mirror of
https://github.com/Almamu/linux-wallpaperengine.git
synced 2025-09-14 05:46:48 +08:00
Cleanup and rewrite of the audio resampling code to use non-deprecated code when possible
Signed-off-by: Alexis Maiquez <almamu@almamu.com>
This commit is contained in:
Alexis Maiquez
parent
b79444cdd9
commit
456dd531cf
@ -106,13 +106,15 @@ int64_t audio_seek_data_callback (void* streamarg, int64_t offset, int whence)
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}
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CAudioStream::CAudioStream (CAudioContext* context, const std::string& filename) :
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m_audioContext (context)
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m_audioContext (context),
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m_swrctx (nullptr)
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{
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this->loadCustomContent (filename.c_str ());
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}
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CAudioStream::CAudioStream (CAudioContext* context, const void* buffer, int length) :
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m_audioContext (context)
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m_audioContext (context),
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m_swrctx (nullptr)
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{
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// setup a custom context first
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this->m_formatContext = avformat_alloc_context ();
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@ -145,11 +147,22 @@ CAudioStream::CAudioStream (CAudioContext* context, const void* buffer, int leng
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CAudioStream::CAudioStream(CAudioContext* audioContext, AVCodecContext* context) :
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m_context (context),
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m_queue (new PacketQueue),
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m_audioContext (audioContext)
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m_audioContext (audioContext),
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m_swrctx (nullptr)
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{
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this->initialize ();
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}
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CAudioStream::~CAudioStream()
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{
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if (this->m_swrctx != nullptr && swr_is_initialized (this->m_swrctx) == true)
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swr_close (this->m_swrctx);
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if (this->m_swrctx != nullptr)
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swr_free (&this->m_swrctx);
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// TODO: FREE EVERYTHING ELSE THAT THIS CLASS HOLDS!
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}
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void CAudioStream::loadCustomContent (const char* filename)
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{
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const AVCodec* aCodec = nullptr;
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@ -204,6 +217,51 @@ void CAudioStream::initialize ()
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this->m_queue->packetList = av_fifo_alloc (sizeof (MyAVPacketList));
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#endif
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int64_t out_channel_layout;
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// set output audio channels based on the input audio channels
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switch (this->m_audioContext->getChannels ())
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{
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case 1: out_channel_layout = AV_CH_LAYOUT_MONO; break;
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case 2: out_channel_layout = AV_CH_LAYOUT_STEREO; break;
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default: out_channel_layout = AV_CH_LAYOUT_SURROUND; break;
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}
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#if FF_API_OLD_CHANNEL_LAYOUT
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av_channel_layout_from_mask (&this->m_out_channel_layout, out_channel_layout);
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swr_alloc_set_opts2 (
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&this->m_swrctx,
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&this->m_out_channel_layout,
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this->m_audioContext->getFormat (),
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this->m_audioContext->getSampleRate (),
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&this->m_context->ch_layout,
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this->m_context->sample_fmt,
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this->m_context->sample_rate,
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0,
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nullptr
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);
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#else
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// initialize swrctx
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this->m_swrctx = swr_alloc_set_opts (
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nullptr,
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out_channel_layout,
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this->m_audioContext->getFormat (),
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this->m_audioContext->getSampleRate (),
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this->getContext ()->channel_layout,
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this->getContext ()->sample_fmt,
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this->getContext ()->sample_rate,
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0,
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nullptr
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);
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#endif
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if (this->m_swrctx == nullptr)
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sLog.exception ("Cannot initialize swrctx for audio resampling");
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// initialize the context
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if (swr_init (this->m_swrctx) < 0)
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sLog.exception("Failed to initialize the resampling context.");
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// setup the queue information
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this->m_queue->mutex = SDL_CreateMutex ();
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this->m_queue->cond = SDL_CreateCond ();
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@ -397,10 +455,7 @@ int CAudioStream::resampleAudio (
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uint8_t * out_buf
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)
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{
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SwrContext * swr_ctx = NULL;
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int ret = 0;
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int64_t in_channel_layout = this->getContext ()->channel_layout;
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int64_t out_channel_layout = AV_CH_LAYOUT_STEREO;
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int out_nb_channels = 0;
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int out_linesize = 0;
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int in_nb_samples = 0;
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@ -409,41 +464,6 @@ int CAudioStream::resampleAudio (
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uint8_t ** resampled_data = NULL;
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int resampled_data_size = 0;
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swr_ctx = swr_alloc();
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if (!swr_ctx)
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{
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sLog.error("swr_alloc error.\n");
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return -1;
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}
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// get input audio channels
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in_channel_layout = (this->getContext ()->channels ==
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av_get_channel_layout_nb_channels(this->getContext ()->channel_layout)) ? // 2
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this->getContext ()->channel_layout :
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av_get_default_channel_layout(this->getContext ()->channels);
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// check input audio channels correctly retrieved
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if (in_channel_layout <= 0)
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{
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sLog.error("in_channel_layout error.\n");
