1 files changed, 257 insertions, 33 deletions

diff --git a/toxav/toxav.c b/toxav/toxav.c
index 0aa88919..75e93bac 100644
--- a/toxav/toxav.c
+++ b/toxav/toxav.c
@@ -90,6 +90,14 @@ typedef struct _CallSpecific {
     pthread_mutex_t mutex;
 } CallSpecific;
 
+typedef struct {
+    int32_t call_index;
+    uint32_t size;
+    uint8_t data[0];
+} DECODE_PACKET;
+
+#define VIDEO_DECODE_QUEUE_SIZE 2
+#define AUDIO_DECODE_QUEUE_SIZE 8
 
 struct _ToxAv {
     Messenger *messenger;
@@ -100,8 +108,18 @@ struct _ToxAv {
     void (*video_callback)(ToxAv *, int32_t, vpx_image_t *);
 
     uint32_t max_calls;
+
+    /* used in the "decode on another thread" system */
+    volatile _Bool exit, decoding;
+    uint8_t video_decode_read, video_decode_write, audio_decode_read, audio_decode_write;
+    pthread_mutex_t decode_cond_mutex;
+    pthread_cond_t decode_cond;
+    DECODE_PACKET *volatile video_decode_queue[VIDEO_DECODE_QUEUE_SIZE];
+    DECODE_PACKET *volatile audio_decode_queue[AUDIO_DECODE_QUEUE_SIZE];
 };
 
+static void *toxav_decoding(void *arg);
+
 static MSICSettings msicsettings_cast (const ToxAvCSettings *from)
 {
     MSICSettings csettings;
@@ -162,6 +180,12 @@ ToxAv *toxav_new( Tox *messenger, int32_t max_calls)
     av->calls = calloc(sizeof(CallSpecific), max_calls);
     av->max_calls = max_calls;
 
+    pthread_mutex_init(&av->decode_cond_mutex, NULL);
+    pthread_cond_init(&av->decode_cond, NULL);
+
+    pthread_t temp;
+    pthread_create(&temp, NULL, toxav_decoding, av);
+
     return av;
 }
 
@@ -173,9 +197,39 @@ ToxAv *toxav_new( Tox *messenger, int32_t max_calls)
  */
 void toxav_kill ( ToxAv *av )
 {
-    int i = 0;
+    int i;
+    DECODE_PACKET *p;
+
+    av->exit = 1;
+    pthread_mutex_lock(&av->decode_cond_mutex);
+    pthread_cond_signal(&av->decode_cond);
 
-    for (; i < av->max_calls; i ++) {
+    if (av->exit) {
+        pthread_cond_wait(&av->decode_cond, &av->decode_cond_mutex);
+    }
+
+    pthread_mutex_unlock(&av->decode_cond_mutex);
+
+    pthread_mutex_destroy(&av->decode_cond_mutex);
+    pthread_cond_destroy(&av->decode_cond);
+
+    for (i = 0; i != VIDEO_DECODE_QUEUE_SIZE; i++) {
+        p = av->video_decode_queue[i];
+
+        if (p) {
+            free(p);
+        }
+    }
+
+    for (i = 0; i != AUDIO_DECODE_QUEUE_SIZE; i++) {
+        p = av->audio_decode_queue[i];
+
+        if (p) {
+            free(p);
+        }
+    }
+
+    for (i = 0; i < av->max_calls; i ++) {
         if ( av->calls[i].crtps[audio_index] )
             rtp_terminate_session(av->calls[i].crtps[audio_index], av->msi_session->messenger_handle);
 
@@ -514,9 +568,37 @@ int toxav_kill_transmission ( ToxAv *av, int32_t call_index )
     call->crtps[video_index] = NULL;
     terminate_queue(call->j_buf);
     call->j_buf = NULL;
+
+
+    pthread_mutex_lock(&av->decode_cond_mutex);
+    int i;
+    DECODE_PACKET *p;
+
+    for (i = 0; i != VIDEO_DECODE_QUEUE_SIZE; i++) {
+        p = av->video_decode_queue[i];
+
+        if (p && p->call_index == call_index) {
+            free(p);
+            av->video_decode_queue[i] = NULL;
+        }
+    }
+
+    for (i = 0; i != AUDIO_DECODE_QUEUE_SIZE; i++) {
+        p = av->audio_decode_queue[i];
+
+        if (p && p->call_index == call_index) {
+            free(p);
+            av->audio_decode_queue[i] = NULL;
+        }
+    }
+
+    while (av->decoding) {} //use a pthread condition?
+
     codec_terminate_session(call->cs);
     call->cs = NULL;
 
