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jpeg: Port jpegdec/jpegenc to base video classes

Browse source 
Conflicts:

	ext/jpeg/gstjpegdec.c
	ext/jpeg/gstjpegdec.h
	ext/jpeg/gstjpegenc.c
	ext/jpeg/gstjpegenc.h

Reverted to 0.10 versions for now, next port again.
This commit is contained in:
Edward Hervey 2012-04-06 12:13:24 +02:00 committed by Sebastian Dröge
parent dd75c21670
commit 8e9eb77816
4 changed files with 448 additions and 1050 deletions
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1016
ext/jpeg/gstjpegdec.c
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File diff suppressed because it is too large Load diff

48
ext/jpeg/gstjpegdec.h
View file

@ -1,5 +1,7 @@
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* 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
@ -25,6 +27,7 @@
#include <setjmp.h>
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/video/gstvideodecoder.h>
#include <gst/base/gstadapter.h>
/* this is a hack hack hack to get around jpeglib header bugs... */
@ -64,44 +67,20 @@ struct GstJpegDecSourceMgr {
* doesn't handle the N buffers in, 1 buffer out case,
* but only the 1-in 1-out case */
struct _GstJpegDec {
GstElement element;
/* pads */
GstPad *sinkpad;
GstPad *srcpad;
GstAdapter *adapter;
GstVideoDecoder decoder;
guint8 *cur_buf;
/* TRUE if each input buffer contains a whole jpeg image */
gboolean packetized;
/* negotiated state */
GstVideoCodecState *input_state;
GstVideoCodecFrame *current_frame;
/* the (expected) timestamp of the next frame */
guint64 next_ts;
GstSegment segment;
/* TRUE if the next output buffer should have the DISCONT flag set */
gboolean discont;
/* QoS stuff *//* with LOCK */
gdouble proportion;
GstClockTime earliest_time;
GstClockTime qos_duration;
/* input state */
gint in_fps_n;
gint in_fps_d;
/* negotiated output state */
GstBufferPool *pool;
GstVideoInfo info;
GstClockTime duration;
gint clrspc;
gint offset[3];
gint stride;
gint inc;
/* parse state */
gboolean saw_header;
gint parse_offset;
gint parse_entropy_len;
gint parse_resync;
@ -118,9 +97,6 @@ struct _GstJpegDec {
/* number of errors since start or last successfully decoded image */
guint error_count;
/* number of successfully decoded images since start */
guint good_count;
struct jpeg_decompress_struct cinfo;
struct GstJpegDecErrorMgr jerr;
struct GstJpegDecSourceMgr jsrc;
@ -133,7 +109,7 @@ struct _GstJpegDec {
};
struct _GstJpegDecClass {
GstElementClass parent_class;
GstVideoDecoderClass decoder_class;
};
GType gst_jpeg_dec_get_type(void);

395
ext/jpeg/gstjpegenc.c
View file

@ -1,5 +1,7 @@
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* 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
@ -38,6 +40,7 @@
#include "gstjpegenc.h"
#include "gstjpeg.h"
#include <gst/video/video.h>
#include <gst/video/gstvideometa.h>
/* experimental */
/* setting smoothig seems to have no effect in libjepeg
@ -69,24 +72,25 @@ enum
static void gst_jpegenc_reset (GstJpegEnc * enc);
static void gst_jpegenc_finalize (GObject * object);
static GstFlowReturn gst_jpegenc_chain (GstPad * pad, GstObject * parent,
GstBuffer * buf);
static gboolean gst_jpegenc_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static GstCaps *gst_jpegenc_getcaps (GstPad * pad, GstCaps * filter);
static gboolean gst_jpegenc_sink_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static void gst_jpegenc_resync (GstJpegEnc * jpegenc);
