| /* -*- 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> |
| * Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk> |
| * |
| * 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-volume |
| * @title: volume |
| * |
| * The volume element changes the volume of the audio data. |
| * |
| * ## Example launch line |
| * |[ |
| * gst-launch-1.0 -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. |
| * |
| */ |
| |
| #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/audio/gstaudiofilter.h> |
| |
| #ifdef HAVE_ORC |
| #include <orc/orcfunctions.h> |
| #else |
| #define orc_memset memset |
| #endif |
| |
| #include "gstvolumeorc.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 8 /* internal int for unity 2^(8-5) */ |
| #define VOLUME_UNITY_INT8_BIT_SHIFT 3 /* number of bits to shift for unity */ |
| #define VOLUME_UNITY_INT16 2048 /* internal int for unity 2^(16-5) */ |
| #define VOLUME_UNITY_INT16_BIT_SHIFT 11 /* number of bits to shift for unity */ |
| #define VOLUME_UNITY_INT24 524288 /* internal int for unity 2^(24-5) */ |
| #define VOLUME_UNITY_INT24_BIT_SHIFT 19 /* 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 |
| |
| #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 |
| }; |
| |
| #if G_BYTE_ORDER == G_LITTLE_ENDIAN |
| #define ALLOWED_CAPS \ |
| GST_AUDIO_CAPS_MAKE ("{ F32LE, F64LE, S8, S16LE, S24LE, S32LE }") \ |
| ", layout = (string) interleaved" |
| #else |
| #define ALLOWED_CAPS \ |
| GST_AUDIO_CAPS_MAKE ("{ F32BE, F64BE, S8, S16BE, S24BE, S32BE }") \ |
| ", layout = (string) { interleaved, non-interleaved }" |
| #endif |
| |
| #define gst_volume_parent_class parent_class |
| G_DEFINE_TYPE_WITH_CODE (GstVolume, gst_volume, |
| GST_TYPE_AUDIO_FILTER, |
| G_IMPLEMENT_INTERFACE (GST_TYPE_STREAM_VOLUME, NULL)); |
| |
| 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_stop (GstBaseTransform * base); |
| static gboolean volume_setup (GstAudioFilter * filter, |
| const GstAudioInfo * info); |
| |
| static void volume_process_double (GstVolume * self, gpointer bytes, |
| guint n_bytes); |
| static void volume_process_controlled_double (GstVolume * self, gpointer bytes, |
| gdouble * volume, guint channels, guint n_bytes); |
| static void volume_process_float (GstVolume * self, gpointer bytes, |
| guint n_bytes); |
| static void volume_process_controlled_float (GstVolume * self, gpointer bytes, |
| gdouble * volume, guint channels, 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_controlled_int32_clamp (GstVolume * self, |
| gpointer bytes, gdouble * volume, guint channels, 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_controlled_int24_clamp (GstVolume * self, |
| gpointer bytes, gdouble * volume, guint channels, 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_controlled_int16_clamp (GstVolume * self, |
| gpointer bytes, gdouble * volume, guint channels, 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); |
| static void volume_process_controlled_int8_clamp (GstVolume * self, |
| gpointer bytes, gdouble * volume, guint channels, guint n_bytes); |
| |
| |
| /* helper functions */ |
| |
| static gboolean |
| volume_choose_func (GstVolume * self, const GstAudioInfo * info) |
| { |
| GstAudioFormat format; |
| |
| self->process = NULL; |
| self->process_controlled = NULL; |
| |
| format = GST_AUDIO_INFO_FORMAT (info); |
| |
| if (format == GST_AUDIO_FORMAT_UNKNOWN) |
| return FALSE; |
| |
| switch (format) { |
| case GST_AUDIO_FORMAT_S32: |
| /* only clamp if the gain is greater than 1.0 */ |
