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gstreamer/gst/nuvdemux/gstnuvdemux.c

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/* GStreamer NUV demuxer
* Copyright (C) <2006> Renato Araujo Oliveira Filho <renato.filho@indt.org.br>
* Rosfran Borges <rosfran.borges@indt.org.br>
*
* 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.
*/
/* Element-Checklist-Version: 5 */
/**
* SECTION:element-nuvdemux
* @see_also: mythtvsrc
*
* Demuxes MythTVs NuppelVideo .nuv file into raw or compressed audio and/or
* video streams.
*
* This element currently only supports pull-based scheduling.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-1.0 filesrc test.nuv ! nuvdemux name=demux demux.audio_00 ! decodebin ! audioconvert ! audioresample ! autoaudiosink demux.video_00 ! queue ! decodebin ! videoconvert ! videoscale ! autovideosink
* ]| Play (parse and decode) an .nuv file and try to output it to
* an automatically detected soundcard and videosink. If the NUV file contains
* compressed audio or video data, this will only work if you have the
* right decoder elements/plugins installed.
* </refsect2>
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/gsterror.h>
#include <gst/gstplugin.h>
#include <string.h>
#include "gst/gst-i18n-plugin.h"
#include "gstnuvdemux.h"
GST_DEBUG_CATEGORY_STATIC (nuvdemux_debug);
#define GST_CAT_DEFAULT nuvdemux_debug
#define GST_FLOW_ERROR_NO_DATA -101
GST_DEBUG_CATEGORY_EXTERN (GST_CAT_EVENT);
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-nuv"));
static GstStaticPadTemplate audio_src_template =
GST_STATIC_PAD_TEMPLATE ("audio_src",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate video_src_template =
GST_STATIC_PAD_TEMPLATE ("video_src",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
/* NUV Demux indexes init/dispose callers */
static void gst_nuv_demux_finalize (GObject * object);
static GstStateChangeReturn gst_nuv_demux_change_state (GstElement * element,
GstStateChange transition);
static void gst_nuv_demux_loop (GstPad * pad);
static GstFlowReturn gst_nuv_demux_chain (GstPad * pad, GstBuffer * buf);
static GstFlowReturn gst_nuv_demux_play (GstPad * pad);
static gboolean gst_nuv_demux_sink_activate_pull (GstPad * sinkpad,
gboolean active);
static gboolean gst_nuv_demux_sink_activate (GstPad * sinkpad);
static GstFlowReturn gst_nuv_demux_read_bytes (GstNuvDemux * nuv, guint64 size,
gboolean move, GstBuffer ** buffer);
static void gst_nuv_demux_reset (GstNuvDemux * nuv);
static gboolean gst_nuv_demux_handle_sink_event (GstPad * sinkpad,
GstEvent * event);
static void gst_nuv_demux_destoy_src_pad (GstNuvDemux * nuv);
static void gst_nuv_demux_send_eos (GstNuvDemux * nuv);
/* GObject methods */
GST_BOILERPLATE (GstNuvDemux, gst_nuv_demux, GstElement, GST_TYPE_ELEMENT);
#if G_BYTE_ORDER == G_BIG_ENDIAN
static inline gdouble
_gdouble_swap_le_be (gdouble * d)
{
union
{
guint64 i;
gdouble d;
} u;
u.d = *d;
u.i = GUINT64_SWAP_LE_BE (u.i);
return u.d;
}
#define READ_DOUBLE_FROM_LE(d) (_gdouble_swap_le_be((gdouble* ) d))
#else /* G_BYTE_ORDER != G_BIG_ENDIAN */
#define READ_DOUBLE_FROM_LE(d) *((gdouble* ) (d))
