mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 15:22:09 +00:00
0cc440f291
This is intended for the case when CoreAudio returns only unknown channel layouts, or no channel layout matches the number of channels the CoreAudio device forces. Assume that outputting stereo or mono to the first channels is safe, and that it's better than outputting nothing. It's notable that XBMC/kodi falls back to a static channel layout in this case. For some messed up reason, the layout it uses happens to match with the channel order in ALSA's/mpv's "7.1(alsa)" layout.
303 lines
11 KiB
C
303 lines
11 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "common/common.h"
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#include "ao_coreaudio_utils.h"
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#include "ao_coreaudio_chmap.h"
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static const int speaker_map[][2] = {
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{ kAudioChannelLabel_Left, MP_SPEAKER_ID_FL },
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{ kAudioChannelLabel_Right, MP_SPEAKER_ID_FR },
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{ kAudioChannelLabel_Center, MP_SPEAKER_ID_FC },
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{ kAudioChannelLabel_LFEScreen, MP_SPEAKER_ID_LFE },
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{ kAudioChannelLabel_LeftSurround, MP_SPEAKER_ID_BL },
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{ kAudioChannelLabel_RightSurround, MP_SPEAKER_ID_BR },
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{ kAudioChannelLabel_LeftCenter, MP_SPEAKER_ID_FLC },
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{ kAudioChannelLabel_RightCenter, MP_SPEAKER_ID_FRC },
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{ kAudioChannelLabel_CenterSurround, MP_SPEAKER_ID_BC },
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{ kAudioChannelLabel_LeftSurroundDirect, MP_SPEAKER_ID_SL },
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{ kAudioChannelLabel_RightSurroundDirect, MP_SPEAKER_ID_SR },
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{ kAudioChannelLabel_TopCenterSurround, MP_SPEAKER_ID_TC },
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{ kAudioChannelLabel_VerticalHeightLeft, MP_SPEAKER_ID_TFL },
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{ kAudioChannelLabel_VerticalHeightCenter, MP_SPEAKER_ID_TFC },
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{ kAudioChannelLabel_VerticalHeightRight, MP_SPEAKER_ID_TFR },
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{ kAudioChannelLabel_TopBackLeft, MP_SPEAKER_ID_TBL },
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{ kAudioChannelLabel_TopBackCenter, MP_SPEAKER_ID_TBC },
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{ kAudioChannelLabel_TopBackRight, MP_SPEAKER_ID_TBR },
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// unofficial extensions
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{ kAudioChannelLabel_RearSurroundLeft, MP_SPEAKER_ID_SDL },
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{ kAudioChannelLabel_RearSurroundRight, MP_SPEAKER_ID_SDR },
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{ kAudioChannelLabel_LeftWide, MP_SPEAKER_ID_WL },
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{ kAudioChannelLabel_RightWide, MP_SPEAKER_ID_WR },
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{ kAudioChannelLabel_LFE2, MP_SPEAKER_ID_LFE2 },
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{ kAudioChannelLabel_HeadphonesLeft, MP_SPEAKER_ID_DL },
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{ kAudioChannelLabel_HeadphonesRight, MP_SPEAKER_ID_DR },
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{ kAudioChannelLabel_Unknown, MP_SPEAKER_ID_NA },
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{ 0, -1 },
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};
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static int ca_label_to_mp_speaker_id(AudioChannelLabel label)
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{
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for (int i = 0; speaker_map[i][1] >= 0; i++)
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if (speaker_map[i][0] == label)
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return speaker_map[i][1];
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return -1;
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}
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static void ca_log_layout(struct ao *ao, int l, AudioChannelLayout *layout)
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{
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if (!mp_msg_test(ao->log, l))
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return;
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AudioChannelDescription *descs = layout->mChannelDescriptions;
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mp_msg(ao->log, l, "layout: tag: <%u>, bitmap: <%u>, "
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"descriptions <%u>\n",
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(unsigned) layout->mChannelLayoutTag,
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(unsigned) layout->mChannelBitmap,
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(unsigned) layout->mNumberChannelDescriptions);
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for (int i = 0; i < layout->mNumberChannelDescriptions; i++) {
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AudioChannelDescription d = descs[i];
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mp_msg(ao->log, l, " - description %d: label <%u, %u>, "
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" flags: <%u>, coords: <%f, %f, %f>\n", i,
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(unsigned) d.mChannelLabel,
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(unsigned) ca_label_to_mp_speaker_id(d.mChannelLabel),
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(unsigned) d.mChannelFlags,
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d.mCoordinates[0],
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d.mCoordinates[1],
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d.mCoordinates[2]);
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}
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}
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static AudioChannelLayout *ca_layout_to_custom_layout(struct ao *ao,
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void *talloc_ctx,
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AudioChannelLayout *l)
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{
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AudioChannelLayoutTag tag = l->mChannelLayoutTag;
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AudioChannelLayout *r;
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OSStatus err;
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if (tag == kAudioChannelLayoutTag_UseChannelDescriptions)
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return l;
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if (tag == kAudioChannelLayoutTag_UseChannelBitmap) {
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uint32_t psize;
