gstreamer/ext/musepack/gstmusepackdec.c
2018-08-19 15:44:34 +01:00

638 lines
19 KiB
C

/* GStreamer Musepack decoder plugin
* Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
* Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
* Copyright (C) 2008 Sebastian Dröge <slomo@circular-chaos.org>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstmusepackdec.h"
#include "gstmusepackreader.h"
GST_DEBUG_CATEGORY (musepackdec_debug);
#define GST_CAT_DEFAULT musepackdec_debug
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-musepack, streamversion = (int) { 7, 8 }")
);
#ifdef MPC_FIXED_POINT
# if G_BYTE_ORDER == G_LITTLE_ENDIAN
# define GST_MPC_FORMAT "S32LE"
# else
# define GST_MPC_FORMAT "S32BE"
# endif
#else
# if G_BYTE_ORDER == G_LITTLE_ENDIAN
# define GST_MPC_FORMAT "F32LE"
# else
# define GST_MPC_FORMAT "F32BE"
# endif
#endif
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw, "
"format = (string) " GST_MPC_FORMAT ", "
"layout = (string) interleaved, "
"rate = (int) [ 8000, 96000 ], " "channels = (int) [ 1, 2 ]")
);
static void gst_musepackdec_dispose (GObject * obj);
static gboolean gst_musepackdec_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_musepackdec_src_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static gboolean gst_musepackdec_sink_activate (GstPad * sinkpad,
GstObject * parent);
static gboolean gst_musepackdec_sink_activate_mode (GstPad * sinkpad,
GstObject * parent, GstPadMode mode, gboolean active);
static void gst_musepackdec_loop (GstPad * sinkpad);
static GstStateChangeReturn
gst_musepackdec_change_state (GstElement * element, GstStateChange transition);
#define parent_class gst_musepackdec_parent_class
G_DEFINE_TYPE (GstMusepackDec, gst_musepackdec, GST_TYPE_ELEMENT);
static void
gst_musepackdec_class_init (GstMusepackDecClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_static_pad_template (element_class, &src_template);
gst_element_class_add_static_pad_template (element_class, &sink_template);
gst_element_class_set_static_metadata (element_class, "Musepack decoder",
"Codec/Decoder/Audio",
"Musepack decoder", "Ronald Bultje <rbultje@ronald.bitfreak.net>");
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_musepackdec_dispose);
element_class->change_state =
GST_DEBUG_FUNCPTR (gst_musepackdec_change_state);
}
static void
gst_musepackdec_init (GstMusepackDec * musepackdec)
{
musepackdec->offset = 0;
musepackdec->rate = 0;
musepackdec->bps = 0;
musepackdec->r = g_new (mpc_reader, 1);
musepackdec->sinkpad =
gst_pad_new_from_static_template (&sink_template, "sink");
gst_pad_set_activate_function (musepackdec->sinkpad,
GST_DEBUG_FUNCPTR (gst_musepackdec_sink_activate));
gst_pad_set_activatemode_function (musepackdec->sinkpad,
GST_DEBUG_FUNCPTR (gst_musepackdec_sink_activate_mode));
gst_element_add_pad (GST_ELEMENT (musepackdec), musepackdec->sinkpad);
musepackdec->srcpad = gst_pad_new_from_static_template (&src_template, "src");
gst_pad_set_event_function (musepackdec->srcpad,
GST_DEBUG_FUNCPTR (gst_musepackdec_src_event));
gst_pad_set_query_function (musepackdec->srcpad,
GST_DEBUG_FUNCPTR (gst_musepackdec_src_query));
gst_pad_use_fixed_caps (musepackdec->srcpad);
