gboolean
mpeg4_util_parse_VOS (GstBuffer * buf, Mpeg4VisualObjectSequence * vos)
{
GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buf);
guint8 visual_object_sequence_start_code;
/* start code prefix */
SKIP (&reader, 24);
READ_UINT8 (&reader, visual_object_sequence_start_code, 8);
if (visual_object_sequence_start_code != MPEG4_PACKET_VOS)
goto wrong_start_code;
READ_UINT8 (&reader, vos->profile_and_level_indication, 8);
return TRUE;
wrong_start_code:
GST_WARNING ("got buffer with wrong start code");
return FALSE;
error:
GST_WARNING ("error parsing \"Visual Object\"");
return FALSE;
}
static gboolean
parse_quant (GstBitReader * br, guint8 quant_mat[64],
const guint8 default_quant_mat[64], guint8 * load_quant_mat)
{
READ_UINT8 (br, *load_quant_mat, 1);
if (*load_quant_mat) {
guint i;
guint8 val;
val = 1;
for (i = 0; i < 64; i++) {
if (val != 0)
READ_UINT8 (br, val, 8);
if (val == 0) {
if (i == 0)
goto invalid_quant_mat;
quant_mat[mpeg4_zigzag_8x8[i]] = quant_mat[mpeg4_zigzag_8x8[i - 1]];
} else
quant_mat[mpeg4_zigzag_8x8[i]] = val;
}
} else
memcpy (quant_mat, default_quant_mat, 64);
return TRUE;
failed:
GST_WARNING ("failed parsing quant matrix");
return FALSE;
invalid_quant_mat:
GST_WARNING ("the first value should be non zero");
goto failed;
}
gboolean
mpeg_util_parse_picture_hdr (MPEGPictureHdr * hdr, GstBuffer * buffer)
{
GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buffer);
/* skip sync word */
if (!gst_bit_reader_skip (&reader, 8 * 4))
return FALSE;
/* temperal sequence number */
if (!gst_bit_reader_get_bits_uint16 (&reader, &hdr->tsn, 10))
return FALSE;
/* frame type */
if (!gst_bit_reader_get_bits_uint8 (&reader, &hdr->pic_type, 3))
return FALSE;
if (hdr->pic_type == 0 || hdr->pic_type > 4)
return FALSE; /* Corrupted picture packet */
/* VBV delay */
if (!gst_bit_reader_get_bits_uint16 (&reader, &hdr->vbv_delay, 16))
return FALSE;
if (hdr->pic_type == P_FRAME || hdr->pic_type == B_FRAME) {
READ_UINT8 (&reader, hdr->full_pel_forward_vector, 1);
READ_UINT8 (&reader, hdr->f_code[0][0], 3);
hdr->f_code[0][1] = hdr->f_code[0][0];
} else {
hdr->full_pel_forward_vector = 0;
hdr->f_code[0][0] = hdr->f_code[0][1] = 0;
}
if (hdr->pic_type == B_FRAME) {
READ_UINT8 (&reader, hdr->full_pel_backward_vector, 1);
READ_UINT8 (&reader, hdr->f_code[1][0], 3);
hdr->f_code[1][1] = hdr->f_code[1][0];
} else {
hdr->full_pel_backward_vector = 0;
hdr->f_code[1][0] = hdr->f_code[1][1] = 0;
}
return TRUE;
error:
GST_WARNING ("error parsing \"Picture Header\"");
return FALSE;
}
/**
* gst_mpeg4_parse_visual_object:
* @vo: The #GstMpeg4VisualObject structure to fill
* @signal_type: The #GstMpeg4VideoSignalType to fill or %NULL
* @data: The data to parse, should contain the vo_start_code
* but not the start code prefix
* @size: The size of the @data to parse
*
* Parses @data containing the visual object packet, and fills
* the @vo structure.
*
* Returns: a #GstMpeg4ParseResult
*/
GstMpeg4ParseResult
gst_mpeg4_parse_visual_object (GstMpeg4VisualObject * vo,
GstMpeg4VideoSignalType * signal_type, const guint8 * data, gsize size)
{
guint8 vo_start_code, type;
GstBitReader br = GST_BIT_READER_INIT (data, size);
g_return_val_if_fail (vo != NULL, GST_MPEG4_PARSER_ERROR);
GST_DEBUG ("Parsing visual object");
READ_UINT8 (&br, vo_start_code, 8);
if (vo_start_code != GST_MPEG4_VISUAL_OBJ)
goto wrong_start_code;
/* set default values */
vo->verid = 0x1;
vo->priority = 1;
READ_UINT8 (&br, vo->is_identifier, 1);
if (vo->is_identifier) {
READ_UINT8 (&br, vo->verid, 4);
READ_UINT8 (&br, vo->priority, 3);
}
READ_UINT8 (&br, type, 4);
vo->type = type;
if ((type == GST_MPEG4_VIDEO_ID ||
type == GST_MPEG4_STILL_TEXTURE_ID) && signal_type) {
if (!parse_signal_type (&br, signal_type))
goto failed;
} else if (signal_type) {
signal_type->type = 0;
}
return GST_MPEG4_PARSER_OK;
wrong_start_code:
GST_WARNING ("got buffer with wrong start code");
return GST_MPEG4_PARSER_ERROR;
failed:
GST_WARNING ("failed parsing \"Visual Object\"");
return GST_MPEG4_PARSER_ERROR;
}
/**
* gst_mpeg4_parse_group_of_vop:
* @gov: The #GstMpeg4GroupOfVOP structure to fill
* @data: The data to parse
* @size: The size of the @data to parse
*
* Parses @data containing the group of video object plane packet, and fills
* the @gov structure.
*
* Returns: a #GstMpeg4ParseResult
*/
GstMpeg4ParseResult
gst_mpeg4_parse_group_of_vop (GstMpeg4GroupOfVOP *
gov, const guint8 * data, gsize size)
{
guint8 gov_start_code;
GstBitReader br = GST_BIT_READER_INIT (data, size);
g_return_val_if_fail (gov != NULL, GST_MPEG4_PARSER_ERROR);
READ_UINT8 (&br, gov_start_code, 8);
if (gov_start_code != GST_MPEG4_GROUP_OF_VOP)
goto wrong_start_code;
CHECK_REMAINING (&br, 65);
gov->hours = gst_bit_reader_get_bits_uint8_unchecked (&br, 5);
gov->minutes = gst_bit_reader_get_bits_uint8_unchecked (&br, 6);
/* marker bit */
MARKER_UNCHECKED (&br);
gov->seconds = gst_bit_reader_get_bits_uint8_unchecked (&br, 6);
gov->closed = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
gov->broken_link = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
return GST_MPEG4_PARSER_OK;
failed:
GST_WARNING ("failed parsing \"Group of Video Object Plane\"");
return GST_MPEG4_PARSER_ERROR;
wrong_start_code:
GST_WARNING ("got buffer with wrong start code");
goto failed;
}
gboolean
mpeg_util_parse_sequence_hdr (MPEGSeqHdr * hdr, GstBuffer * buffer)
{
GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buffer);
guint8 dar_idx, par_idx;
guint8 load_intra_flag, load_non_intra_flag;
/* skip sync word */
if (!gst_bit_reader_skip (&reader, 8 * 4))
return FALSE;
/* resolution */
READ_UINT16 (&reader, hdr->width, 12);
READ_UINT16 (&reader, hdr->height, 12);
/* aspect ratio */
READ_UINT8 (&reader, dar_idx, 4);
set_par_from_dar (hdr, dar_idx);
/* framerate */
READ_UINT8 (&reader, par_idx, 4);
set_fps_from_code (hdr, par_idx);
/* bitrate */
READ_UINT32 (&reader, hdr->bitrate, 18);
if (!gst_bit_reader_skip (&reader, 1))
return FALSE;
/* VBV buffer size */
