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avvidenc: Add thread-count parameter for libav encoders

Browse source 
As some libav encoders (such as MPEG2) use a thread_count parameter to control
how many threads to use, and since it was always being set to 0 (which uses
the default), suboptimal threading can sometimes be chosen.  This extends the
libav encoders to allow for a max-threads parameter which is passed into
the internal structure to control this knob if applicable to the encoder.

https://bugzilla.gnome.org/show_bug.cgi?id=726612
This commit is contained in:
Gavin Hurlbut 2014-03-17 22:26:52 -07:00 committed by Tim-Philipp Müller
parent 7bb4f93de9
commit 38fc56e207
2 changed files with 28 additions and 2 deletions
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29
ext/libav/gstavvidenc.c
View file

@ -62,6 +62,7 @@ enum
PROP_ME_METHOD,
PROP_BUFSIZE,
PROP_RTP_PAYLOAD_SIZE,
PROP_MAX_THREADS,
PROP_COMPLIANCE,
PROP_CFG_BASE,
};
@ -174,6 +175,7 @@ gst_ffmpegvidenc_class_init (GstFFMpegVidEncClass * klass)
{
GObjectClass *gobject_class;
GstVideoEncoderClass *venc_class;
int caps;
gobject_class = (GObjectClass *) klass;
venc_class = (GstVideoEncoderClass *) klass;
@ -207,6 +209,14 @@ gst_ffmpegvidenc_class_init (GstFFMpegVidEncClass * klass)
"RTP Payload Size", "Target GOB length", 0, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
caps = klass->in_plugin->capabilities;
if (caps & (CODEC_CAP_FRAME_THREADS | CODEC_CAP_SLICE_THREADS)) {
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MAX_THREADS,
g_param_spec_int ("max-threads", "Maximum encode threads",
"Maximum number of worker threads to spawn. (0 = auto)",
0, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_COMPLIANCE,
g_param_spec_enum ("compliance", "Compliance",
"Adherence of the encoder to the specifications",
@ -247,6 +257,7 @@ gst_ffmpegvidenc_init (GstFFMpegVidEnc * ffmpegenc)
ffmpegenc->gop_size = DEFAULT_VIDEO_GOP_SIZE;
ffmpegenc->rtp_payload_size = 0;
ffmpegenc->compliance = FFMPEG_DEFAULT_COMPLIANCE;
ffmpegenc->max_threads = 0;
ffmpegenc->lmin = 2;
ffmpegenc->lmax = 31;
@ -320,6 +331,14 @@ gst_ffmpegvidenc_set_format (GstVideoEncoder * encoder,
GST_DEBUG_OBJECT (ffmpegenc, "Setting avcontext to bitrate %d, gop_size %d",
ffmpegenc->bitrate, ffmpegenc->gop_size);
if (ffmpegenc->max_threads == 0) {
if (!(oclass->in_plugin->capabilities & CODEC_CAP_AUTO_THREADS))
ffmpegenc->context->thread_count = gst_ffmpeg_auto_max_threads ();
else
ffmpegenc->context->thread_count = 0;
} else
ffmpegenc->context->thread_count = ffmpegenc->max_threads;
/* RTP payload used for GOB production (for Asterisk) */
if (ffmpegenc->rtp_payload_size) {
ffmpegenc->context->rtp_payload_size = ffmpegenc->rtp_payload_size;
@ -557,7 +576,7 @@ gst_ffmpegvidenc_propose_allocation (GstVideoEncoder * encoder,
static void
gst_ffmpegvidenc_free_avpacket (gpointer pkt)
{
av_packet_unref ((AVPacket *)pkt);
av_packet_unref ((AVPacket *) pkt);
g_slice_free (AVPacket, pkt);
}
@ -570,7 +589,7 @@ gst_ffmpegvidenc_handle_frame (GstVideoEncoder * encoder,
gint ret = 0, c;
GstVideoInfo *info = &ffmpegenc->input_state->info;
GstVideoFrame vframe;
AVPacket * pkt;
AVPacket *pkt;
int have_data = 0;
if (GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME (frame))
@ -757,6 +776,9 @@ gst_ffmpegvidenc_set_property (GObject * object,
case PROP_COMPLIANCE:
ffmpegenc->compliance = g_value_get_enum (value);
break;
case PROP_MAX_THREADS:
ffmpegenc->max_threads = g_value_get_int (value);
break;
default:
if (!gst_ffmpeg_cfg_set_property (object, value, pspec))
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@ -793,6 +815,9 @@ gst_ffmpegvidenc_get_property (GObject * object,
case PROP_COMPLIANCE:
g_value_set_enum (value, ffmpegenc->compliance);
break;
case PROP_MAX_THREADS:
g_value_set_int (value, ffmpegenc->max_threads);
break;
default:
if (!gst_ffmpeg_cfg_get_property (object, value, pspec))
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

1
ext/libav/gstavvidenc.h
View file

@ -50,6 +50,7 @@ struct _GstFFMpegVidEnc
gint buffer_size;
gint rtp_payload_size;
gint compliance;
gint max_threads;
guint8 *working_buf;
gsize working_buf_size;