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audiodecoder: Decouple setting of output format and downstream negotiation

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This makes the audio decoder base class more similar to the video
decoder base class.
This commit is contained in:
Sebastian Dröge 2012-08-09 15:02:27 +02:00
parent e37bb460bd
commit e1702d62a0
2 changed files with 93 additions and 49 deletions
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140
gst-libs/gst/audio/gstaudiodecoder.c
View file

@ -184,6 +184,7 @@ typedef struct _GstAudioDecoderContext
/* input */
/* (output) audio format */
GstAudioInfo info;
gboolean output_format_changed;
/* parsing state */
gboolean eos;
@ -524,64 +525,38 @@ gst_audio_decoder_finalize (GObject * object)
}
/**
* gst_audio_decoder_set_output_format:
* gst_audio_decoder_negotiate:
* @dec: a #GstAudioDecoder
* @info: #GstAudioInfo
*
* Configure output info on the srcpad of @dec.
* Negotiate with downstreame elements to currently configured #GstAudioInfo.
*
* Returns: %TRUE on success.
**/
* Returns: #TRUE if the negotiation succeeded, else #FALSE.
*/
gboolean
gst_audio_decoder_set_output_format (GstAudioDecoder * dec,
const GstAudioInfo * info)
gst_audio_decoder_negotiate (GstAudioDecoder * dec)
{
GstAudioDecoderClass *klass = GST_AUDIO_DECODER_GET_CLASS (dec);
GstAudioDecoderClass *klass;
gboolean res = TRUE;
guint old_rate;
GstCaps *caps = NULL;
GstCaps *templ_caps;
GstQuery *query = NULL;
GstAllocator *allocator;
GstAllocationParams params;
GST_DEBUG_OBJECT (dec, "Setting output format");
g_return_val_if_fail (GST_IS_AUDIO_DECODER (dec), FALSE);
g_return_val_if_fail (GST_AUDIO_INFO_IS_VALID (&dec->priv->ctx.info), FALSE);
klass = GST_AUDIO_DECODER_GET_CLASS (dec);
GST_AUDIO_DECODER_STREAM_LOCK (dec);
/* If the audio info can't be converted to caps,
* it was invalid */
caps = gst_audio_info_to_caps (info);
if (!caps)
goto refuse_caps;
/* Only allow caps that are a subset of the template caps */
templ_caps = gst_pad_get_pad_template_caps (dec->srcpad);
if (!gst_caps_is_subset (caps, templ_caps)) {
GST_WARNING_OBJECT (dec, "Requested output format %" GST_PTR_FORMAT
" do not match template %" GST_PTR_FORMAT, caps, templ_caps);
gst_caps_unref (caps);
gst_caps_unref (templ_caps);
goto refuse_caps;
}
gst_caps_unref (templ_caps);
/* adjust ts tracking to new sample rate */
old_rate = GST_AUDIO_INFO_RATE (&dec->priv->ctx.info);
if (GST_CLOCK_TIME_IS_VALID (dec->priv->base_ts) && old_rate) {
dec->priv->base_ts +=
GST_FRAMES_TO_CLOCK_TIME (dec->priv->samples, old_rate);
dec->priv->samples = 0;
}
/* copy the GstAudioInfo */
dec->priv->ctx.info = *info;
GST_DEBUG_OBJECT (dec, "setting src caps %" GST_PTR_FORMAT, caps);
caps = gst_audio_info_to_caps (&dec->priv->ctx.info);
res = gst_pad_set_caps (dec->srcpad, caps);
if (!res)
goto done;
dec->priv->ctx.output_format_changed = FALSE;
query = gst_query_new_allocation (caps, TRUE);
if (!gst_pad_peer_query (dec->srcpad, query)) {
@ -620,6 +595,75 @@ done:
return res;
/* ERRORS */
no_decide_allocation:
{
GST_WARNING_OBJECT (dec, "Subclass failed to decide allocation");
goto done;
