[Spice-devel] [spice v12 01/26] server: Enable adding alternative MJPEG video encoders
Francois Gouget
fgouget at codeweavers.com
Tue Apr 5 15:15:03 UTC 2016
This replaces the original mjpeg_encoder API with a VideoEncoder base
class which can be reimplemented by other encoders.
This also renames the members and enums from mjpeg_* to video_*.
Signed-off-by: Francois Gouget <fgouget at codeweavers.com>
---
server/Makefile.am | 2 +-
server/dcc-send.c | 25 ++++----
server/dcc.c | 24 ++++----
server/dcc.h | 2 +-
server/mjpeg-encoder.c | 85 +++++++++++++++-----------
server/mjpeg-encoder.h | 102 -------------------------------
server/stream.c | 42 ++++++-------
server/stream.h | 4 +-
server/video-encoder.h | 160 +++++++++++++++++++++++++++++++++++++++++++++++++
9 files changed, 261 insertions(+), 185 deletions(-)
delete mode 100644 server/mjpeg-encoder.h
create mode 100644 server/video-encoder.h
diff --git a/server/Makefile.am b/server/Makefile.am
index a7a8d9f..8763f54 100644
--- a/server/Makefile.am
+++ b/server/Makefile.am
@@ -87,7 +87,6 @@ libserver_la_SOURCES = \
main-channel.c \
main-channel.h \
mjpeg-encoder.c \
- mjpeg-encoder.h \
red-channel.c \
red-channel.h \
red-common.h \
@@ -123,6 +122,7 @@ libserver_la_SOURCES = \
sound.h \
stat.h \
spicevmc.c \
+ video-encoder.h \
zlib-encoder.c \
zlib-encoder.h \
image-cache.h \
diff --git a/server/dcc-send.c b/server/dcc-send.c
index eb866cf..2fd4129 100644
--- a/server/dcc-send.c
+++ b/server/dcc-send.c
@@ -1691,7 +1691,7 @@ static int red_marshall_stream_data(RedChannelClient *rcc,
uint64_t time_now = spice_get_monotonic_time_ns();
size_t outbuf_size;
- if (!dcc->use_mjpeg_encoder_rate_control) {
+ if (!dcc->use_video_encoder_rate_control) {
if (time_now - agent->last_send_time < (1000 * 1000 * 1000) / agent->fps) {
agent->frames--;
#ifdef STREAM_STATS
@@ -1706,25 +1706,26 @@ static int red_marshall_stream_data(RedChannelClient *rcc,
drawable->red_drawable->mm_time :
reds_get_mm_time();
outbuf_size = dcc->send_data.stream_outbuf_size;
- ret = mjpeg_encoder_encode_frame(agent->mjpeg_encoder,
- &image->u.bitmap, width, height,
- &drawable->red_drawable->u.copy.src_area,
- stream->top_down, frame_mm_time,
- &dcc->send_data.stream_outbuf,
- &outbuf_size, &n);
+ ret = agent->video_encoder->encode_frame(agent->video_encoder,
+ frame_mm_time,
+ &image->u.bitmap, width, height,
+ &drawable->red_drawable->u.copy.src_area,
+ stream->top_down,
+ &dcc->send_data.stream_outbuf,
+ &outbuf_size, &n);
switch (ret) {
- case MJPEG_ENCODER_FRAME_DROP:
- spice_assert(dcc->use_mjpeg_encoder_rate_control);
+ case VIDEO_ENCODER_FRAME_DROP:
+ spice_assert(dcc->use_video_encoder_rate_control);
#ifdef STREAM_STATS
agent->stats.num_drops_fps++;
#endif
return TRUE;
- case MJPEG_ENCODER_FRAME_UNSUPPORTED:
+ case VIDEO_ENCODER_FRAME_UNSUPPORTED:
return FALSE;
- case MJPEG_ENCODER_FRAME_ENCODE_DONE:
+ case VIDEO_ENCODER_FRAME_ENCODE_DONE:
break;
default:
- spice_error("bad return value (%d) from mjpeg_encoder_encode_frame", ret);
+ spice_error("bad return value (%d) from VideoEncoder::encode_frame", ret);
return FALSE;
