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gstreamer/ext/libvisual/visual.c
Wim Taymans f379a5dacb plugins: more porting to new memory API
2011-03-27 18:30:24 +02:00

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/* GStreamer
* Copyright (C) 2004 Benjamin Otte <otte@gnome.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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
#include <gst/video/video.h>
#include <gst/audio/audio.h>
#include <libvisual/libvisual.h>
#define GST_TYPE_VISUAL (gst_visual_get_type())
#define GST_IS_VISUAL(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VISUAL))
#define GST_VISUAL(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VISUAL,GstVisual))
#define GST_IS_VISUAL_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VISUAL))
#define GST_VISUAL_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VISUAL,GstVisualClass))
#define GST_VISUAL_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_VISUAL, GstVisualClass))
typedef struct _GstVisual GstVisual;
typedef struct _GstVisualClass GstVisualClass;
GST_DEBUG_CATEGORY_STATIC (libvisual_debug);
#define GST_CAT_DEFAULT (libvisual_debug)
/* amounf of samples before we can feed libvisual */
#define VISUAL_SAMPLES 512
#define DEFAULT_WIDTH 320
#define DEFAULT_HEIGHT 240
#define DEFAULT_FPS_N 25
#define DEFAULT_FPS_D 1
struct _GstVisual
{
GstElement element;
/* pads */
GstPad *sinkpad;
GstPad *srcpad;
GstSegment segment;
/* libvisual stuff */
VisAudio *audio;
VisVideo *video;
VisActor *actor;
/* audio/video state */
gint channels;
gint rate; /* Input samplerate */
gint bps;
/* framerate numerator & denominator */
gint fps_n;
gint fps_d;
gint width;
gint height;
GstClockTime duration;
guint outsize;
/* samples per frame based on caps */
guint spf;
/* state stuff */
GstAdapter *adapter;
guint count;
/* QoS stuff *//* with LOCK */
gdouble proportion;
GstClockTime earliest_time;
};
struct _GstVisualClass
{
GstElementClass parent_class;
VisPluginRef *plugin;
};
GType gst_visual_get_type (void);
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_xRGB_HOST_ENDIAN "; "
#if G_BYTE_ORDER == G_BIG_ENDIAN
GST_VIDEO_CAPS_RGB "; "
#else
GST_VIDEO_CAPS_BGR "; "
#endif
GST_VIDEO_CAPS_RGB_16)
);
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"width = (int) 16, "
"depth = (int) 16, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) TRUE, " "channels = (int) { 1, 2 }, "
#if defined(VISUAL_API_VERSION) && VISUAL_API_VERSION >= 4000 && VISUAL_API_VERSION < 5000
"rate = (int) { 8000, 11250, 22500, 32000, 44100, 48000, 96000 }"
#else
"rate = (int) [ 1000, MAX ]"
#endif
)
);
static void gst_visual_class_init (gpointer g_class, gpointer class_data);
static void gst_visual_init (GstVisual * visual);
static void gst_visual_dispose (GObject * object);
static GstStateChangeReturn gst_visual_change_state (GstElement * element,
GstStateChange transition);
static GstFlowReturn gst_visual_chain (GstPad * pad, GstBuffer * buffer);
static gboolean gst_visual_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_visual_src_event (GstPad * pad, GstEvent * event);
static gboolean gst_visual_src_query (GstPad * pad, GstQuery * query);
static gboolean gst_visual_sink_setcaps (GstPad * pad, GstCaps * caps);
static gboolean gst_visual_src_setcaps (GstPad * pad, GstCaps * caps);
static GstCaps *gst_visual_getcaps (GstPad * pad);
static void libvisual_log_handler (const char *message, const char *funcname,
void *priv);
static GstElementClass *parent_class = NULL;
GType
gst_visual_get_type (void)
{
static GType type = 0;
if (G_UNLIKELY (type == 0)) {
static const GTypeInfo info = {
sizeof (GstVisualClass),
NULL,
NULL,
gst_visual_class_init,
NULL,
NULL,
sizeof (GstVisual),
0,
