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gstreamer/ext/jpeg/gstjpegdec.c
Tim-Philipp Müller addbc3c4ca jpegdec: add "max-errors" property to ignore decoding errors 
Add property to ignore decoding errors. Default is to ignore a few
decoding errors if the input is packetized, but error out immediately
if the input is not packetized.

Ignoring errors for packetized input most likely doesn't work
properly yet, so don't do that for now.

https://bugzilla.gnome.org/show_bug.cgi?id=623063
2010-12-11 20:36:45 +00:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2009> Tim-Philipp Müller <tim centricular net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-jpegdec
*
* Decodes jpeg images.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v v4l2src ! jpegddec ! ffmpegcolorspace ! xvimagesink
* ]| The above pipeline reads a motion JPEG stream from a v4l2 camera
* and renders it to the screen.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstjpegdec.h"
#include "gstjpeg.h"
#include <gst/video/video.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_YUV ("I420") "; "
GST_VIDEO_CAPS_RGB "; " GST_VIDEO_CAPS_BGR "; "
GST_VIDEO_CAPS_RGBx "; " GST_VIDEO_CAPS_xRGB "; "
GST_VIDEO_CAPS_BGRx "; " GST_VIDEO_CAPS_xBGR "; "
GST_VIDEO_CAPS_GRAY8)
);
/* *INDENT-ON* */
static GstStaticPadTemplate gst_jpeg_dec_sink_pad_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("image/jpeg, "
"width = (int) [ " G_STRINGIFY (MIN_WIDTH) ", " G_STRINGIFY (MAX_WIDTH)
" ], " "height = (int) [ " G_STRINGIFY (MIN_HEIGHT) ", "
G_STRINGIFY (MAX_HEIGHT) " ], " "framerate = (fraction) [ 0/1, MAX ]")
);
GST_DEBUG_CATEGORY_STATIC (jpeg_dec_debug);
#define GST_CAT_DEFAULT jpeg_dec_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_PERFORMANCE);
/* These macros are adapted from videotestsrc.c
* and/or gst-plugins/gst/games/gstvideoimage.c */
#define I420_Y_ROWSTRIDE(width) (GST_ROUND_UP_4(width))
#define I420_U_ROWSTRIDE(width) (GST_ROUND_UP_8(width)/2)
#define I420_V_ROWSTRIDE(width) ((GST_ROUND_UP_8(I420_Y_ROWSTRIDE(width)))/2)
#define I420_Y_OFFSET(w,h) (0)
#define I420_U_OFFSET(w,h) (I420_Y_OFFSET(w,h)+(I420_Y_ROWSTRIDE(w)*GST_ROUND_UP_2(h)))
#define I420_V_OFFSET(w,h) (I420_U_OFFSET(w,h)+(I420_U_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2))
#define I420_SIZE(w,h) (I420_V_OFFSET(w,h)+(I420_V_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2))
static GstElementClass *parent_class; /* NULL */
static void gst_jpeg_dec_base_init (gpointer g_class);
static void gst_jpeg_dec_class_init (GstJpegDecClass * klass);
static void gst_jpeg_dec_init (GstJpegDec * jpegdec);
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 GstFlowReturn gst_jpeg_dec_chain (GstPad * pad, GstBuffer * buffer);
static gboolean gst_jpeg_dec_setcaps (GstPad * pad, GstCaps * caps);
static gboolean gst_jpeg_dec_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_jpeg_dec_src_event (GstPad * pad, GstEvent * event);
static GstStateChangeReturn gst_jpeg_dec_change_state (GstElement * element,
GstStateChange transition);
static void gst_jpeg_dec_update_qos (GstJpegDec * dec, gdouble proportion,
GstClockTimeDiff diff, GstClockTime ts);
static void gst_jpeg_dec_reset_qos (GstJpegDec * dec);
static void gst_jpeg_dec_read_qos (GstJpegDec * dec, gdouble * proportion,
GstClockTime * time);
GType
gst_jpeg_dec_get_type (void)
{
static GType type = 0;
if (!type) {
static const GTypeInfo jpeg_dec_info = {
sizeof (GstJpegDecClass),
(GBaseInitFunc) gst_jpeg_dec_base_init,
NULL,
(GClassInitFunc) gst_jpeg_dec_class_init,
NULL,
NULL,
sizeof (GstJpegDec),
0,
(GInstanceInitFunc) gst_jpeg_dec_init,
};
type = g_type_register_static (GST_TYPE_ELEMENT, "GstJpegDec",
&jpeg_dec_info, 0);
}
return type;
}
static void
gst_jpeg_dec_finalize (GObject * object)
{
GstJpegDec *dec = GST_JPEG_DEC (object);
jpeg_destroy_decompress (&dec->cinfo);
g_object_unref (dec->adapter);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_jpeg_dec_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_jpeg_dec_src_pad_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_jpeg_dec_sink_pad_template));
gst_element_class_set_details_simple (element_class, "JPEG image decoder",
"Codec/Decoder/Image",
"Decode images from JPEG format", "Wim Taymans <wim@fluendo.com>");
}
static void
gst_jpeg_dec_class_init (GstJpegDecClass * klass)
{
GstElementClass *gstelement_class;
GObjectClass *gobject_class;
gstelement_class = (GstElementClass *) klass;
gobject_class = (GObjectClass *) 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.)