#endif /* G_BYTE_ORDER != G_BIG_ENDIAN */
static void
gst_nuv_demux_base_init (gpointer klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_static_pad_template (element_class,
&audio_src_template);
gst_element_class_add_static_pad_template (element_class,
&video_src_template);
gst_element_class_add_static_pad_template (element_class, &sink_template);
gst_element_class_set_static_metadata (element_class, "Nuv demuxer",
"Codec/Demuxer",
"Demultiplex a MythTV NuppleVideo .nuv file into audio and video",
"Renato Araujo Oliveira Filho <renato.filho@indt.org.br>,"
"Rosfran Borges <rosfran.borges@indt.org.br>");
}
static void
gst_nuv_demux_class_init (GstNuvDemuxClass * klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->finalize = gst_nuv_demux_finalize;
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_nuv_demux_change_state);
}
static void
gst_nuv_demux_init (GstNuvDemux * nuv, GstNuvDemuxClass * nuv_class)
{
nuv->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
gst_pad_set_activate_function (nuv->sinkpad, gst_nuv_demux_sink_activate);
gst_pad_set_activatepull_function (nuv->sinkpad,
gst_nuv_demux_sink_activate_pull);
gst_pad_set_chain_function (nuv->sinkpad,
GST_DEBUG_FUNCPTR (gst_nuv_demux_chain));
gst_pad_set_event_function (nuv->sinkpad, gst_nuv_demux_handle_sink_event);
gst_element_add_pad (GST_ELEMENT (nuv), nuv->sinkpad);
nuv->adapter = NULL;
nuv->mpeg_buffer = NULL;
nuv->h = NULL;
nuv->eh = NULL;
nuv->fh = NULL;
gst_nuv_demux_reset (nuv);
}
static void
gst_nuv_demux_finalize (GObject * object)
{
GstNuvDemux *nuv = GST_NUV_DEMUX (object);
if (nuv->mpeg_buffer != NULL) {
gst_buffer_unref (nuv->mpeg_buffer);
}
gst_nuv_demux_destoy_src_pad (nuv);
gst_nuv_demux_reset (nuv);
if (nuv->adapter != NULL) {
g_object_unref (nuv->adapter);
nuv->adapter = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/*****************************************************************************
* Utils functions
*****************************************************************************/
static gboolean
gst_nuv_demux_handle_sink_event (GstPad * sinkpad, GstEvent * event)
{
gboolean res = FALSE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:
res = TRUE;
break;
default:
return gst_pad_event_default (sinkpad, event);
break;
}
gst_event_unref (event);
return res;
}
/* HeaderLoad:
*/
static GstFlowReturn
gst_nuv_demux_header_load (GstNuvDemux * nuv, nuv_header ** h_ret)
{
GstBuffer *buffer = NULL;
GstFlowReturn res;
nuv_header *h;
res = gst_nuv_demux_read_bytes (nuv, 72, TRUE, &buffer);
if (res != GST_FLOW_OK)
return res;
h = g_new0 (nuv_header, 1);
memcpy (h->id, buffer->data, 12);
memcpy (h->version, buffer->data + 12, 5);
h->i_width = GST_READ_UINT32_LE (&buffer->data[20]);
h->i_height = GST_READ_UINT32_LE (&buffer->data[24]);
h->i_width_desired = GST_READ_UINT32_LE (&buffer->data[28]);
h->i_height_desired = GST_READ_UINT32_LE (&buffer->data[32]);
h->i_mode = buffer->data[36];
h->d_aspect = READ_DOUBLE_FROM_LE (&buffer->data[40]);
h->d_fps = READ_DOUBLE_FROM_LE (&buffer->data[48]);
h->i_video_blocks = GST_READ_UINT32_LE (&buffer->data[56]);
h->i_audio_blocks = GST_READ_UINT32_LE (&buffer->data[60]);