(GInstanceInitFunc) gst_visual_init,
};
type = g_type_register_static (GST_TYPE_ELEMENT, "GstVisual", &info, 0);
}
return type;
}
static void
libvisual_log_handler (const char *message, const char *funcname, void *priv)
{
GST_CAT_LEVEL_LOG (libvisual_debug, (GstDebugLevel) (priv), NULL, "%s - %s",
funcname, message);
}
static void
gst_visual_class_init (gpointer g_class, gpointer class_data)
{
GstVisualClass *klass = GST_VISUAL_CLASS (g_class);
GstElementClass *element = GST_ELEMENT_CLASS (g_class);
GObjectClass *object = G_OBJECT_CLASS (g_class);
klass->plugin = class_data;
element->change_state = gst_visual_change_state;
if (class_data == NULL) {
parent_class = g_type_class_peek_parent (g_class);
} else {
char *longname = g_strdup_printf ("libvisual %s plugin v.%s",
klass->plugin->info->name, klass->plugin->info->version);
/* FIXME: improve to only register what plugin supports? */
gst_element_class_add_pad_template (element,
gst_static_pad_template_get (&src_template));
gst_element_class_add_pad_template (element,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_details_simple (element,
longname, "Visualization",
klass->plugin->info->about, "Benjamin Otte <otte@gnome.org>");
g_free (longname);
}
object->dispose = gst_visual_dispose;
}
static void
gst_visual_init (GstVisual * visual)
{
/* create the sink and src pads */
visual->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
gst_pad_set_setcaps_function (visual->sinkpad, gst_visual_sink_setcaps);
gst_pad_set_chain_function (visual->sinkpad, gst_visual_chain);
gst_pad_set_event_function (visual->sinkpad, gst_visual_sink_event);
gst_element_add_pad (GST_ELEMENT (visual), visual->sinkpad);
visual->srcpad = gst_pad_new_from_static_template (&src_template, "src");
gst_pad_set_setcaps_function (visual->srcpad, gst_visual_src_setcaps);
gst_pad_set_getcaps_function (visual->srcpad, gst_visual_getcaps);
gst_pad_set_event_function (visual->srcpad, gst_visual_src_event);
gst_pad_set_query_function (visual->srcpad, gst_visual_src_query);
gst_element_add_pad (GST_ELEMENT (visual), visual->srcpad);
visual->adapter = gst_adapter_new ();
}
static void
gst_visual_clear_actors (GstVisual * visual)
{
if (visual->actor) {
visual_object_unref (VISUAL_OBJECT (visual->actor));
visual->actor = NULL;
}
if (visual->video) {
visual_object_unref (VISUAL_OBJECT (visual->video));
visual->video = NULL;
}
if (visual->audio) {
visual_object_unref (VISUAL_OBJECT (visual->audio));
visual->audio = NULL;
}
}
static void
gst_visual_dispose (GObject * object)
{
GstVisual *visual = GST_VISUAL (object);
if (visual->adapter) {
g_object_unref (visual->adapter);
visual->adapter = NULL;
}
gst_visual_clear_actors (visual);
GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
}
static void
gst_visual_reset (GstVisual * visual)
{
gst_adapter_clear (visual->adapter);
gst_segment_init (&visual->segment, GST_FORMAT_UNDEFINED);
GST_OBJECT_LOCK (visual);
visual->proportion = 1.0;
visual->earliest_time = -1;
GST_OBJECT_UNLOCK (visual);
}
static GstCaps *
gst_visual_getcaps (GstPad * pad)
{
GstCaps *ret;
GstVisual *visual = GST_VISUAL (gst_pad_get_parent (pad));
int depths;
if (!visual->actor) {
ret = gst_caps_copy (gst_pad_get_pad_template_caps (visual->srcpad));
goto beach;
}
ret = gst_caps_new_empty ();
depths = visual_actor_get_supported_depth (visual->actor);
if (depths < 0) {
/* FIXME: set an error */
goto beach;
}
if (depths == VISUAL_VIDEO_DEPTH_GL) {
/* We can't handle GL only plugins */
goto beach;
}
GST_DEBUG_OBJECT (visual, "libvisual plugin supports depths %u (0x%04x)",
depths, depths);
/* if (depths & VISUAL_VIDEO_DEPTH_32BIT) Always supports 32bit output */
gst_caps_append (ret, gst_caps_from_string (GST_VIDEO_CAPS_xRGB_HOST_ENDIAN));
