Cleanups + allow audio only playback

2 files changed, 147 insertions, 0 deletions

diff --git a/examples/example_audio.c b/examples/example_audio.c
new file mode 100644
index 0000000..d7fdd2a
--- /dev/null
+++ b/examples/example_audio.c
@@ -0,0 +1,140 @@
+#include <kitchensink/kitchensink.h>
+#include <SDL2/SDL.h>
+#include <stdio.h>
+#include <stdbool.h>
+
+/*
+* Requires SDL2 2.0.4 !
+*
+* Note! This example does not do proper error handling etc.
+* It is for example use only!
+*/
+
+#define AUDIOBUFFER_SIZE 8192
+
+const char *stream_types[] = {
+    "KIT_STREAMTYPE_UNKNOWN",
+    "KIT_STREAMTYPE_VIDEO",
+    "KIT_STREAMTYPE_AUDIO",
+    "KIT_STREAMTYPE_DATA",
+    "KIT_STREAMTYPE_SUBTITLE",
+    "KIT_STREAMTYPE_ATTACHMENT"
+};
+
+int main(int argc, char *argv[]) {
+    int err = 0, ret = 0;
+    const char* filename = NULL;
+
+    // Events
+    bool run = true;
+    
+    // Kitchensink
+    Kit_Source *src = NULL;
+    Kit_Player *player = NULL;
+
+    // Audio playback
+    SDL_AudioSpec wanted_spec, audio_spec;
+    SDL_AudioDeviceID audio_dev;
+    char audiobuf[AUDIOBUFFER_SIZE];
+
+    // Get filename to open
+    if(argc != 2) {
+        fprintf(stderr, "Usage: exampleplay <filename>\n");
+        return 0;
+    }
+    filename = argv[1];
+
+    // Init SDL
+    err = SDL_Init(SDL_INIT_AUDIO);
+    if(err != 0) {
+        fprintf(stderr, "Unable to initialize SDL!\n");
+        return 1;
+    }
+
+    Kit_Init(KIT_INIT_FORMATS|KIT_INIT_NETWORK);
+
+    // Open up the sourcefile.
+    src = Kit_CreateSourceFromUrl(filename);
+    if(src == NULL) {
+        fprintf(stderr, "Unable to load file '%s': %s\n", filename, Kit_GetError());
+        return 1;
+    }
+
+    // Print stream information
+    Kit_StreamInfo sinfo;
+    fprintf(stderr, "Source streams:\n");
+    for(int i = 0; i < Kit_GetSourceStreamCount(src); i++) {
+        err = Kit_GetSourceStreamInfo(src, &sinfo, i);
+        if(err) {
+            fprintf(stderr, "Unable to fetch stream #%d information: %s.\n", i, Kit_GetError());
+            return 1;
+        }
+        fprintf(stderr, " * Stream #%d: %s\n", i, stream_types[sinfo.type]);
+    }
+
+    // Create the player
+    player = Kit_CreatePlayer(src);
+    if(player == NULL) {
+        fprintf(stderr, "Unable to create player: %s\n", Kit_GetError());
+        return 1;
+    }
+
+    // Print some information
+    Kit_PlayerInfo pinfo;
+    Kit_GetPlayerInfo(player, &pinfo);
+
+    if(!pinfo.audio.is_enabled) {
+        fprintf(stderr, "File contains no audio!\n");
+        return 1;
+    }
+
+    fprintf(stderr, "Media information:\n");
+    fprintf(stderr, " * Audio: %s (%s), %dHz, %dch, %db, %s\n",
+        pinfo.acodec,
+        pinfo.acodec_name,
+        pinfo.audio.samplerate,
+        pinfo.audio.channels,
+        pinfo.audio.bytes,
+        pinfo.audio.is_signed ? "signed" : "unsigned");
+
+    // Init audio
+    SDL_memset(&wanted_spec, 0, sizeof(wanted_spec));
+    wanted_spec.freq = pinfo.audio.samplerate;
+    wanted_spec.format = AUDIO_S16SYS;
+    wanted_spec.channels = pinfo.audio.channels;
+    audio_dev = SDL_OpenAudioDevice(NULL, 0, &wanted_spec, &audio_spec, 0);
+    SDL_PauseAudioDevice(audio_dev, 0);
+
+    // Start playback
+    Kit_PlayerPlay(player);
+
+    while(run) {
+        if(Kit_GetPlayerState(player) == KIT_STOPPED) {
+            run = false;
+            continue;
+        }
+
+        // Refresh audio
+        ret = SDL_GetQueuedAudioSize(audio_dev);
+        if(ret < AUDIOBUFFER_SIZE) {
+            ret = Kit_GetAudioData(player, (unsigned char*)audiobuf, AUDIOBUFFER_SIZE);
+            if(ret > 0) {
+                SDL_LockAudio();
+                SDL_QueueAudio(audio_dev, audiobuf, ret);
+                SDL_UnlockAudio();
+                SDL_PauseAudioDevice(audio_dev, 0);
+            }
+        }
+
+        SDL_Delay(1);
+    }
+
+    SDL_CloseAudioDevice(audio_dev);
+
+    Kit_ClosePlayer(player);
+    Kit_CloseSource(src);
+
+    Kit_Quit();
+    SDL_Quit();
+    return 0;
+}
diff --git a/examples/example_play.c b/examples/example_video.c
index 1f31a6a..1afe957 100644
--- a/examples/example_play.c
+++ b/examples/example_video.c
@@ -132,6 +132,12 @@ int main(int argc, char *argv[]) {
     // Print some information
     Kit_PlayerInfo pinfo;
     Kit_GetPlayerInfo(player, &pinfo);
+
+    if(!pinfo.video.is_enabled) {
+        fprintf(stderr, "File contains no video!\n");
+        return 1;
+    }
+
     fprintf(stderr, "Media information:\n");
     fprintf(stderr, " * Audio: %s (%s), %dHz, %dch, %db, %s\n",
         pinfo.acodec,
@@ -170,6 +176,7 @@ int main(int argc, char *argv[]) {
     // Set logical size for the renderer. This way when we scale, we keep aspect ratio.
     SDL_RenderSetLogicalSize(renderer, pinfo.video.width, pinfo.video.height); 
 
+    // Start playback
     Kit_PlayerPlay(player);
 
     while(run) {