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Reduce nesting by doing more early returns on error.

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This almost entirely avoids any else-after-return in toxcore. One case is
left, and that one is more readable this way.

Why no else after return: https://llvm.org/docs/CodingStandards.html#don-t-use-else-after-a-return
Why exemptions exist: https://blog.mozilla.org/nnethercote/2009/08/31/no-else-after-return-considered-harmful/
This commit is contained in:
iphydf 2018-07-19 21:47:51 +00:00
parent 253abe5de4
commit 9a96bb9a5b
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GPG Key ID: 3855DBA2D74403C9
2 changed files with 44 additions and 49 deletions
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81
toxav/video.c
View File

@ -299,55 +299,52 @@ void vc_iterate(VCSession *vc)
return;
}
struct RTPMessage *p;
vpx_codec_err_t rc;
pthread_mutex_lock(vc->queue_mutex);
uint32_t full_data_len;
struct RTPMessage *p;
if (rb_read((RingBuffer *)vc->vbuf_raw, (void **)&p)) {
pthread_mutex_unlock(vc->queue_mutex);
const struct RTPHeader *const header = &p->header;
if (header->flags & RTP_LARGE_FRAME) {
full_data_len = header->data_length_full;
LOGGER_DEBUG(vc->log, "vc_iterate:001:full_data_len=%d", (int)full_data_len);
} else {
full_data_len = p->len;
LOGGER_DEBUG(vc->log, "vc_iterate:002");
}
LOGGER_DEBUG(vc->log, "vc_iterate: rb_read p->len=%d p->header.xe=%d", (int)full_data_len, p->header.xe);
LOGGER_DEBUG(vc->log, "vc_iterate: rb_read rb size=%d", (int)rb_size((RingBuffer *)vc->vbuf_raw));
rc = vpx_codec_decode(vc->decoder, p->data, full_data_len, nullptr, MAX_DECODE_TIME_US);
free(p);
if (rc != VPX_CODEC_OK) {
LOGGER_ERROR(vc->log, "Error decoding video: %d %s", (int)rc, vpx_codec_err_to_string(rc));
} else {
/* Play decoded images */
vpx_codec_iter_t iter = nullptr;
vpx_image_t *dest = nullptr;
while ((dest = vpx_codec_get_frame(vc->decoder, &iter)) != nullptr) {
if (vc->vcb.first) {
vc->vcb.first(vc->av, vc->friend_number, dest->d_w, dest->d_h,
(const uint8_t *)dest->planes[0], (const uint8_t *)dest->planes[1], (const uint8_t *)dest->planes[2],
dest->stride[0], dest->stride[1], dest->stride[2], vc->vcb.second);
}
vpx_img_free(dest); // is this needed? none of the VPx examples show that
}
}
return;
} else {
if (!rb_read((RingBuffer *)vc->vbuf_raw, (void **)&p)) {
LOGGER_TRACE(vc->log, "no Video frame data available");
pthread_mutex_unlock(vc->queue_mutex);
return;
}
pthread_mutex_unlock(vc->queue_mutex);
const struct RTPHeader *const header = &p->header;
uint32_t full_data_len;
if (header->flags & RTP_LARGE_FRAME) {
full_data_len = header->data_length_full;
LOGGER_DEBUG(vc->log, "vc_iterate:001:full_data_len=%d", (int)full_data_len);
} else {
full_data_len = p->len;
LOGGER_DEBUG(vc->log, "vc_iterate:002");
}
LOGGER_DEBUG(vc->log, "vc_iterate: rb_read p->len=%d p->header.xe=%d", (int)full_data_len, p->header.xe);
LOGGER_DEBUG(vc->log, "vc_iterate: rb_read rb size=%d", (int)rb_size((RingBuffer *)vc->vbuf_raw));
const vpx_codec_err_t rc = vpx_codec_decode(vc->decoder, p->data, full_data_len, nullptr, MAX_DECODE_TIME_US);
free(p);
if (rc != VPX_CODEC_OK) {
LOGGER_ERROR(vc->log, "Error decoding video: %d %s", (int)rc, vpx_codec_err_to_string(rc));
return;
}
/* Play decoded images */
vpx_codec_iter_t iter = nullptr;
vpx_image_t *dest = nullptr;
while ((dest = vpx_codec_get_frame(vc->decoder, &iter)) != nullptr) {
if (vc->vcb.first) {
vc->vcb.first(vc->av, vc->friend_number, dest->d_w, dest->d_h,
(const uint8_t *)dest->planes[0], (const uint8_t *)dest->planes[1], (const uint8_t *)dest->planes[2],
dest->stride[0], dest->stride[1], dest->stride[2], vc->vcb.second);
}
vpx_img_free(dest); // is this needed? none of the VPx examples show that
}
}
int vc_queue_message(void *vcp, struct RTPMessage *msg)

12
toxcore/group.c
View File

@ -2270,12 +2270,9 @@ static unsigned int lossy_packet_not_received(Group_c *g, int peer_index, uint16
g->group[peer_index].top_lossy_number = message_number;
g->group[peer_index].bottom_lossy_number = (message_number - MAX_LOSSY_COUNT) + 1;
g->group[peer_index].recv_lossy[message_number % MAX_LOSSY_COUNT] = 1;
return 0;
} else { // top_distance < MAX_LOSSY_COUNT
unsigned int i;
for (i = g->group[peer_index].bottom_lossy_number; i != (g->group[peer_index].bottom_lossy_number + top_distance);
for (unsigned int i = g->group[peer_index].bottom_lossy_number;
i != g->group[peer_index].bottom_lossy_number + top_distance;
++i) {
g->group[peer_index].recv_lossy[i % MAX_LOSSY_COUNT] = 0;
}
@ -2283,9 +2280,10 @@ static unsigned int lossy_packet_not_received(Group_c *g, int peer_index, uint16
g->group[peer_index].top_lossy_number = message_number;
g->group[peer_index].bottom_lossy_number = (message_number - MAX_LOSSY_COUNT) + 1;
g->group[peer_index].recv_lossy[message_number % MAX_LOSSY_COUNT] = 1;
return 0;
}
return 0;
}
static int handle_lossy(void *object, int friendcon_id, const uint8_t *data, uint16_t length, void *userdata)