}
}
/**
* gst_audio_decoder_set_output_format:
* @dec: a #GstAudioDecoder
* @info: #GstAudioInfo
*
* Configure output info on the srcpad of @dec.
*
* Returns: %TRUE on success.
**/
gboolean
gst_audio_decoder_set_output_format (GstAudioDecoder * dec,
const GstAudioInfo * info)
{
gboolean res = TRUE;
guint old_rate;
GstCaps *caps = NULL;
GstCaps *templ_caps;
g_return_val_if_fail (GST_IS_AUDIO_DECODER (dec), FALSE);
g_return_val_if_fail (GST_AUDIO_INFO_IS_VALID (info), FALSE);
GST_DEBUG_OBJECT (dec, "Setting output format");
GST_AUDIO_DECODER_STREAM_LOCK (dec);
/* If the audio info can't be converted to caps,
* it was invalid */
caps = gst_audio_info_to_caps (info);
if (!caps)
goto refuse_caps;
/* Only allow caps that are a subset of the template caps */
templ_caps = gst_pad_get_pad_template_caps (dec->srcpad);
if (!gst_caps_is_subset (caps, templ_caps)) {
GST_WARNING_OBJECT (dec, "Requested output format %" GST_PTR_FORMAT
" do not match template %" GST_PTR_FORMAT, caps, templ_caps);
gst_caps_unref (caps);
gst_caps_unref (templ_caps);
goto refuse_caps;
}
gst_caps_unref (templ_caps);
/* adjust ts tracking to new sample rate */
old_rate = GST_AUDIO_INFO_RATE (&dec->priv->ctx.info);
if (GST_CLOCK_TIME_IS_VALID (dec->priv->base_ts) && old_rate) {
dec->priv->base_ts +=
GST_FRAMES_TO_CLOCK_TIME (dec->priv->samples, old_rate);
dec->priv->samples = 0;
}
/* copy the GstAudioInfo */
dec->priv->ctx.info = *info;
dec->priv->ctx.output_format_changed = TRUE;
done:
GST_AUDIO_DECODER_STREAM_UNLOCK (dec);
gst_caps_unref (caps);
return res;
/* ERRORS */
refuse_caps:
{
@ -627,11 +671,6 @@ refuse_caps:
res = FALSE;
goto done;
}
no_decide_allocation:
{
GST_WARNING_OBJECT (dec, "Subclass failed to decide allocation");
goto done;
}
}
static gboolean
@ -915,8 +954,10 @@ gst_audio_decoder_finish_frame (GstAudioDecoder * dec, GstBuffer * buf,
GST_AUDIO_DECODER_STREAM_LOCK (dec);
if (G_UNLIKELY (buf && gst_pad_check_reconfigure (dec->srcpad))) {
if (!gst_audio_decoder_set_output_format (dec, &ctx->info)) {
if (buf && G_UNLIKELY (ctx->output_format_changed ||
(GST_AUDIO_INFO_IS_VALID (&ctx->info)
&& gst_pad_check_reconfigure (dec->srcpad)))) {
if (!gst_audio_decoder_negotiate (dec)) {
ret = GST_FLOW_NOT_NEGOTIATED;
goto exit;
}
@ -2827,9 +2868,10 @@ gst_audio_decoder_allocate_output_buffer (GstAudioDecoder * dec, gsize size)
GST_AUDIO_DECODER_STREAM_LOCK (dec);
if (G_UNLIKELY (GST_AUDIO_INFO_IS_VALID (&dec->priv->ctx.info)
&& gst_pad_check_reconfigure (dec->srcpad))) {
if (!gst_audio_decoder_set_output_format (dec, &dec->priv->ctx.info))
if (G_UNLIKELY (dec->priv->ctx.output_format_changed ||
(GST_AUDIO_INFO_IS_VALID (&dec->priv->ctx.info)
&& gst_pad_check_reconfigure (dec->srcpad)))) {
if (!gst_audio_decoder_negotiate (dec))
goto done;
}

2
gst-libs/gst/audio/gstaudiodecoder.h
View file

@ -273,6 +273,8 @@ GType gst_audio_decoder_get_type (void);
gboolean gst_audio_decoder_set_output_format (GstAudioDecoder * dec,
const GstAudioInfo * info);
gboolean gst_audio_decoder_negotiate (GstAudioDecoder * dec);
GstFlowReturn gst_audio_decoder_finish_frame (GstAudioDecoder * dec,
GstBuffer * buf, gint frames);