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https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-02 09:01:46 -05:00
alsa: mixer - add support up 8 mixer channels
We have at least one USB hardware which supports the 8 channels in one mixer element: https://github.com/alsa-project/alsa-ucm-conf/pull/25 POSITION_MASK_CHANNELS define was added for the future extensions. The override_map variable was changed from bool to mask (unsigned int). The channel map override settings is handled for channels up to eight now. Also added missing override-map.3 .. override-map.8 to the configuration parser array. The driver channel position was added to the override mask arguments (syntax is driver:pulseaudio like left:all-left). If ommited, the ALSA's channel positions are guessed by index. Link: https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/292 Signed-off-by: Jaroslav Kysela <perex@perex.cz> Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/389>
This commit is contained in:
Jaroslav Kysela
Arun Raghavan
parent
de9299c7b7
commit
b3e6e2e0df
2 changed files with 103 additions and 21 deletions
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@ -689,6 +689,20 @@ static const snd_mixer_selem_channel_id_t alsa_channel_ids[PA_CHANNEL_POSITION_M
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[PA_CHANNEL_POSITION_TOP_REAR_RIGHT] = SND_MIXER_SCHN_UNKNOWN
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};
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static snd_mixer_selem_channel_id_t alsa_channel_positions[POSITION_MASK_CHANNELS] = {
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SND_MIXER_SCHN_FRONT_LEFT,
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SND_MIXER_SCHN_FRONT_RIGHT,
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SND_MIXER_SCHN_REAR_LEFT,
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SND_MIXER_SCHN_REAR_RIGHT,
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SND_MIXER_SCHN_FRONT_CENTER,
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SND_MIXER_SCHN_WOOFER,
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SND_MIXER_SCHN_SIDE_LEFT,
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SND_MIXER_SCHN_SIDE_RIGHT,
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#if POSITION_MASK_CHANNELS > 8
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#error "Extend alsa_channel_positions[] array (9+)"
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#endif
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};
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static void setting_free(pa_alsa_setting *s) {
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pa_assert(s);
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@ -1767,7 +1781,11 @@ static bool element_probe_volume(pa_alsa_element *e, snd_mixer_elem_t *me) {
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if (is_mono) {
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e->n_channels = 1;
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if (!e->override_map) {
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if ((e->override_map & (1 << (e->n_channels-1))) && e->masks[SND_MIXER_SCHN_MONO][e->n_channels-1] == 0) {
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pa_log_warn("Override map for mono element %s is invalid, ignoring override map", e->path->name);
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e->override_map &= ~(1 << (e->n_channels-1));
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}
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if (!(e->override_map & (1 << (e->n_channels-1)))) {
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for (p = PA_CHANNEL_POSITION_FRONT_LEFT; p < PA_CHANNEL_POSITION_MAX; p++) {
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if (alsa_channel_ids[p] == SND_MIXER_SCHN_UNKNOWN)
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continue;
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@ -1794,24 +1812,25 @@ static bool element_probe_volume(pa_alsa_element *e, snd_mixer_elem_t *me) {
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alsa_id_str(buf, sizeof(buf), &e->alsa_id);
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pa_log_warn("Volume element %s with no channels?", buf);
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return false;
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} else if (e->n_channels > 2) {
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} else if (e->n_channels > POSITION_MASK_CHANNELS) {
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/* FIXME: In some places code like this is used:
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*
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* e->masks[alsa_channel_ids[p]][e->n_channels-1]
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*
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* The definition of e->masks is
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*
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* pa_channel_position_mask_t masks[SND_MIXER_SCHN_LAST + 1][2];
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* pa_channel_position_mask_t masks[SND_MIXER_SCHN_LAST + 1][POSITION_MASK_CHANNELS];
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*
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* Since the array size is fixed at 2, we obviously
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* don't support elements with more than two
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* Since the array size is fixed at POSITION_MASK_CHANNELS, we obviously
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* don't support elements with more than POSITION_MASK_CHANNELS
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* channels... */
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alsa_id_str(buf, sizeof(buf), &e->alsa_id);
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pa_log_warn("Volume element %s has %u channels. That's too much! I can't handle that!", buf, e->n_channels);
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return false;
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}
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if (!e->override_map) {
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retry:
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if (!(e->override_map & (1 << (e->n_channels-1)))) {
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for (p = PA_CHANNEL_POSITION_FRONT_LEFT; p < PA_CHANNEL_POSITION_MAX; p++) {
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bool has_channel;
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@ -1834,6 +1853,17 @@ static bool element_probe_volume(pa_alsa_element *e, snd_mixer_elem_t *me) {