if (depths & VISUAL_VIDEO_DEPTH_24BIT) {
#if G_BYTE_ORDER == G_BIG_ENDIAN
gst_caps_append (ret, gst_caps_from_string (GST_VIDEO_CAPS_RGB));
#else
gst_caps_append (ret, gst_caps_from_string (GST_VIDEO_CAPS_BGR));
#endif
}
if (depths & VISUAL_VIDEO_DEPTH_16BIT) {
gst_caps_append (ret, gst_caps_from_string (GST_VIDEO_CAPS_RGB_16));
}
beach:
GST_DEBUG_OBJECT (visual, "returning caps %" GST_PTR_FORMAT, ret);
gst_object_unref (visual);
return ret;
}
static gboolean
gst_visual_src_setcaps (GstPad * pad, GstCaps * caps)
{
GstVisual *visual = GST_VISUAL (gst_pad_get_parent (pad));
GstStructure *structure;
gint depth, pitch;
structure = gst_caps_get_structure (caps, 0);
GST_DEBUG_OBJECT (visual, "src pad got caps %" GST_PTR_FORMAT, caps);
if (!gst_structure_get_int (structure, "width", &visual->width))
goto error;
if (!gst_structure_get_int (structure, "height", &visual->height))
goto error;
if (!gst_structure_get_int (structure, "bpp", &depth))
goto error;
if (!gst_structure_get_fraction (structure, "framerate", &visual->fps_n,
&visual->fps_d))
goto error;
visual_video_set_depth (visual->video,
visual_video_depth_enum_from_value (depth));
visual_video_set_dimension (visual->video, visual->width, visual->height);
pitch = GST_ROUND_UP_4 (visual->width * visual->video->bpp);
visual_video_set_pitch (visual->video, pitch);
visual_actor_video_negotiate (visual->actor, 0, FALSE, FALSE);
/* precalc some values */
visual->outsize = visual->video->height * pitch;
visual->spf =
gst_util_uint64_scale_int (visual->rate, visual->fps_d, visual->fps_n);
visual->duration =
gst_util_uint64_scale_int (GST_SECOND, visual->fps_d, visual->fps_n);
gst_object_unref (visual);
return TRUE;
/* ERRORS */
error:
{
GST_DEBUG_OBJECT (visual, "error parsing caps");
gst_object_unref (visual);
return FALSE;
}
}
static gboolean
gst_visual_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstVisual *visual = GST_VISUAL (gst_pad_get_parent (pad));
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "channels", &visual->channels);
gst_structure_get_int (structure, "rate", &visual->rate);
/* this is how many samples we need to fill one frame at the requested
* framerate. */
if (visual->fps_n != 0) {
visual->spf =
gst_util_uint64_scale_int (visual->rate, visual->fps_d, visual->fps_n);
}
visual->bps = visual->channels * sizeof (gint16);
gst_object_unref (visual);
return TRUE;
}
static gboolean
gst_vis_src_negotiate (GstVisual * visual)
{
GstCaps *othercaps, *target;
GstStructure *structure;
GstCaps *caps;
caps = gst_pad_get_caps (visual->srcpad);
/* see what the peer can do */
othercaps = gst_pad_peer_get_caps (visual->srcpad);
if (othercaps) {
target = gst_caps_intersect (othercaps, caps);
gst_caps_unref (othercaps);
gst_caps_unref (caps);
if (gst_caps_is_empty (target))
goto no_format;
gst_caps_truncate (target);
} else {
/* need a copy, we'll be modifying it when fixating */
target = gst_caps_copy (caps);
gst_caps_unref (caps);
}
/* fixate in case something is not fixed. This does nothing if the value is
* already fixed. For video we always try to fixate to something like
* 320x240x25 by convention. */
structure = gst_caps_get_structure (target, 0);
gst_structure_fixate_field_nearest_int (structure, "width", DEFAULT_WIDTH);
gst_structure_fixate_field_nearest_int (structure, "height", DEFAULT_HEIGHT);
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
DEFAULT_FPS_N, DEFAULT_FPS_D);
gst_pad_set_caps (visual->srcpad, target);
gst_caps_unref (target);
return TRUE;
/* ERRORS */
no_format:
{
GST_ELEMENT_ERROR (visual, STREAM, FORMAT, (NULL),
("could not negotiate output format"));
gst_caps_unref (target);
return FALSE;
}
}
static gboolean
gst_visual_sink_event (GstPad * pad, GstEvent * event)
{
GstVisual *visual;
