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dvdlpcmdec: rewrite to use GstAudioDecoder

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=765807
This commit is contained in:
Michael Olbrich 2016-04-28 16:32:53 +02:00 committed by Sebastian Dröge
parent 9b6b6d1fd5
commit 35dc8d0f68
2 changed files with 189 additions and 335 deletions
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509
gst/dvdlpcmdec/gstdvdlpcmdec.c
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@ -56,65 +56,31 @@ GST_STATIC_PAD_TEMPLATE ("src",
"channels = (int) [ 1, 8 ]") "channels = (int) [ 1, 8 ]")
); );
/* DvdLpcmDec signals and args */ #define gst_dvdlpcmdec_parent_class parent_class
enum G_DEFINE_TYPE (GstDvdLpcmDec, gst_dvdlpcmdec, GST_TYPE_AUDIO_DECODER);
{
/* FILL ME */
LAST_SIGNAL
};
enum static gboolean gst_dvdlpcmdec_set_format (GstAudioDecoder * bdec,
{ GstCaps * caps);
PROP_0 static GstFlowReturn gst_dvdlpcmdec_parse (GstAudioDecoder * bdec,
/* FILL ME */ GstAdapter * adapter, gint * offset, gint * len);
}; static GstFlowReturn gst_dvdlpcmdec_handle_frame (GstAudioDecoder * bdec,
static void gst_dvdlpcmdec_base_init (gpointer g_class);
static void gst_dvdlpcmdec_class_init (GstDvdLpcmDecClass * klass);
static void gst_dvdlpcmdec_init (GstDvdLpcmDec * dvdlpcmdec);
static GstFlowReturn gst_dvdlpcmdec_chain_raw (GstPad * pad, GstObject * parent,
GstBuffer * buffer); GstBuffer * buffer);
static GstFlowReturn gst_dvdlpcmdec_chain_dvd (GstPad * pad, GstObject * parent, static GstFlowReturn gst_dvdlpcmdec_chain (GstPad * pad, GstObject * parent,
GstBuffer * buffer); GstBuffer * buffer);
static gboolean gst_dvdlpcmdec_setcaps (GstPad * pad, GstCaps * caps);
static gboolean dvdlpcmdec_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static GstStateChangeReturn gst_dvdlpcmdec_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class = NULL;
GType
gst_dvdlpcmdec_get_type (void)
{
static GType dvdlpcmdec_type = 0;
if (!dvdlpcmdec_type) {
static const GTypeInfo dvdlpcmdec_info = {
sizeof (GstDvdLpcmDecClass),
gst_dvdlpcmdec_base_init,
NULL,
(GClassInitFunc) gst_dvdlpcmdec_class_init,
NULL,
NULL,
sizeof (GstDvdLpcmDec),
0,
(GInstanceInitFunc) gst_dvdlpcmdec_init,
};
dvdlpcmdec_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstDvdLpcmDec",
&dvdlpcmdec_info, 0);
}
return dvdlpcmdec_type;
}
static void static void
gst_dvdlpcmdec_base_init (gpointer g_class) gst_dvdlpcmdec_class_init (GstDvdLpcmDecClass * klass)
{ {
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); GstElementClass *element_class;
GstAudioDecoderClass *gstbase_class;
element_class = (GstElementClass *) klass;
gstbase_class = (GstAudioDecoderClass *) klass;
gstbase_class->set_format = GST_DEBUG_FUNCPTR (gst_dvdlpcmdec_set_format);
gstbase_class->parse = GST_DEBUG_FUNCPTR (gst_dvdlpcmdec_parse);
gstbase_class->handle_frame = GST_DEBUG_FUNCPTR (gst_dvdlpcmdec_handle_frame);
gst_element_class_add_static_pad_template (element_class, gst_element_class_add_static_pad_template (element_class,
&gst_dvdlpcmdec_sink_template); &gst_dvdlpcmdec_sink_template);
@ -124,18 +90,8 @@ gst_dvdlpcmdec_base_init (gpointer g_class)
"DVD LPCM Audio decoder", "Codec/Decoder/Audio", "DVD LPCM Audio decoder", "Codec/Decoder/Audio",
"Decode DVD LPCM frames into standard PCM audio", "Decode DVD LPCM frames into standard PCM audio",
