static inline gboolean
gst_jpeg_parse_app1 (GstJpegParse * parse, GstByteReader * reader)
{
guint16 size = 0;
const gchar *id_str;
const guint8 *data = NULL;
if (!gst_byte_reader_get_uint16_be (reader, &size))
return FALSE;
size -= 2; /* 2 bytes for the mark */
if (!gst_byte_reader_peek_string_utf8 (reader, &id_str))
return FALSE;
if (!strncmp (id_str, "Exif", 4)) {
/* skip id + NUL + padding */
if (!gst_byte_reader_skip (reader, 6))
return FALSE;
size -= 6;
/* handle exif metadata */
if (!gst_byte_reader_get_data (reader, size, &data))
return FALSE;
extract_and_queue_tags (parse, size, (guint8 *) data,
gst_tag_list_from_exif_buffer_with_tiff_header);
GST_LOG_OBJECT (parse, "parsed marker %x: '%s' %u bytes",
APP1, id_str, size);
} else if (!strncmp (id_str, "http://ns.adobe.com/xap/1.0/", 28)) {
/* skip the id + NUL */
if (!gst_byte_reader_skip (reader, 29))
return FALSE;
size -= 29;
/* handle xmp metadata */
if (!gst_byte_reader_get_data (reader, size, &data))
return FALSE;
extract_and_queue_tags (parse, size, (guint8 *) data,
gst_tag_list_from_xmp_buffer);
GST_LOG_OBJECT (parse, "parsed marker %x: '%s' %u bytes",
APP1, id_str, size);
} else {
if (!gst_jpeg_parse_skip_marker (parse, reader, APP1))
return FALSE;
}
return TRUE;
}
GstMoofBox *
gst_isoff_moof_box_parse (GstByteReader * reader)
{
GstMoofBox *moof;
gboolean had_mfhd = FALSE;
moof = g_new0 (GstMoofBox, 1);
moof->traf = g_array_new (FALSE, FALSE, sizeof (GstTrafBox));
g_array_set_clear_func (moof->traf,
(GDestroyNotify) gst_isoff_traf_box_clear);
while (gst_byte_reader_get_remaining (reader) > 0) {
guint32 fourcc;
guint header_size;
guint64 size;
if (!gst_isoff_parse_box_header (reader, &fourcc, NULL, &header_size,
&size))
goto error;
if (gst_byte_reader_get_remaining (reader) < size - header_size)
goto error;
switch (fourcc) {
case GST_ISOFF_FOURCC_MFHD:{
GstByteReader sub_reader;
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_mfhd_box_parse (&moof->mfhd, &sub_reader))
goto error;
had_mfhd = TRUE;
break;
}
case GST_ISOFF_FOURCC_TRAF:{
GstByteReader sub_reader;
GstTrafBox traf;
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_traf_box_parse (&traf, &sub_reader))
goto error;
g_array_append_val (moof->traf, traf);
break;
}
default:
gst_byte_reader_skip (reader, size - header_size);
break;
}
}
if (!had_mfhd)
goto error;
return moof;
error:
gst_isoff_moof_box_free (moof);
return NULL;
}
static guint
find_psc (GstBuffer * buffer, guint skip)
{
GstByteReader br;
guint psc_pos = -1, psc;
gst_byte_reader_init_from_buffer (&br, buffer);
if (!gst_byte_reader_set_pos (&br, skip))
goto out;
gst_byte_reader_peek_uint24_be (&br, &psc);
/* Scan for the picture start code (22 bits - 0x0020) */
while ((gst_byte_reader_get_remaining (&br) >= 3)) {
if (gst_byte_reader_peek_uint24_be (&br, &psc) &&
((psc & 0xffffc0) == 0x000080)) {
psc_pos = gst_byte_reader_get_pos (&br);
break;
} else
gst_byte_reader_skip (&br, 1);
}
out:
return psc_pos;
}
static inline gboolean
gst_jpeg_parse_skip_marker (GstJpegParse * parse,
GstByteReader * reader, guint8 marker)
{
guint16 size = 0;
if (!gst_byte_reader_get_uint16_be (reader, &size))
return FALSE;
#ifndef GST_DISABLE_DEBUG
/* We'd pry the id of the skipped application segment */
if (marker >= APP0 && marker <= APP15) {
const gchar *id_str = NULL;
if (gst_byte_reader_peek_string_utf8 (reader, &id_str)) {
GST_DEBUG_OBJECT (parse, "unhandled marker %x: '%s' skiping %u bytes",
marker, id_str ? id_str : "(NULL)", size);
} else {
GST_DEBUG_OBJECT (parse, "unhandled marker %x skiping %u bytes", marker,
size);
}
}
#else
GST_DEBUG_OBJECT (parse, "unhandled marker %x skiping %u bytes", marker,
size);
#endif // GST_DISABLE_DEBUG
if (!gst_byte_reader_skip (reader, size - 2))
return FALSE;
return TRUE;
}
static gboolean
gst_isoff_traf_box_parse (GstTrafBox * traf, GstByteReader * reader)
{
gboolean had_tfhd = FALSE;
memset (traf, 0, sizeof (*traf));
traf->trun = g_array_new (FALSE, FALSE, sizeof (GstTrunBox));
g_array_set_clear_func (traf->trun,
(GDestroyNotify) gst_isoff_trun_box_clear);
while (gst_byte_reader_get_remaining (reader) > 0) {
guint32 fourcc;
guint header_size;
guint64 size;
if (!gst_isoff_parse_box_header (reader, &fourcc, NULL, &header_size,
&size))
goto error;
if (gst_byte_reader_get_remaining (reader) < size - header_size)
goto error;
switch (fourcc) {
case GST_ISOFF_FOURCC_TFHD:{
GstByteReader sub_reader;
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_tfhd_box_parse (&traf->tfhd, &sub_reader))
goto error;
had_tfhd = TRUE;
break;
}
case GST_ISOFF_FOURCC_TRUN:{
GstByteReader sub_reader;
GstTrunBox trun;
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_trun_box_parse (&trun, &sub_reader))
goto error;
g_array_append_val (traf->trun, trun);
break;
}
default:
gst_byte_reader_skip (reader, size - header_size);
break;
}
}
if (!had_tfhd)
goto error;
return TRUE;
error:
gst_isoff_traf_box_clear (traf);
return FALSE;
}
static guint
find_psc (GstBuffer * buffer, guint skip)
{
GstMapInfo map;
GstByteReader br;
guint psc_pos = -1, psc;
gst_buffer_map (buffer, &map, GST_MAP_READ);
gst_byte_reader_init (&br, map.data, map.size);
if (!gst_byte_reader_set_pos (&br, skip))
goto out;
if (gst_byte_reader_peek_uint24_be (&br, &psc) == FALSE)
goto out;
/* Scan for the picture start code (22 bits - 0x0020) */
while ((gst_byte_reader_get_remaining (&br) >= 3)) {
if (gst_byte_reader_peek_uint24_be (&br, &psc) &&
((psc & 0xffffc0) == 0x000080)) {
psc_pos = gst_byte_reader_get_pos (&br);
break;
} else if (gst_byte_reader_skip (&br, 1) == FALSE)
break;
}
out:
gst_buffer_unmap (buffer, &map);
return psc_pos;
}
static GstFlowReturn
gst_asf_parse_parse_data_object (GstAsfParse * asfparse, GstBuffer * buffer)
{
GstByteReader *reader;
GstFlowReturn ret = GST_FLOW_OK;
guint64 packet_count = 0;
GstMapInfo map;
GST_DEBUG_OBJECT (asfparse, "Parsing data object");
gst_buffer_map (buffer, &map, GST_MAP_READ);
reader = gst_byte_reader_new (map.data, map.size);
