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gstreamer/ext/jpeg/gstjpegdec.c
Thibault Saunier 0a6a62aa76 docs: Port all docstring to gtk-doc markdown
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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);
}
}
/* 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] = last[0];
/* 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] = last[1];
/* 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] = last[2];
}
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->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;
/* 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);
return TRUE;
}
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