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Diffstat (limited to 'gst/volume/gstvolume.c')
| -rw-r--r-- | gst/volume/gstvolume.c | 858 |
1 files changed, 0 insertions, 858 deletions
diff --git a/gst/volume/gstvolume.c b/gst/volume/gstvolume.c deleted file mode 100644 index f859c958..00000000 --- a/gst/volume/gstvolume.c +++ /dev/null @@ -1,858 +0,0 @@ -/* -*- c-basic-offset: 2 -*- - * vi:si:et:sw=2:sts=8:ts=8:expandtab - * - * GStreamer - * Copyright (C) 1999-2001 Erik Walthinsen <omega@cse.ogi.edu> - * Copyright (C) 2005 Andy Wingo <wingo@pobox.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., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -/** - * SECTION:element-volume - * - * The volume element changes the volume of the audio data. - * - * <refsect2> - * <title>Example launch line</title> - * |[ - * gst-launch -v -m audiotestsrc ! volume volume=0.5 ! level ! fakesink silent=TRUE - * ]| This pipeline shows that the level of audiotestsrc has been halved - * (peak values are around -6 dB and RMS around -9 dB) compared to - * the same pipeline without the volume element. - * </refsect2> - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include <string.h> -#include <gst/gst.h> -#include <gst/base/gstbasetransform.h> -#include <gst/audio/audio.h> -#include <gst/interfaces/mixer.h> -#include <gst/controller/gstcontroller.h> -#include <gst/audio/audio.h> -#include <gst/audio/gstaudiofilter.h> -#include <liboil/liboil.h> - -#include "gstvolume.h" - -/* some defines for audio processing */ -/* the volume factor is a range from 0.0 to (arbitrary) VOLUME_MAX_DOUBLE = 10.0 - * we map 1.0 to VOLUME_UNITY_INT* - */ -#define VOLUME_UNITY_INT8 32 /* internal int for unity 2^(8-3) */ -#define VOLUME_UNITY_INT8_BIT_SHIFT 5 /* number of bits to shift for unity */ -#define VOLUME_UNITY_INT16 8192 /* internal int for unity 2^(16-3) */ -#define VOLUME_UNITY_INT16_BIT_SHIFT 13 /* number of bits to shift for unity */ -#define VOLUME_UNITY_INT24 2097152 /* internal int for unity 2^(24-3) */ -#define VOLUME_UNITY_INT24_BIT_SHIFT 21 /* number of bits to shift for unity */ -#define VOLUME_UNITY_INT32 134217728 /* internal int for unity 2^(32-5) */ -#define VOLUME_UNITY_INT32_BIT_SHIFT 27 -#define VOLUME_MAX_DOUBLE 10.0 -#define VOLUME_MAX_INT8 G_MAXINT8 -#define VOLUME_MIN_INT8 G_MININT8 -#define VOLUME_MAX_INT16 G_MAXINT16 -#define VOLUME_MIN_INT16 G_MININT16 -#define VOLUME_MAX_INT24 8388607 -#define VOLUME_MIN_INT24 -8388608 -#define VOLUME_MAX_INT32 G_MAXINT32 -#define VOLUME_MIN_INT32 G_MININT32 - -/* number of steps we use for the mixer interface to go from 0.0 to 1.0 */ -# define VOLUME_STEPS 100 - -#define GST_CAT_DEFAULT gst_volume_debug -GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT); - -/* Filter signals and args */ -enum -{ - /* FILL ME */ - LAST_SIGNAL -}; - -#define DEFAULT_PROP_MUTE FALSE -#define DEFAULT_PROP_VOLUME 1.0 - -enum -{ - PROP_0, - PROP_MUTE, - PROP_VOLUME -}; - -#define ALLOWED_CAPS \ - "audio/x-raw-float, " \ - "rate = (int) [ 1, MAX ], " \ - "channels = (int) [ 1, MAX ], " \ - "endianness = (int) BYTE_ORDER, " \ - "width = (int) {32, 64}; " \ - "audio/x-raw-int, " \ - "channels = (int) [ 1, MAX ], " \ - "rate = (int) [ 1, MAX ], " \ - "endianness = (int) BYTE_ORDER, " \ - "width = (int) 8, " \ - "depth = (int) 8, " \ - "signed = (bool) TRUE; " \ - "audio/x-raw-int, " \ - "channels = (int) [ 1, MAX ], " \ - "rate = (int) [ 1, MAX ], " \ - "endianness = (int) BYTE_ORDER, " \ - "width = (int) 16, " \ - "depth = (int) 16, " \ - "signed = (bool) TRUE; " \ - "audio/x-raw-int, " \ - "channels = (int) [ 1, MAX ], " \ - "rate = (int) [ 1, MAX ], " \ - "endianness = (int) BYTE_ORDER, " \ - "width = (int) 24, " \ - "depth = (int) 24, " \ - "signed = (bool) TRUE; " \ - "audio/x-raw-int, " \ - "channels = (int) [ 1, MAX ], " \ - "rate = (int) [ 1, MAX ], " \ - "endianness = (int) BYTE_ORDER, " \ - "width = (int) 32, " \ - "depth = (int) 32, " \ - "signed = (bool) TRUE" - -static void gst_volume_interface_init (GstImplementsInterfaceClass * klass); -static void gst_volume_mixer_init (GstMixerClass * iface); - -#define _init_interfaces(type) \ - { \ - static const GInterfaceInfo voliface_info = { \ - (GInterfaceInitFunc) gst_volume_interface_init, \ - NULL, \ - NULL \ - }; \ - static const GInterfaceInfo volmixer_info = { \ - (GInterfaceInitFunc) gst_volume_mixer_init, \ - NULL, \ - NULL \ - }; \ - static const GInterfaceInfo svol_info = { \ - NULL, \ - NULL, \ - NULL \ - }; \ - \ - g_type_add_interface_static (type, GST_TYPE_IMPLEMENTS_INTERFACE, \ - &voliface_info); \ - g_type_add_interface_static (type, GST_TYPE_MIXER, &volmixer_info); \ - g_type_add_interface_static (type, GST_TYPE_STREAM_VOLUME, &svol_info); \ - } - -GST_BOILERPLATE_FULL (GstVolume, gst_volume, GstAudioFilter, - GST_TYPE_AUDIO_FILTER, _init_interfaces); - -static void volume_set_property (GObject * object, guint prop_id, - const GValue * value, GParamSpec * pspec); -static void volume_get_property (GObject * object, guint prop_id, - GValue * value, GParamSpec * pspec); - -static void volume_before_transform (GstBaseTransform * base, - GstBuffer * buffer); -static GstFlowReturn volume_transform_ip (GstBaseTransform * base, - GstBuffer * outbuf); -static gboolean volume_setup (GstAudioFilter * filter, - GstRingBufferSpec * format); - -static void volume_process_double (GstVolume * self, gpointer bytes, - guint n_bytes); -static void volume_process_float (GstVolume * self, gpointer bytes, - guint n_bytes); -static void volume_process_int32 (GstVolume * self, gpointer bytes, - guint n_bytes); -static void volume_process_int32_clamp (GstVolume * self, gpointer bytes, - guint n_bytes); -static void volume_process_int24 (GstVolume * self, gpointer bytes, - guint n_bytes); -static void volume_process_int24_clamp (GstVolume * self, gpointer bytes, - guint n_bytes); -static void volume_process_int16 (GstVolume * self, gpointer bytes, - guint n_bytes); -static void volume_process_int16_clamp (GstVolume * self, gpointer bytes, - guint n_bytes); -static void volume_process_int8 (GstVolume * self, gpointer bytes, - guint n_bytes); -static void volume_process_int8_clamp (GstVolume * self, gpointer bytes, - guint n_bytes); - - -/* helper functions */ - -static gboolean -volume_choose_func (GstVolume * self) -{ - self->process = NULL; - - if (GST_AUDIO_FILTER (self)->format.caps == NULL) - return FALSE; - - switch (GST_AUDIO_FILTER (self)->format.type) { - case GST_BUFTYPE_LINEAR: - switch (GST_AUDIO_FILTER (self)->format.width) { - case 32: - /* only clamp if the gain is greater than 1.0 - * FIXME: current_vol_i can change while processing the buffer! - */ - if (self->current_vol_i32 > VOLUME_UNITY_INT32) - self->process = volume_process_int32_clamp; - else - self->process = volume_process_int32; - break; - case 24: - /* only clamp if the gain is greater than 1.0 - * FIXME: current_vol_i can change while processing the buffer! - */ - if (self->current_vol_i24 > VOLUME_UNITY_INT24) - self->process = volume_process_int24_clamp; - else - self->process = volume_process_int24; - break; - case 16: - /* only clamp if the gain is greater than 1.0 - * FIXME: current_vol_i can change while processing the buffer! - */ - if (self->current_vol_i16 > VOLUME_UNITY_INT16) - self->process = volume_process_int16_clamp; - else - self->process = volume_process_int16; - break; - case 8: - /* only clamp if the gain is greater than 1.0 - * FIXME: current_vol_i can change while processing the buffer! - */ - if (self->current_vol_i16 > VOLUME_UNITY_INT8) - self->process = volume_process_int8_clamp; - else - self->process = volume_process_int8; - break; - } - break; - case GST_BUFTYPE_FLOAT: - switch (GST_AUDIO_FILTER (self)->format.width) { - case 32: - self->process = volume_process_float; - break; - case 64: - self->process = volume_process_double; - break; - } - break; - default: - break; - } - - return (self->process != NULL); -} - -static gboolean -volume_update_volume (GstVolume * self, gfloat volume, gboolean mute) -{ - gboolean passthrough; - gboolean res; - - GST_DEBUG_OBJECT (self, "configure mute %d, volume %f", mute, volume); - - if (mute) { - self->current_mute = TRUE; - self->current_volume = 0.0; - - self->current_vol_i8 = 0; - self->current_vol_i16 = 0; - self->current_vol_i24 = 0; - self->current_vol_i32 = 0; - - passthrough = FALSE; - } else { - self->current_mute = FALSE; - self->current_volume = volume; - - self->current_vol_i8 = volume * VOLUME_UNITY_INT8; - self->current_vol_i16 = volume * VOLUME_UNITY_INT16; - self->current_vol_i24 = volume * VOLUME_UNITY_INT24; - self->current_vol_i32 = volume * VOLUME_UNITY_INT32; - - passthrough = (self->current_vol_i16 == VOLUME_UNITY_INT16); - } - - GST_DEBUG_OBJECT (self, "set passthrough %d", passthrough); - - gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (self), passthrough); - - res = self->negotiated = volume_choose_func (self); - - return res; -} - -/* Mixer interface */ - -static gboolean -gst_volume_interface_supported (GstImplementsInterface * iface, GType type) -{ - return (type == GST_TYPE_MIXER || type == GST_TYPE_STREAM_VOLUME); -} - -static void -gst_volume_interface_init (GstImplementsInterfaceClass * klass) -{ - klass->supported = gst_volume_interface_supported; -} - -static const GList * -gst_volume_list_tracks (GstMixer * mixer) -{ - GstVolume *self = GST_VOLUME (mixer); - - g_return_val_if_fail (self != NULL, NULL); - g_return_val_if_fail (GST_IS_VOLUME (self), NULL); - - return self->tracklist; -} - -static void -gst_volume_set_volume (GstMixer * mixer, GstMixerTrack * track, gint * volumes) -{ - GstVolume *self = GST_VOLUME (mixer); - - g_return_if_fail (self != NULL); - g_return_if_fail (GST_IS_VOLUME (self)); - - GST_OBJECT_LOCK (self); - self->volume = (gfloat) volumes[0] / VOLUME_STEPS; - GST_OBJECT_UNLOCK (self); -} - -static void -gst_volume_get_volume (GstMixer * mixer, GstMixerTrack * track, gint * volumes) -{ - GstVolume *self = GST_VOLUME (mixer); - - g_return_if_fail (self != NULL); - g_return_if_fail (GST_IS_VOLUME (self)); - - GST_OBJECT_LOCK (self); - volumes[0] = (gint) self->volume * VOLUME_STEPS; - GST_OBJECT_UNLOCK (self); -} - -static void -gst_volume_set_mute (GstMixer * mixer, GstMixerTrack * track, gboolean mute) -{ - GstVolume *self = GST_VOLUME (mixer); - - g_return_if_fail (self != NULL); - g_return_if_fail (GST_IS_VOLUME (self)); - - GST_OBJECT_LOCK (self); - self->mute = mute; - GST_OBJECT_UNLOCK (self); -} - -static void -gst_volume_mixer_init (GstMixerClass * klass) -{ - GST_MIXER_TYPE (klass) = GST_MIXER_SOFTWARE; - - /* default virtual functions */ - klass->list_tracks = gst_volume_list_tracks; - klass->set_volume = gst_volume_set_volume; - klass->get_volume = gst_volume_get_volume; - klass->set_mute = gst_volume_set_mute; -} - -/* Element class */ - -static void -gst_volume_dispose (GObject * object) -{ - GstVolume *volume = GST_VOLUME (object); - - if (volume->tracklist) { - if (volume->tracklist->data) - g_object_unref (volume->tracklist->data); - g_list_free (volume->tracklist); - volume->tracklist = NULL; - } - - G_OBJECT_CLASS (parent_class)->dispose (object); -} - -static void -gst_volume_base_init (gpointer g_class) -{ - GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); - GstAudioFilterClass *filter_class = GST_AUDIO_FILTER_CLASS (g_class); - GstCaps *caps; - - gst_element_class_set_details_simple (element_class, "Volume", - "Filter/Effect/Audio", - "Set volume on audio/raw streams", "Andy Wingo <wingo@pobox.com>"); - - caps = gst_caps_from_string (ALLOWED_CAPS); - gst_audio_filter_class_add_pad_templates (filter_class, caps); - gst_caps_unref (caps); -} - -static void -gst_volume_class_init (GstVolumeClass * klass) -{ - GObjectClass *gobject_class; - GstBaseTransformClass *trans_class; - GstAudioFilterClass *filter_class; - - gobject_class = (GObjectClass *) klass; - trans_class = (GstBaseTransformClass *) klass; - filter_class = (GstAudioFilterClass *) (klass); - - gobject_class->set_property = volume_set_property; - gobject_class->get_property = volume_get_property; - gobject_class->dispose = gst_volume_dispose; - - g_object_class_install_property (gobject_class, PROP_MUTE, - g_param_spec_boolean ("mute", "Mute", "mute channel", - DEFAULT_PROP_MUTE, - G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); - - g_object_class_install_property (gobject_class, PROP_VOLUME, - g_param_spec_double ("volume", "Volume", "volume factor, 1.0=100%", - 0.0, VOLUME_MAX_DOUBLE, DEFAULT_PROP_VOLUME, - G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); - - trans_class->before_transform = GST_DEBUG_FUNCPTR (volume_before_transform); - trans_class->transform_ip = GST_DEBUG_FUNCPTR (volume_transform_ip); - filter_class->setup = GST_DEBUG_FUNCPTR (volume_setup); -} - -static void -gst_volume_init (GstVolume * self, GstVolumeClass * g_class) -{ - GstMixerTrack *track = NULL; - - self->mute = DEFAULT_PROP_MUTE;; - self->volume = DEFAULT_PROP_VOLUME; - - self->tracklist = NULL; - self->negotiated = FALSE; - - track = g_object_new (GST_TYPE_MIXER_TRACK, NULL); - - if (GST_IS_MIXER_TRACK (track)) { - track->label = g_strdup ("volume"); - track->num_channels = 1; - track->min_volume = 0; - track->max_volume = VOLUME_STEPS; - track->flags = GST_MIXER_TRACK_SOFTWARE; - self->tracklist = g_list_append (self->tracklist, track); - } - - gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM (self), TRUE); -} - -static void -volume_process_double (GstVolume * self, gpointer bytes, guint n_bytes) -{ - gdouble *data = (gdouble *) bytes; - guint num_samples = n_bytes / sizeof (gdouble); - - gdouble vol = self->current_volume; - - oil_scalarmultiply_f64_ns (data, data, &vol, num_samples); -} - -static void -volume_process_float (GstVolume * self, gpointer bytes, guint n_bytes) -{ - gfloat *data = (gfloat *) bytes; - guint num_samples = n_bytes / sizeof (gfloat); - -#if 0 - guint i; - - for (i = 0; i < num_samples; i++) { - *data++ *= self->real_vol_f; - } - /* time "gst-launch 2>/dev/null audiotestsrc wave=7 num-buffers=10000 ! audio/x-raw-float ! - * volume volume=1.5 ! fakesink" goes from 0m0.850s -> 0m0.717s with liboil - */ -#endif - oil_scalarmultiply_f32_ns (data, data, &self->current_volume, num_samples); -} - -static void -volume_process_int32 (GstVolume * self, gpointer bytes, guint n_bytes) -{ - gint *data = (gint *) bytes; - guint i, num_samples; - gint64 val; - - num_samples = n_bytes / sizeof (gint); - for (i = 0; i < num_samples; i++) { - /* we use bitshifting instead of dividing by UNITY_INT for speed */ - val = (gint64) * data; - val = - (((gint64) self->current_vol_i32 * - val) >> VOLUME_UNITY_INT32_BIT_SHIFT); - *data++ = (gint32) val; - } -} - -static void -volume_process_int32_clamp (GstVolume * self, gpointer bytes, guint n_bytes) -{ - gint *data = (gint *) bytes; - guint i, num_samples; - gint64 val; - - num_samples = n_bytes / sizeof (gint); - - for (i = 0; i < num_samples; i++) { - /* we use bitshifting instead of dividing by UNITY_INT for speed */ - val = (gint64) * data; - val = - (((gint64) self->current_vol_i32 * - val) >> VOLUME_UNITY_INT32_BIT_SHIFT); - *data++ = (gint32) CLAMP (val, VOLUME_MIN_INT32, VOLUME_MAX_INT32); - } -} - -#if (G_BYTE_ORDER == G_LITTLE_ENDIAN) -#define get_unaligned_i24(_x) ( (((guint8*)_x)[0]) | ((((guint8*)_x)[1]) << 8) | ((((gint8*)_x)[2]) << 16) ) - -#define write_unaligned_u24(_x,samp) \ -G_STMT_START { \ - *(_x)++ = samp & 0xFF; \ - *(_x)++ = (samp >> 8) & 0xFF; \ - *(_x)++ = (samp >> 16) & 0xFF; \ -} G_STMT_END - -#else /* BIG ENDIAN */ -#define get_unaligned_i24(_x) ( (((guint8*)_x)[2]) | ((((guint8*)_x)[1]) << 8) | ((((gint8*)_x)[0]) << 16) ) -#define write_unaligned_u24(_x,samp) \ -G_STMT_START { \ - *(_x)++ = (samp >> 16) & 0xFF; \ - *(_x)++ = (samp >> 8) & 0xFF; \ - *(_x)++ = samp & 0xFF; \ -} G_STMT_END -#endif - -static void -volume_process_int24 (GstVolume * self, gpointer bytes, guint n_bytes) -{ - gint8 *data = (gint8 *) bytes; /* treat the data as a byte stream */ - guint i, num_samples; - guint32 samp; - gint64 val; - - num_samples = n_bytes / (sizeof (gint8) * 3); - for (i = 0; i < num_samples; i++) { - samp = get_unaligned_i24 (data); - - val = (gint32) samp; - val = - (((gint64) self->current_vol_i24 * - val) >> VOLUME_UNITY_INT24_BIT_SHIFT); - samp = (guint32) val; - - /* write the value back into the stream */ - write_unaligned_u24 (data, samp); - } -} - -static void -volume_process_int24_clamp (GstVolume * self, gpointer bytes, guint n_bytes) -{ - gint8 *data = (gint8 *) bytes; /* treat the data as a byte stream */ - guint i, num_samples; - guint32 samp; - gint64 val; - - num_samples = n_bytes / (sizeof (gint8) * 3); - for (i = 0; i < num_samples; i++) { - samp = get_unaligned_i24 (data); - - val = (gint32) samp; - val = - (((gint64) self->current_vol_i24 * - val) >> VOLUME_UNITY_INT24_BIT_SHIFT); - samp = (guint32) CLAMP (val, VOLUME_MIN_INT24, VOLUME_MAX_INT24); - - /* write the value back into the stream */ - write_unaligned_u24 (data, samp); - } -} - -static void -volume_process_int16 (GstVolume * self, gpointer bytes, guint n_bytes) -{ - gint16 *data = (gint16 *) bytes; - guint num_samples = n_bytes / sizeof (gint16); - -#if 1 - guint i; - gint val; - - for (i = 0; i < num_samples; i++) { - /* we use bitshifting instead of dividing by UNITY_INT for speed */ - val = (gint) * data; - *data++ = - (gint16) ((self->current_vol_i16 * - val) >> VOLUME_UNITY_INT16_BIT_SHIFT); - } -#else - /* FIXME: need oil_scalarmultiply_s16_ns ? - * https://bugs.freedesktop.org/show_bug.cgi?id=7060 - * code below - * - crashes :/ - * - real_vol_i is scaled by VOLUME_UNITY_INT16 and needs the bitshift - * time gst-launch 2>/dev/null audiotestsrc wave=7 num-buffers=100 ! volume volume=1.5 ! fakesink - */ - oil_scalarmult_s16 (data, 0, data, 0, - ((gint16 *) (void *) (&self->current_vol_i)), num_samples); -#endif -} - -static void -volume_process_int16_clamp (GstVolume * self, gpointer bytes, guint n_bytes) -{ - gint16 *data = (gint16 *) bytes; - guint i, num_samples; - gint val; - - num_samples = n_bytes / sizeof (gint16); - - /* FIXME: oil_scalarmultiply_s16_ns ? - * https://bugs.freedesktop.org/show_bug.cgi?id=7060 - */ - for (i = 0; i < num_samples; i++) { - /* we use bitshifting instead of dividing by UNITY_INT for speed */ - val = (gint) * data; - *data++ = - (gint16) CLAMP ((self->current_vol_i16 * - val) >> VOLUME_UNITY_INT16_BIT_SHIFT, VOLUME_MIN_INT16, - VOLUME_MAX_INT16); - } -} - -static void -volume_process_int8 (GstVolume * self, gpointer bytes, guint n_bytes) -{ - gint8 *data = (gint8 *) bytes; - guint num_samples = n_bytes / sizeof (gint8); - guint i; - gint val; - - for (i = 0; i < num_samples; i++) { - /* we use bitshifting instead of dividing by UNITY_INT for speed */ - val = (gint) * data; - *data++ = - (gint8) ((self->current_vol_i8 * val) >> VOLUME_UNITY_INT8_BIT_SHIFT); - } -} - -static void -volume_process_int8_clamp (GstVolume * self, gpointer bytes, guint n_bytes) -{ - gint8 *data = (gint8 *) bytes; - guint i, num_samples; - gint val; - - num_samples = n_bytes / sizeof (gint8); - - for (i = 0; i < num_samples; i++) { - /* we use bitshifting instead of dividing by UNITY_INT for speed */ - val = (gint) * data; - *data++ = - (gint8) CLAMP ((self->current_vol_i8 * - val) >> VOLUME_UNITY_INT8_BIT_SHIFT, VOLUME_MIN_INT8, - VOLUME_MAX_INT8); - } -} - -/* GstBaseTransform vmethod implementations */ - -/* get notified of caps and plug in the correct process function */ -static gboolean -volume_setup (GstAudioFilter * filter, GstRingBufferSpec * format) -{ - gboolean res; - GstVolume *self = GST_VOLUME (filter); - gfloat volume; - gboolean mute; - - GST_OBJECT_LOCK (self); - volume = self->volume; - mute = self->mute; - GST_OBJECT_UNLOCK (self); - - res = volume_update_volume (self, volume, mute); - if (!res) { - GST_ELEMENT_ERROR (self, CORE, NEGOTIATION, - ("Invalid incoming format"), (NULL)); - } - self->negotiated = res; - - return res; -} - -static void -volume_before_transform (GstBaseTransform * base, GstBuffer * buffer) -{ - GstClockTime timestamp; - GstVolume *self = GST_VOLUME (base); - gfloat volume; - gboolean mute; - - /* FIXME: if controllers are bound, subdivide GST_BUFFER_SIZE into small - * chunks for smooth fades, what is small? 