h->i_text_blocks = GST_READ_UINT32_LE (&buffer->data[64]);
h->i_keyframe_distance = GST_READ_UINT32_LE (&buffer->data[68]);
GST_DEBUG_OBJECT (nuv,
"nuv: h=%s v=%s %dx%d a=%f fps=%f v=%d a=%d t=%d kfd=%d", h->id,
h->version, h->i_width, h->i_height, h->d_aspect, h->d_fps,
h->i_video_blocks, h->i_audio_blocks, h->i_text_blocks,
h->i_keyframe_distance);
*h_ret = h;
gst_buffer_unref (buffer);
return res;
}
static GstFlowReturn
gst_nuv_demux_stream_header_data (GstNuvDemux * nuv)
{
GstFlowReturn res = gst_nuv_demux_header_load (nuv, &nuv->h);
if (res == GST_FLOW_OK)
nuv->state = GST_NUV_DEMUX_EXTRA_DATA;
return res;
}
/*
* Read NUV file tag
*/
static GstFlowReturn
gst_nuv_demux_stream_file_header (GstNuvDemux * nuv)
{
GstFlowReturn res = GST_FLOW_OK;
GstBuffer *file_header = NULL;
res = gst_nuv_demux_read_bytes (nuv, 12, FALSE, &file_header);
if (res != GST_FLOW_OK) {
return res;
} else {
if (strncmp ((gchar *) file_header->data, "MythTVVideo", 11) ||
strncmp ((gchar *) file_header->data, "NuppelVideo", 11)) {
nuv->state = GST_NUV_DEMUX_HEADER_DATA;
} else {
GST_DEBUG_OBJECT (nuv, "error parsing file header");
nuv->state = GST_NUV_DEMUX_INVALID_DATA;
res = GST_FLOW_ERROR;
}
}
if (file_header != NULL) {
gst_buffer_unref (file_header);
}
return res;
}
/* FrameHeaderLoad:
*/
static GstFlowReturn
gst_nuv_demux_frame_header_load (GstNuvDemux * nuv, nuv_frame_header ** h_ret)
{
unsigned char *data;
nuv_frame_header *h;
GstBuffer *buf = NULL;
GstFlowReturn res = gst_nuv_demux_read_bytes (nuv, 12, TRUE, &buf);
if (res != GST_FLOW_OK) {
if (buf != NULL) {
gst_buffer_unref (buf);
}
return res;
}
h = g_new0 (nuv_frame_header, 1);
data = buf->data;
h->i_type = data[0];
h->i_compression = data[1];
h->i_keyframe = data[2];
h->i_filters = data[3];
h->i_timecode = GST_READ_UINT32_LE (&data[4]);
h->i_length = GST_READ_UINT32_LE (&data[8]);
GST_DEBUG_OBJECT (nuv, "frame hdr: t=%c c=%c k=%d f=0x%x timecode=%d l=%d",
h->i_type,
h->i_compression ? h->i_compression : ' ',
h->i_keyframe ? h->i_keyframe : ' ',
h->i_filters, h->i_timecode, h->i_length);
*h_ret = h;
gst_buffer_unref (buf);
return GST_FLOW_OK;
}
static GstFlowReturn
gst_nuv_demux_extended_header_load (GstNuvDemux * nuv,
nuv_extended_header ** h_ret)
{
unsigned char *data;
GstBuffer *buff = NULL;
nuv_extended_header *h;
GstFlowReturn res = gst_nuv_demux_read_bytes (nuv, 512, TRUE, &buff);
if (res != GST_FLOW_OK) {
if (buff != NULL) {
gst_buffer_unref (buff);
}
return res;
}
h = g_new0 (nuv_extended_header, 1);
data = buff->data;
h->i_version = GST_READ_UINT32_LE (&data[0]);
h->i_video_fcc = GST_MAKE_FOURCC (data[4], data[5], data[6], data[7]);
h->i_audio_fcc = GST_MAKE_FOURCC (data[8], data[9], data[10], data[11]);
h->i_audio_sample_rate = GST_READ_UINT32_LE (&data[12]);
h->i_audio_bits_per_sample = GST_READ_UINT32_LE (&data[16]);
h->i_audio_channels = GST_READ_UINT32_LE (&data[20]);
h->i_audio_compression_ratio = GST_READ_UINT32_LE (&data[24]);
h->i_audio_quality = GST_READ_UINT32_LE (&data[28]);
h->i_rtjpeg_quality = GST_READ_UINT32_LE (&data[32]);
h->i_rtjpeg_luma_filter = GST_READ_UINT32_LE (&data[36]);
