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gstreamer/ext/jpeg/gstjpegdec.c
Michael Olbrich 0b25487cd1 jpegdec: don't overwrite the last valid line 
If the the height is not a multiple of the macro block size then the memory
of the last line is reused for all extra lines. This is no problem if the
last line is duplicated properly. However, if the extra lines are not
initialized properly during encoding, then the last visible line is
overwritten with undefined data.
Use a extra buffer to avoid this problem.
2019-11-10 11:24:40 +01:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2009> Tim-Philipp Müller <tim centricular net>
* Copyright (C) 2012 Collabora Ltd.
* Author : Edward Hervey <edward@collabora.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-jpegdec
* @title: jpegdec
*
* Decodes jpeg images.
*
* ## Example launch line
* |[
* gst-launch-1.0 -v filesrc location=mjpeg.avi ! avidemux ! queue ! jpegdec ! videoconvert ! videoscale ! autovideosink
* ]| The above pipeline decode the mjpeg stream and renders it to the screen.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstjpegdec.h"
#include "gstjpeg.h"
#include <gst/video/video.h>
#include <gst/video/gstvideometa.h>
#include <gst/video/gstvideopool.h>
#include "gst/gst-i18n-plugin.h"
#include <jerror.h>
#define MIN_WIDTH 1
#define MAX_WIDTH 65535
#define MIN_HEIGHT 1
#define MAX_HEIGHT 65535
#define CINFO_GET_JPEGDEC(cinfo_ptr) \
(((struct GstJpegDecSourceMgr*)((cinfo_ptr)->src))->dec)
#define JPEG_DEFAULT_IDCT_METHOD JDCT_FASTEST
#define JPEG_DEFAULT_MAX_ERRORS 0
enum
{
PROP_0,
PROP_IDCT_METHOD,
PROP_MAX_ERRORS
};
/* *INDENT-OFF* */
static GstStaticPadTemplate gst_jpeg_dec_src_pad_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE
("{ I420, RGB, BGR, RGBx, xRGB, BGRx, xBGR, GRAY8 }"))
);
/* *INDENT-ON* */
/* FIXME: sof-marker is for IJG libjpeg 8, should be different for 6.2 */
/* FIXME: add back "sof-marker = (int) { 0, 1, 2, 5, 6, 7, 9, 10, 13, 14 }"
* once we have a parser and/or demuxer set caps properly */
static GstStaticPadTemplate gst_jpeg_dec_sink_pad_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("image/jpeg")
);
GST_DEBUG_CATEGORY_STATIC (jpeg_dec_debug);
#define GST_CAT_DEFAULT jpeg_dec_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_PERFORMANCE);
static void gst_jpeg_dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_jpeg_dec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_jpeg_dec_set_format (GstVideoDecoder * dec,
GstVideoCodecState * state);
static gboolean gst_jpeg_dec_start (GstVideoDecoder * bdec);
static gboolean gst_jpeg_dec_stop (GstVideoDecoder * bdec);
static gboolean gst_jpeg_dec_flush (GstVideoDecoder * bdec);
static GstFlowReturn gst_jpeg_dec_parse (GstVideoDecoder * bdec,
GstVideoCodecFrame * frame, GstAdapter * adapter, gboolean at_eos);
static GstFlowReturn gst_jpeg_dec_handle_frame (GstVideoDecoder * bdec,
GstVideoCodecFrame * frame);
static gboolean gst_jpeg_dec_decide_allocation (GstVideoDecoder * bdec,
GstQuery * query);
static gboolean gst_jpeg_dec_sink_event (GstVideoDecoder * bdec,
GstEvent * event);
#define gst_jpeg_dec_parent_class parent_class
G_DEFINE_TYPE (GstJpegDec, gst_jpeg_dec, GST_TYPE_VIDEO_DECODER);
static void
gst_jpeg_dec_finalize (GObject * object)
{
GstJpegDec *dec = GST_JPEG_DEC (object);
jpeg_destroy_decompress (&dec->cinfo);
if (dec->input_state)
gst_video_codec_state_unref (dec->input_state);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_jpeg_dec_class_init (GstJpegDecClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
GstVideoDecoderClass *vdec_class;
gobject_class = (GObjectClass *) klass;
element_class = (GstElementClass *) klass;
vdec_class = (GstVideoDecoderClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = gst_jpeg_dec_finalize;
gobject_class->set_property = gst_jpeg_dec_set_property;
gobject_class->get_property = gst_jpeg_dec_get_property;
g_object_class_install_property (gobject_class, PROP_IDCT_METHOD,
g_param_spec_enum ("idct-method", "IDCT Method",
"The IDCT algorithm to use", GST_TYPE_IDCT_METHOD,
JPEG_DEFAULT_IDCT_METHOD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstJpegDec:max-errors:
*
* Error out after receiving N consecutive decoding errors
* (-1 = never error out, 0 = automatic, 1 = fail on first error, etc.)