}
dcc->send_data.stream_outbuf_size = outbuf_size;
diff --git a/server/dcc.c b/server/dcc.c
index c952042..99b2540 100644
--- a/server/dcc.c
+++ b/server/dcc.c
@@ -346,7 +346,7 @@ static void dcc_init_stream_agents(DisplayChannelClient *dcc)
pipe_item_init(&agent->create_item, PIPE_ITEM_TYPE_STREAM_CREATE);
pipe_item_init(&agent->destroy_item, PIPE_ITEM_TYPE_STREAM_DESTROY);
}
- dcc->use_mjpeg_encoder_rate_control =
+ dcc->use_video_encoder_rate_control =
red_channel_client_test_remote_cap(RED_CHANNEL_CLIENT(dcc), SPICE_DISPLAY_CAP_STREAM_REPORT);
}
@@ -477,9 +477,9 @@ static void dcc_destroy_stream_agents(DisplayChannelClient *dcc)
StreamAgent *agent = &dcc->stream_agents[i];
region_destroy(&agent->vis_region);
region_destroy(&agent->clip);
- if (agent->mjpeg_encoder) {
- mjpeg_encoder_destroy(agent->mjpeg_encoder);
- agent->mjpeg_encoder = NULL;
+ if (agent->video_encoder) {
+ agent->video_encoder->destroy(agent->video_encoder);
+ agent->video_encoder = NULL;
}
}
}
@@ -1384,19 +1384,19 @@ static int dcc_handle_stream_report(DisplayChannelClient *dcc,
}
agent = &dcc->stream_agents[report->stream_id];
- if (!agent->mjpeg_encoder) {
+ if (!agent->video_encoder) {
return TRUE;
}
spice_return_val_if_fail(report->unique_id == agent->report_id, TRUE);
- mjpeg_encoder_client_stream_report(agent->mjpeg_encoder,
- report->num_frames,
- report->num_drops,
- report->start_frame_mm_time,
- report->end_frame_mm_time,
- report->last_frame_delay,
- report->audio_delay);
+ agent->video_encoder->client_stream_report(agent->video_encoder,
+ report->num_frames,
+ report->num_drops,
+ report->start_frame_mm_time,
+ report->end_frame_mm_time,
+ report->last_frame_delay,
+ report->audio_delay);
return TRUE;
}
diff --git a/server/dcc.h b/server/dcc.h
index 071a9fc..436d0be 100644
--- a/server/dcc.h
+++ b/server/dcc.h
@@ -109,7 +109,7 @@ struct DisplayChannelClient {
QRegion surface_client_lossy_region[NUM_SURFACES];
StreamAgent stream_agents[NUM_STREAMS];
- int use_mjpeg_encoder_rate_control;
+ int use_video_encoder_rate_control;
uint32_t streams_max_latency;
uint64_t streams_max_bit_rate;
bool gl_draw_ongoing;
diff --git a/server/mjpeg-encoder.c b/server/mjpeg-encoder.c
index c80febd..5ec0753 100644
--- a/server/mjpeg-encoder.c
+++ b/server/mjpeg-encoder.c
@@ -20,7 +20,7 @@
#endif
#include "red-common.h"
-#include "mjpeg-encoder.h"
+#include "video-encoder.h"
#include "utils.h"
#include <jerror.h>
#include <jpeglib.h>
@@ -154,7 +154,8 @@ typedef struct MJpegEncoderRateControl {
uint64_t warmup_start_time;
} MJpegEncoderRateControl;
-struct MJpegEncoder {
+typedef struct MJpegEncoder {
+ VideoEncoder base;
uint8_t *row;
uint32_t row_size;
int first_frame;
@@ -166,13 +167,13 @@ struct MJpegEncoder {
void (*pixel_converter)(void *src, uint8_t *dest);
MJpegEncoderRateControl rate_control;
- MJpegEncoderRateControlCbs cbs;
+ VideoEncoderRateControlCbs cbs;
/* stats */
uint64_t starting_bit_rate;
uint64_t avg_quality;
uint32_t num_frames;
-};
+} MJpegEncoder;
static void mjpeg_encoder_process_server_drops(MJpegEncoder *encoder);
