sfinfo

CMakeLists.txt

@@ -76,6 +76,7 @@ endif()
 
 target_link_libraries(play.file_tilde PRIVATE ffmpeg)
 target_link_libraries(sfload PRIVATE ffmpeg)
+target_link_libraries(sfinfo PRIVATE ffmpeg)
 
 target_link_libraries(pdlink PUBLIC link)
 target_link_libraries(pdlink_tilde PUBLIC link opus)

Documentation/Help-files/sfinfo-help.pd

@@ -0,0 +1,41 @@
+#N canvas 552 38 569 462 10;
+#X obj 306 5 cnv 15 250 40 empty empty empty 12 13 0 18 #7c7c7c #e0e4dc 0;
+#X obj 345 12 cnv 10 10 10 empty empty ELSE 0 15 2 30 #7c7c7c #e0e4dc 0;
+#X obj 23 41 cnv 4 4 4 empty empty Query\ sound\ file\ information 0 28 2 18 #e0e0e0 #000000 0;
+#X obj 458 12 cnv 10 10 10 empty empty EL 0 6 2 13 #7c7c7c #e0e4dc 0;
+#X obj 478 12 cnv 10 10 10 empty empty Locus 0 6 2 13 #7c7c7c #e0e4dc 0;
+#X obj 515 12 cnv 10 10 10 empty empty Solus' 0 6 2 13 #7c7c7c #e0e4dc 0;
+#X obj 464 27 cnv 10 10 10 empty empty ELSE 0 6 2 13 #7c7c7c #e0e4dc 0;
+#X obj 502 27 cnv 10 10 10 empty empty library 0 6 2 13 #7c7c7c #e0e4dc 0;
+#N canvas 0 22 450 278 (subpatch) 0;
+#X coords 0 1 100 -1 252 42 1 0 0;
+#X restore 305 4 graph;
+#X obj 3 4 cnv 15 301 42 empty empty sfinfo 20 20 2 37 #e0e0e0 #000000 0;
+#N canvas 0 22 450 278 (subpatch) 0;
+#X coords 0 1 100 -1 302 42 1;
+#X restore 2 4 graph;
+#X obj 7 413 cnv 15 552 21 empty empty empty 20 12 0 14 #e0e0e0 #202020 0;
+#X obj 7 291 cnv 3 550 3 empty empty inlets 8 12 0 13 #dcdcdc #000000 0;
+#X obj 7 342 cnv 3 550 3 empty empty outlets 8 12 0 13 #dcdcdc #000000 0;
+#X obj 7 378 cnv 3 550 3 empty empty arguments 8 12 0 13 #dcdcdc #000000 0;
+#X obj 130 300 cnv 17 3 32 empty empty 0 5 9 0 16 #dcdcdc #9c9c9c 0;
+#X obj 290 154 loadbang;
+#X obj 130 355 cnv 17 3 17 empty empty 0 5 9 0 16 #dcdcdc #9c9c9c 0;
+#X text 121 150 see also:;
+#X obj 121 194 else/play.file~;
+#X obj 121 214 else/player~;
+#X obj 121 234 else/sample~;
+#X text 74 87 [sfinfo] supports all files that [sfload] and [play.file~] support and can be used to query file sample information but only channels so far as this object is still very experimental)., f 71;
+#X obj 121 174 else/sfload;
+#X msg 290 179 read bubul.mp3 \, channels;
+#X obj 290 207 else/sfinfo;
+#X obj 290 228 route channels;
+#X floatatom 290 251 5 0 0 0 - - - 0;
+#X text 164 301 read <symbol> - read sound file;
+#X text 246 391 none;
+#X text 194 354 anything - sound file's information;
+#X text 195 316 channels - query for number of channels;
+#X connect 16 0 24 0;
+#X connect 24 0 25 0;
+#X connect 25 0 26 0;
+#X connect 26 0 27 0;