*
* Deprecated: 1.3.1: Property wasn't used internally
*/
#ifndef GST_REMOVE_DEPRECATED
g_object_class_install_property (gobject_class, PROP_MAX_ERRORS,
g_param_spec_int ("max-errors", "Maximum Consecutive Decoding Errors",
"(Deprecated) Error out after receiving N consecutive decoding errors"
" (-1 = never fail, 0 = automatic, 1 = fail on first error)",
-1, G_MAXINT, JPEG_DEFAULT_MAX_ERRORS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_DEPRECATED));
#endif
gst_element_class_add_static_pad_template (element_class,
&gst_jpeg_dec_src_pad_template);
gst_element_class_add_static_pad_template (element_class,
&gst_jpeg_dec_sink_pad_template);
gst_element_class_set_static_metadata (element_class, "JPEG image decoder",
"Codec/Decoder/Image", "Decode images from JPEG format",
"Wim Taymans <wim@fluendo.com>");
vdec_class->start = gst_jpeg_dec_start;
vdec_class->stop = gst_jpeg_dec_stop;
vdec_class->flush = gst_jpeg_dec_flush;
vdec_class->parse = gst_jpeg_dec_parse;
vdec_class->set_format = gst_jpeg_dec_set_format;
vdec_class->handle_frame = gst_jpeg_dec_handle_frame;
vdec_class->decide_allocation = gst_jpeg_dec_decide_allocation;
vdec_class->sink_event = gst_jpeg_dec_sink_event;
GST_DEBUG_CATEGORY_INIT (jpeg_dec_debug, "jpegdec", 0, "JPEG decoder");
GST_DEBUG_CATEGORY_GET (GST_CAT_PERFORMANCE, "GST_PERFORMANCE");
}
static boolean
gst_jpeg_dec_fill_input_buffer (j_decompress_ptr cinfo)
{
/* We pass in full frame initially, if this get called, the frame is most likely
* corrupted */
return FALSE;
}
static void
gst_jpeg_dec_init_source (j_decompress_ptr cinfo)
{
GST_LOG_OBJECT (CINFO_GET_JPEGDEC (cinfo), "init_source");
}
static void
gst_jpeg_dec_skip_input_data (j_decompress_ptr cinfo, glong num_bytes)
{
GstJpegDec *dec = CINFO_GET_JPEGDEC (cinfo);
GST_DEBUG_OBJECT (dec, "skip %ld bytes", num_bytes);
if (num_bytes > 0 && cinfo->src->bytes_in_buffer >= num_bytes) {
cinfo->src->next_input_byte += (size_t) num_bytes;
cinfo->src->bytes_in_buffer -= (size_t) num_bytes;
}
}
static boolean
gst_jpeg_dec_resync_to_restart (j_decompress_ptr cinfo, gint desired)
{
GST_LOG_OBJECT (CINFO_GET_JPEGDEC (cinfo), "resync_to_start");
return TRUE;
}
static void
gst_jpeg_dec_term_source (j_decompress_ptr cinfo)
{
GST_LOG_OBJECT (CINFO_GET_JPEGDEC (cinfo), "term_source");
return;
}
METHODDEF (void)
gst_jpeg_dec_my_output_message (j_common_ptr cinfo)
{
return; /* do nothing */
}
METHODDEF (void)
gst_jpeg_dec_my_emit_message (j_common_ptr cinfo, int msg_level)
{
/* GST_LOG_OBJECT (CINFO_GET_JPEGDEC (&cinfo), "msg_level=%d", msg_level); */
return;
}
METHODDEF (void)
gst_jpeg_dec_my_error_exit (j_common_ptr cinfo)
{
struct GstJpegDecErrorMgr *err_mgr = (struct GstJpegDecErrorMgr *) cinfo->err;
(*cinfo->err->output_message) (cinfo);
longjmp (err_mgr->setjmp_buffer, 1);
}
static void
gst_jpeg_dec_init (GstJpegDec * dec)
{
GST_DEBUG ("initializing");
/* setup jpeglib */
memset (&dec->cinfo, 0, sizeof (dec->cinfo));
memset (&dec->jerr, 0, sizeof (dec->jerr));
dec->cinfo.err = jpeg_std_error (&dec->jerr.pub);
dec->jerr.pub.output_message = gst_jpeg_dec_my_output_message;
dec->jerr.pub.emit_message = gst_jpeg_dec_my_emit_message;
dec->jerr.pub.error_exit = gst_jpeg_dec_my_error_exit;
jpeg_create_decompress (&dec->cinfo);
dec->cinfo.src = (struct jpeg_source_mgr *) &dec->jsrc;
dec->cinfo.src->init_source = gst_jpeg_dec_init_source;
dec->cinfo.src->fill_input_buffer = gst_jpeg_dec_fill_input_buffer;
dec->cinfo.src->skip_input_data = gst_jpeg_dec_skip_input_data;
dec->cinfo.src->resync_to_restart = gst_jpeg_dec_resync_to_restart;
dec->cinfo.src->term_source = gst_jpeg_dec_term_source;
dec->jsrc.dec = dec;
/* init properties */
dec->idct_method = JPEG_DEFAULT_IDCT_METHOD;
dec->max_errors = JPEG_DEFAULT_MAX_ERRORS;
gst_video_decoder_set_use_default_pad_acceptcaps (GST_VIDEO_DECODER_CAST
(dec), TRUE);
GST_PAD_SET_ACCEPT_TEMPLATE (GST_VIDEO_DECODER_SINK_PAD (dec));
}
static inline gboolean
gst_jpeg_dec_parse_tag_has_entropy_segment (guint8 tag)
{
if (tag == 0xda || (tag >= 0xd0 && tag <= 0xd7))
return TRUE;
return FALSE;
}
static GstFlowReturn
gst_jpeg_dec_parse (GstVideoDecoder * bdec, GstVideoCodecFrame * frame,
GstAdapter * adapter, gboolean at_eos)
{
guint size;
gint toadd = 0;
gboolean resync;
gint offset = 0, noffset;
GstJpegDec *dec = (GstJpegDec *) bdec;
GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
/* FIXME : The overhead of using scan_uint32 is massive */
size = gst_adapter_available (adapter);
GST_DEBUG ("Parsing jpeg image data (%u bytes)", size);
if (at_eos) {
GST_DEBUG ("Flushing all data out");
toadd = size;
/* If we have leftover data, throw it away */
if (!dec->saw_header)
goto drop_frame;
goto have_full_frame;
}
if (size < 8)
goto need_more_data;
if (!dec->saw_header) {
gint ret;
/* we expect at least 4 bytes, first of which start marker */
ret =
gst_adapter_masked_scan_uint32 (adapter, 0xffff0000, 0xffd80000, 0,
size - 4);
GST_DEBUG ("ret:%d", ret);
if (ret < 0)
goto need_more_data;
if (ret) {
gst_adapter_flush (adapter, ret);
size -= ret;
}
dec->saw_header = TRUE;
}
while (1) {
guint frame_len;
guint32 value;
GST_DEBUG ("offset:%d, size:%d", offset, size);
noffset =
gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00, 0x0000ff00,