static uint32_t get_min_required_playback_delay(uint64_t frame_enc_size,
@@ -184,8 +185,9 @@ static inline int rate_control_is_active(MJpegEncoder* encoder)
return encoder->cbs.get_roundtrip_ms != NULL;
}
-void mjpeg_encoder_destroy(MJpegEncoder *encoder)
+static void mjpeg_encoder_destroy(VideoEncoder *video_encoder)
{
+ MJpegEncoder *encoder = (MJpegEncoder*)video_encoder;
free(encoder->cinfo.dest);
jpeg_destroy_compress(&encoder->cinfo);
free(encoder->row);
@@ -724,7 +726,7 @@ static int mjpeg_encoder_start_frame(MJpegEncoder *encoder,
interval = (now - rate_control->bit_rate_info.last_frame_time);
if (interval < NSEC_PER_SEC / rate_control->adjusted_fps) {
- return MJPEG_ENCODER_FRAME_DROP;
+ return VIDEO_ENCODER_FRAME_DROP;
}
mjpeg_encoder_adjust_params_to_bit_rate(encoder);
@@ -772,14 +774,14 @@ static int mjpeg_encoder_start_frame(MJpegEncoder *encoder,
break;
default:
spice_debug("unsupported format %d", format);
- return MJPEG_ENCODER_FRAME_UNSUPPORTED;
+ return VIDEO_ENCODER_FRAME_UNSUPPORTED;
}
if (encoder->pixel_converter != NULL) {
unsigned int stride = width * 3;
/* check for integer overflow */
if (stride < width) {
- return MJPEG_ENCODER_FRAME_UNSUPPORTED;
+ return VIDEO_ENCODER_FRAME_UNSUPPORTED;
}
if (encoder->row_size < stride) {
encoder->row = spice_realloc(encoder->row, stride);
@@ -799,7 +801,7 @@ static int mjpeg_encoder_start_frame(MJpegEncoder *encoder,
encoder->num_frames++;
encoder->avg_quality += quality;
- return MJPEG_ENCODER_FRAME_ENCODE_DONE;
+ return VIDEO_ENCODER_FRAME_ENCODE_DONE;
}
static int mjpeg_encoder_encode_scanline(MJpegEncoder *encoder,
@@ -923,27 +925,31 @@ static int encode_frame(MJpegEncoder *encoder, const SpiceRect *src,
return TRUE;
}
-int mjpeg_encoder_encode_frame(MJpegEncoder *encoder,
- const SpiceBitmap *bitmap, int width, int height,
- const SpiceRect *src,
- int top_down, uint32_t frame_mm_time,
- uint8_t **outbuf, size_t *outbuf_size,
- int *data_size)
+static int mjpeg_encoder_encode_frame(VideoEncoder *video_encoder,
+ uint32_t frame_mm_time,
+ const SpiceBitmap *bitmap,
+ int width, int height,
+ const SpiceRect *src, int top_down,
+ uint8_t **outbuf, size_t *outbuf_size,
+ int *data_size)
{
+ MJpegEncoder *encoder = (MJpegEncoder*)video_encoder;
+
int ret = mjpeg_encoder_start_frame(encoder, bitmap->format,
- width, height, outbuf, outbuf_size,
- frame_mm_time);
- if (ret != MJPEG_ENCODER_FRAME_ENCODE_DONE) {
+ width, height,
+ outbuf, outbuf_size,
+ frame_mm_time);
+ if (ret != VIDEO_ENCODER_FRAME_ENCODE_DONE) {
return ret;
}
if (!encode_frame(encoder, src, bitmap, top_down)) {
- return MJPEG_ENCODER_FRAME_UNSUPPORTED;
+ return VIDEO_ENCODER_FRAME_UNSUPPORTED;
}
*data_size = mjpeg_encoder_end_frame(encoder);
- return MJPEG_ENCODER_FRAME_ENCODE_DONE;
+ return VIDEO_ENCODER_FRAME_ENCODE_DONE;
}
@@ -1174,14 +1180,15 @@ static uint32_t get_min_required_playback_delay(uint64_t frame_enc_size,
#define MJPEG_VIDEO_VS_AUDIO_LATENCY_FACTOR 1.25
#define MJPEG_VIDEO_DELAY_TH -15
-void mjpeg_encoder_client_stream_report(MJpegEncoder *encoder,
- uint32_t num_frames,
- uint32_t num_drops,
- uint32_t start_frame_mm_time,
