mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-12-18 06:16:36 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/ext/mpeg2dec/gstmpeg2dec.c
Andy Wingo aa5c8d66bd ext/: Don't take the stream lock. 
Original commit message from CVS:
2005-11-21  Andy Wingo  <wingo@pobox.com>

* ext/sidplay/gstsiddec.cc (gst_siddec_sink_event):
* ext/mpeg2dec/gstmpeg2dec.c (gst_mpeg2dec_sink_event):
* ext/mad/gstmad.c (gst_mad_sink_event):
* ext/a52dec/gsta52dec.c (gst_a52dec_sink_event): Don't take the
stream lock.

* gst/realmedia/rmdemux.c (gst_rmdemux_perform_seek): Update for
stream lock changes.
2005-11-21 17:34:30 +00:00

1432 lines
39 KiB
C
Raw Blame History

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <inttypes.h>
#include "gstmpeg2dec.h"
/* mpeg2dec changed a struct name after 0.3.1, here's a workaround */
/* mpeg2dec also only defined MPEG2_RELEASE after 0.3.1
#if MPEG2_RELEASE < MPEG2_VERSION(0,3,2)
*/
#ifndef MPEG2_RELEASE
#define MPEG2_VERSION(a,b,c) ((((a)&0xff)<<16)|(((b)&0xff)<<8)|((c)&0xff))
#define MPEG2_RELEASE MPEG2_VERSION(0,3,1)
typedef picture_t mpeg2_picture_t;
typedef gint mpeg2_state_t;
#define STATE_BUFFER 0
#endif
GST_DEBUG_CATEGORY_STATIC (mpeg2dec_debug);
#define GST_CAT_DEFAULT (mpeg2dec_debug)
/* table with framerates expressed as fractions */
static gdouble fpss[] = { 24.0 / 1.001, 24.0, 25.0,
30.0 / 1.001, 30.0, 50.0,
60.0 / 1.001, 60.0, 0
};
/* frame periods */
static guint frame_periods[] = {
1126125, 1125000, 1080000, 900900, 900000, 540000, 450450, 450000, 0
};
/* elementfactory information */
static GstElementDetails gst_mpeg2dec_details = {
"mpeg1 and mpeg2 video decoder",
"Codec/Decoder/Video",
"Uses libmpeg2 to decode MPEG video streams",
"Wim Taymans <wim.taymans@chello.be>",
};
/* Mpeg2dec signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0
/* FILL ME */
};
/*
* We can't use fractions in static pad templates, so
* we do something manual...
*/
static GstPadTemplate *
src_templ (void)
{
static GstPadTemplate *templ = NULL;
if (!templ) {
GstCaps *caps;
GstStructure *structure;
GValue list = { 0 }
, fps = {
0}
, fmt = {
0};
char *fmts[] = { "YV12", "I420", "Y42B", NULL };
guint n;
caps = gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC,
GST_MAKE_FOURCC ('I', '4', '2', '0'),
"width", GST_TYPE_INT_RANGE, 16, 4096,
"height", GST_TYPE_INT_RANGE, 16, 4096, NULL);
structure = gst_caps_get_structure (caps, 0);
g_value_init (&list, GST_TYPE_LIST);
g_value_init (&fps, G_TYPE_DOUBLE);
for (n = 0; fpss[n] != 0; n++) {
g_value_set_double (&fps, fpss[n]);
gst_value_list_append_value (&list, &fps);
}
gst_structure_set_value (structure, "framerate", &list);
g_value_unset (&list);
g_value_unset (&fps);
g_value_init (&list, GST_TYPE_LIST);
g_value_init (&fmt, GST_TYPE_FOURCC);
for (n = 0; fmts[n] != NULL; n++) {
gst_value_set_fourcc (&fmt, GST_STR_FOURCC (fmts[n]));
gst_value_list_append_value (&list, &fmt);
}
gst_structure_set_value (structure, "format", &list);
g_value_unset (&list);
g_value_unset (&fmt);
templ = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, caps);
}
return templ;
}
#ifdef enable_user_data
static GstStaticPadTemplate user_data_template_factory =
GST_STATIC_PAD_TEMPLATE ("user_data",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
#endif
static GstStaticPadTemplate sink_template_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpeg, "
"mpegversion = (int) [ 1, 2 ], " "systemstream = (boolean) false")
);
static void gst_mpeg2dec_base_init (gpointer g_class);
static void gst_mpeg2dec_class_init (GstMpeg2decClass * klass);
static void gst_mpeg2dec_init (GstMpeg2dec * mpeg2dec);
static void gst_mpeg2dec_dispose (GObject * object);
static void gst_mpeg2dec_reset (GstMpeg2dec * mpeg2dec);
static void gst_mpeg2dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_mpeg2dec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_mpeg2dec_set_index (GstElement * element, GstIndex * index);
static GstIndex *gst_mpeg2dec_get_index (GstElement * element);
static gboolean gst_mpeg2dec_src_event (GstPad * pad, GstEvent * event);
static const GstQueryType *gst_mpeg2dec_get_src_query_types (GstPad * pad);
static gboolean gst_mpeg2dec_src_query (GstPad * pad, GstQuery * query);
static gboolean gst_mpeg2dec_sink_convert (GstPad * pad, GstFormat src_format,
gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
static gboolean gst_mpeg2dec_src_convert (GstPad * pad, GstFormat src_format,
gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
static GstStateChangeReturn gst_mpeg2dec_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_mpeg2dec_sink_event (GstPad * pad, GstEvent * event);
static GstFlowReturn gst_mpeg2dec_chain (GstPad * pad, GstBuffer * buf);
