mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-30 13:41:48 +00:00
Code Issues 1 Projects Releases Wiki Activity

Fix mpegdemux, implement caching

Browse source 
Original commit message from CVS:
Fix mpegdemux, implement caching
This commit is contained in:
Wim Taymans 2002-11-27 21:00:12 +00:00
parent ce28203420
commit a82c0aa533
5 changed files with 254 additions and 132 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

225
gst/mpegstream/gstmpegdemux.c
View file

@ -127,15 +127,20 @@ GST_PAD_TEMPLATE_FACTORY (subtitle_factory,
)
);
static void gst_mpeg_demux_class_init (GstMPEGDemuxClass *klass);
static void gst_mpeg_demux_init (GstMPEGDemux *mpeg_demux);
static void gst_mpeg_demux_class_init (GstMPEGDemuxClass *klass);
static void gst_mpeg_demux_init (GstMPEGDemux *mpeg_demux);
static gboolean gst_mpeg_demux_parse_packhead (GstMPEGParse *mpeg_parse, GstBuffer *buffer);
static gboolean gst_mpeg_demux_parse_syshead (GstMPEGParse *mpeg_parse, GstBuffer *buffer);
static gboolean gst_mpeg_demux_parse_packet (GstMPEGParse *mpeg_parse, GstBuffer *buffer);
static gboolean gst_mpeg_demux_parse_pes (GstMPEGParse *mpeg_parse, GstBuffer *buffer);
static void gst_mpeg_demux_send_data (GstMPEGParse *mpeg_parse, GstData *data, GstClockTime time);
static void gst_mpeg_demux_handle_discont (GstMPEGParse *mpeg_parse);
static gboolean gst_mpeg_demux_parse_packhead (GstMPEGParse *mpeg_parse, GstBuffer *buffer);
static gboolean gst_mpeg_demux_parse_syshead (GstMPEGParse *mpeg_parse, GstBuffer *buffer);
static gboolean gst_mpeg_demux_parse_packet (GstMPEGParse *mpeg_parse, GstBuffer *buffer);
static gboolean gst_mpeg_demux_parse_pes (GstMPEGParse *mpeg_parse, GstBuffer *buffer);
static void gst_mpeg_demux_send_data (GstMPEGParse *mpeg_parse,
GstData *data, GstClockTime time);
static void gst_mpeg_demux_handle_discont (GstMPEGParse *mpeg_parse);
static void gst_mpeg_demux_set_cache (GstElement *element, GstCache *cache);
static GstCache* gst_mpeg_demux_get_cache (GstElement *element);
static GstElementStateReturn
gst_mpeg_demux_change_state (GstElement *element);
@ -177,6 +182,8 @@ gst_mpeg_demux_class_init (GstMPEGDemuxClass *klass)
gstelement_class = (GstElementClass *) klass;
gstelement_class->change_state = gst_mpeg_demux_change_state;
gstelement_class->set_cache = gst_mpeg_demux_set_cache;
gstelement_class->get_cache = gst_mpeg_demux_get_cache;
mpeg_parse_class->parse_packhead = gst_mpeg_demux_parse_packhead;
mpeg_parse_class->parse_syshead = gst_mpeg_demux_parse_syshead;
@ -200,23 +207,33 @@ gst_mpeg_demux_init (GstMPEGDemux *mpeg_demux)
gst_element_remove_pad (GST_ELEMENT (mpeg_parse), mpeg_parse->srcpad);
/* i think everything is already zero'd, but oh well*/
for (i=0;i<NUM_PRIVATE_1_PADS;i++) {
mpeg_demux->private_1_pad[i] = NULL;
for (i=0;i<NUM_PRIVATE_1_STREAMS;i++) {
mpeg_demux->private_1_stream[i] = NULL;
}
for (i=0;i<NUM_SUBTITLE_PADS;i++) {
mpeg_demux->subtitle_pad[i] = NULL;
for (i=0;i<NUM_SUBTITLE_STREAMS;i++) {
mpeg_demux->subtitle_stream[i] = NULL;
}
mpeg_demux->private_2_pad = NULL;
for (i=0;i<NUM_VIDEO_PADS;i++) {