| if (self->current_vol_i32 > VOLUME_UNITY_INT32) { |
| self->process = volume_process_int32_clamp; |
| } else { |
| self->process = volume_process_int32; |
| } |
| self->process_controlled = volume_process_controlled_int32_clamp; |
| break; |
| case GST_AUDIO_FORMAT_S24: |
| /* only clamp if the gain is greater than 1.0 */ |
| if (self->current_vol_i24 > VOLUME_UNITY_INT24) { |
| self->process = volume_process_int24_clamp; |
| } else { |
| self->process = volume_process_int24; |
| } |
| self->process_controlled = volume_process_controlled_int24_clamp; |
| break; |
| case GST_AUDIO_FORMAT_S16: |
| /* only clamp if the gain is greater than 1.0 */ |
| if (self->current_vol_i16 > VOLUME_UNITY_INT16) { |
| self->process = volume_process_int16_clamp; |
| } else { |
| self->process = volume_process_int16; |
| } |
| self->process_controlled = volume_process_controlled_int16_clamp; |
| break; |
| case GST_AUDIO_FORMAT_S8: |
| /* only clamp if the gain is greater than 1.0 */ |
| if (self->current_vol_i8 > VOLUME_UNITY_INT8) { |
| self->process = volume_process_int8_clamp; |
| } else { |
| self->process = volume_process_int8; |
| } |
| self->process_controlled = volume_process_controlled_int8_clamp; |
| break; |
| case GST_AUDIO_FORMAT_F32: |
| self->process = volume_process_float; |
| self->process_controlled = volume_process_controlled_float; |
| break; |
| case GST_AUDIO_FORMAT_F64: |
| self->process = volume_process_double; |
| self->process_controlled = volume_process_controlled_double; |
| break; |
| default: |
| break; |
| } |
| |
| return (self->process != NULL); |
| } |
| |
| static gboolean |
| volume_update_volume (GstVolume * self, const GstAudioInfo * info, |
| gdouble 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 = |
| (gint) ((gdouble) volume * (gdouble) VOLUME_UNITY_INT8); |
| self->current_vol_i16 = |
| (gint) ((gdouble) volume * (gdouble) VOLUME_UNITY_INT16); |
| self->current_vol_i24 = |
| (gint) ((gdouble) volume * (gdouble) VOLUME_UNITY_INT24); |
| self->current_vol_i32 = |
| (gint) ((gdouble) volume * (gdouble) VOLUME_UNITY_INT32); |
| |
| passthrough = (self->current_vol_i16 == VOLUME_UNITY_INT16); |
| } |
| |
| /* If a controller is used, never use passthrough mode |
| * because the property can change from 1.0 to something |
| * else in the middle of a buffer. |
| */ |
| passthrough &= !gst_object_has_active_control_bindings (GST_OBJECT (self)); |
| |
| 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, info); |
| |
| return res; |
| } |
| |
| /* 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_class_init (GstVolumeClass * klass) |
| { |
| GObjectClass *gobject_class; |
| GstElementClass *element_class; |
| GstBaseTransformClass *trans_class; |
| GstAudioFilterClass *filter_class; |
| GstCaps *caps; |
| |
| gobject_class = (GObjectClass *) klass; |
| element_class = (GstElementClass *) 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)); |
| |
| gst_element_class_set_static_metadata (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); |
| |
| trans_class->before_transform = GST_DEBUG_FUNCPTR (volume_before_transform); |
| trans_class->transform_ip = GST_DEBUG_FUNCPTR (volume_transform_ip); |
| trans_class->stop = GST_DEBUG_FUNCPTR (volume_stop); |
| trans_class->transform_ip_on_passthrough = FALSE; |
| |
| filter_class->setup = GST_DEBUG_FUNCPTR (volume_setup); |
| } |
| |
| static void |
| gst_volume_init (GstVolume * self) |
| { |
| self->mute = DEFAULT_PROP_MUTE; |
| self->volume = DEFAULT_PROP_VOLUME; |
| |