static void gst_jpegenc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_jpegenc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_jpegenc_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_jpegenc_start (GstVideoEncoder * benc);
static gboolean gst_jpegenc_stop (GstVideoEncoder * benc);
static gboolean gst_jpegenc_set_format (GstVideoEncoder * encoder,
GstVideoCodecState * state);
static GstFlowReturn gst_jpegenc_handle_frame (GstVideoEncoder * encoder,
GstVideoCodecFrame * frame);
static gboolean gst_jpegenc_propose_allocation (GstVideoEncoder * encoder,
GstQuery * query);
/* static guint gst_jpegenc_signals[LAST_SIGNAL] = { 0 }; */
#define gst_jpegenc_parent_class parent_class
G_DEFINE_TYPE (GstJpegEnc, gst_jpegenc, GST_TYPE_ELEMENT);
G_DEFINE_TYPE (GstJpegEnc, gst_jpegenc, GST_TYPE_VIDEO_ENCODER);
/* *INDENT-OFF* */
static GstStaticPadTemplate gst_jpegenc_sink_pad_template =
@ -108,15 +112,18 @@ GST_STATIC_PAD_TEMPLATE ("src",
"height = (int) [ 16, 65535 ], " "framerate = (fraction) [ 0/1, MAX ]")
);
static void
gst_jpegenc_class_init (GstJpegEncClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstElementClass *element_class;
GstVideoEncoderClass *venc_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
element_class = (GstElementClass *) klass;
venc_class = (GstVideoEncoderClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = gst_jpegenc_finalize;
gobject_class->set_property = gst_jpegenc_set_property;
@ -141,20 +148,30 @@ gst_jpegenc_class_init (GstJpegEncClass * klass)
JPEG_DEFAULT_IDCT_METHOD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstelement_class->change_state = gst_jpegenc_change_state;
gst_element_class_add_pad_template (gstelement_class,
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_jpegenc_sink_pad_template));
gst_element_class_add_pad_template (gstelement_class,
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_jpegenc_src_pad_template));
gst_element_class_set_static_metadata (gstelement_class, "JPEG image encoder",
gst_element_class_set_details_simple (element_class, "JPEG image encoder",
"Codec/Encoder/Image",
"Encode images in JPEG format", "Wim Taymans <wim.taymans@tvd.be>");
venc_class->start = gst_jpegenc_start;
venc_class->stop = gst_jpegenc_stop;
venc_class->set_format = gst_jpegenc_set_format;
venc_class->handle_frame = gst_jpegenc_handle_frame;
venc_class->propose_allocation = gst_jpegenc_propose_allocation;
GST_DEBUG_CATEGORY_INIT (jpegenc_debug, "jpegenc", 0,
"JPEG encoding element");
}
static void
gst_jpegenc_init_destination (j_compress_ptr cinfo)
{
GST_DEBUG ("gst_jpegenc_chain: init_destination");
}
static void
ensure_memory (GstJpegEnc * jpegenc)
{
@ -193,12 +210,6 @@ ensure_memory (GstJpegEnc * jpegenc)
jpegenc->jdest.free_in_buffer = new_size - old_size;
}
static void
gst_jpegenc_init_destination (j_compress_ptr cinfo)
{
GST_DEBUG ("gst_jpegenc_chain: init_destination");
}
static boolean
gst_jpegenc_flush_destination (j_compress_ptr cinfo)
{
@ -224,30 +235,17 @@ gst_jpegenc_term_destination (j_compress_ptr cinfo)
jpegenc->output_map.size - jpegenc->jdest.free_in_buffer);
jpegenc->output_map.data = NULL;
jpegenc->output_map.size = 0;
gst_video_frame_unmap (&jpegenc->current_vframe);
gst_video_encoder_finish_frame (GST_VIDEO_ENCODER (jpegenc),
jpegenc->current_frame);
jpegenc->current_frame = NULL;
}
static void
gst_jpegenc_init (GstJpegEnc * jpegenc)
{
/* create the sink and src pads */