offset, size - offset, &value);
/* lost sync if 0xff marker not where expected */
if ((resync = (noffset != offset))) {
GST_DEBUG ("Lost sync at 0x%08x, resyncing", offset + 2);
}
/* may have marker, but could have been resyncng */
resync = resync || dec->parse_resync;
/* Skip over extra 0xff */
while ((noffset >= 0) && ((value & 0xff) == 0xff)) {
noffset++;
noffset =
gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00, 0x0000ff00,
noffset, size - noffset, &value);
}
/* enough bytes left for marker? (we need 0xNN after the 0xff) */
if (noffset < 0) {
GST_DEBUG ("at end of input and no EOI marker found, need more data");
goto need_more_data;
}
/* now lock on the marker we found */
offset = noffset;
value = value & 0xff;
if (value == 0xd9) {
GST_DEBUG ("0x%08x: EOI marker", offset + 2);
/* clear parse state */
dec->saw_header = FALSE;
dec->parse_resync = FALSE;
toadd = offset + 4;
goto have_full_frame;
}
if (value == 0xd8) {
GST_DEBUG ("0x%08x: SOI marker before EOI marker", offset + 2);
/* clear parse state */
dec->saw_header = FALSE;
dec->parse_resync = FALSE;
toadd = offset;
goto have_full_frame;
}
if (value >= 0xd0 && value <= 0xd7)
frame_len = 0;
else {
/* peek tag and subsequent length */
if (offset + 2 + 4 > size)
goto need_more_data;
else
gst_adapter_masked_scan_uint32_peek (adapter, 0x0, 0x0, offset + 2, 4,
&frame_len);
frame_len = frame_len & 0xffff;
}
GST_DEBUG ("0x%08x: tag %02x, frame_len=%u", offset + 2, value, frame_len);
/* the frame length includes the 2 bytes for the length; here we want at
* least 2 more bytes at the end for an end marker */
if (offset + 2 + 2 + frame_len + 2 > size) {
goto need_more_data;
}
if (gst_jpeg_dec_parse_tag_has_entropy_segment (value)) {
guint eseglen = dec->parse_entropy_len;
GST_DEBUG ("0x%08x: finding entropy segment length (eseglen:%d)",
offset + 2, eseglen);
if (size < offset + 2 + frame_len + eseglen)
goto need_more_data;
noffset = offset + 2 + frame_len + dec->parse_entropy_len;
while (1) {
GST_DEBUG ("noffset:%d, size:%d, size - noffset:%d",
noffset, size, size - noffset);
noffset = gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00,
0x0000ff00, noffset, size - noffset, &value);
if (noffset < 0) {
/* need more data */
dec->parse_entropy_len = size - offset - 4 - frame_len - 2;
goto need_more_data;
}
if ((value & 0xff) != 0x00) {
eseglen = noffset - offset - frame_len - 2;
break;
}
noffset++;
}
dec->parse_entropy_len = 0;
frame_len += eseglen;
GST_DEBUG ("entropy segment length=%u => frame_len=%u", eseglen,
frame_len);
}
if (resync) {
/* check if we will still be in sync if we interpret
* this as a sync point and skip this frame */
noffset = offset + frame_len + 2;
noffset = gst_adapter_masked_scan_uint32 (adapter, 0x0000ff00, 0x0000ff00,
noffset, 4);
if (noffset < 0) {
/* ignore and continue resyncing until we hit the end
* of our data or find a sync point that looks okay */
offset++;
continue;
}
GST_DEBUG ("found sync at 0x%x", offset + 2);
}
/* Add current data to output buffer */
toadd += frame_len + 2;
offset += frame_len + 2;
}
need_more_data:
if (toadd)
gst_video_decoder_add_to_frame (bdec, toadd);
return GST_VIDEO_DECODER_FLOW_NEED_DATA;
have_full_frame:
if (toadd)
gst_video_decoder_add_to_frame (bdec, toadd);
GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
return gst_video_decoder_have_frame (bdec);
drop_frame:
gst_adapter_flush (adapter, size);
return GST_FLOW_OK;
}
/* shamelessly ripped from jpegutils.c in mjpegtools */
static void
add_huff_table (j_decompress_ptr dinfo,
JHUFF_TBL ** htblptr, const UINT8 * bits, const UINT8 * val)
/* Define a Huffman table */
{
int nsymbols, len;
if (*htblptr == NULL)
*htblptr = jpeg_alloc_huff_table ((j_common_ptr) dinfo);
g_assert (*htblptr);
/* Copy the number-of-symbols-of-each-code-length counts */
memcpy ((*htblptr)->bits, bits, sizeof ((*htblptr)->bits));
/* Validate the counts. We do this here mainly so we can copy the right
* number of symbols from the val[] array, without risking marching off
* the end of memory. jchuff.c will do a more thorough test later.
*/
nsymbols = 0;
for (len = 1; len <= 16; len++)
nsymbols += bits[len];
if (nsymbols < 1 || nsymbols > 256)
g_error ("jpegutils.c: add_huff_table failed badly. ");
memcpy ((*htblptr)->huffval, val, nsymbols * sizeof (UINT8));
}
static void
std_huff_tables (j_decompress_ptr dinfo)
/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
/* IMPORTANT: these are only valid for 8-bit data precision! */
{
static const UINT8 bits_dc_luminance[17] =
{ /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
static const UINT8 val_dc_luminance[] =
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
static const UINT8 bits_dc_chrominance[17] =
{ /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
static const UINT8 val_dc_chrominance[] =
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
static const UINT8 bits_ac_luminance[17] =
{ /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
static const UINT8 val_ac_luminance[] =
{ 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
0xf9, 0xfa
};
static const UINT8 bits_ac_chrominance[17] =
{ /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
static const UINT8 val_ac_chrominance[] =
