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gstreamer/gst/flx/gstflxdec.c
Stéphane Cerveau 26d37fb491 flx: allow per feature registration 
Split plugin into features including
dynamic types which can be indiviually
registered during a static build.

More details here:

https://gitlab.freedesktop.org/gstreamer/gst-build/-/merge_requests/199
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/661

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/876>
2021-03-29 12:45:22 +02:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@temple-baptist.com>
* Copyright (C) <2016> Matthew Waters <matthew@centricular.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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-flxdec
* @title: flxdec
*
* This element decodes fli/flc/flx-video into raw video
*/
/*
* http://www.coolutils.com/Formats/FLI
* http://woodshole.er.usgs.gov/operations/modeling/flc.html
* http://www.compuphase.com/flic.htm
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "flx_fmt.h"
#include "gstflxdec.h"
#include <gst/video/video.h>
#define JIFFIE (GST_SECOND/70)
GST_DEBUG_CATEGORY_STATIC (flxdec_debug);
#define GST_CAT_DEFAULT flxdec_debug
/* input */
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-fli")
);
#if G_BYTE_ORDER == G_BIG_ENDIAN
#define RGB_ORDER "xRGB"
#else
#define RGB_ORDER "BGRx"
#endif
/* output */
static GstStaticPadTemplate src_video_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (RGB_ORDER))
);
static void gst_flxdec_dispose (GstFlxDec * flxdec);
static GstFlowReturn gst_flxdec_chain (GstPad * pad, GstObject * parent,
GstBuffer * buf);
static gboolean gst_flxdec_sink_event_handler (GstPad * pad,
GstObject * parent, GstEvent * event);
static GstStateChangeReturn gst_flxdec_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_flxdec_src_query_handler (GstPad * pad, GstObject * parent,
GstQuery * query);
static gboolean flx_decode_color (GstFlxDec * flxdec, GstByteReader * reader,
GstByteWriter * writer, gint scale);
static gboolean flx_decode_brun (GstFlxDec * flxdec,
GstByteReader * reader, GstByteWriter * writer);
static gboolean flx_decode_delta_fli (GstFlxDec * flxdec,
GstByteReader * reader, GstByteWriter * writer);
static gboolean flx_decode_delta_flc (GstFlxDec * flxdec,
GstByteReader * reader, GstByteWriter * writer);
#define rndalign(off) ((off) + ((off) & 1))
#define gst_flxdec_parent_class parent_class
G_DEFINE_TYPE (GstFlxDec, gst_flxdec, GST_TYPE_ELEMENT);
GST_ELEMENT_REGISTER_DEFINE (flxdec, "flxdec",
GST_RANK_PRIMARY, GST_TYPE_FLXDEC);
static void
gst_flxdec_class_init (GstFlxDecClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->dispose = (GObjectFinalizeFunc) gst_flxdec_dispose;
GST_DEBUG_CATEGORY_INIT (flxdec_debug, "flxdec", 0, "FLX video decoder");
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_flxdec_change_state);
gst_element_class_set_static_metadata (gstelement_class, "FLX video decoder",
"Codec/Decoder/Video",
"FLC/FLI/FLX video decoder",
"Sepp Wijnands <mrrazz@garbage-coderz.net>, Zeeshan Ali <zeenix@gmail.com>");
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&sink_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&src_video_factory));
}
static void
gst_flxdec_init (GstFlxDec * flxdec)
{
flxdec->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
gst_element_add_pad (GST_ELEMENT (flxdec), flxdec->sinkpad);
gst_pad_set_chain_function (flxdec->sinkpad,
GST_DEBUG_FUNCPTR (gst_flxdec_chain));
gst_pad_set_event_function (flxdec->sinkpad,
GST_DEBUG_FUNCPTR (gst_flxdec_sink_event_handler));
flxdec->srcpad = gst_pad_new_from_static_template (&src_video_factory, "src");
gst_element_add_pad (GST_ELEMENT (flxdec), flxdec->srcpad);
gst_pad_set_query_function (flxdec->srcpad,
GST_DEBUG_FUNCPTR (gst_flxdec_src_query_handler));
gst_pad_use_fixed_caps (flxdec->srcpad);
flxdec->adapter = gst_adapter_new ();
}
static void
gst_flxdec_dispose (GstFlxDec * flxdec)
{
if (flxdec->adapter) {