- uint32_t end_frame_mm_time,
- int32_t end_frame_delay,
- uint32_t audio_delay)
+static void mjpeg_encoder_client_stream_report(VideoEncoder *video_encoder,
+ uint32_t num_frames,
+ uint32_t num_drops,
+ uint32_t start_frame_mm_time,
+ uint32_t end_frame_mm_time,
+ int32_t end_frame_delay,
+ uint32_t audio_delay)
{
+ MJpegEncoder *encoder = (MJpegEncoder*)video_encoder;
MJpegEncoderRateControl *rate_control = &encoder->rate_control;
MJpegEncoderClientState *client_state = &rate_control->client_state;
uint64_t avg_enc_size = 0;
@@ -1282,8 +1289,9 @@ void mjpeg_encoder_client_stream_report(MJpegEncoder *encoder,
}
}
-void mjpeg_encoder_notify_server_frame_drop(MJpegEncoder *encoder)
+static void mjpeg_encoder_notify_server_frame_drop(VideoEncoder *video_encoder)
{
+ MJpegEncoder *encoder = (MJpegEncoder*)video_encoder;
encoder->rate_control.server_state.num_frames_dropped++;
mjpeg_encoder_process_server_drops(encoder);
}
@@ -1320,24 +1328,33 @@ static void mjpeg_encoder_process_server_drops(MJpegEncoder *encoder)
server_state->num_frames_dropped = 0;
}
-uint64_t mjpeg_encoder_get_bit_rate(MJpegEncoder *encoder)
+static uint64_t mjpeg_encoder_get_bit_rate(VideoEncoder *video_encoder)
{
+ MJpegEncoder *encoder = (MJpegEncoder*)video_encoder;
return encoder->rate_control.byte_rate * 8;
}
-void mjpeg_encoder_get_stats(MJpegEncoder *encoder, MJpegEncoderStats *stats)
+static void mjpeg_encoder_get_stats(VideoEncoder *video_encoder,
+ VideoEncoderStats *stats)
{
+ MJpegEncoder *encoder = (MJpegEncoder*)video_encoder;
spice_assert(encoder != NULL && stats != NULL);
stats->starting_bit_rate = encoder->starting_bit_rate;
- stats->cur_bit_rate = mjpeg_encoder_get_bit_rate(encoder);
+ stats->cur_bit_rate = mjpeg_encoder_get_bit_rate(video_encoder);
stats->avg_quality = (double)encoder->avg_quality / encoder->num_frames;
}
-MJpegEncoder *mjpeg_encoder_new(uint64_t starting_bit_rate,
- MJpegEncoderRateControlCbs *cbs)
+VideoEncoder *mjpeg_encoder_new(uint64_t starting_bit_rate,
+ VideoEncoderRateControlCbs *cbs)
{
MJpegEncoder *encoder = spice_new0(MJpegEncoder, 1);
+ encoder->base.destroy = mjpeg_encoder_destroy;
+ encoder->base.encode_frame = mjpeg_encoder_encode_frame;
+ encoder->base.client_stream_report = mjpeg_encoder_client_stream_report;
+ encoder->base.notify_server_frame_drop = mjpeg_encoder_notify_server_frame_drop;
+ encoder->base.get_bit_rate = mjpeg_encoder_get_bit_rate;
+ encoder->base.get_stats = mjpeg_encoder_get_stats;
encoder->first_frame = TRUE;
encoder->rate_control.byte_rate = starting_bit_rate / 8;
encoder->starting_bit_rate = starting_bit_rate;
@@ -1357,5 +1374,5 @@ MJpegEncoder *mjpeg_encoder_new(uint64_t starting_bit_rate,
encoder->cinfo.err = jpeg_std_error(&encoder->jerr);
jpeg_create_compress(&encoder->cinfo);
- return encoder;
+ return (VideoEncoder*)encoder;
}
diff --git a/server/mjpeg-encoder.h b/server/mjpeg-encoder.h
deleted file mode 100644
index 4d871ff..0000000
--- a/server/mjpeg-encoder.h
+++ /dev/null
@@ -1,102 +0,0 @@
-/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
-/*
- Copyright (C) 2009 Red Hat, Inc.