gst_element_add_pad (GST_ELEMENT (musepackdec), musepackdec->srcpad);
}
static void
gst_musepackdec_dispose (GObject * obj)
{
GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (obj);
g_free (musepackdec->r);
musepackdec->r = NULL;
if (musepackdec->d) {
mpc_demux_exit (musepackdec->d);
musepackdec->d = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (obj);
}
static void
gst_musepackdec_send_newsegment (GstMusepackDec * dec)
{
GstSegment os = dec->segment;
os.format = GST_FORMAT_TIME;
os.start = gst_util_uint64_scale_int (os.start, GST_SECOND, dec->rate);
if (os.stop)
os.stop = gst_util_uint64_scale_int (os.stop, GST_SECOND, dec->rate);
os.time = gst_util_uint64_scale_int (os.time, GST_SECOND, dec->rate);
GST_DEBUG_OBJECT (dec, "sending newsegment from %" GST_TIME_FORMAT
" to %" GST_TIME_FORMAT ", rate = %.1f", GST_TIME_ARGS (os.start),
GST_TIME_ARGS (os.stop), os.rate);
gst_pad_push_event (dec->srcpad, gst_event_new_segment (&os));
}
static gboolean
gst_musepackdec_handle_seek_event (GstMusepackDec * dec, GstEvent * event)
{
GstSeekType start_type, stop_type;
GstSeekFlags flags;
GstSegment segment;
GstFormat format;
gboolean flush;
gdouble rate;
gint64 start, stop;
gint samplerate;
gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
&stop_type, &stop);
if (format != GST_FORMAT_TIME && format != GST_FORMAT_DEFAULT) {
GST_DEBUG_OBJECT (dec, "seek failed: only TIME or DEFAULT format allowed");
return FALSE;
}
samplerate = g_atomic_int_get (&dec->rate);
if (format == GST_FORMAT_TIME) {
if (start_type != GST_SEEK_TYPE_NONE)
start = gst_util_uint64_scale_int (start, samplerate, GST_SECOND);
if (stop_type != GST_SEEK_TYPE_NONE)
stop = gst_util_uint64_scale_int (stop, samplerate, GST_SECOND);
}
flush = ((flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH);
if (flush)
gst_pad_push_event (dec->srcpad, gst_event_new_flush_start ());
else
gst_pad_pause_task (dec->sinkpad); /* not _stop_task()? */
GST_PAD_STREAM_LOCK (dec->sinkpad);
/* operate on segment copy until we know the seek worked */
segment = dec->segment;
gst_segment_do_seek (&segment, rate, GST_FORMAT_DEFAULT,
flags, start_type, start, stop_type, stop, NULL);
gst_pad_push_event (dec->sinkpad, gst_event_new_flush_stop (TRUE));
GST_DEBUG_OBJECT (dec, "segment: [%" G_GINT64_FORMAT "-%" G_GINT64_FORMAT
"] = [%" GST_TIME_FORMAT "-%" GST_TIME_FORMAT "]",
segment.start, segment.stop,
GST_TIME_ARGS (segment.start * GST_SECOND / dec->rate),
GST_TIME_ARGS (segment.stop * GST_SECOND / dec->rate));
GST_DEBUG_OBJECT (dec, "performing seek to sample %" G_GINT64_FORMAT,
segment.start);
if (segment.start >= segment.duration) {
GST_WARNING_OBJECT (dec, "seek out of bounds");
goto failed;
}
if (mpc_demux_seek_sample (dec->d, segment.start) != MPC_STATUS_OK)
goto failed;
if ((flags & GST_SEEK_FLAG_SEGMENT) == GST_SEEK_FLAG_SEGMENT) {
GST_DEBUG_OBJECT (dec, "posting SEGMENT_START message");
gst_element_post_message (GST_ELEMENT (dec),
gst_message_new_segment_start (GST_OBJECT (dec), GST_FORMAT_TIME,
gst_util_uint64_scale_int (segment.start, GST_SECOND, dec->rate)));
}
if (flush) {
gst_pad_push_event (dec->srcpad, gst_event_new_flush_stop (TRUE));
}
segment.position = segment.start;
dec->segment = segment;
