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gstreamer/ext/openexr/gstopenexrdec.cpp

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/*
* Copyright (C) 2013 Sebastian Dröge <sebastian@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.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstopenexrdec.h"
#include <gst/base/base.h>
#include <string.h>
#include <ImfRgbaFile.h>
#include <ImfIO.h>
using namespace Imf;
using namespace Imath;
/* Memory stream reader */
class MemIStream:public IStream
{
public:
MemIStream (const char *file_name, const guint8 * data,
gsize size):IStream (file_name), data (data), offset (0), size (size)
{
}
virtual bool read (char c[], int n);
virtual Int64 tellg ();
virtual void seekg (Int64 pos);
virtual void clear ();
private:
const guint8 *data;
gsize offset, size;
};
bool MemIStream::read (char c[], int n)
{
if (offset + n > size)
throw
Iex::InputExc ("Unexpected end of file");
memcpy (c, data + offset, n);
offset += n;
return (offset == size);
}
Int64 MemIStream::tellg ()
{
return offset;
}
void
MemIStream::seekg (Int64 pos)
{
offset = pos;
if (offset > size)
offset = size;
}
void
MemIStream::clear ()
{
}
GST_DEBUG_CATEGORY_STATIC (gst_openexr_dec_debug);
#define GST_CAT_DEFAULT gst_openexr_dec_debug
static gboolean gst_openexr_dec_start (GstVideoDecoder * decoder);
static gboolean gst_openexr_dec_stop (GstVideoDecoder * decoder);
static GstFlowReturn gst_openexr_dec_parse (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame, GstAdapter * adapter, gboolean at_eos);
static gboolean gst_openexr_dec_set_format (GstVideoDecoder * decoder,
GstVideoCodecState * state);
static GstFlowReturn gst_openexr_dec_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame);
static gboolean gst_openexr_dec_decide_allocation (GstVideoDecoder * decoder,
GstQuery * query);
static GstStaticPadTemplate gst_openexr_dec_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("image/x-exr")
);
static GstStaticPadTemplate gst_openexr_dec_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("ARGB64"))
);
#define parent_class gst_openexr_dec_parent_class
G_DEFINE_TYPE (GstOpenEXRDec, gst_openexr_dec, GST_TYPE_VIDEO_DECODER);
static void
gst_openexr_dec_class_init (GstOpenEXRDecClass * klass)
{
GstElementClass *element_class;
GstVideoDecoderClass *video_decoder_class;
element_class = (GstElementClass *) klass;
video_decoder_class = (GstVideoDecoderClass *) klass;
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_openexr_dec_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_openexr_dec_sink_template));
gst_element_class_set_static_metadata (element_class,
"OpenEXR decoder",
"Codec/Decoder/Video",
"Decode EXR streams", "Sebastian Dröge <sebastian@centricular.com>");
video_decoder_class->start = GST_DEBUG_FUNCPTR (gst_openexr_dec_start);
video_decoder_class->stop = GST_DEBUG_FUNCPTR (gst_openexr_dec_stop);
video_decoder_class->parse = GST_DEBUG_FUNCPTR (gst_openexr_dec_parse);
video_decoder_class->set_format =
GST_DEBUG_FUNCPTR (gst_openexr_dec_set_format);
video_decoder_class->handle_frame =
GST_DEBUG_FUNCPTR (gst_openexr_dec_handle_frame);
video_decoder_class->decide_allocation = gst_openexr_dec_decide_allocation;
GST_DEBUG_CATEGORY_INIT (gst_openexr_dec_debug, "openexrdec", 0,
"OpenEXR Decoder");
}
static void