| self->tracklist = NULL; |
| self->negotiated = FALSE; |
| |
| 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); |
| |
| volume_orc_scalarmultiply_f64_ns (data, self->current_volume, num_samples); |
| } |
| |
| static void |
| volume_process_controlled_double (GstVolume * self, gpointer bytes, |
| gdouble * volume, guint channels, guint n_bytes) |
| { |
| gdouble *data = (gdouble *) bytes; |
| guint num_samples = n_bytes / (sizeof (gdouble) * channels); |
| guint i, j; |
| gdouble vol; |
| |
| if (channels == 1) { |
| volume_orc_process_controlled_f64_1ch (data, volume, num_samples); |
| } else { |
| for (i = 0; i < num_samples; i++) { |
| vol = *volume++; |
| for (j = 0; j < channels; j++) { |
| *data++ *= vol; |
| } |
| } |
| } |
| } |
| |
| static void |
| volume_process_float (GstVolume * self, gpointer bytes, guint n_bytes) |
| { |
| gfloat *data = (gfloat *) bytes; |
| guint num_samples = n_bytes / sizeof (gfloat); |
| |
| volume_orc_scalarmultiply_f32_ns (data, self->current_volume, num_samples); |
| } |
| |
| static void |
| volume_process_controlled_float (GstVolume * self, gpointer bytes, |
| gdouble * volume, guint channels, guint n_bytes) |
| { |
| gfloat *data = (gfloat *) bytes; |
| guint num_samples = n_bytes / (sizeof (gfloat) * channels); |
| guint i, j; |
| gdouble vol; |
| |
| if (channels == 1) { |
| volume_orc_process_controlled_f32_1ch (data, volume, num_samples); |
| } else if (channels == 2) { |
| volume_orc_process_controlled_f32_2ch (data, volume, num_samples); |
| } else { |
| for (i = 0; i < num_samples; i++) { |
| vol = *volume++; |
| for (j = 0; j < channels; j++) { |
| *data++ *= vol; |
| } |
| } |
| } |
| } |
| |
| static void |
| volume_process_int32 (GstVolume * self, gpointer bytes, guint n_bytes) |
| { |
| gint32 *data = (gint32 *) bytes; |
| guint num_samples = n_bytes / sizeof (gint); |
| |
| /* hard coded in volume.orc */ |
| g_assert (VOLUME_UNITY_INT32_BIT_SHIFT == 27); |
| volume_orc_process_int32 (data, self->current_vol_i32, num_samples); |
| } |
| |
| static void |
| volume_process_int32_clamp (GstVolume * self, gpointer bytes, guint n_bytes) |
| { |
| gint32 *data = (gint32 *) bytes; |
| guint num_samples = n_bytes / sizeof (gint); |
| |
| /* hard coded in volume.orc */ |
| g_assert (VOLUME_UNITY_INT32_BIT_SHIFT == 27); |
| |
| volume_orc_process_int32_clamp (data, self->current_vol_i32, num_samples); |
| } |
| |
| static void |
| volume_process_controlled_int32_clamp (GstVolume * self, gpointer bytes, |
| gdouble * volume, guint channels, guint n_bytes) |
| { |
| gint32 *data = (gint32 *) bytes; |
| guint i, j; |
| guint num_samples = n_bytes / (sizeof (gint32) * channels); |
| gdouble vol, val; |
| |
| if (channels == 1) { |
| volume_orc_process_controlled_int32_1ch (data, volume, num_samples); |
| } else { |
| for (i = 0; i < num_samples; i++) { |
| vol = *volume++; |
| for (j = 0; j < channels; j++) { |
| val = *data * vol; |
| *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_controlled_int24_clamp (GstVolume * self, gpointer bytes, |
| gdouble * volume, guint channels, guint n_bytes) |
| { |
| gint8 *data = (gint8 *) bytes; /* treat the data as a byte stream */ |
| guint i, j; |
| guint num_samples = n_bytes / (sizeof (gint8) * 3 * channels); |
| gdouble vol, val; |
| |
| for (i = 0; i < num_samples; i++) { |
| vol = *volume++; |
| for (j = 0; j < channels; j++) { |
| val = get_unaligned_i24 (data) * vol; |
| val = CLAMP (val, VOLUME_MIN_INT24, VOLUME_MAX_INT24); |