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e->merged_mask |= e->masks[alsa_channel_ids[p]][e->n_channels-1];
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}
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if (e->merged_mask == 0) {
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if (!(e->override_map & (1 << (e->n_channels-1)))) {
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pa_log_warn("Channel map for element %s is invalid", e->path->name);
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return false;
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}
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pa_log_warn("Override map for element %s has empty result, ignoring override map", e->path->name);
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e->override_map &= ~(1 << (e->n_channels-1));
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goto retry;
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}
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return true;
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}
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@ -2427,6 +2457,16 @@ static int element_parse_volume_limit(pa_config_parser_state *state) {
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return 0;
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}
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static unsigned int parse_channel_position(const char *m)
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{
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pa_channel_position_t p;
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if ((p = pa_channel_position_from_string(m)) == PA_CHANNEL_POSITION_INVALID)
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return SND_MIXER_SCHN_UNKNOWN;
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return alsa_channel_ids[p];
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}
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static pa_channel_position_mask_t parse_mask(const char *m) {
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pa_channel_position_mask_t v;
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@ -2464,7 +2504,9 @@ static int element_parse_override_map(pa_config_parser_state *state) {
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pa_alsa_path *p;
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pa_alsa_element *e;
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const char *split_state = NULL;
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char *s;
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unsigned i = 0;
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int channel_count = 0;
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char *n;
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pa_assert(state);
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@ -2476,31 +2518,60 @@ static int element_parse_override_map(pa_config_parser_state *state) {
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return -1;
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}
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s = strstr(state->lvalue, ".");
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if (s) {
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pa_atoi(s + 1, &channel_count);
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if (channel_count < 1 || channel_count > POSITION_MASK_CHANNELS) {
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pa_log("[%s:%u] Override map index '%s' invalid in '%s'", state->filename, state->lineno, state->lvalue, state->section);
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return 0;
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}
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} else {
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pa_log("[%s:%u] Invalid override map syntax '%s' in '%s'", state->filename, state->lineno, state->lvalue, state->section);
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return -1;
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}
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while ((n = pa_split(state->rvalue, ",", &split_state))) {
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pa_channel_position_mask_t m;
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snd_mixer_selem_channel_id_t channel_position;
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if (i >= (unsigned)channel_count) {
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pa_log("[%s:%u] Invalid override map size (>%d) in '%s'", state->filename, state->lineno, channel_count, state->section);
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return -1;
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}
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channel_position = alsa_channel_positions[i];
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if (!*n)
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m = 0;
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else {
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if ((m = parse_mask(n)) == 0) {
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pa_log("[%s:%u] Override map '%s' invalid in '%s'", state->filename, state->lineno, n, state->section);
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s = strstr(n, ":");
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if (s) {
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*s = '\0';
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s++;
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channel_position = parse_channel_position(n);
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if (channel_position == SND_MIXER_SCHN_UNKNOWN) {
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pa_log("[%s:%u] Override map position '%s' invalid in '%s'", state->filename, state->lineno, n, state->section);
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pa_xfree(n);
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return -1;
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}
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}
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if ((m = parse_mask(s ? s : n)) == 0) {
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pa_log("[%s:%u] Override map '%s' invalid in '%s'", state->filename, state->lineno, s ? s : n, state->section);
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pa_xfree(n);
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return -1;
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}
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}
