DATV modulator: fixed write_packet_cb prototype depending on FF_API_AVIO_WRITE_NONCONST value. Fixes PR #2586

Author: f4exb

plugins/channeltx/moddatv/tsgenerator.cpp

@@ -376,7 +376,11 @@ void TSGenerator::encode_frame_to_ts(AVFormatContext* oc, AVCodecContext* codec_
 }
 
 // Write callback - stores TS packets in memory
+#if FF_API_AVIO_WRITE_NONCONST
 int TSGenerator::write_packet_cb(void* opaque, uint8_t* buf, int buf_size)
+#else
+int TSGenerator::write_packet_cb(void* opaque, const uint8_t* buf, int buf_size)
+#endif
 {
     std::vector<uint8_t>* buffer = static_cast<std::vector<uint8_t>*>(opaque);
     buffer->insert(buffer->end(), buf, buf + buf_size);

plugins/channeltx/moddatv/tsgenerator.h

@@ -67,7 +67,11 @@ class TSGenerator
     int setup_ts_context(AVFormatContext** oc, AVCodecContext* codec_ctx);
     void encode_frame_to_ts(AVFormatContext* oc, AVCodecContext* codec_ctx, AVFrame* frame, int stream_idx = 0);
     std::pair<const AVCodec*, AVCodecContext*> create_codec_context(int fps, int bitrate, int width, int height, int duration_sec);
+#if FF_API_AVIO_WRITE_NONCONST
     static int write_packet_cb(void* opaque, uint8_t* buf, int buf_size);
+#else
+    static int write_packet_cb(void* opaque, const uint8_t* buf, int buf_size);
+#endif
     static int read_packet_cb(void* opaque, uint8_t* buf, int buf_size);
     static int64_t seek_cb(void* opaque, int64_t offset, int whence);
     static double get_dvbs2_rate(double symbol_rate, DATVModSettings::DATVModulation modulation, DATVModSettings::DATVCodeRate code_rate);