//static gboolean gst_mpeg2dec_sink_query (GstPad * pad, GstQuery * query);
static GstCaps *gst_mpeg2dec_src_getcaps (GstPad * pad);
#if 0
static const GstFormat *gst_mpeg2dec_get_formats (GstPad * pad);
#endif
#if 0
static const GstEventMask *gst_mpeg2dec_get_event_masks (GstPad * pad);
#endif
static GstElementClass *parent_class = NULL;
static GstBuffer *crop_buffer (GstMpeg2dec * mpeg2dec, GstBuffer * input);
/*static guint gst_mpeg2dec_signals[LAST_SIGNAL] = { 0 };*/
GType
gst_mpeg2dec_get_type (void)
{
static GType mpeg2dec_type = 0;
if (!mpeg2dec_type) {
static const GTypeInfo mpeg2dec_info = {
sizeof (GstMpeg2decClass),
gst_mpeg2dec_base_init,
NULL,
(GClassInitFunc) gst_mpeg2dec_class_init,
NULL,
NULL,
sizeof (GstMpeg2dec),
0,
(GInstanceInitFunc) gst_mpeg2dec_init,
};
mpeg2dec_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstMpeg2dec", &mpeg2dec_info,
0);
}
GST_DEBUG_CATEGORY_INIT (mpeg2dec_debug, "mpeg2dec", 0,
"MPEG2 decoder element");
return mpeg2dec_type;
}
static void
gst_mpeg2dec_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class, src_templ ());
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template_factory));
#ifdef enable_user_data
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&user_data_template_factory));
#endif
gst_element_class_set_details (element_class, &gst_mpeg2dec_details);
}
static void
gst_mpeg2dec_class_init (GstMpeg2decClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->set_property = gst_mpeg2dec_set_property;
gobject_class->get_property = gst_mpeg2dec_get_property;
gobject_class->dispose = gst_mpeg2dec_dispose;
gstelement_class->change_state = gst_mpeg2dec_change_state;
gstelement_class->set_index = gst_mpeg2dec_set_index;
gstelement_class->get_index = gst_mpeg2dec_get_index;
}
static void
gst_mpeg2dec_init (GstMpeg2dec * mpeg2dec)
{
/* create the sink and src pads */
mpeg2dec->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&sink_template_factory), "sink");
gst_element_add_pad (GST_ELEMENT (mpeg2dec), mpeg2dec->sinkpad);
gst_pad_set_chain_function (mpeg2dec->sinkpad,
GST_DEBUG_FUNCPTR (gst_mpeg2dec_chain));
//gst_pad_set_query_function (mpeg2dec->sinkpad,
// GST_DEBUG_FUNCPTR (gst_mpeg2dec_get_sink_query));
gst_pad_set_event_function (mpeg2dec->sinkpad,
GST_DEBUG_FUNCPTR (gst_mpeg2dec_sink_event));
mpeg2dec->srcpad = gst_pad_new_from_template (src_templ (), "src");
gst_element_add_pad (GST_ELEMENT (mpeg2dec), mpeg2dec->srcpad);
gst_pad_set_getcaps_function (mpeg2dec->srcpad,
GST_DEBUG_FUNCPTR (gst_mpeg2dec_src_getcaps));
gst_pad_set_event_function (mpeg2dec->srcpad,
GST_DEBUG_FUNCPTR (gst_mpeg2dec_src_event));
gst_pad_set_query_type_function (mpeg2dec->srcpad,
GST_DEBUG_FUNCPTR (gst_mpeg2dec_get_src_query_types));
gst_pad_set_query_function (mpeg2dec->srcpad,
GST_DEBUG_FUNCPTR (gst_mpeg2dec_src_query));
#ifdef enable_user_data
mpeg2dec->userdatapad =
gst_pad_new_from_template (gst_static_pad_template_get
(&user_data_template_factory), "user_data");
gst_element_add_pad (GST_ELEMENT (mpeg2dec), mpeg2dec->userdatapad);
#endif
/* initialize the mpeg2dec acceleration */
}
static void
gst_mpeg2dec_dispose (GObject * object)
{
GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (object);
if (mpeg2dec->decoder) {
GST_DEBUG_OBJECT (mpeg2dec, "closing decoder");
mpeg2_close (mpeg2dec->decoder);
mpeg2dec->decoder = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_mpeg2dec_reset (GstMpeg2dec * mpeg2dec)
{
/* reset the initial video state */
mpeg2dec->format = MPEG2DEC_FORMAT_NONE;
mpeg2dec->width = -1;
mpeg2dec->height = -1;
mpeg2dec->segment_start = 0;
mpeg2dec->segment_end = -1;
mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE;
mpeg2dec->frame_period = 0;
mpeg2dec->need_sequence = TRUE;
mpeg2dec->next_time = 0;
mpeg2dec->offset = 0;
mpeg2_reset (mpeg2dec->decoder, 1);
}
static void
gst_mpeg2dec_set_index (GstElement * element, GstIndex * index)
{
GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (element);
mpeg2dec->index = index;
gst_index_get_writer_id (index, GST_OBJECT (element), &mpeg2dec->index_id);
}
static GstIndex *
gst_mpeg2dec_get_index (GstElement * element)
{
GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (element);
return mpeg2dec->index;
}
static GstBuffer *
crop_buffer (GstMpeg2dec * mpeg2dec, GstBuffer * input)
{
unsigned char *in_data;
unsigned char *out_data;
unsigned int h_subsample;
unsigned int v_subsample;
unsigned int line;
GstBuffer *outbuf = input;
/*We crop only if the target region is smaller than the input one */
if ((mpeg2dec->decoded_width > mpeg2dec->width) ||
(mpeg2dec->decoded_height > mpeg2dec->height)) {
/* If we don't know about the format, we just return the original
* buffer.
