == GST_FLOW_NOT_LINKED) { + 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 { + /* 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_aiffparse_chain (GstPad * pad, GstBuffer * buf) +{ + GstFlowReturn ret; + AIFFParse *aiff = AIFFPARSE (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 AIFFPARSE_START: + GST_INFO_OBJECT (aiff, "AIFFPARSE_START"); + if ((ret = gst_aiffparse_parse_stream_init (aiff)) != GST_FLOW_OK) + goto done; + + if (aiff->state != AIFFPARSE_HEADER) + break; + + /* otherwise fall-through */ + case AIFFPARSE_HEADER: + GST_INFO_OBJECT (aiff, "AIFFPARSE_HEADER"); + if ((ret = gst_aiffparse_stream_headers (aiff)) != GST_FLOW_OK) + goto done; + + if (!aiff->got_comm || aiff->datastart == 0) + break; + + aiff->state = AIFFPARSE_DATA; + GST_INFO_OBJECT (aiff, "AIFFPARSE_DATA"); + + /* fall-through */ + case AIFFPARSE_DATA: + if ((ret = gst_aiffparse_stream_data (aiff)) != GST_FLOW_OK) + goto done; + break; + default: + g_return_val_if_reached (GST_FLOW_ERROR); + } +done: + return ret; +} + +static gboolean +gst_aiffparse_pad_convert (GstPad * pad, + GstFormat src_format, gint64 src_value, + GstFormat * dest_format, gint64 * dest_value) +{ + AIFFParse *aiffparse; + gboolean res = TRUE; + + aiffparse = AIFFPARSE (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 = uint64_ceiling_scale (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_aiffparse_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_aiffparse_pad_query (GstPad * pad, GstQuery * query) +{ + gboolean res = TRUE; + AIFFParse *aiff = AIFFPARSE (gst_pad_get_parent (pad)); + + /* only if we know */ + if (aiff->state != AIFFPARSE_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_aiffparse_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_aiffparse_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_aiffparse_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_aiffparse_srcpad_event (GstPad * pad, GstEvent * event) +{ + AIFFParse *aiffparse = AIFFPARSE (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 == AIFFPARSE_DATA) { + res = gst_aiffparse_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_aiffparse_sink_activate (GstPad * sinkpad) +{ + AIFFParse *aiff = AIFFPARSE (gst_pad_get_parent (sinkpad)); + gboolean res; + + if (aiff->adapter) + gst_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_aiffparse_sink_activate_pull (GstPad * sinkpad, gboolean active) +{ + AIFFParse *aiff = AIFFPARSE (GST_OBJECT_PARENT (sinkpad)); + + if (active) { + aiff->segment_running = TRUE; + return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_aiffparse_loop, + sinkpad); + } else { + aiff->segment_running = FALSE; + return gst_pad_stop_task (sinkpad); + } +}; + +static GstStateChangeReturn +gst_aiffparse_change_state (GstElement * element, GstStateChange transition) +{ + GstStateChangeReturn ret; + AIFFParse *aiff = AIFFPARSE (element); + + switch (transition) { + case GST_STATE_CHANGE_NULL_TO_READY: + break; + case GST_STATE_CHANGE_READY_TO_PAUSED: + gst_aiffparse_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_aiffparse_reset (aiff); + break; + case GST_STATE_CHANGE_READY_TO_NULL: + break; + default: + break; + } + return ret; +} + +static gboolean +plugin_init (GstPlugin * plugin) +{ + return gst_element_register (plugin, "aiffparse", GST_RANK_PRIMARY, + TYPE_AIFFPARSE); +} + +GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, + GST_VERSION_MINOR, + "aiffparse", + "Parse an .aiff file into raw audio", + plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN) diff --git a/gst/aiffparse/aiffparse.h b/gst/aiffparse/aiffparse.h new file mode 100644 index 00000000..5499a9b6 --- /dev/null +++ b/gst/aiffparse/aiffparse.h @@ -0,0 +1,122 @@ +/* GStreamer + * Copyright (C) <2008> Pioneers of the Inevitable <songbird@songbirdnest.com> + * + * 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. + */ + + +#ifndef __GST_AIFFPARSE_H__ +#define __GST_AIFFPARSE_H__ + + +#include <gst/gst.h> +#include "gst/riff/riff-ids.h" +#include "gst/riff/riff-read.h" +#include <gst/base/gstadapter.h> + +G_BEGIN_DECLS + +#define TYPE_AIFFPARSE \ + (gst_aiffparse_get_type()) +#define AIFFPARSE(obj) \ + (G_TYPE_CHECK_INSTANCE_CAST((obj),TYPE_AIFFPARSE,AIFFParse)) +#define AIFFPARSE_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_CAST((klass),TYPE_AIFFPARSE,AIFFParseClass)) +#define IS_AIFFPARSE(obj) \ + (G_TYPE_CHECK_INSTANCE_TYPE((obj),TYPE_AIFFPARSE)) +#define IS_AIFFPARSE_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_TYPE((klass),TYPE_AIFFPARSE)) + +typedef enum { + AIFFPARSE_START, + AIFFPARSE_HEADER, + AIFFPARSE_DATA +} AIFFParseState; + +typedef struct _AIFFParse AIFFParse; +typedef struct _AIFFParseClass AIFFParseClass; + +/** + * AIFFParse: + * + * Opaque data structure. + */ +struct _AIFFParse { + GstElement parent; + + /* pads */ + GstPad *sinkpad,*srcpad; + + GstCaps *caps; + GstEvent *close_segment; + GstEvent *start_segment; + + /* AIFF decoding state */ + AIFFParseState state; + + /* format of audio, see defines below */ + gint format; + + gboolean is_aifc; + + /* useful audio data */ + guint32 rate; + guint16 channels; + guint16 width; + guint32 endianness; + + /* real bytes per second used or 0 when no bitrate is known */ + guint32 bps; + + guint bytes_per_sample; + + guint32 total_frames; + + /* position in data part */ + guint64 offset; + guint64 end_offset; + guint64 dataleft; + /* offset/length of data part */ + guint64 datastart; + guint64 datasize; + /* duration in time */ + guint64 duration; + + /* pending seek */ + GstEvent *seek_event; + + /* For streaming */ + GstAdapter *adapter; + gboolean got_comm; + gboolean streaming; + + /* configured segment, start/stop expressed in time */ + GstSegment segment; + gboolean segment_running; + + /* discont after seek */ + gboolean discont; +}; + +struct _AIFFParseClass { + GstElementClass parent_class; +}; + +GType aiffparse_get_type(void); + +G_END_DECLS + +#endif /* __GST_AIFFPARSE_H__ */ |