mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-06-23 00:10:40 +00:00
tsdemux: Minor refactoring/code cleaning
... add some debugging symbols in the mean time.
This commit is contained in:
Thibault Saunier
parent
e373df2a97
commit
6094ec27b1
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@ -639,6 +639,7 @@ mpegts_base_activate_program (MpegTSBase * base, MpegTSBaseProgram * program,
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/* activate new pmt */
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if (program->pmt_info)
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gst_structure_free (program->pmt_info);
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program->pmt_info = gst_structure_copy (pmt_info);
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program->pmt_pid = pmt_pid;
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program->pcr_pid = pcr_pid;
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@ -689,7 +690,7 @@ mpegts_base_is_psi (MpegTSBase * base, MpegTSPacketizerPacket * packet)
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if (MPEGTS_BIT_IS_SET (base->known_psi, packet->pid))
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retval = TRUE;
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/* check is it is a pes pid */
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/* check if it is a pes pid */
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if (MPEGTS_BIT_IS_SET (base->is_pes, packet->pid))
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return FALSE;
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@ -839,7 +840,6 @@ mpegts_base_apply_pmt (MpegTSBase * base,
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{
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MpegTSBaseProgram *program, *old_program;
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guint program_number;
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gboolean deactivate_old_program = FALSE;
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/* FIXME : not so sure this is valid anymore */
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if (G_UNLIKELY (base->seen_pat == FALSE)) {
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@ -870,19 +870,16 @@ mpegts_base_apply_pmt (MpegTSBase * base,
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program = mpegts_base_new_program (base, program_number, pmt_pid);
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g_hash_table_insert (base->programs,
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GINT_TO_POINTER (program_number), program);
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deactivate_old_program = TRUE;
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/* Desactivate the old program */
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mpegts_base_deactivate_program (base, old_program);
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mpegts_base_free_program (old_program);
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} else
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program = old_program;
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/* First activate program */
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mpegts_base_activate_program (base, program, pmt_pid, pmt_info);
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if (deactivate_old_program) {
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/* deactivate old pmt */ ;
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mpegts_base_deactivate_program (base, old_program);
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mpegts_base_free_program (old_program);
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}
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/* if (program->pmt_info) */
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/* gst_structure_free (program->pmt_info); */
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/* program->pmt_info = NULL; */
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@ -1266,8 +1263,7 @@ mpegts_base_chain (GstPad * pad, GstBuffer * buf)
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}
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mpegts_packetizer_push (base->packetizer, buf);
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while (((pret =
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mpegts_packetizer_next_packet (base->packetizer,
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while (((pret = mpegts_packetizer_next_packet (base->packetizer,
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&packet)) != PACKET_NEED_MORE) && res == GST_FLOW_OK) {
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if (G_UNLIKELY (pret == PACKET_BAD))
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/* bad header, skip the packet */
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@ -1319,8 +1315,9 @@ mpegts_base_scan (MpegTSBase * base)
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/* Find initial sync point */
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for (i = 0; i < 10; i++) {
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GST_DEBUG ("Grabbing %d => %d",
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i * 50 * MPEGTS_MAX_PACKETSIZE, 50 * MPEGTS_MAX_PACKETSIZE);
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GST_DEBUG ("Grabbing %d => %d", i * 50 * MPEGTS_MAX_PACKETSIZE,
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50 * MPEGTS_MAX_PACKETSIZE);
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ret = gst_pad_pull_range (base->sinkpad, i * 50 * MPEGTS_MAX_PACKETSIZE,
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50 * MPEGTS_MAX_PACKETSIZE, &buf);
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if (G_UNLIKELY (ret != GST_FLOW_OK))
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@ -1,7 +1,7 @@
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/*
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* mpegtspacketizer.c -
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* mpegtspacketizer.c -
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* Copyright (C) 2007, 2008 Alessandro Decina, Zaheer Merali
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*
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*
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* Authors:
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* Zaheer Merali <zaheerabbas at merali dot org>
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* Alessandro Decina <alessandro@nnva.org>
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@ -78,6 +78,7 @@ static gchar *get_encoding_and_convert (const gchar * text, guint length);
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#define MAX_CONTINUITY 15
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#define VERSION_NUMBER_UNSET 255
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#define TABLE_ID_UNSET 0xFF
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#define PACKET_SYNC_BYTE 0x47
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static gint
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mpegts_packetizer_stream_subtable_compare (gconstpointer a, gconstpointer b)
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@ -396,7 +397,7 @@ mpegts_packetizer_parse_descriptors (MpegTSPacketizer2 * packetizer,
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/* include length */
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desc = g_string_new_len ((gchar *) data - 2, length + 2);