"Jan Schmidt <jan@noraisin.net>, Michael Smith <msmith@fluendo.com>"); "Jan Schmidt <jan@noraisin.net>, Michael Smith <msmith@fluendo.com>");
}
static void GST_DEBUG_CATEGORY_INIT (dvdlpcm_debug, "dvdlpcmdec", 0, "DVD LPCM Decoder");
gst_dvdlpcmdec_class_init (GstDvdLpcmDecClass * klass)
{
GstElementClass *gstelement_class;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gstelement_class->change_state = gst_dvdlpcmdec_change_state;
} }
static void static void
@ -145,27 +101,28 @@ gst_dvdlpcm_reset (GstDvdLpcmDec * dvdlpcmdec)
dvdlpcmdec->dynamic_range = 0; dvdlpcmdec->dynamic_range = 0;
dvdlpcmdec->emphasis = FALSE; dvdlpcmdec->emphasis = FALSE;
dvdlpcmdec->mute = FALSE; dvdlpcmdec->mute = FALSE;
dvdlpcmdec->timestamp = GST_CLOCK_TIME_NONE;
dvdlpcmdec->header = 0; dvdlpcmdec->header = 0;
gst_segment_init (&dvdlpcmdec->segment, GST_FORMAT_UNDEFINED); dvdlpcmdec->mode = GST_LPCM_UNKNOWN;
} }
static void static void
gst_dvdlpcmdec_init (GstDvdLpcmDec * dvdlpcmdec) gst_dvdlpcmdec_init (GstDvdLpcmDec * dvdlpcmdec)
{ {
dvdlpcmdec->sinkpad =
gst_pad_new_from_static_template (&gst_dvdlpcmdec_sink_template, "sink");
gst_pad_set_event_function (dvdlpcmdec->sinkpad, dvdlpcmdec_sink_event);
gst_element_add_pad (GST_ELEMENT (dvdlpcmdec), dvdlpcmdec->sinkpad);
dvdlpcmdec->srcpad =
gst_pad_new_from_static_template (&gst_dvdlpcmdec_src_template, "src");
gst_pad_use_fixed_caps (dvdlpcmdec->srcpad);
gst_element_add_pad (GST_ELEMENT (dvdlpcmdec), dvdlpcmdec->srcpad);
gst_dvdlpcm_reset (dvdlpcmdec); gst_dvdlpcm_reset (dvdlpcmdec);
gst_audio_decoder_set_use_default_pad_acceptcaps (GST_AUDIO_DECODER_CAST
(dvdlpcmdec), TRUE);
GST_PAD_SET_ACCEPT_TEMPLATE (GST_AUDIO_DECODER_SINK_PAD (dvdlpcmdec));
/* retrieve and intercept base class chain.
* Quite HACKish, but that's dvd specs/caps for you,
* since one buffer needs to be split into 2 frames */
dvdlpcmdec->base_chain =
GST_PAD_CHAINFUNC (GST_AUDIO_DECODER_SINK_PAD (dvdlpcmdec));
gst_pad_set_chain_function (GST_AUDIO_DECODER_SINK_PAD (dvdlpcmdec),
GST_DEBUG_FUNCPTR (gst_dvdlpcmdec_chain));
} }
static const GstAudioChannelPosition channel_positions[][8] = { static const GstAudioChannelPosition channel_positions[][8] = {
@ -209,31 +166,26 @@ gst_dvdlpcmdec_send_tags (GstDvdLpcmDec * dvdlpcmdec)
taglist = gst_tag_list_new (GST_TAG_AUDIO_CODEC, "LPCM Audio", taglist = gst_tag_list_new (GST_TAG_AUDIO_CODEC, "LPCM Audio",
GST_TAG_BITRATE, bitrate, NULL); GST_TAG_BITRATE, bitrate, NULL);
gst_pad_push_event (dvdlpcmdec->srcpad, gst_event_new_tag (taglist)); gst_audio_decoder_merge_tags (GST_AUDIO_DECODER (dvdlpcmdec), taglist,
GST_TAG_MERGE_REPLACE);
gst_tag_list_unref (taglist);
} }
static gboolean static gboolean
gst_dvdlpcmdec_set_outcaps (GstDvdLpcmDec * dvdlpcmdec) gst_dvdlpcmdec_set_output_format (GstDvdLpcmDec * dvdlpcmdec)
{ {
gboolean res = TRUE; gboolean res = TRUE;
GstCaps *src_caps;
/* Build caps to set on the src pad, which we know from the incoming caps */ res = gst_audio_decoder_set_output_format (GST_AUDIO_DECODER (dvdlpcmdec),
src_caps = gst_audio_info_to_caps (&dvdlpcmdec->info); &dvdlpcmdec->info);
res = gst_pad_set_caps (dvdlpcmdec->srcpad, src_caps);
if (res) { if (res) {
GST_DEBUG_OBJECT (dvdlpcmdec, "Successfully set output caps: %" GST_DEBUG_OBJECT (dvdlpcmdec, "Successfully set output format");
GST_PTR_FORMAT, src_caps);
gst_dvdlpcmdec_send_tags (dvdlpcmdec); gst_dvdlpcmdec_send_tags (dvdlpcmdec);
