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David Reid
2025-02-21 10:49:14 +10:00
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@@ -248,7 +248,7 @@ a.doc-navigation-l4 {
<div style="background-color:#fff; padding-bottom:0em; border-top:solid 1px #003800; background-color:#eee;">
<table border="0" style="margin:0 auto; width:100%; border-collapse:collapse; border:solid 0px #000; table-layout:fixed;"><tr>
<td valign="top" style="width:20em; padding:0; margin:0; border-right:solid 0px #000;"><div style="position:relative; height:100%; width:100%; border:solid 0px #000; padding:0; margin:0;">
<a href="../index.html" class="doc-navigation">Documentation Home</a><a href="../manual/index.html" class="doc-navigation">Programming Manual</a><a href="index.html" class="doc-navigation ">Examples</a><a href="custom_backend.html" class="doc-navigation doc-navigation-l1 ">Custom Backend</a><a href="custom_decoder.html" class="doc-navigation doc-navigation-l1 ">Custom Decoder</a><a href="custom_decoder_engine.html" class="doc-navigation doc-navigation-l1 doc-navigation-active">Custom Decoder Engine</a><a href="data_source_chaining.html" class="doc-navigation doc-navigation-l1 ">Data Source Chaining</a><a href="duplex_effect.html" class="doc-navigation doc-navigation-l1 ">Duplex Effect</a><a href="engine_advanced.html" class="doc-navigation doc-navigation-l1 ">Engine Advanced</a><a href="engine_effects.html" class="doc-navigation doc-navigation-l1 ">Engine Effects</a><a href="engine_hello_world.html" class="doc-navigation doc-navigation-l1 ">Engine Hello World</a><a href="engine_sdl.html" class="doc-navigation doc-navigation-l1 ">Engine Sdl</a><a href="engine_steamaudio.html" class="doc-navigation doc-navigation-l1 ">Engine Steamaudio</a><a href="hilo_interop.html" class="doc-navigation doc-navigation-l1 ">Hilo Interop</a><a href="node_graph.html" class="doc-navigation doc-navigation-l1 ">Node Graph</a><a href="resource_manager.html" class="doc-navigation doc-navigation-l1 ">Resource Manager</a><a href="resource_manager_advanced.html" class="doc-navigation doc-navigation-l1 ">Resource Manager Advanced</a><a href="simple_capture.html" class="doc-navigation doc-navigation-l1 ">Simple Capture</a><a href="simple_duplex.html" class="doc-navigation doc-navigation-l1 ">Simple Duplex</a><a href="simple_enumeration.html" class="doc-navigation doc-navigation-l1 ">Simple Enumeration</a><a href="simple_loopback.html" class="doc-navigation doc-navigation-l1 ">Simple Loopback</a><a href="simple_looping.html" class="doc-navigation doc-navigation-l1 ">Simple Looping</a><a href="simple_mixing.html" class="doc-navigation doc-navigation-l1 ">Simple Mixing</a><a href="simple_playback.html" class="doc-navigation doc-navigation-l1 ">Simple Playback</a><a href="simple_playback_sine.html" class="doc-navigation doc-navigation-l1 ">Simple Playback Sine</a><a href="simple_playback_sine.html" class="doc-navigation doc-navigation-l1 ">Simple Playback Sine</a><a href="../api/index.html" class="doc-navigation" style="border-bottom:none;">API Reference</a></div></td><td valign="top" style="padding:1em; border-left:solid 1px #bbb;">
<a href="../index.html" class="doc-navigation">Documentation Home</a><a href="../manual/index.html" class="doc-navigation">Programming Manual</a><a href="index.html" class="doc-navigation ">Examples</a><a href="custom_backend.html" class="doc-navigation doc-navigation-l1 ">Custom Backend</a><a href="custom_decoder.html" class="doc-navigation doc-navigation-l1 ">Custom Decoder</a><a href="custom_decoder_engine.html" class="doc-navigation doc-navigation-l1 doc-navigation-active">Custom Decoder Engine</a><a href="data_source_chaining.html" class="doc-navigation doc-navigation-l1 ">Data Source Chaining</a><a href="duplex_effect.html" class="doc-navigation doc-navigation-l1 ">Duplex Effect</a><a href="engine_advanced.html" class="doc-navigation doc-navigation-l1 ">Engine Advanced</a><a href="engine_effects.html" class="doc-navigation doc-navigation-l1 ">Engine Effects</a><a href="engine_hello_world.html" class="doc-navigation doc-navigation-l1 ">Engine Hello World</a><a href="engine_sdl.html" class="doc-navigation