| /* gstmonoscope.c: implementation of monoscope drawing element |
| * Copyright (C) <2002> Richard Boulton <richard@tartarus.org> |
| * Copyright (C) <2006> Tim-Philipp Müller <tim centricular net> |
| * Copyright (C) <2006> Wim Taymans <wim at fluendo dot com> |
| * |
| * 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. |
| */ |
| |
| /** |
| * SECTION:element-monoscope |
| * @see_also: goom |
| * |
| * Monoscope is an audio visualisation element. It creates a coloured |
| * curve of the audio signal like on an oscilloscope. |
| * |
| * <refsect2> |
| * <title>Example launch line</title> |
| * |[ |
| * gst-launch-1.0 -v audiotestsrc ! audioconvert ! monoscope ! videoconvert ! ximagesink |
| * ]| |
| * </refsect2> |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <gst/video/video.h> |
| #include <gst/audio/audio.h> |
| #include <string.h> |
| #include "gstmonoscope.h" |
| #include "monoscope.h" |
| |
| GST_DEBUG_CATEGORY_STATIC (monoscope_debug); |
| #define GST_CAT_DEFAULT monoscope_debug |
| |
| #if G_BYTE_ORDER == G_BIG_ENDIAN |
| #define RGB_ORDER "xRGB" |
| #else |
| #define RGB_ORDER "BGRx" |
| #endif |
| |
| static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS ("video/x-raw, " |
| "format = (string) " RGB_ORDER ", " |
| "width = " G_STRINGIFY (scope_width) ", " |
| "height = " G_STRINGIFY (scope_height) ", " |
| "framerate = " GST_VIDEO_FPS_RANGE) |
| ); |
| |
| 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) ", " |
| "rate = (int) [ 8000, 96000 ], " |
| "channels = (int) 1, " "layout = (string) interleaved") |
| ); |
| |
| |
| #define gst_monoscope_parent_class parent_class |
| G_DEFINE_TYPE (GstMonoscope, gst_monoscope, GST_TYPE_ELEMENT); |
| |
| static void gst_monoscope_finalize (GObject * object); |
| static GstFlowReturn gst_monoscope_chain (GstPad * pad, GstObject * parent, |
| GstBuffer * buf); |
| static gboolean gst_monoscope_src_setcaps (GstMonoscope * mono, GstCaps * caps); |
| static gboolean gst_monoscope_sink_setcaps (GstMonoscope * mono, |
| GstCaps * caps); |
| static void gst_monoscope_reset (GstMonoscope * monoscope); |
| static gboolean gst_monoscope_sink_event (GstPad * pad, GstObject * parent, |
| GstEvent * event); |
| static gboolean gst_monoscope_src_event (GstPad * pad, GstObject * parent, |
| GstEvent * event); |
| static GstStateChangeReturn gst_monoscope_change_state (GstElement * element, |
| GstStateChange transition); |
| |
| static void |
| gst_monoscope_class_init (GstMonoscopeClass * klass) |
| { |
| GObjectClass *gobject_class; |
| GstElementClass *gstelement_class; |
| |
| gobject_class = (GObjectClass *) klass; |
| gstelement_class = (GstElementClass *) klass; |
| |
| gobject_class->finalize = gst_monoscope_finalize; |
| |
| gstelement_class->change_state = |
| GST_DEBUG_FUNCPTR (gst_monoscope_change_state); |
| |
| gst_element_class_add_static_pad_template (gstelement_class, &src_template); |
| gst_element_class_add_static_pad_template (gstelement_class, &sink_template); |
| gst_element_class_set_static_metadata (gstelement_class, "Monoscope", |
| "Visualization", |
| "Displays a highly stabilised waveform of audio input", |
| "Richard Boulton <richard@tartarus.org>"); |
| } |
| |
| static void |
| gst_monoscope_init (GstMonoscope * monoscope) |
| { |
| monoscope->sinkpad = |