} else { } else {
GST_DEBUG_OBJECT (dvdlpcmdec, "Failed to set output caps: %" GST_DEBUG_OBJECT (dvdlpcmdec, "Failed to set output format");
GST_PTR_FORMAT, src_caps);
} }
gst_caps_unref (src_caps);
return res; return res;
} }
@ -253,41 +205,42 @@ gst_dvdlpcmdec_update_audio_formats (GstDvdLpcmDec * dec, gint channels,
guint c; guint c;
position = channel_positions[channels - 1]; position = channel_positions[channels - 1];
dec->lpcm_layout = position;
for (c = 0; c < channels; ++c) for (c = 0; c < channels; ++c)
sorted_position[c] = position[c]; sorted_position[c] = position[c];
gst_audio_channel_positions_to_valid_order (sorted_position, channels); gst_audio_channel_positions_to_valid_order (sorted_position, channels);
gst_audio_info_set_format (&dec->info, format, rate, channels, gst_audio_info_set_format (&dec->info, format, rate, channels,
sorted_position); sorted_position);
if (memcmp (position, sorted_position,
channels * sizeof (position[0])) != 0)
dec->lpcm_layout = position;
else
dec->lpcm_layout = NULL;
} else { } else {
gst_audio_info_set_format (&dec->info, format, rate, channels, NULL); gst_audio_info_set_format (&dec->info, format, rate, channels, NULL);
} }
} }
static gboolean static gboolean
gst_dvdlpcmdec_setcaps (GstPad * pad, GstCaps * caps) gst_dvdlpcmdec_set_format (GstAudioDecoder * bdec, GstCaps * caps)
{ {
GstDvdLpcmDec *dvdlpcmdec = GST_DVDLPCMDEC (bdec);
GstStructure *structure; GstStructure *structure;
gboolean res = TRUE; gboolean res = TRUE;
GstDvdLpcmDec *dvdlpcmdec;
GstAudioFormat format; GstAudioFormat format;
gint rate, channels, width; gint rate, channels, width;
g_return_val_if_fail (caps != NULL, FALSE); gst_dvdlpcm_reset (dvdlpcmdec);
g_return_val_if_fail (pad != NULL, FALSE);
dvdlpcmdec = GST_DVDLPCMDEC (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0); structure = gst_caps_get_structure (caps, 0);
/* If we have the DVD structured LPCM (including header) then we wait /* If we have the DVD structured LPCM (including header) then we wait
* for incoming data before creating the output pad caps */ * for incoming data before creating the output pad caps */
if (gst_structure_has_name (structure, "audio/x-private1-lpcm")) { if (gst_structure_has_name (structure, "audio/x-private1-lpcm")) {
gst_pad_set_chain_function (dvdlpcmdec->sinkpad, gst_dvdlpcmdec_chain_dvd); dvdlpcmdec->mode = GST_LPCM_DVD;
goto done; goto done;
} }
gst_pad_set_chain_function (dvdlpcmdec->sinkpad, gst_dvdlpcmdec_chain_raw); dvdlpcmdec->mode = GST_LPCM_RAW;
res &= gst_structure_get_int (structure, "rate", &rate); res &= gst_structure_get_int (structure, "rate", &rate);
res &= gst_structure_get_int (structure, "channels", &channels); res &= gst_structure_get_int (structure, "channels", &channels);
@ -318,59 +271,19 @@ gst_dvdlpcmdec_setcaps (GstPad * pad, GstCaps * caps)
dvdlpcmdec->width = width; dvdlpcmdec->width = width;
res = gst_dvdlpcmdec_set_outcaps (dvdlpcmdec); res = gst_dvdlpcmdec_set_output_format (dvdlpcmdec);
done: done:
gst_object_unref (dvdlpcmdec);
return res; return res;
/* ERRORS */ /* ERRORS */
caps_parse_error: caps_parse_error:
{ {
GST_DEBUG_OBJECT (dvdlpcmdec, "Couldn't get parameters; missing caps?"); GST_DEBUG_OBJECT (dvdlpcmdec, "Couldn't get parameters; missing caps?");
gst_object_unref (dvdlpcmdec);
return FALSE; return FALSE;