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, see <http://www.gnu.org/licenses/>.
-*/
-
-#ifndef _H_MJPEG_ENCODER
-#define _H_MJPEG_ENCODER
-
-#include "red-common.h"
-
-enum {
- MJPEG_ENCODER_FRAME_UNSUPPORTED = -1,
- MJPEG_ENCODER_FRAME_DROP,
- MJPEG_ENCODER_FRAME_ENCODE_DONE,
-};
-
-typedef struct MJpegEncoder MJpegEncoder;
-
-/*
- * Callbacks required for controling and adjusting
- * the stream bit rate:
- * @opaque: a pointer to be passed to the rate control callbacks.
- * get_roundtrip_ms: roundtrip time in milliseconds
- * get_source_fps: the input frame rate (#frames per second), i.e.,
- * the rate of frames arriving from the guest to spice-server,
- * before any drops.
- */
-typedef struct MJpegEncoderRateControlCbs {
- void *opaque;
- uint32_t (*get_roundtrip_ms)(void *opaque);
- uint32_t (*get_source_fps)(void *opaque);
- void (*update_client_playback_delay)(void *opaque, uint32_t delay_ms);
-} MJpegEncoderRateControlCbs;
-
-typedef struct MJpegEncoderStats {
- uint64_t starting_bit_rate;
- uint64_t cur_bit_rate;
- double avg_quality;
-} MJpegEncoderStats;
-
-MJpegEncoder *mjpeg_encoder_new(uint64_t starting_bit_rate,
- MJpegEncoderRateControlCbs *cbs);
-void mjpeg_encoder_destroy(MJpegEncoder *encoder);
-
-int mjpeg_encoder_encode_frame(MJpegEncoder *encoder,
- const SpiceBitmap *bitmap, int width, int height,
- const SpiceRect *src,
- int top_down, uint32_t frame_mm_time,
- uint8_t **outbuf, size_t *outbuf_size,
- int *data_size);
-
-/*
- * bit rate control
- */
-
-/*
- * Data that should be periodically obtained from the client. The report contains:
- * num_frames : the number of frames that reached the client during the time
- * the report is referring to.
- * num_drops : the part of the above frames that was dropped by the client due to
- * late arrival time.
- * start_frame_mm_time: the mm_time of the first frame included in the report
- * end_frame_mm_time : the mm_time of the last_frame included in the report
- * end_frame_delay : (end_frame_mm_time - client_mm_time)
- * audio delay : the latency of the audio playback.
- * If there is no audio playback, set it to MAX_UINT.
- *
- */
-void mjpeg_encoder_client_stream_report(MJpegEncoder *encoder,
- uint32_t num_frames,
- uint32_t num_drops,
- uint32_t start_frame_mm_time,
- uint32_t end_frame_mm_time,
- int32_t end_frame_delay,
- uint32_t audio_delay);
-
-/*
- * Notify the encoder each time a frame is dropped due to pipe
- * congestion.
- * We can deduce the client state by the frame dropping rate in the server.
- * Monitoring the frame drops can help in fine tuning the playback parameters
- * when the client reports are delayed.