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data += length;
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/* G_TYPE_GSTING is a GBoxed type and is used so properly marshalled from python */
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/* G_TYPE_GSTRING is a GBoxed type and is used so properly marshalled from python */
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g_value_init (&value, G_TYPE_GSTRING);
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g_value_take_boxed (&value, desc);
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g_value_array_append (descriptors, &value);
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@ -521,6 +522,8 @@ mpegts_packetizer_parse_pmt (MpegTSPacketizer2 * packetizer,
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program_number = GST_READ_UINT16_BE (data);
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data += 2;
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GST_DEBUG ("Parsing %d Program Map Table", program_number);
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tmp = *data++;
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section->version_number = (tmp >> 1) & 0x1F;
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section->current_next_indicator = tmp & 0x01;
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@ -565,6 +568,7 @@ mpegts_packetizer_parse_pmt (MpegTSPacketizer2 * packetizer,
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* bytes) plus the CRC */
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while (data <= end - 4 - 5) {
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stream_type = *data++;
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GST_DEBUG ("Stream type 0x%02x found", stream_type);
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pid = GST_READ_UINT16_BE (data) & 0x1FFF;
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data += 2;
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@ -2159,13 +2163,14 @@ mpegts_try_discover_packet_size (MpegTSPacketizer2 * packetizer)
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/* find first sync byte */
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pos = -1;
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for (i = 0; i < MPEGTS_MAX_PACKETSIZE; i++) {
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if (dest[i] == 0x47) {
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if (dest[i] == PACKET_SYNC_BYTE) {
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for (j = 0; j < 4; j++) {
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guint packetsize = psizes[j];
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/* check each of the packet size possibilities in turn */
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if (dest[i] == 0x47 && dest[i + packetsize] == 0x47 &&
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dest[i + packetsize * 2] == 0x47 &&
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dest[i + packetsize * 3] == 0x47) {
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if (dest[i] == PACKET_SYNC_BYTE
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&& dest[i + packetsize] == PACKET_SYNC_BYTE
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&& dest[i + packetsize * 2] == PACKET_SYNC_BYTE
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&& dest[i + packetsize * 3] == PACKET_SYNC_BYTE) {
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packetizer->know_packet_size = TRUE;
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packetizer->packet_size = packetsize;
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packetizer->caps = gst_caps_new_simple ("video/mpegts",
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@ -2200,10 +2205,10 @@ mpegts_try_discover_packet_size (MpegTSPacketizer2 * packetizer)
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GST_DEBUG ("Flushing out %d bytes", pos);
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gst_adapter_flush (packetizer->adapter, pos);
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packetizer->offset += pos;
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} else if (!packetizer->know_packet_size) {
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/* drop invalid data and move to the next possible packets */
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gst_adapter_flush (packetizer->adapter, MPEGTS_MAX_PACKETSIZE);
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}
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} else {
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/* drop invalid data and move to the next possible packets */
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GST_DEBUG ("Could not determine packet size");
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}
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return packetizer->know_packet_size;
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@ -2235,6 +2240,7 @@ mpegts_packetizer_next_packet (MpegTSPacketizer2 * packetizer,
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while ((avail = packetizer->adapter->size) >= packetizer->packet_size) {
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packet->buffer = gst_adapter_take_buffer (packetizer->adapter,
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packetizer->packet_size);
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/* M2TS packets don't start with the sync byte, all other variants do */
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if (packetizer->packet_size == MPEGTS_M2TS_PACKETSIZE) {
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packet->data_start = GST_BUFFER_DATA (packet->buffer) + 4;
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@ -2347,7 +2353,6 @@ mpegts_packetizer_push_section (MpegTSPacketizer2 * packetizer,
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sub_buf = gst_buffer_create_sub (packet->buffer,
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data - GST_BUFFER_DATA (packet->buffer), packet->data_end - data);
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stream = packetizer->streams[packet->pid];
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if (stream == NULL) {
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stream = mpegts_packetizer_stream_new ();
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@ -2356,7 +2361,7 @@ mpegts_packetizer_push_section (MpegTSPacketizer2 * packetizer,
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if (packet->payload_unit_start_indicator) {
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table_id = *data++;
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/* subtable_extension should be read from 4th and 5th bytes only if
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/* subtable_extension should be read from 4th and 5th bytes only if
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* section_syntax_indicator is 1 */
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if ((data[0] & 0x80) == 0)
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subtable_extension = 0;
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@ -2481,7 +2486,7 @@ _init_local (void)
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* @is_multibyte: Location where information whether it's a multibyte encoding
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* or not is stored
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* @returns: Name of encoding or NULL of encoding could not be detected.