} }
} }
static void
update_timestamps (GstDvdLpcmDec * dvdlpcmdec, GstBuffer * buf, int samples)
{
gboolean take_buf_ts = FALSE;
gint rate;
rate = GST_AUDIO_INFO_RATE (&dvdlpcmdec->info);
GST_BUFFER_DURATION (buf) = gst_util_uint64_scale (samples, GST_SECOND, rate);
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
if (GST_CLOCK_TIME_IS_VALID (dvdlpcmdec->timestamp)) {
GstClockTimeDiff one_sample = GST_SECOND / rate;
GstClockTimeDiff diff = GST_CLOCK_DIFF (GST_BUFFER_TIMESTAMP (buf),
dvdlpcmdec->timestamp);
if (diff > one_sample || diff < -one_sample)
take_buf_ts = TRUE;
} else {
take_buf_ts = TRUE;
}
} else if (!GST_CLOCK_TIME_IS_VALID (dvdlpcmdec->timestamp)) {
dvdlpcmdec->timestamp = 0;
}
if (take_buf_ts) {
/* Take buffer timestamp */
dvdlpcmdec->timestamp = GST_BUFFER_TIMESTAMP (buf);
} else {
GST_BUFFER_TIMESTAMP (buf) = dvdlpcmdec->timestamp;
}
dvdlpcmdec->timestamp += GST_BUFFER_DURATION (buf);
GST_LOG_OBJECT (dvdlpcmdec, "Updated timestamp to %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
}
static void static void
parse_header (GstDvdLpcmDec * dec, guint32 header) parse_header (GstDvdLpcmDec * dec, guint32 header)
{ {
@ -430,73 +343,40 @@ parse_header (GstDvdLpcmDec * dec, guint32 header)
} }
static GstFlowReturn static GstFlowReturn
gst_dvdlpcmdec_chain_dvd (GstPad * pad, GstObject * parent, GstBuffer * buf) gst_dvdlpcmdec_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{ {
GstDvdLpcmDec *dvdlpcmdec; GstDvdLpcmDec *dvdlpcmdec = GST_DVDLPCMDEC (parent);
GstMapInfo map; guint8 data[2];
guint8 *data;
gsize size; gsize size;
guint first_access; guint first_access;
guint32 header;
GstBuffer *subbuf; GstBuffer *subbuf;
GstFlowReturn ret = GST_FLOW_OK; GstFlowReturn ret = GST_FLOW_OK;
gint off, len; gint off, len;
gint rate, channels;
dvdlpcmdec = GST_DVDLPCMDEC (parent); if (dvdlpcmdec->mode != GST_LPCM_DVD)
return dvdlpcmdec->base_chain (pad, parent, buf);
gst_buffer_map (buf, &map, GST_MAP_READ);
data = map.data;
size = map.size;
size = gst_buffer_get_size (buf);
if (size < 5) if (size < 5)
goto too_small; goto too_small;
/* We have a 5 byte header, now. gst_buffer_extract (buf, 0, data, 2);
* The first two bytes are a (big endian) 16 bit offset into our buffer.
* The buffer timestamp refers to this offset.
*
* The other three bytes are a (big endian) number in which the header is
* encoded.
*/
first_access = (data[0] << 8) | data[1]; first_access = (data[0] << 8) | data[1];
if (first_access > size) if (first_access > size)
goto invalid_data; goto invalid_data;
/* Don't keep the 'frame number' low 5 bits of the first byte */ /* After first_access, we have an additional 3 bytes of header data; this
header = ((data[2] & 0xC0) << 16) | (data[3] << 8) | data[4]; * is included within the value of first_access.
/* see if we have a new header */
if (header != dvdlpcmdec->header) {
parse_header (dvdlpcmdec, header);
if (!gst_dvdlpcmdec_set_outcaps (dvdlpcmdec))
goto negotiation_failed;
dvdlpcmdec->header = header;
}
GST_LOG_OBJECT (dvdlpcmdec, "first_access %d, buffer length %" G_GSIZE_FORMAT,
first_access, size);
rate = GST_AUDIO_INFO_RATE (&dvdlpcmdec->info);
channels = GST_AUDIO_INFO_CHANNELS (&dvdlpcmdec->info);
/* After first_access, we have an additional 3 bytes of data we've parsed and
* don't want to handle; this is included within the value of first_access.
