/* 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) /* 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 */ GstAudioInfo info; /* framerate numerator & denominator */ gint fps_n; gint fps_d; gint width; gint height; GstClockTime duration; guint outsize; GstBufferPool *pool; /* 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_MAKE (" { " #if G_BYTE_ORDER == G_BIG_ENDIAN "\"xRGB\", " "\"RGB\", " #else "\"BGRx\", " "\"BGR\", " #endif "\"RGB16\" } ")) ); static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-raw, " "format = (string) " GST_AUDIO_NE (S16) ", " "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_finalize (GObject * object); static GstStateChangeReturn gst_visual_change_state (GstElement * element, GstStateChange transition); static GstFlowReturn gst_visual_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer); static gboolean gst_visual_sink_event (GstPad * pad, GstObject * parent, GstEvent * event); static gboolean gst_visual_src_event (GstPad * pad, GstObject * parent, GstEvent * event); static gboolean gst_visual_src_query (GstPad * pad, GstObject * parent, GstQuery * query); static gboolean gst_visual_sink_setcaps (GstPad * pad, GstCaps * caps); static GstCaps *gst_visual_getcaps (GstPad * pad, GstCaps * filter); 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 "); g_free (longname); } object->finalize = gst_visual_finalize; } 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_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_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_finalize (GObject * object) { GstVisual *visual = GST_VISUAL (object); g_object_unref (visual->adapter); if (visual->pool) gst_object_unref (visual->pool); gst_visual_clear_actors (visual); GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (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 * filter) { GstCaps *ret; GstVisual *visual = GST_VISUAL (GST_PAD_PARENT (pad)); int depths; if (!visual->actor) { ret = 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 */ #if G_BYTE_ORDER == G_BIG_ENDIAN gst_caps_append (ret, gst_caps_from_string (GST_VIDEO_CAPS_MAKE ("xRGB"))); #else gst_caps_append (ret, gst_caps_from_string (GST_VIDEO_CAPS_MAKE ("BGRx"))); #endif if (depths & VISUAL_VIDEO_DEPTH_24BIT) { #if G_BYTE_ORDER == G_BIG_ENDIAN gst_caps_append (ret, gst_caps_from_string (GST_VIDEO_CAPS_MAKE ("RGB"))); #else gst_caps_append (ret, gst_caps_from_string (GST_VIDEO_CAPS_MAKE ("BGR"))); #endif } if (depths & VISUAL_VIDEO_DEPTH_16BIT) { gst_caps_append (ret, gst_caps_from_string (GST_VIDEO_CAPS_MAKE ("RGB16"))); } beach: if (filter) { GstCaps *intersection; intersection = gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST); gst_caps_unref (ret); ret = intersection; } GST_DEBUG_OBJECT (visual, "returning caps %" GST_PTR_FORMAT, ret); return ret; } static gboolean gst_visual_src_setcaps (GstVisual * visual, GstCaps * caps) { gboolean res; GstStructure *structure; gint depth, pitch, rate; const gchar *fmt; 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 (!(fmt = gst_structure_get_string (structure, "format"))) goto error; if (!gst_structure_get_fraction (structure, "framerate", &visual->fps_n, &visual->fps_d)) goto error; if (!strcmp (fmt, "BGR") || !strcmp (fmt, "RGB")) depth = 24; else if (!strcmp (fmt, "BGRx") || !strcmp (fmt, "xRGB")) depth = 32; else depth = 16; 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); rate = GST_AUDIO_INFO_RATE (&visual->info); /* precalc some values */ visual->outsize = visual->video->height * pitch; visual->spf = gst_util_uint64_scale_int (rate, visual->fps_d, visual->fps_n); visual->duration = gst_util_uint64_scale_int (GST_SECOND, visual->fps_d, visual->fps_n); res = gst_pad_push_event (visual->srcpad, gst_event_new_caps (caps)); return res; /* ERRORS */ error: { GST_DEBUG_OBJECT (visual, "error parsing caps"); return FALSE; } } static gboolean gst_visual_sink_setcaps (GstPad * pad, GstCaps * caps) { GstVisual *visual = GST_VISUAL (GST_PAD_PARENT (pad)); GstAudioInfo info; gint rate; if (!gst_audio_info_from_caps (&info, caps)) goto invalid_caps; visual->info = info; rate = GST_AUDIO_INFO_RATE (&info); /* 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 (rate, visual->fps_d, visual->fps_n); } return TRUE; /* ERRORS */ invalid_caps: { GST_ERROR_OBJECT (visual, "invalid caps received"); return FALSE; } } static gboolean gst_vis_src_negotiate (GstVisual * visual) { GstCaps *othercaps, *target; GstStructure *structure; GstCaps *caps; GstQuery *query; GstBufferPool *pool = NULL; guint size, min, max, prefix, alignment; caps = gst_pad_query_caps (visual->srcpad, NULL); /* see what the peer can do */ othercaps = gst_pad_peer_query_caps (visual->srcpad, caps); if (othercaps) { target = othercaps; gst_caps_unref (caps); if (gst_caps_is_empty (target)) goto no_format; target = gst_caps_make_writable (target); gst_caps_truncate (target); } else { /* need a copy, we'll be modifying it when fixating */ target = gst_caps_copy (caps); gst_caps_unref (caps); } GST_DEBUG_OBJECT (visual, "before fixate caps %" GST_PTR_FORMAT, target); /* 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_caps_fixate (target); GST_DEBUG_OBJECT (visual, "after fixate caps %" GST_PTR_FORMAT, target); gst_visual_src_setcaps (visual, target); /* try to get a bufferpool now */ /* find a pool for the negotiated caps now */ query = gst_query_new_allocation (target, TRUE); if (gst_pad_peer_query (visual->srcpad, query)) { /* we got configuration from our peer, parse them */ gst_query_parse_allocation_params (query, &size, &min, &max, &prefix, &alignment, &pool); } else { size = visual->outsize; min = max = 0; prefix = 0; alignment = 0; } if (pool == NULL) { GstStructure *config; /* we did not get a pool, make one ourselves then */ pool = gst_buffer_pool_new (); config = gst_buffer_pool_get_config (pool); gst_buffer_pool_config_set (config, target, size, min, max, prefix, alignment); gst_buffer_pool_set_config (pool, config); } if (visual->pool) gst_object_unref (visual->pool); visual->pool = pool; /* and activate */ gst_buffer_pool_set_active (pool, TRUE); 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, GstObject * parent, GstEvent * event) { GstVisual *visual; gboolean res; visual = GST_VISUAL (parent); 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_CAPS: { GstCaps *caps; gst_event_parse_caps (event, &caps); res = gst_visual_sink_setcaps (pad, caps); gst_event_unref (event); break; } case GST_EVENT_SEGMENT: { /* 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_copy_segment (event, &visual->segment); /* and forward */ res = gst_pad_push_event (visual->srcpad, event); break; } default: res = gst_pad_event_default (pad, parent, event); break; } return res; } static gboolean gst_visual_src_event (GstPad * pad, GstObject * parent, GstEvent * event) { GstVisual *visual; gboolean res; visual = GST_VISUAL (parent); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_QOS: { gdouble proportion; GstClockTimeDiff diff; GstClockTime timestamp; gst_event_parse_qos (event, NULL, &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; } case GST_EVENT_RECONFIGURE: /* dont't forward */ gst_event_unref (event); res = TRUE; break; default: res = gst_pad_event_default (pad, parent, event); break; } return res; } static gboolean gst_visual_src_query (GstPad * pad, GstObject * parent, GstQuery * query) { gboolean res; GstVisual *visual; visual = GST_VISUAL (parent); 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 */ max_samples = MAX (VISUAL_SAMPLES, visual->spf); our_latency = gst_util_uint64_scale_int (max_samples, GST_SECOND, GST_AUDIO_INFO_RATE (&visual->info)); 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; } case GST_QUERY_CAPS: { GstCaps *filter, *caps; gst_query_parse_caps (query, &filter); caps = gst_visual_getcaps (pad, filter); gst_query_set_caps_result (query, caps); gst_caps_unref (caps); res = TRUE; } default: res = gst_pad_query_default (pad, parent, query); break; } return res; } /* Make sure we are negotiated */ static GstFlowReturn ensure_negotiated (GstVisual * visual) { gboolean reconfigure; reconfigure = gst_pad_check_reconfigure (visual->srcpad); /* we don't know an output format yet, pick one */ if (reconfigure || !gst_pad_has_current_caps (visual->srcpad)) { if (!gst_vis_src_negotiate (visual)) return GST_FLOW_NOT_NEGOTIATED; } return GST_FLOW_OK; } static GstFlowReturn gst_visual_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer) { GstBuffer *outbuf = NULL; guint i; GstVisual *visual = GST_VISUAL (parent); GstFlowReturn ret = GST_FLOW_OK; guint avail; gint bpf, rate, channels; GST_DEBUG_OBJECT (visual, "chain function called"); /* Make sure have an output format */ ret = ensure_negotiated (visual); 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); } rate = GST_AUDIO_INFO_RATE (&visual->info); bpf = GST_AUDIO_INFO_BPF (&visual->info); channels = GST_AUDIO_INFO_CHANNELS (&visual->info); GST_DEBUG_OBJECT (visual, "Input buffer has %" G_GSIZE_FORMAT " samples, time=%" G_GUINT64_FORMAT, gst_buffer_get_size (buffer) / bpf, 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 * bpf) break; /* we need at least enough samples to make one frame */ if (avail < visual->spf * bpf) 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 /= bpf; timestamp += gst_util_uint64_scale_int (dist, GST_SECOND, 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 * bpf); #if defined(VISUAL_API_VERSION) && VISUAL_API_VERSION >= 4000 && VISUAL_API_VERSION < 5000 { VisBuffer *lbuf, *rbuf; guint16 ldata[VISUAL_SAMPLES], rdata[VISUAL_SAMPLES]; VisAudioSampleRateType vrate; lbuf = visual_buffer_new_with_buffer (ldata, sizeof (ldata), NULL); rbuf = visual_buffer_new_with_buffer (rdata, sizeof (rdata), NULL); if (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 (rate) { case 8000: vrate = VISUAL_AUDIO_SAMPLE_RATE_8000; break; case 11250: vrate = VISUAL_AUDIO_SAMPLE_RATE_11250; break; case 22500: vrate = VISUAL_AUDIO_SAMPLE_RATE_22500; break; case 32000: vrate = VISUAL_AUDIO_SAMPLE_RATE_32000; break; case 44100: vrate = VISUAL_AUDIO_SAMPLE_RATE_44100; break; case 48000: vrate = VISUAL_AUDIO_SAMPLE_RATE_48000; break; case 96000: vrate = 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", rate); ret = GST_FLOW_ERROR; goto beach; break; } visual_audio_samplepool_input_channel (visual->audio->samplepool, lbuf, vrate, VISUAL_AUDIO_SAMPLE_FORMAT_S16, (char *) VISUAL_AUDIO_CHANNEL_LEFT); visual_audio_samplepool_input_channel (visual->audio->samplepool, rbuf, vrate, 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) { GST_DEBUG_OBJECT (visual, "allocating output buffer"); ret = gst_buffer_pool_acquire_buffer (visual->pool, &outbuf, NULL); if (ret != GST_FLOW_OK) { gst_adapter_unmap (visual->adapter); 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); 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 * bpf); /* quit the loop if something was wrong */ if (ret != GST_FLOW_OK) break; } beach: if (outbuf != NULL) gst_buffer_unref (outbuf); 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: if (visual->pool) { gst_buffer_pool_set_active (visual->pool, FALSE); gst_object_unref (visual->pool); visual->pool = NULL; } 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)