1/10th sec. - */ - timestamp = GST_BUFFER_TIMESTAMP (buffer); - timestamp = - gst_segment_to_stream_time (&base->segment, GST_FORMAT_TIME, timestamp); - - GST_DEBUG_OBJECT (base, "sync to %" GST_TIME_FORMAT, - GST_TIME_ARGS (timestamp)); - - if (GST_CLOCK_TIME_IS_VALID (timestamp)) - gst_object_sync_values (G_OBJECT (self), timestamp); - - /* get latest values */ - GST_OBJECT_LOCK (self); - volume = self->volume; - mute = self->mute; - GST_OBJECT_UNLOCK (self); - - if ((volume != self->current_volume) || (mute != self->current_mute)) { - /* the volume or mute was updated, update our internal state before - * we continue processing. */ - volume_update_volume (self, volume, mute); - } -} - -/* call the plugged-in process function for this instance - * needs to be done with this indirection since volume_transform is - * a class-global method - */ -static GstFlowReturn -volume_transform_ip (GstBaseTransform * base, GstBuffer * outbuf) -{ - GstVolume *self = GST_VOLUME (base); - guint8 *data; - guint size; - - if (G_UNLIKELY (!self->negotiated)) - goto not_negotiated; - - /* don't process data in passthrough-mode */ - if (gst_base_transform_is_passthrough (base) || - GST_BUFFER_FLAG_IS_SET (outbuf, GST_BUFFER_FLAG_GAP)) - return GST_FLOW_OK; - - data = GST_BUFFER_DATA (outbuf); - size = GST_BUFFER_SIZE (outbuf); - - if (self->current_volume == 0.0) { - memset (data, 0, size); - GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_GAP); - } else if (self->current_volume != 1.0) { - self->process (self, data, size); - } - - return GST_FLOW_OK; - - /* ERRORS */ -not_negotiated: - { - GST_ELEMENT_ERROR (self, CORE, NEGOTIATION, - ("No format was negotiated"), (NULL)); - return GST_FLOW_NOT_NEGOTIATED; - } -} - -static void -volume_set_property (GObject * object, guint prop_id, const GValue * value, - GParamSpec * pspec) -{ - GstVolume *self = GST_VOLUME (object); - - switch (prop_id) { - case PROP_MUTE: - GST_OBJECT_LOCK (self); - self->mute = g_value_get_boolean (value); - GST_OBJECT_UNLOCK (self); - break; - case PROP_VOLUME: - GST_OBJECT_LOCK (self); - self->volume = g_value_get_double (value); - GST_OBJECT_UNLOCK (self); - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); - break; - } -} - -static void -volume_get_property (GObject * object, guint prop_id, GValue * value, - GParamSpec * pspec) -{ - GstVolume *self = GST_VOLUME (object); - - switch (prop_id) { - case PROP_MUTE: - GST_OBJECT_LOCK (self); - g_value_set_boolean (value, self->mute); - GST_OBJECT_UNLOCK (self); - break; - case PROP_VOLUME: - GST_OBJECT_LOCK (self); - g_value_set_double (value, self->volume); - GST_OBJECT_UNLOCK (self); - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); - break; - } -} - -static gboolean -plugin_init (GstPlugin * plugin) -{ - oil_init (); - - /* initialize gst controller library */ - gst_controller_init (NULL, NULL); - - GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "volume", 0, "Volume gain"); - - /* ref class from a thread-safe context to work around missing bit of - * thread-safety in GObject */ - g_type_class_ref (GST_TYPE_MIXER_TRACK); - - return gst_element_register (plugin, "volume", GST_RANK_NONE, - GST_TYPE_VOLUME); -} - -GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, - GST_VERSION_MINOR, - "volume", - "plugin for controlling audio volume", - plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN); |