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-rw-r--r--gst-libs/ext/mplex/systems.cc762
1 files changed, 762 insertions, 0 deletions
diff --git a/gst-libs/ext/mplex/systems.cc b/gst-libs/ext/mplex/systems.cc
new file mode 100644
index 00000000..fd5b9082
--- /dev/null
+++ b/gst-libs/ext/mplex/systems.cc
@@ -0,0 +1,762 @@
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include "systems.hh"
+#include "mplexconsts.hh"
+#include <cassert>
+
+uint8_t dummy_buf[8000];
+void
+PS_Stream::Init (unsigned _mpeg, unsigned int _sector_size, off_t max_seg_size)
+{
+ max_segment_size = max_seg_size;
+ mpeg_version = _mpeg;
+ sector_size = _sector_size;
+ segment_num = 1;
+ written = 0;
+
+ sector_buf = new uint8_t[_sector_size];
+}
+
+bool PS_Stream::FileLimReached ()
+{
+ return max_segment_size != 0 && written > max_segment_size;
+}
+
+void
+PS_Stream::NextFile ()
+{
+/*
+ char prev_filename[strlen (cur_filename) + 1];
+
+ //fclose (strm);
+ ++segment_num;
+ strcpy (prev_filename, cur_filename);
+ snprintf (cur_filename, MAXPATHLEN, filename_pat, segment_num);
+ if (strcmp (prev_filename, cur_filename) == 0) {
+ mjpeg_error_exit1
+ ("Need to split output but there appears to be no %%d in the filename pattern %s",
+ filename_pat);
+ }
+ strm = fopen (cur_filename, "wb");
+ if (strm == NULL) {
+ mjpeg_error_exit1 ("Could not open for writing: %s", cur_filename);
+ }
+ */
+}
+
+/**************************************************************
+
+ Packet payload compute how much payload a sector-sized packet with the
+ specified headers can carry...
+ TODO: Should really be called "Sector Payload"
+**************************************************************/
+
+
+unsigned int
+PS_Stream::PacketPayload (MuxStream & strm,
+ Sys_header_struc * sys_header,
+ Pack_struc * pack_header, int buffers, int PTSstamp, int DTSstamp)
+{
+ int payload = sector_size - (PACKET_HEADER_SIZE + strm.zero_stuffing);
+
+ if (sys_header != NULL)
+ payload -= sys_header->length;
+ if (mpeg_version == 2) {
+ if (buffers)
+ payload -= MPEG2_BUFFERINFO_LENGTH;
+
+ payload -= MPEG2_AFTER_PACKET_LENGTH_MIN;
+ if (pack_header != NULL)
+ payload -= pack_header->length;
+ if (DTSstamp)
+ payload -= DTS_PTS_TIMESTAMP_LENGTH;
+ if (PTSstamp)
+ payload -= DTS_PTS_TIMESTAMP_LENGTH;
+
+ } else {
+ if (buffers)
+ payload -= MPEG1_BUFFERINFO_LENGTH;
+
+ payload -= MPEG1_AFTER_PACKET_LENGTH_MIN;
+ if (pack_header != NULL)
+ payload -= pack_header->length;
+ if (DTSstamp)
+ payload -= DTS_PTS_TIMESTAMP_LENGTH;
+ if (PTSstamp)
+ payload -= DTS_PTS_TIMESTAMP_LENGTH;
+ if (DTSstamp || PTSstamp)
+ payload += 1; /* No need for nostamp marker ... */
+
+ }
+
+ return payload;
+}
+
+
+
+/*************************************************************************
+ Kopiert einen TimeCode in einen Bytebuffer. Dabei wird er nach
+ MPEG-Verfahren in bits aufgesplittet.
