mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-25 03:01:03 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/sys/vdpau/gstvdpmpegdec.c
Carl-Anton Ingmarsson 2cb7696f86 vdpaumpegdec: follow GstVdpVideoSrcPad changes
2010-05-01 14:46:11 +02:00

1162 lines
32 KiB
C
Raw Blame History

/*
* GStreamer
* Copyright (C) 2009 Carl-Anton Ingmarsson <ca.ingmarsson@gmail.com>
*
* 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.
*/
/**
* SECTION:element-vdpaumpegdec
*
* FIXME:Describe vdpaumpegdec here.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v -m fakesrc ! vdpaumpegdec ! fakesink silent=TRUE
* ]|
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <gst/gst.h>
#include <gst/base/gstbytereader.h>
#include <gst/base/gstbitreader.h>
#include <string.h>
#include "mpegutil.h"
#include "gstvdpvideosrcpad.h"
#include "gstvdpvideobuffer.h"
#include "gstvdpmpegdec.h"
GST_DEBUG_CATEGORY_STATIC (gst_vdp_mpeg_dec_debug);
#define GST_CAT_DEFAULT gst_vdp_mpeg_dec_debug
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_DISPLAY
};
/* the capabilities of the inputs and outputs.
*
* describe the real formats here.
*/
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpeg, mpegversion = (int) [ 1, 2 ], "
"systemstream = (boolean) false, parsed = (boolean) true")
);
#define DEBUG_INIT(bla) \
GST_DEBUG_CATEGORY_INIT (gst_vdp_mpeg_dec_debug, "vdpaumpegdec", 0, "VDPAU powered mpeg decoder");
GST_BOILERPLATE_FULL (GstVdpMpegDec, gst_vdp_mpeg_dec,
GstElement, GST_TYPE_ELEMENT, DEBUG_INIT);
static void gst_vdp_mpeg_dec_init_info (VdpPictureInfoMPEG1Or2 * vdp_info);
typedef struct
{
GstByteReader reader;
GstBuffer *buffer;
guint start;
} GstVdpMpegPacketizer;
static GstBuffer *
gst_vdp_mpeg_packetizer_get_next_packet (GstVdpMpegPacketizer * packetizer)
{
guint offset, size;
GstBuffer *buf;
if (packetizer->start == -1)
return NULL;
if (!gst_byte_reader_set_pos (&packetizer->reader, packetizer->start + 3))
return NULL;
offset = gst_byte_reader_masked_scan_uint32 (&packetizer->reader, 0xffffff00,
0x00000100, 0, gst_byte_reader_get_remaining (&packetizer->reader));
if (offset != -1) {
offset = gst_byte_reader_get_pos (&packetizer->reader) + offset;
size = offset - packetizer->start;
} else
size = gst_byte_reader_get_remaining (&packetizer->reader) + 3;
buf = gst_buffer_create_sub (packetizer->buffer, packetizer->start, size);
packetizer->start = offset;
return buf;
}
static void
gst_vdp_mpeg_packetizer_init (GstVdpMpegPacketizer * packetizer,
GstBuffer * buffer)
{
guint offset;
gst_byte_reader_init_from_buffer (&packetizer->reader, buffer);
packetizer->buffer = buffer;
offset = gst_byte_reader_masked_scan_uint32 (&packetizer->reader, 0xffffff00,
0x00000100, 0, gst_byte_reader_get_remaining (&packetizer->reader));
packetizer->start = offset;
}
static gboolean
gst_vdp_mpeg_dec_set_caps (GstPad * pad, GstCaps * caps)
{
GstVdpMpegDec *mpeg_dec = GST_VDP_MPEG_DEC (gst_pad_get_parent (pad));
GstStructure *structure;
gint width, height;
gint fps_n, fps_d;
gint par_n, par_d;
gboolean interlaced = FALSE;
GstCaps *src_caps;
gboolean res;
const GValue *value;
structure = gst_caps_get_structure (caps, 0);
/* create src_pad caps */
gst_structure_get_int (structure, "width", &width);
gst_structure_get_int (structure, "height", &height);
gst_structure_get_fraction (structure, "framerate", &fps_n, &fps_d);
gst_structure_get_fraction (structure, "pixel-aspect-ratio", &par_n, &par_d);
gst_structure_get_boolean (structure, "interlaced", &interlaced);