*
* Since: 0.10.27
**/
g_object_class_install_property (gobject_class, PROP_MAX_ERRORS,
g_param_spec_int ("max-errors", "Maximum Consecutive Decoding Errors",
"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));
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_jpeg_dec_change_state);
GST_DEBUG_CATEGORY_INIT (jpeg_dec_debug, "jpegdec", 0, "JPEG decoder");
GST_DEBUG_CATEGORY_GET (GST_CAT_PERFORMANCE, "GST_PERFORMANCE");
}
static void
gst_jpeg_dec_clear_error (GstJpegDec * dec)
{
g_free (dec->error_msg);
dec->error_msg = NULL;
dec->error_line = 0;
dec->error_func = NULL;
}
static void
gst_jpeg_dec_set_error_va (GstJpegDec * dec, const gchar * func, gint line,
const gchar * debug_msg_format, va_list args)
{
#ifndef GST_DISABLE_GST_DEBUG
gst_debug_log_valist (GST_CAT_DEFAULT, GST_LEVEL_WARNING, __FILE__, func,
line, (GObject *) dec, debug_msg_format, args);
#endif
g_free (dec->error_msg);
if (debug_msg_format)
dec->error_msg = g_strdup_vprintf (debug_msg_format, args);
else
dec->error_msg = NULL;
dec->error_line = line;
dec->error_func = func;
}
static void
gst_jpeg_dec_set_error (GstJpegDec * dec, const gchar * func, gint line,
const gchar * debug_msg_format, ...)
{
va_list va;
va_start (va, debug_msg_format);
gst_jpeg_dec_set_error_va (dec, func, line, debug_msg_format, va);
va_end (va);
}
static GstFlowReturn
gst_jpeg_dec_post_error_or_warning (GstJpegDec * dec)
{
GstFlowReturn ret;
int max_errors;
++dec->error_count;
max_errors = g_atomic_int_get (&dec->max_errors);
if (max_errors < 0) {
ret = GST_FLOW_OK;
} else if (max_errors == 0) {
/* FIXME: do something more clever in "automatic mode" */
if (dec->packetized) {
ret = (dec->error_count < 3) ? GST_FLOW_OK : GST_FLOW_ERROR;
} else {
ret = GST_FLOW_ERROR;
}
} else {
ret = (dec->error_count < max_errors) ? GST_FLOW_OK : GST_FLOW_ERROR;
}
GST_INFO_OBJECT (dec, "decoding error %d/%d (%s)", dec->error_count,
max_errors, (ret == GST_FLOW_OK) ? "ignoring error" : "erroring out");
gst_element_message_full (GST_ELEMENT (dec),
(ret == GST_FLOW_OK) ? GST_MESSAGE_WARNING : GST_MESSAGE_ERROR,
GST_STREAM_ERROR, GST_STREAM_ERROR_DECODE,
g_strdup (_("Failed to decode JPEG image")), dec->error_msg,
__FILE__, dec->error_func, dec->error_line);
dec->error_msg = NULL;
gst_jpeg_dec_clear_error (dec);
return ret;
}
static boolean
gst_jpeg_dec_fill_input_buffer (j_decompress_ptr cinfo)
{
GstJpegDec *dec;
guint av;
dec = CINFO_GET_JPEGDEC (cinfo);
g_return_val_if_fail (dec != NULL, FALSE);
av = gst_adapter_available_fast (dec->adapter);
GST_DEBUG_OBJECT (dec, "fill_input_buffer: fast av=%u, remaining=%u", av,
dec->rem_img_len);
if (av == 0) {
GST_DEBUG_OBJECT (dec, "Out of data");
return FALSE;
}
if (dec->rem_img_len < av)
av = dec->rem_img_len;
dec->rem_img_len -= av;
g_free (dec->cur_buf);
dec->cur_buf = gst_adapter_take (dec->adapter, av);
cinfo->src->next_input_byte = dec->cur_buf;
cinfo->src->bytes_in_buffer = av;
return TRUE;
}
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;
} else if (num_bytes > 0) {
gint available;
num_bytes -= cinfo->src->bytes_in_buffer;
cinfo->src->next_input_byte += (size_t) cinfo->src->bytes_in_buffer;
cinfo->src->bytes_in_buffer = 0;
available = gst_adapter_available (dec->adapter);
if (available < num_bytes || available < dec->rem_img_len) {
GST_WARNING_OBJECT (dec, "Less bytes to skip than available in the "
"adapter or the remaining image length %ld < %d or %u",
num_bytes, available, dec->rem_img_len);
}
num_bytes = MIN (MIN (num_bytes, available), dec->rem_img_len);
gst_adapter_flush (dec->adapter, num_bytes);
dec->rem_img_len -= 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");
/* create the sink and src pads */
dec->sinkpad =
gst_pad_new_from_static_template (&gst_jpeg_dec_sink_pad_template,
"sink");
gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
gst_pad_set_setcaps_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (gst_jpeg_dec_setcaps));
gst_pad_set_chain_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (gst_jpeg_dec_chain));
gst_pad_set_event_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (gst_jpeg_dec_sink_event));
dec->srcpad =
gst_pad_new_from_static_template (&gst_jpeg_dec_src_pad_template, "src");
gst_pad_set_event_function (dec->srcpad,
GST_DEBUG_FUNCPTR (gst_jpeg_dec_src_event));
gst_pad_use_fixed_caps (dec->srcpad);
gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
/* 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;
dec->adapter = gst_adapter_new ();
}
static gboolean
gst_jpeg_dec_ensure_header (GstJpegDec * dec)
{
gint av;
gint offset;
av = gst_adapter_available (dec->adapter);
/* we expect at least 4 bytes, first of which start marker */
offset = gst_adapter_masked_scan_uint32 (dec->adapter, 0xffffff00, 0xffd8ff00,
0, av);
if (G_UNLIKELY (offset < 0)) {
GST_DEBUG_OBJECT (dec, "No JPEG header in current buffer");
/* not found */
if (av > 4)
gst_adapter_flush (dec->adapter, av - 4);
return FALSE;
}
if (offset > 0) {
GST_LOG_OBJECT (dec, "Skipping %u bytes.", offset);
gst_adapter_flush (dec->adapter, offset);
}
GST_DEBUG_OBJECT (dec, "Found JPEG header");
return TRUE;
}
static inline gboolean
gst_jpeg_dec_parse_tag_has_entropy_segment (guint8 tag)
{
if (tag == 0xda || (tag >= 0xd0 && tag <= 0xd7))
return TRUE;
return FALSE;
}
/* returns image length in bytes if parsed successfully,
* otherwise 0 if more data needed,
* if < 0 the absolute value needs to be flushed */
static gint
gst_jpeg_dec_parse_image_data (GstJpegDec * dec)
{
guint size;
gboolean resync;
GstAdapter *adapter = dec->adapter;
gint offset, noffset;
size = gst_adapter_available (adapter);
/* we expect at least 4 bytes, first of which start marker */
if (gst_adapter_masked_scan_uint32 (adapter, 0xffff0000, 0xffd80000, 0, 4))
return 0;
GST_DEBUG ("Parsing jpeg image data (%u bytes)", size);
GST_DEBUG ("Parse state: offset=%d, resync=%d, entropy len=%d",
dec->parse_offset, dec->parse_resync, dec->parse_entropy_len);
/* offset is 2 less than actual offset;
* - adapter needs at least 4 bytes for scanning,
* - start and end marker ensure at least that much
*/
/* resume from state offset */
offset = dec->parse_offset;
while (1) {
guint frame_len;
guint32 value;
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->parse_resync = FALSE;
dec->parse_offset = 0;
return (offset + 4);
} else if (value == 0xd8) {
/* Skip this frame if we found another SOI marker */
GST_DEBUG ("0x%08x: SOI marker before EOI, skipping", offset + 2);
dec->parse_resync = FALSE;
dec->parse_offset = 0;
return -(offset + 2);
}
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", offset + 2);
noffset = offset + 2 + frame_len + dec->parse_entropy_len;
while (1) {
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);
}
offset += frame_len + 2;
}
/* EXITS */
need_more_data:
{
dec->parse_offset = offset;
dec->parse_resync = resync;
return 0;
}
}
/* 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_setcaps (GstPad * pad, GstCaps * caps)
{
GstStructure *s;
GstJpegDec *dec;
const GValue *framerate;
dec = GST_JPEG_DEC (GST_OBJECT_PARENT (pad));
s = gst_caps_get_structure (caps, 0);
if ((framerate = gst_structure_get_value (s, "framerate")) != NULL) {
dec->framerate_numerator = gst_value_get_fraction_numerator (framerate);
dec->framerate_denominator = gst_value_get_fraction_denominator (framerate);
dec->packetized = TRUE;
GST_DEBUG ("got framerate of %d/%d fps => packetized mode",
dec->framerate_numerator, dec->framerate_denominator);
}
/* do not extract width/height here. we do that in the chain
* function on a per-frame basis (including the line[] array
* setup) */
/* But we can take the framerate values and set them on the src pad */
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, guchar * base[1],
guint width, guint height, guint pstride, guint rstride)
{
guchar *rows[16];
guchar **scanarray[1] = { rows };
gint i, j, k;
gint lines;
GST_DEBUG_OBJECT (dec, "indirect decoding of grayscale");
if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
return;
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, guchar * base[3],
guint width, guint height, guint pstride, guint rstride)
{
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;
GST_DEBUG_OBJECT (dec, "indirect decoding of RGB");
if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
return;
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, guchar * base[3],
guchar * last[3], guint width, guint height, gint r_v, gint r_h, gint comp)
{
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;
GST_DEBUG_OBJECT (dec,
"unadvantageous width or r_h, taking slow route involving memcpy");
if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
return;