+
+ Makes a Copy of a TimeCode in a Buffer, splitting it into bitfields
+ for MPEG-1/2 DTS/PTS fields and MPEG-1 pack scr fields
+*************************************************************************/
+
+void
+PS_Stream::BufferDtsPtsMpeg1ScrTimecode (clockticks timecode, uint8_t marker, uint8_t ** buffer)
+{
+ clockticks thetime_base;
+ uint8_t temp;
+ unsigned int msb, lsb;
+
+ /* MPEG-1 uses a 90KHz clock, extended to 300*90KHz = 27Mhz in MPEG-2 */
+ /* For these fields we only encode to MPEG-1 90Khz resolution... */
+
+ thetime_base = timecode / 300;
+ msb = (thetime_base >> 32) & 1;
+ lsb = (thetime_base & 0xFFFFFFFFLL);
+
+ temp = (marker << 4) | (msb << 3) | ((lsb >> 29) & 0x6) | 1;
+ *((*buffer)++) = temp;
+ temp = (lsb & 0x3fc00000) >> 22;
+ *((*buffer)++) = temp;
+ temp = ((lsb & 0x003f8000) >> 14) | 1;
+ *((*buffer)++) = temp;
+ temp = (lsb & 0x7f80) >> 7;
+ *((*buffer)++) = temp;
+ temp = ((lsb & 0x007f) << 1) | 1;
+ *((*buffer)++) = temp;
+
+}
+
+/*************************************************************************
+ Makes a Copy of a TimeCode in a Buffer, splitting it into bitfields
+ for MPEG-2 pack scr fields which use the full 27Mhz resolution
+
+ Did they *really* need to put a 27Mhz
+ clock source into the system stream. Does anyone really need it
+ for their decoders? Get real... I guess they thought it might allow
+ someone somewhere to save on a proper clock circuit.
+*************************************************************************/
+
+
+void
+PS_Stream::BufferMpeg2ScrTimecode (clockticks timecode, uint8_t ** buffer)
+{
+ clockticks thetime_base;
+ unsigned int thetime_ext;
+ uint8_t temp;
+ unsigned int msb, lsb;
+
+ thetime_base = timecode / 300;
+ thetime_ext = timecode % 300;
+ msb = (thetime_base >> 32) & 1;
+ lsb = thetime_base & 0xFFFFFFFFLL;
+
+
+ temp = (MARKER_MPEG2_SCR << 6) | (msb << 5) | ((lsb >> 27) & 0x18) | 0x4 | ((lsb >> 28) & 0x3);
+ *((*buffer)++) = temp;
+ temp = (lsb & 0x0ff00000) >> 20;
+ *((*buffer)++) = temp;
+ temp = ((lsb & 0x000f8000) >> 12) | 0x4 | ((lsb & 0x00006000) >> 13);
+ *((*buffer)++) = temp;
+ temp = (lsb & 0x00001fe0) >> 5;
+ *((*buffer)++) = temp;
+ temp = ((lsb & 0x0000001f) << 3) | 0x4 | ((thetime_ext & 0x00000180) >> 7);
+ *((*buffer)++) = temp;
+ temp = ((thetime_ext & 0x0000007F) << 1) | 1;
+ *((*buffer)++) = temp;
+}
+
+/*************************************************************************
+
+BufferPaddingPacket - Insert a padding packet of the desired length
+ into the specified Program/System stream buffer
+
+**************************************************************************/
+
+void
+PS_Stream::BufferPaddingPacket (int padding, uint8_t * &buffer)
+{
+ uint8_t *index = buffer;
+ int i;
+
+ assert ((mpeg_version == 2 && padding >= 6) || (mpeg_version == 1 && padding >= 7));
+
+ *(index++) = static_cast < uint8_t > (PACKET_START) >> 16;
+ *(index++) = static_cast < uint8_t > (PACKET_START & 0x00ffff) >> 8;
+ *(index++) = static_cast < uint8_t > (PACKET_START & 0x0000ff);
+ *(index++) = PADDING_STR;
+ *(index++) = static_cast < uint8_t > ((padding - 6) >> 8);
+ *(index++) = static_cast < uint8_t > ((padding - 6) & 0xff);
+ if (mpeg_version == 2) {
+ for (i = 0; i < padding - 6; i++)
+ *(index++) = static_cast < uint8_t > (STUFFING_BYTE);
+ } else {
+ *(index++) = 0x0F;
+ for (i = 0; i < padding - 7; i++)
+ *(index++) = static_cast < uint8_t > (STUFFING_BYTE);
+ }
+
+ buffer = index;
+}
+
+
+void
+PS_Stream::BufferSectorHeader (uint8_t * index,
+ Pack_struc * pack,
+ Sys_header_struc * sys_header, uint8_t * &header_end)
+{
+ /* Pack header if present */
+
+ if (pack != NULL) {
+ memcpy (index, pack->buf, pack->length);
+ index += pack->length;
+ }
+
+ /* System header if present */
+
+ if (sys_header != NULL) {
+ memcpy (index, sys_header->buf, sys_header->length);
+ index += sys_header->length;
+ }
+ header_end = index;
+}
+
+/******************************************
+ *
+ * BufferPacketHeader
+ * Construct and MPEG-1/2 header for a packet in the specified
+ * buffer (which *MUST* be long enough) and set points to the start of
+ * the payload and packet length fields.
