diff -r 567bb019e3e3 -r 7e817e7e631c gst_plugins_base/ext/libvisual/visual.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gst_plugins_base/ext/libvisual/visual.c Wed Sep 01 12:16:41 2010 +0100 @@ -0,0 +1,957 @@ +/* GStreamer + * Copyright (C) 2004 Benjamin Otte + * + * 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 +#include +#include +#include +#include + +#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) + +struct _GstVisual +{ + GstElement element; + + /* pads */ + GstPad *sinkpad; + GstPad *srcpad; + GstClockTime next_ts; + 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_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 { + GstElementDetails details = { + NULL, + "Visualization", + klass->plugin->info->about, + "Benjamin Otte " + }; + + details.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 (element, &details); + g_free (details.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_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) +{ + visual->next_ts = -1; + 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, *intersect; + 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) { + intersect = gst_caps_intersect (othercaps, caps); + gst_caps_unref (othercaps); + gst_caps_unref (caps); + + if (gst_caps_is_empty (intersect)) + goto no_format; + + target = gst_caps_copy_nth (intersect, 0); + gst_caps_unref (intersect); + } 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 + * 320x240x30 by convention. */ + structure = gst_caps_get_structure (target, 0); + gst_structure_fixate_field_nearest_int (structure, "width", 320); + gst_structure_fixate_field_nearest_int (structure, "height", 240); + gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1); + + 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 (intersect); + 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, ×tamp); + + /* 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; +} + +/* 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); + visual->next_ts = -1; + } + + /* Match timestamps from the incoming audio */ + if (GST_BUFFER_TIMESTAMP (buffer) != GST_CLOCK_TIME_NONE) + visual->next_ts = GST_BUFFER_TIMESTAMP (buffer); + + GST_DEBUG_OBJECT (visual, + "Input buffer has %d samples, time=%" G_GUINT64_FORMAT, + GST_BUFFER_SIZE (buffer) / visual->bps, GST_BUFFER_TIMESTAMP (buffer)); + + gst_adapter_push (visual->adapter, buffer); + + while (TRUE) { + gboolean need_skip; + const guint16 *data; + + GST_DEBUG_OBJECT (visual, "processing buffer"); + + avail = gst_adapter_available (visual->adapter); + GST_DEBUG_OBJECT (visual, "avail now %u", avail); + + /* we need at least 512 samples */ + if (avail < 512 * visual->bps) + break; + + /* we need at least enough samples to make one frame */ + if (avail < visual->spf * visual->bps) + break; + + if (visual->next_ts != -1) { + gint64 qostime; + + /* QoS is done on running time */ + qostime = gst_segment_to_running_time (&visual->segment, GST_FORMAT_TIME, + visual->next_ts); + + 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 512 samples per channel */ + data = + (const guint16 *) gst_adapter_peek (visual->adapter, 512 * visual->bps); + +#if defined(VISUAL_API_VERSION) && VISUAL_API_VERSION >= 4000 && VISUAL_API_VERSION < 5000 + { + VisBuffer *lbuf, *rbuf; + guint16 ldata[512], rdata[512]; + 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 < 512; i++) { + ldata[i] = *data++; + rdata[i] = *data++; + } + } else { + for (i = 0; i < 512; 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, VISUAL_AUDIO_CHANNEL_LEFT); + visual_audio_samplepool_input_channel (visual->audio->samplepool, + rbuf, + rate, VISUAL_AUDIO_SAMPLE_FORMAT_S16, 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 < 512; i++) { + visual->audio->plugpcm[0][i] = *data++; + visual->audio->plugpcm[1][i] = *data++; + } + } else { + for (i = 0; i < 512; 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) { + goto beach; + } + } + visual_video_set_buffer (visual->video, GST_BUFFER_DATA (outbuf)); + visual_audio_analyze (visual->audio); + visual_actor_run (visual->actor, visual->audio); + visual_video_set_buffer (visual->video, NULL); + GST_DEBUG_OBJECT (visual, "rendered one frame"); + + GST_BUFFER_TIMESTAMP (outbuf) = visual->next_ts; + GST_BUFFER_DURATION (outbuf) = visual->duration; + + ret = gst_pad_push (visual->srcpad, outbuf); + outbuf = NULL; + + skip: + /* interpollate next timestamp */ + if (visual->next_ts != -1) + visual->next_ts += visual->duration; + + 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"); + + 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)