src_caps = gst_pad_get_allowed_caps (mpeg_dec->src);
if (!src_caps)
goto error;
if (gst_caps_is_empty (src_caps))
goto error;
gst_caps_truncate (src_caps);
gst_caps_set_simple (src_caps,
"width", G_TYPE_INT, width,
"height", G_TYPE_INT, height,
"framerate", GST_TYPE_FRACTION, fps_n, fps_d,
"pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d,
"interlaced", G_TYPE_BOOLEAN, interlaced, NULL);
gst_pad_fixate_caps (mpeg_dec->src, src_caps);
structure = gst_caps_get_structure (src_caps, 0);
GST_DEBUG_OBJECT (mpeg_dec, "Setting source caps to %" GST_PTR_FORMAT,
src_caps);
res = gst_vdp_video_src_pad_set_caps
(GST_VDP_VIDEO_SRC_PAD (mpeg_dec->src), src_caps);
gst_caps_unref (src_caps);
if (!res)
goto done;
mpeg_dec->width = width;
mpeg_dec->height = height;
mpeg_dec->fps_n = fps_n;
mpeg_dec->fps_d = fps_d;
mpeg_dec->interlaced = interlaced;
structure = gst_caps_get_structure (caps, 0);
/* parse caps to setup decoder */
gst_structure_get_int (structure, "mpegversion", &mpeg_dec->version);
/* Default to MPEG1 until we find otherwise */
mpeg_dec->profile = VDP_DECODER_PROFILE_MPEG1;
value = gst_structure_get_value (structure, "codec_data");
if (value) {
GstBuffer *codec_data, *buf;
GstVdpMpegPacketizer packetizer;
codec_data = gst_value_get_buffer (value);
gst_vdp_mpeg_packetizer_init (&packetizer, codec_data);
if ((buf = gst_vdp_mpeg_packetizer_get_next_packet (&packetizer))) {
MPEGSeqHdr hdr;
guint32 bitrate;
mpeg_util_parse_sequence_hdr (&hdr, buf);
memcpy (&mpeg_dec->vdp_info.intra_quantizer_matrix,
&hdr.intra_quantizer_matrix, 64);
memcpy (&mpeg_dec->vdp_info.non_intra_quantizer_matrix,
&hdr.non_intra_quantizer_matrix, 64);
bitrate = hdr.bitrate;
gst_buffer_unref (buf);
if ((buf = gst_vdp_mpeg_packetizer_get_next_packet (&packetizer))) {
MPEGSeqExtHdr ext;
mpeg_util_parse_sequence_extension (&ext, buf);
if (mpeg_dec->version != 1) {
switch (ext.profile) {
case 5:
mpeg_dec->profile = VDP_DECODER_PROFILE_MPEG2_SIMPLE;
break;
default:
mpeg_dec->profile = VDP_DECODER_PROFILE_MPEG2_MAIN;
break;
}
}
bitrate += (ext.bitrate_ext << 18);
gst_buffer_unref (buf);
}
mpeg_dec->duration =
gst_util_uint64_scale (1, GST_SECOND * mpeg_dec->fps_d,
mpeg_dec->fps_n);
mpeg_dec->byterate = bitrate * 50;
GST_DEBUG ("byterate: %" G_GINT64_FORMAT, mpeg_dec->byterate);
}
}
res = TRUE;
done:
gst_object_unref (mpeg_dec);
return res;
error:
res = FALSE;
goto done;
}
static GstFlowReturn
gst_vdp_mpeg_dec_push_video_buffer (GstVdpMpegDec * mpeg_dec,
GstVdpVideoBuffer * buf)
{
gint64 byterate;
if (GST_BUFFER_TIMESTAMP (buf) == GST_CLOCK_TIME_NONE
&& GST_CLOCK_TIME_IS_VALID (mpeg_dec->next_timestamp)) {
GST_BUFFER_TIMESTAMP (buf) = mpeg_dec->next_timestamp;
} else if (GST_BUFFER_TIMESTAMP (buf) == GST_CLOCK_TIME_NONE) {
GST_BUFFER_TIMESTAMP (buf) = gst_util_uint64_scale (mpeg_dec->frame_nr,
GST_SECOND * mpeg_dec->fps_d, mpeg_dec->fps_n);
}
if (mpeg_dec->seeking) {
GstEvent *event;
event = gst_event_new_new_segment (FALSE,
mpeg_dec->segment.rate, GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (buf),
mpeg_dec->segment.stop, GST_BUFFER_TIMESTAMP (buf));
gst_pad_push_event (mpeg_dec->src, event);
mpeg_dec->seeking = FALSE;
}
mpeg_dec->next_timestamp = GST_BUFFER_TIMESTAMP (buf) +
GST_BUFFER_DURATION (buf);
gst_segment_set_last_stop (&mpeg_dec->segment, GST_FORMAT_TIME,
GST_BUFFER_TIMESTAMP (buf));
mpeg_dec->accumulated_duration += GST_BUFFER_DURATION (buf);
mpeg_dec->accumulated_size += GST_BUFFER_SIZE (buf);
if (mpeg_dec->accumulated_duration && mpeg_dec->accumulated_size != 0) {