READ_UINT16 (&reader, hdr->vbv_buffer, 10);
/* constrained parameters flag */
READ_UINT8 (&reader, hdr->constrained_parameters_flag, 1);
/* intra quantizer matrix */
READ_UINT8 (&reader, load_intra_flag, 1);
if (load_intra_flag) {
gint i;
for (i = 0; i < 64; i++)
READ_UINT8 (&reader, hdr->intra_quantizer_matrix[mpeg_zigzag_8x8[i]], 8);
} else
memcpy (hdr->intra_quantizer_matrix, default_intra_quantizer_matrix, 64);
/* non intra quantizer matrix */
READ_UINT8 (&reader, load_non_intra_flag, 1);
if (load_non_intra_flag) {
gint i;
for (i = 0; i < 64; i++)
READ_UINT8 (&reader, hdr->non_intra_quantizer_matrix[mpeg_zigzag_8x8[i]],
8);
} else
memset (hdr->non_intra_quantizer_matrix, 16, 64);
return TRUE;
error:
GST_WARNING ("error parsing \"Sequence Header\"");
return FALSE;
}
gboolean
mpeg_util_parse_gop (MPEGGop * gop, GstBuffer * buffer)
{
GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buffer);
/* skip sync word */
if (!gst_bit_reader_skip (&reader, 8 * 4))
return FALSE;
READ_UINT8 (&reader, gop->drop_frame_flag, 1);
READ_UINT8 (&reader, gop->hour, 5);
READ_UINT8 (&reader, gop->minute, 6);
/* skip unused bit */
if (!gst_bit_reader_skip (&reader, 1))
return FALSE;
READ_UINT8 (&reader, gop->second, 6);
READ_UINT8 (&reader, gop->frame, 6);
READ_UINT8 (&reader, gop->closed_gop, 1);
READ_UINT8 (&reader, gop->broken_gop, 1);
return TRUE;
error:
GST_WARNING ("error parsing \"GOP\"");
return FALSE;
}
static gboolean
parse_signal_type (GstBitReader * br, GstMpeg4VideoSignalType * signal_type)
{
READ_UINT8 (br, signal_type->type, 1);
if (signal_type->type) {
READ_UINT8 (br, signal_type->format, 3);
READ_UINT8 (br, signal_type->range, 1);
READ_UINT8 (br, signal_type->color_description, 1);
if (signal_type->color_description) {
READ_UINT8 (br, signal_type->color_primaries, 8);
READ_UINT8 (br, signal_type->transfer_characteristics, 8);
READ_UINT8 (br, signal_type->matrix_coefficients, 8);
}
}
return TRUE;
failed:
GST_WARNING ("failed parsing \"Video Signal Type\"");
return FALSE;
}
gboolean
mpeg_util_parse_quant_matrix (MPEGQuantMatrix * qm, GstBuffer * buffer)
{
GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buffer);
guint8 load_intra_flag, load_non_intra_flag;
/* skip sync word */
if (!gst_bit_reader_skip (&reader, 8 * 4))
return FALSE;
/* skip extension code */
if (!gst_bit_reader_skip (&reader, 4))
return FALSE;
/* intra quantizer matrix */
READ_UINT8 (&reader, load_intra_flag, 1);
if (load_intra_flag) {
gint i;
for (i = 0; i < 64; i++) {
READ_UINT8 (&reader, qm->intra_quantizer_matrix[mpeg_zigzag_8x8[i]], 8);
}
} else
memcpy (qm->intra_quantizer_matrix, default_intra_quantizer_matrix, 64);
/* non intra quantizer matrix */
READ_UINT8 (&reader, load_non_intra_flag, 1);
if (load_non_intra_flag) {
gint i;
for (i = 0; i < 64; i++) {
READ_UINT8 (&reader, qm->non_intra_quantizer_matrix[mpeg_zigzag_8x8[i]],
8);
}
} else
memset (qm->non_intra_quantizer_matrix, 16, 64);
return TRUE;
error:
GST_WARNING ("error parsing \"Quant Matrix Extension\"");
return FALSE;
}
gboolean
mpeg4_util_parse_GOV (GstBuffer * buf, Mpeg4GroupofVideoObjectPlane * gov)
{
GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buf);
guint8 gov_start_code;
/* start code prefix */
SKIP (&reader, 24);
READ_UINT8 (&reader, gov_start_code, 8);
if (gov_start_code != MPEG4_PACKET_GOV)
goto wrong_start_code;
READ_UINT8 (&reader, gov->hours, 5);
READ_UINT8 (&reader, gov->minutes, 6);
/* marker bit */
SKIP (&reader, 1);
READ_UINT8 (&reader, gov->seconds, 6);
READ_UINT8 (&reader, gov->closed, 1);
READ_UINT8 (&reader, gov->broken_link, 1);
return TRUE;
error:
GST_WARNING ("error parsing \"Group of Video Object Plane\"");
return FALSE;
wrong_start_code:
GST_WARNING ("got buffer with wrong start code");
goto error;
}
static gboolean
mpeg4_util_parse_quant (GstBitReader * reader, guint8 quant_mat[64],
const guint8 default_quant_mat[64])
{
guint8 load_quant_mat;
READ_UINT8 (reader, load_quant_mat, 1);
if (load_quant_mat) {
guint i;
guint8 val;
val = 1;
for (i = 0; i < 64; i++) {
if (val != 0)
READ_UINT8 (reader, val, 8);
if (val == 0) {
if (i == 0)
goto invalid_quant_mat;
quant_mat[mpeg4_zigzag_8x8[i]] = quant_mat[mpeg4_zigzag_8x8[i - 1]];
} else
quant_mat[mpeg4_zigzag_8x8[i]] = val;
}
} else
memcpy (quant_mat, default_quant_mat, 64);
return TRUE;
error:
GST_WARNING ("error parsing quant matrix");
return FALSE;
invalid_quant_mat:
GST_WARNING ("the first value should be non zero");
goto error;
}
gboolean
mpeg4_util_parse_VO (GstBuffer * buf, Mpeg4VisualObject * vo)
{
GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buf);
guint8 visual_object_start_code;
guint8 is_visual_object_identifier;
/* set defualt values */
vo->verid = 0x1;
vo->priority = 1;
/* start code prefix */
SKIP (&reader, 24);
READ_UINT8 (&reader, visual_object_start_code, 8);
if (visual_object_start_code != MPEG4_PACKET_VO)
goto wrong_start_code;
READ_UINT8 (&reader, is_visual_object_identifier, 1);
if (is_visual_object_identifier) {
READ_UINT8 (&reader, vo->verid, 4);
READ_UINT8 (&reader, vo->priority, 3);
}
READ_UINT8 (&reader, vo->type, 4);
return TRUE;
wrong_start_code:
GST_WARNING ("got buffer with wrong start code");
return FALSE;
error:
GST_WARNING ("error parsing \"Visual Object\"");
return FALSE;
}
gboolean
mpeg_util_parse_sequence_extension (MPEGSeqExtHdr * hdr, GstBuffer * buffer)
{
GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buffer);;
/* skip sync word */
if (!gst_bit_reader_skip (&reader, 8 * 4))
return FALSE;
/* skip extension code */
if (!gst_bit_reader_skip (&reader, 4))
return FALSE;
/* skip profile and level escape bit */
if (!gst_bit_reader_skip (&reader, 1))
return FALSE;
READ_UINT8 (&reader, hdr->profile, 3);
READ_UINT8 (&reader, hdr->level, 4);
/* progressive */
READ_UINT8 (&reader, hdr->progressive, 1);
/* chroma format */
READ_UINT8 (&reader, hdr->chroma_format, 2);
/* resolution extension */
READ_UINT8 (&reader, hdr->horiz_size_ext, 2);
READ_UINT8 (&reader, hdr->vert_size_ext, 2);
READ_UINT16 (&reader, hdr->bitrate_ext, 12);