mpeg_demux->video_pad[i] = NULL;
mpeg_demux->private_2_stream = NULL;
for (i=0;i<NUM_VIDEO_STREAMS;i++) {
mpeg_demux->video_stream[i] = NULL;
}
for (i=0;i<NUM_AUDIO_PADS;i++) {
mpeg_demux->audio_pad[i] = NULL;
for (i=0;i<NUM_AUDIO_STREAMS;i++) {
mpeg_demux->audio_stream[i] = NULL;
}
GST_FLAG_SET (mpeg_demux, GST_ELEMENT_EVENT_AWARE);
}
static GstMPEGStream*
gst_mpeg_demux_new_stream (void)
{
GstMPEGStream *stream;
stream = g_new0 (GstMPEGStream, 1);
return stream;
}
static void
gst_mpeg_demux_send_data (GstMPEGParse *mpeg_parse, GstData *data, GstClockTime time)
{
@ -245,26 +262,26 @@ gst_mpeg_demux_handle_discont (GstMPEGParse *mpeg_parse)
GST_DEBUG (GST_CAT_EVENT, "discont %llu\n", current_time);
for (i=0;i<NUM_VIDEO_PADS;i++) {
if (mpeg_demux->video_pad[i] &&
GST_PAD_IS_USABLE (mpeg_demux->video_pad[i]))
for (i=0;i<NUM_VIDEO_STREAMS;i++) {
if (mpeg_demux->video_stream[i] &&
GST_PAD_IS_USABLE (mpeg_demux->video_stream[i]->pad))
{
GstEvent *discont;
discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME,
current_time, NULL);
gst_pad_push (mpeg_demux->video_pad[i], GST_BUFFER (discont));
gst_pad_push (mpeg_demux->video_stream[i]->pad, GST_BUFFER (discont));
}
if (mpeg_demux->audio_pad[i] &&
GST_PAD_IS_USABLE (mpeg_demux->audio_pad[i]))
if (mpeg_demux->audio_stream[i] &&
GST_PAD_IS_USABLE (mpeg_demux->audio_stream[i]->pad))
{
GstEvent *discont;
discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME,
current_time, NULL);
gst_pad_push (mpeg_demux->audio_pad[i], GST_BUFFER (discont));
gst_pad_push (mpeg_demux->audio_stream[i]->pad, GST_BUFFER (discont));
}
}
}
@ -325,7 +342,7 @@ gst_mpeg_demux_parse_syshead (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
guint16 STD_buffer_size_bound;
guint32 buf_byte_size_bound;
gchar *name = NULL;
GstPad **outpad = NULL;
GstMPEGStream **outstream = NULL;
GstPadTemplate *newtemp = NULL;
stream_id = *buf++;
@ -355,24 +372,24 @@ gst_mpeg_demux_parse_syshead (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
/* private_stream_1 */
case 0xBD:
name = NULL;
outpad = NULL;
outstream = NULL;
break;
/* private_stream_2 */
case 0xBF:
name = g_strdup_printf ("private_stream_2");
outpad = &mpeg_demux->private_2_pad;
outstream = &mpeg_demux->private_2_stream;
newtemp = GST_PAD_TEMPLATE_GET (private2_factory);
break;
/* Audio */
case 0xC0 ... 0xDF:
name = g_strdup_printf ("audio_%02d", stream_id & 0x1F);
outpad = &mpeg_demux->audio_pad[stream_id & 0x1F];
outstream = &mpeg_demux->audio_stream[stream_id & 0x1F];
newtemp = GST_PAD_TEMPLATE_GET (audio_factory);
break;
/* Video */
case 0xE0 ... 0xEF:
name = g_strdup_printf ("video_%02d", stream_id & 0x0F);
outpad = &mpeg_demux->video_pad[stream_id & 0x0F];
outstream = &mpeg_demux->video_stream[stream_id & 0x0F];
if (!GST_MPEG_PARSE_IS_MPEG2 (mpeg_demux)) {
newtemp = GST_PAD_TEMPLATE_GET (video_mpeg1_factory);
}
@ -394,7 +411,12 @@ gst_mpeg_demux_parse_syshead (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
* this should trigger the NEW_PAD signal, which should be caught by
* the app and used to attach to desired streams.