h->i_rtjpeg_chroma_filter = GST_READ_UINT32_LE (&data[40]);
h->i_lavc_bitrate = GST_READ_UINT32_LE (&data[44]);
h->i_lavc_qmin = GST_READ_UINT32_LE (&data[48]);
h->i_lavc_qmin = GST_READ_UINT32_LE (&data[52]);
h->i_lavc_maxqdiff = GST_READ_UINT32_LE (&data[56]);
h->i_seekable_offset = GST_READ_UINT64_LE (&data[60]);
h->i_keyframe_adjust_offset = GST_READ_UINT64_LE (&data[68]);
GST_DEBUG_OBJECT (nuv,
"ex hdr: v=%d vffc=%4.4s afcc=%4.4s %dHz %dbits ach=%d acr=%d aq=%d"
"rtjpeg q=%d lf=%d lc=%d lavc br=%d qmin=%d qmax=%d maxqdiff=%d seekableoff=%"
G_GINT64_FORMAT " keyfao=%" G_GINT64_FORMAT, h->i_version,
(gchar *) & h->i_video_fcc, (gchar *) & h->i_audio_fcc,
h->i_audio_sample_rate, h->i_audio_bits_per_sample, h->i_audio_channels,
h->i_audio_compression_ratio, h->i_audio_quality, h->i_rtjpeg_quality,
h->i_rtjpeg_luma_filter, h->i_rtjpeg_chroma_filter, h->i_lavc_bitrate,
h->i_lavc_qmin, h->i_lavc_qmax, h->i_lavc_maxqdiff, h->i_seekable_offset,
h->i_keyframe_adjust_offset);
*h_ret = h;
gst_buffer_unref (buff);
return res;
}
static gboolean
gst_nuv_demux_handle_src_event (GstPad * pad, GstEvent * event)
{
gst_event_unref (event);
return FALSE;
}
static void
gst_nuv_demux_create_pads (GstNuvDemux * nuv)
{
if (nuv->h->i_video_blocks != 0) {
GstCaps *video_caps = NULL;
nuv->src_video_pad =
gst_pad_new_from_static_template (&video_src_template, "video_src");
video_caps = gst_caps_new_simple ("video/x-divx",
"divxversion", G_TYPE_INT, 4,
"width", G_TYPE_INT, nuv->h->i_width,
"height", G_TYPE_INT, nuv->h->i_height,
"framerate", GST_TYPE_FRACTION, (gint) (nuv->h->d_fps * 1000.0f), 1000,
"pixel-aspect-ratio", GST_TYPE_FRACTION,
(gint) (nuv->h->d_aspect * 1000.0f), 1000, NULL);
gst_pad_use_fixed_caps (nuv->src_video_pad);
gst_pad_set_active (nuv->src_video_pad, TRUE);
gst_pad_set_caps (nuv->src_video_pad, video_caps);
gst_pad_set_event_function (nuv->src_video_pad,
gst_nuv_demux_handle_src_event);
gst_pad_set_active (nuv->src_video_pad, TRUE);
gst_element_add_pad (GST_ELEMENT (nuv), nuv->src_video_pad);
gst_caps_unref (video_caps);
}
if (nuv->h->i_audio_blocks != 0) {
GstCaps *audio_caps = NULL;
nuv->src_audio_pad =
gst_pad_new_from_static_template (&audio_src_template, "audio_src");
audio_caps = gst_caps_new_simple ("audio/mpeg",
"rate", G_TYPE_INT, nuv->eh->i_audio_sample_rate,
"format", GST_TYPE_FOURCC, nuv->eh->i_audio_fcc,
"channels", G_TYPE_INT, nuv->eh->i_audio_channels,
"mpegversion", G_TYPE_INT, nuv->eh->i_version, NULL);
gst_pad_use_fixed_caps (nuv->src_audio_pad);
gst_pad_set_active (nuv->src_audio_pad, TRUE);
gst_pad_set_caps (nuv->src_audio_pad, audio_caps);
gst_pad_set_active (nuv->src_audio_pad, TRUE);
gst_element_add_pad (GST_ELEMENT (nuv), nuv->src_audio_pad);
gst_pad_set_event_function (nuv->src_audio_pad,
gst_nuv_demux_handle_src_event);
gst_caps_unref (audio_caps);
}
gst_element_no_more_pads (GST_ELEMENT (nuv));
}
static GstFlowReturn
gst_nuv_demux_read_head_frame (GstNuvDemux * nuv)
{
GstFlowReturn ret = GST_FLOW_OK;
ret = gst_nuv_demux_frame_header_load (nuv, &nuv->fh);
if (ret != GST_FLOW_OK)
return ret;
nuv->state = GST_NUV_DEMUX_MOVI;
return ret;
}
