Implement libswresample support as an alternative to libavresample, which is deprecated

CMakeLists.txt

@@ -607,7 +607,23 @@ if(NOT ZM_NO_FFMPEG)
 		set(optlibsnotfound "${optlibsnotfound} SWScale")
 	endif(SWSCALE_LIBRARIES)
 
-	# rescale (using find_library and find_path)
+  # SWresample (using find_library and find_path)
+  find_library(SWRESAMPLE_LIBRARIES swresample)
+  if(SWRESAMPLE_LIBRARIES)
+    set(HAVE_LIBSWRESAMPLE 1)
+    list(APPEND ZM_BIN_LIBS "${SWRESAMPLE_LIBRARIES}")
+    find_path(SWRESAMPLE_INCLUDE_DIR "libswresample/swresample.h" /usr/include/ffmpeg)
+    if(SWRESAMPLE_INCLUDE_DIR)
+      include_directories("${SWRESAMPLE_INCLUDE_DIR}")
+      set(CMAKE_REQUIRED_INCLUDES "${SWRESAMPLE_INCLUDE_DIR}")
+    endif(SWRESAMPLE_INCLUDE_DIR)
+    mark_as_advanced(FORCE SWRESAMPLE_LIBRARIES SWRESAMPLE_INCLUDE_DIR)
+    check_include_file("libswresample/swresample.h" HAVE_LIBSWRESAMPLE_SWRESAMPLE_H)
+    set(optlibsfound "${optlibsfound} SWResample")
+  else(SWRESAMPLE_LIBRARIES)
+    set(optlibsnotfound "${optlibsnotfound} SWResample")
+
+    # AVresample (using find_library and find_path)
     find_library(AVRESAMPLE_LIBRARIES avresample)
     if(AVRESAMPLE_LIBRARIES)
       set(HAVE_LIBAVRESAMPLE 1)
@@ -624,6 +640,8 @@ if(NOT ZM_NO_FFMPEG)
       set(optlibsnotfound "${optlibsnotfound} AVResample")
     endif(AVRESAMPLE_LIBRARIES)
 
+  endif(SWRESAMPLE_LIBRARIES)
+
 	# Find the path to the ffmpeg executable
 	find_program(FFMPEG_EXECUTABLE 
 		NAMES ffmpeg avconv

distros/ubuntu1604/control

@@ -10,6 +10,7 @@ Build-Depends: debhelper (>= 9), dh-systemd, python-sphinx | python3-sphinx, apa
               ,libavcodec-dev (>= 6:10~)
               ,libavformat-dev  (>= 6:10~)
               ,libavutil-dev (>= 6:10~)
+              ,libswresample-dev
               ,libswscale-dev (>= 6:10~)
               ,ffmpeg | libav-tools
               ,net-tools
@@ -41,7 +42,9 @@ Package: zoneminder
 Architecture: any
 Depends: ${shlibs:Depends}, ${misc:Depends}, ${perl:Depends}
         ,javascript-common
-        ,libmp4v2-2, libx264-142|libx264-148|libx264-152, libswscale-ffmpeg3|libswscale4|libswscale3|libswscale5
+        ,libmp4v2-2, libx264-142|libx264-148|libx264-152
+        ,libswscale-ffmpeg3|libswscale4|libswscale3|libswscale5
+        ,libswresample2|libswresample3|libswresample24
         ,ffmpeg | libav-tools
         ,libdate-manip-perl, libmime-lite-perl, libmime-tools-perl
         ,libdbd-mysql-perl

src/zm_videostore.cpp

@@ -205,7 +205,7 @@ VideoStore::VideoStore(const char *filename_in, const char *format_in,
   audio_out_stream = NULL;
   in_frame = NULL;
   out_frame = NULL;
-#ifdef HAVE_LIBAVRESAMPLE
+#if defined(HAVE_LIBSWRESAMPLE) || defined(HAVE_LIBAVRESAMPLE)
   resample_ctx = NULL;
 #endif
 
@@ -241,8 +241,6 @@ VideoStore::VideoStore(const char *filename_in, const char *format_in,
         Error("Unable to create audio out stream");
         audio_out_stream = NULL;
       } else {
-        Debug(2, "setting parameters");
-
 #if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
         audio_out_ctx = avcodec_alloc_context3(audio_out_codec);
         // Copy params from instream to ctx
@@ -466,10 +464,16 @@ VideoStore::~VideoStore() {
     avcodec_free_context(&audio_out_ctx);
 #endif
     audio_out_ctx = NULL;
-#ifdef HAVE_LIBAVRESAMPLE
+#if defined(HAVE_LIBAVRESAMPLE) || defined(HAVE_LIBSWRESAMPLE)
     if ( resample_ctx ) {
+#if defined(HAVE_LIBSWRESAMPLE)
+      swr_free(&resample_ctx);
+#else
+#if defined(HAVE_LIBAVRESAMPLE)
       avresample_close(resample_ctx);
       avresample_free(&resample_ctx);
+#endif
+#endif
     }
     if ( in_frame ) {
       av_frame_free(&in_frame);
@@ -491,7 +495,12 @@ VideoStore::~VideoStore() {
 } // VideoStore::~VideoStore()
 