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], I420_Y_ROWSTRIDE (width));
base[0] += I420_Y_ROWSTRIDE (width);
}
if (r_v == 2) {
if (G_LIKELY (base[0] <= last[0])) {
memcpy (base[0], y_rows[j + 1], I420_Y_ROWSTRIDE (width));
base[0] += I420_Y_ROWSTRIDE (width);
}
}
if (G_LIKELY (base[1] <= last[1] && base[2] <= last[2])) {
if (r_h == 2) {
memcpy (base[1], u_rows[k], I420_U_ROWSTRIDE (width));
memcpy (base[2], v_rows[k], I420_V_ROWSTRIDE (width));
} else if (r_h == 1) {
hresamplecpy1 (base[1], u_rows[k], I420_U_ROWSTRIDE (width));
hresamplecpy1 (base[2], v_rows[k], I420_V_ROWSTRIDE (width));
} else {
/* FIXME: implement (at least we avoid crashing by doing nothing) */
}
}
if (r_v == 2 || (k & 1) != 0) {
base[1] += I420_U_ROWSTRIDE (width);
base[2] += I420_V_ROWSTRIDE (width);
}
}
} else {
GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
}
}
}
#ifndef GST_DISABLE_GST_DEBUG
static inline void
dump_lines (guchar * base[3], guchar ** line[3], int v_samp0, int width)
{
int j;
for (j = 0; j < (v_samp0 * DCTSIZE); ++j) {
GST_LOG ("[%02d] %5d %5d %5d", j,
(line[0][j] >= base[0]) ?
(int) (line[0][j] - base[0]) / I420_Y_ROWSTRIDE (width) : -1,
(line[1][j] >= base[1]) ?
(int) (line[1][j] - base[1]) / I420_U_ROWSTRIDE (width) : -1,
(line[2][j] >= base[2]) ?
(int) (line[2][j] - base[2]) / I420_V_ROWSTRIDE (width) : -1);
}
}
#endif
static GstFlowReturn
gst_jpeg_dec_decode_direct (GstJpegDec * dec, guchar * base[3],
guchar * last[3], guint width, guint height)
{
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];
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;
/* 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) * I420_Y_ROWSTRIDE (width);
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) * I420_U_ROWSTRIDE (width);
} else if (j < (v_samp[1] * DCTSIZE)) {
line[1][j] = base[1] + ((i / 2) + j) * I420_U_ROWSTRIDE (width);
}
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) * I420_V_ROWSTRIDE (width);
} else if (j < (v_samp[2] * DCTSIZE)) {
line[2][j] = base[2] + ((i / 2) + j) * I420_V_ROWSTRIDE (width);
}
if (G_UNLIKELY (line[2][j] > last[2]))
line[2][j] = last[2];
}
/* dump_lines (base, line, v_samp[0], width); */
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:
{
gst_jpeg_dec_set_error (dec, GST_FUNCTION, __LINE__,
"Unsupported subsampling schema: v_samp factors: %u %u %u",
v_samp[0], v_samp[1], v_samp[2]);
return GST_FLOW_ERROR;
}
}
static void
gst_jpeg_dec_update_qos (GstJpegDec * dec, gdouble proportion,
GstClockTimeDiff diff, GstClockTime ts)
{
GST_OBJECT_LOCK (dec);
dec->proportion = proportion;
if (G_LIKELY (ts != GST_CLOCK_TIME_NONE)) {
if (G_UNLIKELY (diff > 0))
dec->earliest_time = ts + 2 * diff + dec->qos_duration;
else
dec->earliest_time = ts + diff;
} else {
dec->earliest_time = GST_CLOCK_TIME_NONE;
}
GST_OBJECT_UNLOCK (dec);
}
static void
gst_jpeg_dec_reset_qos (GstJpegDec * dec)
{
gst_jpeg_dec_update_qos (dec, 0.5, 0, GST_CLOCK_TIME_NONE);
}
static void
gst_jpeg_dec_read_qos (GstJpegDec * dec, gdouble * proportion,
GstClockTime * time)
{
GST_OBJECT_LOCK (dec);
*proportion = dec->proportion;
*time = dec->earliest_time;
GST_OBJECT_UNLOCK (dec);
}
/* Perform qos calculations before decoding the next frame. Returns TRUE if the
* frame should be decoded, FALSE if the frame can be dropped entirely */
static gboolean
gst_jpeg_dec_do_qos (GstJpegDec * dec, GstClockTime timestamp)
{
GstClockTime qostime, earliest_time;
gdouble proportion;
/* no timestamp, can't do QoS => decode frame */
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (timestamp))) {
GST_LOG_OBJECT (dec, "invalid timestamp, can't do QoS, decode frame");
return TRUE;
}
/* get latest QoS observation values */
gst_jpeg_dec_read_qos (dec, &proportion, &earliest_time);
/* skip qos if we have no observation (yet) => decode frame */
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (earliest_time))) {
GST_LOG_OBJECT (dec, "no observation yet, decode frame");
return TRUE;
}
/* qos is done on running time */
qostime = gst_segment_to_running_time (&dec->segment, GST_FORMAT_TIME,
timestamp);
/* see how our next timestamp relates to the latest qos timestamp */
GST_LOG_OBJECT (dec, "qostime %" GST_TIME_FORMAT ", earliest %"
GST_TIME_FORMAT, GST_TIME_ARGS (qostime), GST_TIME_ARGS (earliest_time));
if (qostime != GST_CLOCK_TIME_NONE && qostime <= earliest_time) {