/* skip to framerate extension */
if (!gst_bit_reader_skip (&reader, 9))
return FALSE;
/* framerate extension */
READ_UINT8 (&reader, hdr->fps_n_ext, 2);
READ_UINT8 (&reader, hdr->fps_d_ext, 2);
return TRUE;
error:
GST_WARNING ("error parsing \"Sequence Extension\"");
return FALSE;
}
static gboolean
gst_vdp_h264_dec_set_sink_caps (GstBaseVideoDecoder * base_video_decoder,
GstCaps * caps)
{
GstVdpH264Dec *h264_dec;
GstStructure *structure;
const GValue *value;
h264_dec = GST_VDP_H264_DEC (base_video_decoder);
structure = gst_caps_get_structure (caps, 0);
/* packetized video has a codec_data */
if ((value = gst_structure_get_value (structure, "codec_data"))) {
GstBuffer *buf;
GstBitReader reader;
guint8 version;
guint8 n_sps, n_pps;
gint i;
GST_DEBUG_OBJECT (h264_dec, "have packetized h264");
h264_dec->packetized = TRUE;
buf = gst_value_get_buffer (value);
GST_MEMDUMP ("avcC:", GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
/* parse the avcC data */
if (GST_BUFFER_SIZE (buf) < 7) {
GST_ERROR_OBJECT (h264_dec, "avcC size %u < 7", GST_BUFFER_SIZE (buf));
return FALSE;
}
gst_bit_reader_init_from_buffer (&reader, buf);
READ_UINT8 (&reader, version, 8);
if (version != 1)
return FALSE;
SKIP (&reader, 30);
READ_UINT8 (&reader, h264_dec->nal_length_size, 2);
h264_dec->nal_length_size += 1;
GST_DEBUG_OBJECT (h264_dec, "nal length %u", h264_dec->nal_length_size);
SKIP (&reader, 3);
READ_UINT8 (&reader, n_sps, 5);
for (i = 0; i < n_sps; i++) {
guint16 sps_length;
guint8 *data;
READ_UINT16 (&reader, sps_length, 16);
sps_length -= 1;
SKIP (&reader, 8);
data = GST_BUFFER_DATA (buf) + gst_bit_reader_get_pos (&reader) / 8;
if (!gst_h264_parser_parse_sequence (h264_dec->parser, data, sps_length))
return FALSE;
SKIP (&reader, sps_length * 8);
}
READ_UINT8 (&reader, n_pps, 8);
for (i = 0; i < n_pps; i++) {
guint16 pps_length;
guint8 *data;
READ_UINT16 (&reader, pps_length, 16);
pps_length -= 1;
SKIP (&reader, 8);
data = GST_BUFFER_DATA (buf) + gst_bit_reader_get_pos (&reader) / 8;
if (!gst_h264_parser_parse_picture (h264_dec->parser, data, pps_length))
return FALSE;
SKIP (&reader, pps_length * 8);
}
}
return TRUE;
}
gboolean
mpeg4_util_parse_VOP (GstBuffer * buf, Mpeg4VideoObjectLayer * vol,
Mpeg4VideoObjectPlane * vop)
{
GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buf);
guint8 vop_start_code;
guint8 modulo_time_base;
/* set default values */
vop->modulo_time_base = 0;
vop->rounding_type = 0;
vop->top_field_first = 1;
vop->alternate_vertical_scan_flag = 0;
vop->fcode_forward = 1;
vop->fcode_backward = 1;
/* start code prefix */
SKIP (&reader, 24);
READ_UINT8 (&reader, vop_start_code, 8);
if (vop_start_code != MPEG4_PACKET_VOP)
goto wrong_start_code;
READ_UINT8 (&reader, vop->coding_type, 2);
READ_UINT8 (&reader, modulo_time_base, 1);
while (modulo_time_base) {
vop->modulo_time_base++;
READ_UINT8 (&reader, modulo_time_base, 1);
}
/* marker bit */
SKIP (&reader, 1);
READ_UINT16 (&reader, vop->time_increment, vol->vop_time_increment_bits);
/* marker bit */
SKIP (&reader, 1);
READ_UINT8 (&reader, vop->coded, 1);
if (!vop->coded)
return TRUE;
if (vop->coding_type == P_VOP)
READ_UINT8 (&reader, vop->rounding_type, 1);
READ_UINT8 (&reader, vop->intra_dc_vlc_thr, 3);
if (vol->interlaced) {
READ_UINT8 (&reader, vop->top_field_first, 1);
READ_UINT8 (&reader, vop->alternate_vertical_scan_flag, 1);
}
READ_UINT16 (&reader, vop->quant, vol->quant_precision);
if (vop->coding_type != I_VOP) {
READ_UINT8 (&reader, vop->fcode_forward, 3);
CHECK_ALLOWED (vop->fcode_forward, 1, 7);
}
if (vop->coding_type == B_VOP) {
READ_UINT8 (&reader, vop->fcode_backward, 3);
CHECK_ALLOWED (vop->fcode_backward, 1, 7);
}
return TRUE;
error:
GST_WARNING ("error parsing \"Video Object Plane\"");
return FALSE;
wrong_start_code:
GST_WARNING ("got buffer with wrong start code");
goto error;
}
static GstFlowReturn
gst_vdp_mpeg4_dec_parse_data (GstBaseVideoDecoder * base_video_decoder,
GstBuffer * buf, gboolean at_eos, GstVideoFrame * frame)
{
GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buf);
guint8 start_code;
GstMpeg4Frame *mpeg4_frame;
GstFlowReturn ret = GST_FLOW_OK;
/* start code prefix */
SKIP (&reader, 24);
/* start_code */
READ_UINT8 (&reader, start_code, 8);
mpeg4_frame = GST_MPEG4_FRAME_CAST (frame);
/* collect packages */
if (start_code == MPEG4_PACKET_VOS) {
if (mpeg4_frame->vop_buf)
ret = gst_base_video_decoder_have_frame (base_video_decoder, FALSE,
(GstVideoFrame **) & mpeg4_frame);
gst_buffer_replace (&mpeg4_frame->vos_buf, buf);
}
else if (start_code == MPEG4_PACKET_EVOS) {
if (mpeg4_frame->vop_buf)
ret = gst_base_video_decoder_have_frame (base_video_decoder, FALSE,
(GstVideoFrame **) & mpeg4_frame);
}
else if (start_code == MPEG4_PACKET_VO)
gst_buffer_replace (&mpeg4_frame->vo_buf, buf);
else if (start_code >= MPEG4_PACKET_VOL_MIN &&
start_code <= MPEG4_PACKET_VOL_MAX)
gst_buffer_replace (&mpeg4_frame->vol_buf, buf);
else if (start_code == MPEG4_PACKET_GOV) {
if (mpeg4_frame->vop_buf)
ret = gst_base_video_decoder_have_frame (base_video_decoder, FALSE,
(GstVideoFrame **) & mpeg4_frame);
gst_buffer_replace (&mpeg4_frame->gov_buf, buf);
}
else if (start_code == MPEG4_PACKET_VOP) {
if (mpeg4_frame->vop_buf)
ret = gst_base_video_decoder_have_frame (base_video_decoder, FALSE,
(GstVideoFrame **) & mpeg4_frame);
mpeg4_frame->vop_buf = buf;
}
else
gst_buffer_unref (buf);
if (at_eos && mpeg4_frame->vop_buf)
ret = gst_base_video_decoder_have_frame (base_video_decoder, TRUE,
(GstVideoFrame **) & mpeg4_frame);
return ret;
error:
gst_buffer_unref (buf);
GST_WARNING ("error parsing packet");
return GST_FLOW_OK;
}
/**
* gst_mpeg4_parse_video_object_plane:
* @vop: The #GstMpeg4VideoObjectPlane currently being parsed
* @sprite_trajectory: A #GstMpeg4SpriteTrajectory to fill or %NULL
* @vol: The #GstMpeg4VideoObjectLayer structure to fill
* @data: The data to parse
* @size: The size of the @data to parse
*
* Parses @data containing the video object plane packet, and fills the @vol
* structure.