doc-navigation-l1 ">Engine Sdl</a><a href="engine_steamaudio.html" class="doc-navigation doc-navigation-l1 ">Engine Steamaudio</a><a href="hilo_interop.html" class="doc-navigation doc-navigation-l1 ">Hilo Interop</a><a href="node_graph.html" class="doc-navigation doc-navigation-l1 ">Node Graph</a><a href="resource_manager.html" class="doc-navigation doc-navigation-l1 ">Resource Manager</a><a href="resource_manager_advanced.html" class="doc-navigation doc-navigation-l1 ">Resource Manager Advanced</a><a href="simple_capture.html" class="doc-navigation doc-navigation-l1 ">Simple Capture</a><a href="simple_duplex.html" class="doc-navigation doc-navigation-l1 ">Simple Duplex</a><a href="simple_enumeration.html" class="doc-navigation doc-navigation-l1 ">Simple Enumeration</a><a href="simple_loopback.html" class="doc-navigation doc-navigation-l1 ">Simple Loopback</a><a href="simple_looping.html" class="doc-navigation doc-navigation-l1 ">Simple Looping</a><a href="simple_mixing.html" class="doc-navigation doc-navigation-l1 ">Simple Mixing</a><a href="simple_playback.html" class="doc-navigation doc-navigation-l1 ">Simple Playback</a><a href="simple_playback_sine.html" class="doc-navigation doc-navigation-l1 ">Simple Playback Sine</a><a href="simple_playback_sine.html" class="doc-navigation doc-navigation-l1 ">Simple Playback Sine</a><a href="simple_spatialization.html" class="doc-navigation doc-navigation-l1 ">Simple Spatialization</a><a href="../api/index.html" class="doc-navigation" style="border-bottom:none;">API Reference</a></div></td><td valign="top" style="padding:1em; border-left:solid 1px #bbb;">
<h1>Custom Decoder Engine</h1><p>
Demonstrates how to implement a custom decoder and use it with the high level API.
</p>
@@ -258,166 +258,16 @@ This is the same as the custom_decoder example, only it&#39;s used with the high
rather than the low level decoding API. You can use this to add support for Opus to your games, for
example (via libopus).</p>
<div style="font-family:monospace; border:solid 1px #003800; border-left:solid 0.5em #003800; margin:1em 0em; width:100%;"><pre style="margin:0.5em 1em; padding:0; line-height:125%; overflow-x:auto;">
<span style="color:#666666">#define</span> MA_NO_VORBIS <span style="color:#009900">/* Disable the built-in Vorbis decoder to ensure the libvorbis decoder is picked. */</span>
<span style="color:#666666">#define</span> MA_NO_OPUS <span style="color:#009900">/* Disable the (not yet implemented) built-in Opus decoder to ensure the libopus decoder is picked. */</span>
<span style="color:#666666">#define</span> MINIAUDIO_IMPLEMENTATION
<span style="color:#666666">#include</span> <span style="color:#cc3300">&quot;../miniaudio.h&quot;</span>
<span style="color:#666666">#include</span> <span style="color:#cc3300">&quot;../extras/miniaudio_libvorbis.h&quot;</span>
<span style="color:#666666">#include</span> <span style="color:#cc3300">&quot;../extras/miniaudio_libopus.h&quot;</span>
<span style="color:#009900">/*
For now these need to be declared before miniaudio.c due to some compatibility issues with the old
MINIAUDIO_IMPLEMENTATION system. This will change from version 0.12.
*/</span>
<span style="color:#666666">#include</span> <span style="color:#cc3300">&quot;../extras/decoders/libvorbis/miniaudio_libvorbis.c&quot;</span>
<span style="color:#666666">#include</span> <span style="color:#cc3300">&quot;../extras/decoders/libopus/miniaudio_libopus.c&quot;</span>
<span style="color:#666666">#include</span> <span style="color:#cc3300">&quot;../miniaudio.c&quot;</span>
<span style="color:#666666">#include</span> <span style="color:#cc3300">&lt;stdio.h&gt;</span>
<span style="color:#0033ff">static</span> <span style="color:#0099cc">ma_result</span> ma_decoding_backend_init__libvorbis(<span style="color:#0033ff">void</span>* pUserData, ma_read_proc onRead, ma_seek_proc onSeek, ma_tell_proc onTell, <span style="color:#0033ff">void</span>* pReadSeekTellUserData, <span style="color:#0033ff">const</span> ma_decoding_backend_config* pConfig, <span style="color:#0033ff">const</span> ma_allocation_callbacks* pAllocationCallbacks, <span style="color:#0099cc">ma_data_source</span>** ppBackend)