+ *
+ ******************************************/
+
+
+void
+PS_Stream::BufferPacketHeader (uint8_t * buf,
+ uint8_t type,
+ unsigned int mpeg_version,
+ bool buffers,
+ unsigned int buffer_size,
+ uint8_t buffer_scale,
+ clockticks PTS,
+ clockticks DTS,
+ uint8_t timestamps, uint8_t * &size_field, uint8_t * &header_end)
+{
+
+ uint8_t *index = buf;
+ uint8_t *pes_header_len_field = 0;
+
+
+ /* konstante Packet Headerwerte eintragen */
+ /* write constant packet header data */
+
+ *(index++) = static_cast < uint8_t > (PACKET_START) >> 16;
+ *(index++) = static_cast < uint8_t > (PACKET_START & 0x00ffff) >> 8;
+ *(index++) = static_cast < uint8_t > (PACKET_START & 0x0000ff);
+ *(index++) = type;
+
+
+ /* we remember this offset so we can fill in the packet size field once
+ we know the actual size... */
+ size_field = index;
+ index += 2;
+
+ if (mpeg_version == 1) {
+ /* MPEG-1: buffer information */
+ if (buffers) {
+ *(index++) = static_cast < uint8_t > (0x40 | (buffer_scale << 5) | (buffer_size >> 8));
+ *(index++) = static_cast < uint8_t > (buffer_size & 0xff);
+ }
+
+ /* MPEG-1: PTS, PTS & DTS, oder gar nichts? */
+ /* should we write PTS, PTS & DTS or nothing at all ? */
+
+ switch (timestamps) {
+ case TIMESTAMPBITS_NO:
+ *(index++) = MARKER_NO_TIMESTAMPS;
+ break;
+ case TIMESTAMPBITS_PTS:
+ BufferDtsPtsMpeg1ScrTimecode (PTS, MARKER_JUST_PTS, &index);
+ break;
+ case TIMESTAMPBITS_PTS_DTS:
+ BufferDtsPtsMpeg1ScrTimecode (PTS, MARKER_PTS, &index);
+ BufferDtsPtsMpeg1ScrTimecode (DTS, MARKER_DTS, &index);
+ break;
+ }
+ } else if (type != PADDING_STR) {
+ /* MPEG-2 packet syntax header flags. */
+ /* These *DO NOT* appear in padding packets */
+ /* TODO: They don't appear in several others either! */
+ /* First byte:
+ <1,0><PES_scrambling_control:2=0><PES_priority><data_alignment_ind.=0>
+ <copyright=0><original=1> */
+ *(index++) = 0x81;
+ /* Second byte: PTS PTS_DTS or neither? Buffer info?