*/
if (mpeg2dec->format == MPEG2DEC_FORMAT_I422 ||
mpeg2dec->format == MPEG2DEC_FORMAT_I420 ||
mpeg2dec->format == MPEG2DEC_FORMAT_YV12) {
/*FIXME: I have tried to use gst_buffer_copy_on_write, but it
* still have some artifact, so I'me allocating new buffer
* for each frame decoded...
*/
if (mpeg2dec->format == MPEG2DEC_FORMAT_I422) {
outbuf =
gst_buffer_new_and_alloc (mpeg2dec->width * mpeg2dec->height * 2);
h_subsample = 2;
v_subsample = 1;
} else {
outbuf =
gst_buffer_new_and_alloc (mpeg2dec->width * mpeg2dec->height * 1.5);
h_subsample = 2;
v_subsample = 2;
}
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (input);
GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (input);
GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (input);
/* Copy Y first */
in_data = GST_BUFFER_DATA (input);
out_data = GST_BUFFER_DATA (outbuf);
for (line = 0; line < mpeg2dec->height; line++) {
memcpy (out_data, in_data, mpeg2dec->width);
out_data += mpeg2dec->width;
in_data += mpeg2dec->decoded_width;
}
/* Now copy U & V */
in_data =
GST_BUFFER_DATA (input) +
mpeg2dec->decoded_width * mpeg2dec->decoded_height;
for (line = 0; line < mpeg2dec->height / v_subsample; line++) {
memcpy (out_data, in_data, mpeg2dec->width / h_subsample);
memcpy (out_data +
mpeg2dec->width * mpeg2dec->height / (v_subsample * h_subsample),
in_data +
mpeg2dec->decoded_width * mpeg2dec->decoded_height / (v_subsample *
h_subsample), mpeg2dec->width / h_subsample);
out_data += mpeg2dec->width / h_subsample;
in_data += mpeg2dec->decoded_width / h_subsample;
}
gst_buffer_unref (input);
}
}
return outbuf;
}
static GstFlowReturn
gst_mpeg2dec_alloc_buffer (GstMpeg2dec * mpeg2dec, gint64 offset,
GstBuffer ** obuf)
{
GstBuffer *outbuf = NULL;
gint size = mpeg2dec->decoded_width * mpeg2dec->decoded_height;
guint8 *buf[3], *out = NULL;
GstFlowReturn ret = GST_FLOW_OK;
if (mpeg2dec->format == MPEG2DEC_FORMAT_I422) {
ret =
gst_pad_alloc_buffer (mpeg2dec->srcpad, GST_BUFFER_OFFSET_NONE,
size * 2, GST_PAD_CAPS (mpeg2dec->srcpad), &outbuf);
if (ret != GST_FLOW_OK)
goto no_buffer;
out = GST_BUFFER_DATA (outbuf);
buf[0] = out;
buf[1] = buf[0] + size;
buf[2] = buf[1] + size / 2;
} else {
ret =
gst_pad_alloc_buffer (mpeg2dec->srcpad, GST_BUFFER_OFFSET_NONE,
(size * 3) / 2, GST_PAD_CAPS (mpeg2dec->srcpad), &outbuf);
if (ret != GST_FLOW_OK)
goto no_buffer;
out = GST_BUFFER_DATA (outbuf);
buf[0] = out;
if (mpeg2dec->format == MPEG2DEC_FORMAT_I420) {
buf[0] = out;
buf[1] = buf[0] + size;
buf[2] = buf[1] + size / 4;
} else {
buf[0] = out;
buf[2] = buf[0] + size;
buf[1] = buf[2] + size / 4;
}
}
mpeg2_set_buf (mpeg2dec->decoder, buf, outbuf);
/* we store the original byteoffset of this picture in the stream here
* because we need it for indexing */
GST_BUFFER_OFFSET (outbuf) = offset;
done:
if (ret != GST_FLOW_OK) {
outbuf = NULL; /* just to asure NULL return, looking the path
above it happens only when gst_pad_alloc_buffer
fails to alloc outbf */
}
*obuf = outbuf;
return ret;
/* ERRORS */
no_buffer:
{
if (GST_FLOW_IS_FATAL (ret)) {
GST_ELEMENT_ERROR (mpeg2dec, RESOURCE, FAILED, (NULL),
("Failed to allocate memory for buffer, reason %s",
gst_flow_get_name (ret)));
}
goto done;
}
}
static gboolean
gst_mpeg2dec_negotiate_format (GstMpeg2dec * mpeg2dec)
{
GstCaps *caps;
guint32 fourcc;
const mpeg2_info_t *info;
const mpeg2_sequence_t *sequence;
info = mpeg2_info (mpeg2dec->decoder);
sequence = info->sequence;
if (sequence->width != sequence->chroma_width &&
sequence->height != sequence->chroma_height) {
fourcc = GST_STR_FOURCC ("I420");
mpeg2dec->format = MPEG2DEC_FORMAT_I420;
} else if (sequence->width == sequence->chroma_width ||
sequence->height == sequence->chroma_height) {
fourcc = GST_STR_FOURCC ("Y42B");
mpeg2dec->format = MPEG2DEC_FORMAT_I422;
} else {
g_warning ("mpeg2dec: 4:4:4 format not yet supported");
return (FALSE);
}
caps = gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC, fourcc,
"width", G_TYPE_INT, mpeg2dec->width,
"height", G_TYPE_INT, mpeg2dec->height,
"pixel-aspect-ratio", GST_TYPE_FRACTION, mpeg2dec->pixel_width,
mpeg2dec->pixel_height,