Source/Control/sfinfo.c

@@ -0,0 +1,100 @@
+
+#include <m_pd.h>
+#include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
+#include <libswresample/swresample.h>
+
+static t_class *sfinfo_class;
+
+typedef struct _sfinfo {
+    t_object        x_obj;
+    t_outlet       *x_info_outlet;
+    AVFormatContext *x_ic;
+    t_canvas       *x_canvas;
+    char            x_path[MAXPDSTRING];
+    t_atom          x_info[1];
+    int             x_opened;
+}t_sfinfo;
+
+void* sfinfo_nchs(t_sfinfo *x){
+    if(!x->x_opened){
+        pd_error(x, "[sfinfo]: No file loaded");
+        return(NULL);
+    }
+    x->x_ic = avformat_alloc_context();
+    if(avformat_open_input(&x->x_ic, x->x_path, NULL, NULL) != 0){
+        pd_error(x, "[sfinfo]: Could not open file '%s'", x->x_path);
+        return(NULL);
+    }
+    if (avformat_find_stream_info(x->x_ic, NULL) < 0) {
+        pd_error(x, "[sfinfo]: Could not find stream information");
+        avformat_close_input(&x->x_ic);
+        return(NULL);
+    }
+    int audio_stream_index = -1;
+    for(unsigned int i = 0; i < x->x_ic->nb_streams; i++){
+        if(x->x_ic->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO){
+            audio_stream_index = i;
+            break;
+        }
+    }
+    if(audio_stream_index == -1){
+        pd_error(x, "[sfinfo]: Could not find any audio stream in the file");
+        avformat_close_input(&x->x_ic);
+        return(NULL);
+    }
+    AVStream *audio_stream = x->x_ic->streams[audio_stream_index];
+    // Use AVChannelLayout to determine the number of channels
+    AVChannelLayout layout = {0}; // Initialize the layout
+    if(audio_stream->codecpar->ch_layout.u.mask)
+        av_channel_layout_from_mask(&layout, audio_stream->codecpar->ch_layout.u.mask);
+    else
+        av_channel_layout_default(&layout, audio_stream->codecpar->ch_layout.nb_channels);
+    unsigned int num_channels = layout.nb_channels;
+    // Clean up
+    av_channel_layout_uninit(&layout);
+    avformat_close_input(&x->x_ic);
+    // Output the number of channels
+    SETFLOAT(x->x_info + 0, (t_float)num_channels);
+    outlet_anything(x->x_info_outlet, gensym("channels"), 1, x->x_info);
+    return(NULL);
+}
+
+static int sfinfo_find_file(t_sfinfo *x, t_symbol *file, char *dir_out) {
+    static char fname[MAXPDSTRING];
+    char *bufptr;
+    int fd = canvas_open(x->x_canvas, file->s_name, "", fname, &bufptr, MAXPDSTRING, 1);
+    if(fd < 0){
+        pd_error(x, "[sfinfo] file '%s' not found", file->s_name);
+        return(0);
+    }
+    else if(bufptr > fname){
+        bufptr[-1] = '/';
+        strcpy(dir_out, fname);
+    }
+    return(1);
+}
+
+void sfinfo_read(t_sfinfo* x, t_symbol* file){
+    x->x_opened = sfinfo_find_file(x, file, x->x_path);
+}
+
+static void sfinfo_free(t_sfinfo *x) {
+    if(x->x_ic)
+        avformat_close_input(&x->x_ic);
+}
+
+static void *sfinfo_new(t_symbol *s, int ac, t_atom *av) {
+    t_sfinfo *x = (t_sfinfo *)pd_new(sfinfo_class);
+    x->x_ic = NULL;
+    x->x_canvas = canvas_getcurrent();
+    x->x_info_outlet = outlet_new(&x->x_obj, &s_list);
+    return(x);
+}
+
+void sfinfo_setup(void) {
+    sfinfo_class = class_new(gensym("sfinfo"), (t_newmethod)sfinfo_new,
+        (t_method)sfinfo_free, sizeof(t_sfinfo), 0, A_GIMME, 0);
+    class_addmethod(sfinfo_class, (t_method)sfinfo_read, gensym("read"), A_SYMBOL, 0);
+    class_addmethod(sfinfo_class, (t_method)sfinfo_nchs, gensym("channels"), 0);
+}

Source/Control/sfload.c

@@ -120,8 +120,6 @@ void* sfload_read_audio(void *arg){ // read audio into array
     SETFLOAT(x->x_sfinfo + 1, x->x_stream_ctx->sample_rate);
     SETFLOAT(x->x_sfinfo + 2, nch);
     SETFLOAT(x->x_sfinfo + 3, av_get_bytes_per_sample(x->x_stream_ctx->sample_fmt) * 8);
-//    SETFLOAT(x->x_sfinfo + 4, loop_start_entry ? atoi(loop_start_entry->value) : 0);
-//    SETFLOAT(x->x_sfinfo + 5, loop_end_entry ? atoi(loop_end_entry->value) : output_index);
     x->x_num_channels = nch;
     x->x_result_ready = output_index;
     for(unsigned int ch = 0; ch < nch; ch++)