/* skip to packet count */
if (!gst_byte_reader_skip (reader, 40))
goto error;
if (!gst_byte_reader_get_uint64_le (reader, &packet_count))
goto error;
if (asfparse->asfinfo->packets_count != packet_count) {
GST_WARNING_OBJECT (asfparse, "File properties object and data object have "
"different packets count, %" G_GUINT64_FORMAT " %" G_GUINT64_FORMAT,
asfparse->asfinfo->packets_count, packet_count);
} else {
GST_DEBUG_OBJECT (asfparse, "Total packets: %" G_GUINT64_FORMAT,
packet_count);
}
gst_buffer_unmap (buffer, &map);
gst_byte_reader_free (reader);
return gst_asf_parse_push (asfparse, buffer);
error:
ret = GST_FLOW_ERROR;
GST_ERROR_OBJECT (asfparse, "Error while parsing data object headers");
gst_buffer_unmap (buffer, &map);
gst_byte_reader_free (reader);
return ret;
}
static gboolean
gst_dirac_parse_check_valid_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, guint * framesize, gint * skipsize)
{
GstByteReader reader = GST_BYTE_READER_INIT_FROM_BUFFER (frame->buffer);
GstDiracParse *diracparse = GST_DIRAC_PARSE (parse);
int off;
guint32 next_header;
gboolean sync;
gboolean drain;
if (G_UNLIKELY (GST_BUFFER_SIZE (frame->buffer) < 13))
return FALSE;
off = gst_byte_reader_masked_scan_uint32 (&reader, 0xffffffff,
0x42424344, 0, GST_BUFFER_SIZE (frame->buffer));
if (off < 0) {
*skipsize = GST_BUFFER_SIZE (frame->buffer) - 3;
return FALSE;
}
GST_LOG_OBJECT (parse, "possible sync at buffer offset %d", off);
if (off > 0) {
GST_ERROR ("skipping %d", off);
*skipsize = off;
return FALSE;
}
if (!gst_dirac_parse_frame_header (diracparse, frame->buffer, framesize)) {
GST_ERROR ("bad header");
*skipsize = 3;
return FALSE;
}
GST_LOG ("framesize %d", *framesize);
sync = GST_BASE_PARSE_FRAME_SYNC (frame);
drain = GST_BASE_PARSE_FRAME_DRAIN (frame);
if (!sync && !drain) {
guint32 next_sync_word = 0;
next_header = GST_READ_UINT32_BE (GST_BUFFER_DATA (frame->buffer) + 5);
GST_LOG ("next header %d", next_header);
if (!gst_byte_reader_skip (&reader, next_header) ||
!gst_byte_reader_get_uint32_be (&reader, &next_sync_word)) {
gst_base_parse_set_min_frame_size (parse, next_header + 4);
*skipsize = 0;
return FALSE;
} else {
if (next_sync_word != 0x42424344) {
*skipsize = 3;
return FALSE;
} else {
gst_base_parse_set_min_frame_size (parse, next_header);
}
}
}
return TRUE;
}
static gboolean
gst_jpeg_parse_read_header (GstJpegParse * parse, GstBuffer * buffer)
{
GstByteReader reader = GST_BYTE_READER_INIT_FROM_BUFFER (buffer);
guint8 marker = 0;
gboolean foundSOF = FALSE;
if (!gst_byte_reader_peek_uint8 (&reader, &marker))
goto error;
while (marker == 0xff) {
if (!gst_byte_reader_skip (&reader, 1))
goto error;
if (!gst_byte_reader_get_uint8 (&reader, &marker))
goto error;
GST_DEBUG_OBJECT (parse, "marker = %x", marker);
switch (marker) {
case SOS: /* start of scan (begins compressed data) */
return foundSOF;
case SOI:
break;
case DRI:
if (!gst_byte_reader_skip (&reader, 4)) /* fixed size */
goto error;
break;
case COM:
if (!gst_jpeg_parse_com (parse, &reader))
goto error;
break;
case APP1:
if (!gst_jpeg_parse_app1 (parse, &reader))
goto error;
break;
case DHT:
case DQT:
/* Ignore these codes */
if (!gst_jpeg_parse_skip_marker (parse, &reader, marker))
goto error;
break;
case SOF2:
parse->priv->interlaced = TRUE;
/* fall through */
case SOF0:
foundSOF = TRUE;
/* parse Start Of Frame */
if (!gst_jpeg_parse_sof (parse, &reader))
goto error;
return TRUE;
default:
if (marker == JPG || (marker >= JPG0 && marker <= JPG13)) {
/* we'd like to remove them from the buffer */
if (!gst_jpeg_parse_remove_marker (parse, &reader, marker, buffer))
goto error;
} else if (marker >= APP0 && marker <= APP15) {
if (!gst_jpeg_parse_skip_marker (parse, &reader, marker))
goto error;
} else {
GST_WARNING_OBJECT (parse, "unhandled marker %x, leaving", marker);
/* Not SOF or SOI. Must not be a JPEG file (or file pointer
* is placed wrong). In either case, it's an error. */
return FALSE;
}
}
if (!gst_byte_reader_peek_uint8 (&reader, &marker))
goto error;
}
return foundSOF;
error:
GST_WARNING_OBJECT (parse,
"Error parsing image header (need more than %u bytes available)",
gst_byte_reader_get_remaining (&reader));
return FALSE;
}
static gboolean
gst_ac3_parse_check_valid_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, guint * framesize, gint * skipsize)
{
GstAc3Parse *ac3parse = GST_AC3_PARSE (parse);
GstBuffer *buf = frame->buffer;
GstByteReader reader = GST_BYTE_READER_INIT_FROM_BUFFER (buf);
gint off;
gboolean lost_sync, draining, eac, more = FALSE;
guint frmsiz, blocks, sid;
gint have_blocks = 0;
if (G_UNLIKELY (GST_BUFFER_SIZE (buf) < 6))
return FALSE;
off = gst_byte_reader_masked_scan_uint32 (&reader, 0xffff0000, 0x0b770000,
0, GST_BUFFER_SIZE (buf));
GST_LOG_OBJECT (parse, "possible sync at buffer offset %d", off);
/* didn't find anything that looks like a sync word, skip */
if (off < 0) {
*skipsize = GST_BUFFER_SIZE (buf) - 3;
return FALSE;
}
/* possible frame header, but not at offset 0? skip bytes before sync */
if (off > 0) {
*skipsize = off;
return FALSE;
}
/* make sure the values in the frame header look sane */
if (!gst_ac3_parse_frame_header (ac3parse, buf, 0, &frmsiz, NULL, NULL,
&blocks, &sid, &eac)) {
*skipsize = off + 2;
return FALSE;
}
*framesize = frmsiz;
if (G_UNLIKELY (g_atomic_int_get (&ac3parse->align) ==
GST_AC3_PARSE_ALIGN_NONE))
gst_ac3_parse_set_alignment (ac3parse, eac);
GST_LOG_OBJECT (parse, "got frame");
lost_sync = GST_BASE_PARSE_LOST_SYNC (parse);
draining = GST_BASE_PARSE_DRAINING (parse);
if (g_atomic_int_get (&ac3parse->align) == GST_AC3_PARSE_ALIGN_IEC61937) {
/* We need 6 audio blocks from each substream, so we keep going forwards
* till we have it */
g_assert (blocks > 0);
GST_LOG_OBJECT (ac3parse, "Need %d frames before pushing", 6 / blocks);
if (sid != 0) {
/* We need the first substream to be the one with id 0 */
GST_LOG_OBJECT (ac3parse, "Skipping till we find sid 0");
*skipsize = off + 2;
return FALSE;
}
*framesize = 0;