jpegenc->sinkpad =
gst_pad_new_from_static_template (&gst_jpegenc_sink_pad_template, "sink");
gst_pad_set_chain_function (jpegenc->sinkpad,
GST_DEBUG_FUNCPTR (gst_jpegenc_chain));
gst_pad_set_query_function (jpegenc->sinkpad,
GST_DEBUG_FUNCPTR (gst_jpegenc_sink_query));
gst_pad_set_event_function (jpegenc->sinkpad,
GST_DEBUG_FUNCPTR (gst_jpegenc_sink_event));
gst_element_add_pad (GST_ELEMENT (jpegenc), jpegenc->sinkpad);
jpegenc->srcpad =
gst_pad_new_from_static_template (&gst_jpegenc_src_pad_template, "src");
gst_pad_use_fixed_caps (jpegenc->srcpad);
gst_element_add_pad (GST_ELEMENT (jpegenc), jpegenc->srcpad);
/* reset the initial video state */
gst_video_info_init (&jpegenc->info);
/* setup jpeglib */
memset (&jpegenc->cinfo, 0, sizeof (jpegenc->cinfo));
memset (&jpegenc->jerr, 0, sizeof (jpegenc->jerr));
@ -285,8 +283,6 @@ gst_jpegenc_reset (GstJpegEnc * enc)
enc->row[i][j] = NULL;
}
}
gst_video_info_init (&enc->info);
}
static void
@ -296,220 +292,92 @@ gst_jpegenc_finalize (GObject * object)
jpeg_destroy_compress (&filter->cinfo);
if (filter->input_state)
gst_video_codec_state_unref (filter->input_state);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstCaps *
gst_jpegenc_getcaps (GstPad * pad, GstCaps * filter)
{
GstJpegEnc *jpegenc = GST_JPEGENC (gst_pad_get_parent (pad));
GstCaps *caps, *othercaps;
GstCaps *otherfilter;
GstCaps *templ;
gint i, j;
GstStructure *structure = NULL;
/* we want to proxy properties like width, height and framerate from the
other end of the element */
if (filter) {
otherfilter = gst_caps_new_empty ();
for (i = 0; i < gst_caps_get_size (filter); i++) {
GstStructure *s = gst_structure_copy (gst_caps_get_structure (filter, i));
gst_structure_set_name (s, "image/jpeg");
gst_caps_append_structure (otherfilter, s);
}
} else {
otherfilter = NULL;
}
othercaps = gst_pad_peer_query_caps (jpegenc->srcpad, otherfilter);
if (otherfilter)
gst_caps_unref (otherfilter);
templ = gst_pad_get_pad_template_caps (pad);
if (othercaps == NULL ||
gst_caps_is_empty (othercaps) || gst_caps_is_any (othercaps)) {
caps = templ;
goto done;
}
caps = gst_caps_new_empty ();
for (i = 0; i < gst_caps_get_size (templ); i++) {
/* pick fields from peer caps */
for (j = 0; j < gst_caps_get_size (othercaps); j++) {
GstStructure *s = gst_caps_get_structure (othercaps, j);
const GValue *val;
structure = gst_structure_copy (gst_caps_get_structure (templ, i));
if ((val = gst_structure_get_value (s, "width")))
gst_structure_set_value (structure, "width", val);
if ((val = gst_structure_get_value (s, "height")))
gst_structure_set_value (structure, "height", val);
if ((val = gst_structure_get_value (s, "framerate")))
gst_structure_set_value (structure, "framerate", val);
caps = gst_caps_merge_structure (caps, structure);
}
}
gst_caps_unref (templ);
done:
gst_caps_replace (&othercaps, NULL);
gst_object_unref (jpegenc);
return caps;
}
static gboolean
gst_jpegenc_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
gst_jpegenc_set_format (GstVideoEncoder * encoder, GstVideoCodecState * state)
{
gboolean res;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
{
GstCaps *filter, *caps;
gst_query_parse_caps (query, &filter);
caps = gst_jpegenc_getcaps (pad, filter);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
res = TRUE;
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
}
static gboolean
gst_jpegenc_setcaps (GstJpegEnc * enc, GstCaps * caps)
{