+ <PTS_DTS:2><ESCR=0><ES_rate=0>
+ <DSM_trick_mode:2=0><PES_CRC=0><PES_extension=(!!buffers)>
+ */
+ *(index++) = (timestamps << 6) | (!!buffers);
+ /* Third byte:
+ <PES_header_length:8> */
+ pes_header_len_field = index; /* To fill in later! */
+ index++;
+ /* MPEG-2: the timecodes if required */
+ switch (timestamps) {
+ case TIMESTAMPBITS_PTS:
+ BufferDtsPtsMpeg1ScrTimecode (PTS, MARKER_JUST_PTS, &index);
+ break;
+
+ case TIMESTAMPBITS_PTS_DTS:
+ BufferDtsPtsMpeg1ScrTimecode (PTS, MARKER_PTS, &index);
+ BufferDtsPtsMpeg1ScrTimecode (DTS, MARKER_DTS, &index);
+ break;
+ }
+
+ /* MPEG-2 The buffer information in a PES_extension */
+ if (buffers) {
+ /* MPEG-2 PES extension header
+ <PES_private_data:1=0><pack_header_field=0>
+ <program_packet_sequence_counter=0>
+ <P-STD_buffer=1><reserved:3=1><{PES_extension_flag_2=0> */
+ *(index++) = static_cast < uint8_t > (0x1e);
+ *(index++) = static_cast < uint8_t > (0x40 | (buffer_scale << 5) | (buffer_size >> 8));
+ *(index++) = static_cast < uint8_t > (buffer_size & 0xff);
+ }
+ }
+
+ if (mpeg_version == 2 && type != PADDING_STR) {
+ *pes_header_len_field = static_cast < uint8_t > (index - (pes_header_len_field + 1));
+ }
+
+ header_end = index;
+}
+
+/*************************************************************************
+ * CreateSector
+ *
+ * Creates a complete sector to carry a padding packet or a packet
+ * from one of the elementary streams. Pack and System headers are
+ * prepended if required.
+ *
+ * We allow for situations where want to
+ * deliberately reduce the payload carried by stuffing.
+ * This allows us to deal with tricky situations where the
+ * header overhead of adding in additional information
+ * would exceed the remaining payload capacity.
+ *
+ * Header stuffing and/or a padding packet is appended if the sector is
+ * unfilled. Zero stuffing after the end of a packet is also supported
+ * to allow thos wretched audio packets from VCD's to be handled.
+ *
+ * TODO: Should really be called "WriteSector"
+ * TODO: We need to add a mechanism for sub-headers of private streams
+ * to be generated...
+ *
+ *************************************************************************/
+
+
+unsigned int
+PS_Stream::CreateSector (Pack_struc * pack,
+ Sys_header_struc * sys_header,
+ unsigned int max_packet_data_size,
+ MuxStream & strm,
+ bool buffers,
+ bool end_marker, clockticks PTS, clockticks DTS, uint8_t timestamps)
+{
+ unsigned int i;
+ unsigned int j;
+ uint8_t *index;
+ uint8_t *size_offset;
+ uint8_t *fixed_packet_header_end;
+ uint8_t *pes_header_len_offset = 0;
+ unsigned int target_packet_data_size;
+ unsigned int actual_packet_data_size;
+ int packet_data_to_read;
+ unsigned int bytes_short;
+ uint8_t type = strm.stream_id;
+ uint8_t buffer_scale = strm.BufferScale ();
+ unsigned int buffer_size = strm.BufferSizeCode ();
+ unsigned int sector_pack_area;
+
+ index = sector_buf;
+
