blob: 5479350cdde7f8ada6333d32835dafa510ee74cb [file] [log] [blame]
/* GStreamer TTA plugin
* (c) 2004 Arwed v. Merkatz <v.merkatz@gmx.net>
*
* gstttaparse.c: TTA file parser
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex
* with newer GLib versions (>= 2.31.0) */
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#include <gst/gst.h>
#include <math.h>
#include "gstttaparse.h"
#include "ttadec.h"
#include "crc32.h"
GST_DEBUG_CATEGORY_STATIC (gst_tta_parse_debug);
#define GST_CAT_DEFAULT gst_tta_parse_debug
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-ttafile")
);
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-tta, "
"width = (int) { 8, 16, 24 }, "
"channels = (int) { 1, 2 }, " "rate = (int) [ 8000, 96000 ]")
);
static void gst_tta_parse_class_init (GstTtaParseClass * klass);
static void gst_tta_parse_base_init (GstTtaParseClass * klass);
static void gst_tta_parse_init (GstTtaParse * ttaparse);
static gboolean gst_tta_parse_src_event (GstPad * pad, GstEvent * event);
static const GstQueryType *gst_tta_parse_get_query_types (GstPad * pad);
static gboolean gst_tta_parse_query (GstPad * pad, GstQuery * query);
static gboolean gst_tta_parse_activate (GstPad * pad);
static gboolean gst_tta_parse_activate_pull (GstPad * pad, gboolean active);
static void gst_tta_parse_loop (GstTtaParse * ttaparse);
static GstStateChangeReturn gst_tta_parse_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class = NULL;
GType
gst_tta_parse_get_type (void)
{
static GType plugin_type = 0;
if (!plugin_type) {
static const GTypeInfo plugin_info = {
sizeof (GstTtaParseClass),
(GBaseInitFunc) gst_tta_parse_base_init,
NULL,
(GClassInitFunc) gst_tta_parse_class_init,
NULL,
NULL,
sizeof (GstTtaParse),
0,
(GInstanceInitFunc) gst_tta_parse_init,
};
plugin_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstTtaParse", &plugin_info, 0);
}
return plugin_type;
}
static void
gst_tta_parse_base_init (GstTtaParseClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_static_pad_template (element_class, &src_factory);
gst_element_class_add_static_pad_template (element_class, &sink_factory);
gst_element_class_set_static_metadata (element_class, "TTA file parser",
"Codec/Demuxer/Audio",
"Parses TTA files", "Arwed v. Merkatz <v.merkatz@gmx.net>");
}
static void
gst_tta_parse_dispose (GObject * object)
{
GstTtaParse *ttaparse = GST_TTA_PARSE (object);
g_free (ttaparse->index);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_tta_parse_class_init (GstTtaParseClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->dispose = gst_tta_parse_dispose;
gstelement_class->change_state = gst_tta_parse_change_state;
}
static void
gst_tta_parse_reset (GstTtaParse * ttaparse)
{
ttaparse->header_parsed = FALSE;
ttaparse->current_frame = 0;
ttaparse->data_length = 0;
ttaparse->samplerate = 0;
}
static void
gst_tta_parse_init (GstTtaParse * ttaparse)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (ttaparse);
ttaparse->sinkpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"sink"), "sink");
ttaparse->srcpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"src"), "src");
gst_pad_use_fixed_caps (ttaparse->srcpad);
gst_pad_set_query_type_function (ttaparse->srcpad,
gst_tta_parse_get_query_types);
gst_pad_set_query_function (ttaparse->srcpad, gst_tta_parse_query);
gst_pad_set_event_function (ttaparse->srcpad, gst_tta_parse_src_event);
gst_element_add_pad (GST_ELEMENT (ttaparse), ttaparse->sinkpad);
gst_element_add_pad (GST_ELEMENT (ttaparse), ttaparse->srcpad);
gst_pad_set_activate_function (ttaparse->sinkpad, gst_tta_parse_activate);
gst_pad_set_activatepull_function (ttaparse->sinkpad,
gst_tta_parse_activate_pull);
gst_tta_parse_reset (ttaparse);
}
static gboolean
gst_tta_parse_src_event (GstPad * pad, GstEvent * event)
{
GstTtaParse *ttaparse = GST_TTA_PARSE (GST_PAD_PARENT (pad));
gboolean res = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