g_object_unref (flxdec->adapter);
flxdec->adapter = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose ((GObject *) flxdec);
}
static gboolean
gst_flxdec_src_query_handler (GstPad * pad, GstObject * parent,
GstQuery * query)
{
GstFlxDec *flxdec = (GstFlxDec *) parent;
gboolean ret = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
{
GstFormat format;
gst_query_parse_duration (query, &format, NULL);
if (format != GST_FORMAT_TIME)
goto done;
gst_query_set_duration (query, format, flxdec->duration);
ret = TRUE;
}
default:
break;
}
done:
if (!ret)
ret = gst_pad_query_default (pad, parent, query);
return ret;
}
static gboolean
gst_flxdec_sink_event_handler (GstPad * pad, GstObject * parent,
GstEvent * event)
{
GstFlxDec *flxdec;
gboolean ret;
flxdec = GST_FLXDEC (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEGMENT:
{
gst_event_copy_segment (event, &flxdec->segment);
if (flxdec->segment.format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (flxdec, "generating TIME segment");
gst_segment_init (&flxdec->segment, GST_FORMAT_TIME);
gst_event_unref (event);
event = gst_event_new_segment (&flxdec->segment);
}
if (gst_pad_has_current_caps (flxdec->srcpad)) {
ret = gst_pad_event_default (pad, parent, event);
} else {
flxdec->need_segment = TRUE;
gst_event_unref (event);
ret = TRUE;
}
break;
}
case GST_EVENT_FLUSH_STOP:
gst_segment_init (&flxdec->segment, GST_FORMAT_UNDEFINED);
ret = gst_pad_event_default (pad, parent, event);
break;
default:
ret = gst_pad_event_default (pad, parent, event);
break;
}
return ret;
}
static gboolean
flx_decode_chunks (GstFlxDec * flxdec, gulong n_chunks, GstByteReader * reader,
GstByteWriter * writer)
{
gboolean ret = TRUE;
while (n_chunks--) {
GstByteReader chunk;
guint32 size;
guint16 type;
if (!gst_byte_reader_get_uint32_le (reader, &size))
goto parse_error;
if (!gst_byte_reader_get_uint16_le (reader, &type))
goto parse_error;
GST_LOG_OBJECT (flxdec, "chunk has type 0x%02x size %d", type, size);
if (!gst_byte_reader_get_sub_reader (reader, &chunk,
size - FlxFrameChunkSize)) {
GST_ERROR_OBJECT (flxdec, "Incorrect size in the chunk header");
goto error;
}
switch (type) {
case FLX_COLOR64:
ret = flx_decode_color (flxdec, &chunk, writer, 2);
break;
case FLX_COLOR256:
ret = flx_decode_color (flxdec, &chunk, writer, 0);
break;
case FLX_BRUN:
ret = flx_decode_brun (flxdec, &chunk, writer);
break;
case FLX_LC:
ret = flx_decode_delta_fli (flxdec, &chunk, writer);
break;
case FLX_SS2:
ret = flx_decode_delta_flc (flxdec, &chunk, writer);
break;
case FLX_BLACK:
ret = gst_byte_writer_fill (writer, 0, flxdec->size);
break;
case FLX_MINI:
break;
default:
GST_WARNING ("Unimplemented chunk type: 0x%02x size: %d - skipping",
type, size);
break;
}
if (!ret)
break;
}
return ret;
parse_error:
GST_ERROR_OBJECT (flxdec, "Failed to decode chunk");
error:
return FALSE;
}
static gboolean
flx_decode_color (GstFlxDec * flxdec, GstByteReader * reader,
GstByteWriter * writer, gint scale)
{
guint8 count, indx;
guint16 packs;
if (!gst_byte_reader_get_uint16_le (reader, &packs))
goto error;
indx = 0;
GST_LOG ("GstFlxDec: cmap packs: %d", (guint) packs);
while (packs--) {
const guint8 *data;
guint16 actual_count;
/* color map index + skip count */
if (!gst_byte_reader_get_uint8 (reader, &indx))
goto error;
/* number of rgb triplets */
if (!gst_byte_reader_get_uint8 (reader, &count))
goto error;
actual_count = count == 0 ? 256 : count;
if (!gst_byte_reader_get_data (reader, count * 3, &data))
goto error;
GST_LOG_OBJECT (flxdec, "cmap count: %d (indx: %d)", actual_count, indx);
flx_set_palette_vector (flxdec->converter, indx, actual_count,
(guchar *) data, scale);
}
return TRUE;
error:
GST_ERROR_OBJECT (flxdec, "Error decoding color palette");
return FALSE;
}
static gboolean
flx_decode_brun (GstFlxDec * flxdec, GstByteReader * reader,
GstByteWriter * writer)
{
gulong lines, row;
g_return_val_if_fail (flxdec != NULL, FALSE);
lines = flxdec->hdr.height;
while (lines--) {
/* packet count.