+ sector_pack_area = sector_size - strm.zero_stuffing;
+ if (end_marker)
+ sector_pack_area -= 4;
+
+ BufferSectorHeader (index, pack, sys_header, index);
+
+ /* konstante Packet Headerwerte eintragen */
+ /* write constant packet header data */
+
+ *(index++) = static_cast < uint8_t > (PACKET_START) >> 16;
+ *(index++) = static_cast < uint8_t > (PACKET_START & 0x00ffff) >> 8;
+ *(index++) = static_cast < uint8_t > (PACKET_START & 0x0000ff);
+ *(index++) = type;
+
+
+ /* we remember this offset so we can fill in the packet size field once
+ we know the actual size... */
+ size_offset = index;
+ index += 2;
+ fixed_packet_header_end = index;
+
+ if (mpeg_version == 1) {
+ /* MPEG-1: buffer information */
+ if (buffers) {
+ *(index++) = static_cast < uint8_t > (0x40 | (buffer_scale << 5) | (buffer_size >> 8));
+ *(index++) = static_cast < uint8_t > (buffer_size & 0xff);
+ }
+
+ /* MPEG-1: PTS, PTS & DTS, oder gar nichts? */
+ /* should we write PTS, PTS & DTS or nothing at all ? */
+
+ switch (timestamps) {
+ case TIMESTAMPBITS_NO:
+ *(index++) = MARKER_NO_TIMESTAMPS;
+ break;
+ case TIMESTAMPBITS_PTS:
+ BufferDtsPtsMpeg1ScrTimecode (PTS, MARKER_JUST_PTS, &index);
+ break;
+ case TIMESTAMPBITS_PTS_DTS:
+ BufferDtsPtsMpeg1ScrTimecode (PTS, MARKER_PTS, &index);
+ BufferDtsPtsMpeg1ScrTimecode (DTS, MARKER_DTS, &index);
+ break;
+ }
+ } else if (type != PADDING_STR) {
+ /* MPEG-2 packet syntax header flags. */
+ /* These *DO NOT* appear in padding packets */
+ /* TODO: They don't appear in several others either! */
+ /* First byte:
+ <1,0><PES_scrambling_control:2=0><PES_priority><data_alignment_ind.=0>
+ <copyright=0><original=1> */
+ *(index++) = 0x81;
+ /* Second byte: PTS PTS_DTS or neither? Buffer info?
+ <PTS_DTS:2><ESCR=0><ES_rate=0>
+ <DSM_trick_mode:2=0><PES_CRC=0><PES_extension=(!!buffers)>
+ */
+ *(index++) = (timestamps << 6) | (!!buffers);
+ /* Third byte:
+ <PES_header_length:8> */
+ pes_header_len_offset = index; /* To fill in later! */
+ index++;
+ /* MPEG-2: the timecodes if required */
+ switch (timestamps) {
+ case TIMESTAMPBITS_PTS:
+ BufferDtsPtsMpeg1ScrTimecode (PTS, MARKER_JUST_PTS, &index);
+ break;
+
+ case TIMESTAMPBITS_PTS_DTS:
+ BufferDtsPtsMpeg1ScrTimecode (PTS, MARKER_PTS, &index);
+ BufferDtsPtsMpeg1ScrTimecode (DTS, MARKER_DTS, &index);
+ break;
+ }
+
+ /* MPEG-2 The buffer information in a PES_extension */
+ if (buffers) {
+ /* MPEG-2 PES extension header
+ <PES_private_data:1=0><pack_header_field=0>
+ <program_packet_sequence_counter=0>
+ <P-STD_buffer=1><reserved:3=1><{PES_extension_flag_2=0> */
+ *(index++) = static_cast < uint8_t > (0x1e);
+ *(index++) = static_cast < uint8_t > (0x40 | (buffer_scale << 5) | (buffer_size >> 8));
+ *(index++) = static_cast < uint8_t > (buffer_size & 0xff);
+ }
+ }
+#ifdef MUX_DEBUG
+ // DVD MPEG2: AC3 in PRIVATE_STR_1
+ if (type == PRIVATE_STR_1) {
+ ac3_header = index;
+ // TODO: should allow multiple AC3 streams...