*
* Returns: a #GstMpeg4ParseResult
*/
GstMpeg4ParseResult
gst_mpeg4_parse_video_object_plane (GstMpeg4VideoObjectPlane * vop,
GstMpeg4SpriteTrajectory * sprite_trajectory,
GstMpeg4VideoObjectLayer * vol, const guint8 * data, gsize size)
{
guint8 vop_start_code, coding_type, modulo_time_base;
GstBitReader br = GST_BIT_READER_INIT (data, size);
g_return_val_if_fail (vop != NULL, GST_MPEG4_PARSER_ERROR);
if (vol->shape == GST_MPEG4_BINARY_ONLY) {
/* TODO: implement binary only shapes */
GST_WARNING ("Binary only shapes not supported");
goto failed;
}
READ_UINT8 (&br, vop_start_code, 8);
if (vop_start_code != GST_MPEG4_VIDEO_OBJ_PLANE)
goto wrong_start_code;
/* set default values */
vop->modulo_time_base = 0;
vop->rounding_type = 0;
vop->top_field_first = 1;
vop->alternate_vertical_scan_flag = 0;
vop->fcode_forward = 1;
vop->fcode_backward = 1;
/* Compute macroblock informations */
if (vol->interlaced)
vop->mb_height = (2 * (vol->height + 31) / 32);
else
vop->mb_height = (vol->height + 15) / 16;
vop->mb_width = (vol->width + 15) / 16;
vop->mb_num = vop->mb_height * vop->mb_width;
READ_UINT8 (&br, coding_type, 2);
vop->coding_type = coding_type;
READ_UINT8 (&br, modulo_time_base, 1);
while (modulo_time_base) {
vop->modulo_time_base++;
READ_UINT8 (&br, modulo_time_base, 1);
}
CHECK_REMAINING (&br, vol->vop_time_increment_bits + 3);
MARKER_UNCHECKED (&br);
vop->time_increment =
gst_bit_reader_get_bits_uint16_unchecked (&br,
vol->vop_time_increment_bits);
MARKER_UNCHECKED (&br);
vop->coded = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
if (!vop->coded)
return GST_MPEG4_PARSER_OK;
if (vol->newpred_enable) {
guint16 nbbits =
vop->time_increment + 3 < 15 ? vop->time_increment + 3 : 15;
READ_UINT16 (&br, vop->id, nbbits);
READ_UINT8 (&br, vop->id_for_prediction_indication, 1);
if (vop->id_for_prediction_indication) {
/* Would be nice if the standard actually told us... */
READ_UINT16 (&br, vop->id, nbbits);
CHECK_MARKER (&br);
}
}
if (vol->shape != GST_MPEG4_BINARY_ONLY &&
(vop->coding_type == GST_MPEG4_P_VOP ||
(vop->coding_type == GST_MPEG4_S_VOP &&
vol->sprite_enable == GST_MPEG4_SPRITE_GMG)))
READ_UINT8 (&br, vop->rounding_type, 1);
if ((vol->reduced_resolution_vop_enable) &&
(vol->shape == GST_MPEG4_RECTANGULAR ||
(vop->coding_type = GST_MPEG4_P_VOP ||
vop->coding_type == GST_MPEG4_I_VOP)))
READ_UINT8 (&br, vop->reduced_resolution, 1);
if (vol->shape != GST_MPEG4_RECTANGULAR) {
if (vol->sprite_enable == GST_MPEG4_SPRITE_STATIC &&
vop->coding_type == GST_MPEG4_I_VOP) {
CHECK_REMAINING (&br, 55);
vop->width = gst_bit_reader_get_bits_uint16_unchecked (&br, 13);
MARKER_UNCHECKED (&br);
vop->height = gst_bit_reader_get_bits_uint16_unchecked (&br, 13);
MARKER_UNCHECKED (&br);
vop->horizontal_mc_spatial_ref =
gst_bit_reader_get_bits_uint16_unchecked (&br, 13);
MARKER_UNCHECKED (&br);
vop->vertical_mc_spatial_ref =
gst_bit_reader_get_bits_uint16_unchecked (&br, 13);
MARKER_UNCHECKED (&br);
/* Recompute the Macroblock informations
* accordingly to the new values */
if (vol->interlaced)
vop->mb_height = (2 * (vol->height + 31) / 32);
else
vop->mb_height = (vol->height + 15) / 16;
vop->mb_width = (vol->width + 15) / 16;
vop->mb_num = vop->mb_height * vop->mb_width;
}
if ((vol->shape != GST_MPEG4_BINARY_ONLY) &&
vol->scalability && vol->enhancement_type)
READ_UINT8 (&br, vop->background_composition, 1);
READ_UINT8 (&br, vop->change_conv_ratio_disable, 1);
READ_UINT8 (&br, vop->constant_alpha, 1);
if (vop->constant_alpha)
READ_UINT8 (&br, vop->constant_alpha_value, 1);
}
if (vol->shape != GST_MPEG4_BINARY_ONLY) {
if (!vol->complexity_estimation_disable) {
GST_WARNING ("Complexity estimation not supported");
goto failed;
}
READ_UINT8 (&br, vop->intra_dc_vlc_thr, 3);
if (vol->interlaced) {
READ_UINT8 (&br, vop->top_field_first, 1);
READ_UINT8 (&br, vop->alternate_vertical_scan_flag, 1);
}
}
if ((vol->sprite_enable == GST_MPEG4_SPRITE_STATIC ||
vol->sprite_enable == GST_MPEG4_SPRITE_GMG) &&
vop->coding_type == GST_MPEG4_S_VOP) {
/* only if @sprite_trajectory is not NULL we parse it */
if (sprite_trajectory && vol->no_of_sprite_warping_points)
parse_sprite_trajectory (&br, sprite_trajectory,
vol->no_of_sprite_warping_points);
if (vol->sprite_brightness_change) {
GST_WARNING ("sprite_brightness_change not supported");
goto failed;
}
if (vol->sprite_enable == GST_MPEG4_SPRITE_STATIC) {
GST_WARNING ("sprite enable static not supported");
goto failed;
}
}
if (vol->shape != GST_MPEG4_BINARY_ONLY) {
READ_UINT16 (&br, vop->quant, vol->quant_precision);
if (vol->shape == GST_MPEG4_GRAYSCALE) {
/* TODO implement grayscale support */
GST_WARNING ("Grayscale shapes no supported");
/* TODO implement me */
goto failed;
}
if (vop->coding_type != GST_MPEG4_I_VOP) {
READ_UINT8 (&br, vop->fcode_forward, 3);
CHECK_ALLOWED (vop->fcode_forward, 1, 7);
}
if (vop->coding_type == GST_MPEG4_B_VOP) {
READ_UINT8 (&br, vop->fcode_backward, 3);
CHECK_ALLOWED (vop->fcode_backward, 1, 7);
}
}
if (!vol->scalability) {
if (vol->shape != GST_MPEG4_RECTANGULAR)
READ_UINT8 (&br, vop->shape_coding_type, 1);
} else {
if (vol->enhancement_type) {
READ_UINT8 (&br, vop->load_backward_shape, 1);
if (vop->load_backward_shape) {
GST_WARNING ("Load backward shape not supported");
goto failed;
}
READ_UINT8 (&br, vop->ref_select_code, 2);
}
}
vop->size = gst_bit_reader_get_pos (&br);
/* More things to possibly parse ... */
return GST_MPEG4_PARSER_OK;
failed:
GST_WARNING ("failed parsing \"Video Object Plane\"");
return GST_MPEG4_PARSER_ERROR;
wrong_start_code:
GST_WARNING ("got buffer with wrong start code");
goto failed;
}
gboolean
mpeg_util_parse_picture_coding_extension (MPEGPictureExt * ext,
GstBuffer * buffer)
{
GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buffer);
/* skip sync word */
if (!gst_bit_reader_skip (&reader, 8 * 4))
return FALSE;
/* skip extension code */
if (!gst_bit_reader_skip (&reader, 4))
return FALSE;
/* f_code */
READ_UINT8 (&reader, ext->f_code[0][0], 4);
READ_UINT8 (&reader, ext->f_code[0][1], 4);
READ_UINT8 (&reader, ext->f_code[1][0], 4);
READ_UINT8 (&reader, ext->f_code[1][1], 4);
/* intra DC precision */
READ_UINT8 (&reader, ext->intra_dc_precision, 2);
/* picture structure */
READ_UINT8 (&reader, ext->picture_structure, 2);
/* top field first */
READ_UINT8 (&reader, ext->top_field_first, 1);
/* frame pred frame dct */
READ_UINT8 (&reader, ext->frame_pred_frame_dct, 1);
/* concealment motion vectors */
READ_UINT8 (&reader, ext->concealment_motion_vectors, 1);
/* q scale type */
READ_UINT8 (&reader, ext->q_scale_type, 1);
/* intra vlc format */
READ_UINT8 (&reader, ext->intra_vlc_format, 1);
/* alternate scan */
READ_UINT8 (&reader, ext->alternate_scan, 1);
/* repeat first field */
READ_UINT8 (&reader, ext->repeat_first_field, 1);
/* chroma_420_type */
READ_UINT8 (&reader, ext->chroma_420_type, 1);
/* progressive_frame */
READ_UINT8 (&reader, ext->progressive_frame, 1);
return TRUE;
error:
GST_WARNING ("error parsing \"Picture Coding Extension\"");
return FALSE;
}
gboolean
mpeg4_util_parse_VOL (GstBuffer * buf, Mpeg4VisualObject * vo,
Mpeg4VideoObjectLayer * vol)
{
GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buf);
guint8 video_object_layer_start_code;
guint8 aspect_ratio_info;
guint8 control_parameters;