gboolean res;
visual = GST_VISUAL (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
res = gst_pad_push_event (visual->srcpad, event);
break;
case GST_EVENT_FLUSH_STOP:
/* reset QoS and adapter. */
gst_visual_reset (visual);
res = gst_pad_push_event (visual->srcpad, event);
break;
case GST_EVENT_NEWSEGMENT:
{
GstFormat format;
gdouble rate, arate;
gint64 start, stop, time;
gboolean update;
/* the newsegment values are used to clip the input samples
* and to convert the incomming timestamps to running time so
* we can do QoS */
gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
&start, &stop, &time);
/* now configure the values */
gst_segment_set_newsegment_full (&visual->segment, update,
rate, arate, format, start, stop, time);
/* and forward */
res = gst_pad_push_event (visual->srcpad, event);
break;
}
default:
res = gst_pad_push_event (visual->srcpad, event);
break;
}
gst_object_unref (visual);
return res;
}
static gboolean
gst_visual_src_event (GstPad * pad, GstEvent * event)
{
GstVisual *visual;
gboolean res;
visual = GST_VISUAL (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_QOS:
{
gdouble proportion;
GstClockTimeDiff diff;
GstClockTime timestamp;
gst_event_parse_qos (event, &proportion, &diff, &timestamp);
/* save stuff for the _chain function */
GST_OBJECT_LOCK (visual);
visual->proportion = proportion;
if (diff >= 0)
/* we're late, this is a good estimate for next displayable
* frame (see part-qos.txt) */
visual->earliest_time = timestamp + 2 * diff + visual->duration;
else
visual->earliest_time = timestamp + diff;
GST_OBJECT_UNLOCK (visual);
res = gst_pad_push_event (visual->sinkpad, event);
break;
}
default:
res = gst_pad_push_event (visual->sinkpad, event);
break;
}
gst_object_unref (visual);
return res;
}
static gboolean
gst_visual_src_query (GstPad * pad, GstQuery * query)
{
gboolean res;
GstVisual *visual;
visual = GST_VISUAL (gst_pad_get_parent (pad));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
/* We need to send the query upstream and add the returned latency to our
* own */
GstClockTime min_latency, max_latency;
gboolean us_live;
GstClockTime our_latency;
guint max_samples;
if ((res = gst_pad_peer_query (visual->sinkpad, query))) {
gst_query_parse_latency (query, &us_live, &min_latency, &max_latency);
GST_DEBUG_OBJECT (visual, "Peer latency: min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
/* the max samples we must buffer buffer */
max_samples = MAX (VISUAL_SAMPLES, visual->spf);
our_latency =
gst_util_uint64_scale_int (max_samples, GST_SECOND, visual->rate);
GST_DEBUG_OBJECT (visual, "Our latency: %" GST_TIME_FORMAT,
GST_TIME_ARGS (our_latency));
/* we add some latency but only if we need to buffer more than what
* upstream gives us */
min_latency += our_latency;
if (max_latency != -1)
max_latency += our_latency;
GST_DEBUG_OBJECT (visual, "Calculated total latency : min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
gst_query_set_latency (query, TRUE, min_latency, max_latency);
}
break;
}
default:
res = gst_pad_peer_query (visual->sinkpad, query);
break;
}
gst_object_unref (visual);
return res;
}
/* allocate and output buffer, if no format was negotiated, this
* function will negotiate one. After calling this function, a
* reverse negotiation could have happened. */
static GstFlowReturn
get_buffer (GstVisual * visual, GstBuffer ** outbuf)
{
GstFlowReturn ret;
/* we don't know an output format yet, pick one */
if (GST_PAD_CAPS (visual->srcpad) == NULL) {
if (!gst_vis_src_negotiate (visual))
return GST_FLOW_NOT_NEGOTIATED;
}
GST_DEBUG_OBJECT (visual, "allocating output buffer with caps %"
GST_PTR_FORMAT, GST_PAD_CAPS (visual->srcpad));
/* now allocate a buffer with the last negotiated format.