GstVideoInfo info;
GstJpegEnc *enc = GST_JPEGENC (encoder);
gint i;
GstCaps *othercaps;
gboolean ret;
const GstVideoFormatInfo *vinfo;
GstVideoInfo *info = &state->info;
GstVideoCodecState *output;
/* get info from caps */
if (!gst_video_info_from_caps (&info, caps))
goto refuse_caps;
/* store input description */
enc->info = info;
vinfo = info.finfo;
if (enc->input_state)
gst_video_codec_state_unref (enc->input_state);
enc->input_state = gst_video_codec_state_ref (state);
/* prepare a cached image description */
enc->channels = 3 + (GST_VIDEO_FORMAT_INFO_HAS_ALPHA (vinfo) ? 1 : 0);
enc->channels = GST_VIDEO_INFO_N_COMPONENTS (info);
/* ... but any alpha is disregarded in encoding */
if (GST_VIDEO_FORMAT_INFO_IS_GRAY (vinfo))
if (GST_VIDEO_INFO_IS_GRAY (info))
enc->channels = 1;
else
enc->channels = 3;
enc->h_max_samp = 0;
enc->v_max_samp = 0;
for (i = 0; i < enc->channels; ++i) {
enc->cwidth[i] = GST_VIDEO_INFO_COMP_WIDTH (&info, i);
enc->cheight[i] = GST_VIDEO_INFO_COMP_HEIGHT (&info, i);
enc->inc[i] = GST_VIDEO_INFO_COMP_PSTRIDE (&info, i);
enc->h_samp[i] = GST_ROUND_UP_4 (info.width) / enc->cwidth[i];
enc->cwidth[i] = GST_VIDEO_INFO_COMP_WIDTH (info, i);
enc->cheight[i] = GST_VIDEO_INFO_COMP_HEIGHT (info, i);
enc->inc[i] = GST_VIDEO_INFO_COMP_PSTRIDE (info, i);
enc->h_samp[i] =
GST_ROUND_UP_4 (GST_VIDEO_INFO_WIDTH (info)) / enc->cwidth[i];
enc->h_max_samp = MAX (enc->h_max_samp, enc->h_samp[i]);
enc->v_samp[i] = GST_ROUND_UP_4 (info.height) / enc->cheight[i];
enc->v_samp[i] =
GST_ROUND_UP_4 (GST_VIDEO_INFO_HEIGHT (info)) / enc->cheight[i];
enc->v_max_samp = MAX (enc->v_max_samp, enc->v_samp[i]);
}
/* samp should only be 1, 2 or 4 */
g_assert (enc->h_max_samp <= 4);
g_assert (enc->v_max_samp <= 4);
/* now invert */
/* maximum is invariant, as one of the components should have samp 1 */
for (i = 0; i < enc->channels; ++i) {
GST_DEBUG ("%d %d", enc->h_samp[i], enc->h_max_samp);
enc->h_samp[i] = enc->h_max_samp / enc->h_samp[i];
enc->v_samp[i] = enc->v_max_samp / enc->v_samp[i];
}
enc->planar = (enc->inc[0] == 1 && enc->inc[1] == 1 && enc->inc[2] == 1);
othercaps = gst_caps_copy (gst_pad_get_pad_template_caps (enc->srcpad));
gst_caps_set_simple (othercaps,
"width", G_TYPE_INT, info.width, "height", G_TYPE_INT, info.height, NULL);
if (info.fps_d > 0)
gst_caps_set_simple (othercaps,
"framerate", GST_TYPE_FRACTION, info.fps_n, info.fps_d, NULL);
if (info.par_d > 0)
gst_caps_set_simple (othercaps,
"pixel-aspect-ratio", GST_TYPE_FRACTION, info.par_n, info.par_d, NULL);
output =
gst_video_encoder_set_output_state (encoder,
gst_caps_new_empty_simple ("image/jpeg"), state);
gst_video_codec_state_unref (output);
ret = gst_pad_set_caps (enc->srcpad, othercaps);
gst_caps_unref (othercaps);
gst_jpegenc_resync (enc);
if (ret)
gst_jpegenc_resync (enc);
return ret;
/* ERRORS */
refuse_caps:
{
GST_WARNING_OBJECT (enc, "refused caps %" GST_PTR_FORMAT, caps);
return FALSE;
}
}
static gboolean
gst_jpegenc_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
gboolean res;
GstJpegEnc *enc = GST_JPEGENC (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
res = gst_jpegenc_setcaps (enc, caps);
gst_event_unref (event);
break;
}
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
return res;
return TRUE;
}
static void
gst_jpegenc_resync (GstJpegEnc * jpegenc)
{
GstVideoInfo *info;
gint width, height;
gint i, j;
const GstVideoFormatInfo *finfo;
GST_DEBUG_OBJECT (jpegenc, "resync");