GST_DEBUG_OBJECT (dec, "we are late, drop frame");
return FALSE;
}
GST_LOG_OBJECT (dec, "decode frame");
return TRUE;
}
static void
gst_jpeg_dec_negotiate (GstJpegDec * dec, gint width, gint height, gint clrspc)
{
GstCaps *caps;
GstVideoFormat format;
if (G_UNLIKELY (width == dec->caps_width && height == dec->caps_height &&
dec->framerate_numerator == dec->caps_framerate_numerator &&
dec->framerate_denominator == dec->caps_framerate_denominator &&
clrspc == dec->clrspc))
return;
/* framerate == 0/1 is a still frame */
if (dec->framerate_denominator == 0) {
dec->framerate_numerator = 0;
dec->framerate_denominator = 1;
}
/* calculate or assume an average frame duration for QoS purposes */
GST_OBJECT_LOCK (dec);
if (dec->framerate_numerator != 0) {
dec->qos_duration = gst_util_uint64_scale (GST_SECOND,
dec->framerate_denominator, dec->framerate_numerator);
} else {
/* if not set just use 25fps */
dec->qos_duration = gst_util_uint64_scale (GST_SECOND, 1, 25);
}
GST_OBJECT_UNLOCK (dec);
if (dec->cinfo.jpeg_color_space == JCS_RGB) {
gint i;
GstCaps *allowed_caps;
GST_DEBUG_OBJECT (dec, "selecting RGB format");
/* retrieve allowed caps, and find the first one that reasonably maps
* to the parameters of the colourspace */
caps = gst_pad_get_allowed_caps (dec->srcpad);
if (!caps) {
GST_DEBUG_OBJECT (dec, "... but no peer, using template caps");
/* need to copy because get_allowed_caps returns a ref,
* and get_pad_template_caps doesn't */
caps = gst_caps_copy (gst_pad_get_pad_template_caps (dec->srcpad));
}
/* avoid lists of fourcc, etc */
allowed_caps = gst_caps_normalize (caps);
gst_caps_unref (caps);
caps = NULL;
GST_LOG_OBJECT (dec, "allowed source caps %" GST_PTR_FORMAT, allowed_caps);
for (i = 0; i < gst_caps_get_size (allowed_caps); i++) {
if (caps)
gst_caps_unref (caps);
caps = gst_caps_copy_nth (allowed_caps, i);
/* sigh, ds and _parse_caps need fixed caps for parsing, fixate */
gst_pad_fixate_caps (dec->srcpad, caps);
GST_LOG_OBJECT (dec, "checking caps %" GST_PTR_FORMAT, caps);
if (!gst_video_format_parse_caps (caps, &format, NULL, NULL))
continue;
/* we'll settle for the first (preferred) downstream rgb format */
if (gst_video_format_is_rgb (format))
break;
/* default fall-back */
format = GST_VIDEO_FORMAT_RGB;
}
if (caps)
gst_caps_unref (caps);
gst_caps_unref (allowed_caps);
caps = gst_video_format_new_caps (format, width, height,
dec->framerate_numerator, dec->framerate_denominator, 1, 1);
dec->outsize = gst_video_format_get_size (format, width, height);
/* some format info */
dec->offset[0] =
gst_video_format_get_component_offset (format, 0, width, height);
dec->offset[1] =
gst_video_format_get_component_offset (format, 1, width, height);
dec->offset[2] =
gst_video_format_get_component_offset (format, 2, width, height);
/* equal for all components */
dec->stride = gst_video_format_get_row_stride (format, 0, width);
dec->inc = gst_video_format_get_pixel_stride (format, 0);
} else if (dec->cinfo.jpeg_color_space == JCS_GRAYSCALE) {
/* TODO is anything else then 8bit supported in jpeg? */
format = GST_VIDEO_FORMAT_GRAY8;
caps = gst_video_format_new_caps (format, width, height,
dec->framerate_numerator, dec->framerate_denominator, 1, 1);
dec->outsize = gst_video_format_get_size (format, width, height);
dec->offset[0] =
gst_video_format_get_component_offset (format, 0, width, height);
dec->stride = gst_video_format_get_row_stride (format, 0, width);
dec->inc = gst_video_format_get_pixel_stride (format, 0);
} else {
/* go for plain and simple I420 */
/* TODO other YUV cases ? */
caps = gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('I', '4', '2', '0'),
"width", G_TYPE_INT, width, "height", G_TYPE_INT, height,
"framerate", GST_TYPE_FRACTION, dec->framerate_numerator,
dec->framerate_denominator, NULL);
dec->outsize = I420_SIZE (width, height);
}
GST_DEBUG_OBJECT (dec, "setting caps %" GST_PTR_FORMAT, caps);
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);
gst_pad_set_caps (dec->srcpad, caps);
gst_caps_unref (caps);
dec->caps_width = width;
dec->caps_height = height;
dec->caps_framerate_numerator = dec->framerate_numerator;
dec->caps_framerate_denominator = dec->framerate_denominator;
}
static GstFlowReturn
gst_jpeg_dec_chain (GstPad * pad, GstBuffer * buf)
{
GstFlowReturn ret = GST_FLOW_OK;
GstJpegDec *dec;
GstBuffer *outbuf = NULL;
