* call-back invoked to notify about volume changes
*/
static void volcb(void *addr, unsigned newvol)
{
struct priv *p = addr;
p->vol = newvol;
}
static const struct mp_chmap sndio_layouts[MP_NUM_CHANNELS + 1] = {
{0}, // empty
{1, {MP_SPEAKER_ID_FL}}, // mono
MP_CHMAP2(FL, FR), // stereo
{0}, // 2.1
MP_CHMAP4(FL, FR, BL, BR), // 4.0
{0}, // 5.0
MP_CHMAP6(FL, FR, BL, BR, FC, LFE), // 5.1
{0}, // 6.1
MP_CHMAP8(FL, FR, BL, BR, FC, LFE, SL, SR), // 7.1
/* above is the fixed channel assignment for sndio, since we need to fill
all channels and cannot insert silence, not all layouts are supported. */
};
/*
* open device and setup parameters
* return: 0=success -1=fail
*/
static int init(struct ao *ao)
{
struct priv *p = ao->priv;
struct af_to_par {
{"7.1(alsa)", "fl-fr-bl-br-fc-lfe-sl-sr"}, // not in lavc
{"7.1(wide)", "fl-fr-fc-lfe-bl-br-flc-frc"},
{"7.1(wide-side)", "fl-fr-fc-lfe-flc-frc-sl-sr"},
{"octagonal", "fl-fr-fc-bl-br-bc-sl-sr"},
{"downmix", "dl-dr"},
{0}
};
static const struct mp_chmap default_layouts[MP_NUM_CHANNELS + 1] = {
{0}, // empty
MP_CHMAP_INIT_MONO, // mono
MP_CHMAP2(FL, FR), // stereo
MP_CHMAP3(FL, FR, LFE), // 2.1
MP_CHMAP4(FL, FR, FC, BC), // 4.0
MP_CHMAP5(FL, FR, FC, BL, BR), // 5.0
MP_CHMAP6(FL, FR, FC, LFE, BL, BR), // 5.1
MP_CHMAP7(FL, FR, FC, LFE, BC, SL, SR), // 6.1
MP_CHMAP8(FL, FR, FC, LFE, BL, BR, SL, SR), // 7.1
};
// The channel order was lavc/waveex, but differs from lavc for 5, 6 and 8
// channels. 3 and 7 channels were likely undefined (no ALSA support).
// I'm not sure about the 4 channel case: ALSA uses "quad", while the ffmpeg
// default layout is "4.0".
static const char *mplayer_layouts[MP_NUM_CHANNELS + 1] = {
[1] = "mono",
[2] = "stereo",
[4] = "quad",
[5] = "5.0(alsa)",
[6] = "5.1(alsa)",
[8] = "7.1(alsa)",