finfo = jpegenc->info.finfo;
if (!jpegenc->input_state)
return;
jpegenc->cinfo.image_width = width = GST_VIDEO_INFO_WIDTH (&jpegenc->info);
jpegenc->cinfo.image_height = height = GST_VIDEO_INFO_HEIGHT (&jpegenc->info);
info = &jpegenc->input_state->info;
jpegenc->cinfo.image_width = width = GST_VIDEO_INFO_WIDTH (info);
jpegenc->cinfo.image_height = height = GST_VIDEO_INFO_HEIGHT (info);
jpegenc->cinfo.input_components = jpegenc->channels;
GST_DEBUG_OBJECT (jpegenc, "width %d, height %d", width, height);
GST_DEBUG_OBJECT (jpegenc, "format %d",
GST_VIDEO_INFO_FORMAT (&jpegenc->info));
GST_DEBUG_OBJECT (jpegenc, "format %d", GST_VIDEO_INFO_FORMAT (info));
if (GST_VIDEO_FORMAT_INFO_IS_RGB (finfo)) {
if (GST_VIDEO_INFO_IS_RGB (info)) {
GST_DEBUG_OBJECT (jpegenc, "RGB");
jpegenc->cinfo.in_color_space = JCS_RGB;
} else if (GST_VIDEO_FORMAT_INFO_IS_GRAY (finfo)) {
} else if (GST_VIDEO_INFO_IS_GRAY (info)) {
GST_DEBUG_OBJECT (jpegenc, "gray");
jpegenc->cinfo.in_color_space = JCS_GRAYSCALE;
} else {
@ -518,7 +386,7 @@ gst_jpegenc_resync (GstJpegEnc * jpegenc)
}
/* input buffer size as max output */
jpegenc->bufsize = GST_VIDEO_INFO_SIZE (&jpegenc->info);
jpegenc->bufsize = GST_VIDEO_INFO_SIZE (info);
jpeg_set_defaults (&jpegenc->cinfo);
jpegenc->cinfo.raw_data_in = TRUE;
/* duh, libjpeg maps RGB to YUV ... and don't expect some conversion */
@ -554,36 +422,33 @@ gst_jpegenc_resync (GstJpegEnc * jpegenc)
}
static GstFlowReturn
gst_jpegenc_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
gst_jpegenc_handle_frame (GstVideoEncoder * encoder, GstVideoCodecFrame * frame)
{
GstFlowReturn ret;
GstJpegEnc *jpegenc;
guint height;
guchar *base[3], *end[3];
guint stride[3];
gint i, j, k;
GstBuffer *outbuf;
GstVideoFrame frame;
static GstAllocationParams params = { 0, 0, 0, 3, };
jpegenc = GST_JPEGENC (parent);
jpegenc = GST_JPEGENC (encoder);
if (G_UNLIKELY (GST_VIDEO_INFO_FORMAT (&jpegenc->info) ==
GST_VIDEO_FORMAT_UNKNOWN))
goto not_negotiated;
GST_LOG_OBJECT (jpegenc, "got new frame");
if (!gst_video_frame_map (&frame, &jpegenc->info, buf, GST_MAP_READ))
if (!gst_video_frame_map (&jpegenc->current_vframe,
&jpegenc->input_state->info, frame->input_buffer, GST_MAP_READ))
goto invalid_frame;
height = GST_VIDEO_FRAME_HEIGHT (&frame);
jpegenc->current_frame = frame;
GST_LOG_OBJECT (jpegenc, "got buffer of %" G_GSIZE_FORMAT " bytes",
gst_buffer_get_size (buf));
height = GST_VIDEO_INFO_HEIGHT (&jpegenc->input_state->info);
for (i = 0; i < jpegenc->channels; i++) {
base[i] = GST_VIDEO_FRAME_COMP_DATA (&frame, i);
stride[i] = GST_VIDEO_FRAME_COMP_STRIDE (&frame, i);
end[i] = base[i] + GST_VIDEO_FRAME_COMP_HEIGHT (&frame, i) * stride[i];
base[i] = GST_VIDEO_FRAME_COMP_DATA (&jpegenc->current_vframe, i);
stride[i] = GST_VIDEO_FRAME_COMP_STRIDE (&jpegenc->current_vframe, i);
end[i] =
base[i] + GST_VIDEO_FRAME_COMP_HEIGHT (&jpegenc->current_vframe,
i) * stride[i];
}
jpegenc->output_mem = gst_allocator_alloc (NULL, jpegenc->bufsize, &params);
@ -643,33 +508,25 @@ gst_jpegenc_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
jpeg_finish_compress (&jpegenc->cinfo);
GST_LOG_OBJECT (jpegenc, "compressing done");
outbuf = gst_buffer_new ();
gst_buffer_copy_into (outbuf, buf, GST_BUFFER_COPY_METADATA, 0, -1);
gst_buffer_append_memory (outbuf, jpegenc->output_mem);
jpegenc->output_mem = NULL;
return GST_FLOW_OK;
ret = gst_pad_push (jpegenc->srcpad, outbuf);
gst_video_frame_unmap (&frame);