{ 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
0xf9, 0xfa
};
add_huff_table (dinfo, &dinfo->dc_huff_tbl_ptrs[0],
bits_dc_luminance, val_dc_luminance);
add_huff_table (dinfo, &dinfo->ac_huff_tbl_ptrs[0],
bits_ac_luminance, val_ac_luminance);
add_huff_table (dinfo, &dinfo->dc_huff_tbl_ptrs[1],
bits_dc_chrominance, val_dc_chrominance);
add_huff_table (dinfo, &dinfo->ac_huff_tbl_ptrs[1],
bits_ac_chrominance, val_ac_chrominance);
}
static void
guarantee_huff_tables (j_decompress_ptr dinfo)
{
if ((dinfo->dc_huff_tbl_ptrs[0] == NULL) &&
(dinfo->dc_huff_tbl_ptrs[1] == NULL) &&
(dinfo->ac_huff_tbl_ptrs[0] == NULL) &&
(dinfo->ac_huff_tbl_ptrs[1] == NULL)) {
GST_DEBUG ("Generating standard Huffman tables for this frame.");
std_huff_tables (dinfo);
}
}
static gboolean
gst_jpeg_dec_set_format (GstVideoDecoder * dec, GstVideoCodecState * state)
{
GstJpegDec *jpeg = GST_JPEG_DEC (dec);
if (jpeg->input_state)
gst_video_codec_state_unref (jpeg->input_state);
jpeg->input_state = gst_video_codec_state_ref (state);
return TRUE;
}
/* yuk */
static void
hresamplecpy1 (guint8 * dest, const guint8 * src, guint len)
{
gint i;
for (i = 0; i < len; ++i) {
/* equivalent to: dest[i] = src[i << 1] */
*dest = *src;
++dest;
++src;
++src;
}
}
static void
gst_jpeg_dec_free_buffers (GstJpegDec * dec)
{
gint i;
for (i = 0; i < 16; i++) {
g_free (dec->idr_y[i]);
g_free (dec->idr_u[i]);
g_free (dec->idr_v[i]);
dec->idr_y[i] = NULL;
dec->idr_u[i] = NULL;
dec->idr_v[i] = NULL;
}
dec->idr_width_allocated = 0;
}
static inline gboolean
gst_jpeg_dec_ensure_buffers (GstJpegDec * dec, guint maxrowbytes)
{
gint i;
if (G_LIKELY (dec->idr_width_allocated == maxrowbytes))
return TRUE;
/* FIXME: maybe just alloc one or three blocks altogether? */
for (i = 0; i < 16; i++) {
dec->idr_y[i] = g_try_realloc (dec->idr_y[i], maxrowbytes);
dec->idr_u[i] = g_try_realloc (dec->idr_u[i], maxrowbytes);
dec->idr_v[i] = g_try_realloc (dec->idr_v[i], maxrowbytes);
if (G_UNLIKELY (!dec->idr_y[i] || !dec->idr_u[i] || !dec->idr_v[i])) {
GST_WARNING_OBJECT (dec, "out of memory, i=%d, bytes=%u", i, maxrowbytes);
return FALSE;
}
}
dec->idr_width_allocated = maxrowbytes;
GST_LOG_OBJECT (dec, "allocated temp memory, %u bytes/row", maxrowbytes);
return TRUE;
}
static void
gst_jpeg_dec_decode_grayscale (GstJpegDec * dec, GstVideoFrame * frame,
guint field, guint num_fields)
{
guchar *rows[16];
guchar **scanarray[1] = { rows };
gint i, j, k;
gint lines;
guint8 *base[1];
gint width, height;
gint pstride, rstride;
GST_DEBUG_OBJECT (dec, "indirect decoding of grayscale");
width = GST_VIDEO_FRAME_WIDTH (frame);
height = GST_VIDEO_FRAME_HEIGHT (frame) / num_fields;
if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
return;
base[0] = GST_VIDEO_FRAME_COMP_DATA (frame, 0);
if (field == 2) {
base[0] += GST_VIDEO_FRAME_COMP_STRIDE (frame, 0);
}
pstride = GST_VIDEO_FRAME_COMP_PSTRIDE (frame, 0);
rstride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0) * num_fields;
memcpy (rows, dec->idr_y, 16 * sizeof (gpointer));
i = 0;
while (i < height) {
lines = jpeg_read_raw_data (&dec->cinfo, scanarray, DCTSIZE);
if (G_LIKELY (lines > 0)) {
for (j = 0; (j < DCTSIZE) && (i < height); j++, i++) {
gint p;
p = 0;
for (k = 0; k < width; k++) {
base[0][p] = rows[j][k];
p += pstride;
}
base[0] += rstride;
}
} else {
GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
}
}
}
static void
gst_jpeg_dec_decode_rgb (GstJpegDec * dec, GstVideoFrame * frame,
guint field, guint num_fields)
{
guchar *r_rows[16], *g_rows[16], *b_rows[16];
guchar **scanarray[3] = { r_rows, g_rows, b_rows };
gint i, j, k;
gint lines;
guint8 *base[3];
guint pstride, rstride;
gint width, height;
GST_DEBUG_OBJECT (dec, "indirect decoding of RGB");
width = GST_VIDEO_FRAME_WIDTH (frame);
height = GST_VIDEO_FRAME_HEIGHT (frame) / num_fields;
if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
return;
for (i = 0; i < 3; i++) {
base[i] = GST_VIDEO_FRAME_COMP_DATA (frame, i);
if (field == 2)
base[i] += GST_VIDEO_FRAME_COMP_STRIDE (frame, i);
}
pstride = GST_VIDEO_FRAME_COMP_PSTRIDE (frame, 0);
rstride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0) * num_fields;
memcpy (r_rows, dec->idr_y, 16 * sizeof (gpointer));
memcpy (g_rows, dec->idr_u, 16 * sizeof (gpointer));
memcpy (b_rows, dec->idr_v, 16 * sizeof (gpointer));
i = 0;
while (i < height) {
lines = jpeg_read_raw_data (&dec->cinfo, scanarray, DCTSIZE);
if (G_LIKELY (lines > 0)) {
for (j = 0; (j < DCTSIZE) && (i < height); j++, i++) {
gint p;
p = 0;
for (k = 0; k < width; k++) {
base[0][p] = r_rows[j][k];
base[1][p] = g_rows[j][k];
base[2][p] = b_rows[j][k];
p += pstride;
}
base[0] += rstride;
base[1] += rstride;
base[2] += rstride;
}
} else {
GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
}
}
}
static void
gst_jpeg_dec_decode_indirect (GstJpegDec * dec, GstVideoFrame * frame, gint r_v,
gint r_h, gint comp, guint field, guint num_fields)
{
guchar *y_rows[16], *u_rows[16], *v_rows[16];
guchar **scanarray[3] = { y_rows, u_rows, v_rows };
gint i, j, k;
gint lines;
guchar *base[3], *last[3];
gint rowsize[3], stride[3];
gint width, height;
GST_DEBUG_OBJECT (dec,
"unadvantageous width or r_h, taking slow route involving memcpy");
width = GST_VIDEO_FRAME_WIDTH (frame);
height = GST_VIDEO_FRAME_HEIGHT (frame);