* Downstream could renegotiate a new format, which will trigger
* our setcaps function on the source pad. */
ret =
gst_pad_alloc_buffer_and_set_caps (visual->srcpad,
GST_BUFFER_OFFSET_NONE, visual->outsize,
GST_PAD_CAPS (visual->srcpad), outbuf);
/* no buffer allocated, we don't care why. */
if (ret != GST_FLOW_OK)
return ret;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_visual_chain (GstPad * pad, GstBuffer * buffer)
{
GstBuffer *outbuf = NULL;
guint i;
GstVisual *visual = GST_VISUAL (gst_pad_get_parent (pad));
GstFlowReturn ret = GST_FLOW_OK;
guint avail;
GST_DEBUG_OBJECT (visual, "chain function called");
/* If we don't have an output format yet, preallocate a buffer to try and
* set one */
if (GST_PAD_CAPS (visual->srcpad) == NULL) {
ret = get_buffer (visual, &outbuf);
if (ret != GST_FLOW_OK) {
gst_buffer_unref (buffer);
goto beach;
}
}
/* resync on DISCONT */
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT)) {
gst_adapter_clear (visual->adapter);
}
GST_DEBUG_OBJECT (visual,
"Input buffer has %d samples, time=%" G_GUINT64_FORMAT,
gst_buffer_get_size (buffer) / visual->bps,
GST_BUFFER_TIMESTAMP (buffer));
gst_adapter_push (visual->adapter, buffer);
while (TRUE) {
gboolean need_skip;
const guint16 *data;
guint64 dist, timestamp;
guint8 *outdata;
gsize outsize;
GST_DEBUG_OBJECT (visual, "processing buffer");
avail = gst_adapter_available (visual->adapter);
GST_DEBUG_OBJECT (visual, "avail now %u", avail);
/* we need at least VISUAL_SAMPLES samples */
if (avail < VISUAL_SAMPLES * visual->bps)
break;
/* we need at least enough samples to make one frame */
if (avail < visual->spf * visual->bps)
break;
/* get timestamp of the current adapter byte */
timestamp = gst_adapter_prev_timestamp (visual->adapter, &dist);
if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
/* convert bytes to time */
dist /= visual->bps;
timestamp += gst_util_uint64_scale_int (dist, GST_SECOND, visual->rate);
}
if (timestamp != -1) {
gint64 qostime;
/* QoS is done on running time */
qostime = gst_segment_to_running_time (&visual->segment, GST_FORMAT_TIME,
timestamp);
qostime += visual->duration;
GST_OBJECT_LOCK (visual);
/* check for QoS, don't compute buffers that are known to be late */
need_skip = visual->earliest_time != -1 &&
qostime <= visual->earliest_time;
GST_OBJECT_UNLOCK (visual);
if (need_skip) {
GST_WARNING_OBJECT (visual,
"QoS: skip ts: %" GST_TIME_FORMAT ", earliest: %" GST_TIME_FORMAT,
GST_TIME_ARGS (qostime), GST_TIME_ARGS (visual->earliest_time));
goto skip;
}
}
/* Read VISUAL_SAMPLES samples per channel */
data =
(const guint16 *) gst_adapter_map (visual->adapter,
VISUAL_SAMPLES * visual->bps);
#if defined(VISUAL_API_VERSION) && VISUAL_API_VERSION >= 4000 && VISUAL_API_VERSION < 5000
{
VisBuffer *lbuf, *rbuf;
guint16 ldata[VISUAL_SAMPLES], rdata[VISUAL_SAMPLES];
VisAudioSampleRateType rate;
lbuf = visual_buffer_new_with_buffer (ldata, sizeof (ldata), NULL);
rbuf = visual_buffer_new_with_buffer (rdata, sizeof (rdata), NULL);
if (visual->channels == 2) {
for (i = 0; i < VISUAL_SAMPLES; i++) {
ldata[i] = *data++;
rdata[i] = *data++;
}
} else {
for (i = 0; i < VISUAL_SAMPLES; i++) {
ldata[i] = *data;
rdata[i] = *data++;
}
}
switch (visual->rate) {
case 8000:
rate = VISUAL_AUDIO_SAMPLE_RATE_8000;
break;
case 11250:
rate = VISUAL_AUDIO_SAMPLE_RATE_11250;
break;
case 22500:
rate = VISUAL_AUDIO_SAMPLE_RATE_22500;
break;
case 32000:
rate = VISUAL_AUDIO_SAMPLE_RATE_32000;
break;
case 44100:
rate = VISUAL_AUDIO_SAMPLE_RATE_44100;
break;
case 48000:
rate = VISUAL_AUDIO_SAMPLE_RATE_48000;
break;
case 96000:
rate = VISUAL_AUDIO_SAMPLE_RATE_96000;
break;
default:
visual_object_unref (VISUAL_OBJECT (lbuf));
visual_object_unref (VISUAL_OBJECT (rbuf));
GST_ERROR_OBJECT (visual, "unsupported rate %d", visual->rate);
ret = GST_FLOW_ERROR;
goto beach;
break;
}