*/
if (outpad && *outpad == NULL) {
if (outstream && *outstream == NULL) {
GstPad **outpad;
*outstream = gst_mpeg_demux_new_stream ();
outpad = &((*outstream)->pad);
*outpad = gst_pad_new_from_template (newtemp, name);
gst_pad_try_set_caps (*outpad, gst_pad_get_pad_template_caps (*outpad));
@ -406,6 +428,11 @@ gst_mpeg_demux_parse_syshead (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
gst_element_add_pad (GST_ELEMENT (mpeg_demux), (*outpad));
if (mpeg_demux->cache) {
gst_cache_get_writer_id (mpeg_demux->cache, GST_OBJECT (*outpad),
&(*outstream)->cache_id);
}
if (GST_PAD_IS_USABLE (*outpad)) {
GstEvent *event;
gint64 time;
@ -424,12 +451,6 @@ gst_mpeg_demux_parse_syshead (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
g_free (name);
}
mpeg_demux->STD_buffer_info[j].stream_id = stream_id;
mpeg_demux->STD_buffer_info[j].STD_buffer_bound_scale =
STD_buffer_bound_scale;
mpeg_demux->STD_buffer_info[j].STD_buffer_size_bound =
STD_buffer_size_bound;
j++;
}
}
@ -453,9 +474,11 @@ gst_mpeg_demux_parse_packet (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
guint16 datalen;
GstPad **outpad = NULL;
GstMPEGStream **outstream = NULL;
GstPad *outpad = NULL;
GstBuffer *outbuf;
guint8 *buf, *basebuf;
gint64 timestamp;
GST_DEBUG (0, "in parse_packet");
@ -559,7 +582,7 @@ done:
case 0x80 ... 0x87:
GST_DEBUG (0, "0x%02X: we have a private_stream_1 (AC3) packet, track %d",
id, ps_id_code - 0x80);
outpad = &mpeg_demux->private_1_pad[ps_id_code - 0x80];
outstream = &mpeg_demux->private_1_stream[ps_id_code - 0x80];
/* scrap first 4 bytes (so-called "mystery AC3 tag") */
headerlen += 4;
datalen -= 4;
@ -571,55 +594,66 @@ done:
/* private_stream_2 */
case 0xBF:
GST_DEBUG (0, "0x%02X: we have a private_stream_2 packet", id);
outpad = &mpeg_demux->private_2_pad;
outstream = &mpeg_demux->private_2_stream;
break;
/* audio */
case 0xC0 ... 0xDF:
GST_DEBUG (0, "0x%02X: we have an audio packet", id);
outpad = &mpeg_demux->audio_pad[id & 0x1F];
outstream = &mpeg_demux->audio_stream[id & 0x1F];
break;
/* video */
case 0xE0 ... 0xEF:
GST_DEBUG (0, "0x%02X: we have a video packet", id);
outpad = &mpeg_demux->video_pad[id & 0x0F];
outstream = &mpeg_demux->video_stream[id & 0x0F];
break;
default:
break;
}
/* if we don't know what it is, bail */
if (outpad == NULL) {
if (outstream == NULL) {
GST_DEBUG (0, "unknown packet id 0x%02X !!", id);
return FALSE;
}
outpad = (*outstream)->pad;
/* the pad should have been created in parse_syshead */
if ((*outpad) == NULL) {
if (outpad == NULL) {
GST_DEBUG (0, "unexpected packet id 0x%02X!!", id);
return FALSE;
}
/* attach pts, if any */
if (pts != -1) {
pts += mpeg_parse->adjust;
timestamp = MPEGTIME_TO_GSTTIME (pts);
if (mpeg_demux->cache) {
gst_cache_add_association (mpeg_demux->cache,
(*outstream)->cache_id, 0,
GST_FORMAT_BYTES, GST_BUFFER_OFFSET (buffer),
GST_FORMAT_TIME, timestamp,
0);
}
}
else {
timestamp = GST_CLOCK_TIME_NONE;
}
/* create the buffer and send it off to the Other Side */
if (GST_PAD_IS_CONNECTED(*outpad) && datalen > 0) {
if (GST_PAD_IS_CONNECTED (outpad) && datalen > 0) {
GST_DEBUG (0, "creating subbuffer len %d", datalen);
