gstreamer/ext/xvid/gstxviddec.c

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/* GStreamer xvid decoder plugin
* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
* (C) 2006 Mark Nauwelaerts <manauw@skynet.be>
*
* 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 <xvid.h>
#include <gst/video/video.h>
#include "gstxviddec.h"
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-xvid, "
"width = (int) [ 0, MAX ], "
"height = (int) [ 0, MAX ], " "framerate = (fraction) [ 0/1, MAX ]; "
"video/mpeg, "
"mpegversion = (int) 4, "
"systemstream = (boolean) FALSE, "
"width = (int) [ 0, MAX ], "
"height = (int) [ 0, MAX ], " "framerate = (fraction) [ 0/1, MAX ]")
);
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ I420, YUY2, YV12, YVYU, UYVY }")
"; " RGB_24_32_STATIC_CAPS (32, 0x00ff0000, 0x0000ff00,
0x000000ff) "; " RGB_24_32_STATIC_CAPS (32, 0xff000000, 0x00ff0000,
0x0000ff00) "; " RGB_24_32_STATIC_CAPS (32, 0x0000ff00, 0x00ff0000,
0xff000000) "; " RGB_24_32_STATIC_CAPS (32, 0x000000ff, 0x0000ff00,
0x00ff0000) "; " RGB_24_32_STATIC_CAPS (24, 0x0000ff, 0x00ff00,
0xff0000) "; " GST_VIDEO_CAPS_RGB_15 "; " GST_VIDEO_CAPS_RGB_16)
);
GST_DEBUG_CATEGORY_STATIC (xviddec_debug);
#define GST_CAT_DEFAULT xviddec_debug
static void gst_xviddec_base_init (GstXvidDecClass * klass);
static void gst_xviddec_class_init (GstXvidDecClass * klass);
static void gst_xviddec_init (GstXvidDec * dec);
static void gst_xviddec_reset (GstXvidDec * dec);
static gboolean gst_xviddec_handle_sink_event (GstPad * pad, GstEvent * event);
static GstFlowReturn gst_xviddec_chain (GstPad * pad, GstBuffer * buf);
static gboolean gst_xviddec_setcaps (GstPad * pad, GstCaps * caps);
static void gst_xviddec_flush_buffers (GstXvidDec * dec, gboolean send);
static GstStateChangeReturn gst_xviddec_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class = NULL;
GType
gst_xviddec_get_type (void)
{
static GType xviddec_type = 0;
if (!xviddec_type) {
static const GTypeInfo xviddec_info = {
sizeof (GstXvidDecClass),
(GBaseInitFunc) gst_xviddec_base_init,
NULL,
(GClassInitFunc) gst_xviddec_class_init,
NULL,
NULL,
sizeof (GstXvidDec),
0,
(GInstanceInitFunc) gst_xviddec_init,
};
xviddec_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstXvidDec", &xviddec_info, 0);
}
return xviddec_type;
}
static void
gst_xviddec_base_init (GstXvidDecClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
gst_element_class_set_metadata (element_class, "XviD video decoder",
"Codec/Decoder/Video",
"XviD decoder based on xvidcore",
"Ronald Bultje <rbultje@ronald.bitfreak.net>");
}
static void
gst_xviddec_class_init (GstXvidDecClass * klass)
{
GstElementClass *gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_peek_parent (klass);
GST_DEBUG_CATEGORY_INIT (xviddec_debug, "xviddec", 0, "XviD decoder");
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_xviddec_change_state);
}
static void
gst_xviddec_init (GstXvidDec * dec)
{
/* create the sink pad */
dec->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
gst_pad_set_chain_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (gst_xviddec_chain));
gst_pad_set_setcaps_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (gst_xviddec_setcaps));
gst_pad_set_event_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (gst_xviddec_handle_sink_event));
gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
/* create the src pad */
dec->srcpad = gst_pad_new_from_static_template (&src_template, "src");
gst_pad_use_fixed_caps (dec->srcpad);
gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
gst_xviddec_reset (dec);
}
static void
gst_xviddec_reset (GstXvidDec * dec)
{
/* size, etc. */
dec->width = dec->height = dec->csp = -1;
dec->fps_n = dec->par_n = -1;
dec->fps_d = dec->par_d = 1;
dec->next_ts = dec->next_dur = GST_CLOCK_TIME_NONE;
dec->outbuf_size = 0;
/* set xvid handle to NULL */
dec->handle = NULL;
/* no delayed timestamp to start with */
dec->have_ts = FALSE;
/* need keyframe to get going */
dec->waiting_for_key = TRUE;
}
static void
gst_xviddec_unset (GstXvidDec * dec)
{
/* release XviD decoder */
xvid_decore (dec->handle, XVID_DEC_DESTROY, NULL, NULL);
dec->handle = NULL;
}
static gboolean
gst_xviddec_handle_sink_event (GstPad * pad, GstEvent * event)
{
GstXvidDec *dec = GST_XVIDDEC (GST_PAD_PARENT (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
gst_xviddec_flush_buffers (dec, TRUE);
break;
case GST_EVENT_FLUSH_STOP:
gst_xviddec_flush_buffers (dec, FALSE);
break;
case GST_EVENT_NEWSEGMENT:
/* don't really mind about the actual segment info,
* but we do need to recover from this possible jump */
/* FIXME, NEWSEGMENT is not a discontinuity. A decoder
* should clip the output to the segment boundaries.
* Also the rate field of the segment can be used to
* optimize the decoding, like skipping B frames when
* playing at double speed.
* The DISCONT flag on buffers should be used to detect
* discontinuities.
*/
dec->waiting_for_key = TRUE;
break;
default:
break;
}
return gst_pad_push_event (dec->srcpad, event);
}
static gboolean
gst_xviddec_setup (GstXvidDec * dec)
{
xvid_dec_create_t xdec;
gint ret;
/* initialise parameters, see xvid documentation */
gst_xvid_init_struct (xdec);
/* let the decoder handle this, don't trust the container */
xdec.width = 0;
xdec.height = 0;
xdec.handle = NULL;
GST_DEBUG_OBJECT (dec, "Initializing xvid decoder with parameters "
"%dx%d@%d", dec->width, dec->height, dec->csp);
if ((ret = xvid_decore (NULL, XVID_DEC_CREATE, &xdec, NULL)) < 0) {
GST_WARNING_OBJECT (dec, "Initializing xvid decoder failed: %s (%d)",
gst_xvid_error (ret), ret);
return FALSE;
}
dec->handle = xdec.handle;
return TRUE;
}
static void
gst_xviddec_add_par (GstStructure * structure,
gint mux_par_n, gint mux_par_d, gint dec_par_n, gint dec_par_d)
{
/* muxer wins if decoder has nothing interesting to offer */
if (dec_par_n == dec_par_d) {
gst_structure_set (structure, "pixel-aspect-ratio", GST_TYPE_FRACTION,
mux_par_n, mux_par_d, NULL);
} else {
gst_structure_set (structure, "pixel-aspect-ratio", GST_TYPE_FRACTION,
dec_par_n, dec_par_d, NULL);
}
}
/* based on the decoder info, if provided, and xviddec info,
construct a caps and send on to src pad */
static gboolean
gst_xviddec_negotiate (GstXvidDec * dec, xvid_dec_stats_t * xstats)
{
gboolean ret;
gint par_width, par_height;
GstCaps *caps;
/* note: setcaps call with no xstats info,
so definitely need to negotiate then */
if (xstats && (xstats->type != XVID_TYPE_VOL
|| (xstats->type == XVID_TYPE_VOL
&& dec->width == xstats->data.vol.width
&& dec->height == xstats->data.vol.height)))