- */
-void mjpeg_encoder_notify_server_frame_drop(MJpegEncoder *encoder);
-
-uint64_t mjpeg_encoder_get_bit_rate(MJpegEncoder *encoder);
-void mjpeg_encoder_get_stats(MJpegEncoder *encoder, MJpegEncoderStats *stats);
-
-#endif
diff --git a/server/stream.c b/server/stream.c
index 548c4c7..89fb13e 100644
--- a/server/stream.c
+++ b/server/stream.c
@@ -32,10 +32,10 @@ void stream_agent_stats_print(StreamAgent *agent)
#ifdef STREAM_STATS
StreamStats *stats = &agent->stats;
double passed_mm_time = (stats->end - stats->start) / 1000.0;
- MJpegEncoderStats encoder_stats = {0};
+ VideoEncoderStats encoder_stats = {0};
- if (agent->mjpeg_encoder) {
- mjpeg_encoder_get_stats(agent->mjpeg_encoder, &encoder_stats);
+ if (agent->video_encoder) {
+ agent->video_encoder->get_stats(agent->video_encoder, &encoder_stats);
}
spice_debug("stream=%p dim=(%dx%d) #in-frames=%"PRIu64" #in-avg-fps=%.2f #out-frames=%"PRIu64" "
@@ -79,8 +79,8 @@ void stream_stop(DisplayChannel *display, Stream *stream)
region_clear(&stream_agent->vis_region);
region_clear(&stream_agent->clip);
spice_assert(!pipe_item_is_linked(&stream_agent->destroy_item));
- if (stream_agent->mjpeg_encoder && dcc->use_mjpeg_encoder_rate_control) {
- uint64_t stream_bit_rate = mjpeg_encoder_get_bit_rate(stream_agent->mjpeg_encoder);
+ if (stream_agent->video_encoder && dcc->use_video_encoder_rate_control) {
+ uint64_t stream_bit_rate = stream_agent->video_encoder->get_bit_rate(stream_agent->video_encoder);
if (stream_bit_rate > dcc->streams_max_bit_rate) {
spice_debug("old max-bit-rate=%.2f new=%.2f",
@@ -338,7 +338,7 @@ static void before_reattach_stream(DisplayChannel *display,
dcc = dpi->dcc;
agent = &dcc->stream_agents[index];
- if (!dcc->use_mjpeg_encoder_rate_control &&
+ if (!dcc->use_video_encoder_rate_control &&
!dcc->common.is_low_bandwidth) {
continue;
}
@@ -347,8 +347,8 @@ static void before_reattach_stream(DisplayChannel *display,
#ifdef STREAM_STATS
agent->stats.num_drops_pipe++;
#endif
- if (dcc->use_mjpeg_encoder_rate_control) {
- mjpeg_encoder_notify_server_frame_drop(agent->mjpeg_encoder);
+ if (dcc->use_video_encoder_rate_control) {
+ agent->video_encoder->notify_server_frame_drop(agent->video_encoder);
} else {
++agent->drops;
}
@@ -361,7 +361,7 @@ static void before_reattach_stream(DisplayChannel *display,
agent = &dcc->stream_agents[index];
- if (dcc->use_mjpeg_encoder_rate_control) {
+ if (dcc->use_video_encoder_rate_control) {
continue;
}
if (agent->frames / agent->fps < FPS_TEST_INTERVAL) {
@@ -594,7 +594,7 @@ static void dcc_update_streams_max_latency(DisplayChannelClient *dcc, StreamAgen
}
for (i = 0; i < NUM_STREAMS; i++) {
StreamAgent *other_agent = &dcc->stream_agents[i];
- if (other_agent == remove_agent || !other_agent->mjpeg_encoder) {
+ if (other_agent == remove_agent || !other_agent->video_encoder) {
continue;
}
if (other_agent->client_required_latency > new_max_latency) {
@@ -714,19 +714,19 @@ void dcc_create_stream(DisplayChannelClient *dcc, Stream *stream)
agent->fps = MAX_FPS;
agent->dcc = dcc;
- if (dcc->use_mjpeg_encoder_rate_control) {
- MJpegEncoderRateControlCbs mjpeg_cbs;
+ if (dcc->use_video_encoder_rate_control) {
+ VideoEncoderRateControlCbs video_cbs;
uint64_t initial_bit_rate;
- mjpeg_cbs.opaque = agent;