| gst_pad_new_from_static_template (&sink_template, "sink"); |
| gst_pad_set_chain_function (monoscope->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_monoscope_chain)); |
| gst_pad_set_event_function (monoscope->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_monoscope_sink_event)); |
| gst_element_add_pad (GST_ELEMENT (monoscope), monoscope->sinkpad); |
| |
| monoscope->srcpad = gst_pad_new_from_static_template (&src_template, "src"); |
| gst_pad_set_event_function (monoscope->srcpad, |
| GST_DEBUG_FUNCPTR (gst_monoscope_src_event)); |
| gst_element_add_pad (GST_ELEMENT (monoscope), monoscope->srcpad); |
| |
| monoscope->adapter = gst_adapter_new (); |
| monoscope->next_ts = GST_CLOCK_TIME_NONE; |
| monoscope->bps = sizeof (gint16); |
| |
| /* reset the initial video state */ |
| monoscope->width = scope_width; |
| monoscope->height = scope_height; |
| monoscope->fps_num = 25; /* desired frame rate */ |
| monoscope->fps_denom = 1; |
| monoscope->visstate = NULL; |
| |
| /* reset the initial audio state */ |
| monoscope->rate = GST_AUDIO_DEF_RATE; |
| } |
| |
| static void |
| gst_monoscope_finalize (GObject * object) |
| { |
| GstMonoscope *monoscope = GST_MONOSCOPE (object); |
| |
| if (monoscope->visstate) |
| monoscope_close (monoscope->visstate); |
| |
| g_object_unref (monoscope->adapter); |
| |
| G_OBJECT_CLASS (parent_class)->finalize (object); |
| } |
| |
| static void |
| gst_monoscope_reset (GstMonoscope * monoscope) |
| { |
| monoscope->next_ts = GST_CLOCK_TIME_NONE; |
| |
| gst_adapter_clear (monoscope->adapter); |
| gst_segment_init (&monoscope->segment, GST_FORMAT_UNDEFINED); |
| monoscope->segment_pending = FALSE; |
| |
| GST_OBJECT_LOCK (monoscope); |
| monoscope->proportion = 1.0; |
| monoscope->earliest_time = -1; |
| GST_OBJECT_UNLOCK (monoscope); |
| } |
| |
| static gboolean |
| gst_monoscope_sink_setcaps (GstMonoscope * monoscope, GstCaps * caps) |
| { |
| GstStructure *structure; |
| |
| structure = gst_caps_get_structure (caps, 0); |
| |
| gst_structure_get_int (structure, "rate", &monoscope->rate); |
| |
| GST_DEBUG_OBJECT (monoscope, "sample rate = %d", monoscope->rate); |
| return TRUE; |
| } |
| |
| static gboolean |
| gst_monoscope_src_setcaps (GstMonoscope * monoscope, GstCaps * caps) |
| { |
| GstStructure *structure; |
| gboolean res; |
| |
| structure = gst_caps_get_structure (caps, 0); |
| |
| gst_structure_get_int (structure, "width", &monoscope->width); |
| gst_structure_get_int (structure, "height", &monoscope->height); |
| gst_structure_get_fraction (structure, "framerate", &monoscope->fps_num, |
| &monoscope->fps_denom); |
| |
| monoscope->outsize = monoscope->width * monoscope->height * 4; |
| monoscope->frame_duration = gst_util_uint64_scale_int (GST_SECOND, |
| monoscope->fps_denom, monoscope->fps_num); |
| monoscope->spf = |
| gst_util_uint64_scale_int (monoscope->rate, monoscope->fps_denom, |
| monoscope->fps_num); |
| |
| GST_DEBUG_OBJECT (monoscope, "dimension %dx%d, framerate %d/%d, spf %d", |
| monoscope->width, monoscope->height, monoscope->fps_num, |
| monoscope->fps_denom, monoscope->spf); |
| |
| if (monoscope->visstate) { |
| monoscope_close (monoscope->visstate); |
| monoscope->visstate = NULL; |
| } |
| |
| monoscope->visstate = monoscope_init (monoscope->width, monoscope->height); |
| |
| res = gst_pad_set_caps (monoscope->srcpad, caps); |