* So a first_access value of between 1 and 3 is just broken, we treat that * So a first_access value of between 1 and 3 is just broken, we treat that
* the same as zero. first_access == 4 means we only need to create a single * the same as zero. first_access == 4 means we only need to create a single
* sub-buffer, greater than that we need to create two. */ * sub-buffer, greater than that we need to create two. */
/* skip access unit bytes and info */ /* skip access unit bytes */
off = 5; off = 2;
if (first_access > 4) { if (first_access > 4) {
guint samples = 0;
GstClockTime ts;
/* length of first buffer */ /* length of first buffer */
len = first_access - 4; len = first_access - 1;
GST_LOG_OBJECT (dvdlpcmdec, "Creating first sub-buffer off %d, len %d", GST_LOG_OBJECT (dvdlpcmdec, "Creating first sub-buffer off %d, len %d",
off, len); off, len);
@ -506,36 +386,8 @@ gst_dvdlpcmdec_chain_dvd (GstPad * pad, GstObject * parent, GstBuffer * buf)
goto bad_first_access; goto bad_first_access;
subbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, off, len); subbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, off, len);
GST_BUFFER_TIMESTAMP (subbuf) = GST_CLOCK_TIME_NONE;
/* If we don't have a stored timestamp from the last packet, ret = dvdlpcmdec->base_chain (pad, parent, subbuf);
* (it's straight after a new-segment, but we have one on the
* first access buffer, then calculate the timestamp to align
* this buffer to just before the first_access buffer */
if (!GST_CLOCK_TIME_IS_VALID (dvdlpcmdec->timestamp) &&
GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
switch (dvdlpcmdec->width) {
case 16:
samples = len / channels / 2;
break;
case 20:
samples = (len / channels) * 2 / 5;
break;
case 24:
samples = len / channels / 3;
break;
}
}
if (samples != 0) {
ts = gst_util_uint64_scale (samples, GST_SECOND, rate);
if (ts < GST_BUFFER_TIMESTAMP (buf))
GST_BUFFER_TIMESTAMP (subbuf) = GST_BUFFER_TIMESTAMP (buf) - ts;
else
GST_BUFFER_TIMESTAMP (subbuf) = 0;
} else {
GST_BUFFER_TIMESTAMP (subbuf) = GST_CLOCK_TIME_NONE;
}
ret = gst_dvdlpcmdec_chain_raw (pad, parent, subbuf);
if (ret != GST_FLOW_OK) if (ret != GST_FLOW_OK)
goto done; goto done;
@ -547,10 +399,14 @@ gst_dvdlpcmdec_chain_dvd (GstPad * pad, GstObject * parent, GstBuffer * buf)
len); len);
if (len > 0) { if (len > 0) {
GstMemory *header, *tmp;
subbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, off, len); subbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, off, len);
tmp = gst_buffer_peek_memory (buf, 0);
header = gst_memory_copy (tmp, 2, 3);
gst_buffer_prepend_memory (subbuf, header);
GST_BUFFER_TIMESTAMP (subbuf) = GST_BUFFER_TIMESTAMP (buf); GST_BUFFER_TIMESTAMP (subbuf) = GST_BUFFER_TIMESTAMP (buf);
ret = gst_dvdlpcmdec_chain_raw (pad, parent, subbuf); ret = dvdlpcmdec->base_chain (pad, parent, subbuf);
} }
} else { } else {
GST_LOG_OBJECT (dvdlpcmdec, GST_LOG_OBJECT (dvdlpcmdec,
@ -558,11 +414,10 @@ gst_dvdlpcmdec_chain_dvd (GstPad * pad, GstObject * parent, GstBuffer * buf)
size - off); size - off);
subbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, off, size - off); subbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, off, size - off);
GST_BUFFER_TIMESTAMP (subbuf) = GST_BUFFER_TIMESTAMP (buf); GST_BUFFER_TIMESTAMP (subbuf) = GST_BUFFER_TIMESTAMP (buf);