| write_unaligned_u24 (data, (gint32) val); |
| } |
| } |
| } |
| |
| static void |
| volume_process_int16 (GstVolume * self, gpointer bytes, guint n_bytes) |
| { |
| gint16 *data = (gint16 *) bytes; |
| guint num_samples = n_bytes / sizeof (gint16); |
| |
| /* hard coded in volume.orc */ |
| g_assert (VOLUME_UNITY_INT16_BIT_SHIFT == 11); |
| |
| volume_orc_process_int16 (data, self->current_vol_i16, num_samples); |
| } |
| |
| static void |
| volume_process_int16_clamp (GstVolume * self, gpointer bytes, guint n_bytes) |
| { |
| gint16 *data = (gint16 *) bytes; |
| guint num_samples = n_bytes / sizeof (gint16); |
| |
| /* hard coded in volume.orc */ |
| g_assert (VOLUME_UNITY_INT16_BIT_SHIFT == 11); |
| |
| volume_orc_process_int16_clamp (data, self->current_vol_i16, num_samples); |
| } |
| |
| static void |
| volume_process_controlled_int16_clamp (GstVolume * self, gpointer bytes, |
| gdouble * volume, guint channels, guint n_bytes) |
| { |
| gint16 *data = (gint16 *) bytes; |
| guint i, j; |
| guint num_samples = n_bytes / (sizeof (gint16) * channels); |
| gdouble vol, val; |
| |
| if (channels == 1) { |
| volume_orc_process_controlled_int16_1ch (data, volume, num_samples); |
| } else if (channels == 2) { |
| volume_orc_process_controlled_int16_2ch (data, volume, num_samples); |
| } else { |
| for (i = 0; i < num_samples; i++) { |
| vol = *volume++; |
| for (j = 0; j < channels; j++) { |
| val = *data * vol; |
| *data++ = (gint16) CLAMP (val, 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); |
| |
| /* hard coded in volume.orc */ |
| g_assert (VOLUME_UNITY_INT8_BIT_SHIFT == 3); |
| |
| volume_orc_process_int8 (data, self->current_vol_i8, num_samples); |
| } |
| |
| static void |
| volume_process_int8_clamp (GstVolume * self, gpointer bytes, guint n_bytes) |
| { |
| gint8 *data = (gint8 *) bytes; |
| guint num_samples = n_bytes / sizeof (gint8); |
| |
| /* hard coded in volume.orc */ |
| g_assert (VOLUME_UNITY_INT8_BIT_SHIFT == 3); |
| |
| volume_orc_process_int8_clamp (data, self->current_vol_i8, num_samples); |
| } |
| |
| static void |
| volume_process_controlled_int8_clamp (GstVolume * self, gpointer bytes, |
| gdouble * volume, guint channels, guint n_bytes) |
| { |
| gint8 *data = (gint8 *) bytes; |
| guint i, j; |
| guint num_samples = n_bytes / (sizeof (gint8) * channels); |
| gdouble val, vol; |
| |
| if (channels == 1) { |
| volume_orc_process_controlled_int8_1ch (data, volume, num_samples); |
| } else if (channels == 2) { |
| volume_orc_process_controlled_int8_2ch (data, volume, num_samples); |
| } else { |
| for (i = 0; i < num_samples; i++) { |
| vol = *volume++; |
| for (j = 0; j < channels; j++) { |
| val = *data * vol; |
| *data++ = (gint8) CLAMP (val, 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, const GstAudioInfo * info) |
| { |
| gboolean res; |
| GstVolume *self = GST_VOLUME (filter); |
| gdouble volume; |
| gboolean mute; |
| |
| GST_OBJECT_LOCK (self); |
| volume = self->volume; |
| mute = self->mute; |
| GST_OBJECT_UNLOCK (self); |
| |
| res = volume_update_volume (self, info, volume, mute); |
| if (!res) { |
| GST_ELEMENT_ERROR (self, CORE, NEGOTIATION, |
| ("Invalid incoming format"), (NULL)); |
| } |
| self->negotiated = res; |
| |
| return res; |
| } |
| |
| static gboolean |
| volume_stop (GstBaseTransform * base) |
| { |
| GstVolume *self = GST_VOLUME (base); |
| |
| g_free (self->volumes); |
| self->volumes = NULL; |
| self->volumes_count = 0; |
| |
| g_free (self->mutes); |
| self->mutes = NULL; |
| self->mutes_count = 0; |