gst_musepackdec_send_newsegment (dec);
GST_DEBUG_OBJECT (dec, "seek successful");
gst_pad_start_task (dec->sinkpad,
(GstTaskFunction) gst_musepackdec_loop, dec->sinkpad, NULL);
GST_PAD_STREAM_UNLOCK (dec->sinkpad);
return TRUE;
failed:
{
GST_WARNING_OBJECT (dec, "seek failed");
GST_PAD_STREAM_UNLOCK (dec->sinkpad);
return FALSE;
}
}
static gboolean
gst_musepackdec_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstMusepackDec *dec;
gboolean res;
dec = GST_MUSEPACK_DEC (parent);
GST_DEBUG_OBJECT (dec, "handling %s event", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
res = gst_musepackdec_handle_seek_event (dec, event);
break;
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
return res;
}
static gboolean
gst_musepackdec_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (parent);
GstFormat format;
gboolean res = FALSE;
gint samplerate;
samplerate = g_atomic_int_get (&musepackdec->rate);
if (samplerate == 0)
goto done;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:{
gint64 cur, cur_off;
gst_query_parse_position (query, &format, NULL);
GST_OBJECT_LOCK (musepackdec);
cur_off = musepackdec->segment.position;
GST_OBJECT_UNLOCK (musepackdec);
if (format == GST_FORMAT_TIME) {
cur = gst_util_uint64_scale_int (cur_off, GST_SECOND, samplerate);
gst_query_set_position (query, GST_FORMAT_TIME, cur);
res = TRUE;
} else if (format == GST_FORMAT_DEFAULT) {
gst_query_set_position (query, GST_FORMAT_DEFAULT, cur_off);
res = TRUE;
}
break;
}
case GST_QUERY_DURATION:{
gint64 len, len_off;
gst_query_parse_duration (query, &format, NULL);
GST_OBJECT_LOCK (musepackdec);
len_off = musepackdec->segment.duration;
GST_OBJECT_UNLOCK (musepackdec);
if (format == GST_FORMAT_TIME) {
len = gst_util_uint64_scale_int (len_off, GST_SECOND, samplerate);
gst_query_set_duration (query, GST_FORMAT_TIME, len);
res = TRUE;
} else if (format == GST_FORMAT_DEFAULT) {
gst_query_set_duration (query, GST_FORMAT_DEFAULT, len_off);
res = TRUE;
}
break;
}
case GST_QUERY_SEEKING:{
GstFormat fmt;
gint64 len, len_off;
res = TRUE;
gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
GST_OBJECT_LOCK (musepackdec);
len_off = musepackdec->segment.duration;
GST_OBJECT_UNLOCK (musepackdec);
if (fmt == GST_FORMAT_TIME) {
len = gst_util_uint64_scale_int (len_off, GST_SECOND, samplerate);
gst_query_set_seeking (query, fmt, TRUE, 0, len);
} else if (fmt == GST_FORMAT_DEFAULT) {
gst_query_set_seeking (query, fmt, TRUE, 0, len_off);
} else {
gst_query_set_seeking (query, fmt, FALSE, -1, -1);
}
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
done:
return res;
}
static gboolean
gst_musepack_stream_init (GstMusepackDec * musepackdec)
{
mpc_streaminfo i;
GstTagList *tags;
GstCaps *caps;
gchar *stream_id;
/* set up reading */
gst_musepack_init_reader (musepackdec->r, musepackdec);
musepackdec->d = mpc_demux_init (musepackdec->r);
if (!musepackdec->d) {
GST_ELEMENT_ERROR (musepackdec, STREAM, WRONG_TYPE, (NULL), (NULL));
return FALSE;
}
mpc_demux_get_info (musepackdec->d, &i);
stream_id = gst_pad_create_stream_id (musepackdec->srcpad,
GST_ELEMENT_CAST (musepackdec), NULL);
gst_pad_push_event (musepackdec->srcpad,
gst_event_new_stream_start (stream_id));
g_free (stream_id);