gst_openexr_dec_init (GstOpenEXRDec * self)
{
GstVideoDecoder *decoder = (GstVideoDecoder *) self;
gst_video_decoder_set_packetized (decoder, FALSE);
}
static gboolean
gst_openexr_dec_start (GstVideoDecoder * decoder)
{
GstOpenEXRDec *self = GST_OPENEXR_DEC (decoder);
GST_DEBUG_OBJECT (self, "Starting");
return TRUE;
}
static gboolean
gst_openexr_dec_stop (GstVideoDecoder * video_decoder)
{
GstOpenEXRDec *self = GST_OPENEXR_DEC (video_decoder);
GST_DEBUG_OBJECT (self, "Stopping");
if (self->output_state) {
gst_video_codec_state_unref (self->output_state);
self->output_state = NULL;
}
if (self->input_state) {
gst_video_codec_state_unref (self->input_state);
self->input_state = NULL;
}
GST_DEBUG_OBJECT (self, "Stopped");
return TRUE;
}
static GstFlowReturn
gst_openexr_dec_parse (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame, GstAdapter * adapter, gboolean at_eos)
{
GstByteReader reader;
const guint8 *data;
gsize size;
guint32 u32;
guint64 u64;
guint8 version;
gboolean single_tile, long_name;
gboolean non_image, multipart;
/* *INDENT-OFF * */
struct
{
guint32 x1, y1, x2, y2;
} data_window = {
(guint32) - 1, (guint32) - 1, (guint32) - 1, (guint32) - 1};
struct
{
guint32 w, h;
guint8 mode;
} tile_desc = {
(guint32) - 1, (guint32) - 1, (guint8) - 1};
guint8 compression = (guint8) - 1;
guint32 chunk_count = (guint32) - 1;
/* *INDENT-ON * */
size = gst_adapter_available (adapter);
GST_DEBUG_OBJECT (decoder, "Parsing OpenEXR image data %" G_GSIZE_FORMAT,
size);
if (size < 8)
goto need_more_data;
data = (const guint8 *) gst_adapter_map (adapter, size);
gst_byte_reader_init (&reader, data, size);
/* Must start with the OpenEXR magic number */
if (!gst_byte_reader_peek_uint32_le (&reader, &u32))
goto need_more_data;
if (u32 != 0x01312f76) {
for (;;) {
guint offset;
offset = gst_byte_reader_masked_scan_uint32 (&reader, 0xffffffff,
0x762f3101, 0, gst_byte_reader_get_remaining (&reader));
if (offset == (guint) - 1) {
gst_adapter_flush (adapter,
gst_byte_reader_get_remaining (&reader) - 4);
goto need_more_data;
}
if (!gst_byte_reader_skip (&reader, offset))
goto need_more_data;
if (!gst_byte_reader_peek_uint32_le (&reader, &u32))
goto need_more_data;
if (u32 == 0x01312f76) {
/* We're skipping, go out, we'll be back */
gst_adapter_flush (adapter, gst_byte_reader_get_pos (&reader));
goto need_more_data;
}
if (!gst_byte_reader_skip (&reader, 4))
goto need_more_data;
}
}
/* Now we're at the magic number */
if (!gst_byte_reader_skip (&reader, 4))
goto need_more_data;
/* version and flags */
if (!gst_byte_reader_get_uint32_le (&reader, &u32))
goto need_more_data;
version = (u32 & 0xff);
if (version != 1 && version != 2) {
GST_ERROR_OBJECT (decoder, "Unsupported OpenEXR version %d", version);
return GST_FLOW_NOT_NEGOTIATED;
}
single_tile = ! !(u32 & 0x200);
long_name = ! !(u32 & 0x400);
non_image = ! !(u32 & 0x800);
multipart = ! !(u32 & 0x1000);
GST_DEBUG_OBJECT (decoder,
"OpenEXR image version %d, single tile %d, long name %d, non-image %d, multipart %d",
version, single_tile, long_name, non_image, multipart);
/* attributes */
if (multipart) {
GST_WARNING_OBJECT (decoder, "Multipart files not supported");
return GST_FLOW_NOT_NEGOTIATED;
}
if (non_image) {
GST_WARNING_OBJECT (decoder, "Deep-data images not supported");
return GST_FLOW_NOT_NEGOTIATED;
}
/* Read attributes */
