整理代码

2026-09-28 21:33:04 +08:00 · 2026-09-28 21:33:04 +08:00 · c7b4e178ec
commit c7b4e178ec
364 changed files with 59691 additions and 0 deletions
--- a/video/alsa/SoundCard.cpp
+++ b/video/alsa/SoundCard.cpp
@ -0,0 +1,124 @@
+/*
+ *******************************************************************************
+ *                                   INCLUDE
+ *******************************************************************************
+ */
+#include "SoundCard.h"
+#include <Poco/Format.h>
+
+namespace Video
+{
+namespace ALSA
+{
+/*
+ *******************************************************************************
+ *                                CLASS DEFINE
+ *******************************************************************************
+ */
+SoundCard::SoundCard(int index): _index(index)
+{
+    initialize();
+}
+
+SoundCard::~SoundCard()
+{
+}
+
+void SoundCard::initialize()
+{
+    _info.device = Poco::format("hw:%d", _index);
+    int        rc;
+    snd_ctl_t* handle;
+    if ((rc = snd_ctl_open(&handle, _info.device.c_str(), 0)) < 0)
+        throw Poco::InvalidAccessException("SoundCard: Cannot open device");
+
+    snd_ctl_card_info_t* info;
+    snd_ctl_card_info_alloca(&info);
+    if ((rc = snd_ctl_card_info(handle, info)) < 0)
+        throw Poco::InvalidAccessException("SoundCard: Cannot get card info");
+
+    _info.id         = snd_ctl_card_info_get_id(info);
+    _info.name       = snd_ctl_card_info_get_name(info);
+    _info.longname   = snd_ctl_card_info_get_longname(info);
+    _info.driver     = snd_ctl_card_info_get_driver(info);
+    _info.components = snd_ctl_card_info_get_components(info);
+    _info.mixername  = snd_ctl_card_info_get_mixername(info);
+
+    snd_ctl_close(handle);
+
+    auto enumerateCapabilities = [](snd_pcm_t* pcm, Info& info)
+    {
+        snd_pcm_hw_params_t* params;
+        snd_pcm_hw_params_alloca(&params);
+        snd_pcm_hw_params_any(pcm, params);
+
+        for (int access = 0; access <= SND_PCM_ACCESS_LAST; access++)
+            info.access[access] = (snd_pcm_hw_params_test_access(pcm, params, (snd_pcm_access_t)access) == 0);
+
+        for (int format = 0; format <= SND_PCM_FORMAT_LAST; format++)
+        {
+            if (snd_pcm_hw_params_test_format(pcm, params, (snd_pcm_format_t)format) == 0)
+                info.formats.push_back((snd_pcm_format_t)format);
+        }
+
+        for (unsigned int rate = 1000; rate <= 384000; rate += 1000)
+        {
+            if (snd_pcm_hw_params_test_rate(pcm, params, rate, 0) == 0)
+                info.sampleRates.push_back(rate);
+        }
+
+        for (int channels = 1; channels <= 16; channels++)
+        {
+            if (snd_pcm_hw_params_test_channels(pcm, params, channels) == 0)
+            {
+                info.channels = channels;
+                break;
+            }
+        }
+
+        for (snd_pcm_uframes_t val = 16; val <= 1048576; val *= 2)
+        {
+            if (snd_pcm_hw_params_test_buffer_size(pcm, params, val) == 0)
+                info.bufferSizes.push_back(val);
+        }
+    };
+
+    snd_pcm_t* pcm;
+    int        err = snd_pcm_open(&pcm, _info.device.c_str(), SND_PCM_STREAM_CAPTURE, 0);
+    if (err < 0)
+        _info.supportCapture = false;
+    else
+    {
+        _info.supportCapture = true;
+        enumerateCapabilities(pcm, _info);
+        snd_pcm_close(pcm);
+    }
+
+    err = snd_pcm_open(&pcm, _info.device.c_str(), SND_PCM_STREAM_PLAYBACK, 0);
+    if (err < 0)
+        _info.supportPlayback = false;
+    else
+    {
+        _info.supportPlayback = true;
+        if (!_info.supportCapture)
+            enumerateCapabilities(pcm, _info);
+        snd_pcm_close(pcm);
+    }
+}
+
+SoundCard::Info& SoundCard::info()
+{
+    return _info;
+}
+
+SoundCard::SoundCards SoundCard::getSoundCards()
+{
+    SoundCards cards;
+    int        id = -1;
+    while (snd_card_next(&id), id >= 0)
+        cards.push_back(new SoundCard(id));
+
+    return cards;
+}
+}
+}