ret = gst_dvdlpcmdec_chain_raw (pad, parent, subbuf); ret = dvdlpcmdec->base_chain (pad, parent, subbuf);
} }
done: done:
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf); gst_buffer_unref (buf);
return ret; return ret;
@ -585,13 +440,6 @@ invalid_data:
ret = GST_FLOW_OK; ret = GST_FLOW_OK;
goto done; goto done;
} }
negotiation_failed:
{
GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, FORMAT, (NULL),
("Failed to configure output format"));
ret = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
bad_first_access: bad_first_access:
{ {
GST_WARNING_OBJECT (pad, "Bad first_access parameter in buffer"); GST_WARNING_OBJECT (pad, "Bad first_access parameter in buffer");
@ -604,15 +452,87 @@ bad_first_access:
} }
static GstFlowReturn static GstFlowReturn
gst_dvdlpcmdec_chain_raw (GstPad * pad, GstObject * parent, GstBuffer * buf) gst_dvdlpcmdec_parse_dvd (GstDvdLpcmDec * dvdlpcmdec, GstAdapter * adapter,
gint * offset, gint * len)
{ {
GstDvdLpcmDec *dvdlpcmdec; guint32 header;
const guint8 *data;
data = (const guint8 *) gst_adapter_map (adapter, 3);
if (!data)
goto too_small;
/* Don't keep the 'frame number' low 5 bits of the first byte */
header = ((data[0] & 0xC0) << 16) | (data[1] << 8) | data[2];
gst_adapter_unmap (adapter);
/* see if we have a new header */
if (header != dvdlpcmdec->header) {
parse_header (dvdlpcmdec, header);
if (!gst_dvdlpcmdec_set_output_format (dvdlpcmdec))
goto negotiation_failed;
dvdlpcmdec->header = header;
}
*offset = 3;
*len = gst_adapter_available (adapter) - 3;
return GST_FLOW_OK;
/* ERRORS */
too_small:
{
/* Buffer is too small */
GST_ELEMENT_WARNING (dvdlpcmdec, STREAM, DECODE,
("Invalid data found parsing LPCM packet"),
("LPCM packet was too small. Dropping"));
*offset = gst_adapter_available (adapter);
return GST_FLOW_EOS;
}
negotiation_failed:
{
GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, FORMAT, (NULL),
("Failed to configure output format"));
return GST_FLOW_NOT_NEGOTIATED;
}
}
static GstFlowReturn
gst_dvdlpcmdec_parse (GstAudioDecoder * bdec, GstAdapter * adapter,
gint * offset, gint * len)
{
GstDvdLpcmDec *dvdlpcmdec = GST_DVDLPCMDEC (bdec);
switch (dvdlpcmdec->mode) {
case GST_LPCM_UNKNOWN:
return GST_FLOW_NOT_NEGOTIATED;
case GST_LPCM_RAW:
*offset = 0;
*len = gst_adapter_available (adapter);
return GST_FLOW_OK;
case GST_LPCM_DVD:
return gst_dvdlpcmdec_parse_dvd (dvdlpcmdec, adapter, offset, len);
}
return GST_FLOW_ERROR;
}
static GstFlowReturn
gst_dvdlpcmdec_handle_frame (GstAudioDecoder * bdec, GstBuffer * buf)
{
GstDvdLpcmDec *dvdlpcmdec = GST_DVDLPCMDEC (bdec);
gsize size; gsize size;
GstFlowReturn ret; GstFlowReturn ret;
guint samples = 0; guint samples = 0;
gint rate, channels; gint rate, channels;
dvdlpcmdec = GST_DVDLPCMDEC (parent); /* no fancy draining */
if (G_UNLIKELY (!buf))
return GST_FLOW_OK;
size = gst_buffer_get_size (buf); size = gst_buffer_get_size (buf);
@ -626,9 +546,6 @@ gst_dvdlpcmdec_chain_raw (GstPad * pad, GstObject * parent, GstBuffer * buf)
if (rate == 0) if (rate == 0)
goto not_negotiated; goto not_negotiated;
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf))
dvdlpcmdec->timestamp = GST_BUFFER_TIMESTAMP (buf);
/* We don't currently do anything at all regarding emphasis, mute or /* We don't currently do anything at all regarding emphasis, mute or
* dynamic_range - I'm not sure what they're for */ * dynamic_range - I'm not sure what they're for */