{
<span style="color:#0099cc">ma_result</span> result;
ma_libvorbis* pVorbis;
(<span style="color:#0033ff">void</span>)pUserData;
pVorbis = (ma_libvorbis*)ma_malloc(<span style="color:#0033ff">sizeof</span>(*pVorbis), pAllocationCallbacks);
<span style="color:#0033ff">if</span> (pVorbis == NULL) {
<span style="color:#0033ff">return</span> MA_OUT_OF_MEMORY;
}
result = ma_libvorbis_init(onRead, onSeek, onTell, pReadSeekTellUserData, pConfig, pAllocationCallbacks, pVorbis);
<span style="color:#0033ff">if</span> (result != MA_SUCCESS) {
ma_free(pVorbis, pAllocationCallbacks);
<span style="color:#0033ff">return</span> result;
}
*ppBackend = pVorbis;
<span style="color:#0033ff">return</span> MA_SUCCESS;
}
<span style="color:#0033ff">static</span> <span style="color:#0099cc">ma_result</span> ma_decoding_backend_init_file__libvorbis(<span style="color:#0033ff">void</span>* pUserData, <span style="color:#0033ff">const</span> <span style="color:#0033ff">char</span>* pFilePath, <span style="color:#0033ff">const</span> ma_decoding_backend_config* pConfig, <span style="color:#0033ff">const</span> ma_allocation_callbacks* pAllocationCallbacks, <span style="color:#0099cc">ma_data_source</span>** ppBackend)
{
<span style="color:#0099cc">ma_result</span> result;
ma_libvorbis* pVorbis;
(<span style="color:#0033ff">void</span>)pUserData;
pVorbis = (ma_libvorbis*)ma_malloc(<span style="color:#0033ff">sizeof</span>(*pVorbis), pAllocationCallbacks);
<span style="color:#0033ff">if</span> (pVorbis == NULL) {
<span style="color:#0033ff">return</span> MA_OUT_OF_MEMORY;
}
result = ma_libvorbis_init_file(pFilePath, pConfig, pAllocationCallbacks, pVorbis);
<span style="color:#0033ff">if</span> (result != MA_SUCCESS) {
ma_free(pVorbis, pAllocationCallbacks);
<span style="color:#0033ff">return</span> result;
}
*ppBackend = pVorbis;
<span style="color:#0033ff">return</span> MA_SUCCESS;
}
<span style="color:#0033ff">static</span> <span style="color:#0033ff">void</span> ma_decoding_backend_uninit__libvorbis(<span style="color:#0033ff">void</span>* pUserData, <span style="color:#0099cc">ma_data_source</span>* pBackend, <span style="color:#0033ff">const</span> ma_allocation_callbacks* pAllocationCallbacks)
{
ma_libvorbis* pVorbis = (ma_libvorbis*)pBackend;
(<span style="color:#0033ff">void</span>)pUserData;
ma_libvorbis_uninit(pVorbis, pAllocationCallbacks);
ma_free(pVorbis, pAllocationCallbacks);
}
<span style="color:#0033ff">static</span> <span style="color:#0099cc">ma_result</span> ma_decoding_backend_get_channel_map__libvorbis(<span style="color:#0033ff">void</span>* pUserData, <span style="color:#0099cc">ma_data_source</span>* pBackend, <span style="color:#0099cc">ma_channel</span>* pChannelMap, size_t channelMapCap)
{
ma_libvorbis* pVorbis = (ma_libvorbis*)pBackend;
(<span style="color:#0033ff">void</span>)pUserData;
<span style="color:#0033ff">return</span> ma_libvorbis_get_data_format(pVorbis, NULL, NULL, NULL, pChannelMap, channelMapCap);
}
<span style="color:#0033ff">static</span> ma_decoding_backend_vtable g_ma_decoding_backend_vtable_libvorbis =
{
ma_decoding_backend_init__libvorbis,
ma_decoding_backend_init_file__libvorbis,
NULL, <span style="color:#009900">/* onInitFileW() */</span>
NULL, <span style="color:#009900">/* onInitMemory() */</span>
ma_decoding_backend_uninit__libvorbis
};
<span style="color:#0033ff">static</span> <span style="color:#0099cc">ma_result</span> ma_decoding_backend_init__libopus(<span style="color:#0033ff">void</span>* pUserData, ma_read_proc onRead, ma_seek_proc onSeek, ma_tell_proc onTell, <span style="color:#0033ff">void</span>* pReadSeekTellUserData, <span style="color:#0033ff">const</span> ma_decoding_backend_config* pConfig, <span style="color:#0033ff">const</span> ma_allocation_callbacks* pAllocationCallbacks, <span style="color:#0099cc">ma_data_source</span>** ppBackend)
{
<span style="color:#0099cc">ma_result</span> result;
ma_libopus* pOpus;
(<span style="color:#0033ff">void</span>)pUserData;
pOpus = (ma_libopus*)ma_malloc(<span style="color:#0033ff">sizeof</span>(*pOpus), pAllocationCallbacks);
<span style="color:#0033ff">if</span> (pOpus == NULL) {