"framerate", G_TYPE_DOUBLE, mpeg2dec->frame_rate, NULL);
gst_pad_set_caps (mpeg2dec->srcpad, caps);
gst_caps_unref (caps);
return TRUE;
}
static GstFlowReturn
handle_sequence (GstMpeg2dec * mpeg2dec, const mpeg2_info_t * info)
{
gint i;
GstBuffer *buf;
GstFlowReturn ret;
mpeg2dec->width = info->sequence->picture_width;
mpeg2dec->height = info->sequence->picture_height;
mpeg2dec->pixel_width = info->sequence->pixel_width;
mpeg2dec->pixel_height = info->sequence->pixel_height;
mpeg2dec->decoded_width = info->sequence->width;
mpeg2dec->decoded_height = info->sequence->height;
mpeg2dec->total_frames = 0;
/* find framerate */
for (i = 0; i < 9; i++) {
if (info->sequence->frame_period == frame_periods[i]) {
mpeg2dec->frame_rate = fpss[i];
}
}
mpeg2dec->frame_period = info->sequence->frame_period * GST_USECOND / 27;
GST_DEBUG_OBJECT (mpeg2dec,
"sequence flags: %d, frame period: %d (%g), frame rate: %g",
info->sequence->flags, info->sequence->frame_period,
(double) (mpeg2dec->frame_period) / GST_SECOND, mpeg2dec->frame_rate);
GST_DEBUG_OBJECT (mpeg2dec, "profile: %02x, colour_primaries: %d",
info->sequence->profile_level_id, info->sequence->colour_primaries);
GST_DEBUG_OBJECT (mpeg2dec, "transfer chars: %d, matrix coef: %d",
info->sequence->transfer_characteristics,
info->sequence->matrix_coefficients);
if (!gst_mpeg2dec_negotiate_format (mpeg2dec))
goto negotiate_failed;
mpeg2_custom_fbuf (mpeg2dec->decoder, 1);
ret = gst_mpeg2dec_alloc_buffer (mpeg2dec, mpeg2dec->offset, &buf);
if (ret != GST_FLOW_OK)
goto done;
/* libmpeg2 discards first buffer twice for some reason. */
gst_buffer_ref (buf);
mpeg2dec->need_sequence = FALSE;
done:
return ret;
negotiate_failed:
{
GST_ELEMENT_ERROR (mpeg2dec, CORE, NEGOTIATION, (NULL), (NULL));
ret = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
}
static GstFlowReturn
handle_picture (GstMpeg2dec * mpeg2dec, const mpeg2_info_t * info)
{
gboolean key_frame = FALSE;
GstBuffer *outbuf;
GstFlowReturn ret;
GST_DEBUG_OBJECT (mpeg2dec, "handle picture");
if (info->current_picture) {
key_frame =
(info->current_picture->flags & PIC_MASK_CODING_TYPE) ==
PIC_FLAG_CODING_TYPE_I;
}
ret = gst_mpeg2dec_alloc_buffer (mpeg2dec, mpeg2dec->offset, &outbuf);
if (ret != GST_FLOW_OK)
goto done;
GST_DEBUG_OBJECT (mpeg2dec, "picture %s, outbuf %p, offset %"
G_GINT64_FORMAT,
key_frame ? ", kf," : " ", outbuf, GST_BUFFER_OFFSET (outbuf)
);
if (mpeg2dec->discont_state == MPEG2DEC_DISC_NEW_PICTURE && key_frame)
mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_KEYFRAME;
mpeg2_skip (mpeg2dec->decoder, 0);
done:
return ret;
}
static GstFlowReturn
handle_slice (GstMpeg2dec * mpeg2dec, const mpeg2_info_t * info)
{
GstBuffer *outbuf = NULL;
GstFlowReturn ret = GST_FLOW_OK;
GST_DEBUG_OBJECT (mpeg2dec, "picture slice/end %p %p %p %p",
info->display_fbuf,
info->display_picture, info->current_picture,
(info->display_fbuf ? info->display_fbuf->id : NULL));
if (info->display_fbuf && info->display_fbuf->id) {
const mpeg2_picture_t *picture;
gboolean key_frame = FALSE;
GstClockTime time;
outbuf = GST_BUFFER (info->display_fbuf->id);
picture = info->display_picture;
key_frame =
(picture->flags & PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_I;
GST_DEBUG_OBJECT (mpeg2dec, "picture keyframe %d", key_frame);
if (!key_frame)
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
else
GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
if (mpeg2dec->discont_state == MPEG2DEC_DISC_NEW_KEYFRAME && key_frame)
mpeg2dec->discont_state = MPEG2DEC_DISC_NONE;
time = GST_CLOCK_TIME_NONE;
#if MPEG2_RELEASE < MPEG2_VERSION(0,4,0)
if (picture->flags & PIC_FLAG_PTS)
time = MPEG_TIME_TO_GST_TIME (picture->pts);
#else
if (picture->flags & PIC_FLAG_TAGS)
time = MPEG_TIME_TO_GST_TIME ((GstClockTime) (picture->
tag2) << 32 | picture->tag);
#endif
if (time == GST_CLOCK_TIME_NONE) {
time = mpeg2dec->next_time;
GST_DEBUG_OBJECT (mpeg2dec, "picture didn't have pts");
} else {
GST_DEBUG_OBJECT (mpeg2dec,
"picture had pts %" GST_TIME_FORMAT ", we had %"
GST_TIME_FORMAT, GST_TIME_ARGS (time),
GST_TIME_ARGS (mpeg2dec->next_time));
