gstreamer/ext/schroedinger/gstschrodec.c

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/* Schrodinger
* Copyright (C) 2006 David Schleef <ds@schleef.org>
*
* 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 <gst/gst.h>
#include <gst/base/gstadapter.h>
#include <gst/video/video.h>
#include <gst/video/gstvideodecoder.h>
#include <string.h>
#include <schroedinger/schro.h>
#include <math.h>
#include "gstschroutils.h"
#include <schroedinger/schroparse.h>
GST_DEBUG_CATEGORY_EXTERN (schro_debug);
#define GST_CAT_DEFAULT schro_debug
#define GST_TYPE_SCHRO_DEC \
(gst_schro_dec_get_type())
#define GST_SCHRO_DEC(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SCHRO_DEC,GstSchroDec))
#define GST_SCHRO_DEC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SCHRO_DEC,GstSchroDecClass))
#define GST_IS_SCHRO_DEC(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SCHRO_DEC))
#define GST_IS_SCHRO_DEC_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SCHRO_DEC))
typedef struct _GstSchroDec GstSchroDec;
typedef struct _GstSchroDecClass GstSchroDecClass;
struct _GstSchroDec
{
GstVideoDecoder base_video_decoder;
SchroDecoder *decoder;
gboolean seq_header_buffer_seen;
};
struct _GstSchroDecClass
{
GstVideoDecoderClass base_video_decoder_class;
};
GType gst_schro_dec_get_type (void);
/* GstSchroDec signals and args */
enum
{
LAST_SIGNAL
};
enum
{
ARG_0
};
static void gst_schro_dec_finalize (GObject * object);
static gboolean gst_schro_dec_start (GstVideoDecoder * dec);
static gboolean gst_schro_dec_stop (GstVideoDecoder * dec);
static gboolean gst_schro_dec_reset (GstVideoDecoder * dec, gboolean hard);
static GstFlowReturn gst_schro_dec_parse (GstVideoDecoder *
base_video_decoder, GstVideoCodecFrame * frame, GstAdapter * adapter,
gboolean at_eos);
static GstFlowReturn gst_schro_dec_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame);
static gboolean gst_schro_dec_finish (GstVideoDecoder * base_video_decoder);
static void gst_schrodec_send_tags (GstSchroDec * schro_dec);
static GstStaticPadTemplate gst_schro_dec_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-dirac")
);
static GstStaticPadTemplate gst_schro_dec_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (GST_SCHRO_YUV_LIST))
);
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#define parent_class gst_schro_dec_parent_class
G_DEFINE_TYPE (GstSchroDec, gst_schro_dec, GST_TYPE_VIDEO_DECODER);
static void
gst_schro_dec_class_init (GstSchroDecClass * klass)
{
GObjectClass *gobject_class;
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GstElementClass *element_class;
GstVideoDecoderClass *base_video_decoder_class;
gobject_class = G_OBJECT_CLASS (klass);
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element_class = GST_ELEMENT_CLASS (klass);
base_video_decoder_class = GST_VIDEO_DECODER_CLASS (klass);
gobject_class->finalize = gst_schro_dec_finalize;
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gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_schro_dec_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_schro_dec_sink_template));
gst_element_class_set_details_simple (element_class, "Dirac Decoder",
"Codec/Decoder/Video",
"Decode Dirac streams", "David Schleef <ds@schleef.org>");
base_video_decoder_class->start = GST_DEBUG_FUNCPTR (gst_schro_dec_start);
base_video_decoder_class->stop = GST_DEBUG_FUNCPTR (gst_schro_dec_stop);
base_video_decoder_class->reset = GST_DEBUG_FUNCPTR (gst_schro_dec_reset);