+ //ac3_header[0] = AC3_SUB_STR_1; // byte: Audio stream number
+ // byte: num of AC3 syncwords
+ // byte: Offset first AC3 syncword (hi)
+ // byte: Offset 2nd AC2 syncword (lo)
+ //index += 4;
+ //subheader_size = 4;
+ subheader_size = 0;
+ } else
+#endif
+
+
+ /* MPEG-1, MPEG-2: data available to be filled is packet_size less
+ * header and MPEG-1 trailer... */
+
+ target_packet_data_size = sector_pack_area - (index - sector_buf);
+
+
+ /* DEBUG: A handy consistency check when we're messing around */
+#ifdef MUX_DEBUG
+ if (type != PADDING_STR && (end_marker ? target_packet_data_size + 4 : target_packet_data_size)
+ !=
+ PacketPayload (strm, sys_header, pack, buffers,
+ timestamps & TIMESTAMPBITS_PTS, timestamps & TIMESTAMPBITS_DTS))
+ {
+ printf ("\nPacket size calculation error %d S%d P%d B%d %d %d!\n ",
+ timestamps,
+ sys_header != 0, pack != 0, buffers,
+ target_packet_data_size,
+ PacketPayload (strm, sys_header, pack, buffers,
+ timestamps & TIMESTAMPBITS_PTS, timestamps & TIMESTAMPBITS_DTS));
+ exit (1);
+ }
+#endif
+
+ /* If a maximum payload data size is specified (!=0) and is
+ smaller than the space available thats all we read (the
+ remaining space is stuffed) */
+ if (max_packet_data_size != 0 && max_packet_data_size < target_packet_data_size) {
+ packet_data_to_read = max_packet_data_size;
+ } else
+ packet_data_to_read = target_packet_data_size;
+
+
+ /* MPEG-1, MPEG-2: read in available packet data ... */
+
+ actual_packet_data_size = strm.ReadPacketPayload (index, packet_data_to_read);
+
+ // DVD MPEG2: AC3 in PRIVATE_STR_1: fill in syncword count and offset
+#ifdef MUX_DEBUG
+ if (type == PRIVATE_STR_1) {
+ unsigned int syncwords_found;
+
+ for (i = 0; i < actual_packet_data_size; ++i) {
+ if (index[i + 4] == 0x0b && i + 5 < actual_packet_data_size && index[i + 5] == 0x77) {
+ if (syncwords_found == 0) {
+ if (ac3_header[2] != static_cast < uint8_t > ((i + 1) >> 8) ||
+ ac3_header[3] != static_cast < uint8_t > ((i + 1) & 0xff))
+ printf ("BROKEN HEADER %2x %2x (%2x %2x)\n",
+ ac3_header[2],
+ ac3_header[3],
+ static_cast < uint8_t > ((i + 1) >> 8),
+ static_cast < uint8_t > ((i + 1) & 0xff));
+ }
+ ++syncwords_found;
+ }
+ }
+ }
+#endif
+ bytes_short = target_packet_data_size - actual_packet_data_size;
+
+ /* Handle the situations where we don't have enough data to fill
+ the packet size fully ...
+ Small shortfalls are dealt with by stuffing, big ones by inserting
+ padding packets.
+ */
+
+
+ if (bytes_short < MINIMUM_PADDING_PACKET_SIZE && bytes_short > 0) {
+ if (mpeg_version == 1) {
+ /* MPEG-1 stuffing happens *before* header data fields. */
+ memmove (fixed_packet_header_end + bytes_short,
+ fixed_packet_header_end, actual_packet_data_size + (index - fixed_packet_header_end)
+ );
+ for (j = 0; j < bytes_short; ++j)
+ fixed_packet_header_end[j] = static_cast < uint8_t > (STUFFING_BYTE);
+ } else {
+ memmove (index + bytes_short, index, actual_packet_data_size);
+ for (j = 0; j < bytes_short; ++j)
+ *(index + j) = static_cast < uint8_t > (STUFFING_BYTE);
+ }
+ index += bytes_short;
+ bytes_short = 0;
+ }
+
+
+ /* MPEG-2: we now know the header length... but we mustn't forget
+ to take into account any non-MPEG headers we've included.
+ Currently this only happens for AC3 audio, but who knows...