#ifndef GST_DISABLE_GST_DEBUG
guchar *data;
#endif
guchar *outdata;
guchar *base[3], *last[3];
gint img_len;
guint outsize;
gint width, height;
gint r_h, r_v;
guint code, hdr_ok;
GstClockTime timestamp, duration;
dec = GST_JPEG_DEC (GST_PAD_PARENT (pad));
timestamp = GST_BUFFER_TIMESTAMP (buf);
duration = GST_BUFFER_DURATION (buf);
if (GST_CLOCK_TIME_IS_VALID (timestamp))
dec->next_ts = timestamp;
if (GST_BUFFER_IS_DISCONT (buf)) {
GST_DEBUG_OBJECT (dec, "buffer has DISCONT flag set");
dec->discont = TRUE;
if (!dec->packetized && gst_adapter_available (dec->adapter)) {
GST_WARNING_OBJECT (dec, "DISCONT buffer in non-packetized mode, bad");
gst_adapter_clear (dec->adapter);
}
}
gst_adapter_push (dec->adapter, buf);
buf = NULL;
/* If we are non-packetized and know the total incoming size in bytes,
* just wait until we have enough before doing any processing. */
if (!dec->packetized && (dec->segment.format == GST_FORMAT_BYTES) &&
(dec->segment.stop != -1) &&
(gst_adapter_available (dec->adapter) < dec->segment.stop)) {
/* We assume that non-packetized input in bytes is *one* single jpeg image */
GST_DEBUG ("Non-packetized mode. Got %d bytes, need %" G_GINT64_FORMAT,
gst_adapter_available (dec->adapter), dec->segment.stop);
goto need_more_data;
}
again:
if (!gst_jpeg_dec_ensure_header (dec))
goto need_more_data;
/* If we know that each input buffer contains data
* for a whole jpeg image (e.g. MJPEG streams), just
* do some sanity checking instead of parsing all of
* the jpeg data */
if (dec->packetized) {
img_len = gst_adapter_available (dec->adapter);
} else {
/* Parse jpeg image to handle jpeg input that
* is not aligned to buffer boundaries */
img_len = gst_jpeg_dec_parse_image_data (dec);
if (img_len == 0) {
goto need_more_data;
} else if (img_len < 0) {
gst_adapter_flush (dec->adapter, -img_len);
goto again;
}
}
dec->rem_img_len = img_len;
GST_LOG_OBJECT (dec, "image size = %u", img_len);
/* QoS: if we're too late anyway, skip decoding */
if (dec->packetized && !gst_jpeg_dec_do_qos (dec, timestamp))
goto skip_decoding;
#ifndef GST_DISABLE_GST_DEBUG
data = (guint8 *) gst_adapter_peek (dec->adapter, 4);
GST_LOG_OBJECT (dec, "reading header %02x %02x %02x %02x", data[0], data[1],
data[2], data[3]);
#endif
gst_jpeg_dec_fill_input_buffer (&dec->cinfo);
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 */
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);
}
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);
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 > 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;
}
width = dec->cinfo.output_width;
height = dec->cinfo.output_height;
if (G_UNLIKELY (width < MIN_WIDTH || width > MAX_WIDTH ||
height < MIN_HEIGHT || height > MAX_HEIGHT))
goto wrong_size;
gst_jpeg_dec_negotiate (dec, width, height, dec->cinfo.jpeg_color_space);
ret = gst_pad_alloc_buffer_and_set_caps (dec->srcpad, GST_BUFFER_OFFSET_NONE,
dec->outsize, GST_PAD_CAPS (dec->srcpad), &outbuf);
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto alloc_failed;
outdata = GST_BUFFER_DATA (outbuf);
outsize = GST_BUFFER_SIZE (outbuf);
GST_LOG_OBJECT (dec, "width %d, height %d, buffer size %d, required size %d",
width, height, outsize, dec->outsize);
GST_BUFFER_TIMESTAMP (outbuf) = dec->next_ts;
if (dec->packetized && GST_CLOCK_TIME_IS_VALID (dec->next_ts)) {
if (GST_CLOCK_TIME_IS_VALID (duration)) {
/* use duration from incoming buffer for outgoing buffer */
dec->next_ts += duration;
} else if (dec->framerate_numerator != 0) {
duration = gst_util_uint64_scale (GST_SECOND,
dec->framerate_denominator, dec->framerate_numerator);
dec->next_ts += duration;
} else {
duration = GST_CLOCK_TIME_NONE;
dec->next_ts = GST_CLOCK_TIME_NONE;
}
} else {
duration = GST_CLOCK_TIME_NONE;
dec->next_ts = GST_CLOCK_TIME_NONE;
}
GST_BUFFER_DURATION (outbuf) = duration;
if (dec->cinfo.jpeg_color_space == JCS_RGB) {
base[0] = outdata + dec->offset[0];
base[1] = outdata + dec->offset[1];
base[2] = outdata + dec->offset[2];
gst_jpeg_dec_decode_rgb (dec, base, width, height, dec->inc, dec->stride);
} else if (dec->cinfo.jpeg_color_space == JCS_GRAYSCALE) {
base[0] = outdata + dec->offset[0];
gst_jpeg_dec_decode_grayscale (dec, base, width, height, dec->inc,
dec->stride);
} else {
/* mind the swap, jpeglib outputs blue chroma first
* ensonic: I see no swap?