/* Loop till we have 6 blocks per substream */
for (have_blocks = 0; !more && have_blocks < 6; have_blocks += blocks) {
/* Loop till we get one frame from each substream */
do {
*framesize += frmsiz;
if (!gst_byte_reader_skip (&reader, frmsiz) ||
GST_BUFFER_SIZE (buf) < (*framesize + 6)) {
more = TRUE;
break;
}
if (!gst_ac3_parse_frame_header (ac3parse, buf, *framesize, &frmsiz,
NULL, NULL, NULL, &sid, &eac)) {
*skipsize = off + 2;
return FALSE;
}
} while (sid);
}
/* We're now at the next frame, so no need to skip if resyncing */
frmsiz = 0;
}
if (lost_sync && !draining) {
guint16 word = 0;
GST_DEBUG_OBJECT (ac3parse, "resyncing; checking next frame syncword");
if (more || !gst_byte_reader_skip (&reader, frmsiz) ||
!gst_byte_reader_get_uint16_be (&reader, &word)) {
GST_DEBUG_OBJECT (ac3parse, "... but not sufficient data");
gst_base_parse_set_min_frame_size (parse, *framesize + 6);
*skipsize = 0;
return FALSE;
} else {
if (word != 0x0b77) {
GST_DEBUG_OBJECT (ac3parse, "0x%x not OK", word);
*skipsize = off + 2;
return FALSE;
} else {
/* ok, got sync now, let's assume constant frame size */
gst_base_parse_set_min_frame_size (parse, *framesize);
}
}
}
return TRUE;
}
static GstFlowReturn
gst_pngdec_parse (GstVideoDecoder * decoder, GstVideoCodecFrame * frame,
GstAdapter * adapter, gboolean at_eos)
{
gsize toadd = 0;
GstByteReader reader;
gconstpointer data;
guint64 signature;
gsize size;
GstPngDec *pngdec = (GstPngDec *) decoder;
GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
/* FIXME : The overhead of using scan_uint32 is massive */
size = gst_adapter_available (adapter);
GST_DEBUG ("Parsing PNG image data (%" G_GSIZE_FORMAT " bytes)", size);
if (size < 8)
goto need_more_data;
data = gst_adapter_map (adapter, size);
gst_byte_reader_init (&reader, data, size);
if (pngdec->read_data == 0) {
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto need_more_data;
if (signature != PNG_SIGNATURE) {
for (;;) {
guint offset;
offset = gst_byte_reader_masked_scan_uint32 (&reader, 0xffffffff,
0x89504E47, 0, gst_byte_reader_get_remaining (&reader));
if (offset == -1) {
gst_adapter_flush (adapter,
gst_byte_reader_get_remaining (&reader) - 4);
goto need_more_data;
}
if (!gst_byte_reader_skip (&reader, offset))
goto need_more_data;
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto need_more_data;
if (signature == PNG_SIGNATURE) {
/* We're skipping, go out, we'll be back */
gst_adapter_flush (adapter, gst_byte_reader_get_pos (&reader));
goto need_more_data;
}
if (!gst_byte_reader_skip (&reader, 4))
goto need_more_data;
}
}
pngdec->read_data = 8;
}
if (!gst_byte_reader_skip (&reader, pngdec->read_data))
goto need_more_data;
for (;;) {
guint32 length;
guint32 code;
if (!gst_byte_reader_get_uint32_be (&reader, &length))
goto need_more_data;
if (!gst_byte_reader_get_uint32_le (&reader, &code))
goto need_more_data;
if (!gst_byte_reader_skip (&reader, length + 4))
goto need_more_data;
if (code == GST_MAKE_FOURCC ('I', 'E', 'N', 'D')) {
/* Have complete frame */
toadd = gst_byte_reader_get_pos (&reader);
GST_DEBUG_OBJECT (decoder, "Have complete frame of size %" G_GSIZE_FORMAT,
toadd);
pngdec->read_data = 0;
goto have_full_frame;
} else
pngdec->read_data += length + 12;
}
g_assert_not_reached ();
return GST_FLOW_ERROR;
need_more_data:
return GST_VIDEO_DECODER_FLOW_NEED_DATA;
have_full_frame:
if (toadd)
gst_video_decoder_add_to_frame (decoder, toadd);
return gst_video_decoder_have_frame (decoder);
}
/* Ideas from gstjpegparse.c */
GstTagList *
gst_droidcamsrc_exif_tags_from_jpeg_data (void *data, size_t size)
{
GstByteReader reader;
guint16 len = 0;
const gchar *id;
const guint8 *exif = NULL;
GstBuffer *buff;
GstTagList *tags = NULL;
void *app1 = memmem (data, size, marker, 2);
if (!app1) {
GST_ERROR ("No tags found");
goto out;
}
size -= (app1 - data);
gst_byte_reader_init (&reader, app1, size);
if (!gst_byte_reader_skip (&reader, 2)) {
GST_ERROR ("Not enough jpeg data for tags");
goto out;
}
if (!gst_byte_reader_get_uint16_be (&reader, &len)) {
GST_ERROR ("Failed to get APP1 size");
goto out;
}
len -= 2; /* for the marker itself */
if (!gst_byte_reader_peek_string_utf8 (&reader, &id)) {
goto out;
}
if (!strncmp (id, "Exif", 4)) {
/* id + NUL + padding */
if (!gst_byte_reader_skip (&reader, 6)) {
goto out;
}
len -= 6;
if (!gst_byte_reader_get_data (&reader, len, &exif)) {
goto out;
}
buff =
gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY, (gpointer) exif,
len, 0, len, NULL, NULL);
tags = gst_tag_list_from_exif_buffer_with_tiff_header (buff);
gst_buffer_unref (buff);
return tags;
}
out:
return NULL;
}
static GstFlowReturn
gst_png_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstPngParse *pngparse = GST_PNG_PARSE (parse);
GstMapInfo map;
GstByteReader reader;
GstFlowReturn ret = GST_FLOW_OK;
guint64 signature;
guint width = 0, height = 0;
gst_buffer_map (frame->buffer, &map, GST_MAP_READ);
gst_byte_reader_init (&reader, map.data, map.size);
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto beach;
if (signature != PNG_SIGNATURE) {
for (;;) {
guint offset;
offset = gst_byte_reader_masked_scan_uint32 (&reader, 0xffffffff,
0x89504E47, 0, gst_byte_reader_get_remaining (&reader));
if (offset == -1) {
*skipsize = gst_byte_reader_get_remaining (&reader) - 4;
goto beach;
}
gst_byte_reader_skip (&reader, offset);
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto beach;
if (signature == PNG_SIGNATURE) {
/* We're skipping, go out, we'll be back */
*skipsize = gst_byte_reader_get_pos (&reader);
goto beach;
}
gst_byte_reader_skip (&reader, 4);
}
}
gst_byte_reader_skip (&reader, 8);
for (;;) {
guint32 length;
guint32 code;
if (!gst_byte_reader_get_uint32_be (&reader, &length))
goto beach;
if (!gst_byte_reader_get_uint32_le (&reader, &code))
goto beach;
if (code == GST_MAKE_FOURCC ('I', 'H', 'D', 'R')) {
if (!gst_byte_reader_get_uint32_be (&reader, &width))
goto beach;
if (!gst_byte_reader_get_uint32_be (&reader, &height))
goto beach;