+ */
+ if (mpeg_version == 2 && type != PADDING_STR) {
+ unsigned int pes_header_len = index - (pes_header_len_offset + 1);
+
+ *pes_header_len_offset = static_cast < uint8_t > (pes_header_len);
+ }
+ index += actual_packet_data_size;
+ /* MPEG-1, MPEG-2: Now we know that actual packet size */
+ size_offset[0] = static_cast < uint8_t > ((index - size_offset - 2) >> 8);
+ size_offset[1] = static_cast < uint8_t > ((index - size_offset - 2) & 0xff);
+
+ /* The case where we have fallen short enough to allow it to be
+ dealt with by inserting a stuffing packet... */
+ if (bytes_short != 0) {
+ *(index++) = static_cast < uint8_t > (PACKET_START) >> 16;
+ *(index++) = static_cast < uint8_t > (PACKET_START & 0x00ffff) >> 8;
+ *(index++) = static_cast < uint8_t > (PACKET_START & 0x0000ff);
+ *(index++) = PADDING_STR;
+ *(index++) = static_cast < uint8_t > ((bytes_short - 6) >> 8);
+ *(index++) = static_cast < uint8_t > ((bytes_short - 6) & 0xff);
+ if (mpeg_version == 2) {
+ for (i = 0; i < bytes_short - 6; i++)
+ *(index++) = static_cast < uint8_t > (STUFFING_BYTE);
+ } else {
+ *(index++) = 0x0F; /* TODO: A.Stevens 2000 Why is this here? */
+ for (i = 0; i < bytes_short - 7; i++)
+ *(index++) = static_cast < uint8_t > (STUFFING_BYTE);
+ }
+
+ bytes_short = 0;
+ }
+
+ if (end_marker) {
+ *(index++) = static_cast < uint8_t > ((ISO11172_END) >> 24);
+ *(index++) = static_cast < uint8_t > ((ISO11172_END & 0x00ff0000) >> 16);
+ *(index++) = static_cast < uint8_t > ((ISO11172_END & 0x0000ff00) >> 8);
+ *(index++) = static_cast < uint8_t > (ISO11172_END & 0x000000ff);
+ }
+
+ for (i = 0; i < strm.zero_stuffing; i++)
+ *(index++) = static_cast < uint8_t > (0);
+
+
+ /* At this point padding or stuffing will have ensured the packet
+ is filled to target_packet_data_size
+ */
+ RawWrite (sector_buf, sector_size);
+ return actual_packet_data_size;
+}
+
+
+
+
+/*************************************************************************
+ Create_Pack
+ erstellt in einem Buffer die spezifischen Pack-Informationen.
+ Diese werden dann spaeter von der Sector-Routine nochmals
+ in dem Sektor kopiert.
+
+ writes specifical pack header information into a buffer
+ later this will be copied from the sector routine into
+ the sector buffer
+*************************************************************************/
+
+void
+PS_Stream::CreatePack (Pack_struc * pack, clockticks SCR, unsigned int mux_rate)
+{
+ uint8_t *index;
+
+ index = pack->buf;
+
+ *(index++) = static_cast < uint8_t > ((PACK_START) >> 24);
+ *(index++) = static_cast < uint8_t > ((PACK_START & 0x00ff0000) >> 16);
+ *(index++) = static_cast < uint8_t > ((PACK_START & 0x0000ff00) >> 8);
+ *(index++) = static_cast < uint8_t > (PACK_START & 0x000000ff);
+
+ if (mpeg_version == 2) {
+ /* Annoying: MPEG-2's SCR pack header time is different from
+ all the rest... */
+ BufferMpeg2ScrTimecode (SCR, &index);
+ *(index++) = static_cast < uint8_t > (mux_rate >> 14);
+ *(index++) = static_cast < uint8_t > (0xff & (mux_rate >> 6));
+ *(index++) = static_cast < uint8_t > (0x03 | ((mux_rate & 0x3f) << 2));
+ *(index++) = static_cast < uint8_t > (RESERVED_BYTE << 3 | 0); /* No pack stuffing */
+ } else {
+ BufferDtsPtsMpeg1ScrTimecode (SCR, MARKER_MPEG1_SCR, &index);
+ *(index++) = static_cast < uint8_t > (0x80 | (mux_rate >> 15));
+ *(index++) = static_cast < uint8_t > (0xff & (mux_rate >> 7));
+ *(index++) = static_cast < uint8_t > (0x01 | ((mux_rate & 0x7f) << 1));
+ }
+ pack->SCR = SCR;
+ pack->length = index - pack->buf;
+}
+
+
+/*************************************************************************
+ Create_Sys_Header
+ erstelle in einem Buffer die spezifischen Sys_Header
+ Informationen. Diese werden spaeter von der Sector-Routine
+ nochmals zum Sectorbuffer kopiert.