byterate = gst_util_uint64_scale (mpeg_dec->accumulated_size, GST_SECOND,
mpeg_dec->accumulated_duration);
GST_DEBUG ("byterate: %" G_GINT64_FORMAT, mpeg_dec->byterate);
mpeg_dec->byterate = (mpeg_dec->byterate + byterate) / 2;
}
GST_DEBUG_OBJECT (mpeg_dec,
"Pushing buffer with timestamp: %" GST_TIME_FORMAT
" frame_nr: %" G_GINT64_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_BUFFER_OFFSET (buf));
return gst_vdp_video_src_pad_push ((GstVdpVideoSrcPad *) mpeg_dec->src, buf);
}
static GstFlowReturn
gst_vdp_mpeg_dec_alloc_buffer (GstVdpMpegDec * mpeg_dec,
GstVdpVideoBuffer ** outbuf)
{
GstVdpVideoSrcPad *vdp_pad;
GstFlowReturn ret = GST_FLOW_OK;
vdp_pad = (GstVdpVideoSrcPad *) mpeg_dec->src;
ret = gst_vdp_video_src_pad_alloc_buffer (vdp_pad, outbuf);
if (ret != GST_FLOW_OK)
return ret;
if (mpeg_dec->decoder == VDP_INVALID_HANDLE) {
GstVdpDevice *device;
VdpStatus status;
device = GST_VDP_VIDEO_BUFFER (*outbuf)->device;
status = device->vdp_decoder_create (device->device, mpeg_dec->profile,
mpeg_dec->width, mpeg_dec->height, 2, &mpeg_dec->decoder);
if (status != VDP_STATUS_OK) {
GST_ELEMENT_ERROR (mpeg_dec, RESOURCE, READ,
("Could not create vdpau decoder"),
("Error returned from vdpau was: %s",
device->vdp_get_error_string (status)));
gst_buffer_unref (GST_BUFFER_CAST (*outbuf));
return GST_FLOW_ERROR;
}
}
return GST_FLOW_OK;
}
static GstFlowReturn
gst_vdp_mpeg_dec_decode (GstVdpMpegDec * mpeg_dec,
GstClockTime timestamp, gint64 size)
{
VdpPictureInfoMPEG1Or2 *info;
GstBuffer *buffer;
GstVdpVideoBuffer *outbuf;
VdpVideoSurface surface;
GstVdpDevice *device;
VdpBitstreamBuffer vbit[1];
VdpStatus status;
info = &mpeg_dec->vdp_info;
if (info->picture_coding_type != B_FRAME) {
if (info->backward_reference != VDP_INVALID_HANDLE) {
gst_buffer_ref (GST_BUFFER_CAST (mpeg_dec->b_buffer));
gst_vdp_mpeg_dec_push_video_buffer (mpeg_dec, mpeg_dec->b_buffer);
}
if (info->forward_reference != VDP_INVALID_HANDLE) {
gst_buffer_unref (GST_BUFFER_CAST (mpeg_dec->f_buffer));
info->forward_reference = VDP_INVALID_HANDLE;
}
info->forward_reference = info->backward_reference;
mpeg_dec->f_buffer = mpeg_dec->b_buffer;
info->backward_reference = VDP_INVALID_HANDLE;
}
if (gst_vdp_mpeg_dec_alloc_buffer (mpeg_dec, &outbuf) != GST_FLOW_OK) {
gst_adapter_clear (mpeg_dec->adapter);
return GST_FLOW_ERROR;
}
device = GST_VDP_VIDEO_BUFFER (outbuf)->device;
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
GST_BUFFER_DURATION (outbuf) = mpeg_dec->duration;
GST_BUFFER_OFFSET (outbuf) = mpeg_dec->frame_nr;
GST_BUFFER_SIZE (outbuf) = size;
if (info->picture_coding_type == I_FRAME)
GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
else
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
if (info->top_field_first)
GST_BUFFER_FLAG_SET (outbuf, GST_VIDEO_BUFFER_TFF);
else
GST_BUFFER_FLAG_UNSET (outbuf, GST_VIDEO_BUFFER_TFF);
buffer = gst_adapter_take_buffer (mpeg_dec->adapter,
gst_adapter_available (mpeg_dec->adapter));
surface = GST_VDP_VIDEO_BUFFER (outbuf)->surface;
vbit[0].struct_version = VDP_BITSTREAM_BUFFER_VERSION;
vbit[0].bitstream = GST_BUFFER_DATA (buffer);
vbit[0].bitstream_bytes = GST_BUFFER_SIZE (buffer);
status = device->vdp_decoder_render (mpeg_dec->decoder, surface,
(VdpPictureInfo *) info, 1, vbit);
gst_buffer_unref (buffer);
info->slice_count = 0;
if (status != VDP_STATUS_OK) {
GST_ELEMENT_ERROR (mpeg_dec, RESOURCE, READ,
("Could not decode"),
("Error returned from vdpau was: %s",
device->vdp_get_error_string (status)));
gst_buffer_unref (GST_BUFFER_CAST (outbuf));