| |
| return res && (monoscope->visstate != NULL); |
| } |
| |
| static gboolean |
| gst_monoscope_src_negotiate (GstMonoscope * monoscope) |
| { |
| GstCaps *othercaps, *target; |
| GstStructure *structure; |
| GstCaps *templ; |
| GstQuery *query; |
| GstBufferPool *pool; |
| GstStructure *config; |
| guint size, min, max; |
| |
| templ = gst_pad_get_pad_template_caps (monoscope->srcpad); |
| |
| GST_DEBUG_OBJECT (monoscope, "performing negotiation"); |
| |
| /* see what the peer can do */ |
| othercaps = gst_pad_peer_query_caps (monoscope->srcpad, NULL); |
| if (othercaps) { |
| target = gst_caps_intersect (othercaps, templ); |
| gst_caps_unref (othercaps); |
| gst_caps_unref (templ); |
| |
| if (gst_caps_is_empty (target)) |
| goto no_format; |
| |
| target = gst_caps_truncate (target); |
| } else { |
| target = templ; |
| } |
| |
| target = gst_caps_make_writable (target); |
| 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", 25, 1); |
| if (gst_structure_has_field (structure, "pixel-aspect-ratio")) |
| gst_structure_fixate_field_nearest_fraction (structure, |
| "pixel-aspect-ratio", 1, 1); |
| target = gst_caps_fixate (target); |
| |
| gst_monoscope_src_setcaps (monoscope, 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 (monoscope->srcpad, query)) { |
| } |
| |
| if (gst_query_get_n_allocation_pools (query) > 0) { |
| /* we got configuration from our peer, parse them */ |
| gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max); |
| } else { |
| pool = NULL; |
| size = monoscope->outsize; |
| min = max = 0; |
| } |
| |
| if (pool == NULL) { |
| /* 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_params (config, target, size, min, max); |
| gst_buffer_pool_set_config (pool, config); |
| |
| if (monoscope->pool) { |
| gst_buffer_pool_set_active (monoscope->pool, TRUE); |
| gst_object_unref (monoscope->pool); |
| } |
| monoscope->pool = pool; |
| |
| /* and activate */ |
| gst_buffer_pool_set_active (pool, TRUE); |
| |
| gst_query_unref (query); |
| gst_caps_unref (target); |
| |
| return TRUE; |
| |
| no_format: |
| { |
| gst_caps_unref (target); |
| return FALSE; |
| } |
| } |
| |
| /* make sure we are negotiated */ |
| static GstFlowReturn |
| ensure_negotiated (GstMonoscope * monoscope) |
| { |
| gboolean reconfigure; |
| |
| reconfigure = gst_pad_check_reconfigure (monoscope->srcpad); |
| |
| /* we don't know an output format yet, pick one */ |
| if (reconfigure || !gst_pad_has_current_caps (monoscope->srcpad)) { |
| if (!gst_monoscope_src_negotiate (monoscope)) { |
| gst_pad_mark_reconfigure (monoscope->srcpad); |
| if (GST_PAD_IS_FLUSHING (monoscope->srcpad)) |
| return GST_FLOW_FLUSHING; |
| else |
| return GST_FLOW_NOT_NEGOTIATED; |
| } |
| } |
| return GST_FLOW_OK; |
| } |
| |
| static GstFlowReturn |
| gst_monoscope_chain (GstPad * pad, GstObject * parent, GstBuffer * inbuf) |
| { |
| GstFlowReturn flow_ret = GST_FLOW_OK; |
| GstMonoscope *monoscope; |
| |
| monoscope = GST_MONOSCOPE (parent); |
| |
| if (monoscope->rate == 0) { |
| gst_buffer_unref (inbuf); |
| flow_ret = GST_FLOW_NOT_NEGOTIATED; |
| goto out; |
| } |
| |
| /* Make sure have an output format */ |
| flow_ret = ensure_negotiated (monoscope); |
| if (flow_ret != GST_FLOW_OK) { |
| gst_buffer_unref (inbuf); |
| goto out; |
| } |
| |
| if (monoscope->segment_pending) { |