if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
return;
for (i = 0; i < 3; i++) {
base[i] = GST_VIDEO_FRAME_COMP_DATA (frame, i);
stride[i] = GST_VIDEO_FRAME_COMP_STRIDE (frame, i) * num_fields;
rowsize[i] = GST_VIDEO_FRAME_COMP_STRIDE (frame, i);
/* make sure we don't make jpeglib write beyond our buffer,
* which might happen if (height % (r_v*DCTSIZE)) != 0 */
last[i] = base[i] + (GST_VIDEO_FRAME_COMP_STRIDE (frame, i) *
(GST_VIDEO_FRAME_COMP_HEIGHT (frame, i) - 1));
if (field == 2) {
base[i] += GST_VIDEO_FRAME_COMP_STRIDE (frame, i);
}
}
memcpy (y_rows, dec->idr_y, 16 * sizeof (gpointer));
memcpy (u_rows, dec->idr_u, 16 * sizeof (gpointer));
memcpy (v_rows, dec->idr_v, 16 * sizeof (gpointer));
/* fill chroma components for grayscale */
if (comp == 1) {
GST_DEBUG_OBJECT (dec, "grayscale, filling chroma");
for (i = 0; i < 16; i++) {
memset (u_rows[i], GST_ROUND_UP_32 (width), 0x80);
memset (v_rows[i], GST_ROUND_UP_32 (width), 0x80);
}
}
for (i = 0; i < height; i += r_v * DCTSIZE) {
lines = jpeg_read_raw_data (&dec->cinfo, scanarray, r_v * DCTSIZE);
if (G_LIKELY (lines > 0)) {
for (j = 0, k = 0; j < (r_v * DCTSIZE); j += r_v, k++) {
if (G_LIKELY (base[0] <= last[0])) {
memcpy (base[0], y_rows[j], rowsize[0]);
base[0] += stride[0];
}
if (r_v == 2) {
if (G_LIKELY (base[0] <= last[0])) {
memcpy (base[0], y_rows[j + 1], rowsize[0]);
base[0] += stride[0];
}
}
if (G_LIKELY (base[1] <= last[1] && base[2] <= last[2])) {
if (r_h == 2) {
memcpy (base[1], u_rows[k], rowsize[1]);
memcpy (base[2], v_rows[k], rowsize[2]);
} else if (r_h == 1) {
hresamplecpy1 (base[1], u_rows[k], rowsize[1]);
hresamplecpy1 (base[2], v_rows[k], rowsize[2]);
} else {
/* FIXME: implement (at least we avoid crashing by doing nothing) */
}
}
if (r_v == 2 || (k & 1) != 0) {
base[1] += stride[1];
base[2] += stride[2];
}
}
} else {
GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
}
}
}
static GstFlowReturn
gst_jpeg_dec_decode_direct (GstJpegDec * dec, GstVideoFrame * frame,
guint field, guint num_fields)
{
guchar **line[3]; /* the jpeg line buffer */
guchar *y[4 * DCTSIZE] = { NULL, }; /* alloc enough for the lines */
guchar *u[4 * DCTSIZE] = { NULL, }; /* r_v will be <4 */
guchar *v[4 * DCTSIZE] = { NULL, };
gint i, j;
gint lines, v_samp[3];
guchar *base[3], *last[3];
gint stride[3];
guint height;
line[0] = y;
line[1] = u;
line[2] = v;
v_samp[0] = dec->cinfo.comp_info[0].v_samp_factor;
v_samp[1] = dec->cinfo.comp_info[1].v_samp_factor;
v_samp[2] = dec->cinfo.comp_info[2].v_samp_factor;
if (G_UNLIKELY (v_samp[0] > 2 || v_samp[1] > 2 || v_samp[2] > 2))
goto format_not_supported;
height = GST_VIDEO_FRAME_HEIGHT (frame);
for (i = 0; i < 3; i++) {
base[i] = GST_VIDEO_FRAME_COMP_DATA (frame, i);
stride[i] = GST_VIDEO_FRAME_COMP_STRIDE (frame, i) * num_fields;
/* make sure we don't make jpeglib write beyond our buffer,
* which might happen if (height % (r_v*DCTSIZE)) != 0 */
last[i] = base[i] + (GST_VIDEO_FRAME_COMP_STRIDE (frame, i) *
(GST_VIDEO_FRAME_COMP_HEIGHT (frame, i) - 1));
if (field == 2) {
base[i] += GST_VIDEO_FRAME_COMP_STRIDE (frame, i);
}
}
if (height % (v_samp[0] * DCTSIZE) && (dec->scratch_size < stride[0])) {
g_free (dec->scratch);
dec->scratch = g_malloc (stride[0]);
dec->scratch_size = stride[0];
}
/* let jpeglib decode directly into our final buffer */
GST_DEBUG_OBJECT (dec, "decoding directly into output buffer");
for (i = 0; i < height; i += v_samp[0] * DCTSIZE) {
for (j = 0; j < (v_samp[0] * DCTSIZE); ++j) {
/* Y */
line[0][j] = base[0] + (i + j) * stride[0];
if (G_UNLIKELY (line[0][j] > last[0]))
line[0][j] = dec->scratch;
/* U */
if (v_samp[1] == v_samp[0]) {
line[1][j] = base[1] + ((i + j) / 2) * stride[1];
} else if (j < (v_samp[1] * DCTSIZE)) {
line[1][j] = base[1] + ((i / 2) + j) * stride[1];
}
if (G_UNLIKELY (line[1][j] > last[1]))
line[1][j] = dec->scratch;
/* V */
if (v_samp[2] == v_samp[0]) {
line[2][j] = base[2] + ((i + j) / 2) * stride[2];
} else if (j < (v_samp[2] * DCTSIZE)) {
line[2][j] = base[2] + ((i / 2) + j) * stride[2];
}
if (G_UNLIKELY (line[2][j] > last[2]))
line[2][j] = dec->scratch;
}
lines = jpeg_read_raw_data (&dec->cinfo, line, v_samp[0] * DCTSIZE);
if (G_UNLIKELY (!lines)) {
GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
}
}
return GST_FLOW_OK;
format_not_supported:
{
gboolean ret = GST_FLOW_OK;
GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
(_("Failed to decode JPEG image")),
("Unsupported subsampling schema: v_samp factors: %u %u %u", v_samp[0],
v_samp[1], v_samp[2]), ret);
return ret;
}
}
static void
gst_jpeg_dec_negotiate (GstJpegDec * dec, gint width, gint height, gint clrspc,
gboolean interlaced)
{
GstVideoCodecState *outstate;
GstVideoInfo *info;
GstVideoFormat format;
switch (clrspc) {
case JCS_RGB:
format = GST_VIDEO_FORMAT_RGB;
break;
case JCS_GRAYSCALE:
format = GST_VIDEO_FORMAT_GRAY8;
break;
default:
format = GST_VIDEO_FORMAT_I420;
break;
}
/* Compare to currently configured output state */
outstate = gst_video_decoder_get_output_state (GST_VIDEO_DECODER (dec));
if (outstate) {
info = &outstate->info;
if (width == GST_VIDEO_INFO_WIDTH (info) &&
height == GST_VIDEO_INFO_HEIGHT (info) &&
format == GST_VIDEO_INFO_FORMAT (info)) {
gst_video_codec_state_unref (outstate);
return;