return GST_FLOW_ERROR;
}
if (info->picture_coding_type == B_FRAME) {
gst_vdp_mpeg_dec_push_video_buffer (mpeg_dec, outbuf);
} else {
info->backward_reference = surface;
mpeg_dec->b_buffer = outbuf;
}
return GST_FLOW_OK;
}
static gboolean
gst_vdp_mpeg_dec_parse_picture_coding (GstVdpMpegDec * mpeg_dec,
GstBuffer * buffer)
{
MPEGPictureExt pic_ext;
VdpPictureInfoMPEG1Or2 *info;
gint fields;
info = &mpeg_dec->vdp_info;
if (!mpeg_util_parse_picture_coding_extension (&pic_ext, buffer))
return FALSE;
memcpy (&mpeg_dec->vdp_info.f_code, &pic_ext.f_code, 4);
info->intra_dc_precision = pic_ext.intra_dc_precision;
info->picture_structure = pic_ext.picture_structure;
info->top_field_first = pic_ext.top_field_first;
info->frame_pred_frame_dct = pic_ext.frame_pred_frame_dct;
info->concealment_motion_vectors = pic_ext.concealment_motion_vectors;
info->q_scale_type = pic_ext.q_scale_type;
info->intra_vlc_format = pic_ext.intra_vlc_format;
info->alternate_scan = pic_ext.alternate_scan;
fields = 2;
if (pic_ext.picture_structure == 3) {
if (mpeg_dec->interlaced) {
if (pic_ext.progressive_frame == 0)
fields = 2;
if (pic_ext.progressive_frame == 0 && pic_ext.repeat_first_field == 0)
fields = 2;
if (pic_ext.progressive_frame == 1 && pic_ext.repeat_first_field == 1)
fields = 3;
} else {
if (pic_ext.repeat_first_field == 0)
fields = 2;
if (pic_ext.repeat_first_field == 1 && pic_ext.top_field_first == 0)
fields = 4;
if (pic_ext.repeat_first_field == 1 && pic_ext.top_field_first == 1)
fields = 6;
}
} else
fields = 1;
GST_DEBUG ("fields: %d", fields);
mpeg_dec->duration = gst_util_uint64_scale (fields,
GST_SECOND * mpeg_dec->fps_d, 2 * mpeg_dec->fps_n);
return TRUE;
}
static gboolean
gst_vdp_mpeg_dec_parse_sequence (GstVdpMpegDec * mpeg_dec, GstBuffer * buffer)
{
MPEGSeqHdr hdr;
if (!mpeg_util_parse_sequence_hdr (&hdr, buffer))
return FALSE;
memcpy (&mpeg_dec->vdp_info.intra_quantizer_matrix,
&hdr.intra_quantizer_matrix, 64);
memcpy (&mpeg_dec->vdp_info.non_intra_quantizer_matrix,
&hdr.non_intra_quantizer_matrix, 64);
if (mpeg_dec->state == GST_VDP_MPEG_DEC_NEED_SEQUENCE)
mpeg_dec->state = GST_VDP_MPEG_DEC_NEED_DATA;
return TRUE;
}
static gboolean
gst_vdp_mpeg_dec_parse_picture (GstVdpMpegDec * mpeg_dec, GstBuffer * buffer)
{
MPEGPictureHdr pic_hdr;
if (!mpeg_util_parse_picture_hdr (&pic_hdr, buffer))
return FALSE;
if (pic_hdr.pic_type != I_FRAME
&& mpeg_dec->vdp_info.backward_reference == VDP_INVALID_HANDLE) {
GST_DEBUG_OBJECT (mpeg_dec,
"Drop frame since we haven't got an I_FRAME yet");
return FALSE;
}
if (pic_hdr.pic_type == B_FRAME
&& mpeg_dec->vdp_info.forward_reference == VDP_INVALID_HANDLE) {
GST_DEBUG_OBJECT (mpeg_dec,
"Drop frame since we haven't got two non B_FRAMES yet");
return FALSE;
}
mpeg_dec->vdp_info.picture_coding_type = pic_hdr.pic_type;
if (mpeg_dec->version == 1) {
mpeg_dec->vdp_info.full_pel_forward_vector =
pic_hdr.full_pel_forward_vector;
mpeg_dec->vdp_info.full_pel_backward_vector =
pic_hdr.full_pel_backward_vector;
memcpy (&mpeg_dec->vdp_info.f_code, &pic_hdr.f_code, 4);
}
mpeg_dec->frame_nr = mpeg_dec->gop_frame + pic_hdr.tsn;
return TRUE;
}
static gboolean
gst_vdp_mpeg_dec_parse_gop (GstVdpMpegDec * mpeg_dec, GstBuffer * buffer)
{
MPEGGop gop;
GstClockTime time;
if (!mpeg_util_parse_gop (&gop, buffer))
return FALSE;
time = GST_SECOND * (gop.hour * 3600 + gop.minute * 60 + gop.second);
GST_DEBUG ("gop timestamp: %" GST_TIME_FORMAT, GST_TIME_ARGS (time));
mpeg_dec->gop_frame =
gst_util_uint64_scale (time, mpeg_dec->fps_n,
mpeg_dec->fps_d * GST_SECOND) + gop.frame;