*/
base[0] = outdata + I420_Y_OFFSET (width, height);
base[1] = outdata + I420_U_OFFSET (width, height);
base[2] = outdata + I420_V_OFFSET (width, height);
/* make sure we don't make jpeglib write beyond our buffer,
* which might happen if (height % (r_v*DCTSIZE)) != 0 */
last[0] = base[0] + (I420_Y_ROWSTRIDE (width) * (height - 1));
last[1] =
base[1] + (I420_U_ROWSTRIDE (width) * ((GST_ROUND_UP_2 (height) / 2) -
1));
last[2] =
base[2] + (I420_V_ROWSTRIDE (width) * ((GST_ROUND_UP_2 (height) / 2) -
1));
GST_LOG_OBJECT (dec, "decompressing (reqired 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, base, last, width, height, r_v, r_h,
dec->cinfo.num_components);
} else {
ret = gst_jpeg_dec_decode_direct (dec, base, last, width, height);
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto decode_direct_failed;
}
}
GST_LOG_OBJECT (dec, "decompressing finished");
jpeg_finish_decompress (&dec->cinfo);
/* Clipping */
if (dec->segment.format == GST_FORMAT_TIME) {
gint64 start, stop, clip_start, clip_stop;
GST_LOG_OBJECT (dec, "Attempting clipping");
start = GST_BUFFER_TIMESTAMP (outbuf);
if (GST_BUFFER_DURATION (outbuf) == GST_CLOCK_TIME_NONE)
stop = start;
else
stop = start + GST_BUFFER_DURATION (outbuf);
if (gst_segment_clip (&dec->segment, GST_FORMAT_TIME,
start, stop, &clip_start, &clip_stop)) {
GST_LOG_OBJECT (dec, "Clipping start to %" GST_TIME_FORMAT,
GST_TIME_ARGS (clip_start));
GST_BUFFER_TIMESTAMP (outbuf) = clip_start;
if (GST_BUFFER_DURATION (outbuf) != GST_CLOCK_TIME_NONE) {
GST_LOG_OBJECT (dec, "Clipping duration to %" GST_TIME_FORMAT,
GST_TIME_ARGS (clip_stop - clip_start));
GST_BUFFER_DURATION (outbuf) = clip_stop - clip_start;
}
} else
goto drop_buffer;
}
/* reset error count on successful decode */
dec->error_count = 0;
++dec->good_count;
GST_LOG_OBJECT (dec, "pushing buffer (ts=%" GST_TIME_FORMAT ", dur=%"
GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)));
ret = gst_pad_push (dec->srcpad, outbuf);
skip_decoding:
done:
gst_adapter_flush (dec->adapter, dec->rem_img_len);
exit:
if (G_UNLIKELY (ret == GST_FLOW_ERROR)) {
jpeg_abort_decompress (&dec->cinfo);
ret = gst_jpeg_dec_post_error_or_warning (dec);
}
return ret;
/* special cases */
need_more_data:
{
GST_LOG_OBJECT (dec, "we need more data");
if (outbuf) {
gst_buffer_unref (outbuf);
outbuf = NULL;
}
ret = GST_FLOW_OK;
goto exit;
}
/* ERRORS */
wrong_size:
{
gst_jpeg_dec_set_error (dec, GST_FUNCTION, __LINE__,
"Picture is too small or too big (%ux%u)", width, height);
ret = GST_FLOW_ERROR;
goto done;
}
decode_error:
{
gchar err_msg[JMSG_LENGTH_MAX];
dec->jerr.pub.format_message ((j_common_ptr) (&dec->cinfo), err_msg);
gst_jpeg_dec_set_error (dec, GST_FUNCTION, __LINE__,
"Decode error #%u: %s", code, err_msg);
if (outbuf) {
gst_buffer_unref (outbuf);
outbuf = NULL;
}
ret = GST_FLOW_ERROR;
goto done;
}
decode_direct_failed:
{
/* already posted an error message */
jpeg_abort_decompress (&dec->cinfo);
gst_buffer_replace (&outbuf, NULL);
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_UNEXPECTED && ret != GST_FLOW_WRONG_STATE &&
ret != GST_FLOW_NOT_LINKED) {
gst_jpeg_dec_set_error (dec, GST_FUNCTION, __LINE__,
"Buffer allocation failed, reason: %s", reason);
}
goto exit;
}
drop_buffer:
{
GST_WARNING_OBJECT (dec, "Outgoing buffer is outside configured segment");
gst_buffer_unref (outbuf);
ret = GST_FLOW_OK;
goto exit;
}
components_not_supported:
{
gst_jpeg_dec_set_error (dec, GST_FUNCTION, __LINE__,