* should not be used anymore, since the flc format can
* contain more then 255 RLE packets. we use the frame
* width instead.
*/
if (!gst_byte_reader_skip (reader, 1))
goto error;
row = flxdec->hdr.width;
while (row) {
gint8 count;
if (!gst_byte_reader_get_int8 (reader, &count))
goto error;
if (count <= 0) {
const guint8 *data;
/* literal run */
count = ABS (count);
GST_LOG_OBJECT (flxdec, "have literal run of size %d", count);
if (count > row) {
GST_ERROR_OBJECT (flxdec, "Invalid BRUN line detected. "
"bytes to write exceeds the end of the row");
return FALSE;
}
row -= count;
if (!gst_byte_reader_get_data (reader, count, &data))
goto error;
if (!gst_byte_writer_put_data (writer, data, count))
goto error;
} else {
guint8 x;
GST_LOG_OBJECT (flxdec, "have replicate run of size %d", count);
if (count > row) {
GST_ERROR_OBJECT (flxdec, "Invalid BRUN packet detected."
"bytes to write exceeds the end of the row");
return FALSE;
}
/* replicate run */
row -= count;
if (!gst_byte_reader_get_uint8 (reader, &x))
goto error;
if (!gst_byte_writer_fill (writer, x, count))
goto error;
}
}
}
return TRUE;
error:
GST_ERROR_OBJECT (flxdec, "Failed to decode BRUN packet");
return FALSE;
}
static gboolean
flx_decode_delta_fli (GstFlxDec * flxdec, GstByteReader * reader,
GstByteWriter * writer)
{
guint16 start_line, lines;
guint line_start_i;
g_return_val_if_fail (flxdec != NULL, FALSE);
g_return_val_if_fail (flxdec->delta_data != NULL, FALSE);
/* use last frame for delta */
if (!gst_byte_writer_put_data (writer, flxdec->delta_data, flxdec->size))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &start_line))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &lines))
goto error;
GST_LOG_OBJECT (flxdec, "height %d start line %d line count %d",
flxdec->hdr.height, start_line, lines);
if (start_line + lines > flxdec->hdr.height) {
GST_ERROR_OBJECT (flxdec, "Invalid FLI packet detected. too many lines.");
return FALSE;
}
line_start_i = flxdec->hdr.width * start_line;
if (!gst_byte_writer_set_pos (writer, line_start_i))
goto error;
while (lines--) {
guint8 packets;
/* packet count */
if (!gst_byte_reader_get_uint8 (reader, &packets))
goto error;
GST_LOG_OBJECT (flxdec, "have %d packets", packets);
while (packets--) {
/* skip count */
guint8 skip;
gint8 count;
if (!gst_byte_reader_get_uint8 (reader, &skip))
goto error;
/* skip bytes */
if (!gst_byte_writer_set_pos (writer,
gst_byte_writer_get_pos (writer) + skip))
goto error;
/* RLE count */
if (!gst_byte_reader_get_int8 (reader, &count))
goto error;
if (count < 0) {
guint8 x;
/* literal run */
count = ABS (count);
GST_LOG_OBJECT (flxdec, "have literal run of size %d at offset %d",
count, skip);
if (skip + count > flxdec->hdr.width) {
GST_ERROR_OBJECT (flxdec, "Invalid FLI packet detected. "
"line too long.");
return FALSE;
}
if (!gst_byte_reader_get_uint8 (reader, &x))
goto error;
if (!gst_byte_writer_fill (writer, x, count))
goto error;
} else {
const guint8 *data;
GST_LOG_OBJECT (flxdec, "have replicate run of size %d at offset %d",
count, skip);
if (skip + count > flxdec->hdr.width) {
GST_ERROR_OBJECT (flxdec, "Invalid FLI packet detected. "
"line too long.");
return FALSE;
}
/* replicate run */
if (!gst_byte_reader_get_data (reader, count, &data))
goto error;
if (!gst_byte_writer_put_data (writer, data, count))
goto error;
}
}
line_start_i += flxdec->hdr.width;
if (!gst_byte_writer_set_pos (writer, line_start_i))
goto error;
}
return TRUE;
error:
GST_ERROR_OBJECT (flxdec, "Failed to decode FLI packet");
return FALSE;
}
static gboolean
flx_decode_delta_flc (GstFlxDec * flxdec, GstByteReader * reader,
GstByteWriter * writer)
{
guint16 lines, start_l;
g_return_val_if_fail (flxdec != NULL, FALSE);
g_return_val_if_fail (flxdec->delta_data != NULL, FALSE);
/* use last frame for delta */
if (!gst_byte_writer_put_data (writer, flxdec->delta_data, flxdec->size))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &lines))