| gst_pad_push_event (monoscope->srcpad, |
| gst_event_new_segment (&monoscope->segment)); |
| monoscope->segment_pending = FALSE; |
| } |
| |
| /* don't try to combine samples from discont buffer */ |
| if (GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_DISCONT)) { |
| gst_adapter_clear (monoscope->adapter); |
| monoscope->next_ts = GST_CLOCK_TIME_NONE; |
| } |
| |
| /* Match timestamps from the incoming audio */ |
| if (GST_BUFFER_TIMESTAMP (inbuf) != GST_CLOCK_TIME_NONE) |
| monoscope->next_ts = GST_BUFFER_TIMESTAMP (inbuf); |
| |
| GST_LOG_OBJECT (monoscope, |
| "in buffer has %" G_GSIZE_FORMAT " samples, ts=%" GST_TIME_FORMAT, |
| gst_buffer_get_size (inbuf) / monoscope->bps, |
| GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (inbuf))); |
| |
| gst_adapter_push (monoscope->adapter, inbuf); |
| inbuf = NULL; |
| |
| /* Collect samples until we have enough for an output frame */ |
| while (flow_ret == GST_FLOW_OK) { |
| gint16 *samples; |
| GstBuffer *outbuf = NULL; |
| guint32 *pixels, avail, bytesperframe; |
| |
| avail = gst_adapter_available (monoscope->adapter); |
| GST_LOG_OBJECT (monoscope, "bytes avail now %u", avail); |
| |
| bytesperframe = monoscope->spf * monoscope->bps; |
| if (avail < bytesperframe) |
| break; |
| |
| /* FIXME: something is wrong with QoS, we are skipping way too much |
| * stuff even with very low CPU loads */ |
| #if 0 |
| if (monoscope->next_ts != -1) { |
| gboolean need_skip; |
| gint64 qostime; |
| |
| qostime = gst_segment_to_running_time (&monoscope->segment, |
| GST_FORMAT_TIME, monoscope->next_ts); |
| |
| GST_OBJECT_LOCK (monoscope); |
| /* check for QoS, don't compute buffers that are known to be late */ |
| need_skip = |
| GST_CLOCK_TIME_IS_VALID (monoscope->earliest_time) && |
| qostime <= monoscope->earliest_time; |
| GST_OBJECT_UNLOCK (monoscope); |
| |
| if (need_skip) { |
| GST_WARNING_OBJECT (monoscope, |
| "QoS: skip ts: %" GST_TIME_FORMAT ", earliest: %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (qostime), GST_TIME_ARGS (monoscope->earliest_time)); |
| goto skip; |
| } |
| } |
| #endif |
| |
| samples = (gint16 *) gst_adapter_map (monoscope->adapter, bytesperframe); |
| |
| if (monoscope->spf < convolver_big) { |
| gint16 in_data[convolver_big], i; |
| gdouble scale = (gdouble) monoscope->spf / (gdouble) convolver_big; |
| |
| for (i = 0; i < convolver_big; ++i) { |
| gdouble off = (gdouble) i * scale; |
| in_data[i] = samples[MIN ((guint) off, monoscope->spf)]; |
| } |
| pixels = monoscope_update (monoscope->visstate, in_data); |
| } else { |
| /* not really correct, but looks much prettier */ |
| pixels = monoscope_update (monoscope->visstate, samples); |
| } |
| |
| GST_LOG_OBJECT (monoscope, "allocating output buffer"); |
| flow_ret = gst_buffer_pool_acquire_buffer (monoscope->pool, &outbuf, NULL); |
| if (flow_ret != GST_FLOW_OK) { |
| gst_adapter_unmap (monoscope->adapter); |
| goto out; |
| } |
| |
| gst_buffer_fill (outbuf, 0, pixels, monoscope->outsize); |
| |
| GST_BUFFER_TIMESTAMP (outbuf) = monoscope->next_ts; |
| GST_BUFFER_DURATION (outbuf) = monoscope->frame_duration; |
| |
| flow_ret = gst_pad_push (monoscope->srcpad, outbuf); |
| |
| #if 0 |
| skip: |
| #endif |
| |
| if (GST_CLOCK_TIME_IS_VALID (monoscope->next_ts)) |
| monoscope->next_ts += monoscope->frame_duration; |
| |