 bool VideoStore::setup_resampler() {
-#ifdef HAVE_LIBAVRESAMPLE
+#if !defined(HAVE_LIBSWRESAMPLE) && !defined(HAVE_LIBAVRESAMPLE)
+  Error(
+     "Not built with resample library. "
+     "Cannot do audio conversion to AAC");
+  return false;
+#else
 
 #if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
   // Newer ffmpeg wants to keep everything separate... so have to lookup our own
@@ -499,8 +508,7 @@ bool VideoStore::setup_resampler() {
   audio_in_codec =
       avcodec_find_decoder(audio_in_stream->codecpar->codec_id);
 #else
-  audio_in_codec =
+  audio_in_codec = avcodec_find_decoder(audio_in_ctx->codec_id);
-      avcodec_find_decoder(audio_in_ctx->codec_id);
 #endif
   ret = avcodec_open2(audio_in_ctx, audio_in_codec, NULL);
   if ( ret < 0 ) {
@@ -531,6 +539,9 @@ bool VideoStore::setup_resampler() {
   audio_out_stream = avformat_new_stream(oc, NULL);
   audio_out_ctx = audio_out_stream->codec;
 #endif
+  // Some formats (i.e. WAV) do not produce the proper channel layout
+  if ( audio_in_ctx->channel_layout == 0 )
+    audio_in_ctx->channel_layout = av_get_channel_layout("mono");
 
   /* put sample parameters */
   audio_out_ctx->bit_rate = audio_in_ctx->bit_rate;
@@ -622,34 +633,49 @@ bool VideoStore::setup_resampler() {
     return false;
   }
 
+#if defined(HAVE_LIBSWRESAMPLE)
+  resample_ctx = swr_alloc_set_opts(NULL,
+      av_get_default_channel_layout(audio_out_ctx->channels),
+      audio_out_ctx->sample_fmt,
+      audio_out_ctx->sample_rate,
+      av_get_default_channel_layout(audio_in_ctx->channels),
+      audio_in_ctx->sample_fmt,
+      audio_in_ctx->sample_rate,
+      0, NULL);
+  if ( !resample_ctx ) {
+    Error("Could not allocate resample context");
+    av_frame_free(&in_frame);
+    av_frame_free(&out_frame);
+    return false;
+  }
+  if ( (ret = swr_init(resample_ctx)) < 0 ) {
+    Error("Could not open resampler");
+    av_frame_free(&in_frame);
+    av_frame_free(&out_frame);
+    swr_free(&resample_ctx);
+    return false;
+  }
+#else
+#if defined(HAVE_LIBAVRESAMPLE)
   // Setup the audio resampler
   resample_ctx = avresample_alloc_context();
   if ( !resample_ctx ) {
     Error("Could not allocate resample ctx");
+    av_frame_free(&in_frame);
+    av_frame_free(&out_frame);
     return false;
   }
 
-  // Some formats (i.e. WAV) do not produce the proper channel layout
-  uint64_t layout = av_get_channel_layout("mono");
-  if ( audio_in_ctx->channel_layout == 0 ) {
-    av_opt_set_int(resample_ctx, "in_channel_layout", layout, 0);
-    Debug(1, "Bad in channel layout. Need to set it to mono (%d).", layout);
-  } else {
   av_opt_set_int(resample_ctx, "in_channel_layout",
       audio_in_ctx->channel_layout, 0);
-    layout = audio_in_ctx->channel_layout;
-  }
-
   av_opt_set_int(resample_ctx, "in_sample_fmt",
       audio_in_ctx->sample_fmt, 0);
   av_opt_set_int(resample_ctx, "in_sample_rate",
       audio_in_ctx->sample_rate, 0);
-  av_opt_set_int(resample_ctx, "in_channels", audio_in_ctx->channels,
+  av_opt_set_int(resample_ctx, "in_channels",
-                 0);
+      audio_in_ctx->channels, 0);
-  // av_opt_set_int( resample_ctx, "out_channel_layout",
-  // audio_out_ctx->channel_layout, 0);
   av_opt_set_int(resample_ctx, "out_channel_layout",
-                 layout, 0);
+      audio_in_ctx->channel_layout, 0);
   av_opt_set_int(resample_ctx, "out_sample_fmt",
       audio_out_ctx->sample_fmt, 0);
   av_opt_set_int(resample_ctx, "out_sample_rate",
@@ -664,6 +690,8 @@ bool VideoStore::setup_resampler() {
   } else {
     Debug(2, "Success opening resampler");
   }
+#endif
+#endif
 
   out_frame->nb_samples = audio_out_ctx->frame_size;
   out_frame->format = audio_out_ctx->sample_fmt;
@@ -694,11 +722,6 @@ bool VideoStore::setup_resampler() {
   }
 
   return true;
-#else
-  Error(
-      "Not built with libavresample library. Cannot do audio conversion to "
-      "AAC");
-  return false;
 #endif
 }  // end bool VideoStore::setup_resampler()
 