base_video_decoder_class->parse = GST_DEBUG_FUNCPTR (gst_schro_dec_parse);
base_video_decoder_class->handle_frame =
GST_DEBUG_FUNCPTR (gst_schro_dec_handle_frame);
base_video_decoder_class->finish = GST_DEBUG_FUNCPTR (gst_schro_dec_finish);
}
static void
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gst_schro_dec_init (GstSchroDec * schro_dec)
{
GST_DEBUG ("gst_schro_dec_init");
schro_dec->decoder = schro_decoder_new ();
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gst_video_decoder_set_packetized (GST_VIDEO_DECODER (schro_dec), FALSE);
}
static gboolean
gst_schro_dec_start (GstVideoDecoder * dec)
{
return TRUE;
}
static gboolean
gst_schro_dec_stop (GstVideoDecoder * dec)
{
return TRUE;
}
static gboolean
gst_schro_dec_reset (GstVideoDecoder * dec, gboolean hard)
{
GstSchroDec *schro_dec;
schro_dec = GST_SCHRO_DEC (dec);
GST_DEBUG ("reset");
if (schro_dec->decoder) {
schro_decoder_reset (schro_dec->decoder);
}
return TRUE;
}
static void
gst_schro_dec_finalize (GObject * object)
{
GstSchroDec *schro_dec;
g_return_if_fail (GST_IS_SCHRO_DEC (object));
schro_dec = GST_SCHRO_DEC (object);
if (schro_dec->decoder) {
schro_decoder_free (schro_dec->decoder);
schro_dec->decoder = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
parse_sequence_header (GstSchroDec * schro_dec, guint8 * data, int size)
{
SchroVideoFormat video_format;
int ret;
GstVideoCodecState *state = NULL;
int bit_depth;
GstVideoFormat fmt = GST_VIDEO_FORMAT_UNKNOWN;
GST_DEBUG_OBJECT (schro_dec, "parse_sequence_header size=%d", size);
schro_dec->seq_header_buffer_seen = TRUE;
ret = schro_parse_decode_sequence_header (data + 13, size - 13,
&video_format);
if (!ret) {
/* FIXME : Isn't this meant to be a *fatal* error ? */
GST_WARNING ("Failed to get frame rate from sequence header");
goto beach;
}
#if SCHRO_CHECK_VERSION(1,0,11)
bit_depth = schro_video_format_get_bit_depth (&video_format);
#else
bit_depth = 8;
#endif
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if (bit_depth == 8) {
if (video_format.chroma_format == SCHRO_CHROMA_444) {
fmt = GST_VIDEO_FORMAT_AYUV;
} else if (video_format.chroma_format == SCHRO_CHROMA_422) {
fmt = GST_VIDEO_FORMAT_UYVY;
} else if (video_format.chroma_format == SCHRO_CHROMA_420) {
fmt = GST_VIDEO_FORMAT_I420;
}
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#if SCHRO_CHECK_VERSION(1,0,11)
} else if (bit_depth <= 10) {
if (video_format.colour_matrix == SCHRO_COLOUR_MATRIX_REVERSIBLE) {
fmt = GST_VIDEO_FORMAT_ARGB;
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} else {
fmt = GST_VIDEO_FORMAT_v210;
}
} else if (bit_depth <= 16) {
fmt = GST_VIDEO_FORMAT_AYUV64;
} else {
GST_ERROR ("bit depth too large (%d > 16)", bit_depth);
fmt = GST_VIDEO_FORMAT_AYUV64;
#endif
}
state = gst_video_decoder_set_output_state (GST_VIDEO_DECODER (schro_dec),
fmt, video_format.width, video_format.height, NULL);
GST_DEBUG ("Frame dimensions are %d x %d\n", state->info.width,
state->info.height);
state->info.fps_n = video_format.frame_rate_numerator;
state->info.fps_d = video_format.frame_rate_denominator;
GST_DEBUG_OBJECT (schro_dec, "Frame rate is %d/%d", state->info.fps_n,
state->info.fps_d);
state->info.par_n = video_format.aspect_ratio_numerator;
state->info.par_d = video_format.aspect_ratio_denominator;
GST_DEBUG ("Pixel aspect ratio is %d/%d", state->info.par_n,
state->info.par_d);
beach:
if (state)
gst_video_codec_state_unref (state);
gst_schrodec_send_tags (schro_dec);
}
static GstFlowReturn