goto error;
if (lines > flxdec->hdr.height) {
GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. too many lines.");
return FALSE;
}
start_l = lines;
while (lines) {
guint16 opcode;
if (!gst_byte_writer_set_pos (writer,
flxdec->hdr.width * (start_l - lines)))
goto error;
/* process opcode(s) */
while (TRUE) {
if (!gst_byte_reader_get_uint16_le (reader, &opcode))
goto error;
if ((opcode & 0xc000) == 0)
break;
if ((opcode & 0xc000) == 0xc000) {
/* line skip count */
gulong skip = (0x10000 - opcode);
if (skip > flxdec->hdr.height) {
GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. "
"skip line count too big.");
return FALSE;
}
start_l += skip;
if (!gst_byte_writer_set_pos (writer,
gst_byte_writer_get_pos (writer) + flxdec->hdr.width * skip))
goto error;
} else {
/* last pixel */
if (!gst_byte_writer_set_pos (writer,
gst_byte_writer_get_pos (writer) + flxdec->hdr.width))
goto error;
if (!gst_byte_writer_put_uint8 (writer, opcode & 0xff))
goto error;
}
}
/* last opcode is the packet count */
GST_LOG_OBJECT (flxdec, "have %d packets", opcode);
while (opcode--) {
/* skip count */
guint8 skip;
gint8 count;
if (!gst_byte_reader_get_uint8 (reader, &skip))
goto error;
if (!gst_byte_writer_set_pos (writer,
gst_byte_writer_get_pos (writer) + skip))
goto error;
/* RLE count */
if (!gst_byte_reader_get_int8 (reader, &count))
goto error;
if (count < 0) {
guint16 x;
/* replicate word run */
count = ABS (count);
GST_LOG_OBJECT (flxdec, "have replicate run of size %d at offset %d",
count, skip);
if (skip + count > flxdec->hdr.width) {
GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. "
"line too long.");
return FALSE;
}
if (!gst_byte_reader_get_uint16_le (reader, &x))
goto error;
while (count--) {
if (!gst_byte_writer_put_uint16_le (writer, x)) {
goto error;
}
}
} else {
GST_LOG_OBJECT (flxdec, "have literal run of size %d at offset %d",
count, skip);
if (skip + count > flxdec->hdr.width) {
GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. "
"line too long.");
return FALSE;
}
while (count--) {
guint16 x;
if (!gst_byte_reader_get_uint16_le (reader, &x))
goto error;
if (!gst_byte_writer_put_uint16_le (writer, x))
goto error;
}
}
}
lines--;
}
return TRUE;
error:
GST_ERROR_OBJECT (flxdec, "Failed to decode FLI packet");
return FALSE;
}
static gboolean
_read_flx_header (GstFlxDec * flxdec, GstByteReader * reader, FlxHeader * flxh)
{
memset (flxh, 0, sizeof (*flxh));
if (!gst_byte_reader_get_uint32_le (reader, &flxh->size))
goto error;
if (flxh->size < FlxHeaderSize) {
GST_ERROR_OBJECT (flxdec, "Invalid file size in the header");
return FALSE;
}
if (!gst_byte_reader_get_uint16_le (reader, &flxh->type))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->frames))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->width))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->height))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->depth))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->flags))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->speed))
goto error;
if (!gst_byte_reader_skip (reader, 2)) /* reserved */
goto error;
/* FLC */
if (!gst_byte_reader_get_uint32_le (reader, &flxh->created))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->creator))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->updated))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->updater))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->aspect_dx))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->aspect_dy))
goto error;
/* EGI */
if (!gst_byte_reader_get_uint16_le (reader, &flxh->ext_flags))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->keyframes))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->totalframes))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->req_memory))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->max_regions))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->transp_num))
