mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2025-03-27 03:23:16 +00:00
Code Issues 1 Projects Releases Wiki Activity

audioencoder: Add support for requesting a minimum and maximum number of samples per frame

Browse source 
This extends the special case of a fixed number of samples per frame
that was supported before already.
This commit is contained in:
Sebastian Dröge 2011-09-26 15:59:22 +02:00
parent 16c3d6b3d5
commit 4fa9749106
2 changed files with 71 additions and 24 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

87
gst-libs/gst/audio/gstaudioencoder.c
View file

@ -188,7 +188,7 @@ typedef struct _GstAudioEncoderContext
GstAudioInfo info;
/* output */
gint frame_samples;
gint frame_samples_min, frame_samples_max;
gint frame_max;
gint lookahead;
/* MT-protected (with LOCK) */
@ -701,9 +701,11 @@ gst_audio_encoder_push_buffers (GstAudioEncoder * enc, gboolean force)
g_assert (priv->offset <= av);
av -= priv->offset;
need = ctx->frame_samples > 0 ? ctx->frame_samples * ctx->info.bpf : av;
GST_LOG_OBJECT (enc, "available: %d, needed: %d, force: %d",
av, need, force);
need =
ctx->frame_samples_min >
0 ? ctx->frame_samples_min * ctx->info.bpf : av;
GST_LOG_OBJECT (enc, "available: %d, needed: %d, force: %d", av, need,
force);
if ((need > av) || !av) {
if (G_UNLIKELY (force)) {
@ -716,14 +718,19 @@ gst_audio_encoder_push_buffers (GstAudioEncoder * enc, gboolean force)
priv->force = FALSE;
}
/* if we have some extra metadata,
* provide for integer multiple of frames to allow for better granularity
* of processing */
if (ctx->frame_samples > 0 && need) {
if (ctx->frame_max > 1)
need = need * MIN ((av / need), ctx->frame_max);
else if (ctx->frame_max == 0)
need = need * (av / need);
if (ctx->frame_samples_max > 0)
need = MIN (av, ctx->frame_samples_max * ctx->info.bpf);
if (ctx->frame_samples_min == ctx->frame_samples_max) {
/* if we have some extra metadata,
* provide for integer multiple of frames to allow for better granularity
* of processing */
if (ctx->frame_samples_min > 0 && need) {
if (ctx->frame_max > 1)
need = need * MIN ((av / need), ctx->frame_max);
else if (ctx->frame_max == 0)
need = need * (av / need);
}
}
if (need) {
@ -1034,7 +1041,8 @@ gst_audio_encoder_sink_setcaps (GstPad * pad, GstCaps * caps)
gst_audio_encoder_drain (enc);
/* context defaults */
enc->priv->ctx.frame_samples = 0;
enc->priv->ctx.frame_samples_min = 0;
enc->priv->ctx.frame_samples_max = 0;
enc->priv->ctx.frame_max = 0;
enc->priv->ctx.lookahead = 0;
@ -1696,37 +1704,71 @@ gst_audio_encoder_get_audio_info (GstAudioEncoder * enc)
}
/**
* gst_audio_encoder_set_frame_samples:
* gst_audio_encoder_set_frame_samples_min:
* @enc: a #GstAudioEncoder
* @num: number of samples per frame
*
* Sets number of samples (per channel) subclass needs to be handed,
* or will be handed all available if 0.
* at least or will be handed all available if 0.
*
* Since: 0.10.36
*/
void
gst_audio_encoder_set_frame_samples (GstAudioEncoder * enc, gint num)
gst_audio_encoder_set_frame_samples_min (GstAudioEncoder * enc, gint num)
{
g_return_if_fail (GST_IS_AUDIO_ENCODER (enc));
enc->priv->ctx.frame_samples = num;
enc->priv->ctx.frame_samples_min = num;
}
/**
* gst_audio_encoder_get_frame_samples:
* gst_audio_encoder_get_frame_samples_min:
* @enc: a #GstAudioEncoder
*
* Returns: currently requested samples per frame
* Returns: currently minimum requested samples per frame
*
* Since: 0.10.36
*/
gint
gst_audio_encoder_get_frame_samples (GstAudioEncoder * enc)
gst_audio_encoder_get_frame_samples_min (GstAudioEncoder * enc)
{
g_return_val_if_fail (GST_IS_AUDIO_ENCODER (enc), 0);
return enc->priv->ctx.frame_samples;
return enc->priv->ctx.frame_samples_min;
}
/**
* gst_audio_encoder_set_frame_samples_max:
* @enc: a #GstAudioEncoder
* @num: number of samples per frame
*
* Sets number of samples (per channel) subclass needs to be handed,
* at most or will be handed all available if 0.
*
* Since: 0.10.36
*/
void
gst_audio_encoder_set_frame_samples_max (GstAudioEncoder * enc, gint num)
{
g_return_if_fail (GST_IS_AUDIO_ENCODER (enc));
enc->priv->ctx.frame_samples_max = num;
}
/**
* gst_audio_encoder_get_frame_samples_min:
* @enc: a #GstAudioEncoder
*
* Returns: currently maximum requested samples per frame
*
* Since: 0.10.36
*/
gint
gst_audio_encoder_get_frame_samples_max (GstAudioEncoder * enc)
{
g_return_val_if_fail (GST_IS_AUDIO_ENCODER (enc), 0);
return enc->priv->ctx.frame_samples_max;
}
/**
@ -1734,7 +1776,8 @@ gst_audio_encoder_get_frame_samples (GstAudioEncoder * enc)
* @enc: a #GstAudioEncoder
* @num: number of frames
*
* Sets max number of frames accepted at once (assumed minimally 1)
* Sets max number of frames accepted at once (assumed minimally 1).
* Requires @frame_samples_min and @frame_samples_max to be the equal.
*
* Since: 0.10.36
*/

8
gst-libs/gst/audio/gstaudioencoder.h
View file

@ -203,9 +203,13 @@ GstCaps * gst_audio_encoder_proxy_getcaps (GstAudioEncoder * enc,
/* context parameters */
GstAudioInfo * gst_audio_encoder_get_audio_info (GstAudioEncoder * enc);
gint gst_audio_encoder_get_frame_samples (GstAudioEncoder * enc);
gint gst_audio_encoder_get_frame_samples_min (GstAudioEncoder * enc);
void gst_audio_encoder_set_frame_samples (GstAudioEncoder * enc, gint num);
void gst_audio_encoder_set_frame_samples_min (GstAudioEncoder * enc, gint num);
gint gst_audio_encoder_get_frame_samples_max (GstAudioEncoder * enc);
void gst_audio_encoder_set_frame_samples_max (GstAudioEncoder * enc, gint num);
gint gst_audio_encoder_get_frame_max (GstAudioEncoder * enc);