if (mpeg_dec->state == GST_VDP_MPEG_DEC_NEED_GOP)
mpeg_dec->state = GST_VDP_MPEG_DEC_NEED_DATA;
return TRUE;
}
static gboolean
gst_vdp_mpeg_dec_parse_quant_matrix (GstVdpMpegDec * mpeg_dec,
GstBuffer * buffer)
{
MPEGQuantMatrix qm;
if (!mpeg_util_parse_quant_matrix (&qm, buffer))
return FALSE;
memcpy (&mpeg_dec->vdp_info.intra_quantizer_matrix,
&qm.intra_quantizer_matrix, 64);
memcpy (&mpeg_dec->vdp_info.non_intra_quantizer_matrix,
&qm.non_intra_quantizer_matrix, 64);
return TRUE;
}
static void
gst_vdp_mpeg_dec_flush (GstVdpMpegDec * mpeg_dec)
{
if (mpeg_dec->vdp_info.forward_reference != VDP_INVALID_HANDLE)
gst_buffer_unref (GST_BUFFER_CAST (mpeg_dec->f_buffer));
if (mpeg_dec->vdp_info.backward_reference != VDP_INVALID_HANDLE)
gst_buffer_unref (GST_BUFFER_CAST (mpeg_dec->b_buffer));
gst_adapter_clear (mpeg_dec->adapter);
gst_vdp_mpeg_dec_init_info (&mpeg_dec->vdp_info);
mpeg_dec->next_timestamp = GST_CLOCK_TIME_NONE;
}
static void
gst_vdp_mpeg_dec_start (GstVdpMpegDec * mpeg_dec)
{
gst_vdp_mpeg_dec_init_info (&mpeg_dec->vdp_info);
mpeg_dec->decoder = VDP_INVALID_HANDLE;
mpeg_dec->state = GST_VDP_MPEG_DEC_NEED_SEQUENCE;
gst_segment_init (&mpeg_dec->segment, GST_FORMAT_TIME);
mpeg_dec->seeking = FALSE;
mpeg_dec->accumulated_size = 0;
mpeg_dec->accumulated_duration = 0;
}
static void
gst_vdp_mpeg_dec_stop (GstVdpMpegDec * mpeg_dec)
{
GstVdpDevice *device;
if ((device =
gst_vdp_video_src_pad_get_device (GST_VDP_VIDEO_SRC_PAD
(mpeg_dec->src)))) {
if (mpeg_dec->decoder != VDP_INVALID_HANDLE)
device->vdp_decoder_destroy (mpeg_dec->decoder);
}
if (mpeg_dec->vdp_info.forward_reference != VDP_INVALID_HANDLE)
mpeg_dec->vdp_info.forward_reference = VDP_INVALID_HANDLE;
if (mpeg_dec->vdp_info.backward_reference != VDP_INVALID_HANDLE)
mpeg_dec->vdp_info.backward_reference = VDP_INVALID_HANDLE;
gst_adapter_clear (mpeg_dec->adapter);
}
static GstFlowReturn
gst_vdp_mpeg_dec_chain (GstPad * pad, GstBuffer * buffer)
{
GstVdpMpegDec *mpeg_dec = GST_VDP_MPEG_DEC (gst_pad_get_parent (pad));
GstVdpMpegPacketizer packetizer;
GstBuffer *buf;
GstFlowReturn ret = GST_FLOW_OK;
if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
GST_DEBUG_OBJECT (mpeg_dec, "Received discont buffer");
gst_vdp_mpeg_dec_flush (mpeg_dec);
}
gst_vdp_mpeg_packetizer_init (&packetizer, buffer);
while ((buf = gst_vdp_mpeg_packetizer_get_next_packet (&packetizer))) {
GstBitReader b_reader = GST_BIT_READER_INIT_FROM_BUFFER (buf);
guint32 sync_code;
guint8 start_code;
/* skip sync_code */
gst_bit_reader_get_bits_uint32 (&b_reader, &sync_code, 8 * 3);
/* start_code */
gst_bit_reader_get_bits_uint8 (&b_reader, &start_code, 8);
if (start_code >= MPEG_PACKET_SLICE_MIN
&& start_code <= MPEG_PACKET_SLICE_MAX) {
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_SLICE");
gst_buffer_ref (buf);
gst_adapter_push (mpeg_dec->adapter, buf);
mpeg_dec->vdp_info.slice_count++;
}
switch (start_code) {
case MPEG_PACKET_PICTURE:
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_PICTURE");
if (!gst_vdp_mpeg_dec_parse_picture (mpeg_dec, buf))
goto done;
break;
case MPEG_PACKET_SEQUENCE:
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_SEQUENCE");
gst_vdp_mpeg_dec_parse_sequence (mpeg_dec, buf);
break;
case MPEG_PACKET_EXTENSION:
{
guint8 ext_code;
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_EXTENSION");
/* ext_code */
gst_bit_reader_get_bits_uint8 (&b_reader, &ext_code, 4);
switch (ext_code) {
case MPEG_PACKET_EXT_PICTURE_CODING:
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_EXT_PICTURE_CODING");
