From 440ba17594d17736a56cac0d89be97fb63577989 Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@eclectronics.org>
Date: Mon, 16 Sep 2013 14:31:04 +0100
Subject: ffmpegsource audio loading

---
 rotord/src/libavwrapper.h | 107 ++++++++++++++++++++++++++++++++++++----------
 1 file changed, 84 insertions(+), 23 deletions(-)

(limited to 'rotord/src/libavwrapper.h')

diff --git a/rotord/src/libavwrapper.h b/rotord/src/libavwrapper.h
index 870815f..2f1f31e 100644
--- a/rotord/src/libavwrapper.h
+++ b/rotord/src/libavwrapper.h
@@ -156,68 +156,129 @@ namespace libav {
 
     };
 
-    class ffms2_decoder
+    class video_decoder
     {
         public:
-            ffms2_decoder(){
+            video_decoder(){
                 maybeInitFFMpegLib();
                 pixfmts[0] = FFMS_GetPixFmt("rgb24");
                 pixfmts[1] = -1;
                 h=0;
                 w=0;
-                videosource=NULL;
+                source=NULL;
                 loaded=false;
-                errinfo.Buffer      = errmsg;
-                errinfo.BufferSize  = sizeof(errmsg);
-                errinfo.ErrorType   = FFMS_ERROR_SUCCESS;
-                errinfo.SubType     = FFMS_ERROR_SUCCESS;
+                err.Buffer      = errmsg;
+                err.BufferSize  = sizeof(errmsg);
+                err.ErrorType   = FFMS_ERROR_SUCCESS;
+                err.SubType     = FFMS_ERROR_SUCCESS;
             }
-            ~ffms2_decoder(){
+            ~video_decoder(){
                 cleanup();
             }
             void cleanup();
             bool open(const std::string& filename);
-            float getFrameRate(){
-                if (loaded) return (((float)videoprops->FPSNumerator)/((float)videoprops->FPSDenominator));
+            float get_framerate(){
+                if (loaded) return (((float)props->FPSNumerator)/((float)props->FPSDenominator));
                 else return -1.0f;
             }
-            int getNumberOfFrames(){
-                if (loaded) return videoprops->NumFrames;
+            int get_number_frames(){
+                if (loaded) return props->NumFrames;
                 else return -1;
             }
-            int getNumberOfChannels(){
+            int get_number_channels(){
                 return 3; //this is what we convert to
             }
-            int getWidth(){
+            int get_width(){
                 return w;
             }
-            int getHeight(){
+            int get_height(){
                 return h;
             }
-            bool fetchFrame(int width,int height,int wanted){
-                if (FFMS_SetOutputFormatV2(videosource, pixfmts, width, height, FFMS_RESIZER_BICUBIC, &errinfo)) {
-                    std::cerr<<"ffmpegsource: "<<errinfo.Buffer<<std::endl;
+            bool fetch_frame(int width,int height,int wanted){
+                if (FFMS_SetOutputFormatV2(source, pixfmts, width, height, FFMS_RESIZER_BICUBIC, &err)) {
+                    std::cerr<<"ffmpegsource: "<<err.Buffer<<std::endl;
                     return false;
                 }
-                frame = FFMS_GetFrame(videosource, wanted%videoprops->NumFrames, &errinfo);
+                frame = FFMS_GetFrame(source, wanted%props->NumFrames, &err);
                 if (frame == NULL) {
-                    std::cerr<<"ffmpegsource: "<<errinfo.Buffer<<std::endl;
+                    std::cerr<<"ffmpegsource: "<<err.Buffer<<std::endl;
                     return false;
                 }
                 return true;
 
             }
 
-            FFMS_VideoSource *videosource;
-            FFMS_VideoProperties *videoprops;
+            FFMS_VideoSource *source;
+            FFMS_VideoProperties *props;
             FFMS_Frame *frame;
-            FFMS_ErrorInfo errinfo;
+            FFMS_ErrorInfo err;
             char errmsg[1024];
             int pixfmts[2];
             bool loaded;
             int h,w;
     };
 
+    class audio_decoder
+    {
+        public:
+            audio_decoder(){
+                maybeInitFFMpegLib();
+                source=nullptr;
+                props=nullptr;
+                loaded=false;
+                err.Buffer      = errmsg;
+                err.BufferSize  = sizeof(errmsg);
+                err.ErrorType   = FFMS_ERROR_SUCCESS;
+                err.SubType     = FFMS_ERROR_SUCCESS;
+            }
+            ~audio_decoder(){
+                cleanup();
+            }
+            void cleanup();
+            bool open(const std::string& filename);
+            int get_format(){
+                if (props) return props->SampleFormat;
+                else return 0;
+            }
+            int get_sample_rate(){
+                if (props) return props->SampleRate;
+                else return 0;
+            }
+            int get_bit_depth(){
+                if (props) return props->BitsPerSample;
+                else return 0;
+            }
+            int get_number_channels(){
+                if (props) return props->Channels;
+                else return 0;
+            }
+            int64_t get_channel_layout(){
+                if (props) return props->ChannelLayout;
+                else return 0;
+            }
+            float get_duration(){
+                if (props) return ((float)props->NumSamples)/props->SampleRate;
+                else return 0;
+            }
+            bool get_samples(void *buf,int64_t start, int64_t count){
+                if (source) {
+                    if (FFMS_GetAudio(source, buf, start, count, &err)) {
+                        std::cerr<<"ffmpegsource: "<<err.Buffer<<std::endl;
+                        return false;
+                    }
+                    return true;
+                }
+                return false;
+            }
+
+            FFMS_AudioSource *source;
+            FFMS_AudioProperties *props;
+            FFMS_Frame *frame;
+            FFMS_ErrorInfo err;
+            char errmsg[1024];
+            bool loaded;
+    };
+
 /*
     // TODO - finish refactoring based on
     // http://svn.gnumonks.org/trunk/21c3-video/ffmpeg/ffmpeg-0.4.9-pre1/output_example.c
-- 
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