gst_buffer_unref (buf);
return ret;
/* ERRORS */
not_negotiated:
{
GST_WARNING_OBJECT (jpegenc, "no input format set (no caps on buffer)");
gst_buffer_unref (buf);
return GST_FLOW_NOT_NEGOTIATED;
}
invalid_frame:
{
GST_WARNING_OBJECT (jpegenc, "invalid frame received");
gst_buffer_unref (buf);
gst_video_encoder_finish_frame (encoder, frame);
return GST_FLOW_OK;
}
}
static gboolean
gst_jpegenc_propose_allocation (GstVideoEncoder * encoder, GstQuery * query)
{
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE);
return GST_VIDEO_ENCODER_CLASS (parent_class)->propose_allocation (encoder,
query);
}
static void
gst_jpegenc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
@ -726,34 +583,24 @@ gst_jpegenc_get_property (GObject * object, guint prop_id, GValue * value,
GST_OBJECT_UNLOCK (jpegenc);
}
static GstStateChangeReturn
gst_jpegenc_change_state (GstElement * element, GstStateChange transition)
static gboolean
gst_jpegenc_start (GstVideoEncoder * benc)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstJpegEnc *filter = GST_JPEGENC (element);
GstJpegEnc *enc = (GstJpegEnc *) benc;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
GST_DEBUG_OBJECT (element, "setting line buffers");
filter->line[0] = NULL;
filter->line[1] = NULL;
filter->line[2] = NULL;
break;
default:
break;
}
enc->line[0] = NULL;
enc->line[1] = NULL;
enc->line[2] = NULL;
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_jpegenc_reset (filter);
break;
default:
break;
}
return ret;
return TRUE;
}
static gboolean
gst_jpegenc_stop (GstVideoEncoder * benc)
{
GstJpegEnc *enc = (GstJpegEnc *) benc;
gst_jpegenc_reset (enc);
return TRUE;
}

39
ext/jpeg/gstjpegenc.h
View file

@ -1,5 +1,7 @@
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* 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
@ -24,6 +26,7 @@
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/video/gstvideoencoder.h>
/* this is a hack hack hack to get around jpeglib header bugs... */
#ifdef HAVE_STDLIB_H
# undef HAVE_STDLIB_H
@ -46,23 +49,24 @@ G_BEGIN_DECLS
typedef struct _GstJpegEnc GstJpegEnc;
typedef struct _GstJpegEncClass GstJpegEncClass;
#define GST_JPEG_ENC_MAX_COMPONENT 4
struct _GstJpegEnc
{
GstElement element;
GstVideoEncoder encoder;
/* pads */
GstPad *sinkpad, *srcpad;
GstVideoCodecState *input_state;
GstVideoCodecFrame *current_frame;
/* stream/image properties */
GstVideoInfo info;
gint channels;
guint channels;
/* standard video_format indexed */
gint inc[GST_VIDEO_MAX_COMPONENTS];
gint cwidth[GST_VIDEO_MAX_COMPONENTS];
gint cheight[GST_VIDEO_MAX_COMPONENTS];
gint h_samp[GST_VIDEO_MAX_COMPONENTS];
gint v_samp[GST_VIDEO_MAX_COMPONENTS];
gint stride[GST_JPEG_ENC_MAX_COMPONENT];
gint offset[GST_JPEG_ENC_MAX_COMPONENT];
gint inc[GST_JPEG_ENC_MAX_COMPONENT];
gint cwidth[GST_JPEG_ENC_MAX_COMPONENT];
gint cheight[GST_JPEG_ENC_MAX_COMPONENT];
gint h_samp[GST_JPEG_ENC_MAX_COMPONENT];
gint v_samp[GST_JPEG_ENC_MAX_COMPONENT];
gint h_max_samp;
gint v_max_samp;
gboolean planar;
@ -82,16 +86,15 @@ struct _GstJpegEnc
gint smoothing;
gint idct_method;
/* cached return state for any problems that may occur in callbacks */
GstFlowReturn last_ret;
GstMemory *output_mem;
GstMapInfo output_map;
GstBuffer *output_buffer;
};
struct _GstJpegEncClass
{
GstElementClass parent_class;
GstVideoEncoderClass parent_class;
/* signals */
void (*frame_encoded) (GstElement * element);
};
GType gst_jpegenc_get_type (void);