"more components than supported: %d > 3", dec->cinfo.num_components);
ret = GST_FLOW_ERROR;
goto done;
}
unsupported_colorspace:
{
gst_jpeg_dec_set_error (dec, GST_FUNCTION, __LINE__,
"Picture has unknown or unsupported colourspace");
ret = GST_FLOW_ERROR;
goto done;
}
invalid_yuvrgbgrayscale:
{
gst_jpeg_dec_set_error (dec, GST_FUNCTION, __LINE__,
"Picture is corrupt or unhandled YUV/RGB/grayscale layout");
ret = GST_FLOW_ERROR;
goto done;
}
}
static gboolean
gst_jpeg_dec_src_event (GstPad * pad, GstEvent * event)
{
GstJpegDec *dec;
gboolean res;
dec = GST_JPEG_DEC (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_QOS:{
GstClockTimeDiff diff;
GstClockTime timestamp;
gdouble proportion;
gst_event_parse_qos (event, &proportion, &diff, &timestamp);
gst_jpeg_dec_update_qos (dec, proportion, diff, timestamp);
break;
}
default:
break;
}
res = gst_pad_push_event (dec->sinkpad, event);
gst_object_unref (dec);
return res;
}
static gboolean
gst_jpeg_dec_sink_event (GstPad * pad, GstEvent * event)
{
gboolean ret = TRUE;
GstJpegDec *dec = GST_JPEG_DEC (GST_OBJECT_PARENT (pad));
GST_DEBUG_OBJECT (dec, "event : %s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
GST_DEBUG_OBJECT (dec, "Aborting decompress");
jpeg_abort_decompress (&dec->cinfo);
gst_segment_init (&dec->segment, GST_FORMAT_UNDEFINED);
gst_adapter_clear (dec->adapter);
g_free (dec->cur_buf);
dec->cur_buf = NULL;
dec->parse_offset = 0;
dec->parse_entropy_len = 0;
dec->parse_resync = FALSE;
gst_jpeg_dec_reset_qos (dec);
break;
case GST_EVENT_NEWSEGMENT:{
gboolean update;
gdouble rate, applied_rate;
GstFormat format;
gint64 start, stop, position;
gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
&format, &start, &stop, &position);
GST_DEBUG_OBJECT (dec, "Got NEWSEGMENT [%" GST_TIME_FORMAT
" - %" GST_TIME_FORMAT " / %" GST_TIME_FORMAT "]",
GST_TIME_ARGS (start), GST_TIME_ARGS (stop),
GST_TIME_ARGS (position));
gst_segment_set_newsegment_full (&dec->segment, update, rate,
applied_rate, format, start, stop, position);
break;
}
default:
break;
}
ret = gst_pad_push_event (dec->srcpad, event);
return ret;
}
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;
case PROP_MAX_ERRORS:
g_atomic_int_set (&dec->max_errors, g_value_get_int (value));
break;
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;
case PROP_MAX_ERRORS:
g_value_set_int (value, g_atomic_int_get (&dec->max_errors));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_jpeg_dec_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstJpegDec *dec;
dec = GST_JPEG_DEC (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
dec->error_count = 0;
dec->good_count = 0;
dec->framerate_numerator = 0;
dec->framerate_denominator = 1;
dec->caps_framerate_numerator = dec->caps_framerate_denominator = 0;
dec->caps_width = -1;
dec->caps_height = -1;
dec->clrspc = -1;
dec->packetized = FALSE;
dec->next_ts = 0;
dec->discont = TRUE;
dec->parse_offset = 0;
dec->parse_entropy_len = 0;
dec->parse_resync = FALSE;
dec->cur_buf = NULL;
gst_segment_init (&dec->segment, GST_FORMAT_UNDEFINED);
gst_jpeg_dec_reset_qos (dec);
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret != GST_STATE_CHANGE_SUCCESS)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_adapter_clear (dec->adapter);
g_free (dec->cur_buf);
dec->cur_buf = NULL;
gst_jpeg_dec_free_buffers (dec);
break;
default:
break;
}
return ret;
}
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