mpeg2dec->next_time = time;
}
GST_BUFFER_TIMESTAMP (outbuf) = time;
/* TODO set correct offset here based on frame number */
if (info->display_picture_2nd) {
GST_BUFFER_DURATION (outbuf) = (picture->nb_fields +
info->display_picture_2nd->nb_fields) * mpeg2dec->frame_period / 2;
} else {
GST_BUFFER_DURATION (outbuf) =
picture->nb_fields * mpeg2dec->frame_period / 2;
}
mpeg2dec->next_time += GST_BUFFER_DURATION (outbuf);
GST_DEBUG_OBJECT (mpeg2dec,
"picture: %s %s fields:%d off:%" G_GINT64_FORMAT " ts:%"
GST_TIME_FORMAT,
(picture->flags & PIC_FLAG_TOP_FIELD_FIRST ? "tff " : " "),
(picture->flags & PIC_FLAG_PROGRESSIVE_FRAME ? "prog" : " "),
picture->nb_fields, GST_BUFFER_OFFSET (outbuf),
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)));
if (mpeg2dec->index) {
gst_index_add_association (mpeg2dec->index, mpeg2dec->index_id,
(key_frame ? GST_ASSOCIATION_FLAG_KEY_UNIT : 0),
GST_FORMAT_BYTES, GST_BUFFER_OFFSET (outbuf),
GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (outbuf), 0);
}
if (picture->flags & PIC_FLAG_SKIP) {
GST_DEBUG_OBJECT (mpeg2dec, "dropping buffer because of skip flag");
} else if (mpeg2dec->discont_state != MPEG2DEC_DISC_NONE) {
GST_DEBUG_OBJECT (mpeg2dec, "dropping buffer, discont state %d",
mpeg2dec->discont_state);
} else if (mpeg2dec->next_time < mpeg2dec->segment_start) {
GST_DEBUG_OBJECT (mpeg2dec, "dropping buffer, next_time %"
GST_TIME_FORMAT " < segment_start %" GST_TIME_FORMAT,
GST_TIME_ARGS (mpeg2dec->next_time),
GST_TIME_ARGS (mpeg2dec->segment_start));
} else {
GST_LOG_OBJECT (mpeg2dec, "pushing buffer, timestamp %"
GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)));
if ((mpeg2dec->decoded_height > mpeg2dec->height) ||
(mpeg2dec->decoded_width > mpeg2dec->width)) {
/* CHECKME: this might unref outbuf and return a new buffer.
* Does this affect the info->discard_fbuf stuff below? */
outbuf = crop_buffer (mpeg2dec, outbuf);
}
gst_buffer_ref (outbuf);
ret = gst_pad_push (mpeg2dec->srcpad, outbuf);
}
}
if (info->discard_fbuf && info->discard_fbuf->id) {
GstBuffer *discard = GST_BUFFER (info->discard_fbuf->id);
gst_buffer_unref (discard);
GST_DEBUG_OBJECT (mpeg2dec, "Discarded buffer %p", discard);
}
return ret;
}
#if 0
static void
update_streaminfo (GstMpeg2dec * mpeg2dec)
{
GstCaps *caps;
GstProps *props;
GstPropsEntry *entry;
const mpeg2_info_t *info;
info = mpeg2_info (mpeg2dec->decoder);
props = gst_props_empty_new ();
entry =
gst_props_entry_new ("framerate",
G_TYPE_DOUBLE (GST_SECOND / (float) mpeg2dec->frame_period));
gst_props_add_entry (props, entry);
entry =
gst_props_entry_new ("bitrate",
G_TYPE_INT (info->sequence->byte_rate * 8));
gst_props_add_entry (props, entry);
caps = gst_caps_new ("mpeg2dec_streaminfo",
"application/x-gst-streaminfo", props);
gst_caps_replace_sink (&mpeg2dec->streaminfo, caps);
g_object_notify (G_OBJECT (mpeg2dec), "streaminfo");
}
#endif
static GstFlowReturn
gst_mpeg2dec_chain (GstPad * pad, GstBuffer * buf)
{
GstMpeg2dec *mpeg2dec;
guint32 size;
guint8 *data, *end;
GstClockTime pts;
const mpeg2_info_t *info;
mpeg2_state_t state;
gboolean done = FALSE;
GstFlowReturn ret = GST_FLOW_OK;
mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
size = GST_BUFFER_SIZE (buf);
data = GST_BUFFER_DATA (buf);
pts = GST_BUFFER_TIMESTAMP (buf);
GST_LOG_OBJECT (mpeg2dec, "received buffer, timestamp %"
GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
info = mpeg2dec->info;
end = data + size;
mpeg2dec->offset = GST_BUFFER_OFFSET (buf);
while (!done) {
GST_LOG_OBJECT (mpeg2dec, "calling parse");
state = mpeg2_parse (mpeg2dec->decoder);
GST_DEBUG_OBJECT (mpeg2dec, "parse state %d", state);
switch (state) {
case STATE_SEQUENCE:
ret = handle_sequence (mpeg2dec, info);
break;
case STATE_SEQUENCE_REPEATED:
GST_DEBUG_OBJECT (mpeg2dec, "sequence repeated");
break;
case STATE_GOP:
break;
case STATE_PICTURE:
ret = handle_picture (mpeg2dec, info);
break;
case STATE_SLICE_1ST:
GST_LOG_OBJECT (mpeg2dec, "1st slice of frame encountered");
break;
case STATE_PICTURE_2ND:
GST_LOG_OBJECT (mpeg2dec,
"Second picture header encountered. Decoding 2nd field");