/* if this is part of the buffer, create a subbuffer */
outbuf = gst_buffer_create_sub (buffer, headerlen + 4, datalen);
/* attach pts, if any */
if (pts != -1) {
pts += mpeg_parse->adjust;
GST_BUFFER_TIMESTAMP (outbuf) = MPEGTIME_TO_GSTTIME (pts);
}
else {
GST_BUFFER_TIMESTAMP (outbuf) = -1LL;
}
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
GST_DEBUG (0, "pushing buffer of len %d id %d, ts %lld",
datalen, id, GST_BUFFER_TIMESTAMP (outbuf));
gst_pad_push ((*outpad), outbuf);
gst_pad_push (outpad, outbuf);
}
return TRUE;
@ -639,6 +673,7 @@ gst_mpeg_demux_parse_pes (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
guint16 headerlen;
guint8 ps_id_code = 0x80;
GstMPEGStream **outstream = NULL;
GstPad **outpad = NULL;
GstBuffer *outbuf;
GstPadTemplate *newtemp = NULL;
@ -723,7 +758,7 @@ gst_mpeg_demux_parse_pes (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
case 0x80 ... 0x87:
GST_DEBUG (0, "we have a private_stream_1 (AC3) packet, track %d",
ps_id_code - 0x80);
outpad = &mpeg_demux->private_1_pad[ps_id_code - 0x80];
outstream = &mpeg_demux->private_1_stream[ps_id_code - 0x80];
/* scrap first 4 bytes (so-called "mystery AC3 tag") */
headerlen += 4;
datalen -= 4;
@ -731,7 +766,7 @@ gst_mpeg_demux_parse_pes (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
case 0x20 ... 0x2f:
GST_DEBUG (0, "we have a subtitle_stream packet, track %d",
ps_id_code - 0x20);
outpad = &mpeg_demux->subtitle_pad[ps_id_code - 0x20];
outstream = &mpeg_demux->subtitle_stream[ps_id_code - 0x20];
headerlen += 1;
datalen -= 1;
break;
@ -744,17 +779,17 @@ gst_mpeg_demux_parse_pes (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
/* private_stream_2 */
case 0xBF:
GST_DEBUG (0, "we have a private_stream_2 packet");
outpad = &mpeg_demux->private_2_pad;
outstream = &mpeg_demux->private_2_stream;
break;
/* audio */
case 0xC0 ... 0xDF:
GST_DEBUG (0, "we have an audio packet");
outpad = &mpeg_demux->audio_pad[id - 0xC0];
outstream = &mpeg_demux->audio_stream[id - 0xC0];
break;
/* video */
case 0xE0 ... 0xEF:
GST_DEBUG (0, "we have a video packet");
outpad = &mpeg_demux->video_pad[id - 0xE0];
outstream = &mpeg_demux->video_stream[id - 0xE0];
break;
default:
GST_DEBUG (0, "we have a unkown packet");
@ -762,13 +797,13 @@ gst_mpeg_demux_parse_pes (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
}
/* if we don't know what it is, bail */
if (outpad == NULL)
if (outstream == NULL)
return TRUE;
/* create the pad and add it if we don't already have one. */
/* this should trigger the NEW_PAD signal, which should be caught by */
/* the app and used to attach to desired streams. */
if ((*outpad) == NULL) {
if ((*outstream) == NULL) {
gchar *name = NULL;
/* we have to name the stream approriately */
@ -811,9 +846,12 @@ gst_mpeg_demux_parse_pes (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
}
if (newtemp) {
*outstream = gst_mpeg_demux_new_stream ();
outpad = &((*outstream)->pad);
/* create the pad and add it to self */
(*outpad) = gst_pad_new_from_template (newtemp, name);
gst_pad_try_set_caps ((*outpad), gst_pad_get_pad_template_caps (*outpad));
*outpad = gst_pad_new_from_template (newtemp, name);