return TRUE;
switch (xstats ? xstats->data.vol.par : XVID_PAR_11_VGA) {
case XVID_PAR_11_VGA:
par_width = par_height = 1;
break;
case XVID_PAR_43_PAL:
case XVID_PAR_43_NTSC:
par_width = 4;
par_height = 3;
break;
case XVID_PAR_169_PAL:
case XVID_PAR_169_NTSC:
par_width = 16;
par_height = 9;
break;
case XVID_PAR_EXT:
default:
par_width = xstats->data.vol.par_width;
par_height = xstats->data.vol.par_height;
}
caps = gst_xvid_csp_to_caps (dec->csp, dec->width, dec->height);
/* can only provide framerate if we received one */
if (dec->fps_n != -1) {
gst_structure_set (gst_caps_get_structure (caps, 0), "framerate",
GST_TYPE_FRACTION, dec->fps_n, dec->fps_d, NULL);
}
gst_xviddec_add_par (gst_caps_get_structure (caps, 0),
dec->par_n, dec->par_d, par_width, par_height);
GST_LOG ("setting caps on source pad: %" GST_PTR_FORMAT, caps);
ret = gst_pad_set_caps (dec->srcpad, caps);
gst_caps_unref (caps);
return ret;
}
static GstFlowReturn
gst_xviddec_chain (GstPad * pad, GstBuffer * buf)
{
GstXvidDec *dec;
GstBuffer *outbuf = NULL;
xvid_dec_frame_t xframe;
xvid_dec_stats_t xstats;
gint ret;
guint8 *data, *dupe = NULL;
guint size;
GstFlowReturn fret;
dec = GST_XVIDDEC (GST_OBJECT_PARENT (pad));
if (!dec->handle)
goto not_negotiated;
fret = GST_FLOW_OK;
GST_LOG_OBJECT (dec, "Received buffer of time %" GST_TIME_FORMAT
" duration %" GST_TIME_FORMAT ", size %d",
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_SIZE (buf));
if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT)) {
/* FIXME: should we do anything here, like flush the decoder? */
}
data = GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf);
/* xvidcore overreads the input buffer, we need to alloc some extra padding
* to make things work reliably */
#define EXTRA_PADDING 16
if (EXTRA_PADDING > 0) {
dupe = g_malloc (size + EXTRA_PADDING);
memcpy (dupe, data, size);
memset (dupe + size, 0, EXTRA_PADDING);
data = dupe;
}
do { /* loop needed because xvidcore may return vol information */
/* decode and so ... */
gst_xvid_init_struct (xframe);
xframe.general = XVID_LOWDELAY;
xframe.bitstream = (void *) data;
xframe.length = size;
gst_xvid_init_struct (xstats);
if (outbuf == NULL) {
fret = gst_pad_alloc_buffer (dec->srcpad, GST_BUFFER_OFFSET_NONE,
dec->outbuf_size, GST_PAD_CAPS (dec->srcpad), &outbuf);
if (fret != GST_FLOW_OK)
goto done;
}
gst_xvid_image_fill (&xframe.output, GST_BUFFER_DATA (outbuf),
dec->csp, dec->width, dec->height);
ret = xvid_decore (dec->handle, XVID_DEC_DECODE, &xframe, &xstats);
if (ret < 0)
goto decode_error;
GST_LOG_OBJECT (dec, "xvid produced output, type %d, consumed %d",
xstats.type, ret);
if (xstats.type == XVID_TYPE_VOL)
gst_xviddec_negotiate (dec, &xstats);
data += ret;
size -= ret;
} while (xstats.type <= 0 && size > 0);
/* 1 byte is frequently left over */
if (size > 1) {
GST_WARNING_OBJECT (dec, "decoder did not consume all input");
}
/* FIXME, reflow the multiple return exit points */
if (xstats.type > 0) { /* some real output was produced */
if (G_UNLIKELY (dec->waiting_for_key)) {
if (xstats.type != XVID_TYPE_IVOP)
goto dropping;
dec->waiting_for_key = FALSE;
}
/* bframes can cause a delay in frames being returned
non keyframe timestamps can permute a bit between
encode and display order, but should match for keyframes */