for (;;) {
const gchar *name, *type;
guint8 u8;
if (!gst_byte_reader_peek_uint8 (&reader, &u8))
goto need_more_data;
if (u8 == 0) {
gst_byte_reader_skip (&reader, 1);
break;
}
if (!gst_byte_reader_get_string_utf8 (&reader, &name))
goto need_more_data;
if (!gst_byte_reader_get_string_utf8 (&reader, &type))
goto need_more_data;
if (!gst_byte_reader_get_uint32_le (&reader, &u32))
goto need_more_data;
if (gst_byte_reader_get_remaining (&reader) < u32)
goto need_more_data;
if (strcmp (name, "dataWindow") == 0) {
if (strcmp (type, "box2i") != 0 || u32 != 16)
return GST_FLOW_ERROR;
data_window.x1 = gst_byte_reader_get_uint32_le_unchecked (&reader);
data_window.y1 = gst_byte_reader_get_uint32_le_unchecked (&reader);
data_window.x2 = gst_byte_reader_get_uint32_le_unchecked (&reader);
data_window.y2 = gst_byte_reader_get_uint32_le_unchecked (&reader);
} else if (strcmp (name, "tiles") == 0) {
if (strcmp (type, "tiledesc") != 0 || u32 != 9)
return GST_FLOW_ERROR;
tile_desc.w = gst_byte_reader_get_uint32_le_unchecked (&reader);
tile_desc.h = gst_byte_reader_get_uint32_le_unchecked (&reader);
tile_desc.mode = gst_byte_reader_get_uint8_unchecked (&reader);
} else if (strcmp (name, "compression") == 0) {
if (strcmp (type, "compression") != 0 || u32 != 1)
return GST_FLOW_ERROR;
compression = gst_byte_reader_get_uint8_unchecked (&reader);
} else if (strcmp (name, "chunkCount") == 0) {
if (strcmp (type, "int") != 0 || u32 != 4)
return GST_FLOW_ERROR;
chunk_count = gst_byte_reader_get_uint32_le_unchecked (&reader);
} else {
gst_byte_reader_skip_unchecked (&reader, u32);
}
}
if (data_window.x1 == (guint32) - 1)
return GST_FLOW_ERROR;
if (data_window.x2 < data_window.x1)
return GST_FLOW_ERROR;
if (data_window.y2 < data_window.y1)
return GST_FLOW_ERROR;
if (compression == (guint8) - 1)
return GST_FLOW_ERROR;
if (single_tile && tile_desc.w == (guint32) - 1)
return GST_FLOW_ERROR;
GST_DEBUG_OBJECT (decoder, "Have data window (%u, %u)x(%u, %u)",
data_window.x1, data_window.y1, data_window.x2, data_window.y2);
GST_DEBUG_OBJECT (decoder, "Have compression %u", compression);
if (single_tile)
GST_DEBUG_OBJECT (decoder, "Have tiles (%u, %u), mode %u", tile_desc.w,
tile_desc.h, tile_desc.mode);
/* offset table */
if (chunk_count == (guint32) - 1) {
if (single_tile) {
guint xt, yt;
xt = data_window.x2 - data_window.x1 + 1;
xt = (xt + tile_desc.w - 1) / tile_desc.w;
yt = data_window.y2 - data_window.y1 + 1;
yt = (yt + tile_desc.h - 1) / tile_desc.h;
chunk_count = xt * yt;
GST_DEBUG_OBJECT (decoder, "Have %ux%u tiles", xt, yt);
} else {
chunk_count = data_window.y2 - data_window.y1 + 1;
switch (compression) {
case 0: /* NO */
case 1: /* RLE */
case 2: /* ZIPS */
break;
case 3: /* ZIP */
case 5: /* PXR24 */
chunk_count = (chunk_count + 15) / 16;
break;
case 4: /* PIZ */
case 6: /* B44 */
case 7: /* B44A */
chunk_count = (chunk_count + 31) / 32;
break;
default:
GST_WARNING_OBJECT (decoder, "Unsupported compression %u",
compression);
return GST_FLOW_NOT_NEGOTIATED;
}
}
} else {
GST_WARNING_OBJECT (decoder, "Chunk data not supported");
return GST_FLOW_NOT_NEGOTIATED;
}
if (gst_byte_reader_get_remaining (&reader) < chunk_count * 8)
goto need_more_data;
gst_byte_reader_skip_unchecked (&reader, (chunk_count - 1) * 8);
u64 = gst_byte_reader_get_uint64_le_unchecked (&reader);