- mjpeg_cbs.get_roundtrip_ms = get_roundtrip_ms;
- mjpeg_cbs.get_source_fps = get_source_fps;
- mjpeg_cbs.update_client_playback_delay = update_client_playback_delay;
+ video_cbs.opaque = agent;
+ video_cbs.get_roundtrip_ms = get_roundtrip_ms;
+ video_cbs.get_source_fps = get_source_fps;
+ video_cbs.update_client_playback_delay = update_client_playback_delay;
initial_bit_rate = get_initial_bit_rate(dcc, stream);
- agent->mjpeg_encoder = mjpeg_encoder_new(initial_bit_rate, &mjpeg_cbs);
+ agent->video_encoder = mjpeg_encoder_new(initial_bit_rate, &video_cbs);
} else {
- agent->mjpeg_encoder = mjpeg_encoder_new(0, NULL);
+ agent->video_encoder = mjpeg_encoder_new(0, NULL);
}
red_channel_client_pipe_add(RED_CHANNEL_CLIENT(dcc), &agent->create_item);
@@ -752,9 +752,9 @@ void stream_agent_stop(StreamAgent *agent)
DisplayChannelClient *dcc = agent->dcc;
dcc_update_streams_max_latency(dcc, agent);
- if (agent->mjpeg_encoder) {
- mjpeg_encoder_destroy(agent->mjpeg_encoder);
- agent->mjpeg_encoder = NULL;
+ if (agent->video_encoder) {
+ agent->video_encoder->destroy(agent->video_encoder);
+ agent->video_encoder = NULL;
}
}
diff --git a/server/stream.h b/server/stream.h
index a3e84ed..59df9bd 100644
--- a/server/stream.h
+++ b/server/stream.h
@@ -20,7 +20,7 @@
#include <glib.h>
#include "utils.h"
-#include "mjpeg-encoder.h"
+#include "video-encoder.h"
#include "common/region.h"
#include "red-channel.h"
#include "image-cache.h"
@@ -85,7 +85,7 @@ typedef struct StreamAgent {
PipeItem destroy_item;
Stream *stream;
uint64_t last_send_time;
- MJpegEncoder *mjpeg_encoder;
+ VideoEncoder *video_encoder;
DisplayChannelClient *dcc;
int frames;
diff --git a/server/video-encoder.h b/server/video-encoder.h
new file mode 100644
index 0000000..2a857ba
--- /dev/null
+++ b/server/video-encoder.h
@@ -0,0 +1,160 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/*
+ Copyright (C) 2009 Red Hat, Inc.
+ Copyright (C) 2015 Jeremy White
+ Copyright (C) 2015 Francois Gouget
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _H_VIDEO_ENCODER
+#define _H_VIDEO_ENCODER
+
+enum {
+ VIDEO_ENCODER_FRAME_UNSUPPORTED = -1,
+ VIDEO_ENCODER_FRAME_DROP,
+ VIDEO_ENCODER_FRAME_ENCODE_DONE,
+};
+
+typedef struct VideoEncoderStats {
+ uint64_t starting_bit_rate;
+ uint64_t cur_bit_rate;
+ double avg_quality;
+} VideoEncoderStats;
+
+typedef struct VideoEncoder VideoEncoder;
+struct VideoEncoder {
+ /* Releases the video encoder's resources */
+ void (*destroy)(VideoEncoder *encoder);
+
+ /* Compresses the specified src image area into the outbuf buffer.
+ *
+ * @encoder: The video encoder.
+ * @frame_mm_time: The frame's mm-time timestamp in milliseconds.
+ * @bitmap: The Spice screen.
+ * @src: A rectangle specifying the area occupied by the video.
+ * @top_down: If true the first video line is specified by src.top.
+ * @outbuf: The buffer for the compressed frame. This must either
+ * be NULL or point to a buffer allocated by malloc
+ * since it may be reallocated, if its size is too small.
+ * @outbuf_size: The size of the outbuf buffer.
+ * @data_size: The size of the compressed frame.
+ * @return:
+ * VIDEO_ENCODER_FRAME_ENCODE_DONE if successful.
+ * VIDEO_ENCODER_FRAME_UNSUPPORTED if the frame cannot be encoded.