length -= 8;
}
if (!gst_byte_reader_skip (&reader, length + 4))
goto beach;
if (code == GST_MAKE_FOURCC ('I', 'E', 'N', 'D')) {
if (pngparse->width != width || pngparse->height != height) {
GstCaps *caps;
pngparse->height = height;
pngparse->width = width;
caps = gst_caps_new_simple ("image/png",
"width", G_TYPE_INT, width, "height", G_TYPE_INT, height, NULL);
if (!gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (parse), caps)) {
ret = GST_FLOW_NOT_NEGOTIATED;
}
gst_caps_unref (caps);
if (ret != GST_FLOW_OK)
goto beach;
}
gst_buffer_unmap (frame->buffer, &map);
return gst_base_parse_finish_frame (parse, frame,
gst_byte_reader_get_pos (&reader));
}
}
beach:
gst_buffer_unmap (frame->buffer, &map);
return ret;
}
static GstFlowReturn
gst_png_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstPngParse *pngparse = GST_PNG_PARSE (parse);
GstMapInfo map;
GstByteReader reader;
GstFlowReturn ret = GST_FLOW_OK;
guint64 signature;
guint width = 0, height = 0;
gst_buffer_map (frame->buffer, &map, GST_MAP_READ);
gst_byte_reader_init (&reader, map.data, map.size);
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto beach;
if (signature != PNG_SIGNATURE) {
for (;;) {
guint offset;
offset = gst_byte_reader_masked_scan_uint32 (&reader, 0xffffffff,
0x89504E47, 0, gst_byte_reader_get_remaining (&reader));
if (offset == -1) {
*skipsize = gst_byte_reader_get_remaining (&reader) - 4;
goto beach;
}
gst_byte_reader_skip (&reader, offset);
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto beach;
if (signature == PNG_SIGNATURE) {
/* We're skipping, go out, we'll be back */
*skipsize = gst_byte_reader_get_pos (&reader);
goto beach;
}
gst_byte_reader_skip (&reader, 4);
}
}
gst_byte_reader_skip (&reader, 8);
for (;;) {
guint32 length;
guint32 code;
if (!gst_byte_reader_get_uint32_be (&reader, &length))
goto beach;
if (!gst_byte_reader_get_uint32_le (&reader, &code))
goto beach;
if (code == GST_MAKE_FOURCC ('I', 'H', 'D', 'R')) {
if (!gst_byte_reader_get_uint32_be (&reader, &width))
goto beach;
if (!gst_byte_reader_get_uint32_be (&reader, &height))
goto beach;
length -= 8;
}
if (!gst_byte_reader_skip (&reader, length + 4))
goto beach;
if (code == GST_MAKE_FOURCC ('I', 'E', 'N', 'D')) {
if (pngparse->width != width || pngparse->height != height) {
GstStructure *st = NULL;
GstCaps *caps, *sink_caps;
gint fr_num, fr_denom;
pngparse->height = height;
pngparse->width = width;
sink_caps =
gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (pngparse));
if (sink_caps && (st = gst_caps_get_structure (sink_caps, 0))
&& gst_structure_get_fraction (st, "framerate", &fr_num, &fr_denom)) {
/* Got it in caps - nothing more to do */
GST_DEBUG_OBJECT (pngparse,
"sink caps override framerate from headers");
} else {
GST_INFO_OBJECT (pngparse, "No framerate set");
}
caps = gst_caps_new_simple ("image/png",
"width", G_TYPE_INT, width, "height", G_TYPE_INT, height,
"framerate", GST_TYPE_FRACTION, fr_num, fr_denom, NULL);
if (!gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (parse), caps)) {
ret = GST_FLOW_NOT_NEGOTIATED;
}
gst_caps_unref (caps);
if (ret != GST_FLOW_OK)
goto beach;
}
gst_buffer_unmap (frame->buffer, &map);
return gst_base_parse_finish_frame (parse, frame,
gst_byte_reader_get_pos (&reader));
}
}
beach:
gst_buffer_unmap (frame->buffer, &map);
return ret;
}
static GstFlowReturn
gst_flxdec_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstByteReader reader;
GstBuffer *input;
GstMapInfo map_info;
GstCaps *caps;
guint available;
GstFlowReturn res = GST_FLOW_OK;
GstFlxDec *flxdec;
FlxHeader *flxh;
g_return_val_if_fail (buf != NULL, GST_FLOW_ERROR);
flxdec = (GstFlxDec *) parent;
g_return_val_if_fail (flxdec != NULL, GST_FLOW_ERROR);
gst_adapter_push (flxdec->adapter, buf);
available = gst_adapter_available (flxdec->adapter);
input = gst_adapter_get_buffer (flxdec->adapter, available);
if (!gst_buffer_map (input, &map_info, GST_MAP_READ)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Failed to map buffer"), (NULL));
goto error;
}
gst_byte_reader_init (&reader, map_info.data, map_info.size);
if (flxdec->state == GST_FLXDEC_READ_HEADER) {
if (available >= FlxHeaderSize) {
GstByteReader header;
GstCaps *templ;
if (!gst_byte_reader_get_sub_reader (&reader, &header, FlxHeaderSize)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Could not read header"), (NULL));
goto unmap_input_error;
}
gst_adapter_flush (flxdec->adapter, FlxHeaderSize);
available -= FlxHeaderSize;
if (!_read_flx_header (flxdec, &header, &flxdec->hdr)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Failed to parse header"), (NULL));
goto unmap_input_error;
}
flxh = &flxdec->hdr;
/* check header */
if (flxh->type != FLX_MAGICHDR_FLI &&
flxh->type != FLX_MAGICHDR_FLC && flxh->type != FLX_MAGICHDR_FLX) {
GST_ELEMENT_ERROR (flxdec, STREAM, WRONG_TYPE, (NULL),
("not a flx file (type %x)", flxh->type));
goto unmap_input_error;
}
GST_INFO_OBJECT (flxdec, "size : %d", flxh->size);
GST_INFO_OBJECT (flxdec, "frames : %d", flxh->frames);
GST_INFO_OBJECT (flxdec, "width : %d", flxh->width);
GST_INFO_OBJECT (flxdec, "height : %d", flxh->height);
GST_INFO_OBJECT (flxdec, "depth : %d", flxh->depth);
GST_INFO_OBJECT (flxdec, "speed : %d", flxh->speed);
flxdec->next_time = 0;
if (flxh->type == FLX_MAGICHDR_FLI) {
flxdec->frame_time = JIFFIE * flxh->speed;
} else if (flxh->speed == 0) {
flxdec->frame_time = GST_SECOND / 70;
} else {
flxdec->frame_time = flxh->speed * GST_MSECOND;
}
flxdec->duration = flxh->frames * flxdec->frame_time;
GST_LOG ("duration : %" GST_TIME_FORMAT,
GST_TIME_ARGS (flxdec->duration));
templ = gst_pad_get_pad_template_caps (flxdec->srcpad);
caps = gst_caps_copy (templ);
gst_caps_unref (templ);
gst_caps_set_simple (caps,
"width", G_TYPE_INT, flxh->width,
"height", G_TYPE_INT, flxh->height,
"framerate", GST_TYPE_FRACTION, (gint) GST_MSECOND,
(gint) flxdec->frame_time / 1000, NULL);
gst_pad_set_caps (flxdec->srcpad, caps);
gst_caps_unref (caps);
if (flxdec->need_segment) {
