/* $Id$ */

/***
  This file is part of gst-pulse.

  gst-pulse is free software; you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as
  published by the Free Software Foundation; either version 2.1 of the
  License, or (at your option) any later version.

  gst-pulse 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with gst-pulse; 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 "pulseutil.h"
#include <gst/audio/multichannel.h>

static pa_channel_position_t gst_pos_to_pa[GST_AUDIO_CHANNEL_POSITION_NUM]  = {
    [GST_AUDIO_CHANNEL_POSITION_FRONT_MONO]            = PA_CHANNEL_POSITION_MONO,
    [GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT]            = PA_CHANNEL_POSITION_FRONT_LEFT,
    [GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT]           = PA_CHANNEL_POSITION_FRONT_RIGHT,
    [GST_AUDIO_CHANNEL_POSITION_REAR_CENTER]           = PA_CHANNEL_POSITION_REAR_CENTER,
    [GST_AUDIO_CHANNEL_POSITION_REAR_LEFT]             = PA_CHANNEL_POSITION_REAR_LEFT,
    [GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT]            = PA_CHANNEL_POSITION_REAR_RIGHT,
    [GST_AUDIO_CHANNEL_POSITION_LFE]                   = PA_CHANNEL_POSITION_LFE,
    [GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER]          = PA_CHANNEL_POSITION_FRONT_CENTER,
    [GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER]  = PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER,
    [GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] = PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER,
    [GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT]             = PA_CHANNEL_POSITION_SIDE_LEFT,
    [GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT]            = PA_CHANNEL_POSITION_SIDE_RIGHT,
    [GST_AUDIO_CHANNEL_POSITION_NONE]                  = PA_CHANNEL_POSITION_INVALID
};

gboolean gst_pulse_fill_sample_spec(GstRingBufferSpec *spec, pa_sample_spec *ss) {

    if (spec->format == GST_MU_LAW && spec->width == 8)
        ss->format = PA_SAMPLE_ULAW;
    else if (spec->format == GST_A_LAW && spec->width == 8)
        ss->format = PA_SAMPLE_ALAW;
    else if (spec->format == GST_U8 && spec->width == 8)
        ss->format = PA_SAMPLE_U8;
    else if (spec->format == GST_S16_LE && spec->width == 16)
        ss->format = PA_SAMPLE_S16LE;
    else if (spec->format == GST_S16_BE && spec->width == 16)
        ss->format = PA_SAMPLE_S16BE;
    else if (spec->format == GST_FLOAT32_LE && spec->width == 32)
        ss->format = PA_SAMPLE_FLOAT32LE;
    else if (spec->format == GST_FLOAT32_BE && spec->width == 32)
        ss->format = PA_SAMPLE_FLOAT32BE;
    else if (spec->format == GST_S32_LE && spec->width == 32)
        ss->format = PA_SAMPLE_S32LE;
    else if (spec->format == GST_S32_BE && spec->width == 32)
        ss->format = PA_SAMPLE_S32BE;
    else
        return FALSE;

    ss->channels = spec->channels;
    ss->rate = spec->rate;

    if (!pa_sample_spec_valid(ss))
        return FALSE;

    return TRUE;
}

gchar *gst_pulse_client_name(void) {
    gchar buf[PATH_MAX];
    const char *c;

    if ((c = g_get_application_name()))
        return g_strdup_printf("%s", c);
    else if (pa_get_binary_name(buf, sizeof(buf)))
        return g_strdup_printf("%s", buf);
    else
        return g_strdup("GStreamer");
}

pa_channel_map* gst_pulse_gst_to_channel_map(pa_channel_map* map, GstRingBufferSpec *spec) {
    int i;
    GstAudioChannelPosition* pos;

    pa_channel_map_init(map);

    if (!(pos = gst_audio_get_channel_positions(gst_caps_get_structure(spec->caps, 0)))) {
/*         g_debug("%s: No channel positions!\n", G_STRFUNC); */
        return NULL;
    }

/*     g_debug("%s: Got channel positions:\n", G_STRFUNC); */

    for (i = 0; i < spec->channels; i++) {

        if (pos[i] == GST_AUDIO_CHANNEL_POSITION_NONE) {
            /* no valid mappings for these channels */
            g_free(pos);
            return NULL;
        } else if (pos[i] < GST_AUDIO_CHANNEL_POSITION_NUM)
            map->map[i] = gst_pos_to_pa[pos[i]];
        else
            map->map[i] = PA_CHANNEL_POSITION_INVALID;

        /*g_debug("  channel %d: gst: %d pulse: %d\n", i, pos[i], map->map[i]);*/
    }

    g_free(pos);
    map->channels = spec->channels;

    if (!pa_channel_map_valid(map)) {
/*         g_debug("generated invalid map!\n"); */
        return NULL;
    }

    return map;
}