+
+ writes specifical system header information into a buffer
+ later this will be copied from the sector routine into
+ the sector buffer
+ RETURN: Length of header created...
+*************************************************************************/
+
+void
+PS_Stream::CreateSysHeader (Sys_header_struc * sys_header,
+ unsigned int rate_bound,
+ bool fixed,
+ int CSPS,
+ bool audio_lock, bool video_lock, vector < MuxStream * >&streams)
+{
+ uint8_t *index;
+ uint8_t *len_index;
+ int system_header_size;
+
+ index = sys_header->buf;
+ int video_bound = 0;
+ int audio_bound = 0;
+
+ vector < MuxStream * >::iterator str;
+ for (str = streams.begin (); str < streams.end (); ++str) {
+ switch (((*str)->stream_id & 0xe0)) {
+ case 0xe0: // MPEG Video
+ ++video_bound;
+ break;
+ case 0xb9: // DVD seems to use this stream id in
+ ++video_bound; // system headers for video buffer size
+ break;
+ case 0xc0:
+ ++audio_bound; // MPEG Audio
+ break;
+ default:
+ break;
+ }
+ }
+
+ /* if we are not using both streams, we should clear some
+ options here */
+
+ *(index++) = static_cast < uint8_t > ((SYS_HEADER_START) >> 24);
+ *(index++) = static_cast < uint8_t > ((SYS_HEADER_START & 0x00ff0000) >> 16);
+ *(index++) = static_cast < uint8_t > ((SYS_HEADER_START & 0x0000ff00) >> 8);
+ *(index++) = static_cast < uint8_t > (SYS_HEADER_START & 0x000000ff);
+
+ len_index = index; /* Skip length field for now... */
+ index += 2;
+
+ *(index++) = static_cast < uint8_t > (0x80 | (rate_bound >> 15));
+ *(index++) = static_cast < uint8_t > (0xff & (rate_bound >> 7));
+ *(index++) = static_cast < uint8_t > (0x01 | ((rate_bound & 0x7f) << 1));
+ *(index++) = static_cast < uint8_t > ((audio_bound << 2) | (fixed << 1) | CSPS);
+ *(index++) = static_cast < uint8_t > ((audio_lock << 7) | (video_lock << 6) | 0x20 | video_bound);
+
+ *(index++) = static_cast < uint8_t > (RESERVED_BYTE);
+ for (str = streams.begin (); str < streams.end (); ++str) {
+ *(index++) = (*str)->stream_id;
+ *(index++) = static_cast < uint8_t >
+ (0xc0 | ((*str)->BufferScale () << 5) | ((*str)->BufferSizeCode () >> 8));
+ *(index++) = static_cast < uint8_t > ((*str)->BufferSizeCode () & 0xff);
+ }
+
+
+ system_header_size = (index - sys_header->buf);
+ len_index[0] = static_cast < uint8_t > ((system_header_size - 6) >> 8);
+ len_index[1] = static_cast < uint8_t > ((system_header_size - 6) & 0xff);
+ sys_header->length = system_header_size;
+}
+
+
+void
+PS_Stream::RawWrite (uint8_t * buf, unsigned int len)
+{
+ if (callback (this, buf, len, user_data) != len) {
+ mjpeg_error_exit1 ("Failed write");
+ }
+ written += len;
+}
+
+/*
+ * Local variables:
+ * c-file-style: "stroustrup"
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-01 04:17:52 +0000