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err = AudioFormatGetPropertyInfo(
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kAudioFormatProperty_ChannelLayoutForBitmap,
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sizeof(uint32_t), &l->mChannelBitmap, &psize);
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CHECK_CA_ERROR("failed to convert channel bitmap to descriptions (info)");
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r = talloc_size(NULL, psize);
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err = AudioFormatGetProperty(
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kAudioFormatProperty_ChannelLayoutForBitmap,
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sizeof(uint32_t), &l->mChannelBitmap, &psize, r);
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CHECK_CA_ERROR("failed to convert channel bitmap to descriptions (get)");
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} else {
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uint32_t psize;
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err = AudioFormatGetPropertyInfo(
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kAudioFormatProperty_ChannelLayoutForTag,
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sizeof(AudioChannelLayoutTag), &l->mChannelLayoutTag, &psize);
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r = talloc_size(NULL, psize);
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CHECK_CA_ERROR("failed to convert channel tag to descriptions (info)");
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err = AudioFormatGetProperty(
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kAudioFormatProperty_ChannelLayoutForTag,
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sizeof(AudioChannelLayoutTag), &l->mChannelLayoutTag, &psize, r);
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CHECK_CA_ERROR("failed to convert channel tag to descriptions (get)");
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}
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MP_VERBOSE(ao, "converted input channel layout:\n");
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ca_log_layout(ao, MSGL_V, l);
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return r;
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coreaudio_error:
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return NULL;
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}
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static bool ca_layout_to_mp_chmap(struct ao *ao, AudioChannelLayout *layout,
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struct mp_chmap *chmap)
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{
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void *talloc_ctx = talloc_new(NULL);
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MP_VERBOSE(ao, "input channel layout:\n");
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ca_log_layout(ao, MSGL_V, layout);
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AudioChannelLayout *l = ca_layout_to_custom_layout(ao, talloc_ctx, layout);
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if (!l)
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goto coreaudio_error;
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if (l->mNumberChannelDescriptions > MP_NUM_CHANNELS) {
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MP_VERBOSE(ao, "layout has too many descriptions (%u, max: %d)\n",
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(unsigned) l->mNumberChannelDescriptions, MP_NUM_CHANNELS);
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return false;
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}
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chmap->num = l->mNumberChannelDescriptions;
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for (int n = 0; n < l->mNumberChannelDescriptions; n++) {
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AudioChannelLabel label = l->mChannelDescriptions[n].mChannelLabel;
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int speaker = ca_label_to_mp_speaker_id(label);
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if (speaker < 0) {
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MP_VERBOSE(ao, "channel label=%u unusable to build channel "
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"bitmap, skipping layout\n", (unsigned) label);
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goto coreaudio_error;
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}
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chmap->speaker[n] = speaker;
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}
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talloc_free(talloc_ctx);
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MP_VERBOSE(ao, "mp chmap: %s\n", mp_chmap_to_str(chmap));
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return mp_chmap_is_valid(chmap) && !mp_chmap_is_unknown(chmap);
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coreaudio_error:
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MP_VERBOSE(ao, "converted input channel layout (failed):\n");
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ca_log_layout(ao, MSGL_V, layout);
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talloc_free(talloc_ctx);
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return false;
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}
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static AudioChannelLayout* ca_query_layout(struct ao *ao,
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AudioDeviceID device,
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void *talloc_ctx)
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{
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OSStatus err;
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uint32_t psize;
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AudioChannelLayout *r = NULL;
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AudioObjectPropertyAddress p_addr = (AudioObjectPropertyAddress) {
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.mSelector = kAudioDevicePropertyPreferredChannelLayout,
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.mScope = kAudioDevicePropertyScopeOutput,
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.mElement = kAudioObjectPropertyElementWildcard,
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};
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err = AudioObjectGetPropertyDataSize(device, &p_addr, 0, NULL, &psize);
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CHECK_CA_ERROR("could not get device preferred layout (size)");
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r = talloc_size(talloc_ctx, psize);
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err = AudioObjectGetPropertyData(device, &p_addr, 0, NULL, &psize, r);
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CHECK_CA_ERROR("could not get device preferred layout (get)");
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coreaudio_error:
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return r;
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}
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static AudioChannelLayout* ca_query_stereo_layout(struct ao *ao,
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AudioDeviceID device,