gst_schro_dec_parse (GstVideoDecoder * base_video_decoder,
GstVideoCodecFrame * frame, GstAdapter * adapter, gboolean at_eos)
{
GstSchroDec *schro_decoder;
unsigned char header[SCHRO_PARSE_HEADER_SIZE];
int next;
int prev;
int parse_code;
int av, loc;
GST_DEBUG_OBJECT (base_video_decoder, "parse");
schro_decoder = GST_SCHRO_DEC (base_video_decoder);
av = gst_adapter_available (adapter);
if (av < SCHRO_PARSE_HEADER_SIZE) {
return GST_VIDEO_DECODER_FLOW_NEED_DATA;
}
GST_DEBUG ("available %d", av);
/* Check for header */
loc =
gst_adapter_masked_scan_uint32 (adapter, 0xffffffff, 0x42424344, 0,
av - 3);
if (G_UNLIKELY (loc == -1)) {
GST_DEBUG_OBJECT (schro_decoder, "No header");
gst_adapter_flush (adapter, av - 3);
return GST_VIDEO_DECODER_FLOW_NEED_DATA;
}
/* Skip data until header */
if (loc > 0)
gst_adapter_flush (adapter, loc);
gst_adapter_copy (adapter, header, 0, SCHRO_PARSE_HEADER_SIZE);
parse_code = header[4];
next = GST_READ_UINT32_BE (header + 5);
prev = GST_READ_UINT32_BE (header + 9);
GST_DEBUG ("%08x %02x %08x %08x",
GST_READ_UINT32_BE (header), parse_code, next, prev);
if (memcmp (header, "BBCD", 4) != 0 ||
(next & 0xf0000000) || (prev & 0xf0000000)) {
gst_adapter_flush (adapter, 1);
return GST_VIDEO_DECODER_FLOW_NEED_DATA;
}
if (SCHRO_PARSE_CODE_IS_END_OF_SEQUENCE (parse_code)) {
if (next != 0 && next != SCHRO_PARSE_HEADER_SIZE) {
GST_WARNING ("next is not 0 or 13 in EOS packet (%d)", next);
}
gst_video_decoder_add_to_frame (base_video_decoder,
SCHRO_PARSE_HEADER_SIZE);
SCHRO_DEBUG ("eos");
return gst_video_decoder_have_frame (base_video_decoder);
}
if (gst_adapter_available (adapter) < next) {
return GST_VIDEO_DECODER_FLOW_NEED_DATA;
}
if (SCHRO_PARSE_CODE_IS_SEQ_HEADER (parse_code)) {
guint8 *data;
data = g_malloc (next);
gst_adapter_copy (adapter, data, 0, next);
parse_sequence_header (schro_decoder, data, next);
GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
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#if 0
if (GST_CLOCK_TIME_IS_VALID (base_video_decoder->last_sink_timestamp)) {
base_video_decoder->current_frame->pts =
base_video_decoder->last_sink_timestamp;
GST_DEBUG ("got timestamp %" G_GINT64_FORMAT,
base_video_decoder->last_sink_timestamp);
} else if (base_video_decoder->last_sink_offset_end != -1) {
GstVideoCodecState *state;
#if 0
/* FIXME perhaps should use this to determine if the granulepos
* is valid */
{
guint64 pt;
int dist_h;
int dist_l;
int dist;
int delay;
guint64 dt;
gint64 granulepos = base_video_decoder->last_sink_offset_end;
pt = ((granulepos >> 22) +
(granulepos & OGG_DIRAC_GRANULE_LOW_MASK)) >> 9;
dist_h = (granulepos >> 22) & 0xff;
dist_l = granulepos & 0xff;
dist = (dist_h << 8) | dist_l;
delay = (granulepos >> 9) & 0x1fff;
dt = pt - delay;
GST_DEBUG ("gp pt %lld dist %d delay %d dt %lld", pt, dist, delay, dt);
}
#endif
state = gst_video_decoder_get_state (base_video_decoder);
base_video_decoder->current_frame->pts =
gst_util_uint64_scale (granulepos_to_frame
(base_video_decoder->last_sink_offset_end), state->fps_d * GST_SECOND,
state->fps_n);
} else {
base_video_decoder->current_frame->pts = -1;
}
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#endif
g_free (data);
}
if (!schro_decoder->seq_header_buffer_seen) {
gst_adapter_flush (adapter, next);
return GST_FLOW_OK;
}
if (SCHRO_PARSE_CODE_IS_PICTURE (parse_code)) {
guint8 tmp[4];
gst_adapter_copy (adapter, tmp, SCHRO_PARSE_HEADER_SIZE, 4);
/* What is the point of this ? BaseVideoDecoder doesn't