gst_vdp_mpeg_dec_parse_picture_coding (mpeg_dec, buf);
break;
case MPEG_PACKET_EXT_QUANT_MATRIX:
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_EXT_QUANT_MATRIX");
gst_vdp_mpeg_dec_parse_quant_matrix (mpeg_dec, buf);
break;
default:
break;
}
break;
}
case MPEG_PACKET_GOP:
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_GOP");
gst_vdp_mpeg_dec_parse_gop (mpeg_dec, buf);
break;
default:
break;
}
gst_buffer_unref (buf);
}
if (mpeg_dec->state == GST_VDP_MPEG_DEC_NEED_SEQUENCE ||
mpeg_dec->state == GST_VDP_MPEG_DEC_NEED_GOP) {
gst_adapter_clear (mpeg_dec->adapter);
goto done;
}
if (mpeg_dec->vdp_info.slice_count > 0)
ret = gst_vdp_mpeg_dec_decode (mpeg_dec, GST_BUFFER_TIMESTAMP (buffer),
GST_BUFFER_SIZE (buffer));
done:
gst_object_unref (mpeg_dec);
return ret;
}
static gboolean
gst_vdp_mpeg_dec_convert (GstVdpMpegDec * mpeg_dec,
GstFormat src_format, gint64 src_value,
GstFormat dest_format, gint64 * dest_value)
{
if (src_format == dest_format) {
*dest_value = src_value;
return TRUE;
}
if (mpeg_dec->byterate == -1)
return FALSE;
if (src_format == GST_FORMAT_BYTES && dest_format == GST_FORMAT_TIME) {
*dest_value = gst_util_uint64_scale (GST_SECOND, src_value,
mpeg_dec->byterate);
return TRUE;
}
if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
*dest_value =
gst_util_uint64_scale_int (src_value, mpeg_dec->byterate, GST_SECOND);
return TRUE;
}
return FALSE;
}
static const GstQueryType *
gst_mpeg_dec_get_querytypes (GstPad * pad)
{
static const GstQueryType list[] = {
GST_QUERY_POSITION,
GST_QUERY_DURATION,
0
};
return list;
}
static gboolean
gst_vdp_mpeg_dec_src_query (GstPad * pad, GstQuery * query)
{
GstVdpMpegDec *mpeg_dec = GST_VDP_MPEG_DEC (gst_pad_get_parent (pad));
gboolean res;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
{
GstFormat format;
if ((res = gst_pad_query_default (pad, query)))
goto done;
gst_query_parse_position (query, &format, NULL);
if (format == GST_FORMAT_TIME &&
GST_CLOCK_TIME_IS_VALID (mpeg_dec->next_timestamp)) {
gst_query_set_position (query, GST_FORMAT_TIME,
mpeg_dec->next_timestamp);
res = TRUE;
}
break;
}
case GST_QUERY_DURATION:
{
GstFormat format;
if ((res = gst_pad_query_default (pad, query)))
goto done;
gst_query_parse_duration (query, &format, NULL);
if (format == GST_FORMAT_TIME) {
gint64 bytes;
format = GST_FORMAT_BYTES;
if (gst_pad_query_duration (pad, &format, &bytes)
&& format == GST_FORMAT_BYTES) {
gint64 duration;
if (gst_vdp_mpeg_dec_convert (mpeg_dec, GST_FORMAT_BYTES,
bytes, GST_FORMAT_TIME, &duration)) {
GST_DEBUG ("duration: %" GST_TIME_FORMAT, GST_TIME_ARGS (duration));
gst_query_set_duration (query, GST_FORMAT_TIME, duration);
res = TRUE;
}
}
}
break;
}
default:
res = gst_pad_query_default (pad, query);
}
done:
gst_object_unref (mpeg_dec);
return res;
}
static gboolean
normal_seek (GstVdpMpegDec * mpeg_dec, GstEvent * event)
{
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType cur_type, stop_type;
gint64 time_cur, bytes_cur;
gint64 time_stop, bytes_stop;
gboolean res;
gboolean update;
GstEvent *peer_event;
GST_DEBUG ("normal seek");
gst_event_parse_seek (event, &rate, &format, &flags,
&cur_type, &time_cur, &stop_type, &time_stop);
if (format != GST_FORMAT_TIME)
return FALSE;
gst_segment_set_seek (&mpeg_dec->segment, rate, GST_FORMAT_TIME, flags,
cur_type, time_cur, stop_type, time_stop, &update);
if (update) {
/* seek on bytes */
if (!gst_vdp_mpeg_dec_convert (mpeg_dec, GST_FORMAT_TIME, time_cur,
GST_FORMAT_BYTES, &bytes_cur))
goto convert_failed;