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*
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*
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* The returned string should be freed with g_free () when no longer needed.
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*/
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static gchar *
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@ -44,7 +44,7 @@
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#include "payload_parsers.h"
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#include "pesparse.h"
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/*
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/*
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* tsdemux
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*
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* See TODO for explanations on improvements needed
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@ -56,7 +56,7 @@
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#define TABLE_ID_UNSET 0xFF
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/* Size of the pendingbuffers array. */
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#define TS_MAX_PENDING_BUFFERS 256
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#define TS_MAX_PENDING_BUFFERS 256
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#define PCR_WRAP_SIZE_128KBPS (((gint64)1490)*(1024*1024))
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/* small PCR for wrap detection */
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@ -1363,10 +1363,10 @@ process_section (MpegTSBase * base)
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MpegTSPacketizerPacket packet;
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MpegTSPacketizerPacketReturn pret;
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while ((!done)
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&& ((pret =
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mpegts_packetizer_next_packet (base->packetizer,
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&packet)) != PACKET_NEED_MORE)) {
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while ((!done) &&
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((pret = mpegts_packetizer_next_packet (base->packetizer, &packet))
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!= PACKET_NEED_MORE)) {
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if (G_UNLIKELY (pret == PACKET_BAD))
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/* bad header, skip the packet */
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goto next;
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@ -1375,8 +1375,9 @@ process_section (MpegTSBase * base)
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if (packet.payload != NULL && mpegts_base_is_psi (base, &packet)) {
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MpegTSPacketizerSection section;
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based =
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mpegts_packetizer_push_section (base->packetizer, &packet, §ion);
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based = mpegts_packetizer_push_section (base->packetizer, &packet,
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§ion);
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if (G_UNLIKELY (!based))
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/* bad section data */
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goto next;
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@ -1412,10 +1413,9 @@ process_pes (MpegTSBase * base, TSPcrOffset * pcroffset)
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GstTSDemux *demux = GST_TS_DEMUX (base);
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guint16 pcr_pid = 0;
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while ((!done)
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&& ((pret =
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mpegts_packetizer_next_packet (base->packetizer,
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&packet)) != PACKET_NEED_MORE)) {
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while ((!done) &&
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((pret = mpegts_packetizer_next_packet (base->packetizer, &packet))
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!= PACKET_NEED_MORE)) {
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if (G_UNLIKELY (pret == PACKET_BAD))
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/* bad header, skip the packet */
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goto next;
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@ -1428,8 +1428,9 @@ process_pes (MpegTSBase * base, TSPcrOffset * pcroffset)
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if (packet.payload != NULL && mpegts_base_is_psi (base, &packet)) {
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MpegTSPacketizerSection section;
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based =
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mpegts_packetizer_push_section (base->packetizer, &packet, §ion);
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based = mpegts_packetizer_push_section (base->packetizer, &packet,
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§ion);
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if (G_UNLIKELY (!based))
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/* bad section data */
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goto next;
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@ -1587,16 +1588,15 @@ find_timestamps (MpegTSBase * base, guint64 initoff, guint64 * offset)
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GST_DEBUG ("Scanning for timestamps");
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/* Flush what remained from before */
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mpegts_packetizer_clear (base->packetizer);
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/* Start scanning from now PAT offset */
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/* Start scanning from know PAT offset */
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while (!done) {
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ret =