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if (pa_streq(state->lvalue, "override-map.1"))
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e->masks[i++][0] = m;
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else
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e->masks[i++][1] = m;
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/* Later on we might add override-map.3 and so on here ... */
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if (e->masks[channel_position][channel_count-1]) {
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pa_log("[%s:%u] Override map '%s' duplicate position '%s' in '%s'", state->filename, state->lineno, s ? s : n, snd_mixer_selem_channel_name(channel_position), state->section);
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pa_xfree(n);
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return -1;
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}
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e->override_map |= (1 << (channel_count - 1));
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e->masks[channel_position][channel_count-1] = m;
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pa_xfree(n);
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i++;
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}
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e->override_map = true;
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return 0;
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}
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@ -2800,6 +2871,15 @@ pa_alsa_path* pa_alsa_path_new(const char *paths_dir, const char *fname, pa_alsa
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{ "enumeration", element_parse_enumeration, NULL, NULL },
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{ "override-map.1", element_parse_override_map, NULL, NULL },
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{ "override-map.2", element_parse_override_map, NULL, NULL },
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{ "override-map.3", element_parse_override_map, NULL, NULL },
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{ "override-map.4", element_parse_override_map, NULL, NULL },
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{ "override-map.5", element_parse_override_map, NULL, NULL },
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{ "override-map.6", element_parse_override_map, NULL, NULL },
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{ "override-map.7", element_parse_override_map, NULL, NULL },
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{ "override-map.8", element_parse_override_map, NULL, NULL },
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#if POSITION_MASK_CHANNELS > 8
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#error "Add override-map.9+ definitions"
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#endif
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/* ... later on we might add override-map.3 and so on here ... */
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{ "required", element_parse_required, NULL, NULL },
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{ "required-any", element_parse_required, NULL, NULL },
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@ -3172,7 +3252,7 @@ void pa_alsa_element_dump(pa_alsa_element *e) {
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pa_assert(e);
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alsa_id_str(buf, sizeof(buf), &e->alsa_id);
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pa_log_debug("Element %s, direction=%i, switch=%i, volume=%i, volume_limit=%li, enumeration=%i, required=%i, required_any=%i, required_absent=%i, mask=0x%llx, n_channels=%u, override_map=%s",
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pa_log_debug("Element %s, direction=%i, switch=%i, volume=%i, volume_limit=%li, enumeration=%i, required=%i, required_any=%i, required_absent=%i, mask=0x%llx, n_channels=%u, override_map=%02x",
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buf,
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e->direction,
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e->switch_use,
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@ -3184,7 +3264,7 @@ void pa_alsa_element_dump(pa_alsa_element *e) {
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e->required_absent,
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(long long unsigned) e->merged_mask,
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e->n_channels,
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pa_yes_no(e->override_map));
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e->override_map);
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PA_LLIST_FOREACH(o, e->options)
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pa_alsa_option_dump(o);
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@ -50,6 +50,8 @@ typedef struct pa_alsa_port_data pa_alsa_port_data;
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#include "alsa-util.h"
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#include "alsa-ucm.h"
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#define POSITION_MASK_CHANNELS 8
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typedef enum pa_alsa_switch_use {
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PA_ALSA_SWITCH_IGNORE,
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PA_ALSA_SWITCH_MUTE, /* make this switch follow mute status */
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@ -152,7 +154,7 @@ struct pa_alsa_element {
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long constant_volume;
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bool override_map:1;
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unsigned int override_map;
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bool direction_try_other:1;
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bool has_dB:1;
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@ -160,7 +162,7 @@ struct pa_alsa_element {
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long volume_limit; /* -1 for no configured limit */
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double min_dB, max_dB;
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pa_channel_position_mask_t masks[SND_MIXER_SCHN_LAST + 1][2];
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pa_channel_position_mask_t masks[SND_MIXER_SCHN_LAST + 1][POSITION_MASK_CHANNELS];
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unsigned n_channels;
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pa_channel_position_mask_t merged_mask;
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