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gstreamer/gst/aiff/aiffparse.c
Sebastian Dröge f2affc667f aiffparse: Don't use GST_FLOW_IS_FATAL()
2010-09-21 12:25:53 +02:00

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/* -*- Mode: C; tab-width: 2; indent-tabs-mode: t; c-basic-offset: 2 -*- */
/* GStreamer AIFF parser
* 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 (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_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_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_simple (element_class,
"AIFF audio demuxer", "Codec/Demuxer/Audio",
"Parse a .aiff file into raw audio",
"Pioneers of the Inevitable <songbird@songbirdnest.com>");
}
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;
}
}
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);
}
/* 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_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 =
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_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 =
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_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);
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 {
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;
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'):{
GstFormat fmt;
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, 16 byte SSND header */
aiff->offset += 24;
datasize = size - 16;
aiff->datastart = aiff->offset + aiff->ssnd_offset;
/* file might be truncated */
fmt = GST_FORMAT_BYTES;
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;
}
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;
}
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_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 = 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_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;
}
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