goto error;
if (!gst_byte_reader_skip (reader, 24)) /* reserved */
goto error;
/* FLC */
if (!gst_byte_reader_get_uint32_le (reader, &flxh->oframe1))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->oframe2))
goto error;
if (!gst_byte_reader_skip (reader, 40)) /* reserved */
goto error;
return TRUE;
error:
GST_ERROR_OBJECT (flxdec, "Error reading file header");
return FALSE;
}
static GstFlowReturn
gst_flxdec_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstByteReader reader;
GstBuffer *input;
GstMapInfo map_info;
GstCaps *caps;
guint available;
GstFlowReturn res = GST_FLOW_OK;
GstFlxDec *flxdec;
FlxHeader *flxh;
g_return_val_if_fail (buf != NULL, GST_FLOW_ERROR);
flxdec = (GstFlxDec *) parent;
g_return_val_if_fail (flxdec != NULL, GST_FLOW_ERROR);
gst_adapter_push (flxdec->adapter, buf);
available = gst_adapter_available (flxdec->adapter);
input = gst_adapter_get_buffer (flxdec->adapter, available);
if (!gst_buffer_map (input, &map_info, GST_MAP_READ)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Failed to map buffer"), (NULL));
goto error;
}
gst_byte_reader_init (&reader, map_info.data, map_info.size);
if (flxdec->state == GST_FLXDEC_READ_HEADER) {
if (available >= FlxHeaderSize) {
GstByteReader header;
GstCaps *templ;
if (!gst_byte_reader_get_sub_reader (&reader, &header, FlxHeaderSize)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Could not read header"), (NULL));
goto unmap_input_error;
}
gst_adapter_flush (flxdec->adapter, FlxHeaderSize);
available -= FlxHeaderSize;
if (!_read_flx_header (flxdec, &header, &flxdec->hdr)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Failed to parse header"), (NULL));
goto unmap_input_error;
}
flxh = &flxdec->hdr;
/* check header */
if (flxh->type != FLX_MAGICHDR_FLI &&
flxh->type != FLX_MAGICHDR_FLC && flxh->type != FLX_MAGICHDR_FLX) {
GST_ELEMENT_ERROR (flxdec, STREAM, WRONG_TYPE, (NULL),
("not a flx file (type %x)", flxh->type));
goto unmap_input_error;
}
GST_INFO_OBJECT (flxdec, "size : %d", flxh->size);
GST_INFO_OBJECT (flxdec, "frames : %d", flxh->frames);
GST_INFO_OBJECT (flxdec, "width : %d", flxh->width);
GST_INFO_OBJECT (flxdec, "height : %d", flxh->height);
GST_INFO_OBJECT (flxdec, "depth : %d", flxh->depth);
GST_INFO_OBJECT (flxdec, "speed : %d", flxh->speed);
flxdec->next_time = 0;
if (flxh->type == FLX_MAGICHDR_FLI) {
flxdec->frame_time = JIFFIE * flxh->speed;
} else if (flxh->speed == 0) {
flxdec->frame_time = GST_SECOND / 70;
} else {
flxdec->frame_time = flxh->speed * GST_MSECOND;
}
flxdec->duration = flxh->frames * flxdec->frame_time;
GST_LOG ("duration : %" GST_TIME_FORMAT,
GST_TIME_ARGS (flxdec->duration));
templ = gst_pad_get_pad_template_caps (flxdec->srcpad);
caps = gst_caps_copy (templ);
gst_caps_unref (templ);
gst_caps_set_simple (caps,
"width", G_TYPE_INT, flxh->width,
"height", G_TYPE_INT, flxh->height,
"framerate", GST_TYPE_FRACTION, (gint) GST_MSECOND,
(gint) flxdec->frame_time / 1000, NULL);
gst_pad_set_caps (flxdec->srcpad, caps);
gst_caps_unref (caps);
if (flxdec->need_segment) {
gst_pad_push_event (flxdec->srcpad,
gst_event_new_segment (&flxdec->segment));
flxdec->need_segment = FALSE;
}
/* zero means 8 */
if (flxh->depth == 0)
flxh->depth = 8;
if (flxh->depth != 8) {
GST_ELEMENT_ERROR (flxdec, STREAM, WRONG_TYPE,
("%s", "Don't know how to decode non 8 bit depth streams"), (NULL));
goto unmap_input_error;
}
flxdec->converter =
flx_colorspace_converter_new (flxh->width, flxh->height);
if (flxh->type == FLX_MAGICHDR_FLC || flxh->type == FLX_MAGICHDR_FLX) {
GST_INFO_OBJECT (flxdec, "(FLC) aspect_dx : %d", flxh->aspect_dx);
GST_INFO_OBJECT (flxdec, "(FLC) aspect_dy : %d", flxh->aspect_dy);
GST_INFO_OBJECT (flxdec, "(FLC) oframe1 : 0x%08x", flxh->oframe1);
GST_INFO_OBJECT (flxdec, "(FLC) oframe2 : 0x%08x", flxh->oframe2);