gst_pad_try_set_caps (*outpad, gst_pad_get_pad_template_caps (*outpad));
gst_pad_set_formats_function (*outpad, gst_mpeg_parse_get_src_formats);
gst_pad_set_event_mask_function (*outpad, gst_mpeg_parse_get_src_event_masks);
@ -821,7 +859,12 @@ gst_mpeg_demux_parse_pes (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
gst_pad_set_query_type_function (*outpad, gst_mpeg_parse_get_src_query_types);
gst_pad_set_query_function (*outpad, gst_mpeg_parse_handle_src_query);
gst_element_add_pad(GST_ELEMENT(mpeg_demux),(*outpad));
gst_element_add_pad(GST_ELEMENT(mpeg_demux), *outpad);
if (mpeg_demux->cache) {
gst_cache_get_writer_id (mpeg_demux->cache, GST_OBJECT (*outpad),
&(*outstream)->cache_id);
}
}
else {
g_warning ("cannot create pad %s, no template for %02x", name, id);
@ -830,23 +873,39 @@ gst_mpeg_demux_parse_pes (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
g_free (name);
}
/* create the buffer and send it off to the Other Side */
if (GST_PAD_IS_USABLE(*outpad)) {
/* if this is part of the buffer, create a subbuffer */
GST_DEBUG (0,"creating subbuffer len %d", datalen);
if (*outstream) {
gint64 timestamp;
outbuf = gst_buffer_create_sub (buffer, headerlen+4, datalen);
outpad = &((*outstream)->pad);
/* attach pts, if any */
if (pts != -1) {
pts += mpeg_parse->adjust;
timestamp = MPEGTIME_TO_GSTTIME (pts);
GST_BUFFER_TIMESTAMP (outbuf) = MPEGTIME_TO_GSTTIME (pts);
if (mpeg_demux->cache) {
gst_cache_add_association (mpeg_demux->cache,
(*outstream)->cache_id, 0,
GST_FORMAT_BYTES, GST_BUFFER_OFFSET (buffer),
GST_FORMAT_TIME, timestamp,
0);
}
}
else {
GST_BUFFER_TIMESTAMP (outbuf) = -1LL;
timestamp = GST_CLOCK_TIME_NONE;
}
gst_pad_push((*outpad),outbuf);
/* create the buffer and send it off to the Other Side */
if (*outpad && GST_PAD_IS_USABLE(*outpad)) {
/* if this is part of the buffer, create a subbuffer */
GST_DEBUG (0,"creating subbuffer len %d", datalen);
outbuf = gst_buffer_create_sub (buffer, headerlen+4, datalen);
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
gst_pad_push(*outpad,outbuf);
}
}
return TRUE;
@ -871,6 +930,28 @@ gst_mpeg_demux_change_state (GstElement *element)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
}
static void
gst_mpeg_demux_set_cache (GstElement *element, GstCache *cache)
{
GstMPEGDemux *mpeg_demux;
GST_ELEMENT_CLASS (parent_class)->set_cache (element, cache);
mpeg_demux = GST_MPEG_DEMUX (element);
mpeg_demux->cache = cache;
}
static GstCache*
gst_mpeg_demux_get_cache (GstElement *element)
{
GstMPEGDemux *mpeg_demux;
mpeg_demux = GST_MPEG_DEMUX (element);
return mpeg_demux->cache;
}
gboolean
gst_mpeg_demux_plugin_init (GModule *module, GstPlugin *plugin)

55
gst/mpegstream/gstmpegdemux.h
View file

@ -46,41 +46,23 @@ extern "C" {
typedef struct _GstMPEGDemux GstMPEGDemux;
typedef struct _GstMPEGDemuxClass GstMPEGDemuxClass;
typedef struct _MPEG1Stream MPEG1Stream;
typedef struct _GstMPEGStream GstMPEGStream;
struct _MPEG1Stream {
guchar stream_id;
gint8 STD_buffer_bound_scale;
gint16 STD_buffer_size_bound;
};
typedef struct _GstMPEG1StreamContext GstMPEG1StreamContext;
struct _GstMPEGStreamContext {
GstPad *pad;