| |
| return GST_CALL_PARENT_WITH_DEFAULT (GST_BASE_TRANSFORM_CLASS, stop, (base), |
| TRUE); |
| } |
| |
| static void |
| volume_before_transform (GstBaseTransform * base, GstBuffer * buffer) |
| { |
| GstClockTime timestamp; |
| GstVolume *self = GST_VOLUME (base); |
| gdouble volume; |
| gboolean mute; |
| |
| 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 (GST_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, GST_AUDIO_FILTER_INFO (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) |
| { |
| GstAudioFilter *filter = GST_AUDIO_FILTER_CAST (base); |
| GstVolume *self = GST_VOLUME (base); |
| GstMapInfo map; |
| GstClockTime ts; |
| |
| if (G_UNLIKELY (!self->negotiated)) |
| goto not_negotiated; |
| |
| /* don't process data with GAP */ |
| if (GST_BUFFER_FLAG_IS_SET (outbuf, GST_BUFFER_FLAG_GAP)) |
| return GST_FLOW_OK; |
| |
| gst_buffer_map (outbuf, &map, GST_MAP_READWRITE); |
| ts = GST_BUFFER_TIMESTAMP (outbuf); |
| ts = gst_segment_to_stream_time (&base->segment, GST_FORMAT_TIME, ts); |
| |
| if (GST_CLOCK_TIME_IS_VALID (ts)) { |
| GstControlBinding *mute_cb, *volume_cb; |
| |
| mute_cb = gst_object_get_control_binding (GST_OBJECT (self), "mute"); |
| volume_cb = gst_object_get_control_binding (GST_OBJECT (self), "volume"); |
| |
| if (mute_cb || (volume_cb && !self->current_mute)) { |
| gint rate = GST_AUDIO_INFO_RATE (&filter->info); |
| gint width = GST_AUDIO_FORMAT_INFO_WIDTH (filter->info.finfo) / 8; |
| gint channels = GST_AUDIO_INFO_CHANNELS (&filter->info); |
| guint nsamples = map.size / (width * channels); |
| GstClockTime interval = gst_util_uint64_scale_int (1, GST_SECOND, rate); |
| gboolean have_mutes = FALSE; |
| gboolean have_volumes = FALSE; |
| |
| if (self->mutes_count < nsamples && mute_cb) { |
| self->mutes = g_realloc (self->mutes, sizeof (gboolean) * nsamples); |
| self->mutes_count = nsamples; |
| } |
| |
| if (self->volumes_count < nsamples) { |
| self->volumes = g_realloc (self->volumes, sizeof (gdouble) * nsamples); |
| self->volumes_count = nsamples; |
| } |
| |
| if (volume_cb && self->volumes) { |
| have_volumes = |
| gst_control_binding_get_value_array (volume_cb, ts, interval, |
| nsamples, (gpointer) self->volumes); |
| gst_object_replace ((GstObject **) & volume_cb, NULL); |
| } |
| if (!have_volumes) { |
| volume_orc_memset_f64 (self->volumes, self->current_volume, nsamples); |
| } |
| |
| if (mute_cb && self->mutes) { |
| have_mutes = gst_control_binding_get_value_array (mute_cb, ts, interval, |
| nsamples, (gpointer) self->mutes); |
| gst_object_replace ((GstObject **) & mute_cb, NULL); |
| } |
| if (have_mutes) { |
| volume_orc_prepare_volumes (self->volumes, self->mutes, nsamples); |
| } else { |
| g_free (self->mutes); |
| self->mutes = NULL; |
| self->mutes_count = 0; |
| } |
| |
| self->process_controlled (self, map.data, self->volumes, channels, |
| map.size); |
| |
| goto done; |
| } else if (volume_cb) { |
| gst_object_unref (volume_cb); |
| } |
| } |
| |
| if (self->current_volume == 0.0 || self->current_mute) { |
| orc_memset (map.data, 0, map.size); |
| GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_GAP); |
| } else if (self->current_volume != 1.0) { |
| self->process (self, map.data, map.size); |
| } |
| |
| done: |
| gst_buffer_unmap (outbuf, &map); |
| |
| 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) |
| { |
| GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "volume", 0, "Volume gain"); |
| |
| 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); |