+    pthread_mutex_unlock(&av->decode_cond_mutex);
+
     pthread_mutex_unlock(&call->mutex);
     pthread_mutex_destroy(&call->mutex);
 
@@ -835,6 +917,120 @@ int toxav_has_activity(ToxAv *av, int32_t call_index, int16_t *PCM, uint16_t fra
     return energy_VAD(av->calls[call_index].cs, PCM, frame_size, ref_energy);
 }
 
+
+static void decode_video(ToxAv *av, DECODE_PACKET *p)
+{
+    CallSpecific *call = &av->calls[p->call_index];
+
+    int rc = vpx_codec_decode(&call->cs->v_decoder, p->data, p->size, NULL, MAX_DECODE_TIME_US);
+
+    if (rc != VPX_CODEC_OK) {
+        LOGGER_ERROR("Error decoding video: %u %s\n", i, vpx_codec_err_to_string(rc));
+    }
+
+    vpx_codec_iter_t iter = NULL;
+    vpx_image_t *img;
+    img = vpx_codec_get_frame(&call->cs->v_decoder, &iter);
+
+    if (img && av->video_callback) {
+        av->video_callback(av, p->call_index, img);
+    } else {
+        LOGGER_WARNING("Video packet dropped due to missing callback or no image!");
+    }
+
+    free(p);
+}
+
+static void decode_audio(ToxAv *av, DECODE_PACKET *p)
+{
+    int32_t call_index = p->call_index;
+    CallSpecific *call = &av->calls[call_index];
+
+    // ToxAvCSettings csettings;
+    // toxav_get_peer_csettings(av, call_index, 0, &csettings);
+
+    int frame_size = 10000; /* FIXME: not static?  */
+    int16_t dest[frame_size];
+
+    int dec_size = opus_decode(call->cs->audio_decoder, p->data, p->size, dest, frame_size, (p->size == 0));
+    free(p);
+
+    if (dec_size < 0) {
+        LOGGER_WARNING("Decoding error: %s", opus_strerror(dec_size));
+        return;
+    }
+
+    if ( av->audio_callback )
+        av->audio_callback(av, call_index, dest, dec_size);
+    else
+        LOGGER_WARNING("Audio packet dropped due to missing callback!");
+}
+
+static void *toxav_decoding(void *arg)
+{
+    ToxAv *av = arg;
+
+    while (!av->exit) {
+        DECODE_PACKET *p;
+        _Bool video = 0;
+
+        av->decoding = 0;
+        pthread_mutex_lock(&av->decode_cond_mutex);
+        uint8_t r;
+
+        /* first check for available packets, otherwise wait for condition*/
+        r = av->audio_decode_read;
+        p = av->audio_decode_queue[r];
+
+        if (!p) {
+            r = av->video_decode_read;
+            p = av->video_decode_queue[r];
+
+            if (!p) {
+                pthread_cond_wait(&av->decode_cond, &av->decode_cond_mutex);
+                r = av->audio_decode_read;
+                p = av->audio_decode_queue[r];
+
+                if (!p) {
+                    r = av->video_decode_read;
+                    p = av->video_decode_queue[r];
+                    video = 1;
+                }
+            } else {
+                video = 1;
+            }
+        }
+
+        if (video) {
+            if (p) {
+                av->video_decode_queue[r] = NULL;
+                av->video_decode_read = (r + 1) % VIDEO_DECODE_QUEUE_SIZE;
+            }
+        } else {
+            av->audio_decode_queue[r] = NULL;
+            av->audio_decode_read = (r + 1) % AUDIO_DECODE_QUEUE_SIZE;
+        }
+
+        av->decoding = 1;
+        pthread_mutex_unlock(&av->decode_cond_mutex);
+
+        if (p) {
+            if (video) {
+                decode_video(av, p);
+            } else {
+                decode_audio(av, p);
+            }
+        }
+    }
+
+    pthread_mutex_lock(&av->decode_cond_mutex);
+    av->exit = 0;
+    pthread_cond_signal(&av->decode_cond);
+    pthread_mutex_unlock(&av->decode_cond_mutex);
+
+    return NULL;
+}
+
 void toxav_handle_packet(RTPSession *_session, RTPMessage *_msg)
 {
     ToxAv *av = _session->av;
@@ -846,31 +1042,48 @@ void toxav_handle_packet(RTPSession *_session, RTPMessage *_msg)
     if (_session->payload_type == type_audio % 128) {
         queue(call->j_buf, _msg);
 