static GstFlowReturn
gst_nuv_demux_stream_data (GstNuvDemux * nuv)
{
GstFlowReturn ret = GST_FLOW_OK;
GstBuffer *buf = NULL;
nuv_frame_header *h = nuv->fh;
if (h->i_type == 'R')
goto done;
if (h->i_length > 0) {
ret = gst_nuv_demux_read_bytes (nuv, h->i_length, TRUE, &buf);
if (ret != GST_FLOW_OK)
return ret;
if (h->i_timecode > 0)
GST_BUFFER_TIMESTAMP (buf) = h->i_timecode * GST_MSECOND;
}
switch (h->i_type) {
case 'V':
{
if (!buf)
break;
GST_BUFFER_OFFSET (buf) = nuv->video_offset;
gst_buffer_set_caps (buf, GST_PAD_CAPS (nuv->src_video_pad));
ret = gst_pad_push (nuv->src_video_pad, buf);
nuv->video_offset++;
break;
}
case 'A':
{
if (!buf)
break;
GST_BUFFER_OFFSET (buf) = nuv->audio_offset;
gst_buffer_set_caps (buf, GST_PAD_CAPS (nuv->src_audio_pad));
ret = gst_pad_push (nuv->src_audio_pad, buf);
nuv->audio_offset++;
break;
}
case 'S':
{
switch (h->i_compression) {
case 'V':
gst_pad_push_event (nuv->src_video_pad,
gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0, -1,
h->i_timecode));
break;
case 'A':
gst_pad_push_event (nuv->src_audio_pad,
gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0, -1, 0));
break;
default:
break;
}
}
default:
if (buf != NULL)
gst_buffer_unref (buf);
break;
}
done:
nuv->state = GST_NUV_DEMUX_FRAME_HEADER;
g_free (nuv->fh);
nuv->fh = NULL;
return ret;
}
static GstFlowReturn
gst_nuv_demux_stream_mpeg_data (GstNuvDemux * nuv)
{
GstFlowReturn ret = GST_FLOW_OK;
/* ffmpeg extra data */
nuv->mpeg_buffer = NULL;
ret =
gst_nuv_demux_read_bytes (nuv, nuv->mpeg_data_size, TRUE,
&nuv->mpeg_buffer);
if (ret != GST_FLOW_OK) {
return GST_FLOW_ERROR;
}
GST_BUFFER_SIZE (nuv->mpeg_buffer) = nuv->mpeg_data_size;
nuv->state = GST_NUV_DEMUX_EXTEND_HEADER;
return ret;
}
static GstFlowReturn
gst_nuv_demux_stream_extra_data (GstNuvDemux * nuv)
{
GstFlowReturn ret = GST_FLOW_OK;
/* Load 'D' */
nuv_frame_header *h;
ret = gst_nuv_demux_frame_header_load (nuv, &h);
if (ret != GST_FLOW_OK)
return ret;
if (h->i_type != 'D') {
g_free (h);
return GST_FLOW_ERROR;
}
if (h->i_length > 0) {
if (h->i_compression == 'F') {
nuv->state = GST_NUV_DEMUX_MPEG_DATA;
} else {
g_free (h);
return GST_FLOW_ERROR;
}
} else {
nuv->state = GST_NUV_DEMUX_EXTEND_HEADER;
}
g_free (h);
h = NULL;
return ret;
}
static GstFlowReturn
gst_nuv_demux_stream_extend_header_data (GstNuvDemux * nuv)
{
GstFlowReturn ret = GST_FLOW_OK;
ret = gst_nuv_demux_extended_header_load (nuv, &nuv->eh);
if (ret != GST_FLOW_OK)
return ret;
gst_nuv_demux_create_pads (nuv);
nuv->state = GST_NUV_DEMUX_FRAME_HEADER;
return ret;
}
static GstFlowReturn
gst_nuv_demux_stream_extend_header (GstNuvDemux * nuv)
{
GstBuffer *buf = NULL;
GstFlowReturn res = GST_FLOW_OK;
res = gst_nuv_demux_read_bytes (nuv, 1, FALSE, &buf);
if (res != GST_FLOW_OK) {
if (buf != NULL) {
gst_buffer_unref (buf);
}
return res;
}
if (buf->data[0] == 'X') {
nuv_frame_header *h = NULL;
gst_buffer_unref (buf);
buf = NULL;
res = gst_nuv_demux_frame_header_load (nuv, &h);
if (res != GST_FLOW_OK)
return res;
if (h->i_length != 512) {
g_free (h);
return GST_FLOW_ERROR;
}
g_free (h);
h = NULL;
nuv->state = GST_NUV_DEMUX_EXTEND_HEADER_DATA;
} else {