if (!gst_vdp_mpeg_dec_convert (mpeg_dec, GST_FORMAT_TIME, time_stop,
GST_FORMAT_BYTES, &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);
g_mutex_lock (mpeg_dec->mutex);
/* do the seek */
res = gst_pad_push_event (mpeg_dec->sink, peer_event);
if (res) {
mpeg_dec->state = GST_VDP_MPEG_DEC_NEED_GOP;
mpeg_dec->seeking = TRUE;
}
g_mutex_unlock (mpeg_dec->mutex);
} else {
GstEvent *event;
/* send segment with new rate */
event = gst_event_new_new_segment (TRUE,
mpeg_dec->segment.rate, GST_FORMAT_TIME, mpeg_dec->segment.start,
mpeg_dec->segment.stop, mpeg_dec->segment.time);
gst_pad_push_event (mpeg_dec->src, event);
res = TRUE;
}
return res;
/* ERRORS */
convert_failed:
{
/* probably unsupported seek format */
GST_DEBUG_OBJECT (mpeg_dec,
"failed to convert format %u into GST_FORMAT_TIME", format);
return FALSE;
}
}
static gboolean
gst_vdp_mpeg_dec_src_event (GstPad * pad, GstEvent * event)
{
GstVdpMpegDec *mpeg_dec = GST_VDP_MPEG_DEC (gst_pad_get_parent (pad));
gboolean res;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
if ((res = gst_pad_event_default (pad, event)))
goto done;
res = normal_seek (mpeg_dec, event);
break;
}
default:
res = gst_pad_event_default (pad, event);
}
done:
gst_object_unref (mpeg_dec);
return res;
}
static gboolean
gst_vdp_mpeg_dec_sink_event (GstPad * pad, GstEvent * event)
{
GstVdpMpegDec *mpeg_dec = GST_VDP_MPEG_DEC (gst_pad_get_parent (pad));
gboolean res;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
{
GST_DEBUG_OBJECT (mpeg_dec, "flush stop");
gst_vdp_mpeg_dec_flush (mpeg_dec);
res = gst_pad_push_event (mpeg_dec->src, event);
break;
}
case GST_EVENT_NEWSEGMENT:
{
gboolean update;
gdouble rate;
GstFormat format;
gint64 start;
gint64 stop;
gint64 position;
gst_event_parse_new_segment (event, &update, &rate, &format,
&start, &stop, &position);
if (format != GST_FORMAT_TIME) {
if (!gst_vdp_mpeg_dec_convert (mpeg_dec, format, start,
GST_FORMAT_TIME, &start))
goto convert_error;
if (!gst_vdp_mpeg_dec_convert (mpeg_dec, format, stop,
GST_FORMAT_TIME, &stop))
goto convert_error;
if (!gst_vdp_mpeg_dec_convert (mpeg_dec, format, position,
GST_FORMAT_TIME, &position))
goto convert_error;
gst_event_unref (event);
event = gst_event_new_new_segment (update, rate, GST_FORMAT_TIME, start,
stop, position);
}
g_mutex_lock (mpeg_dec->mutex);
/* if we seek ourselves we don't push out a newsegment now since we
* use the calculated timestamp of the first frame for this */
if (mpeg_dec->seeking) {
gst_event_unref (event);
res = TRUE;
g_mutex_unlock (mpeg_dec->mutex);
goto done;
}
g_mutex_unlock (mpeg_dec->mutex);
GST_DEBUG_OBJECT (mpeg_dec,
"Pushing new segment update %d format %d start %"
GST_TIME_FORMAT " stop %" GST_TIME_FORMAT " position %"
GST_TIME_FORMAT, update, format, GST_TIME_ARGS (start),
GST_TIME_ARGS (stop), GST_TIME_ARGS (position));
convert_error:
res = gst_pad_push_event (mpeg_dec->src, event);
break;
}
default:
res = gst_pad_event_default (pad, event);
}
done:
gst_object_unref (mpeg_dec);
return res;
}
static GstStateChangeReturn
gst_vdp_mpeg_dec_change_state (GstElement * element, GstStateChange transition)
{
GstVdpMpegDec *mpeg_dec;
GstStateChangeReturn ret;
mpeg_dec = GST_VDP_MPEG_DEC (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_vdp_mpeg_dec_start (mpeg_dec);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_vdp_mpeg_dec_stop (mpeg_dec);
break;
default:
break;
}
return ret;
}
/* GObject vmethod implementations */
static void
gst_vdp_mpeg_dec_finalize (GObject * object)
{