| gst_adapter_flush (monoscope->adapter, bytesperframe); |
| } |
| |
| out: |
| |
| return flow_ret; |
| } |
| |
| static gboolean |
| gst_monoscope_sink_event (GstPad * pad, GstObject * parent, GstEvent * event) |
| { |
| GstMonoscope *monoscope; |
| gboolean res; |
| |
| monoscope = GST_MONOSCOPE (parent); |
| |
| switch (GST_EVENT_TYPE (event)) { |
| case GST_EVENT_FLUSH_START: |
| res = gst_pad_push_event (monoscope->srcpad, event); |
| break; |
| case GST_EVENT_FLUSH_STOP: |
| gst_monoscope_reset (monoscope); |
| res = gst_pad_push_event (monoscope->srcpad, 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, &monoscope->segment); |
| |
| /* We forward the event from the chain function after caps are |
| * negotiated. Otherwise we would potentially break the event order and |
| * send the segment event before the caps event */ |
| monoscope->segment_pending = TRUE; |
| gst_event_unref (event); |
| res = TRUE; |
| break; |
| } |
| case GST_EVENT_CAPS: |
| { |
| GstCaps *caps; |
| |
| gst_event_parse_caps (event, &caps); |
| gst_monoscope_sink_setcaps (monoscope, caps); |
| gst_event_unref (event); |
| res = TRUE; |
| break; |
| } |
| default: |
| res = gst_pad_push_event (monoscope->srcpad, event); |
| break; |
| } |
| |
| return res; |
| } |
| |
| static gboolean |
| gst_monoscope_src_event (GstPad * pad, GstObject * parent, GstEvent * event) |
| { |
| GstMonoscope *monoscope; |
| gboolean res; |
| |
| monoscope = GST_MONOSCOPE (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 (monoscope); |
| monoscope->proportion = proportion; |
| if (diff >= 0) |
| /* we're late, this is a good estimate for next displayable |
| * frame (see part-qos.txt) */ |
| monoscope->earliest_time = |
| timestamp + 2 * diff + monoscope->frame_duration; |
| else |
| monoscope->earliest_time = timestamp + diff; |
| GST_OBJECT_UNLOCK (monoscope); |
| |
| res = gst_pad_push_event (monoscope->sinkpad, event); |
| break; |
| } |
| default: |
| res = gst_pad_push_event (monoscope->sinkpad, event); |
| break; |
| } |
| |
| return res; |
| } |
| |
| static GstStateChangeReturn |
| gst_monoscope_change_state (GstElement * element, GstStateChange transition) |
| { |
| GstMonoscope *monoscope = GST_MONOSCOPE (element); |
| GstStateChangeReturn ret; |
| |
| switch (transition) { |
| case GST_STATE_CHANGE_NULL_TO_READY: |
| break; |
| case GST_STATE_CHANGE_READY_TO_PAUSED: |
| gst_monoscope_reset (monoscope); |
| break; |
| default: |
| break; |
| } |
| |
| ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); |
| |
| switch (transition) { |
| case GST_STATE_CHANGE_PAUSED_TO_READY: |
| if (monoscope->pool) { |
| gst_buffer_pool_set_active (monoscope->pool, FALSE); |
| gst_object_replace ((GstObject **) & monoscope->pool, NULL); |
| } |
| break; |
| case GST_STATE_CHANGE_READY_TO_NULL: |
| break; |
| default: |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static gboolean |
| plugin_init (GstPlugin * plugin) |
| { |
| GST_DEBUG_CATEGORY_INIT (monoscope_debug, "monoscope", 0, |
| "monoscope element"); |
| |
| return gst_element_register (plugin, "monoscope", |
| GST_RANK_NONE, GST_TYPE_MONOSCOPE); |
| } |
| |
| GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, |
| GST_VERSION_MINOR, |
| monoscope, |
| "Monoscope visualization", |
| plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN); |