nuv->state = GST_NUV_DEMUX_INVALID_DATA;
GST_ELEMENT_ERROR (nuv, STREAM, DEMUX, (NULL),
("Unsupported extended header (0x%02x)", buf->data[0]));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
return res;
}
static GstFlowReturn
gst_nuv_demux_play (GstPad * pad)
{
GstFlowReturn res = GST_FLOW_OK;
GstNuvDemux *nuv = GST_NUV_DEMUX (GST_PAD_PARENT (pad));
switch (nuv->state) {
case GST_NUV_DEMUX_START:
res = gst_nuv_demux_stream_file_header (nuv);
if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {
goto pause;
}
if (nuv->state != GST_NUV_DEMUX_HEADER_DATA)
break;
case GST_NUV_DEMUX_HEADER_DATA:
res = gst_nuv_demux_stream_header_data (nuv);
if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {
goto pause;
}
if (nuv->state != GST_NUV_DEMUX_EXTRA_DATA)
break;
case GST_NUV_DEMUX_EXTRA_DATA:
res = gst_nuv_demux_stream_extra_data (nuv);
if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {
goto pause;
}
if (nuv->state != GST_NUV_DEMUX_MPEG_DATA)
break;
case GST_NUV_DEMUX_MPEG_DATA:
res = gst_nuv_demux_stream_mpeg_data (nuv);
if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {
goto pause;
}
if (nuv->state != GST_NUV_DEMUX_EXTEND_HEADER)
break;
case GST_NUV_DEMUX_EXTEND_HEADER:
res = gst_nuv_demux_stream_extend_header (nuv);
if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {
goto pause;
}
if (nuv->state != GST_NUV_DEMUX_EXTEND_HEADER_DATA)
break;
case GST_NUV_DEMUX_EXTEND_HEADER_DATA:
res = gst_nuv_demux_stream_extend_header_data (nuv);
if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {
goto pause;
}
if (nuv->state != GST_NUV_DEMUX_FRAME_HEADER)
break;
case GST_NUV_DEMUX_FRAME_HEADER:
res = gst_nuv_demux_read_head_frame (nuv);
if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {
goto pause;
}
if (nuv->state != GST_NUV_DEMUX_MOVI)
break;
case GST_NUV_DEMUX_MOVI:
res = gst_nuv_demux_stream_data (nuv);
if ((res != GST_FLOW_OK) && (res != GST_FLOW_CUSTOM_ERROR)) {
goto pause;
}
break;
case GST_NUV_DEMUX_INVALID_DATA:
goto pause;
default:
g_assert_not_reached ();
}
GST_DEBUG_OBJECT (nuv, "state: %d res:%s", nuv->state,
gst_flow_get_name (res));
return GST_FLOW_OK;
pause:
GST_LOG_OBJECT (nuv, "pausing task, reason %s", gst_flow_get_name (res));
gst_pad_pause_task (nuv->sinkpad);
if (res == GST_FLOW_UNEXPECTED) {
gst_nuv_demux_send_eos (nuv);
} else if (res == GST_FLOW_NOT_LINKED || res < GST_FLOW_UNEXPECTED) {
GST_ELEMENT_FLOW_ERROR (nuv, res);
gst_nuv_demux_send_eos (nuv);
}
return res;
}
static void
gst_nuv_demux_send_eos (GstNuvDemux * nuv)
{
gst_element_post_message (GST_ELEMENT (nuv),
gst_message_new_segment_done (GST_OBJECT (nuv), GST_FORMAT_TIME, -1));
if (nuv->src_video_pad)
gst_pad_push_event (nuv->src_video_pad, gst_event_new_eos ());
if (nuv->src_audio_pad)
gst_pad_push_event (nuv->src_audio_pad, gst_event_new_eos ());
}
static GstFlowReturn
gst_nuv_demux_read_bytes (GstNuvDemux * nuv, guint64 size, gboolean move,
GstBuffer ** buffer)
{
GstFlowReturn ret = GST_FLOW_OK;
if (size == 0) {
*buffer = gst_buffer_new ();
return ret;
}
if (nuv->mode == 0) {
ret = gst_pad_pull_range (nuv->sinkpad, nuv->offset, size, buffer);
if (ret == GST_FLOW_OK) {
if (move) {