switch (dvdlpcmdec->width) { switch (dvdlpcmdec->width) {
@ -639,7 +556,8 @@ gst_dvdlpcmdec_chain_raw (GstPad * pad, GstObject * parent, GstBuffer * buf)
samples = size / channels / 2; samples = size / channels / 2;
if (samples < 1) if (samples < 1)
goto drop; goto drop;
buf = gst_buffer_make_writable (buf);
gst_buffer_ref (buf);
break; break;
} }
case 20: case 20:
@ -688,7 +606,6 @@ gst_dvdlpcmdec_chain_raw (GstPad * pad, GstObject * parent, GstBuffer * buf)
} }
gst_buffer_unmap (outbuf, &destmap); gst_buffer_unmap (outbuf, &destmap);
gst_buffer_unmap (buf, &srcmap); gst_buffer_unmap (buf, &srcmap);
gst_buffer_unref (buf);
buf = outbuf; buf = outbuf;
break; break;
} }
@ -698,51 +615,57 @@ gst_dvdlpcmdec_chain_raw (GstPad * pad, GstObject * parent, GstBuffer * buf)
* and last byte are already correct */ * and last byte are already correct */
guint count = size / 12; guint count = size / 12;
gint i; gint i;
GstMapInfo map; GstMapInfo srcmap, destmap;
guint8 *ptr; guint8 *src, *dest;
GstBuffer *outbuf;
samples = size / channels / 3; samples = size / channels / 3;
if (samples < 1) if (samples < 1)
goto drop; goto drop;
/* Ensure our output buffer is writable */ outbuf = gst_buffer_new_allocate (NULL, size, NULL);
buf = gst_buffer_make_writable (buf); gst_buffer_copy_into (outbuf, buf, GST_BUFFER_COPY_TIMESTAMPS, 0, -1);
gst_buffer_map (buf, &map, GST_MAP_READWRITE); gst_buffer_map (buf, &srcmap, GST_MAP_READ);
ptr = map.data; gst_buffer_map (outbuf, &destmap, GST_MAP_READWRITE);
src = srcmap.data;
dest = destmap.data;
for (i = 0; i < count; i++) { for (i = 0; i < count; i++) {
guint8 tmp; dest[0] = src[0];
dest[1] = src[1];
dest[11] = src[11];
dest[10] = src[7];
dest[7] = src[5];
dest[5] = src[9];
dest[9] = src[6];
dest[6] = src[4];
dest[4] = src[3];
dest[3] = src[2];
dest[2] = src[8];
dest[8] = src[10];
tmp = ptr[10]; src += 12;
ptr[10] = ptr[7]; dest += 12;
ptr[7] = ptr[5];
ptr[5] = ptr[9];
ptr[9] = ptr[6];
ptr[6] = ptr[4];
ptr[4] = ptr[3];
ptr[3] = ptr[2];
ptr[2] = ptr[8];
ptr[8] = tmp;
ptr += 12;
} }
gst_buffer_unmap (buf, &map); gst_buffer_unmap (outbuf, &destmap);
gst_buffer_unmap (buf, &srcmap);
buf = outbuf;
break; break;
} }
default: default:
goto invalid_width; goto invalid_width;
} }
update_timestamps (dvdlpcmdec, buf, samples); if (dvdlpcmdec->lpcm_layout) {
buf = gst_buffer_make_writable (buf);
if (dvdlpcmdec->lpcm_layout)
gst_audio_buffer_reorder_channels (buf, dvdlpcmdec->info.finfo->format, gst_audio_buffer_reorder_channels (buf, dvdlpcmdec->info.finfo->format,
dvdlpcmdec->info.channels, dvdlpcmdec->lpcm_layout, dvdlpcmdec->info.channels, dvdlpcmdec->lpcm_layout,
dvdlpcmdec->info.position); dvdlpcmdec->info.position);
}
ret = gst_pad_push (dvdlpcmdec->srcpad, buf); ret = gst_audio_decoder_finish_frame (bdec, buf, 1);
done: done:
return ret; return ret;
@ -752,7 +675,6 @@ drop:
{ {
GST_DEBUG_OBJECT (dvdlpcmdec, GST_DEBUG_OBJECT (dvdlpcmdec,
"Buffer of size %" G_GSIZE_FORMAT " is too small. Dropping", size); "Buffer of size %" G_GSIZE_FORMAT " is too small. Dropping", size);
gst_buffer_unref (buf);
ret = GST_FLOW_OK; ret = GST_FLOW_OK;
goto done; goto done;
} }
@ -760,7 +682,6 @@ not_negotiated:
{ {
GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, FORMAT, (NULL), GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, FORMAT, (NULL),