break;
#if MPEG2_RELEASE >= MPEG2_VERSION (0, 4, 0)
case STATE_INVALID_END:
#endif
case STATE_END:
mpeg2dec->need_sequence = TRUE;
case STATE_SLICE:
ret = handle_slice (mpeg2dec, info);
break;
case STATE_BUFFER:
if (data == NULL) {
done = TRUE;
} else {
if (pts != GST_CLOCK_TIME_NONE) {
gint64 mpeg_pts = GST_TIME_TO_MPEG_TIME (pts);
GST_DEBUG_OBJECT (mpeg2dec,
"have pts: %" G_GINT64_FORMAT " (%" GST_TIME_FORMAT ")",
mpeg_pts, GST_TIME_ARGS (MPEG_TIME_TO_GST_TIME (mpeg_pts)));
#if MPEG2_RELEASE >= MPEG2_VERSION(0,4,0)
mpeg2_tag_picture (mpeg2dec->decoder, mpeg_pts & 0xffffffff,
mpeg_pts >> 32);
#else
mpeg2_pts (mpeg2dec->decoder, mpeg_pts);
#endif
} else {
GST_LOG ("no pts");
}
GST_LOG_OBJECT (mpeg2dec, "calling mpeg2_buffer");
mpeg2_buffer (mpeg2dec->decoder, data, end);
GST_LOG_OBJECT (mpeg2dec, "calling mpeg2_buffer done");
data = NULL;
}
break;
/* error */
case STATE_INVALID:
GST_WARNING_OBJECT (mpeg2dec, "Decoding error");
goto exit;
default:
GST_ERROR_OBJECT (mpeg2dec, "Unknown libmpeg2 state %d, FIXME", state);
break;
}
/*
* FIXME: should pass more information such as state the user data is from
*/
#ifdef enable_user_data
if (info->user_data_len > 0) {
GstBuffer *udbuf = gst_buffer_new_and_alloc (info->user_data_len);
memcpy (GST_BUFFER_DATA (udbuf), info->user_data, info->user_data_len);
gst_pad_push (mpeg2dec->userdatapad, udbuf);
}
#endif
if (ret != GST_FLOW_OK) {
mpeg2_reset (mpeg2dec->decoder, 0);
break;
}
}
gst_buffer_unref (buf);
return ret;
exit:
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
static gboolean
gst_mpeg2dec_sink_event (GstPad * pad, GstEvent * event)
{
GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
gboolean ret = TRUE;
GST_DEBUG_OBJECT (mpeg2dec, "Got %s event on sink pad",
GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:
{
mpeg2dec->next_time = -1;;
ret = gst_pad_event_default (pad, event);
break;
}
case GST_EVENT_FLUSH_START:
ret = gst_pad_event_default (pad, event);
break;
case GST_EVENT_FLUSH_STOP:
mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE;
mpeg2dec->next_time = -1;;
mpeg2_reset (mpeg2dec->decoder, 0);
ret = gst_pad_event_default (pad, event);
break;
case GST_EVENT_EOS:
if (mpeg2dec->index && mpeg2dec->closed) {
gst_index_commit (mpeg2dec->index, mpeg2dec->index_id);
}
ret = gst_pad_event_default (pad, event);
break;
default:
ret = gst_pad_event_default (pad, event);
break;
}
return ret;
}
static GstCaps *
gst_mpeg2dec_src_getcaps (GstPad * pad)
{
GstCaps *caps;
GST_OBJECT_LOCK (pad);
if (!(caps = GST_PAD_CAPS (pad)))
caps = (GstCaps *) gst_pad_get_pad_template_caps (pad);
caps = gst_caps_ref (caps);
GST_OBJECT_UNLOCK (pad);
return caps;
}
static gboolean
gst_mpeg2dec_sink_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
GstFormat * dest_format, gint64 * dest_value)
{
gboolean res = TRUE;
GstMpeg2dec *mpeg2dec;
const mpeg2_info_t *info;
mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
if (mpeg2dec->decoder == NULL)
return FALSE;
if (src_format == *dest_format) {
*dest_value = src_value;
return TRUE;
}
info = mpeg2_info (mpeg2dec->decoder);
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_TIME:
if (info->sequence && info->sequence->byte_rate) {
*dest_value = GST_SECOND * src_value / info->sequence->byte_rate;
break;
}
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
if (info->sequence && info->sequence->byte_rate) {
*dest_value = src_value * info->sequence->byte_rate / GST_SECOND;
break;
}
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
static gboolean
gst_mpeg2dec_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
GstFormat * dest_format, gint64 * dest_value)
{
gboolean res = TRUE;
GstMpeg2dec *mpeg2dec;
const mpeg2_info_t *info;
guint64 scale = 1;
mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
if (mpeg2dec->decoder == NULL)
return FALSE;
if (src_format == *dest_format) {
*dest_value = src_value;
return TRUE;
}
info = mpeg2_info (mpeg2dec->decoder);
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_TIME:
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
scale = 6 * (mpeg2dec->width * mpeg2dec->height >> 2);