}
gst_video_codec_state_unref (outstate);
}
outstate =
gst_video_decoder_set_output_state (GST_VIDEO_DECODER (dec), format,
width, height, dec->input_state);
switch (clrspc) {
case JCS_RGB:
case JCS_GRAYSCALE:
break;
default:
outstate->info.colorimetry.range = GST_VIDEO_COLOR_RANGE_0_255;
outstate->info.colorimetry.matrix = GST_VIDEO_COLOR_MATRIX_BT601;
outstate->info.colorimetry.transfer = GST_VIDEO_TRANSFER_UNKNOWN;
outstate->info.colorimetry.primaries = GST_VIDEO_COLOR_PRIMARIES_UNKNOWN;
break;
}
if (interlaced) {
outstate->info.interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
GST_VIDEO_INFO_FIELD_ORDER (&outstate->info) =
GST_VIDEO_FIELD_ORDER_TOP_FIELD_FIRST;
}
gst_video_codec_state_unref (outstate);
gst_video_decoder_negotiate (GST_VIDEO_DECODER (dec));
GST_DEBUG_OBJECT (dec, "max_v_samp_factor=%d", dec->cinfo.max_v_samp_factor);
GST_DEBUG_OBJECT (dec, "max_h_samp_factor=%d", dec->cinfo.max_h_samp_factor);
}
static GstFlowReturn
gst_jpeg_dec_prepare_decode (GstJpegDec * dec)
{
G_GNUC_UNUSED GstFlowReturn ret;
guint r_h, r_v, hdr_ok;
/* read header */
hdr_ok = jpeg_read_header (&dec->cinfo, TRUE);
if (G_UNLIKELY (hdr_ok != JPEG_HEADER_OK)) {
GST_WARNING_OBJECT (dec, "reading the header failed, %d", hdr_ok);
}
GST_LOG_OBJECT (dec, "num_components=%d", dec->cinfo.num_components);
GST_LOG_OBJECT (dec, "jpeg_color_space=%d", dec->cinfo.jpeg_color_space);
if (!dec->cinfo.num_components || !dec->cinfo.comp_info)
goto components_not_supported;
r_h = dec->cinfo.comp_info[0].h_samp_factor;
r_v = dec->cinfo.comp_info[0].v_samp_factor;
GST_LOG_OBJECT (dec, "r_h = %d, r_v = %d", r_h, r_v);
if (dec->cinfo.num_components > 3)
goto components_not_supported;
/* verify color space expectation to avoid going *boom* or bogus output */
if (dec->cinfo.jpeg_color_space != JCS_YCbCr &&
dec->cinfo.jpeg_color_space != JCS_GRAYSCALE &&
dec->cinfo.jpeg_color_space != JCS_RGB)
goto unsupported_colorspace;
#ifndef GST_DISABLE_GST_DEBUG
{
gint i;
for (i = 0; i < dec->cinfo.num_components; ++i) {
GST_LOG_OBJECT (dec, "[%d] h_samp_factor=%d, v_samp_factor=%d, cid=%d",
i, dec->cinfo.comp_info[i].h_samp_factor,
dec->cinfo.comp_info[i].v_samp_factor,
dec->cinfo.comp_info[i].component_id);
}
}
#endif
/* prepare for raw output */
dec->cinfo.do_fancy_upsampling = FALSE;
dec->cinfo.do_block_smoothing = FALSE;
dec->cinfo.out_color_space = dec->cinfo.jpeg_color_space;
dec->cinfo.dct_method = dec->idct_method;
dec->cinfo.raw_data_out = TRUE;
GST_LOG_OBJECT (dec, "starting decompress");
guarantee_huff_tables (&dec->cinfo);
if (!jpeg_start_decompress (&dec->cinfo)) {
GST_WARNING_OBJECT (dec, "failed to start decompression cycle");
}
/* sanity checks to get safe and reasonable output */
switch (dec->cinfo.jpeg_color_space) {
case JCS_GRAYSCALE:
if (dec->cinfo.num_components != 1)
goto invalid_yuvrgbgrayscale;
break;
case JCS_RGB:
if (dec->cinfo.num_components != 3 || dec->cinfo.max_v_samp_factor > 1 ||
dec->cinfo.max_h_samp_factor > 1)
goto invalid_yuvrgbgrayscale;
break;
case JCS_YCbCr:
if (dec->cinfo.num_components != 3 ||
r_v > 2 || r_v < dec->cinfo.comp_info[0].v_samp_factor ||
r_v < dec->cinfo.comp_info[1].v_samp_factor ||
r_h < dec->cinfo.comp_info[0].h_samp_factor ||
r_h < dec->cinfo.comp_info[1].h_samp_factor)
goto invalid_yuvrgbgrayscale;
break;
default:
g_assert_not_reached ();
break;
}
if (G_UNLIKELY (dec->cinfo.output_width < MIN_WIDTH ||
dec->cinfo.output_width > MAX_WIDTH ||
dec->cinfo.output_height < MIN_HEIGHT ||
dec->cinfo.output_height > MAX_HEIGHT))
goto wrong_size;
return GST_FLOW_OK;
/* ERRORS */
wrong_size:
{
ret = GST_FLOW_ERROR;
GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
(_("Failed to decode JPEG image")),
("Picture is too small or too big (%ux%u)", dec->cinfo.output_width,
dec->cinfo.output_height), ret);
return GST_FLOW_ERROR;
}
components_not_supported:
{
ret = GST_FLOW_ERROR;
GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
(_("Failed to decode JPEG image")),
("number of components not supported: %d (max 3)",
dec->cinfo.num_components), ret);
jpeg_abort_decompress (&dec->cinfo);
return GST_FLOW_ERROR;
}
unsupported_colorspace:
{
ret = GST_FLOW_ERROR;
GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
(_("Failed to decode JPEG image")),
("Picture has unknown or unsupported colourspace"), ret);
jpeg_abort_decompress (&dec->cinfo);
return GST_FLOW_ERROR;
}
invalid_yuvrgbgrayscale:
{
ret = GST_FLOW_ERROR;
GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
(_("Failed to decode JPEG image")),
("Picture is corrupt or unhandled YUV/RGB/grayscale layout"), ret);
jpeg_abort_decompress (&dec->cinfo);
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_jpeg_dec_decode (GstJpegDec * dec, GstVideoFrame * vframe, guint width,
guint height, guint field, guint num_fields)
{
GstFlowReturn ret = GST_FLOW_OK;
if (dec->cinfo.jpeg_color_space == JCS_RGB) {
gst_jpeg_dec_decode_rgb (dec, vframe, field, num_fields);
} else if (dec->cinfo.jpeg_color_space == JCS_GRAYSCALE) {
gst_jpeg_dec_decode_grayscale (dec, vframe, field, num_fields);
} else {
GST_LOG_OBJECT (dec, "decompressing (required scanline buffer height = %u)",
dec->cinfo.rec_outbuf_height);
/* For some widths jpeglib requires more horizontal padding than I420