gst_pad_push_event (flxdec->srcpad,
gst_event_new_segment (&flxdec->segment));
flxdec->need_segment = FALSE;
}
/* zero means 8 */
if (flxh->depth == 0)
flxh->depth = 8;
if (flxh->depth != 8) {
GST_ELEMENT_ERROR (flxdec, STREAM, WRONG_TYPE,
("%s", "Don't know how to decode non 8 bit depth streams"), (NULL));
goto unmap_input_error;
}
flxdec->converter =
flx_colorspace_converter_new (flxh->width, flxh->height);
if (flxh->type == FLX_MAGICHDR_FLC || flxh->type == FLX_MAGICHDR_FLX) {
GST_INFO_OBJECT (flxdec, "(FLC) aspect_dx : %d", flxh->aspect_dx);
GST_INFO_OBJECT (flxdec, "(FLC) aspect_dy : %d", flxh->aspect_dy);
GST_INFO_OBJECT (flxdec, "(FLC) oframe1 : 0x%08x", flxh->oframe1);
GST_INFO_OBJECT (flxdec, "(FLC) oframe2 : 0x%08x", flxh->oframe2);
}
flxdec->size = ((guint) flxh->width * (guint) flxh->height);
if (flxdec->size >= G_MAXSIZE / 4) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Cannot allocate required memory"), (NULL));
goto unmap_input_error;
}
/* create delta and output frame */
flxdec->frame_data = g_malloc0 (flxdec->size);
flxdec->delta_data = g_malloc0 (flxdec->size);
flxdec->state = GST_FLXDEC_PLAYING;
}
} else if (flxdec->state == GST_FLXDEC_PLAYING) {
GstBuffer *out;
/* while we have enough data in the adapter */
while (available >= FlxFrameChunkSize && res == GST_FLOW_OK) {
guint32 size;
guint16 type;
if (!gst_byte_reader_get_uint32_le (&reader, &size))
goto parse_error;
if (available < size)
goto need_more_data;
available -= size;
gst_adapter_flush (flxdec->adapter, size);
if (!gst_byte_reader_get_uint16_le (&reader, &type))
goto parse_error;
switch (type) {
case FLX_FRAME_TYPE:{
GstByteReader chunks;
GstByteWriter writer;
guint16 n_chunks;
GstMapInfo map;
GST_LOG_OBJECT (flxdec, "Have frame type 0x%02x of size %d", type,
size);
if (!gst_byte_reader_get_sub_reader (&reader, &chunks,
size - FlxFrameChunkSize))
goto parse_error;
if (!gst_byte_reader_get_uint16_le (&chunks, &n_chunks))
goto parse_error;
GST_LOG_OBJECT (flxdec, "Have %d chunks", n_chunks);
if (n_chunks == 0)
break;
if (!gst_byte_reader_skip (&chunks, 8)) /* reserved */
goto parse_error;
gst_byte_writer_init_with_data (&writer, flxdec->frame_data,
flxdec->size, TRUE);
/* decode chunks */
if (!flx_decode_chunks (flxdec, n_chunks, &chunks, &writer)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Could not decode chunk"), NULL);
goto unmap_input_error;
}
gst_byte_writer_reset (&writer);
/* save copy of the current frame for possible delta. */
memcpy (flxdec->delta_data, flxdec->frame_data, flxdec->size);
out = gst_buffer_new_and_alloc (flxdec->size * 4);
if (!gst_buffer_map (out, &map, GST_MAP_WRITE)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Could not map output buffer"), NULL);
gst_buffer_unref (out);
goto unmap_input_error;
}
/* convert current frame. */
flx_colorspace_convert (flxdec->converter, flxdec->frame_data,
map.data);
gst_buffer_unmap (out, &map);
GST_BUFFER_TIMESTAMP (out) = flxdec->next_time;
flxdec->next_time += flxdec->frame_time;
res = gst_pad_push (flxdec->srcpad, out);
break;
}
default:
GST_DEBUG_OBJECT (flxdec, "Unknown frame type 0x%02x, skipping %d",
type, size);
if (!gst_byte_reader_skip (&reader, size - FlxFrameChunkSize))
goto parse_error;
break;
}
}
}
need_more_data:
gst_buffer_unmap (input, &map_info);
gst_buffer_unref (input);
return res;
/* ERRORS */
parse_error:
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Failed to parse stream"), (NULL));
unmap_input_error:
gst_buffer_unmap (input, &map_info);
error:
gst_buffer_unref (input);
return GST_FLOW_ERROR;
}
static gboolean
_read_flx_header (GstFlxDec * flxdec, GstByteReader * reader, FlxHeader * flxh)
{
memset (flxh, 0, sizeof (*flxh));
if (!gst_byte_reader_get_uint32_le (reader, &flxh->size))
goto error;
if (flxh->size < FlxHeaderSize) {
GST_ERROR_OBJECT (flxdec, "Invalid file size in the header");
return FALSE;
}
if (!gst_byte_reader_get_uint16_le (reader, &flxh->type))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->frames))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->width))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->height))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->depth))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->flags))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->speed))
goto error;
if (!gst_byte_reader_skip (reader, 2)) /* reserved */
goto error;
/* FLC */
if (!gst_byte_reader_get_uint32_le (reader, &flxh->created))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->creator))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->updated))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->updater))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->aspect_dx))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->aspect_dy))
goto error;
/* EGI */
if (!gst_byte_reader_get_uint16_le (reader, &flxh->ext_flags))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->keyframes))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->totalframes))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->req_memory))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->max_regions))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->transp_num))
goto error;
if (!gst_byte_reader_skip (reader, 24)) /* reserved */
goto error;
/* FLC */
if (!gst_byte_reader_get_uint32_le (reader, &flxh->oframe1))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->oframe2))
goto error;
if (!gst_byte_reader_skip (reader, 40)) /* reserved */
goto error;
return TRUE;
error:
GST_ERROR_OBJECT (flxdec, "Error reading file header");
return FALSE;
}
static gboolean
flx_decode_brun (GstFlxDec * flxdec, GstByteReader * reader,
GstByteWriter * writer)
{
gulong lines, row;
g_return_val_if_fail (flxdec != NULL, FALSE);
lines = flxdec->hdr.height;
while (lines--) {
/* packet count.
* should not be used anymore, since the flc format can
* contain more then 255 RLE packets. we use the frame
* width instead.