nuv->offset += size;
}
/* got eos */
} else if (ret == GST_FLOW_UNEXPECTED) {
gst_nuv_demux_send_eos (nuv);
return GST_FLOW_FLUSHING;
}
} else {
if (gst_adapter_available (nuv->adapter) < size)
return GST_FLOW_ERROR_NO_DATA;
if (move) {
*buffer = gst_adapter_take_buffer (nuv->adapter, size);
} else {
guint8 *data = NULL;
data = (guint8 *) gst_adapter_peek (nuv->adapter, size);
*buffer = gst_buffer_new ();
gst_buffer_set_data (*buffer, data, size);
}
}
return ret;
}
static gboolean
gst_nuv_demux_sink_activate (GstPad * sinkpad)
{
gboolean res = TRUE;
GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));
if (gst_pad_check_pull_range (sinkpad)) {
nuv->mode = 0;
if (nuv->adapter != NULL) {
g_object_unref (nuv->adapter);
nuv->adapter = NULL;
}
res = gst_pad_activate_pull (sinkpad, TRUE);
} else {
nuv->mode = 1;
if (!nuv->adapter) {
nuv->adapter = gst_adapter_new ();
}
res = gst_pad_activate_push (sinkpad, TRUE);
}
g_object_unref (nuv);
return res;
}
static gboolean
gst_nuv_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)
{
GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));
if (active) {
gst_pad_start_task (sinkpad, (GstTaskFunction) gst_nuv_demux_loop, sinkpad,
NULL);
} else {
gst_pad_stop_task (sinkpad);
}
gst_object_unref (nuv);
return TRUE;
}
static GstFlowReturn
gst_nuv_demux_chain (GstPad * pad, GstBuffer * buf)
{
GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));
gst_adapter_push (nuv->adapter, buf);
return gst_nuv_demux_play (pad);
}
static void
gst_nuv_demux_loop (GstPad * pad)
{
gst_nuv_demux_play (pad);
}
static void
gst_nuv_demux_reset (GstNuvDemux * nuv)
{
nuv->state = GST_NUV_DEMUX_START;
nuv->mode = 0;
nuv->offset = 0;
nuv->video_offset = 0;
nuv->audio_offset = 0;
if (nuv->adapter != NULL)
gst_adapter_clear (nuv->adapter);
if (nuv->mpeg_buffer != NULL) {
gst_buffer_unref (nuv->mpeg_buffer);
nuv->mpeg_buffer = NULL;
}
g_free (nuv->h);
nuv->h = NULL;
g_free (nuv->eh);
nuv->eh = NULL;
g_free (nuv->fh);
nuv->fh = NULL;
}
static void
gst_nuv_demux_destoy_src_pad (GstNuvDemux * nuv)
{
if (nuv->src_video_pad) {
gst_element_remove_pad (GST_ELEMENT (nuv), nuv->src_video_pad);
nuv->src_video_pad = NULL;
}
if (nuv->src_audio_pad) {
gst_element_remove_pad (GST_ELEMENT (nuv), nuv->src_audio_pad);
nuv->src_audio_pad = NULL;
}
}
static GstStateChangeReturn
gst_nuv_demux_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
goto done;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (element));
gst_nuv_demux_reset (GST_NUV_DEMUX (element));
break;
default:
break;
}
done:
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (nuvdemux_debug, "nuvdemux",
0, "Demuxer for NUV streams");
#ifdef ENABLE_NLS
GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
LOCALEDIR);
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
#endif /* ENABLE_NLS */
if (!gst_element_register (plugin, "nuvdemux", GST_RANK_SECONDARY,
GST_TYPE_NUV_DEMUX)) {
return FALSE;
}
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
nuvdemux,
"Demuxes MythTV NuppelVideo files",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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