guint8 not_8_bit;
/* set default values */
vol->verid = vo->verid;
vol->priority = vo->priority;
vol->low_delay = FALSE;
vol->chroma_format = 1;
vol->vbv_parameters = FALSE;
vol->quant_precision = 5;
vol->bits_per_pixel = 8;
vol->quarter_sample = FALSE;
/* start code prefix */
SKIP (&reader, 24);
READ_UINT8 (&reader, video_object_layer_start_code, 8);
if (!(video_object_layer_start_code >= MPEG4_PACKET_VOL_MIN &&
video_object_layer_start_code <= MPEG4_PACKET_VOL_MAX))
goto wrong_start_code;
READ_UINT8 (&reader, vol->random_accesible_vol, 1);
READ_UINT8 (&reader, vol->video_object_type_indication, 8);
READ_UINT8 (&reader, vol->is_object_layer_identifier, 1);
if (vol->is_object_layer_identifier) {
READ_UINT8 (&reader, vol->verid, 4);
READ_UINT8 (&reader, vol->priority, 3);
}
READ_UINT8 (&reader, aspect_ratio_info, 4);
if (aspect_ratio_info != 0xff)
mpeg4_util_par_from_info (aspect_ratio_info, &vol->par_n, &vol->par_d);
else {
READ_UINT8 (&reader, vol->par_n, 8);
CHECK_ALLOWED (vol->par_n, 1, 255);
READ_UINT8 (&reader, vol->par_d, 8);
CHECK_ALLOWED (vol->par_d, 1, 255);
}
READ_UINT8 (&reader, control_parameters, 1);
if (control_parameters) {
READ_UINT8 (&reader, vol->chroma_format, 2);
READ_UINT8 (&reader, vol->low_delay, 1);
READ_UINT8 (&reader, vol->vbv_parameters, 1);
if (vol->vbv_parameters) {
guint16 first_half, latter_half;
guint8 latter_part;
READ_UINT16 (&reader, first_half, 15);
SKIP (&reader, 1);
READ_UINT16 (&reader, latter_half, 15);
SKIP (&reader, 1);
vol->bit_rate = (first_half << 15) | latter_half;
READ_UINT16 (&reader, first_half, 15);
SKIP (&reader, 1);
READ_UINT8 (&reader, latter_part, 3);
SKIP (&reader, 1);
vol->vbv_buffer_size = (first_half << 15) | latter_part;
}
}
READ_UINT8 (&reader, vol->shape, 2);
if (vol->shape != 0x0)
goto invalid_shape;
/* marker_bit */
SKIP (&reader, 1);
READ_UINT16 (&reader, vol->vop_time_increment_resolution, 16);
CHECK_ALLOWED (vol->vop_time_increment_resolution, 1, G_MAXUINT16);
vol->vop_time_increment_bits =
g_bit_storage (vol->vop_time_increment_resolution);
/* marker_bit */
SKIP (&reader, 1);
READ_UINT8 (&reader, vol->fixed_vop_rate, 1);
if (vol->fixed_vop_rate)
READ_UINT16 (&reader, vol->fixed_vop_time_increment,
vol->vop_time_increment_bits);
/* marker bit */
SKIP (&reader, 1);
READ_UINT16 (&reader, vol->width, 13);
/* marker bit */
SKIP (&reader, 1);
READ_UINT16 (&reader, vol->height, 13);
/* marker bit */
SKIP (&reader, 1);
READ_UINT8 (&reader, vol->interlaced, 1);
READ_UINT8 (&reader, vol->obmc_disable, 1);
if (vol->verid == 0x1) {
READ_UINT8 (&reader, vol->sprite_enable, 1);
} else
READ_UINT8 (&reader, vol->sprite_enable, 2);
if (vol->sprite_enable != 0x0)
goto invalid_sprite_enable;
READ_UINT8 (&reader, not_8_bit, 1);
if (not_8_bit) {
READ_UINT8 (&reader, vol->quant_precision, 4);
CHECK_ALLOWED (vol->quant_precision, 3, 9);
READ_UINT8 (&reader, vol->bits_per_pixel, 4);
CHECK_ALLOWED (vol->bits_per_pixel, 4, 12);
}
READ_UINT8 (&reader, vol->quant_type, 1);
if (vol->quant_type) {
if (!mpeg4_util_parse_quant (&reader, vol->intra_quant_mat,
default_intra_quant_mat))
goto error;
if (!mpeg4_util_parse_quant (&reader, vol->non_intra_quant_mat,
default_non_intra_quant_mat))
goto error;
} else {
memset (&vol->intra_quant_mat, 0, 64);
memset (&vol->non_intra_quant_mat, 0, 64);
}
if (vol->verid != 0x1)
READ_UINT8 (&reader, vol->quarter_sample, 1);
READ_UINT8 (&reader, vol->complexity_estimation_disable, 1);
if (!vol->complexity_estimation_disable)
goto complexity_estimation_error;
READ_UINT8 (&reader, vol->resync_marker_disable, 1);
return TRUE;
error:
GST_WARNING ("error parsing \"Video Object Layer\"");
return FALSE;
wrong_start_code:
GST_WARNING ("got buffer with wrong start code");
goto error;
invalid_shape:
GST_WARNING ("we only support rectangular shape");
goto error;
invalid_sprite_enable:
GST_WARNING ("we only support sprite_enable == 0");
goto error;
complexity_estimation_error:
GST_WARNING ("don't support complexity estimation");
goto error;
}
/**
* gst_mpeg4_parse_video_plane_with_short_header:
* @shorthdr: The #GstMpeg4VideoPlaneShortHdr to parse
* @data: The data to parse
* @size: The size of the @data to parse
*/
GstMpeg4ParseResult
gst_mpeg4_parse_video_plane_short_header (GstMpeg4VideoPlaneShortHdr *
shorthdr, const guint8 * data, gsize size)
{
guint8 zero_bits;
GstBitReader br = GST_BIT_READER_INIT (data, size);
g_return_val_if_fail (shorthdr != NULL, GST_MPEG4_PARSER_ERROR);
if (gst_bit_reader_get_remaining (&br) < 48)
goto failed;
if (gst_bit_reader_get_bits_uint32_unchecked (&br, 22) != 0x20)
goto failed;
shorthdr->temporal_reference =
gst_bit_reader_get_bits_uint8_unchecked (&br, 8);
CHECK_MARKER (&br);
zero_bits = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
if (zero_bits != 0x00)
goto failed;
shorthdr->split_screen_indicator =
gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
shorthdr->document_camera_indicator =
gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
shorthdr->full_picture_freeze_release =
gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
shorthdr->source_format = gst_bit_reader_get_bits_uint8_unchecked (&br, 3);
/* Set parameters/Table 6-25 */
switch (shorthdr->source_format) {
case 0x01:
shorthdr->vop_width = 128;
shorthdr->vop_height = 96;
shorthdr->num_macroblocks_in_gob = 8;
shorthdr->num_gobs_in_vop = 6;
break;
case 0x02:
shorthdr->vop_width = 176;
shorthdr->vop_height = 144;
shorthdr->num_macroblocks_in_gob = 11;
shorthdr->num_gobs_in_vop = 9;
break;
case 0x03:
shorthdr->vop_width = 352;
shorthdr->vop_height = 288;
shorthdr->num_macroblocks_in_gob = 22;
shorthdr->num_gobs_in_vop = 18;
break;
case 0x04:
shorthdr->vop_width = 704;
shorthdr->vop_height = 576;
shorthdr->num_macroblocks_in_gob = 88;
shorthdr->num_gobs_in_vop = 18;
break;
case 0x05:
shorthdr->vop_width = 1408;
shorthdr->vop_height = 1152;
shorthdr->num_macroblocks_in_gob = 352;
shorthdr->num_gobs_in_vop = 18;
break;
default:
shorthdr->vop_width = 0;
shorthdr->vop_height = 0;
shorthdr->num_macroblocks_in_gob = 0;
shorthdr->num_gobs_in_vop = 0;
}
shorthdr->picture_coding_type =
gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
zero_bits = gst_bit_reader_get_bits_uint8_unchecked (&br, 4);
if (zero_bits != 0x00)
goto failed;
shorthdr->vop_quant = gst_bit_reader_get_bits_uint8_unchecked (&br, 5);
zero_bits = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
if (zero_bits != 0x00)
goto failed;
do {
READ_UINT8 (&br, shorthdr->pei, 1);
if (shorthdr->pei == 1)
READ_UINT8 (&br, shorthdr->psupp, 8);
} while (shorthdr->pei == 1);
shorthdr->size = gst_bit_reader_get_pos (&br);
return GST_MPEG4_PARSER_OK;
failed:
GST_WARNING ("Could not parse the Plane short header");
return GST_MPEG4_PARSER_ERROR;
}
/**
* gst_mpeg4_parse_video_packet_header:
* @videopackethdr: The #GstMpeg4VideoPacketHdr structure to fill
* @vol: The last parsed #GstMpeg4VideoObjectLayer, will be updated
* with the informations found during the parsing
* @vop: The last parsed #GstMpeg4VideoObjectPlane, will be updated
* with the informations found during the parsing
* @sprite_trajectory: A #GstMpeg4SpriteTrajectory to fill or %NULL
* with the informations found during the parsing
* @data: The data to parse, should be set after the resync marker.