*/
if (!gst_byte_reader_skip (reader, 1))
goto error;
row = flxdec->hdr.width;
while (row) {
gint8 count;
if (!gst_byte_reader_get_int8 (reader, &count))
goto error;
if (count <= 0) {
const guint8 *data;
/* literal run */
count = ABS (count);
GST_LOG_OBJECT (flxdec, "have literal run of size %d", count);
if (count > row) {
GST_ERROR_OBJECT (flxdec, "Invalid BRUN line detected. "
"bytes to write exceeds the end of the row");
return FALSE;
}
row -= count;
if (!gst_byte_reader_get_data (reader, count, &data))
goto error;
if (!gst_byte_writer_put_data (writer, data, count))
goto error;
} else {
guint8 x;
GST_LOG_OBJECT (flxdec, "have replicate run of size %d", count);
if (count > row) {
GST_ERROR_OBJECT (flxdec, "Invalid BRUN packet detected."
"bytes to write exceeds the end of the row");
return FALSE;
}
/* replicate run */
row -= count;
if (!gst_byte_reader_get_uint8 (reader, &x))
goto error;
if (!gst_byte_writer_fill (writer, x, count))
goto error;
}
}
}
return TRUE;
error:
GST_ERROR_OBJECT (flxdec, "Failed to decode BRUN packet");
return FALSE;
}
static gboolean
gst_jif_mux_parse_image (GstJifMux * self, GstBuffer * buf)
{
GstByteReader reader = GST_BYTE_READER_INIT_FROM_BUFFER (buf);
GstJifMuxMarker *m;
guint8 marker = 0;
guint16 size = 0;
const guint8 *data = NULL;
GST_LOG_OBJECT (self, "Received buffer of size: %u", GST_BUFFER_SIZE (buf));
if (!gst_byte_reader_peek_uint8 (&reader, &marker))
goto error;
while (marker == 0xff) {
if (!gst_byte_reader_skip (&reader, 1))
goto error;
if (!gst_byte_reader_get_uint8 (&reader, &marker))
goto error;
switch (marker) {
case RST0:
case RST1:
case RST2:
case RST3:
case RST4:
case RST5:
case RST6:
case RST7:
case SOI:
GST_DEBUG_OBJECT (self, "marker = %x", marker);
m = gst_jif_mux_new_marker (marker, 0, NULL, FALSE);
self->priv->markers = g_list_prepend (self->priv->markers, m);
break;
case EOI:
GST_DEBUG_OBJECT (self, "marker = %x", marker);
m = gst_jif_mux_new_marker (marker, 0, NULL, FALSE);
self->priv->markers = g_list_prepend (self->priv->markers, m);
goto done;
break;
default:
if (!gst_byte_reader_get_uint16_be (&reader, &size))
goto error;
if (!gst_byte_reader_get_data (&reader, size - 2, &data))
goto error;
m = gst_jif_mux_new_marker (marker, size - 2, data, FALSE);
self->priv->markers = g_list_prepend (self->priv->markers, m);
GST_DEBUG_OBJECT (self, "marker = %2x, size = %u", marker, size);
break;
}
if (marker == SOS) {
gint eoi_pos = -1;
gint i;
/* search the last 5 bytes for the EOI marker */
g_assert (GST_BUFFER_SIZE (buf) >= 5);
for (i = 5; i >= 2; i--) {
if (GST_BUFFER_DATA (buf)[GST_BUFFER_SIZE (buf) - i] == 0xFF &&
GST_BUFFER_DATA (buf)[GST_BUFFER_SIZE (buf) - i + 1] == EOI) {
eoi_pos = GST_BUFFER_SIZE (buf) - i;
break;
}
}
if (eoi_pos == -1) {
GST_WARNING_OBJECT (self, "Couldn't find an EOI marker");
eoi_pos = GST_BUFFER_SIZE (buf);
}
/* remaining size except EOI is scan data */
self->priv->scan_size = eoi_pos - gst_byte_reader_get_pos (&reader);
if (!gst_byte_reader_get_data (&reader, self->priv->scan_size,
&self->priv->scan_data))
goto error;
GST_DEBUG_OBJECT (self, "scan data, size = %u", self->priv->scan_size);
}
if (!gst_byte_reader_peek_uint8 (&reader, &marker))
goto error;
}
GST_INFO_OBJECT (self, "done parsing at 0x%x / 0x%x",
gst_byte_reader_get_pos (&reader), GST_BUFFER_SIZE (buf));
done:
self->priv->markers = g_list_reverse (self->priv->markers);
return TRUE;
error:
GST_WARNING_OBJECT (self,
"Error parsing image header (need more that %u bytes available)",
gst_byte_reader_get_remaining (&reader));
return FALSE;
}
static GstFlowReturn
gst_ac3_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstAc3Parse *ac3parse = GST_AC3_PARSE (parse);
GstBuffer *buf = frame->buffer;
GstByteReader reader;
gint off;
gboolean lost_sync, draining, eac, more = FALSE;
guint frmsiz, blocks, sid;
guint rate, chans;
gboolean update_rate = FALSE;
gint framesize = 0;
gint have_blocks = 0;
GstMapInfo map;
gboolean ret = FALSE;
GstFlowReturn res = GST_FLOW_OK;
gst_buffer_map (buf, &map, GST_MAP_READ);
if (G_UNLIKELY (map.size < 8)) {
*skipsize = 1;
goto cleanup;
}
gst_byte_reader_init (&reader, map.data, map.size);
off = gst_byte_reader_masked_scan_uint32 (&reader, 0xffff0000, 0x0b770000,
0, map.size);
GST_LOG_OBJECT (parse, "possible sync at buffer offset %d", off);
/* didn't find anything that looks like a sync word, skip */
if (off < 0) {
*skipsize = map.size - 3;
goto cleanup;
}
/* possible frame header, but not at offset 0? skip bytes before sync */
if (off > 0) {
*skipsize = off;
goto cleanup;
}
/* make sure the values in the frame header look sane */
if (!gst_ac3_parse_frame_header (ac3parse, buf, 0, &frmsiz, &rate, &chans,
&blocks, &sid, &eac)) {
*skipsize = off + 2;
goto cleanup;
}
GST_LOG_OBJECT (parse, "size: %u, blocks: %u, rate: %u, chans: %u", frmsiz,
blocks, rate, chans);
framesize = frmsiz;
if (G_UNLIKELY (g_atomic_int_get (&ac3parse->align) ==
GST_AC3_PARSE_ALIGN_NONE))
gst_ac3_parse_set_alignment (ac3parse, eac);
GST_LOG_OBJECT (parse, "got frame");
lost_sync = GST_BASE_PARSE_LOST_SYNC (parse);
draining = GST_BASE_PARSE_DRAINING (parse);
if (g_atomic_int_get (&ac3parse->align) == GST_AC3_PARSE_ALIGN_IEC61937) {
/* We need 6 audio blocks from each substream, so we keep going forwards
* till we have it */
g_assert (blocks > 0);
GST_LOG_OBJECT (ac3parse, "Need %d frames before pushing", 6 / blocks);
if (sid != 0) {
/* We need the first substream to be the one with id 0 */
GST_LOG_OBJECT (ac3parse, "Skipping till we find sid 0");
*skipsize = off + 2;
goto cleanup;
}
framesize = 0;
/* Loop till we have 6 blocks per substream */
for (have_blocks = 0; !more && have_blocks < 6; have_blocks += blocks) {
/* Loop till we get one frame from each substream */
do {
framesize += frmsiz;