gst_event_parse_seek (event, &rate, &format, &flags,
&start_type, &start, &stop_type, &stop);
if (format == GST_FORMAT_TIME) {
if (flags & GST_SEEK_FLAG_FLUSH) {
gst_pad_push_event (ttaparse->srcpad, gst_event_new_flush_start ());
gst_pad_push_event (ttaparse->sinkpad, gst_event_new_flush_start ());
} else {
gst_pad_pause_task (ttaparse->sinkpad);
}
GST_PAD_STREAM_LOCK (ttaparse->sinkpad);
switch (start_type) {
case GST_SEEK_TYPE_CUR:
ttaparse->current_frame += (start / GST_SECOND) / FRAME_TIME;
break;
case GST_SEEK_TYPE_END:
ttaparse->current_frame += (start / GST_SECOND) / FRAME_TIME;
break;
case GST_SEEK_TYPE_SET:
ttaparse->current_frame = (start / GST_SECOND) / FRAME_TIME;
break;
case GST_SEEK_TYPE_NONE:
break;
}
res = TRUE;
if (flags & GST_SEEK_FLAG_FLUSH) {
gst_pad_push_event (ttaparse->srcpad, gst_event_new_flush_stop ());
gst_pad_push_event (ttaparse->sinkpad, gst_event_new_flush_stop ());
}
gst_pad_push_event (ttaparse->srcpad, gst_event_new_new_segment (FALSE,
1.0, GST_FORMAT_TIME, 0,
ttaparse->num_frames * FRAME_TIME * GST_SECOND, 0));
gst_pad_start_task (ttaparse->sinkpad,
(GstTaskFunction) gst_tta_parse_loop, ttaparse, NULL);
GST_PAD_STREAM_UNLOCK (ttaparse->sinkpad);
} else {
res = FALSE;
}
gst_event_unref (event);
break;
}
default:
res = gst_pad_event_default (pad, event);
break;
}
return res;
}
static const GstQueryType *
gst_tta_parse_get_query_types (GstPad * pad)
{
static const GstQueryType types[] = {
GST_QUERY_POSITION,
GST_QUERY_DURATION,
0
};
return types;
}
static gboolean
gst_tta_parse_query (GstPad * pad, GstQuery * query)
{
GstTtaParse *ttaparse = GST_TTA_PARSE (gst_pad_get_parent (pad));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
{
GstFormat format;
gint64 cur;
gst_query_parse_position (query, &format, NULL);
switch (format) {
case GST_FORMAT_TIME:
cur = ttaparse->index[ttaparse->current_frame].time;
break;
default:
format = GST_FORMAT_BYTES;
cur = ttaparse->index[ttaparse->current_frame].pos;
break;
}
gst_query_set_position (query, format, cur);
break;
}
case GST_QUERY_DURATION:
{
GstFormat format;
gint64 end;
gst_query_parse_duration (query, &format, NULL);
switch (format) {
case GST_FORMAT_TIME:
end = ((gdouble) ttaparse->data_length /
(gdouble) ttaparse->samplerate) * GST_SECOND;
break;
default:
format = GST_FORMAT_BYTES;
end = ttaparse->index[ttaparse->num_frames].pos +
ttaparse->index[ttaparse->num_frames].size;
break;
}
gst_query_set_duration (query, format, end);
break;
}
default:
return FALSE;
break;
}
return TRUE;
}
static gboolean
gst_tta_parse_activate (GstPad * pad)
{
if (gst_pad_check_pull_range (pad)) {
return gst_pad_activate_pull (pad, TRUE);
}
return FALSE;
}
static gboolean
gst_tta_parse_activate_pull (GstPad * pad, gboolean active)
{
GstTtaParse *ttaparse = GST_TTA_PARSE (GST_OBJECT_PARENT (pad));
if (active) {
gst_pad_start_task (pad, (GstTaskFunction) gst_tta_parse_loop, ttaparse,
NULL);
} else {
gst_pad_stop_task (pad);
}
return TRUE;
}
static GstFlowReturn
gst_tta_parse_parse_header (GstTtaParse * ttaparse)
{
guchar *data;
GstBuffer *buf = NULL;
guint32 crc;
double frame_length;
int num_frames;
GstCaps *caps;
int i;
guint32 offset;
GstEvent *discont;
if (gst_pad_pull_range (ttaparse->sinkpad, 0, 22, &buf) != GST_FLOW_OK)
goto pull_fail;
data = GST_BUFFER_DATA (buf);
ttaparse->channels = GST_READ_UINT16_LE (data + 6);
ttaparse->bits = GST_READ_UINT16_LE (data + 8);
ttaparse->samplerate = GST_READ_UINT32_LE (data + 10);
ttaparse->data_length = GST_READ_UINT32_LE (data + 14);
crc = crc32 (data, 18);
if (crc != GST_READ_UINT32_LE (data + 18)) {
GST_DEBUG ("Header CRC wrong!");
}
frame_length = FRAME_TIME * ttaparse->samplerate;
num_frames = (ttaparse->data_length / frame_length) + 1;
ttaparse->num_frames = num_frames;
gst_buffer_unref (buf);
ttaparse->index =
(GstTtaIndex *) g_malloc (num_frames * sizeof (GstTtaIndex));
if (gst_pad_pull_range (ttaparse->sinkpad,