/* capsnego */
caps = gst_caps_new_simple ("audio/x-raw",
"format", G_TYPE_STRING, GST_MPC_FORMAT,
"layout", G_TYPE_STRING, "interleaved",
"channels", G_TYPE_INT, i.channels,
"rate", G_TYPE_INT, i.sample_freq, NULL);
gst_pad_use_fixed_caps (musepackdec->srcpad);
if (!gst_pad_set_caps (musepackdec->srcpad, caps)) {
GST_ELEMENT_ERROR (musepackdec, CORE, NEGOTIATION, (NULL), (NULL));
return FALSE;
}
g_atomic_int_set (&musepackdec->bps, 4 * i.channels);
g_atomic_int_set (&musepackdec->rate, i.sample_freq);
musepackdec->segment.position = 0;
musepackdec->segment.duration = mpc_streaminfo_get_length_samples (&i);
/* send basic tags */
tags = gst_tag_list_new_empty ();
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE,
GST_TAG_AUDIO_CODEC, "Musepack", NULL);
if (i.encoder[0] != '\0' && i.encoder_version > 0) {
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE,
GST_TAG_ENCODER, i.encoder,
GST_TAG_ENCODER_VERSION, i.encoder_version, NULL);
}
if (i.bitrate > 0) {
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE,
GST_TAG_BITRATE, i.bitrate, NULL);
} else if (i.average_bitrate > 0.0) {
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE,
GST_TAG_BITRATE, (guint) i.average_bitrate, NULL);
}
if (i.gain_title != 0 || i.gain_album != 0) {
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE,
GST_TAG_TRACK_GAIN, (gdouble) i.gain_title / 100.0,
GST_TAG_ALBUM_GAIN, (gdouble) i.gain_album / 100.0, NULL);
}
if (i.peak_title != 0 && i.peak_title != 32767 &&
i.peak_album != 0 && i.peak_album != 32767) {
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE,
GST_TAG_TRACK_PEAK, (gdouble) i.peak_title / 32767.0,
GST_TAG_ALBUM_PEAK, (gdouble) i.peak_album / 32767.0, NULL);
}
GST_LOG_OBJECT (musepackdec, "Posting tags: %" GST_PTR_FORMAT, tags);
gst_pad_push_event (musepackdec->srcpad, gst_event_new_tag (tags));
return TRUE;
}
static gboolean
gst_musepackdec_sink_activate (GstPad * sinkpad, GstObject * parent)
{
GstQuery *query;
gboolean pull_mode;
query = gst_query_new_scheduling ();
if (!gst_pad_peer_query (sinkpad, query)) {
gst_query_unref (query);
return FALSE;
}
pull_mode = gst_query_has_scheduling_mode_with_flags (query,
GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE);
gst_query_unref (query);
if (!pull_mode)
return FALSE;
GST_DEBUG_OBJECT (sinkpad, "activating pull");
return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE);
}
static gboolean
gst_musepackdec_sink_activate_mode (GstPad * sinkpad, GstObject * parent,
GstPadMode mode, gboolean active)
{
gboolean result;
switch (mode) {
case GST_PAD_MODE_PUSH:
result = FALSE;
break;
case GST_PAD_MODE_PULL:
if (active) {
result = gst_pad_start_task (sinkpad,
(GstTaskFunction) gst_musepackdec_loop, sinkpad, NULL);
} else {
result = gst_pad_stop_task (sinkpad);
}
break;
default:
result = FALSE;
break;
}
return result;
}
static void
gst_musepackdec_loop (GstPad * sinkpad)
{
GstMusepackDec *musepackdec;
GstFlowReturn flow;
GstBuffer *out;
GstMapInfo info;
mpc_frame_info frame;
mpc_status err;
gint num_samples, samplerate, bitspersample;
musepackdec = GST_MUSEPACK_DEC (GST_PAD_PARENT (sinkpad));
samplerate = g_atomic_int_get (&musepackdec->rate);
if (samplerate == 0) {