if (!gst_byte_reader_skip (&reader, frmsiz)
|| map.size < (framesize + 6)) {
more = TRUE;
break;
}
if (!gst_ac3_parse_frame_header (ac3parse, buf, framesize, &frmsiz,
NULL, NULL, NULL, &sid, &eac)) {
*skipsize = off + 2;
goto cleanup;
}
} while (sid);
}
/* We're now at the next frame, so no need to skip if resyncing */
frmsiz = 0;
}
if (lost_sync && !draining) {
guint16 word = 0;
GST_DEBUG_OBJECT (ac3parse, "resyncing; checking next frame syncword");
if (more || !gst_byte_reader_skip (&reader, frmsiz) ||
!gst_byte_reader_get_uint16_be (&reader, &word)) {
GST_DEBUG_OBJECT (ac3parse, "... but not sufficient data");
gst_base_parse_set_min_frame_size (parse, framesize + 8);
*skipsize = 0;
goto cleanup;
} else {
if (word != 0x0b77) {
GST_DEBUG_OBJECT (ac3parse, "0x%x not OK", word);
*skipsize = off + 2;
goto cleanup;
} else {
/* ok, got sync now, let's assume constant frame size */
gst_base_parse_set_min_frame_size (parse, framesize);
}
}
}
/* expect to have found a frame here */
g_assert (framesize);
ret = TRUE;
/* arrange for metadata setup */
if (G_UNLIKELY (sid)) {
/* dependent frame, no need to (ac)count for or consider further */
GST_LOG_OBJECT (parse, "sid: %d", sid);
frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NO_FRAME;
/* TODO maybe also mark as DELTA_UNIT,
* if that does not surprise baseparse elsewhere */
/* occupies same time space as previous base frame */
if (G_LIKELY (GST_BUFFER_TIMESTAMP (buf) >= GST_BUFFER_DURATION (buf)))
GST_BUFFER_TIMESTAMP (buf) -= GST_BUFFER_DURATION (buf);
/* only shortcut if we already arranged for caps */
if (G_LIKELY (ac3parse->sample_rate > 0))
goto cleanup;
}
if (G_UNLIKELY (ac3parse->sample_rate != rate || ac3parse->channels != chans
|| ac3parse->eac != eac)) {
GstCaps *caps = gst_caps_new_simple (eac ? "audio/x-eac3" : "audio/x-ac3",
"framed", G_TYPE_BOOLEAN, TRUE, "rate", G_TYPE_INT, rate,
"channels", G_TYPE_INT, chans, NULL);
gst_caps_set_simple (caps, "alignment", G_TYPE_STRING,
g_atomic_int_get (&ac3parse->align) == GST_AC3_PARSE_ALIGN_IEC61937 ?
"iec61937" : "frame", NULL);
gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (parse), caps);
gst_caps_unref (caps);
ac3parse->sample_rate = rate;
ac3parse->channels = chans;
ac3parse->eac = eac;
update_rate = TRUE;
}
if (G_UNLIKELY (ac3parse->blocks != blocks)) {
ac3parse->blocks = blocks;
update_rate = TRUE;
}
if (G_UNLIKELY (update_rate))
gst_base_parse_set_frame_rate (parse, rate, 256 * blocks, 2, 2);
cleanup:
gst_buffer_unmap (buf, &map);
if (ret && framesize <= map.size) {
res = gst_base_parse_finish_frame (parse, frame, framesize);
}
return res;
}
static void
gst_exif_tag_rewrite_offsets (GstExifWriter * writer, guint32 base_offset)
{
guint32 offset;
GST_LOG ("Rewriting tag entries offsets");
offset = gst_byte_writer_get_size (&writer->tagwriter);
while (gst_byte_writer_get_pos (&writer->tagwriter) <
gst_byte_writer_get_size (&writer->tagwriter)) {
guint16 type = 0;
guint32 cur_offset = 0;
GstByteReader *reader;
gint byte_size = 0;
guint32 count = 0;
guint16 tag_id = 0;
reader = (GstByteReader *) & writer->tagwriter;
/* read the type */
if (writer->byte_order == G_LITTLE_ENDIAN) {
if (!gst_byte_reader_get_uint16_le (reader, &tag_id))
break;
if (!gst_byte_reader_get_uint16_le (reader, &type))
break;
if (!gst_byte_reader_get_uint32_le (reader, &count))
break;
} else {
if (!gst_byte_reader_get_uint16_be (reader, &tag_id))
break;
if (!gst_byte_reader_get_uint16_be (reader, &type))
break;
if (!gst_byte_reader_get_uint32_be (reader, &count))
break;
}
switch (type) {
case EXIF_TYPE_BYTE:
case EXIF_TYPE_ASCII:
case EXIF_TYPE_UNDEFINED:
byte_size = count;
break;
case EXIF_TYPE_SHORT:
byte_size = count * 2; /* 2 bytes */
break;
case EXIF_TYPE_LONG:
case EXIF_TYPE_SLONG:
byte_size = count * 4; /* 4 bytes */
break;
case EXIF_TYPE_RATIONAL:
case EXIF_TYPE_SRATIONAL:
byte_size = count * 8; /* 8 bytes */
break;
default:
g_assert_not_reached ();
break;
}
/* adjust the offset if needed */
if (byte_size > 4 || tag_id == EXIF_GPS_IFD_TAG) {
if (writer->byte_order == G_LITTLE_ENDIAN) {
if (gst_byte_reader_peek_uint32_le (reader, &cur_offset)) {
gst_byte_writer_put_uint32_le (&writer->tagwriter,
cur_offset + offset + base_offset);
}
} else {
if (gst_byte_reader_peek_uint32_be (reader, &cur_offset)) {
gst_byte_writer_put_uint32_be (&writer->tagwriter,
cur_offset + offset + base_offset);
}
}
GST_DEBUG ("Rewriting tag offset from %u to (%u + %u + %u) %u",
cur_offset, cur_offset, offset, base_offset,
cur_offset + offset + base_offset);
} else {
gst_byte_reader_skip (reader, 4);
GST_DEBUG ("No need to rewrite tag offset");
}
}
}
static inline gboolean
gst_jpeg_parse_sof (GstJpegParse * parse, GstByteReader * reader)
{
guint8 numcomps = 0; /* Number of components in image
(1 for gray, 3 for YUV, etc.) */
guint8 precision; /* precision (in bits) for the samples */
guint8 compId[3]; /* unique value identifying each component */
guint8 qtId[3]; /* quantization table ID to use for this comp */
guint8 blockWidth[3]; /* Array[numComponents] giving the number of
blocks (horiz) in this component */
guint8 blockHeight[3]; /* Same for the vertical part of this component */
guint8 i, value = 0;
gint temp;
/* flush length field */
if (!gst_byte_reader_skip (reader, 2))
return FALSE;
/* Get sample precision */
if (!gst_byte_reader_get_uint8 (reader, &precision))
return FALSE;
/* Get w and h */
if (!gst_byte_reader_get_uint16_be (reader, &parse->priv->height))
return FALSE;
if (!gst_byte_reader_get_uint16_be (reader, &parse->priv->width))
return FALSE;
/* Get number of components */
if (!gst_byte_reader_get_uint8 (reader, &numcomps))
return FALSE;
if (numcomps > 3)
return FALSE;
/* Get decimation and quantization table id for each component */