("Buffer pushed before negotiation")); ("Buffer pushed before negotiation"));
gst_buffer_unref (buf);
ret = GST_FLOW_NOT_NEGOTIATED; ret = GST_FLOW_NOT_NEGOTIATED;
goto done; goto done;
} }
@ -768,88 +689,14 @@ invalid_width:
{ {
GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, WRONG_TYPE, (NULL), GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, WRONG_TYPE, (NULL),
("Invalid sample width configured")); ("Invalid sample width configured"));
gst_buffer_unref (buf);
ret = GST_FLOW_NOT_NEGOTIATED; ret = GST_FLOW_NOT_NEGOTIATED;
goto done; goto done;
} }
} }
static gboolean
dvdlpcmdec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstDvdLpcmDec *dvdlpcmdec;
gboolean res;
dvdlpcmdec = GST_DVDLPCMDEC (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
res = gst_dvdlpcmdec_setcaps (pad, caps);
gst_event_unref (event);
break;
}
case GST_EVENT_SEGMENT:
{
GstSegment seg;
gst_event_copy_segment (event, &seg);
GST_DEBUG_OBJECT (dvdlpcmdec, "segment %" GST_SEGMENT_FORMAT, &seg);
dvdlpcmdec->segment = seg;
if (seg.format == GST_FORMAT_TIME) {
dvdlpcmdec->timestamp = GST_CLOCK_TIME_NONE;
} else {
dvdlpcmdec->timestamp = 0;
}
res = gst_pad_push_event (dvdlpcmdec->srcpad, event);
break;
}
case GST_EVENT_FLUSH_STOP:
gst_segment_init (&dvdlpcmdec->segment, GST_FORMAT_UNDEFINED);
res = gst_pad_push_event (dvdlpcmdec->srcpad, event);
break;
default:
res = gst_pad_push_event (dvdlpcmdec->srcpad, event);
break;
}
return res;
}
static GstStateChangeReturn
gst_dvdlpcmdec_change_state (GstElement * element, GstStateChange transition)
{
GstDvdLpcmDec *dvdlpcmdec = GST_DVDLPCMDEC (element);
GstStateChangeReturn res;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_dvdlpcm_reset (dvdlpcmdec);
break;
default:
break;
}
res = parent_class->change_state (element, transition);
switch (transition) {
default:
break;
}
return res;
}
static gboolean static gboolean
plugin_init (GstPlugin * plugin) plugin_init (GstPlugin * plugin)
{ {
GST_DEBUG_CATEGORY_INIT (dvdlpcm_debug, "dvdlpcmdec", 0, "DVD LPCM Decoder");
if (!gst_element_register (plugin, "dvdlpcmdec", GST_RANK_PRIMARY, if (!gst_element_register (plugin, "dvdlpcmdec", GST_RANK_PRIMARY,
GST_TYPE_DVDLPCMDEC)) { GST_TYPE_DVDLPCMDEC)) {

15
gst/dvdlpcmdec/gstdvdlpcmdec.h
View file

@ -23,6 +23,7 @@
#include <gst/gst.h> #include <gst/gst.h>
#include <gst/audio/audio.h> #include <gst/audio/audio.h>
#include <gst/audio/gstaudiodecoder.h>
G_BEGIN_DECLS G_BEGIN_DECLS
@ -40,11 +41,18 @@ G_BEGIN_DECLS
typedef struct _GstDvdLpcmDec GstDvdLpcmDec; typedef struct _GstDvdLpcmDec GstDvdLpcmDec;
typedef struct _GstDvdLpcmDecClass GstDvdLpcmDecClass; typedef struct _GstDvdLpcmDecClass GstDvdLpcmDecClass;
typedef enum {
GST_LPCM_UNKNOWN,
GST_LPCM_RAW,
GST_LPCM_DVD,
} GstDvdLpcmMode;
struct _GstDvdLpcmDec { struct _GstDvdLpcmDec {
GstElement element; GstAudioDecoder element;
GstPad *sinkpad,*srcpad; GstPadChainFunction base_chain;
GstDvdLpcmMode mode;
guint32 header; guint32 header;
GstAudioInfo info; GstAudioInfo info;
@ -55,11 +63,10 @@ struct _GstDvdLpcmDec {
gint mute; gint mute;
GstClockTime timestamp; GstClockTime timestamp;
GstSegment segment;
}; };
struct _GstDvdLpcmDecClass { struct _GstDvdLpcmDecClass {
GstElementClass parent_class; GstAudioDecoderClass parent_class;
}; };
GType gst_dvdlpcmdec_get_type (void); GType gst_dvdlpcmdec_get_type (void);