<span style="color:#0033ff">return</span> MA_OUT_OF_MEMORY;
}
result = ma_libopus_init(onRead, onSeek, onTell, pReadSeekTellUserData, pConfig, pAllocationCallbacks, pOpus);
<span style="color:#0033ff">if</span> (result != MA_SUCCESS) {
ma_free(pOpus, pAllocationCallbacks);
<span style="color:#0033ff">return</span> result;
}
*ppBackend = pOpus;
<span style="color:#0033ff">return</span> MA_SUCCESS;
}
<span style="color:#0033ff">static</span> <span style="color:#0099cc">ma_result</span> ma_decoding_backend_init_file__libopus(<span style="color:#0033ff">void</span>* pUserData, <span style="color:#0033ff">const</span> <span style="color:#0033ff">char</span>* pFilePath, <span style="color:#0033ff">const</span> ma_decoding_backend_config* pConfig, <span style="color:#0033ff">const</span> ma_allocation_callbacks* pAllocationCallbacks, <span style="color:#0099cc">ma_data_source</span>** ppBackend)
{
<span style="color:#0099cc">ma_result</span> result;
ma_libopus* pOpus;
(<span style="color:#0033ff">void</span>)pUserData;
pOpus = (ma_libopus*)ma_malloc(<span style="color:#0033ff">sizeof</span>(*pOpus), pAllocationCallbacks);
<span style="color:#0033ff">if</span> (pOpus == NULL) {
<span style="color:#0033ff">return</span> MA_OUT_OF_MEMORY;
}
result = ma_libopus_init_file(pFilePath, pConfig, pAllocationCallbacks, pOpus);
<span style="color:#0033ff">if</span> (result != MA_SUCCESS) {
ma_free(pOpus, pAllocationCallbacks);
<span style="color:#0033ff">return</span> result;
}
*ppBackend = pOpus;
<span style="color:#0033ff">return</span> MA_SUCCESS;
}
<span style="color:#0033ff">static</span> <span style="color:#0033ff">void</span> ma_decoding_backend_uninit__libopus(<span style="color:#0033ff">void</span>* pUserData, <span style="color:#0099cc">ma_data_source</span>* pBackend, <span style="color:#0033ff">const</span> ma_allocation_callbacks* pAllocationCallbacks)
{
ma_libopus* pOpus = (ma_libopus*)pBackend;
(<span style="color:#0033ff">void</span>)pUserData;
ma_libopus_uninit(pOpus, pAllocationCallbacks);
ma_free(pOpus, pAllocationCallbacks);
}
<span style="color:#0033ff">static</span> <span style="color:#0099cc">ma_result</span> ma_decoding_backend_get_channel_map__libopus(<span style="color:#0033ff">void</span>* pUserData, <span style="color:#0099cc">ma_data_source</span>* pBackend, <span style="color:#0099cc">ma_channel</span>* pChannelMap, size_t channelMapCap)
{
ma_libopus* pOpus = (ma_libopus*)pBackend;
(<span style="color:#0033ff">void</span>)pUserData;
<span style="color:#0033ff">return</span> ma_libopus_get_data_format(pOpus, NULL, NULL, NULL, pChannelMap, channelMapCap);
}
<span style="color:#0033ff">static</span> ma_decoding_backend_vtable g_ma_decoding_backend_vtable_libopus =
{
ma_decoding_backend_init__libopus,
ma_decoding_backend_init_file__libopus,
NULL, <span style="color:#009900">/* onInitFileW() */</span>
NULL, <span style="color:#009900">/* onInitMemory() */</span>
ma_decoding_backend_uninit__libopus
};
<span style="color:#0033ff">int</span> main(<span style="color:#0033ff">int</span> argc, <span style="color:#0033ff">char</span>** argv)
{
@@ -431,10 +281,10 @@ example (via libopus).</p>
Add your custom backend vtables here. The order in the array defines the order of priority. The
vtables will be passed in to the resource manager config.
*/</span>
ma_decoding_backend_vtable* pCustomBackendVTables[] =
<span style="color:#0033ff">const</span> ma_decoding_backend_vtable* pCustomBackendVTables[] =
{
&amp;g_ma_decoding_backend_vtable_libvorbis,
&amp;g_ma_decoding_backend_vtable_libopus
ma_decoding_backend_libvorbis,
ma_decoding_backend_libopus
};
@@ -480,7 +330,8 @@ example (via libopus).</p>
getchar();
<span style="color:#0033ff">return</span> 0;
}</pre></div></td>
}
</pre></div></td>
</tr></table>
</div>
<table style="margin:0 auto; padding:1em 0px; text-align:center;">
@@ -493,7 +344,7 @@ example (via libopus).</p>
</table>
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Copyright &copy; 2023 David Reid<br/>
Copyright &copy; 2025 David Reid<br/>
Developed by David Reid - <a class="footer-link" href="mailto:mackron@gmail.com">mackron@gmail.com</a>
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