guint64 pts;
struct _GstMPEGStream {
gint8 STD_buffer_bound_scale;
gint16 STD_buffer_size_bound;
GstPad *pad;
guint64 pts;
gint cache_id;
};
struct _GstMPEGDemux {
GstMPEGParse parent;
/* current parse state */
guchar id;
/* previous partial chunk and bytes remaining in it */
gboolean in_flush;
/* counters */
gulong packs;
/* pack header values */
gboolean have_packhead;
guint64 scr_base;
guint16 scr_extension;
guint32 bit_rate;
/* program stream header values */
gboolean have_syshead;
guint16 header_length;
guint32 rate_bound;
guint8 audio_bound;
@ -90,19 +72,20 @@ struct _GstMPEGDemux {
gboolean video_lock;
guint8 video_bound;
gboolean packet_rate_restriction;
struct _MPEG1Stream STD_buffer_info[48];
#define NUM_PRIVATE_1_PADS 8
#define NUM_SUBTITLE_PADS 16
#define NUM_VIDEO_PADS 16
#define NUM_AUDIO_PADS 32
#define NUM_PRIVATE_1_STREAMS 8
#define NUM_SUBTITLE_STREAMS 16
#define NUM_VIDEO_STREAMS 16
#define NUM_AUDIO_STREAMS 32
/* stream output pads */
GstPad *private_1_pad[NUM_PRIVATE_1_PADS]; /* up to 8 ac3 audio tracks */
GstPad *subtitle_pad[NUM_SUBTITLE_PADS];
GstPad *private_2_pad;
GstPad *video_pad[NUM_VIDEO_PADS];
GstPad *audio_pad[NUM_AUDIO_PADS];
/* stream output */
GstMPEGStream *private_1_stream[NUM_PRIVATE_1_STREAMS]; /* up to 8 ac3 audio tracks */
GstMPEGStream *subtitle_stream[NUM_SUBTITLE_STREAMS];
GstMPEGStream *private_2_stream;
GstMPEGStream *video_stream[NUM_VIDEO_STREAMS];
GstMPEGStream *audio_stream[NUM_AUDIO_STREAMS];
GstCache *cache;
};
struct _GstMPEGDemuxClass {

2
gst/mpegstream/gstmpegpacketize.c
View file

@ -250,6 +250,8 @@ gst_mpeg_packetize_read (GstMPEGPacketize *packetize)
gst_bytestream_get_status (packetize->bs, &remaining, &event);
etype = event? GST_EVENT_TYPE (event) : GST_EVENT_EOS;
g_print ("remaining %d\n", remaining);
switch (etype) {
case GST_EVENT_DISCONTINUOUS:
GST_DEBUG (GST_CAT_EVENT, "packetize: discont\n");

97
gst/mpegstream/gstmpegparse.c
View file

@ -22,6 +22,8 @@
#include "gstmpegparse.h"
#include "gstmpegclock.h"
static GstFormat scr_format;
/* elementfactory information */
static GstElementDetails mpeg_parse_details = {
"MPEG System Parser",
@ -36,6 +38,8 @@ static GstElementDetails mpeg_parse_details = {
#define CLASS(o) GST_MPEG_PARSE_CLASS (G_OBJECT_GET_CLASS (o))
#define DEFAULT_MAX_DISCONT 10000
/* GstMPEGParse signals and args */
enum {
/* FILL ME */
@ -47,6 +51,7 @@ enum {
ARG_BIT_RATE,
ARG_MPEG2,
ARG_SYNC,
ARG_MAX_DISCONT,
/* FILL ME */
};
@ -94,6 +99,8 @@ static void gst_mpeg_parse_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static void gst_mpeg_parse_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec);
static void gst_mpeg_parse_set_cache (GstElement *element, GstCache *tc);
static GstCache* gst_mpeg_parse_get_cache (GstElement *element);
static GstElementClass *parent_class = NULL;
/*static guint gst_mpeg_parse_signals[LAST_SIGNAL] = { 0 };*/
@ -139,11 +146,19 @@ gst_mpeg_parse_class_init (GstMPEGParseClass *klass)
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SYNC,
g_param_spec_boolean ("sync", "Sync", "Synchronize on the stream SCR",
FALSE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MAX_DISCONT,