if (dec->have_ts) {
GST_BUFFER_TIMESTAMP (outbuf) = dec->next_ts;
GST_BUFFER_DURATION (outbuf) = dec->next_dur;
dec->next_ts = GST_BUFFER_TIMESTAMP (buf);
dec->next_dur = GST_BUFFER_DURATION (buf);
} else {
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buf);
}
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (dec->srcpad));
GST_LOG_OBJECT (dec, "pushing buffer with pts %" GST_TIME_FORMAT
" duration %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)));
fret = gst_pad_push (dec->srcpad, outbuf);
} else { /* no real output yet, delay in frames being returned */
if (G_UNLIKELY (dec->have_ts)) {
GST_WARNING_OBJECT (dec,
"xvid decoder produced no output, but timestamp %" GST_TIME_FORMAT
" already queued", GST_TIME_ARGS (dec->next_ts));
} else {
dec->have_ts = TRUE;
dec->next_ts = GST_BUFFER_TIMESTAMP (buf);
dec->next_dur = GST_BUFFER_DURATION (buf);
}
gst_buffer_unref (outbuf);
}
done:
g_free (dupe);
gst_buffer_unref (buf);
return fret;
/* ERRORS */
not_negotiated:
{
GST_ELEMENT_ERROR (dec, CORE, NEGOTIATION, (NULL),
("format wasn't negotiated before chain function"));
fret = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
decode_error:
{
/* FIXME: shouldn't error out fatally/properly after N decoding errors? */
GST_ELEMENT_WARNING (dec, STREAM, DECODE, (NULL),
("Error decoding xvid frame: %s (%d)", gst_xvid_error (ret), ret));
if (outbuf)
gst_buffer_unref (outbuf);
goto done;
}
dropping:
{
GST_WARNING_OBJECT (dec, "Dropping non-keyframe (seek/init)");
if (outbuf)
gst_buffer_unref (outbuf);
goto done;
}
}
/* flush xvid encoder buffers caused by bframe usage;
not well tested */
static void
gst_xviddec_flush_buffers (GstXvidDec * dec, gboolean send)
{
#if 0
gint ret;
GstBuffer *outbuf = NULL;
xvid_dec_frame_t xframe;
xvid_dec_stats_t xstats;
#endif
GST_DEBUG_OBJECT (dec, "flushing buffers with send %d, have_ts %d",
send, dec->have_ts);
/* no need to flush if there is no delayed time-stamp */
if (!dec->have_ts)
return;
/* flushing must reset the timestamp keeping */
dec->have_ts = FALSE;
/* also no need to flush if no handle */
if (!dec->handle)
return;
/* unlike encoder, decoder does not seem to like flushing, disable for now */
#if 0
gst_xvid_init_struct (xframe);
gst_xvid_init_struct (xstats);
/* init a fake frame to force flushing */
xframe.bitstream = NULL;
xframe.length = -1;
ret = gst_xviddec_decode (dec, xframe, &outbuf, &xstats);
GST_DEBUG_OBJECT (dec, "received frame when flushing, type %d, size %d",
xstats.type, ret);
if (ret > 0 && send) {
/* we have some valid return frame, give it the delayed timestamp and send */
GST_BUFFER_TIMESTAMP (outbuf) = dec->next_ts;
GST_BUFFER_DURATION (outbuf) = dec->next_dur;
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (dec->srcpad));
gst_pad_push (dec->srcpad, outbuf);
return;
}
if (outbuf)
gst_buffer_unref (outbuf);
#else
return;
#endif
}
#if 0
static GstCaps *
gst_xviddec_src_getcaps (GstPad * pad)
{
GstXvidDec *dec = GST_XVIDDEC (GST_PAD_PARENT (pad));
GstCaps *caps;
gint csp[] = {
XVID_CSP_I420,
XVID_CSP_YV12,
XVID_CSP_YUY2,
XVID_CSP_UYVY,
XVID_CSP_YVYU,
XVID_CSP_BGRA,
XVID_CSP_ABGR,
XVID_CSP_RGBA,
#ifdef XVID_CSP_ARGB
XVID_CSP_ARGB,
#endif
XVID_CSP_BGR,
XVID_CSP_RGB555,
XVID_CSP_RGB565,
0
}, i;
if (!GST_PAD_CAPS (dec->sinkpad)) {