* do anything with presentation_frame_number */
frame->presentation_frame_number = GST_READ_UINT32_BE (tmp);
gst_video_decoder_add_to_frame (base_video_decoder, next);
return gst_video_decoder_have_frame (base_video_decoder);
} else {
gst_video_decoder_add_to_frame (base_video_decoder, next);
}
return GST_FLOW_OK;
}
static void
gst_schrodec_send_tags (GstSchroDec * schro_dec)
{
GstTagList *list;
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list = gst_tag_list_new_empty ();
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_VIDEO_CODEC, "Dirac", NULL);
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gst_pad_push_event (GST_VIDEO_DECODER_SRC_PAD (schro_dec),
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gst_event_new_tag ("GstDecoder", list));
}
static GstFlowReturn
gst_schro_dec_process (GstSchroDec * schro_dec, gboolean eos)
{
gboolean go;
GstFlowReturn ret;
ret = GST_FLOW_OK;
go = TRUE;
while (go) {
int it;
it = schro_decoder_autoparse_wait (schro_dec->decoder);
switch (it) {
case SCHRO_DECODER_FIRST_ACCESS_UNIT:
break;
case SCHRO_DECODER_NEED_BITS:
GST_DEBUG ("need bits");
go = 0;
break;
case SCHRO_DECODER_NEED_FRAME:
{
GstBuffer *outbuf;
GstVideoCodecState *state;
SchroFrame *schro_frame;
GST_DEBUG ("need frame");
state =
gst_video_decoder_get_output_state (GST_VIDEO_DECODER (schro_dec));
outbuf =
gst_video_decoder_alloc_output_buffer (GST_VIDEO_DECODER
(schro_dec));
schro_frame =
gst_schro_buffer_wrap (outbuf, GST_VIDEO_INFO_FORMAT (&state->info),
state->info.width, state->info.height);
schro_decoder_add_output_picture (schro_dec->decoder, schro_frame);
gst_video_codec_state_unref (state);
break;
}
case SCHRO_DECODER_OK:
{
SchroFrame *schro_frame;
SchroTag *tag;
GstVideoCodecFrame *frame;
GST_DEBUG ("got frame");
tag = schro_decoder_get_picture_tag (schro_dec->decoder);
schro_frame = schro_decoder_pull (schro_dec->decoder);
frame = tag->value;
if (schro_frame) {
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if ((frame->output_buffer = gst_schro_frame_get_buffer (schro_frame))) {
GstFlowReturn flow_ret;
flow_ret =
gst_video_decoder_finish_frame (GST_VIDEO_DECODER
(schro_dec), frame);
if (flow_ret != GST_FLOW_OK) {
GST_DEBUG ("finish frame returned %d", flow_ret);
return flow_ret;
}
} else {
GST_DEBUG ("skipped frame");
}
schro_frame_unref (schro_frame);
}
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if (tag)
schro_tag_free (tag);
if (!eos) {
go = FALSE;
}
}
break;
case SCHRO_DECODER_EOS:
GST_DEBUG ("eos");
go = FALSE;
break;
case SCHRO_DECODER_ERROR:
go = FALSE;
GST_DEBUG ("codec error");
ret = GST_FLOW_ERROR;
break;
default:
break;
}
}
return ret;
}
GstFlowReturn
gst_schro_dec_handle_frame (GstVideoDecoder * base_video_decoder,
GstVideoCodecFrame * frame)
{
GstSchroDec *schro_dec;
SchroBuffer *input_buffer;
schro_dec = GST_SCHRO_DEC (base_video_decoder);
GST_DEBUG ("handle frame");
input_buffer = gst_schro_wrap_gst_buffer (frame->input_buffer);
frame->input_buffer = NULL;
input_buffer->tag = schro_tag_new (frame, NULL);
schro_decoder_autoparse_push (schro_dec->decoder, input_buffer);
return gst_schro_dec_process (schro_dec, FALSE);
}
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gboolean
gst_schro_dec_finish (GstVideoDecoder * base_video_decoder)
{
GstSchroDec *schro_dec;
schro_dec = GST_SCHRO_DEC (base_video_decoder);
GST_DEBUG ("finish");
schro_decoder_autoparse_push_end_of_sequence (schro_dec->decoder);
return gst_schro_dec_process (schro_dec, TRUE);
}