visual_audio_samplepool_input_channel (visual->audio->samplepool,
lbuf,
rate, VISUAL_AUDIO_SAMPLE_FORMAT_S16,
(char *) VISUAL_AUDIO_CHANNEL_LEFT);
visual_audio_samplepool_input_channel (visual->audio->samplepool, rbuf,
rate, VISUAL_AUDIO_SAMPLE_FORMAT_S16,
(char *) VISUAL_AUDIO_CHANNEL_RIGHT);
visual_object_unref (VISUAL_OBJECT (lbuf));
visual_object_unref (VISUAL_OBJECT (rbuf));
}
#else
if (visual->channels == 2) {
for (i = 0; i < VISUAL_SAMPLES; i++) {
visual->audio->plugpcm[0][i] = *data++;
visual->audio->plugpcm[1][i] = *data++;
}
} else {
for (i = 0; i < VISUAL_SAMPLES; i++) {
visual->audio->plugpcm[0][i] = *data;
visual->audio->plugpcm[1][i] = *data++;
}
}
#endif
/* alloc a buffer if we don't have one yet, this happens
* when we pushed a buffer in this while loop before */
if (outbuf == NULL) {
ret = get_buffer (visual, &outbuf);
if (ret != GST_FLOW_OK) {
gst_adapter_unmap (visual->adapter, 0);
goto beach;
}
}
outdata = gst_buffer_map (outbuf, &outsize, NULL, GST_MAP_WRITE);
visual_video_set_buffer (visual->video, outdata);
visual_audio_analyze (visual->audio);
visual_actor_run (visual->actor, visual->audio);
visual_video_set_buffer (visual->video, NULL);
gst_buffer_unmap (outbuf, outdata, outsize);
GST_DEBUG_OBJECT (visual, "rendered one frame");
gst_adapter_unmap (visual->adapter, 0);
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
GST_BUFFER_DURATION (outbuf) = visual->duration;
ret = gst_pad_push (visual->srcpad, outbuf);
outbuf = NULL;
skip:
GST_DEBUG_OBJECT (visual, "finished frame, flushing %u samples from input",
visual->spf);
/* Flush out the number of samples per frame */
gst_adapter_flush (visual->adapter, visual->spf * visual->bps);
/* quit the loop if something was wrong */
if (ret != GST_FLOW_OK)
break;
}
beach:
if (outbuf != NULL)
gst_buffer_unref (outbuf);
gst_object_unref (visual);
return ret;
}
static GstStateChangeReturn
gst_visual_change_state (GstElement * element, GstStateChange transition)
{
GstVisual *visual = GST_VISUAL (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
visual->actor =
visual_actor_new (GST_VISUAL_GET_CLASS (visual)->plugin->
info->plugname);
visual->video = visual_video_new ();
visual->audio = visual_audio_new ();
/* can't have a play without actors */
if (!visual->actor || !visual->video)
goto no_actors;
if (visual_actor_realize (visual->actor) != 0)
goto no_realize;
visual_actor_set_video (visual->actor, visual->video);
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_visual_reset (visual);
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:
break;
case GST_STATE_CHANGE_READY_TO_NULL:
gst_visual_clear_actors (visual);
break;
default:
break;
}
return ret;
/* ERRORS */
no_actors:
{
GST_ELEMENT_ERROR (visual, LIBRARY, INIT, (NULL),
("could not create actors"));
gst_visual_clear_actors (visual);
return GST_STATE_CHANGE_FAILURE;
}
no_realize:
{
GST_ELEMENT_ERROR (visual, LIBRARY, INIT, (NULL),
("could not realize actor"));
gst_visual_clear_actors (visual);
return GST_STATE_CHANGE_FAILURE;
}
}
static void
make_valid_name (char *name)
{
/*
* Replace invalid chars with _ in the type name
*/
static const gchar extra_chars[] = "-_+";
gchar *p = name;
for (; *p; p++) {
int valid = ((p[0] >= 'A' && p[0] <= 'Z') ||
(p[0] >= 'a' && p[0] <= 'z') ||
(p[0] >= '0' && p[0] <= '9') || strchr (extra_chars, p[0]));
if (!valid)
*p = '_';
}
}
static gboolean
gst_visual_actor_plugin_is_gl (VisObject * plugin, const gchar * name)
{
gboolean is_gl;
gint depth;
#if !defined(VISUAL_API_VERSION)
depth = VISUAL_PLUGIN_ACTOR (plugin)->depth;
is_gl = (depth == VISUAL_VIDEO_DEPTH_GL);
#elif VISUAL_API_VERSION >= 4000 && VISUAL_API_VERSION < 5000
depth = VISUAL_ACTOR_PLUGIN (plugin)->vidoptions.depth;
/* FIXME: how to figure this out correctly in 0.4? */
is_gl = (depth & VISUAL_VIDEO_DEPTH_GL) == VISUAL_VIDEO_DEPTH_GL;