case GST_FORMAT_DEFAULT:
if (info->sequence && mpeg2dec->frame_period) {
*dest_value = src_value * scale / mpeg2dec->frame_period;
break;
}
default:
res = FALSE;
}
break;
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value = src_value * mpeg2dec->frame_period;
break;
case GST_FORMAT_BYTES:
*dest_value =
src_value * 6 * ((mpeg2dec->width * mpeg2dec->height) >> 2);
break;
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
static const GstQueryType *
gst_mpeg2dec_get_src_query_types (GstPad * pad)
{
static const GstQueryType types[] = {
GST_QUERY_POSITION,
GST_QUERY_DURATION,
0
};
return types;
}
static gboolean
gst_mpeg2dec_src_query (GstPad * pad, GstQuery * query)
{
gboolean res = TRUE;
GstMpeg2dec *mpeg2dec;
mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
{
GstFormat format;
gint64 cur;
/* save requested format */
gst_query_parse_position (query, &format, NULL);
/* and convert to the requested format */
if (!gst_mpeg2dec_src_convert (pad, GST_FORMAT_TIME,
mpeg2dec->next_time, &format, &cur))
goto error;
gst_query_set_position (query, format, cur);
GST_LOG_OBJECT (mpeg2dec,
"position query: we return %llu (format %u)", cur, format);
break;
}
case GST_QUERY_DURATION:
{
GstFormat format;
GstFormat rformat;
gint64 total, total_bytes;
GstPad *peer;
if ((peer = gst_pad_get_peer (mpeg2dec->sinkpad)) == NULL)
goto error;
/* send to peer */
if ((res = gst_pad_query (peer, query))) {
gst_object_unref (peer);
goto done;
} else {
GST_LOG_OBJECT (mpeg2dec, "query on peer pad failed, trying bytes");
}
/* save requested format */
gst_query_parse_duration (query, &format, NULL);
/* query peer for total length in bytes */
gst_query_set_duration (query, GST_FORMAT_BYTES, -1);
if (!(res = gst_pad_query (peer, query))) {
GST_LOG_OBJECT (mpeg2dec, "query on peer pad failed");
gst_object_unref (peer);
goto error;
}
gst_object_unref (peer);
/* get the returned format */
gst_query_parse_duration (query, &rformat, &total_bytes);
GST_LOG_OBJECT (mpeg2dec, "peer pad returned total=%lld bytes",
total_bytes);
if (total_bytes != -1) {
if (!gst_mpeg2dec_sink_convert (pad, GST_FORMAT_BYTES, total_bytes,
&format, &total))
goto error;
} else {
total = -1;
}
gst_query_set_duration (query, format, total);
GST_LOG_OBJECT (mpeg2dec,
"position query: we return %llu (format %u)", total, format);
break;
}
default:
res = FALSE;
break;
}
done:
return res;
error:
GST_DEBUG ("error handling query");
return FALSE;
}
#if 0
static const GstEventMask *
gst_mpeg2dec_get_event_masks (GstPad * pad)
{
static const GstEventMask masks[] = {
{GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
{GST_EVENT_NAVIGATION, GST_EVENT_FLAG_NONE},
{0,}
};
return masks;
}
#endif
static gboolean
index_seek (GstPad * pad, GstEvent * event)
{
GstIndexEntry *entry;
GstMpeg2dec *mpeg2dec;
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType cur_type, stop_type;
gint64 cur, stop;
mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
gst_event_parse_seek (event, &rate, &format, &flags,
&cur_type, &cur, &stop_type, &stop);
entry = gst_index_get_assoc_entry (mpeg2dec->index, mpeg2dec->index_id,
GST_INDEX_LOOKUP_BEFORE, GST_ASSOCIATION_FLAG_KEY_UNIT, format, cur);
if ((entry) && gst_pad_is_linked (mpeg2dec->sinkpad)) {
const GstFormat *peer_formats, *try_formats;
/* since we know the exact byteoffset of the frame, make sure to seek on bytes first */
const GstFormat try_all_formats[] = {
GST_FORMAT_BYTES,
GST_FORMAT_TIME,
0
};
try_formats = try_all_formats;
#if 0
peer_formats = gst_pad_get_formats (GST_PAD_PEER (mpeg2dec->sinkpad));
#else
peer_formats = try_all_formats; /* FIXE ME */
#endif
while (gst_formats_contains (peer_formats, *try_formats)) {
gint64 value;
if (gst_index_entry_assoc_map (entry, *try_formats, &value)) {
GstEvent *seek_event;
GST_DEBUG_OBJECT (mpeg2dec, "index %s %" G_GINT64_FORMAT
" -> %s %" G_GINT64_FORMAT,
gst_format_get_details (format)->nick,
cur, gst_format_get_details (*try_formats)->nick, value);
/* lookup succeeded, create the seek */
seek_event =
gst_event_new_seek (rate, *try_formats, flags, cur_type, value,
