File: banshee-player-replaygain.c

package info (click to toggle)
banshee 2.6.2-3
  • links: PTS, VCS
  • area: main
  • in suites: jessie, jessie-kfreebsd
  • size: 47,160 kB
  • ctags: 25,019
  • sloc: xml: 163,694; cs: 137,409; sh: 11,650; ansic: 4,790; makefile: 2,928; python: 38
file content (207 lines) | stat: -rw-r--r-- 7,461 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
//
// banshee-player-replaygain.c
//
// Author:
//   Aaron Bockover <abockover@novell.com>
//   Julien Moutte <julien@fluendo.com>
//
// Copyright (C) 2008 Novell, Inc.
// Copyright (C) 2010 Fluendo S.A.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

#include <math.h>
#include "banshee-player-replaygain.h"
#include "banshee-player-pipeline.h"

// ---------------------------------------------------------------------------
// Private Functions
// ---------------------------------------------------------------------------

static gdouble
bp_replaygain_db_to_linear (gdouble value)
{
    return pow (10, value / 20.0);
}

static gdouble bp_rg_calc_history_avg (BansheePlayer *player)
{
    gdouble sum = 0.0;
    int i;
    for (i = 0; i < player->history_size; ++i) {
        sum += player->rg_gain_history[i];
    }
    return sum / player->history_size;
}

static void bp_replaygain_update_history (BansheePlayer *player)
{
    gdouble gain;
    g_return_if_fail (player->history_size <= 10);

    if (player->history_size == 10) {
        memmove (player->rg_gain_history + 1, player->rg_gain_history, sizeof (gdouble) * 9);
    } else {
        memmove (player->rg_gain_history + 1, player->rg_gain_history, sizeof (gdouble) * player->history_size);
        player->history_size++;
    }

    g_object_get (G_OBJECT (player->rgvolume), "target-gain", &gain, NULL);
    player->rg_gain_history[0] = gain;
    bp_debug2 ("[ReplayGain] Added gain: %.2f to history.", gain);

    g_object_set (G_OBJECT (player->rgvolume), "fallback-gain", bp_rg_calc_history_avg (player), NULL);
}

static void on_target_gain_changed (GstElement *rgvolume, GParamSpec *pspec, BansheePlayer *player)
{
    g_return_if_fail (IS_BANSHEE_PLAYER (player));

    bp_replaygain_update_history (player);
    _bp_rgvolume_print_volume (player);
}

static GstPadProbeReturn
pad_block_cb (GstPad *srcPad, GstPadProbeInfo *info, gpointer user_data)
{
    BansheePlayer* player;

    player = (BansheePlayer*) user_data;
    g_return_val_if_fail (IS_BANSHEE_PLAYER (player), GST_PAD_PROBE_OK);

    // The pad_block_cb can get triggered multiple times, on different threads.
    // Lock around the link/unlink code, so we don't end up going through here
    // with inconsistent state.
    g_mutex_lock (player->replaygain_mutex);

    if ((player->replaygain_enabled && player->rgvolume_in_pipeline) ||
        (!player->replaygain_enabled && !player->rgvolume_in_pipeline)) {
        // The pipeline is already in the correct state.  Unblock the pad, and return.
        player->rg_pad_block_id = 0;
        g_mutex_unlock (player->replaygain_mutex);
        return GST_PAD_PROBE_REMOVE;
    }

    if (player->rgvolume_in_pipeline) {
        gst_element_unlink (player->before_rgvolume, player->rgvolume);
        gst_element_unlink (player->rgvolume, player->after_rgvolume);
    } else {
        gst_element_unlink (player->before_rgvolume, player->after_rgvolume);
    }

    if (player->replaygain_enabled) {
        player->rgvolume = _bp_rgvolume_new (player);
        if (!GST_IS_ELEMENT (player->rgvolume)) {
            player->replaygain_enabled = FALSE;
        }
    } else {
        gst_element_set_state (player->rgvolume, GST_STATE_NULL);
        gst_bin_remove (GST_BIN (player->audiobin), player->rgvolume);
    }

    if (player->replaygain_enabled && GST_IS_ELEMENT (player->rgvolume)) {
        g_signal_connect (player->rgvolume, "notify::target-gain", G_CALLBACK (on_target_gain_changed), player);
        gst_bin_add (GST_BIN (player->audiobin), player->rgvolume);
        gst_element_sync_state_with_parent (player->rgvolume);

        // link in rgvolume and connect to the real audio sink
        gst_element_link (player->before_rgvolume, player->rgvolume);
        gst_element_link (player->rgvolume, player->after_rgvolume);
        player->rgvolume_in_pipeline = TRUE;
    } else {
        // link the queue with the real audio sink
        gst_element_link (player->before_rgvolume, player->after_rgvolume);
        player->rgvolume_in_pipeline = FALSE;
    }

    // Our state is now consistent
    player->rg_pad_block_id = 0;
    g_mutex_unlock (player->replaygain_mutex);

    _bp_rgvolume_print_volume (player);

    return GST_PAD_PROBE_REMOVE;
}

// ---------------------------------------------------------------------------
// Internal Functions
// ---------------------------------------------------------------------------


GstElement* _bp_rgvolume_new (BansheePlayer *player)
{
    GstElement *rgvolume = gst_element_factory_make ("rgvolume", NULL);

    if (rgvolume == NULL) {
        bp_debug ("Loading ReplayGain plugin failed.");
    }

    return rgvolume;
}

void _bp_rgvolume_print_volume(BansheePlayer *player)
{
    g_return_if_fail (IS_BANSHEE_PLAYER (player));
    if (player->replaygain_enabled && (player->rgvolume != NULL)) {
        gdouble scale;

        g_object_get (G_OBJECT (player->rgvolume), "result-gain", &scale, NULL);

        bp_debug4 ("scaled volume: %.2f (ReplayGain) * %.2f (User) = %.2f",
                  bp_replaygain_db_to_linear (scale), player->current_volume,
                  bp_replaygain_db_to_linear (scale) * player->current_volume);
    }
}

void _bp_replaygain_pipeline_rebuild (BansheePlayer* player)
{
    GstPad* srcPad;

    g_return_if_fail (IS_BANSHEE_PLAYER (player));
    g_return_if_fail (GST_IS_ELEMENT (player->before_rgvolume));
    srcPad = gst_element_get_static_pad (player->before_rgvolume, "src");

    if (gst_pad_is_active (srcPad) && !gst_pad_is_blocked (srcPad)) {
        player->rg_pad_block_id = gst_pad_add_probe (srcPad, GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM, &pad_block_cb, player, NULL);
    } else if (!player->rg_pad_block_id) {
        pad_block_cb (srcPad, NULL, player);
    }
}

// ---------------------------------------------------------------------------
// Public Functions
// ---------------------------------------------------------------------------

P_INVOKE void
bp_replaygain_set_enabled (BansheePlayer *player, gboolean enabled)
{
    g_return_if_fail (IS_BANSHEE_PLAYER (player));
    player->replaygain_enabled = enabled;
    bp_debug2 ("%s ReplayGain", enabled ? "Enabled" : "Disabled");
    _bp_replaygain_pipeline_rebuild (player);
}

P_INVOKE gboolean
bp_replaygain_get_enabled (BansheePlayer *player)
{
    g_return_val_if_fail (IS_BANSHEE_PLAYER (player), FALSE);
    return player->replaygain_enabled;
}