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return -1;
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}
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// set output audio channels based on the input audio channels
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if (out_channels == 1)
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{
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out_channel_layout = AV_CH_LAYOUT_MONO;
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}
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else if (out_channels == 2)
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{
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out_channel_layout = AV_CH_LAYOUT_STEREO;
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}
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else
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{
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out_channel_layout = AV_CH_LAYOUT_SURROUND;
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}
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// retrieve number of audio samples (per channel)
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in_nb_samples = decoded_audio_frame->nb_samples;
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if (in_nb_samples <= 0)
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@ -452,63 +472,6 @@ int CAudioStream::resampleAudio (
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return -1;
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}
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// Set SwrContext parameters for resampling
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av_opt_set_int( // 3
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swr_ctx,
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"in_channel_layout",
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in_channel_layout,
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0
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);
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// Set SwrContext parameters for resampling
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av_opt_set_int(
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swr_ctx,
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"in_sample_rate",
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this->getContext ()->sample_rate,
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0
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);
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// Set SwrContext parameters for resampling
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av_opt_set_sample_fmt(
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swr_ctx,
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"in_sample_fmt",
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this->getContext ()->sample_fmt,
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0
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);
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// Set SwrContext parameters for resampling
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av_opt_set_int(
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swr_ctx,
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"out_channel_layout",
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out_channel_layout,
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0
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);
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// Set SwrContext parameters for resampling
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av_opt_set_int(
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swr_ctx,
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"out_sample_rate",
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out_sample_rate,
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0
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);
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// Set SwrContext parameters for resampling
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av_opt_set_sample_fmt(
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swr_ctx,
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"out_sample_fmt",
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out_sample_fmt,
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0
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);
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// Once all values have been set for the SwrContext, it must be initialized
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// with swr_init().
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ret = swr_init(swr_ctx);;
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if (ret < 0)
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{
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sLog.error("Failed to initialize the resampling context.");
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return -1;
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}
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max_out_nb_samples = out_nb_samples = av_rescale_rnd(
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in_nb_samples,
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out_sample_rate,
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@ -524,7 +487,7 @@ int CAudioStream::resampleAudio (
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}
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// get number of output audio channels
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out_nb_channels = av_get_channel_layout_nb_channels(out_channel_layout);
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out_nb_channels = this->getContext ()->ch_layout.nb_channels;
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ret = av_samples_alloc_array_and_samples(
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&resampled_data,
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@ -543,7 +506,7 @@ int CAudioStream::resampleAudio (
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// retrieve output samples number taking into account the progressive delay
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out_nb_samples = av_rescale_rnd(
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swr_get_delay(swr_ctx, this->getContext ()->sample_rate) + in_nb_samples,
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swr_get_delay(this->m_swrctx, this->getContext ()->sample_rate) + in_nb_samples,
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out_sample_rate,
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this->getContext ()->sample_rate,
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AV_ROUND_UP
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@ -583,7 +546,7 @@ int CAudioStream::resampleAudio (
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// do the actual audio data resampling
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ret = swr_convert(
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swr_ctx,
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this->m_swrctx,
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resampled_data,
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out_nb_samples,
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(const uint8_t **) decoded_audio_frame->data,
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@ -628,12 +591,6 @@ int CAudioStream::resampleAudio (
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av_freep(&resampled_data);
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resampled_data = NULL;
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if (swr_ctx)
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{
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// Free the given SwrContext and set the pointer to NULL
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swr_free(&swr_ctx);
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}
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return resampled_data_size;
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}
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@ -25,6 +25,7 @@ namespace WallpaperEngine::Audio
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CAudioStream (CAudioContext* context, const std::string& filename);
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CAudioStream (CAudioContext* context, const void* buffer, int length);
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CAudioStream (CAudioContext* audioContext, AVCodecContext* context);
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~CAudioStream ();
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void queuePacket (AVPacket* pkt);
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@ -64,6 +65,11 @@ namespace WallpaperEngine::Audio
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bool doQueue (AVPacket* pkt);
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void initialize ();
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#if FF_API_OLD_CHANNEL_LAYOUT
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AVChannelLayout m_out_channel_layout;
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#endif
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SwrContext* m_swrctx;
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CAudioContext* m_audioContext;
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bool m_initialized;
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bool m_repeat;
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