* @size: The size of the data to parse
*
* Parsers @data containing the video packet header
* and fills the @videopackethdr structure
*/
GstMpeg4ParseResult
gst_mpeg4_parse_video_packet_header (GstMpeg4VideoPacketHdr * videopackethdr,
GstMpeg4VideoObjectLayer * vol, GstMpeg4VideoObjectPlane * vop,
GstMpeg4SpriteTrajectory * sprite_trajectory, const guint8 * data,
gsize size)
{
guint8 markersize;
GstBitReader br = GST_BIT_READER_INIT (data, size);
g_return_val_if_fail (videopackethdr != NULL, GST_MPEG4_PARSER_ERROR);
g_return_val_if_fail (vol != NULL, GST_MPEG4_PARSER_ERROR);
markersize = compute_resync_marker_size (vop, NULL, NULL);
CHECK_REMAINING (&br, markersize);
if (gst_bit_reader_get_bits_uint32_unchecked (&br, markersize) != 0x01)
goto failed;
if (vol->shape != GST_MPEG4_RECTANGULAR) {
READ_UINT8 (&br, videopackethdr->header_extension_code, 1);
if (vol->sprite_enable == GST_MPEG4_SPRITE_STATIC &&
vop->coding_type == GST_MPEG4_I_VOP) {
CHECK_REMAINING (&br, 56);
U_READ_UINT16 (&br, vop->width, 13);
CHECK_MARKER (&br);
U_READ_UINT16 (&br, vop->height, 13);
CHECK_MARKER (&br);
U_READ_UINT16 (&br, vop->horizontal_mc_spatial_ref, 13);
CHECK_MARKER (&br);
U_READ_UINT16 (&br, vop->vertical_mc_spatial_ref, 13);
CHECK_MARKER (&br);
/* Update macroblock infirmations */
vop->mb_height = (vop->height + 15) / 16;
vop->mb_width = (vop->width + 15) / 16;
vop->mb_num = vop->mb_height * vop->mb_width;
}
}
READ_UINT16 (&br, videopackethdr->macroblock_number,
g_bit_storage (vop->mb_num - 1));
if (vol->shape != GST_MPEG4_BINARY_ONLY)
READ_UINT16 (&br, videopackethdr->quant_scale, vol->quant_precision);
if (vol->shape == GST_MPEG4_RECTANGULAR)
READ_UINT8 (&br, videopackethdr->header_extension_code, 1);
if (videopackethdr->header_extension_code) {
guint timeincr = 0;
guint8 bit = 0, coding_type;
do {
READ_UINT8 (&br, bit, 1);
timeincr++;
} while (bit);
vol->vop_time_increment_bits = timeincr;
CHECK_MARKER (&br);
READ_UINT16 (&br, vop->time_increment, timeincr);
CHECK_MARKER (&br);
READ_UINT8 (&br, coding_type, 2);
vop->coding_type = coding_type;
if (vol->shape != GST_MPEG4_RECTANGULAR) {
READ_UINT8 (&br, vop->change_conv_ratio_disable, 1);
if (vop->coding_type != GST_MPEG4_I_VOP)
READ_UINT8 (&br, vop->shape_coding_type, 1);
}
if (vol->shape != GST_MPEG4_BINARY_ONLY) {
READ_UINT8 (&br, vop->intra_dc_vlc_thr, 3);
if (sprite_trajectory && vol->sprite_enable == GST_MPEG4_SPRITE_GMG &&
vop->coding_type == GST_MPEG4_S_VOP &&
vol->no_of_sprite_warping_points > 0) {
parse_sprite_trajectory (&br, sprite_trajectory,
vol->no_of_sprite_warping_points);
}
if (vol->reduced_resolution_vop_enable &&
vol->shape == GST_MPEG4_RECTANGULAR &&
(vop->coding_type == GST_MPEG4_P_VOP ||
vop->coding_type == GST_MPEG4_I_VOP))
READ_UINT8 (&br, vop->reduced_resolution, 1);
if (vop->coding_type != GST_MPEG4_I_VOP) {
READ_UINT8 (&br, vop->fcode_forward, 3);
CHECK_ALLOWED (vop->fcode_forward, 1, 7);
}
if (vop->coding_type == GST_MPEG4_B_VOP) {
READ_UINT8 (&br, vop->fcode_backward, 3);
CHECK_ALLOWED (vop->fcode_backward, 1, 7);
}
}
}
if (vol->newpred_enable) {
guint16 nbbits =
vol->vop_time_increment_bits + 3 < 15 ? vop->time_increment + 3 : 15;
READ_UINT16 (&br, vop->id, nbbits);
READ_UINT8 (&br, vop->id_for_prediction_indication, 1);
if (vop->id_for_prediction_indication) {
/* Would be nice if the standard actually told us... */
READ_UINT16 (&br, vop->id, nbbits);
CHECK_MARKER (&br);
}
}
videopackethdr->size = gst_bit_reader_get_pos (&br);
failed:
GST_DEBUG ("Failed to parse video packet header");
return GST_MPEG4_PARSER_NO_PACKET;
}
/**
* gst_mpeg4_parse_video_object_layer:
* @vol: The #GstMpeg4VideoObjectLayer structure to fill
* @vo: The #GstMpeg4VisualObject currently being parsed or %NULL
* @data: The data to parse
* @size: The size of the @data to parse
*
* Parses @data containing the video object layer packet, and fills
* the @vol structure.