}
flxdec->size = ((guint) flxh->width * (guint) flxh->height);
if (flxdec->size >= G_MAXSIZE / 4) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Cannot allocate required memory"), (NULL));
goto unmap_input_error;
}
/* create delta and output frame */
flxdec->frame_data = g_malloc0 (flxdec->size);
flxdec->delta_data = g_malloc0 (flxdec->size);
flxdec->state = GST_FLXDEC_PLAYING;
}
} else if (flxdec->state == GST_FLXDEC_PLAYING) {
GstBuffer *out;
/* while we have enough data in the adapter */
while (available >= FlxFrameChunkSize && res == GST_FLOW_OK) {
guint32 size;
guint16 type;
if (!gst_byte_reader_get_uint32_le (&reader, &size))
goto parse_error;
if (available < size)
goto need_more_data;
available -= size;
gst_adapter_flush (flxdec->adapter, size);
if (!gst_byte_reader_get_uint16_le (&reader, &type))
goto parse_error;
switch (type) {
case FLX_FRAME_TYPE:{
GstByteReader chunks;
GstByteWriter writer;
guint16 n_chunks;
GstMapInfo map;
GST_LOG_OBJECT (flxdec, "Have frame type 0x%02x of size %d", type,
size);
if (!gst_byte_reader_get_sub_reader (&reader, &chunks,
size - FlxFrameChunkSize))
goto parse_error;
if (!gst_byte_reader_get_uint16_le (&chunks, &n_chunks))
goto parse_error;
GST_LOG_OBJECT (flxdec, "Have %d chunks", n_chunks);
if (n_chunks == 0)
break;
if (!gst_byte_reader_skip (&chunks, 8)) /* reserved */
goto parse_error;
gst_byte_writer_init_with_data (&writer, flxdec->frame_data,
flxdec->size, TRUE);
/* decode chunks */
if (!flx_decode_chunks (flxdec, n_chunks, &chunks, &writer)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Could not decode chunk"), NULL);
goto unmap_input_error;
}
gst_byte_writer_reset (&writer);
/* save copy of the current frame for possible delta. */
memcpy (flxdec->delta_data, flxdec->frame_data, flxdec->size);
out = gst_buffer_new_and_alloc (flxdec->size * 4);
if (!gst_buffer_map (out, &map, GST_MAP_WRITE)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Could not map output buffer"), NULL);
gst_buffer_unref (out);
goto unmap_input_error;
}
/* convert current frame. */
flx_colorspace_convert (flxdec->converter, flxdec->frame_data,
map.data);
gst_buffer_unmap (out, &map);
GST_BUFFER_TIMESTAMP (out) = flxdec->next_time;
flxdec->next_time += flxdec->frame_time;
res = gst_pad_push (flxdec->srcpad, out);
break;
}
default:
GST_DEBUG_OBJECT (flxdec, "Unknown frame type 0x%02x, skipping %d",
type, size);
if (!gst_byte_reader_skip (&reader, size - FlxFrameChunkSize))
goto parse_error;
break;
}
}
}
need_more_data:
gst_buffer_unmap (input, &map_info);
gst_buffer_unref (input);
return res;
/* ERRORS */
parse_error:
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Failed to parse stream"), (NULL));
unmap_input_error:
gst_buffer_unmap (input, &map_info);
error:
gst_buffer_unref (input);
return GST_FLOW_ERROR;
}
static GstStateChangeReturn
gst_flxdec_change_state (GstElement * element, GstStateChange transition)
{
GstFlxDec *flxdec;
GstStateChangeReturn ret;
flxdec = GST_FLXDEC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_adapter_clear (flxdec->adapter);
flxdec->state = GST_FLXDEC_READ_HEADER;
gst_segment_init (&flxdec->segment, GST_FORMAT_UNDEFINED);
flxdec->need_segment = TRUE;
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
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:
if (flxdec->frame_data) {
g_free (flxdec->frame_data);
flxdec->frame_data = NULL;
}
if (flxdec->delta_data) {
g_free (flxdec->delta_data);
flxdec->delta_data = NULL;
}
if (flxdec->converter) {
flx_colorspace_converter_destroy (flxdec->converter);
flxdec->converter = NULL;
}
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return GST_ELEMENT_REGISTER (flxdec, plugin);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
flxdec,
"FLC/FLI/FLX video decoder",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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