#else
# error what libvisual version is this?
#endif
if (!is_gl) {
GST_DEBUG ("plugin %s is not a GL plugin (%d), registering", name, depth);
} else {
GST_DEBUG ("plugin %s is a GL plugin (%d), ignoring", name, depth);
}
return is_gl;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
guint i, count;
VisList *list;
GST_DEBUG_CATEGORY_INIT (libvisual_debug, "libvisual", 0,
"libvisual audio visualisations");
#ifdef LIBVISUAL_PLUGINSBASEDIR
gst_plugin_add_dependency_simple (plugin, "HOME/.libvisual/actor",
LIBVISUAL_PLUGINSBASEDIR "/actor", NULL, GST_PLUGIN_DEPENDENCY_FLAG_NONE);
#endif
visual_log_set_verboseness (VISUAL_LOG_VERBOSENESS_LOW);
visual_log_set_info_handler (libvisual_log_handler, (void *) GST_LEVEL_INFO);
visual_log_set_warning_handler (libvisual_log_handler,
(void *) GST_LEVEL_WARNING);
visual_log_set_critical_handler (libvisual_log_handler,
(void *) GST_LEVEL_ERROR);
visual_log_set_error_handler (libvisual_log_handler,
(void *) GST_LEVEL_ERROR);
if (!visual_is_initialized ())
if (visual_init (NULL, NULL) != 0)
return FALSE;
list = visual_actor_get_list ();
#if !defined(VISUAL_API_VERSION)
count = visual_list_count (list);
#elif VISUAL_API_VERSION >= 4000 && VISUAL_API_VERSION < 5000
count = visual_collection_size (VISUAL_COLLECTION (list));
#endif
for (i = 0; i < count; i++) {
VisPluginRef *ref = visual_list_get (list, i);
VisPluginData *visplugin = NULL;
gboolean skip = FALSE;
GType type;
gchar *name;
GTypeInfo info = {
sizeof (GstVisualClass),
NULL,
NULL,
gst_visual_class_init,
NULL,
ref,
sizeof (GstVisual),
0,
NULL
};
visplugin = visual_plugin_load (ref);
if (ref->info->plugname == NULL)
continue;
/* Blacklist some plugins */
if (strcmp (ref->info->plugname, "gstreamer") == 0 ||
strcmp (ref->info->plugname, "gdkpixbuf") == 0) {
skip = TRUE;
} else {
/* Ignore plugins that only support GL output for now */
skip = gst_visual_actor_plugin_is_gl (visplugin->info->plugin,
visplugin->info->plugname);
}
visual_plugin_unload (visplugin);
if (!skip) {
name = g_strdup_printf ("GstVisual%s", ref->info->plugname);
make_valid_name (name);
type = g_type_register_static (GST_TYPE_VISUAL, name, &info, 0);
g_free (name);
name = g_strdup_printf ("libvisual_%s", ref->info->plugname);
make_valid_name (name);
if (!gst_element_register (plugin, name, GST_RANK_NONE, type)) {
g_free (name);
return FALSE;
}
g_free (name);
}
}
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"libvisual",
"libvisual visualization plugins",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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