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gst_pad_pull_range (base->sinkpad, i * 50 * MPEGTS_MAX_PACKETSIZE,
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ret = gst_pad_pull_range (base->sinkpad, i * 50 * MPEGTS_MAX_PACKETSIZE,
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50 * MPEGTS_MAX_PACKETSIZE, &buf);
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if (ret != GST_FLOW_OK)
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goto beach;
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mpegts_packetizer_push (base->packetizer, buf);
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done = process_section (base);
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i++;
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@ -1605,7 +1605,6 @@ find_timestamps (MpegTSBase * base, guint64 initoff, guint64 * offset)
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done = FALSE;
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i = 1;
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*offset = base->seek_offset;
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/* Search for the first PCRs */
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@ -1617,7 +1616,7 @@ find_timestamps (MpegTSBase * base, guint64 initoff, guint64 * offset)
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}
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mpegts_packetizer_clear (base->packetizer);
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/* Remove current program so we ensure looking for a PAT when scanning the
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/* Remove current program so we ensure looking for a PAT when scanning
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* for the final PCR */
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gst_structure_free (base->pat);
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base->pat = NULL;
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@ -1628,9 +1627,9 @@ find_timestamps (MpegTSBase * base, guint64 initoff, guint64 * offset)
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if (G_UNLIKELY (!gst_pad_query_peer_duration (base->sinkpad, &format,
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&total_bytes) || format != GST_FORMAT_BYTES)) {
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GST_WARNING_OBJECT (base, "Couldn't get upstream size in bytes");
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ret = GST_FLOW_ERROR;
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mpegts_packetizer_clear (base->packetizer);
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return ret;
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return GST_FLOW_ERROR;
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}
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GST_DEBUG ("Upstream is %" G_GINT64_FORMAT " bytes", total_bytes);
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@ -1640,10 +1639,11 @@ find_timestamps (MpegTSBase * base, guint64 initoff, guint64 * offset)
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GST_DEBUG ("Scanning for last sync point between:%" G_GINT64_FORMAT
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" and the end:%" G_GINT64_FORMAT, scan_offset, total_bytes);
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while ((!done) && (scan_offset < total_bytes)) {
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ret =
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gst_pad_pull_range (base->sinkpad,
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scan_offset, 50 * MPEGTS_MAX_PACKETSIZE, &buf);
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ret = gst_pad_pull_range (base->sinkpad, scan_offset,
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50 * MPEGTS_MAX_PACKETSIZE, &buf);
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if (ret != GST_FLOW_OK)
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goto beach;
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@ -1654,10 +1654,8 @@ find_timestamps (MpegTSBase * base, guint64 initoff, guint64 * offset)
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mpegts_packetizer_clear (base->packetizer);
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GST_DEBUG ("Searching PCR");
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ret =
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process_pcr (base, scan_offset - 50 * MPEGTS_MAX_PACKETSIZE, &final, 10,
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FALSE);
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ret = process_pcr (base, scan_offset - 50 * MPEGTS_MAX_PACKETSIZE, &final,
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10, FALSE);
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if (ret != GST_FLOW_OK) {
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GST_DEBUG ("Problem getting last PCRs");
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@ -1669,6 +1667,7 @@ find_timestamps (MpegTSBase * base, guint64 initoff, guint64 * offset)
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gst_segment_set_duration (&demux->segment, GST_FORMAT_TIME,
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demux->last_pcr.gsttime - demux->first_pcr.gsttime);
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demux->duration = demux->last_pcr.gsttime - demux->first_pcr.gsttime;
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GST_DEBUG ("Done, duration:%" GST_TIME_FORMAT,
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GST_TIME_ARGS (demux->duration));
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@ -1726,8 +1725,7 @@ process_pcr (MpegTSBase * base, guint64 initoff, TSPcrOffset * pcroffset,
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for (i = 0; (i < 20) && (nbpcr < numpcr); i++) {
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guint offset, size;
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ret =
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gst_pad_pull_range (base->sinkpad,
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ret = gst_pad_pull_range (base->sinkpad,
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initoff + i * 500 * base->packetsize, 500 * base->packetsize, &buf);
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if (G_UNLIKELY (ret != GST_FLOW_OK))
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