GST_DEBUG_OBJECT (decoder, "Offset of last chunk %" G_GUINT64_FORMAT, u64);
/* pixel data */
/* go to the last pixel data chunk */
if (!gst_byte_reader_set_pos (&reader, u64))
goto need_more_data;
/* and read its size and skip it */
if (single_tile) {
if (!gst_byte_reader_skip (&reader, 4 * 4))
goto need_more_data;
if (!gst_byte_reader_get_uint32_le (&reader, &u32))
goto need_more_data;
if (!gst_byte_reader_skip (&reader, u32))
goto need_more_data;
} else {
if (!gst_byte_reader_skip (&reader, 4))
goto need_more_data;
if (!gst_byte_reader_get_uint32_le (&reader, &u32))
goto need_more_data;
if (!gst_byte_reader_skip (&reader, u32))
goto need_more_data;
}
GST_DEBUG_OBJECT (decoder, "Have complete image of size %u",
gst_byte_reader_get_pos (&reader));
gst_video_decoder_add_to_frame (decoder, gst_byte_reader_get_pos (&reader));
return gst_video_decoder_have_frame (decoder);
need_more_data:
GST_DEBUG_OBJECT (decoder, "Need more data");
return GST_VIDEO_DECODER_FLOW_NEED_DATA;
}
static gboolean
gst_openexr_dec_set_format (GstVideoDecoder * decoder,
GstVideoCodecState * state)
{
GstOpenEXRDec *self = GST_OPENEXR_DEC (decoder);
GST_DEBUG_OBJECT (self, "Setting format: %" GST_PTR_FORMAT, state->caps);
if (self->input_state)
gst_video_codec_state_unref (self->input_state);
self->input_state = gst_video_codec_state_ref (state);
return TRUE;
}
static GstFlowReturn
gst_openexr_dec_negotiate (GstOpenEXRDec * self, RgbaInputFile * file)
{
GstVideoFormat format;
gint width, height;
gfloat par;
/* TODO: Use displayWindow here and also support output of ARGB_F16 */
format = GST_VIDEO_FORMAT_ARGB64;
Box2i dw = file->dataWindow ();
width = dw.max.x - dw.min.x + 1;
height = dw.max.y - dw.min.y + 1;
par = file->pixelAspectRatio ();
if (!self->output_state ||
self->output_state->info.finfo->format != format ||
self->output_state->info.width != width ||
self->output_state->info.height != height) {
if (self->output_state)
gst_video_codec_state_unref (self->output_state);
self->output_state =
gst_video_decoder_set_output_state (GST_VIDEO_DECODER (self), format,
width, height, self->input_state);
GST_DEBUG_OBJECT (self, "Have image of size %dx%d (par %f)", width, height, par);
gst_util_double_to_fraction (par, &self->output_state->info.par_n, &self->output_state->info.par_d);
if (!gst_video_decoder_negotiate (GST_VIDEO_DECODER (self)))
return GST_FLOW_NOT_NEGOTIATED;
}
return GST_FLOW_OK;
}
static GstFlowReturn
gst_openexr_dec_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame)
{
GstOpenEXRDec *self = GST_OPENEXR_DEC (decoder);
GstFlowReturn ret = GST_FLOW_OK;
gint64 deadline;
GstMapInfo map;
GstVideoFrame vframe;
GST_DEBUG_OBJECT (self, "Handling frame");
deadline = gst_video_decoder_get_max_decode_time (decoder, frame);
if (deadline < 0) {
GST_LOG_OBJECT (self, "Dropping too late frame: deadline %" G_GINT64_FORMAT,
deadline);
ret = gst_video_decoder_drop_frame (decoder, frame);
return ret;
}
if (!gst_buffer_map (frame->input_buffer, &map, GST_MAP_READ)) {
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, CORE, FAILED,
("Failed to map input buffer"), (NULL));
return GST_FLOW_ERROR;
}
/* Now read the file and catch any exceptions */
MemIStream *istr;
RgbaInputFile *file;
try {
istr =
new
MemIStream (gst_pad_get_stream_id (GST_VIDEO_DECODER_SINK_PAD
(decoder)), map.data, map.size);
}