stop_type, stop);
/* do the seek */
if (gst_pad_push_event (mpeg2dec->sinkpad, seek_event)) {
/* seek worked, we're done, loop will exit */
#if 0
mpeg2dec->segment_start = GST_EVENT_SEEK_OFFSET (event);
#endif
return TRUE;
}
}
try_formats++;
}
}
return FALSE;
}
static gboolean
normal_seek (GstPad * pad, GstEvent * event)
{
gdouble rate;
GstFormat format, conv;
GstSeekFlags flags;
GstSeekType cur_type, stop_type;
gint64 cur, stop;
gint64 time_cur, bytes_cur;
gint64 time_stop, bytes_stop;
gboolean res;
GstMpeg2dec *mpeg2dec;
GstEvent *peer_event;
mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
GST_DEBUG ("normal seek");
gst_event_parse_seek (event, &rate, &format, &flags,
&cur_type, &cur, &stop_type, &stop);
conv = GST_FORMAT_TIME;
if (!gst_mpeg2dec_src_convert (pad, format, cur, &conv, &time_cur))
goto convert_failed;
if (!gst_mpeg2dec_src_convert (pad, format, stop, &conv, &time_stop))
goto convert_failed;
GST_DEBUG ("seek to time %" GST_TIME_FORMAT "-%" GST_TIME_FORMAT,
GST_TIME_ARGS (time_cur), GST_TIME_ARGS (time_stop));
peer_event = gst_event_new_seek (rate, GST_FORMAT_TIME, flags,
cur_type, time_cur, stop_type, time_stop);
/* try seek on time then */
if ((res = gst_pad_push_event (mpeg2dec->sinkpad, peer_event)))
goto done;
/* else we try to seek on bytes */
conv = GST_FORMAT_BYTES;
if (!gst_mpeg2dec_sink_convert (pad, GST_FORMAT_TIME, time_cur,
&format, &bytes_cur))
goto convert_failed;
if (!gst_mpeg2dec_sink_convert (pad, GST_FORMAT_TIME, time_stop,
&format, &bytes_stop))
goto convert_failed;
/* conversion succeeded, create the seek */
peer_event =
gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
cur_type, bytes_cur, stop_type, bytes_stop);
/* do the seek */
res = gst_pad_push_event (mpeg2dec->sinkpad, peer_event);
done:
return res;
/* ERRORS */
convert_failed:
{
/* probably unsupported seek format */
GST_DEBUG_OBJECT (mpeg2dec,
"failed to convert format %u into GST_FORMAT_TIME", format);
return FALSE;
}
}
static gboolean
gst_mpeg2dec_src_event (GstPad * pad, GstEvent * event)
{
gboolean res;
GstMpeg2dec *mpeg2dec;
mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
if (mpeg2dec->decoder == NULL)
goto no_decoder;
switch (GST_EVENT_TYPE (event)) {
/* the all-formats seek logic */
case GST_EVENT_SEEK:
if (mpeg2dec->index)
res = index_seek (pad, event);
else
res = normal_seek (pad, event);
gst_event_unref (event);
break;
case GST_EVENT_NAVIGATION:
/* Forward a navigation event unchanged */
default:
res = gst_pad_push_event (mpeg2dec->sinkpad, event);
break;
}
return res;
no_decoder:
{
GST_DEBUG_OBJECT (mpeg2dec, "no decoder, cannot handle event");
gst_event_unref (event);
return FALSE;
}
}
static GstStateChangeReturn
gst_mpeg2dec_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
mpeg2_accel (MPEG2_ACCEL_DETECT);
if ((mpeg2dec->decoder = mpeg2_init ()) == NULL)
goto init_failed;
mpeg2dec->info = mpeg2_info (mpeg2dec->decoder);
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_mpeg2dec_reset (mpeg2dec);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_NULL:
if (mpeg2dec->decoder) {
mpeg2_close (mpeg2dec->decoder);
mpeg2dec->decoder = NULL;
mpeg2dec->info = NULL;
}
break;
default:
break;
}
return ret;
/* ERRORS */
init_failed:
{
GST_ELEMENT_ERROR (mpeg2dec, LIBRARY, INIT,
(NULL), ("Failed to initialize libmpeg2 library"));
return GST_STATE_CHANGE_FAILURE;
}
}
static void
gst_mpeg2dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMpeg2dec *src;
g_return_if_fail (GST_IS_MPEG2DEC (object));
src = GST_MPEG2DEC (object);
switch (prop_id) {
default:
break;
}
}
static void
gst_mpeg2dec_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstMpeg2dec *mpeg2dec;
g_return_if_fail (GST_IS_MPEG2DEC (object));
mpeg2dec = GST_MPEG2DEC (object);
switch (prop_id) {
default:
break;
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, "mpeg2dec", GST_RANK_SECONDARY,
GST_TYPE_MPEG2DEC))
return FALSE;
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"mpeg2dec",
"LibMpeg2 decoder", plugin_init, VERSION, "GPL", GST_PACKAGE, GST_ORIGIN);
Reference in a new issue View git blame Copy permalink