*
* Returns: a #GstMpeg4ParseResult
*/
GstMpeg4ParseResult
gst_mpeg4_parse_video_object_layer (GstMpeg4VideoObjectLayer * vol,
GstMpeg4VisualObject * vo, const guint8 * data, gsize size)
{
guint8 video_object_layer_start_code;
/* Used for enums types */
guint8 tmp;
GstBitReader br = GST_BIT_READER_INIT (data, size);
g_return_val_if_fail (vol != NULL, GST_MPEG4_PARSER_ERROR);
GST_DEBUG ("Parsing video object layer");
READ_UINT8 (&br, video_object_layer_start_code, 8);
if (!(video_object_layer_start_code >= GST_MPEG4_VIDEO_LAYER_FIRST &&
video_object_layer_start_code <= GST_MPEG4_VIDEO_LAYER_LAST))
goto wrong_start_code;
/* set default values */
if (vo) {
vol->verid = vo->verid;
vol->priority = vo->priority;
} else {
vol->verid = 1;
vol->priority = 0;
}
vol->low_delay = FALSE;
vol->chroma_format = 1;
vol->vbv_parameters = FALSE;
vol->quant_precision = 5;
vol->bits_per_pixel = 8;
vol->quarter_sample = FALSE;
vol->newpred_enable = FALSE;
vol->interlaced = 0;
vol->width = 0;
vol->height = 0;
READ_UINT8 (&br, vol->random_accessible_vol, 1);
READ_UINT8 (&br, vol->video_object_type_indication, 8);
READ_UINT8 (&br, vol->is_object_layer_identifier, 1);
if (vol->is_object_layer_identifier) {
READ_UINT8 (&br, vol->verid, 4);
READ_UINT8 (&br, vol->priority, 3);
}
READ_UINT8 (&br, tmp, 4);
vol->aspect_ratio_info = tmp;
if (vol->aspect_ratio_info != GST_MPEG4_EXTENDED_PAR) {
mpeg4_util_par_from_info (vol->aspect_ratio_info, &vol->par_width,
&vol->par_height);
} else {
gint v;
READ_UINT8 (&br, vol->par_width, 8);
v = vol->par_width;
CHECK_ALLOWED (v, 1, 255);
READ_UINT8 (&br, vol->par_height, 8);
v = vol->par_height;
CHECK_ALLOWED (v, 1, 255);
}
GST_DEBUG ("Pixel aspect ratio %d/%d", vol->par_width, vol->par_width);
READ_UINT8 (&br, vol->control_parameters, 1);
if (vol->control_parameters) {
guint8 chroma_format;
READ_UINT8 (&br, chroma_format, 2);
vol->chroma_format = chroma_format;
READ_UINT8 (&br, vol->low_delay, 1);
READ_UINT8 (&br, vol->vbv_parameters, 1);
if (vol->vbv_parameters) {
CHECK_REMAINING (&br, 79);
vol->first_half_bitrate =
gst_bit_reader_get_bits_uint16_unchecked (&br, 15);
MARKER_UNCHECKED (&br);
vol->latter_half_bitrate =
gst_bit_reader_get_bits_uint16_unchecked (&br, 15);
MARKER_UNCHECKED (&br);
vol->bit_rate =
(vol->first_half_bitrate << 15) | vol->latter_half_bitrate;
vol->first_half_vbv_buffer_size =
gst_bit_reader_get_bits_uint16_unchecked (&br, 15);
MARKER_UNCHECKED (&br);
vol->latter_half_vbv_buffer_size =
gst_bit_reader_get_bits_uint8_unchecked (&br, 3);
vol->vbv_buffer_size = (vol->first_half_vbv_buffer_size << 15) |
vol->latter_half_vbv_buffer_size;
vol->first_half_vbv_occupancy =
gst_bit_reader_get_bits_uint16_unchecked (&br, 11);
MARKER_UNCHECKED (&br);
vol->latter_half_vbv_occupancy =
gst_bit_reader_get_bits_uint16_unchecked (&br, 15);
MARKER_UNCHECKED (&br);
}
}
READ_UINT8 (&br, tmp, 2);
vol->shape = tmp;
if (vol->shape == GST_MPEG4_GRAYSCALE) {
/* TODO support grayscale shapes, for now we just pass */
/* Something the standard starts to define... */
GST_WARNING ("Grayscale shaped not supported");
goto failed;
}
if (vol->shape == GST_MPEG4_GRAYSCALE && vol->verid != 0x01)
READ_UINT8 (&br, vol->shape_extension, 4);
CHECK_REMAINING (&br, 19);
MARKER_UNCHECKED (&br);
vol->vop_time_increment_resolution =
gst_bit_reader_get_bits_uint16_unchecked (&br, 16);
if (vol->vop_time_increment_resolution < 1) {
GST_WARNING ("value not in allowed range. value: %d, range %d-%d",
vol->vop_time_increment_resolution, 1, G_MAXUINT16);
goto failed;
}
vol->vop_time_increment_bits =
g_bit_storage (vol->vop_time_increment_resolution);
MARKER_UNCHECKED (&br);
vol->fixed_vop_rate = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
if (vol->fixed_vop_rate)
READ_UINT16 (&br, vol->fixed_vop_time_increment,
vol->vop_time_increment_bits);
if (vol->shape != GST_MPEG4_BINARY_ONLY) {
if (vol->shape == GST_MPEG4_RECTANGULAR) {
CHECK_REMAINING (&br, 29);
MARKER_UNCHECKED (&br);
vol->width = gst_bit_reader_get_bits_uint16_unchecked (&br, 13);
MARKER_UNCHECKED (&br);
vol->height = gst_bit_reader_get_bits_uint16_unchecked (&br, 13);
MARKER_UNCHECKED (&br);
}
READ_UINT8 (&br, vol->interlaced, 1);
READ_UINT8 (&br, vol->obmc_disable, 1);
if (vol->verid == 0x1)
READ_UINT8 (&br, tmp, 1);
else
READ_UINT8 (&br, tmp, 2);
vol->sprite_enable = tmp;
if (vol->sprite_enable == GST_MPEG4_SPRITE_STATIC ||
vol->sprite_enable == GST_MPEG4_SPRITE_GMG) {
if (vol->sprite_enable == GST_MPEG4_SPRITE_GMG)
CHECK_REMAINING (&br, 9);
else {
CHECK_REMAINING (&br, 65);
vol->sprite_width = gst_bit_reader_get_bits_uint16_unchecked (&br, 13);
MARKER_UNCHECKED (&br);
vol->sprite_height = gst_bit_reader_get_bits_uint16_unchecked (&br, 13);
MARKER_UNCHECKED (&br);
vol->sprite_left_coordinate =
gst_bit_reader_get_bits_uint16_unchecked (&br, 13);
MARKER_UNCHECKED (&br);
vol->sprite_top_coordinate =
gst_bit_reader_get_bits_uint16_unchecked (&br, 13);
MARKER_UNCHECKED (&br);
}
vol->no_of_sprite_warping_points =
gst_bit_reader_get_bits_uint8_unchecked (&br, 6);
vol->sprite_warping_accuracy =
gst_bit_reader_get_bits_uint8_unchecked (&br, 2);
vol->sprite_brightness_change =
gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
if (vol->sprite_enable != GST_MPEG4_SPRITE_GMG)
vol->low_latency_sprite_enable =
gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
}
if (vol->verid != 0x1 && vol->shape != GST_MPEG4_RECTANGULAR)
READ_UINT8 (&br, vol->sadct_disable, 1);
READ_UINT8 (&br, vol->not_8_bit, 1);
if (vol->not_8_bit) {
READ_UINT8 (&br, vol->quant_precision, 4);
CHECK_ALLOWED (vol->quant_precision, 3, 9);
READ_UINT8 (&br, vol->bits_per_pixel, 4);
CHECK_ALLOWED (vol->bits_per_pixel, 4, 12);
}
if (vol->shape == GST_MPEG4_GRAYSCALE) {
/* We don't actually support it */
READ_UINT8 (&br, vol->no_gray_quant_update, 1);
READ_UINT8 (&br, vol->composition_method, 1);
READ_UINT8 (&br, vol->linear_composition, 1);
}
READ_UINT8 (&br, vol->quant_type, 1);
if (vol->quant_type) {
if (!parse_quant (&br, vol->intra_quant_mat, default_intra_quant_mat,
&vol->load_intra_quant_mat))
goto failed;
if (!parse_quant (&br, vol->non_intra_quant_mat,
default_non_intra_quant_mat, &vol->load_non_intra_quant_mat))
goto failed;
if (vol->shape == GST_MPEG4_GRAYSCALE) {
/* Something the standard starts to define... */
GST_WARNING ("Grayscale shaped not supported");
goto failed;
}
} else {
memset (&vol->intra_quant_mat, 0, 64);
memset (&vol->non_intra_quant_mat, 0, 64);
}
if (vol->verid != 0x1)
READ_UINT8 (&br, vol->quarter_sample, 1);
READ_UINT8 (&br, vol->complexity_estimation_disable, 1);
if (!vol->complexity_estimation_disable) {
guint8 estimation_method;
guint8 estimation_disable;
/* skip unneeded properties */
READ_UINT8 (&br, estimation_method, 2);
if (estimation_method < 2) {
READ_UINT8 (&br, estimation_disable, 1);
if (!estimation_disable)
SKIP (&br, 6);
READ_UINT8 (&br, estimation_disable, 1);
if (!estimation_disable)
SKIP (&br, 4);
CHECK_MARKER (&br);
READ_UINT8 (&br, estimation_disable, 1);
if (!estimation_disable)
SKIP (&br, 4);
READ_UINT8 (&br, estimation_disable, 1);
if (!estimation_disable)
SKIP (&br, 6);
CHECK_MARKER (&br);
if (estimation_method == 1) {
READ_UINT8 (&br, estimation_disable, 1);
if (!estimation_disable)
SKIP (&br, 2);
}
}
}
READ_UINT8 (&br, vol->resync_marker_disable, 1);
READ_UINT8 (&br, vol->data_partitioned, 1);
if (vol->data_partitioned)
READ_UINT8 (&br, vol->reversible_vlc, 1);
if (vol->verid != 0x01) {
READ_UINT8 (&br, vol->newpred_enable, 1);
if (vol->newpred_enable)
/* requested_upstream_message_type and newpred_segment_type */
SKIP (&br, 3);
READ_UINT8 (&br, vol->reduced_resolution_vop_enable, 1);
}
READ_UINT8 (&br, vol->scalability, 1);
if (vol->scalability) {
SKIP (&br, 26); /* Few not needed props */
READ_UINT8 (&br, vol->enhancement_type, 1);
}
/* More unused infos */
} else if (vol->verid != 0x01) {
GST_WARNING ("Binary only shapes not fully supported");
goto failed;
}
/* ... */
return GST_MPEG4_PARSER_OK;
failed:
GST_WARNING ("failed parsing \"Video Object Layer\"");
return GST_MPEG4_PARSER_ERROR;
wrong_start_code:
GST_WARNING ("got buffer with wrong start code");
goto failed;
}
/**
* gst_mpeg4_parse_visual_object_sequence:
* @vos: The #GstMpeg4VisualObjectSequence structure to fill
* @data: The data to parse, should contain the visual_object_sequence_start_code
* but not the start code prefix
* @size: The size of the @data to parse
*
* Parses @data containing the visual object sequence packet, and fills
* the @vos structure.