* provides. In those cases we need to decode into separate buffers and then
* copy over the data into our final picture buffer, otherwise jpeglib might
* write over the end of a line into the beginning of the next line,
* resulting in blocky artifacts on the left side of the picture. */
if (G_UNLIKELY (width % (dec->cinfo.max_h_samp_factor * DCTSIZE) != 0
|| dec->cinfo.comp_info[0].h_samp_factor != 2
|| dec->cinfo.comp_info[1].h_samp_factor != 1
|| dec->cinfo.comp_info[2].h_samp_factor != 1)) {
GST_CAT_LOG_OBJECT (GST_CAT_PERFORMANCE, dec,
"indirect decoding using extra buffer copy");
gst_jpeg_dec_decode_indirect (dec, vframe,
dec->cinfo.comp_info[0].v_samp_factor,
dec->cinfo.comp_info[0].h_samp_factor, dec->cinfo.num_components,
field, num_fields);
} else {
ret = gst_jpeg_dec_decode_direct (dec, vframe, field, num_fields);
}
}
GST_LOG_OBJECT (dec, "decompressing finished: %s", gst_flow_get_name (ret));
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
jpeg_abort_decompress (&dec->cinfo);
} else {
jpeg_finish_decompress (&dec->cinfo);
}
return ret;
}
static GstFlowReturn
gst_jpeg_dec_handle_frame (GstVideoDecoder * bdec, GstVideoCodecFrame * frame)
{
GstFlowReturn ret = GST_FLOW_OK;
GstJpegDec *dec = (GstJpegDec *) bdec;
GstVideoFrame vframe;
gint num_fields; /* number of fields (1 or 2) */
gint output_height; /* height of output image (one or two fields) */
gint height; /* height of current frame (whole image or a field) */
gint width;
guint code;
gboolean need_unmap = TRUE;
GstVideoCodecState *state = NULL;
gboolean release_frame = TRUE;
gboolean has_eoi;
guint8 *data;
gsize nbytes;
gst_buffer_map (frame->input_buffer, &dec->current_frame_map, GST_MAP_READ);
data = dec->current_frame_map.data;
nbytes = dec->current_frame_map.size;
has_eoi = ((data[nbytes - 2] != 0xff) || (data[nbytes - 1] != 0xd9));
/* some cameras fail to send an end-of-image marker (EOI),
* add it if that is the case. */
if (!has_eoi) {
GstMapInfo map;
GstBuffer *eoibuf = gst_buffer_new_and_alloc (2);
/* unmap, will add EOI and remap at the end */
gst_buffer_unmap (frame->input_buffer, &dec->current_frame_map);
gst_buffer_map (eoibuf, &map, GST_MAP_WRITE);
map.data[0] = 0xff;
map.data[1] = 0xd9;
gst_buffer_unmap (eoibuf, &map);
/* append to input buffer, and remap */
frame->input_buffer = gst_buffer_append (frame->input_buffer, eoibuf);
gst_buffer_map (frame->input_buffer, &dec->current_frame_map, GST_MAP_READ);
GST_DEBUG ("fixup EOI marker added");
}
dec->current_frame = frame;
dec->cinfo.src->next_input_byte = dec->current_frame_map.data;
dec->cinfo.src->bytes_in_buffer = dec->current_frame_map.size;
if (setjmp (dec->jerr.setjmp_buffer)) {
code = dec->jerr.pub.msg_code;
if (code == JERR_INPUT_EOF) {
GST_DEBUG ("jpeg input EOF error, we probably need more data");
goto need_more_data;
}
goto decode_error;
}
/* read header and check values */
ret = gst_jpeg_dec_prepare_decode (dec);
if (G_UNLIKELY (ret == GST_FLOW_ERROR))
goto done;
width = dec->cinfo.output_width;
height = dec->cinfo.output_height;
/* is it interlaced MJPEG? (we really don't want to scan the jpeg data
* to see if there are two SOF markers in the packet to detect this) */
if (gst_video_decoder_get_packetized (bdec) &&
dec->input_state &&
dec->input_state->info.height > height &&
dec->input_state->info.height <= (height * 2)
&& dec->input_state->info.width == width) {
GST_LOG_OBJECT (dec,
"looks like an interlaced image: "
"input width/height of %dx%d with JPEG frame width/height of %dx%d",
dec->input_state->info.width, dec->input_state->info.height, width,
height);
output_height = dec->input_state->info.height;
height = dec->input_state->info.height / 2;
num_fields = 2;
GST_LOG_OBJECT (dec, "field height=%d", height);
} else {
output_height = height;
num_fields = 1;
}
gst_jpeg_dec_negotiate (dec, width, output_height,
dec->cinfo.jpeg_color_space, num_fields == 2);
state = gst_video_decoder_get_output_state (bdec);
ret = gst_video_decoder_allocate_output_frame (bdec, frame);
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto alloc_failed;
if (!gst_video_frame_map (&vframe, &state->info, frame->output_buffer,
GST_MAP_READWRITE))
goto alloc_failed;
if (setjmp (dec->jerr.setjmp_buffer)) {
code = dec->jerr.pub.msg_code;
gst_video_frame_unmap (&vframe);
goto decode_error;
}
GST_LOG_OBJECT (dec, "width %d, height %d, fields %d", width, output_height,
num_fields);
ret = gst_jpeg_dec_decode (dec, &vframe, width, height, 1, num_fields);
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
gst_video_frame_unmap (&vframe);
goto decode_failed;
}
if (setjmp (dec->jerr.setjmp_buffer)) {
code = dec->jerr.pub.msg_code;
gst_video_frame_unmap (&vframe);
goto decode_error;
}
/* decode second field if there is one */
if (num_fields == 2) {
GstVideoFormat field2_format;
/* Checked above before setting num_fields to 2 */
g_assert (dec->input_state != NULL);
/* skip any chunk or padding bytes before the next SOI marker; both fields
* are in one single buffer here, so direct access should be fine here */
while (dec->jsrc.pub.bytes_in_buffer > 2 &&
GST_READ_UINT16_BE (dec->jsrc.pub.next_input_byte) != 0xffd8) {
--dec->jsrc.pub.bytes_in_buffer;
++dec->jsrc.pub.next_input_byte;
}
if (gst_jpeg_dec_prepare_decode (dec) != GST_FLOW_OK) {
