sources/gst-plugins/gst-nvmultistream2/gstnvstreammux_audio.h

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/*
 * SPDX-FileCopyrightText: Copyright (c) 2021-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#ifndef __GST_NVSTREAMMUX_AUDIO_H__
#define __GST_NVSTREAMMUX_AUDIO_H__
 
#include "gstnvstreammux_impl.h"
#include "nvbufaudio.h"
 
#define NVSTREAMMUX_BYTES_TO_AUDIOSAMPLESIZE(bytes, channels, bpf) \
        ((bytes) / ( (channels) * (bpf)))
 
#define NVSTREAMMUX_AUDIOSAMPLESIZE_TO_BYTES(samples, channels, bpf) \
        ((samples) * (channels) * (bpf))
 
 
extern "C"
{
static void
audio_mem_buf_unref_callback (gpointer data);
}
 
 
class GstAudioBatchBufferWrapper : public NvDsBatchBufferWrapper
{
 
  public :
    GstAudioBatchBufferWrapper(GstNvStreamMux * mux, unsigned int size, bool is_raw) : NvDsBatchBufferWrapper(size) , is_raw(is_raw), mux(mux), api((GstElement*)mux)
    {
 
        batch = malloc(sizeof(NvBufAudio));
        memset (batch, 0 , sizeof(NvBufAudio));
        ((NvBufAudio *)batch)->audioBuffers = (NvBufAudioParams *)malloc(sizeof(NvBufAudioParams) * size);
        ((NvBufAudio *)batch)->numFilled = 0;
        ((NvBufAudio *)batch)->batchSize = size;
        if(!is_raw)
        {
            gst_buffer =
                gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY, (NvBufAudio *)batch, sizeof (NvBufAudio),
                0, sizeof (NvBufAudio), (void *)this,  audio_mem_buf_unref_callback);
            //gst_buffer_ref(gst_buffer);
        }
        else
        {
            raw_batch = gst_buffer_list_new_sized (size);
        }
    }
 
    void unref() override;
    void reset_batch();
    void dummy(){}
    void copy_meta(unsigned int id, std::shared_ptr<BufferWrapper> src_buffer, unsigned int batch_id, unsigned int frame_number,  unsigned int num_surfaces_per_frame, NvDsBatchMeta * dest_batch_meta, unsigned int source_id) override;
    unsigned int copy_buf(std::shared_ptr<BufferWrapper> src, unsigned int pos) override;
    bool push(SourcePad * src_pad, TimePoint current_play_start, NanoSecondsType accum_dur) override;
    bool push(SourcePad * src_pad, unsigned long pts) override;
    void unref_gst_bufs();
 
    GstBufferList *raw_batch;
    GstBuffer * gst_buffer;
    bool is_raw;
    GstNvStreamMux * mux;
    std::vector<std::shared_ptr<GstBufferWrapper> > gst_in_bufs;
 
    private:
    
    unsigned int copy_buf_impl(std::shared_ptr<BufferWrapper> buf, unsigned int pos);
 
    private:
    GstCommonBufferAPI api;
 
};
 
extern "C"
{
static void
audio_mem_buf_unref_callback (gpointer data)
{
 
    if(data != NULL)
    {
        GstAudioBatchBufferWrapper * batch = (GstAudioBatchBufferWrapper *)data;
        batch->unref_gst_bufs(); 
        delete batch;
    }
 
}
}
 
 
#endif