g_param_spec_int ("max_discont", "Max Discont", "The maximun allowed SCR discontinuity",
0, G_MAXINT, DEFAULT_MAX_DISCONT, G_PARAM_READWRITE));
gobject_class->get_property = gst_mpeg_parse_get_property;
gobject_class->set_property = gst_mpeg_parse_set_property;
gstelement_class->change_state = gst_mpeg_parse_change_state;
gstelement_class->get_clock = gst_mpeg_parse_get_clock;
gstelement_class->set_clock = gst_mpeg_parse_set_clock;
gstelement_class->get_cache = gst_mpeg_parse_get_cache;
gstelement_class->set_cache = gst_mpeg_parse_set_cache;
klass->parse_packhead = gst_mpeg_parse_parse_packhead;
klass->parse_syshead = NULL;
@ -182,12 +197,10 @@ gst_mpeg_parse_init (GstMPEGParse *mpeg_parse)
mpeg_parse->mux_rate = 0;
mpeg_parse->discont_pending = FALSE;
mpeg_parse->scr_pending = TRUE;
mpeg_parse->max_discont = DEFAULT_MAX_DISCONT;
mpeg_parse->provided_clock = gst_mpeg_clock_new ("MPEGParseClock",
gst_mpeg_parse_get_time, mpeg_parse);
GST_ELEMENT (mpeg_parse)->getclockfunc = gst_mpeg_parse_get_clock;
GST_ELEMENT (mpeg_parse)->setclockfunc = gst_mpeg_parse_set_clock;
GST_FLAG_SET (mpeg_parse, GST_ELEMENT_EVENT_AWARE);
}
@ -270,7 +283,7 @@ static gboolean
gst_mpeg_parse_parse_packhead (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
{
guint8 *buf;
guint64 scr, scr_adj;
guint64 scr, scr_adj, scr_orig;
guint32 scr1, scr2;
guint32 new_rate;
@ -299,8 +312,6 @@ gst_mpeg_parse_parse_packhead (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
scr, scr_ext, scr1, scr2, mpeg_parse->bytes_since_scr,
scr - mpeg_parse->current_scr);
mpeg_parse->bytes_since_scr = 0;
buf += 6;
new_rate = (GUINT32_FROM_BE ((*(guint32 *) buf)) & 0xfffffc00) >> 10;
}
@ -309,13 +320,13 @@ gst_mpeg_parse_parse_packhead (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
scr |= (scr1 & 0x00fffe00) << 6;
scr |= (scr1 & 0x000000ff) << 7;
scr |= (scr2 & 0xfe000000) >> 25;
mpeg_parse->bytes_since_scr = 0;
buf += 5;
new_rate = (GUINT32_FROM_BE ((*(guint32 *) buf)) & 0x7ffffe00) >> 9;
}
scr_orig = scr;
mpeg_parse->bytes_since_scr = 0;
scr_adj = scr + mpeg_parse->adjust;
GST_DEBUG (0, "SCR is %llu (%llu) next: %lld (%lld) diff: %lld (%lld)",
@ -327,7 +338,7 @@ gst_mpeg_parse_parse_packhead (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
MPEGTIME_TO_GSTTIME (scr) -
MPEGTIME_TO_GSTTIME (mpeg_parse->next_scr));
if (ABS ((gint64)mpeg_parse->next_scr - (gint64)(scr_adj)) > 10000) {
if (ABS ((gint64)mpeg_parse->next_scr - (gint64)(scr_adj)) > mpeg_parse->max_discont) {
GST_DEBUG (0, "discontinuity detected; expected: %llu got: %llu real:%lld adjust:%lld",
mpeg_parse->next_scr, scr_adj, scr, mpeg_parse->adjust);
@ -340,8 +351,16 @@ gst_mpeg_parse_parse_packhead (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
scr = scr_adj;
}
if (mpeg_parse->cache) {
/* update cache if any */
gst_cache_add_association (mpeg_parse->cache, mpeg_parse->cache_id,
GST_ACCOCIATION_FLAG_KEY_UNIT,
GST_FORMAT_BYTES, GST_BUFFER_OFFSET (buffer),
GST_FORMAT_TIME, MPEGTIME_TO_GSTTIME (scr),
scr_format, scr_orig, 0);
}
mpeg_parse->current_scr = scr;
mpeg_parse->scr_pending = FALSE;
if (mpeg_parse->mux_rate != new_rate) {