for (i = 0; i < numcomps; i++) {
/* Get component ID number */
if (!gst_byte_reader_get_uint8 (reader, &value))
return FALSE;
compId[i] = value;
/* Get decimation */
if (!gst_byte_reader_get_uint8 (reader, &value))
return FALSE;
blockWidth[i] = (value & 0xf0) >> 4;
blockHeight[i] = (value & 0x0f);
/* Get quantization table id */
if (!gst_byte_reader_get_uint8 (reader, &value))
return FALSE;
qtId[i] = value;
}
if (numcomps == 1) {
/* gray image - no fourcc */
parse->priv->fourcc = 0;
} else if (numcomps == 3) {
temp = (blockWidth[0] * blockHeight[0]) / (blockWidth[1] * blockHeight[1]);
if (temp == 4 && blockHeight[0] == 2)
parse->priv->fourcc = GST_MAKE_FOURCC ('I', '4', '2', '0');
else if (temp == 4 && blockHeight[0] == 4)
parse->priv->fourcc = GST_MAKE_FOURCC ('Y', '4', '1', 'B');
else if (temp == 2)
parse->priv->fourcc = GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y');
else if (temp == 1)
parse->priv->fourcc = GST_MAKE_FOURCC ('Y', 'V', '1', '2');
else
parse->priv->fourcc = 0;
} else {
return FALSE;
}
GST_DEBUG_OBJECT (parse, "Header parsed");
return TRUE;
}
static GstFlowReturn
gst_png_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstPngParse *pngparse = GST_PNG_PARSE (parse);
GstMapInfo map;
GstByteReader reader;
GstFlowReturn ret = GST_FLOW_OK;
guint64 signature;
guint width = 0, height = 0;
gst_buffer_map (frame->buffer, &map, GST_MAP_READ);
gst_byte_reader_init (&reader, map.data, map.size);
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto beach;
if (signature != PNG_SIGNATURE) {
for (;;) {
guint offset;
offset = gst_byte_reader_masked_scan_uint32 (&reader, 0xffffffff,
0x89504E47, 0, gst_byte_reader_get_remaining (&reader));
if (offset == -1) {
*skipsize = gst_byte_reader_get_remaining (&reader) - 4;
goto beach;
}
gst_byte_reader_skip (&reader, offset);
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto beach;
if (signature == PNG_SIGNATURE) {
/* We're skipping, go out, we'll be back */
*skipsize = gst_byte_reader_get_pos (&reader);
goto beach;
}
gst_byte_reader_skip (&reader, 4);
}
}
gst_byte_reader_skip (&reader, 8);
for (;;) {
guint32 length;
guint32 code;
if (!gst_byte_reader_get_uint32_be (&reader, &length))
goto beach;
if (!gst_byte_reader_get_uint32_le (&reader, &code))
goto beach;
GST_TRACE_OBJECT (parse, "%" GST_FOURCC_FORMAT " chunk, %u bytes",
GST_FOURCC_ARGS (code), length);
if (code == GST_MAKE_FOURCC ('I', 'H', 'D', 'R')) {
if (!gst_byte_reader_get_uint32_be (&reader, &width))
goto beach;
if (!gst_byte_reader_get_uint32_be (&reader, &height))
goto beach;
length -= 8;
} else if (code == GST_MAKE_FOURCC ('I', 'D', 'A', 'T')) {
gst_base_parse_set_min_frame_size (parse,
gst_byte_reader_get_pos (&reader) + 4 + length + 12);
}
if (!gst_byte_reader_skip (&reader, length + 4))
goto beach;
if (code == GST_MAKE_FOURCC ('I', 'E', 'N', 'D')) {
/* the start code and at least 2 empty frames (IHDR and IEND) */
gst_base_parse_set_min_frame_size (parse, 8 + 12 + 12);
if (pngparse->width != width || pngparse->height != height) {
GstCaps *caps, *sink_caps;
pngparse->height = height;
pngparse->width = width;
caps = gst_caps_new_simple ("image/png",
"width", G_TYPE_INT, width, "height", G_TYPE_INT, height, NULL);
sink_caps =
gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (pngparse));
if (sink_caps) {
GstStructure *st;
gint fr_num, fr_denom;
st = gst_caps_get_structure (sink_caps, 0);
if (st
&& gst_structure_get_fraction (st, "framerate", &fr_num,
&fr_denom)) {
gst_caps_set_simple (caps,
"framerate", GST_TYPE_FRACTION, fr_num, fr_denom, NULL);
} else {
GST_WARNING_OBJECT (pngparse, "No framerate set");
}
gst_caps_unref (sink_caps);
}
if (!gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (parse), caps))
ret = GST_FLOW_NOT_NEGOTIATED;
gst_caps_unref (caps);
if (ret != GST_FLOW_OK)
goto beach;
}
gst_buffer_unmap (frame->buffer, &map);
return gst_base_parse_finish_frame (parse, frame,
gst_byte_reader_get_pos (&reader));
}
}
beach:
gst_buffer_unmap (frame->buffer, &map);
return ret;
}
gboolean
gst_mss_fragment_parser_add_buffer (GstMssFragmentParser * parser,
GstBuffer * buffer)
{
GstByteReader reader;
GstMapInfo info;
guint64 size;
guint32 fourcc;
guint header_size;
gboolean error = FALSE;
if (!gst_buffer_map (buffer, &info, GST_MAP_READ)) {
return FALSE;
}
gst_byte_reader_init (&reader, info.data, info.size);
GST_TRACE ("Total buffer size: %u", gst_byte_reader_get_size (&reader));
do {
parser->current_fourcc = 0;
if (!gst_isoff_parse_box_header (&reader, &fourcc, NULL, &header_size,
&size)) {
break;
}
parser->current_fourcc = fourcc;
GST_LOG ("box %" GST_FOURCC_FORMAT " size %" G_GUINT64_FORMAT,
GST_FOURCC_ARGS (fourcc), size);
parser->current_fourcc = fourcc;
if (parser->current_fourcc == GST_ISOFF_FOURCC_MOOF) {
GstByteReader sub_reader;
g_assert (parser->moof == NULL);
gst_byte_reader_get_sub_reader (&reader, &sub_reader, size - header_size);
parser->moof = gst_isoff_moof_box_parse (&sub_reader);
if (parser->moof == NULL) {
GST_ERROR ("Failed to parse moof");
error = TRUE;
}
} else if (parser->current_fourcc == GST_ISOFF_FOURCC_MDAT) {
goto beach;
} else {
gst_byte_reader_skip (&reader, size - header_size);
}
} while (gst_byte_reader_get_remaining (&reader) > 0);
beach:
/* Do sanity check */
if (parser->current_fourcc != GST_ISOFF_FOURCC_MDAT || !parser->moof ||
parser->moof->traf->len == 0)
error = TRUE;
if (!error) {
GstTrafBox *traf = &g_array_index (parser->moof->traf, GstTrafBox, 0);
if (!traf->tfxd) {
GST_ERROR ("no tfxd box");
error = TRUE;
} else if (!traf->tfrf) {
GST_ERROR ("no tfrf box");
error = TRUE;
}
}
if (!error)
parser->status = GST_MSS_FRAGMENT_HEADER_PARSER_FINISHED;
GST_LOG ("Fragment parsing successful: %s", error ? "no" : "yes");
gst_buffer_unmap (buffer, &info);
return !error;
}