catch (Iex::BaseExc e) {
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, CORE, FAILED,
("Failed to create input stream"), (NULL));
return GST_FLOW_ERROR;
}
try {
file = new RgbaInputFile (*istr);
}
catch (Iex::BaseExc e) {
delete istr;
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, CORE, FAILED,
("Failed to read OpenEXR stream"), (NULL));
return GST_FLOW_ERROR;
}
ret = gst_openexr_dec_negotiate (self, file);
if (ret != GST_FLOW_OK) {
delete file;
delete istr;
gst_buffer_unmap (frame->input_buffer, &map);
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, CORE, NEGOTIATION,
("Failed to negotiate"), (NULL));
return ret;
}
ret = gst_video_decoder_allocate_output_frame (decoder, frame);
if (ret != GST_FLOW_OK) {
delete file;
delete istr;
gst_buffer_unmap (frame->input_buffer, &map);
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, CORE, FAILED,
("Failed to allocate output buffer"), (NULL));
return ret;
}
if (!gst_video_frame_map (&vframe, &self->output_state->info,
frame->output_buffer, GST_MAP_WRITE)) {
delete file;
delete istr;
gst_buffer_unmap (frame->input_buffer, &map);
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, CORE, FAILED,
("Failed to map output buffer"), (NULL));
return GST_FLOW_ERROR;
}
/* Decode the file */
Box2i dw = file->dataWindow ();
int width = dw.max.x - dw.min.x + 1;
int height = dw.max.y - dw.min.y + 1;
Rgba *fb = new Rgba[width * height];
try {
file->setFrameBuffer (fb - dw.min.x - dw.min.y * width, 1, width);
file->readPixels (dw.min.y, dw.max.y);
} catch (Iex::BaseExc e) {
delete[](fb);
delete file;
delete istr;
gst_buffer_unmap (frame->input_buffer, &map);
gst_video_frame_unmap (&vframe);
GST_ELEMENT_ERROR (self, CORE, FAILED, ("Failed to read pixels"), (NULL));
return GST_FLOW_ERROR;
}
/* And convert from ARGB64_F16 to ARGB64 */
gint i, j;
guint16 *dest = (guint16 *) GST_VIDEO_FRAME_PLANE_DATA (&vframe, 0);
guint dstride = GST_VIDEO_FRAME_PLANE_STRIDE (&vframe, 0);
Rgba *ptr = fb;
/* TODO: Use displayWindow here and also support output of ARGB_F16
* and add a conversion filter element that can change exposure and
* other things */
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
dest[4 * j + 0] = CLAMP (((float) ptr->a) * 65536, 0, 65535);
dest[4 * j + 1] = CLAMP (((float) ptr->r) * 65536, 0, 65535);
dest[4 * j + 2] = CLAMP (((float) ptr->g) * 65536, 0, 65535);
dest[4 * j + 3] = CLAMP (((float) ptr->b) * 65536, 0, 65535);
ptr++;
}
dest += dstride / 2;
}
delete[](fb);
delete file;
delete istr;
gst_buffer_unmap (frame->input_buffer, &map);
gst_video_frame_unmap (&vframe);
ret = gst_video_decoder_finish_frame (decoder, frame);
return ret;
}
static gboolean
gst_openexr_dec_decide_allocation (GstVideoDecoder * decoder, GstQuery * query)
{
GstBufferPool *pool;
GstStructure *config;
if (!GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation (decoder,
query))
return FALSE;
g_assert (gst_query_get_n_allocation_pools (query) > 0);
gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
g_assert (pool != NULL);
config = gst_buffer_pool_get_config (pool);
if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) {
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
}
gst_buffer_pool_set_config (pool, config);
gst_object_unref (pool);
return TRUE;
}
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