@ -466,17 +485,23 @@ gst_mpeg_parse_loop (GstElement *element)
bss = mpeg_parse->bytes_since_scr;
br = mpeg_parse->mux_rate * 50;
if (GST_MPEG_PACKETIZE_IS_MPEG2 (mpeg_parse->packetize)) {
/*
* The mpeg spec says something like this, but that doesn't really work:
*
* mpeg_parse->next_scr = (scr * br + bss * 90000LL) / (90000LL + br);
*/
mpeg_parse->next_scr = scr + (bss * 90000LL) / br;
if (br) {
if (GST_MPEG_PACKETIZE_IS_MPEG2 (mpeg_parse->packetize)) {
/*
* The mpeg spec says something like this, but that doesn't really work:
*
* mpeg_parse->next_scr = (scr * br + bss * 90000LL) / (90000LL + br);
*/
mpeg_parse->next_scr = scr + (bss * 90000LL) / br;
}
else {
/* we are interpolating the scr here */
mpeg_parse->next_scr = scr + (bss * 90000LL) / br;
}
}
else {
/* we are interpolating the scr here */
mpeg_parse->next_scr = scr + (bss * 90000LL) / br;
/* no bitrate known */
mpeg_parse->next_scr = scr;
}
GST_DEBUG (0, "size: %lld, total since SCR: %lld, next SCR: %lld",
@ -660,6 +685,9 @@ gst_mpeg_parse_get_property (GObject *object, guint prop_id, GValue *value, GPar
case ARG_SYNC:
g_value_set_boolean (value, mpeg_parse->sync);
break;
case ARG_MAX_DISCONT:
g_value_set_int (value, mpeg_parse->max_discont);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -672,19 +700,44 @@ gst_mpeg_parse_set_property (GObject *object, guint prop_id,
{
GstMPEGParse *mpeg_parse;
/* it's not null if we got it, but it might not be ours */
mpeg_parse = GST_MPEG_PARSE(object);
mpeg_parse = GST_MPEG_PARSE (object);
switch (prop_id) {
case ARG_SYNC:
mpeg_parse->sync = g_value_get_boolean (value);
break;
case ARG_MAX_DISCONT:
mpeg_parse->max_discont = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mpeg_parse_set_cache (GstElement *element, GstCache *cache)
{
GstMPEGParse *mpeg_parse;
mpeg_parse = GST_MPEG_PARSE (element);
mpeg_parse->cache = cache;
gst_cache_get_writer_id (cache, GST_OBJECT (mpeg_parse->sinkpad),
&mpeg_parse->cache_id);
gst_cache_add_format (cache, mpeg_parse->cache_id, scr_format);
}
static GstCache*
gst_mpeg_parse_get_cache (GstElement *element)
{
GstMPEGParse *mpeg_parse;
mpeg_parse = GST_MPEG_PARSE (element);
return mpeg_parse->cache;
}
gboolean
gst_mpeg_parse_plugin_init (GModule *module, GstPlugin *plugin)
@ -700,6 +753,8 @@ gst_mpeg_parse_plugin_init (GModule *module, GstPlugin *plugin)
&mpeg_parse_details);
g_return_val_if_fail(factory != NULL, FALSE);
scr_format = gst_format_register ("scr", "The MPEG system clock reference time");
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (src_factory));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (sink_factory));

7
gst/mpegstream/gstmpegparse.h
View file

@ -21,13 +21,10 @@
#ifndef __MPEG_PARSE_H__
#define __MPEG_PARSE_H__
#include <config.h>
#include <gst/gst.h>
#include <gst/bytestream/bytestream.h>
#include "gstmpegpacketize.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
@ -68,10 +65,14 @@ struct _GstMPEGParse {
gboolean discont_pending;
gboolean scr_pending;
gint max_discont;
GstClock *provided_clock;
GstClock *clock;
gboolean sync;
GstCache *cache;
gint cache_id;
};
struct _GstMPEGParseClass {