if (!gst_musepack_stream_init (musepackdec))
goto pause_task;
gst_musepackdec_send_newsegment (musepackdec);
samplerate = g_atomic_int_get (&musepackdec->rate);
}
bitspersample = g_atomic_int_get (&musepackdec->bps);
out = gst_buffer_new_allocate (NULL, MPC_DECODER_BUFFER_LENGTH * 4, NULL);
gst_buffer_map (out, &info, GST_MAP_READWRITE);
frame.buffer = (MPC_SAMPLE_FORMAT *) info.data;
err = mpc_demux_decode (musepackdec->d, &frame);
gst_buffer_unmap (out, &info);
if (err != MPC_STATUS_OK) {
GST_ERROR_OBJECT (musepackdec, "Failed to decode sample");
GST_ELEMENT_ERROR (musepackdec, STREAM, DECODE, (NULL), (NULL));
goto pause_task;
} else if (frame.bits == -1) {
goto eos_and_pause;
}
num_samples = frame.samples;
gst_buffer_set_size (out, num_samples * bitspersample);
GST_BUFFER_OFFSET (out) = musepackdec->segment.position;
GST_BUFFER_PTS (out) =
gst_util_uint64_scale_int (musepackdec->segment.position,
GST_SECOND, samplerate);
GST_BUFFER_DURATION (out) =
gst_util_uint64_scale_int (num_samples, GST_SECOND, samplerate);
musepackdec->segment.position += num_samples;
GST_LOG_OBJECT (musepackdec, "Pushing buffer, timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (out)));
flow = gst_pad_push (musepackdec->srcpad, out);
if (flow != GST_FLOW_OK) {
GST_DEBUG_OBJECT (musepackdec, "Flow: %s", gst_flow_get_name (flow));
goto pause_task;
}
/* check if we're at the end of a configured segment */
if (musepackdec->segment.stop != -1 &&
musepackdec->segment.position >= musepackdec->segment.stop) {
gint64 stop_time;
GST_DEBUG_OBJECT (musepackdec, "Reached end of configured segment");
if ((musepackdec->segment.flags & GST_SEEK_FLAG_SEGMENT) == 0)
goto eos_and_pause;
GST_DEBUG_OBJECT (musepackdec, "Posting SEGMENT_DONE message");
stop_time = gst_util_uint64_scale_int (musepackdec->segment.stop,
GST_SECOND, samplerate);
gst_element_post_message (GST_ELEMENT (musepackdec),
gst_message_new_segment_done (GST_OBJECT (musepackdec),
GST_FORMAT_TIME, stop_time));
gst_pad_push_event (musepackdec->srcpad,
gst_event_new_segment_done (GST_FORMAT_TIME, stop_time));
goto pause_task;
}
return;
eos_and_pause:
{
GST_DEBUG_OBJECT (musepackdec, "sending EOS event");
gst_pad_push_event (musepackdec->srcpad, gst_event_new_eos ());
/* fall through to pause */
}
pause_task:
{
GST_DEBUG_OBJECT (musepackdec, "Pausing task");
gst_pad_pause_task (sinkpad);
return;
}
}
static GstStateChangeReturn
gst_musepackdec_change_state (GstElement * element, GstStateChange transition)
{
GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_segment_init (&musepackdec->segment, GST_FORMAT_DEFAULT);
musepackdec->segment.position = 0;
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_segment_init (&musepackdec->segment, GST_FORMAT_UNDEFINED);
musepackdec->offset = 0;
musepackdec->rate = 0;
musepackdec->bps = 0;
break;
default:
break;
}
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (musepackdec_debug, "musepackdec", 0, "mpc decoder");
return gst_element_register (plugin, "musepackdec",
GST_RANK_PRIMARY, GST_TYPE_MUSEPACK_DEC);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
musepack,
"Musepack decoder", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,
GST_PACKAGE_ORIGIN)