GstVdpMpegDec *mpeg_dec = (GstVdpMpegDec *) object;
g_object_unref (mpeg_dec->adapter);
g_mutex_free (mpeg_dec->mutex);
}
static void
gst_vdp_mpeg_dec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstVdpMpegDec *mpeg_dec = (GstVdpMpegDec *) object;
switch (prop_id) {
case PROP_DISPLAY:
g_object_get_property (G_OBJECT (mpeg_dec->src), "display", value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_vdp_mpeg_dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstVdpMpegDec *mpeg_dec = (GstVdpMpegDec *) object;
switch (prop_id) {
case PROP_DISPLAY:
g_object_set_property (G_OBJECT (mpeg_dec->src), "display", value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_vdp_mpeg_dec_base_init (gpointer gclass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
GstCaps *src_caps;
GstPadTemplate *src_template;
gst_element_class_set_details_simple (element_class,
"VDPAU Mpeg Decoder",
"Decoder",
"decode mpeg stream with vdpau",
"Carl-Anton Ingmarsson <ca.ingmarsson@gmail.com>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
src_caps = gst_vdp_video_buffer_get_caps (TRUE, VDP_CHROMA_TYPE_420);
src_template = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
src_caps);
gst_element_class_add_pad_template (element_class, src_template);
}
/* initialize the vdpaumpegdecoder's class */
static void
gst_vdp_mpeg_dec_class_init (GstVdpMpegDecClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->get_property = gst_vdp_mpeg_dec_get_property;
gobject_class->set_property = gst_vdp_mpeg_dec_set_property;
gobject_class->finalize = gst_vdp_mpeg_dec_finalize;
gstelement_class->change_state = gst_vdp_mpeg_dec_change_state;
g_object_class_install_property (gobject_class, PROP_DISPLAY,
g_param_spec_string ("display", "Display", "X Display name",
NULL, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
}
static void
gst_vdp_mpeg_dec_init_info (VdpPictureInfoMPEG1Or2 * vdp_info)
{
vdp_info->forward_reference = VDP_INVALID_HANDLE;
vdp_info->backward_reference = VDP_INVALID_HANDLE;
vdp_info->slice_count = 0;
vdp_info->picture_structure = 3;
vdp_info->picture_coding_type = 0;
vdp_info->intra_dc_precision = 0;
vdp_info->frame_pred_frame_dct = 1;
vdp_info->concealment_motion_vectors = 0;
vdp_info->intra_vlc_format = 0;
vdp_info->alternate_scan = 0;
vdp_info->q_scale_type = 0;
vdp_info->top_field_first = 1;
}
static void
gst_vdp_mpeg_dec_init (GstVdpMpegDec * mpeg_dec, GstVdpMpegDecClass * gclass)
{
GstPadTemplate *src_template;
/* SRC PAD */
src_template =
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (gclass), "src");
mpeg_dec->src = GST_PAD (gst_vdp_video_src_pad_new (src_template, "src"));
gst_pad_set_event_function (mpeg_dec->src,
GST_DEBUG_FUNCPTR (gst_vdp_mpeg_dec_src_event));
gst_pad_set_query_function (mpeg_dec->src,
GST_DEBUG_FUNCPTR (gst_vdp_mpeg_dec_src_query));
gst_pad_set_query_type_function (mpeg_dec->src,
GST_DEBUG_FUNCPTR (gst_mpeg_dec_get_querytypes));
gst_element_add_pad (GST_ELEMENT (mpeg_dec), mpeg_dec->src);
mpeg_dec->sink = gst_pad_new_from_static_template (&sink_template, "sink");
gst_pad_set_setcaps_function (mpeg_dec->sink,
GST_DEBUG_FUNCPTR (gst_vdp_mpeg_dec_set_caps));
gst_pad_set_chain_function (mpeg_dec->sink,
GST_DEBUG_FUNCPTR (gst_vdp_mpeg_dec_chain));
gst_pad_set_event_function (mpeg_dec->sink,
GST_DEBUG_FUNCPTR (gst_vdp_mpeg_dec_sink_event));
gst_element_add_pad (GST_ELEMENT (mpeg_dec), mpeg_dec->sink);
mpeg_dec->adapter = gst_adapter_new ();
mpeg_dec->mutex = g_mutex_new ();
}
Reference in a new issue View git blame Copy permalink