GST_WARNING_OBJECT (dec, "problem reading jpeg header of 2nd field");
/* FIXME: post a warning message here? */
gst_video_frame_unmap (&vframe);
goto decode_failed;
}
/* check if format has changed for the second field */
switch (dec->cinfo.jpeg_color_space) {
case JCS_RGB:
field2_format = GST_VIDEO_FORMAT_RGB;
break;
case JCS_GRAYSCALE:
field2_format = GST_VIDEO_FORMAT_GRAY8;
break;
default:
field2_format = GST_VIDEO_FORMAT_I420;
break;
}
GST_LOG_OBJECT (dec,
"got for second field of interlaced image: "
"input width/height of %dx%d with JPEG frame width/height of %dx%d",
dec->input_state->info.width, dec->input_state->info.height,
dec->cinfo.output_width, dec->cinfo.output_height);
if (dec->cinfo.output_width != GST_VIDEO_INFO_WIDTH (&state->info) ||
GST_VIDEO_INFO_HEIGHT (&state->info) <= dec->cinfo.output_height ||
GST_VIDEO_INFO_HEIGHT (&state->info) > (dec->cinfo.output_height * 2) ||
field2_format != GST_VIDEO_INFO_FORMAT (&state->info)) {
GST_WARNING_OBJECT (dec, "second field has different format than first");
gst_video_frame_unmap (&vframe);
goto decode_failed;
}
ret = gst_jpeg_dec_decode (dec, &vframe, width, height, 2, 2);
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
gst_video_frame_unmap (&vframe);
goto decode_failed;
}
}
gst_video_frame_unmap (&vframe);
gst_buffer_unmap (frame->input_buffer, &dec->current_frame_map);
ret = gst_video_decoder_finish_frame (bdec, frame);
release_frame = FALSE;
need_unmap = FALSE;
done:
exit:
if (need_unmap)
gst_buffer_unmap (frame->input_buffer, &dec->current_frame_map);
if (release_frame)
gst_video_decoder_release_frame (bdec, frame);
if (state)
gst_video_codec_state_unref (state);
return ret;
/* special cases */
need_more_data:
{
GST_LOG_OBJECT (dec, "we need more data");
ret = GST_FLOW_OK;
goto exit;
}
/* ERRORS */
decode_error:
{
gchar err_msg[JMSG_LENGTH_MAX];
dec->jerr.pub.format_message ((j_common_ptr) (&dec->cinfo), err_msg);
GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
(_("Failed to decode JPEG image")), ("Decode error #%u: %s", code,
err_msg), ret);
gst_buffer_unmap (frame->input_buffer, &dec->current_frame_map);
gst_video_decoder_drop_frame (bdec, frame);
release_frame = FALSE;
need_unmap = FALSE;
jpeg_abort_decompress (&dec->cinfo);
goto done;
}
decode_failed:
{
/* already posted an error message */
goto done;
}
alloc_failed:
{
const gchar *reason;
reason = gst_flow_get_name (ret);
GST_DEBUG_OBJECT (dec, "failed to alloc buffer, reason %s", reason);
/* Reset for next time */
jpeg_abort_decompress (&dec->cinfo);
if (ret != GST_FLOW_EOS && ret != GST_FLOW_FLUSHING &&
ret != GST_FLOW_NOT_LINKED) {
GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
(_("Failed to decode JPEG image")),
("Buffer allocation failed, reason: %s", reason), ret);
jpeg_abort_decompress (&dec->cinfo);
}
goto exit;
}
}
static gboolean
gst_jpeg_dec_decide_allocation (GstVideoDecoder * bdec, GstQuery * query)
{
GstBufferPool *pool = NULL;
GstStructure *config;
if (!GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation (bdec, query))
return FALSE;
if (gst_query_get_n_allocation_pools (query) > 0)
gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
if (pool == NULL)
return FALSE;
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;
}
static gboolean
gst_jpeg_dec_sink_event (GstVideoDecoder * bdec, GstEvent * event)
{
const GstSegment *segment;
if (GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT)
goto done;
gst_event_parse_segment (event, &segment);
if (segment->format == GST_FORMAT_TIME)
gst_video_decoder_set_packetized (bdec, TRUE);
else
gst_video_decoder_set_packetized (bdec, FALSE);
done:
return GST_VIDEO_DECODER_CLASS (parent_class)->sink_event (bdec, event);
}
static gboolean
gst_jpeg_dec_start (GstVideoDecoder * bdec)
{
GstJpegDec *dec = (GstJpegDec *) bdec;
dec->saw_header = FALSE;
dec->parse_entropy_len = 0;
dec->parse_resync = FALSE;
gst_video_decoder_set_packetized (bdec, FALSE);
return TRUE;
}
static gboolean
gst_jpeg_dec_flush (GstVideoDecoder * bdec)
{
GstJpegDec *dec = (GstJpegDec *) bdec;
jpeg_abort_decompress (&dec->cinfo);
dec->parse_entropy_len = 0;
dec->parse_resync = FALSE;
dec->saw_header = FALSE;
return TRUE;
}
static void
gst_jpeg_dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstJpegDec *dec;
dec = GST_JPEG_DEC (object);
switch (prop_id) {
case PROP_IDCT_METHOD:
dec->idct_method = g_value_get_enum (value);
break;
#ifndef GST_REMOVE_DEPRECATED
case PROP_MAX_ERRORS:
g_atomic_int_set (&dec->max_errors, g_value_get_int (value));
break;
#endif
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_jpeg_dec_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstJpegDec *dec;
dec = GST_JPEG_DEC (object);
switch (prop_id) {
case PROP_IDCT_METHOD:
g_value_set_enum (value, dec->idct_method);
break;
#ifndef GST_REMOVE_DEPRECATED
case PROP_MAX_ERRORS:
g_value_set_int (value, g_atomic_int_get (&dec->max_errors));
break;
#endif
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_jpeg_dec_stop (GstVideoDecoder * bdec)
{
GstJpegDec *dec = (GstJpegDec *) bdec;
gst_jpeg_dec_free_buffers (dec);
g_free (dec->scratch);
dec->scratch = NULL;
dec->scratch_size = 0;
return TRUE;
}
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