*
* Returns: a #GstMpeg4ParseResult
*/
GstMpeg4ParseResult
gst_mpeg4_parse_visual_object_sequence (GstMpeg4VisualObjectSequence * vos,
const guint8 * data, gsize size)
{
guint8 vos_start_code;
GstBitReader br = GST_BIT_READER_INIT (data, size);
g_return_val_if_fail (vos != NULL, GST_MPEG4_PARSER_ERROR);
READ_UINT8 (&br, vos_start_code, 8);
if (vos_start_code != GST_MPEG4_VISUAL_OBJ_SEQ_START)
goto wrong_start_code;
READ_UINT8 (&br, vos->profile_and_level_indication, 8);
switch (vos->profile_and_level_indication) {
case 0x01:
vos->profile = GST_MPEG4_PROFILE_SIMPLE;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0x02:
vos->profile = GST_MPEG4_PROFILE_SIMPLE;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0x03:
vos->profile = GST_MPEG4_PROFILE_SIMPLE;
vos->level = GST_MPEG4_LEVEL3;
break;
case 0x08:
vos->profile = GST_MPEG4_PROFILE_SIMPLE;
vos->level = GST_MPEG4_LEVEL0;
break;
case 0x10:
vos->profile = GST_MPEG4_PROFILE_SIMPLE_SCALABLE;
vos->level = GST_MPEG4_LEVEL0;
break;
case 0x11:
vos->profile = GST_MPEG4_PROFILE_SIMPLE_SCALABLE;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0x12:
vos->profile = GST_MPEG4_PROFILE_SIMPLE_SCALABLE;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0x21:
vos->profile = GST_MPEG4_PROFILE_CORE;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0x22:
vos->profile = GST_MPEG4_PROFILE_CORE;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0x32:
vos->profile = GST_MPEG4_PROFILE_MAIN;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0x33:
vos->profile = GST_MPEG4_PROFILE_MAIN;
vos->level = GST_MPEG4_LEVEL3;
break;
case 0x34:
vos->profile = GST_MPEG4_PROFILE_MAIN;
vos->level = GST_MPEG4_LEVEL4;
break;
case 0x42:
vos->profile = GST_MPEG4_PROFILE_N_BIT;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0x51:
vos->profile = GST_MPEG4_PROFILE_SCALABLE_TEXTURE;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0x61:
vos->profile = GST_MPEG4_PROFILE_SIMPLE_FACE_ANIMATION;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0x62:
vos->profile = GST_MPEG4_PROFILE_SIMPLE_FACE_ANIMATION;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0x63:
vos->profile = GST_MPEG4_PROFILE_SIMPLE_FBA;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0x64:
vos->profile = GST_MPEG4_PROFILE_SIMPLE_FBA;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0x71:
vos->profile = GST_MPEG4_PROFILE_BASIC_ANIMATED_TEXTURE;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0x72:
vos->profile = GST_MPEG4_PROFILE_BASIC_ANIMATED_TEXTURE;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0x81:
vos->profile = GST_MPEG4_PROFILE_HYBRID;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0x82:
vos->profile = GST_MPEG4_PROFILE_HYBRID;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0x91:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_REALTIME_SIMPLE;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0x92:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_REALTIME_SIMPLE;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0x93:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_REALTIME_SIMPLE;
vos->level = GST_MPEG4_LEVEL3;
break;
case 0x94:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_REALTIME_SIMPLE;
vos->level = GST_MPEG4_LEVEL4;
break;
case 0xa1:
vos->profile = GST_MPEG4_PROFILE_CORE_SCALABLE;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0xa2:
vos->profile = GST_MPEG4_PROFILE_CORE_SCALABLE;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0xa3:
vos->profile = GST_MPEG4_PROFILE_CORE_SCALABLE;
vos->level = GST_MPEG4_LEVEL3;
break;
case 0xb1:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0xb2:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0xb3:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY;
vos->level = GST_MPEG4_LEVEL3;
break;
case 0xb4:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY;
vos->level = GST_MPEG4_LEVEL4;
break;
case 0xc1:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_CORE;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0xc2:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_CORE;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0xc3:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_CORE;
vos->level = GST_MPEG4_LEVEL3;
break;
case 0xd1:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_SCALABLE_TEXTURE;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0xd2:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_SCALABLE_TEXTURE;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0xd3:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_SCALABLE_TEXTURE;
vos->level = GST_MPEG4_LEVEL3;
break;
case 0xe1:
vos->profile = GST_MPEG4_PROFILE_SIMPLE_STUDIO;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0xe2:
vos->profile = GST_MPEG4_PROFILE_SIMPLE_STUDIO;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0xe3:
vos->profile = GST_MPEG4_PROFILE_SIMPLE_STUDIO;
vos->level = GST_MPEG4_LEVEL3;
break;
case 0xe4:
vos->profile = GST_MPEG4_PROFILE_SIMPLE_STUDIO;
vos->level = GST_MPEG4_LEVEL4;
break;
case 0xe5:
vos->profile = GST_MPEG4_PROFILE_CORE_STUDIO;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0xe6:
vos->profile = GST_MPEG4_PROFILE_CORE_STUDIO;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0xe7:
vos->profile = GST_MPEG4_PROFILE_CORE_STUDIO;
vos->level = GST_MPEG4_LEVEL3;
break;
case 0xe8:
vos->profile = GST_MPEG4_PROFILE_CORE_STUDIO;
vos->level = GST_MPEG4_LEVEL4;
break;
case 0xf0:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_SIMPLE;
vos->level = GST_MPEG4_LEVEL0;
break;
case 0xf1:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_SIMPLE;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0xf2:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_SIMPLE;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0xf3:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_SIMPLE;
vos->level = GST_MPEG4_LEVEL3;
break;
case 0xf4:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_SIMPLE;
vos->level = GST_MPEG4_LEVEL4;
break;
case 0xf5:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_SIMPLE;
vos->level = GST_MPEG4_LEVEL5;
break;
case 0xf7:
vos->profile = GST_MPEG4_PROFILE_ADVANCED_SIMPLE;
vos->level = GST_MPEG4_LEVEL3b;
break;
case 0xf8:
vos->profile = GST_MPEG4_PROFILE_FINE_GRANULARITY_SCALABLE;
vos->level = GST_MPEG4_LEVEL0;
break;
case 0xf9:
vos->profile = GST_MPEG4_PROFILE_FINE_GRANULARITY_SCALABLE;
vos->level = GST_MPEG4_LEVEL1;
break;
case 0xfa:
vos->profile = GST_MPEG4_PROFILE_FINE_GRANULARITY_SCALABLE;
vos->level = GST_MPEG4_LEVEL2;
break;
case 0xfb:
vos->profile = GST_MPEG4_PROFILE_FINE_GRANULARITY_SCALABLE;
vos->level = GST_MPEG4_LEVEL3;
break;
case 0xfc:
vos->profile = GST_MPEG4_PROFILE_FINE_GRANULARITY_SCALABLE;
vos->level = GST_MPEG4_LEVEL4;
break;
case 0xfd:
vos->profile = GST_MPEG4_PROFILE_FINE_GRANULARITY_SCALABLE;
vos->level = GST_MPEG4_LEVEL5;
break;
default:
vos->profile = GST_MPEG4_PROFILE_RESERVED;
vos->level = GST_MPEG4_LEVEL_RESERVED;
break;
}
return GST_MPEG4_PARSER_OK;
wrong_start_code:
GST_WARNING ("got buffer with wrong start code");
return GST_MPEG4_PARSER_ERROR;
failed:
GST_WARNING ("failed parsing \"Visual Object\"");
return GST_MPEG4_PARSER_ERROR;
}