@@ -858,7 +881,7 @@ int VideoStore::writeAudioFramePacket(AVPacket *ipkt) {
 
   if ( audio_out_codec ) {
     Debug(3, "Have audio codec");
-#ifdef HAVE_LIBAVRESAMPLE
+#if defined(HAVE_LIBSWRESAMPLE) || defined(HAVE_LIBAVRESAMPLE)
 
   #if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
     ret = avcodec_send_packet(audio_in_ctx, ipkt);
@@ -902,6 +925,19 @@ int VideoStore::writeAudioFramePacket(AVPacket *ipkt) {
 
     // Resample the in into the audioSampleBuffer until we proceed the whole
     // decoded data
+  #if defined(HAVE_LIBSWRESAMPLE)
+    Debug(2, "Converting  %d to %d samples", in_frame->nb_samples, out_frame->nb_samples);
+    if ((ret = swr_convert(resample_ctx,
+            out_frame->data, frame_size,
+            (const uint8_t**)in_frame->data,
+            in_frame->nb_samples)) < 0) {
+      Error("Could not resample frame (error '%s')\n",
+            av_make_error_string(ret).c_str());
+      av_frame_unref(in_frame);
+      return 0;
+    }
+  #else
+    #if defined(HAVE_LIBAVRESAMPLE)
     if ((ret =
              avresample_convert(resample_ctx, NULL, 0, 0, in_frame->data,
                                 0, in_frame->nb_samples)) < 0) {
@@ -910,8 +946,11 @@ int VideoStore::writeAudioFramePacket(AVPacket *ipkt) {
       av_frame_unref(in_frame);
       return 0;
     }
+  #endif
+  #endif
     av_frame_unref(in_frame);
 
+  #if defined(HAVE_LIBAVRESAMPLE)
     int samples_available = avresample_available(resample_ctx);
 
     if (samples_available < frame_size) {
@@ -926,6 +965,7 @@ int VideoStore::writeAudioFramePacket(AVPacket *ipkt) {
       Warning("Error reading resampled audio: ");
       return 0;
     }
+  #endif
     Debug(2,
           "Frame: samples(%d), format(%d), sample_rate(%d), channel layout(%d)",
           out_frame->nb_samples, out_frame->format,
@@ -972,7 +1012,8 @@ int VideoStore::writeAudioFramePacket(AVPacket *ipkt) {
       return 0;
     }
   #endif
-
+#else
+    Error("Have audio codec but no resampler?!");
 #endif
   } else {
     av_init_packet(&opkt);

src/zm_videostore.h

@@ -3,9 +3,13 @@
 
 #include "zm_ffmpeg.h"
 extern "C"  {
+#ifdef HAVE_LIBSWRESAMPLE
+  #include "libswresample/swresample.h"
+#else
   #ifdef HAVE_LIBAVRESAMPLE
     #include "libavresample/avresample.h"
   #endif
+#endif
 }
 
 #if HAVE_LIBAVCODEC
@@ -38,8 +42,12 @@ private:
   // The following are used when encoding the audio stream to AAC
   AVCodec *audio_out_codec;
   AVCodecContext *audio_out_ctx;
+#ifdef HAVE_LIBSWRESAMPLE
+  SwrContext *resample_ctx;
+#else
 #ifdef HAVE_LIBAVRESAMPLE
   AVAudioResampleContext* resample_ctx;
+#endif
 #endif
   uint8_t *converted_in_samples;
     

zoneminder-config.cmake

@@ -54,6 +54,8 @@
 #cmakedefine HAVE_LIBAVUTIL_HWCONTEXT_H 0
 #cmakedefine HAVE_LIBSWSCALE 1
 #cmakedefine HAVE_LIBSWSCALE_SWSCALE_H 1
+#cmakedefine HAVE_LIBSWRESAMPLE 1
+#cmakedefine HAVE_LIBSWRESAMPLE_SWRESAMPLE_H 1
 #cmakedefine HAVE_LIBAVRESAMPLE 1
 #cmakedefine HAVE_LIBAVRESAMPLE_AVRESAMPLE_H 1
 #cmakedefine HAVE_LIBVLC 1