22, num_frames * 4 + 4, &buf) != GST_FLOW_OK)
goto pull_fail;
data = GST_BUFFER_DATA (buf);
offset = 22 + num_frames * 4 + 4; // header size + seektable size
for (i = 0; i < num_frames; i++) {
ttaparse->index[i].size = GST_READ_UINT32_LE (data + i * 4);
ttaparse->index[i].pos = offset;
offset += ttaparse->index[i].size;
ttaparse->index[i].time = i * FRAME_TIME * GST_SECOND;
}
crc = crc32 (data, num_frames * 4);
if (crc != GST_READ_UINT32_LE (data + num_frames * 4)) {
GST_DEBUG ("Seektable CRC wrong!");
}
GST_DEBUG
("channels: %u, bits: %u, samplerate: %u, data_length: %u, num_frames: %u",
ttaparse->channels, ttaparse->bits, ttaparse->samplerate,
ttaparse->data_length, num_frames);
ttaparse->header_parsed = TRUE;
caps = gst_caps_new_simple ("audio/x-tta",
"width", G_TYPE_INT, ttaparse->bits,
"channels", G_TYPE_INT, ttaparse->channels,
"rate", G_TYPE_INT, ttaparse->samplerate, NULL);
gst_pad_set_caps (ttaparse->srcpad, caps);
discont =
gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, 0,
num_frames * FRAME_TIME * GST_SECOND, 0);
gst_pad_push_event (ttaparse->srcpad, discont);
return GST_FLOW_OK;
pull_fail:
{
GST_ELEMENT_ERROR (ttaparse, STREAM, DEMUX, (NULL),
("Couldn't read header"));
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_tta_parse_stream_data (GstTtaParse * ttaparse)
{
GstBuffer *buf = NULL;
GstFlowReturn res = GST_FLOW_OK;
if (ttaparse->current_frame >= ttaparse->num_frames)
goto found_eos;
GST_DEBUG ("playing frame %u of %u", ttaparse->current_frame + 1,
ttaparse->num_frames);
if ((res = gst_pad_pull_range (ttaparse->sinkpad,
ttaparse->index[ttaparse->current_frame].pos,
ttaparse->index[ttaparse->current_frame].size,
&buf)) != GST_FLOW_OK)
goto pull_error;
GST_BUFFER_OFFSET (buf) = ttaparse->index[ttaparse->current_frame].pos;
GST_BUFFER_TIMESTAMP (buf) = ttaparse->index[ttaparse->current_frame].time;
if (ttaparse->current_frame + 1 == ttaparse->num_frames) {
guint32 samples =
ttaparse->data_length % (gint64) (ttaparse->samplerate * FRAME_TIME);
gdouble frametime = (gdouble) samples / (gdouble) ttaparse->samplerate;
GST_BUFFER_DURATION (buf) = (guint64) (frametime * GST_SECOND);
} else {
GST_BUFFER_DURATION (buf) = FRAME_TIME * GST_SECOND;
}
gst_buffer_set_caps (buf, GST_PAD_CAPS (ttaparse->srcpad));
if ((res = gst_pad_push (ttaparse->srcpad, buf)) != GST_FLOW_OK)
goto push_error;
ttaparse->current_frame++;
return res;
found_eos:
{
GST_DEBUG ("found EOS");
gst_pad_push_event (ttaparse->srcpad, gst_event_new_eos ());
return GST_FLOW_FLUSHING;
}
pull_error:
{
GST_DEBUG ("Error getting frame from the sinkpad");
return res;
}
push_error:
{
GST_DEBUG ("Error pushing on srcpad");
return res;
}
}
static void
gst_tta_parse_loop (GstTtaParse * ttaparse)
{
GstFlowReturn ret;
if (!ttaparse->header_parsed)
if ((ret = gst_tta_parse_parse_header (ttaparse)) != GST_FLOW_OK)
goto pause;
if ((ret = gst_tta_parse_stream_data (ttaparse)) != GST_FLOW_OK)
goto pause;
return;
pause:
GST_LOG_OBJECT (ttaparse, "pausing task, %s", gst_flow_get_name (ret));
gst_pad_pause_task (ttaparse->sinkpad);
if (ret == GST_FLOW_UNEXPECTED) {
gst_pad_push_event (ttaparse->srcpad, gst_event_new_eos ());
} else if (ret < GST_FLOW_UNEXPECTED || ret == GST_FLOW_NOT_LINKED) {
GST_ELEMENT_ERROR (ttaparse, STREAM, FAILED,
("Internal data stream error."),
("streaming stopped, reason %s", gst_flow_get_name (ret)));
gst_pad_push_event (ttaparse->srcpad, gst_event_new_eos ());
}
}
static GstStateChangeReturn
gst_tta_parse_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstTtaParse *ttaparse = GST_TTA_PARSE (element);
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_tta_parse_reset (ttaparse);
break;
default:
break;
}
return ret;
}
gboolean
gst_tta_parse_plugin_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, "ttaparse",
GST_RANK_NONE, GST_TYPE_TTA_PARSE)) {
return FALSE;
}
GST_DEBUG_CATEGORY_INIT (gst_tta_parse_debug, "ttaparse", 0,
"tta file parser");
return TRUE;
}