+ * VIDEO_ENCODER_FRAME_DROP if the frame was dropped. This value can
+ * only happen if rate control is active.
+ */
+ int (*encode_frame)(VideoEncoder *encoder, uint32_t frame_mm_time,
+ const SpiceBitmap *bitmap, int width, int height,
+ const SpiceRect *src, int top_down,
+ uint8_t **outbuf, size_t *outbuf_size, int *data_size);
+
+ /*
+ * Bit rate control methods.
+ */
+
+ /* When rate control is active statistics are periodically obtained from
+ * the client and sent to the video encoder through this method.
+ *
+ * @encoder: The video encoder.
+ * @num_frames: The number of frames that reached the client during
+ * the time period the report is referring to.
+ * @num_drops: The part of the above frames that was dropped by the
+ * client due to late arrival time.
+ * @start_frame_mm_time: The mm_time of the first frame included in the
+ * report.
+ * @end_frame_mm_time: The mm_time of the last frame included in the
+ * report.
+ * @end_frame_delay: This indicates how long in advance the client
+ * received the last frame before having to display it.
+ * @audio delay: The latency of the audio playback or MAX_UINT if it
+ * is not tracked.
+ */
+ void (*client_stream_report)(VideoEncoder *encoder,
+ uint32_t num_frames, uint32_t num_drops,
+ uint32_t start_frame_mm_time,
+ uint32_t end_frame_mm_time,
+ int32_t end_frame_delay, uint32_t audio_delay);
+
+ /* This notifies the video encoder each time a frame is dropped due to
+ * pipe congestion.
+ *
+ * Note that frames are being dropped before they are encoded and that
+ * there may be any number of encoded frames in the network queue.
+ * The client reports provide richer and typically more reactive
+ * information for fine tuning the playback parameters but this function
+ * provides a fallback when client reports are getting delayed or are not
+ * supported by the client.
+ *
+ * @encoder: The video encoder.
+ */
+ void (*notify_server_frame_drop)(VideoEncoder *encoder);
+
+ /* This queries the video encoder's current bit rate.
+ *
+ * @encoder: The video encoder.
+ * @return: The current bit rate in bits per second.
+ */
+ uint64_t (*get_bit_rate)(VideoEncoder *encoder);
+
+ /* Collects video statistics.
+ *
+ * @encoder: The video encoder.
+ * @stats: A VideoEncoderStats structure to fill with the collected
+ * statistics.
+ */
+ void (*get_stats)(VideoEncoder *encoder, VideoEncoderStats *stats);
+};
+
+
+/* When rate control is active the video encoder can use these callbacks to
+ * figure out how to adjust the stream bit rate and adjust some stream
+ * parameters.
+ */
+typedef struct VideoEncoderRateControlCbs {
+ /* The opaque parameter for the callbacks */
+ void *opaque;
+
+ /* Returns the stream's estimated roundtrip time in milliseconds. */
+ uint32_t (*get_roundtrip_ms)(void *opaque);
+
+ /* Returns the estimated input frame rate.
+ *
+ * This is the number of frames per second arriving from the guest to
+ * spice-server, before any drops.
+ */
+ uint32_t (*get_source_fps)(void *opaque);
+
+ /* Informs the client of the minimum playback delay.
+ *
+ * @delay_ms: The minimum number of milliseconds required for the
+ * frames to reach the client.
+ */
+ void (*update_client_playback_delay)(void *opaque, uint32_t delay_ms);
+} VideoEncoderRateControlCbs;
+
+
+/* Instantiates the video encoder.
+ *
+ * @starting_bit_rate: An initial estimate of the available stream bit rate
+ * or zero if the client does not support rate control.
+ * @cbs: A set of callback methods to be used for rate control.
+ * @return: A pointer to a structure implementing the VideoEncoder
+ * methods.
+ */
+VideoEncoder* mjpeg_encoder_new(uint64_t starting_bit_rate,
+ VideoEncoderRateControlCbs *cbs);
+
+#endif
--
2.8.0.rc3
More information about the Spice-devel
mailing list