GstPadTemplate *templ = gst_static_pad_template_get (&src_template);
return gst_caps_copy (gst_pad_template_get_caps (templ));
}
caps = gst_caps_new_empty ();
for (i = 0; csp[i] != 0; i++) {
GstCaps *one = gst_xvid_csp_to_caps (csp[i], dec->width,
dec->height, dec->fps, dec->par);
gst_caps_append (caps, one);
}
return caps;
}
#endif
static gboolean
gst_xviddec_setcaps (GstPad * pad, GstCaps * caps)
{
GstXvidDec *dec = GST_XVIDDEC (GST_PAD_PARENT (pad));
GstStructure *structure;
GstCaps *allowed_caps;
const GValue *val;
GST_LOG_OBJECT (dec, "caps %" GST_PTR_FORMAT, caps);
/* if there's something old around, remove it */
if (dec->handle) {
gst_xviddec_unset (dec);
}
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "width", &dec->width);
gst_structure_get_int (structure, "height", &dec->height);
/* perhaps some fps info */
val = gst_structure_get_value (structure, "framerate");
if ((val != NULL) && GST_VALUE_HOLDS_FRACTION (val)) {
dec->fps_n = gst_value_get_fraction_numerator (val);
dec->fps_d = gst_value_get_fraction_denominator (val);
} else {
dec->fps_n = -1;
dec->fps_d = 1;
}
/* perhaps some par info */
val = gst_structure_get_value (structure, "pixel-aspect-ratio");
if (val != NULL && GST_VALUE_HOLDS_FRACTION (val)) {
dec->par_n = gst_value_get_fraction_numerator (val);
dec->par_d = gst_value_get_fraction_denominator (val);
} else {
dec->par_n = 1;
dec->par_d = 1;
}
/* we try to find the preferred/accept csp */
allowed_caps = gst_pad_get_allowed_caps (dec->srcpad);
if (!allowed_caps) {
GST_DEBUG_OBJECT (dec, "... but no peer, using template caps");
/* need to copy because get_allowed_caps returns a ref,
and get_pad_template_caps doesn't */
allowed_caps = gst_caps_copy (gst_pad_get_pad_template_caps (dec->srcpad));
}
GST_LOG_OBJECT (dec, "allowed source caps %" GST_PTR_FORMAT, allowed_caps);
/* pick the first one ... */
structure = gst_caps_get_structure (allowed_caps, 0);
val = gst_structure_get_value (structure, "format");
if (val != NULL && G_VALUE_TYPE (val) == GST_TYPE_LIST) {
GValue temp = { 0, };
gst_value_init_and_copy (&temp, gst_value_list_get_value (val, 0));
gst_structure_set_value (structure, "format", &temp);
g_value_unset (&temp);
}
/* ... and use its info to get the csp */
dec->csp = gst_xvid_structure_to_csp (structure);
if (dec->csp == -1) {
GST_WARNING_OBJECT (dec, "failed to decide on colorspace, using I420");
dec->csp = XVID_CSP_I420;
}
dec->outbuf_size =
gst_xvid_image_get_size (dec->csp, dec->width, dec->height);
GST_LOG_OBJECT (dec, "csp=%d, outbuf_size=%d", dec->csp, dec->outbuf_size);
gst_caps_unref (allowed_caps);
/* now set up xvid ... */
if (!gst_xviddec_setup (dec)) {
GST_ELEMENT_ERROR (GST_ELEMENT (dec), LIBRARY, INIT, (NULL), (NULL));
return FALSE;
}
return gst_xviddec_negotiate (dec, NULL);
}
static GstStateChangeReturn
gst_xviddec_change_state (GstElement * element, GstStateChange transition)
{
GstXvidDec *dec = GST_XVIDDEC (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_xvid_init ())
return GST_STATE_CHANGE_FAILURE;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
goto done;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_xviddec_flush_buffers (dec, FALSE);
if (dec->handle) {
gst_xviddec_unset (dec);
}
gst_xviddec_reset (dec);
break;
default:
break;
}
done:
return ret;
}