-        int success = 0, dec_size;
-
-        ToxAvCSettings csettings;
-        toxav_get_peer_csettings(av, call_index, 0, &csettings);
-
-        int frame_size = 10000; /* FIXME: not static?  */
-        int16_t dest[frame_size];
+        int success = 0;
 
         while ((_msg = dequeue(call->j_buf, &success)) || success == 2) {
+            DECODE_PACKET *p;
+
             if (success == 2) {
-                dec_size = opus_decode(call->cs->audio_decoder, NULL, 0, dest, frame_size, 1);
+                p = malloc(sizeof(DECODE_PACKET));
+
+                if (p) {
+                    p->call_index = call_index;
+                    p->size = 0;
+                }
             } else {
-                dec_size = opus_decode(call->cs->audio_decoder, _msg->data, _msg->length, dest, frame_size, 0);
+                p = malloc(sizeof(DECODE_PACKET) + _msg->length);
+
+                if (p) {
+                    p->call_index = call_index;
+                    p->size = _msg->length;
+                    memcpy(p->data, _msg->data, _msg->length);
+                }
+
                 rtp_free_msg(NULL, _msg);
             }
 
-            if (dec_size < 0) {
-                LOGGER_WARNING("Decoding error: %s", opus_strerror(dec_size));
-                continue;
-            }
+            if (p) {
+                /* do the decoding on another thread */
+                pthread_mutex_lock(&av->decode_cond_mutex);
+                uint8_t w = av->audio_decode_write;
+
+                if (av->audio_decode_queue[w] == NULL) {
+                    av->audio_decode_queue[w] = p;
+                    av->audio_decode_write = (w + 1) % AUDIO_DECODE_QUEUE_SIZE;
+                    pthread_cond_signal(&av->decode_cond);
+                } else {
+                    printf("dropped audio frame\n");
+                    free(p);
+                }
 
-            if ( av->audio_callback )
-                av->audio_callback(av, call_index, dest, dec_size);
-            else
-                LOGGER_WARNING("Audio packet dropped due to missing callback!");
+                pthread_mutex_unlock(&av->decode_cond_mutex);
+            } else {
+                //malloc failed
+            }
         }
 
     } else {
@@ -887,14 +1100,34 @@ void toxav_handle_packet(RTPSession *_session, RTPMessage *_msg)
             /* piece of current frame */
         } else if (i > 0 && i < 128) {
             /* recieved a piece of a frame ahead, flush current frame and start reading this new frame */
-            int rc = vpx_codec_decode(&call->cs->v_decoder, call->frame_buf, call->frame_limit, NULL, MAX_DECODE_TIME_US);
+            DECODE_PACKET *p = malloc(sizeof(DECODE_PACKET) + call->frame_limit);
+
+            if (p) {
+                p->call_index = call_index;
+                p->size = call->frame_limit;
+                memcpy(p->data, call->frame_buf, call->frame_limit);
+
+                /* do the decoding on another thread */
+                pthread_mutex_lock(&av->decode_cond_mutex);
+                uint8_t w = av->video_decode_write;
+
+                if (av->video_decode_queue[w] == NULL) {
+                    av->video_decode_queue[w] = p;
+                    av->video_decode_write = (w + 1) % VIDEO_DECODE_QUEUE_SIZE;
+                    pthread_cond_signal(&av->decode_cond);
+                } else {
+                    printf("dropped video frame\n");
+                    free(p);
+                }
+
+                pthread_mutex_unlock(&av->decode_cond_mutex);
+            } else {
+                //malloc failed
+            }
+
             call->frame_id = packet[0];
             memset(call->frame_buf, 0, call->frame_limit);
             call->frame_limit = 0;
-
-            if (rc != VPX_CODEC_OK) {
-                LOGGER_ERROR("Error decoding video: %u %s\n", i, vpx_codec_err_to_string(rc));
-            }
         } else {
             /* old packet, dont read */
             LOGGER_DEBUG("Old packet: %u\n", i);
@@ -919,15 +1152,6 @@ void toxav_handle_packet(RTPSession *_session, RTPMessage *_msg)
 
 end:
         ;
-        vpx_codec_iter_t iter = NULL;
-        vpx_image_t *img;
-        img = vpx_codec_get_frame(&call->cs->v_decoder, &iter);
-
-        if (img && av->video_callback) {
-            av->video_callback(av, call_index, img);
-        } else
-            LOGGER_WARNING("Video packet dropped due to missing callback or no image!");
-
         rtp_free_msg(NULL, _msg);
     }
 }