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void *talloc_ctx)
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{
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OSStatus err;
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const int nch = 2;
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uint32_t channels[nch];
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AudioChannelLayout *r = NULL;
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AudioObjectPropertyAddress p_addr = (AudioObjectPropertyAddress) {
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.mSelector = kAudioDevicePropertyPreferredChannelsForStereo,
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.mScope = kAudioDevicePropertyScopeOutput,
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.mElement = kAudioObjectPropertyElementWildcard,
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};
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uint32_t psize = sizeof(channels);
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err = AudioObjectGetPropertyData(device, &p_addr, 0, NULL, &psize, channels);
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CHECK_CA_ERROR("could not get device preferred stereo layout");
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psize = sizeof(AudioChannelLayout) + nch * sizeof(AudioChannelDescription);
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r = talloc_zero_size(talloc_ctx, psize);
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r->mChannelLayoutTag = kAudioChannelLayoutTag_UseChannelDescriptions;
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r->mNumberChannelDescriptions = nch;
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AudioChannelDescription desc = {0};
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desc.mChannelFlags = kAudioChannelFlags_AllOff;
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for(int i = 0; i < nch; i++) {
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desc.mChannelLabel = channels[i];
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r->mChannelDescriptions[i] = desc;
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}
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coreaudio_error:
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return r;
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}
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static void ca_retrieve_layouts(struct ao *ao, struct mp_chmap_sel *s,
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AudioDeviceID device)
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{
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void *ta_ctx = talloc_new(NULL);
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struct mp_chmap chmap;
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AudioChannelLayout *ml = ca_query_layout(ao, device, ta_ctx);
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if (ml && ca_layout_to_mp_chmap(ao, ml, &chmap))
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mp_chmap_sel_add_map(s, &chmap);
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AudioChannelLayout *sl = ca_query_stereo_layout(ao, device, ta_ctx);
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if (sl && ca_layout_to_mp_chmap(ao, sl, &chmap))
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mp_chmap_sel_add_map(s, &chmap);
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talloc_free(ta_ctx);
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}
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bool ca_init_chmap(struct ao *ao, AudioDeviceID device)
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{
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struct mp_chmap_sel chmap_sel = {0};
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ca_retrieve_layouts(ao, &chmap_sel, device);
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if (!chmap_sel.num_chmaps)
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mp_chmap_sel_add_map(&chmap_sel, &(struct mp_chmap)MP_CHMAP_INIT_STEREO);
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mp_chmap_sel_add_map(&chmap_sel, &(struct mp_chmap)MP_CHMAP_INIT_MONO);
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if (!ao_chmap_sel_adjust(ao, &chmap_sel, &ao->channels)) {
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MP_ERR(ao, "could not select a suitable channel map among the "
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"hardware supported ones. Make sure to configure your "
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"output device correctly in 'Audio MIDI Setup.app'\n");
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return false;
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}
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return true;
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}
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void ca_get_active_chmap(struct ao *ao, AudioDeviceID device, int channel_count,
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struct mp_chmap *out_map)
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{
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// Apparently, we have to guess by looking back at the supported layouts,
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// and I haven't found a property that retrieves the actual currently
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// active channel layout.
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struct mp_chmap_sel chmap_sel = {0};
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ca_retrieve_layouts(ao, &chmap_sel, device);
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// Use any exact match.
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for (int n = 0; n < chmap_sel.num_chmaps; n++) {
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if (chmap_sel.chmaps[n].num == channel_count) {
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MP_VERBOSE(ao, "mismatching channels - fallback #%d\n", n);
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*out_map = chmap_sel.chmaps[n];
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return;
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}
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}
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// Fall back to stereo or mono, and fill the rest with silence. (We don't
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// know what the device expects. We could use a larger default layout here,
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// but let's not.)
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mp_chmap_from_channels(out_map, MPMIN(2, channel_count));
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out_map->num = channel_count;
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for (int n = 2; n < out_map->num; n++)
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out_map->speaker[n] = MP_SPEAKER_ID_NA;
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MP_WARN(ao, "mismatching channels - falling back to %s\n",
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mp_chmap_to_str(out_map));
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}
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