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Commit 9de8fe48 authored by Joseph Wallace's avatar Joseph Wallace
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Remove spare whitespace on blank lines.

parent e4258bfa
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Showing with 95 additions and 99 deletions
src/format_ebml.c
View file @ 9de8fe48
......@@ -81,7 +81,7 @@ struct ebml_st {
ebml_read_mode output_state;
ebml_parsing_state parse_state;
unsigned long long copy_len;
int cluster_start;
ebml_keyframe_status cluster_starts_with_keyframe;
int flush_cluster;
......@@ -91,12 +91,12 @@ struct ebml_st {
int input_position;
unsigned char *input_buffer;
int header_size;
int header_position;
int header_read_position;
unsigned char *header;
unsigned long long keyframe_track_number;
unsigned long long parsing_track_number;
int parsing_track_is_video;
......@@ -149,7 +149,7 @@ int format_ebml_get_plugin(source_t *source)
source->format = plugin;
ebml_source_state->ebml = ebml_create();
return 0;
}
......@@ -244,7 +244,7 @@ static refbuf_t *ebml_get_buffer(source_t *source)
/* ICECAST_LOG_DEBUG("EBML: generated refbuf, size %i : %hhi %hhi %hhi",
* read_bytes, refbuf->data[0], refbuf->data[1], refbuf->data[2]);
*/
if (chunk_type == EBML_CHUNK_CLUSTER_START)
{
refbuf->sync_point = 1;
......@@ -296,7 +296,6 @@ static int ebml_create_client_data(source_t *source, client_t *client)
return 0;
}
static void ebml_free_client_data (client_t *client)
{
......@@ -307,7 +306,6 @@ static void ebml_free_client_data (client_t *client)
client->format_data = NULL;
}
static void ebml_write_buf_to_file_fail (source_t *source)
{
ICECAST_LOG_WARN("Write to dump file failed, disabling");
......@@ -315,7 +313,6 @@ static void ebml_write_buf_to_file_fail (source_t *source)
source->dumpfile = NULL;
}
static void ebml_write_buf_to_file (source_t *source, refbuf_t *refbuf)
{
......@@ -338,7 +335,6 @@ static void ebml_write_buf_to_file (source_t *source, refbuf_t *refbuf)
}
/* internal ebml parsing */
static void ebml_destroy(ebml_t *ebml)
......@@ -363,7 +359,7 @@ static ebml_t *ebml_create()
ebml->input_buffer = calloc(1, EBML_SLICE_SIZE);
ebml->cluster_start = -1;
ebml->keyframe_track_number = EBML_UNKNOWN;
ebml->parsing_track_number = EBML_UNKNOWN;
ebml->parsing_track_is_video = 0;
......@@ -382,7 +378,7 @@ static int ebml_read_space(ebml_t *ebml)
switch (ebml->output_state) {
case EBML_STATE_READING_HEADER:
if (ebml->header_size != 0) {
/* The header can be read */
return ebml->header_size;
......@@ -391,22 +387,22 @@ static int ebml_read_space(ebml_t *ebml)
return 0;
}
break;
case EBML_STATE_READING_CLUSTERS:
if (ebml->cluster_start > 0) {
/* return up until just before a new cluster starts */
read_space = ebml->cluster_start;
} else {
if (ebml->position == EBML_SLICE_SIZE) {
/* The current cluster fills the buffer,
* we have no choice but to start flushing it.
*/
ebml->flush_cluster = 1;
}
if (ebml->flush_cluster) {
/* return what we have */
read_space = ebml->position;
......@@ -420,7 +416,7 @@ static int ebml_read_space(ebml_t *ebml)
return read_space;
}
ICECAST_LOG_ERROR("EBML: Invalid parser read state");
return 0;
}
......@@ -437,7 +433,7 @@ static int ebml_read(ebml_t *ebml, char *buffer, int len, ebml_chunk_type *chunk
int read_space;
int to_read;
*chunk_type = EBML_CHUNK_HEADER;
if (len < 1) {
......@@ -446,7 +442,7 @@ static int ebml_read(ebml_t *ebml, char *buffer, int len, ebml_chunk_type *chunk
switch (ebml->output_state) {
case EBML_STATE_READING_HEADER:
if (ebml->header_size != 0)
{
/* Can read a chunk of the header */
......@@ -460,9 +456,9 @@ static int ebml_read(ebml_t *ebml, char *buffer, int len, ebml_chunk_type *chunk
memcpy(buffer, ebml->header, to_read);
ebml->header_read_position += to_read;
*chunk_type = EBML_CHUNK_HEADER;
if (ebml->header_read_position == ebml->header_size) {
ebml->output_state = EBML_STATE_READING_CLUSTERS;
}
......@@ -470,17 +466,17 @@ static int ebml_read(ebml_t *ebml, char *buffer, int len, ebml_chunk_type *chunk
/* The header's not ready yet */
return 0;
}
break;
case EBML_STATE_READING_CLUSTERS:
*chunk_type = EBML_CHUNK_CLUSTER_CONTINUE;
read_space = ebml->position;
if (ebml->cluster_start == 0) {
/* new cluster is starting now */
if (ebml->cluster_starts_with_keyframe != EBML_KEYFRAME_DOES_NOT_START_CLUSTER) {
/* If we positively identified the first video frame as a non-keyframe,
* don't use this cluster as a sync point. Since some files lack
......@@ -490,7 +486,7 @@ static int ebml_read(ebml_t *ebml, char *buffer, int len, ebml_chunk_type *chunk
*/
*chunk_type = EBML_CHUNK_CLUSTER_START;
}
/* mark end of cluster */
ebml->cluster_start = -1;
} else if (ebml->cluster_start > 0) {
......@@ -509,7 +505,7 @@ static int ebml_read(ebml_t *ebml, char *buffer, int len, ebml_chunk_type *chunk
}
memcpy(buffer, ebml->buffer, to_read);
/* Shift unread data down to the start of the buffer */
memmove(ebml->buffer, ebml->buffer + to_read, ebml->position - to_read);
ebml->position -= to_read;
......@@ -517,7 +513,7 @@ static int ebml_read(ebml_t *ebml, char *buffer, int len, ebml_chunk_type *chunk
if (ebml->cluster_start > 0) {
ebml->cluster_start -= to_read;
}
break;
}
......@@ -561,56 +557,56 @@ static int ebml_wrote(ebml_t *ebml, int len)
char *track_number_id = "\xD7";
char *track_type_id = "\x83";
char *simple_block_id = "\xA3";
ebml->input_position += len;
end_of_buffer = ebml->input_buffer + ebml->input_position;
while (processing) {
/*ICECAST_LOG_DEBUG("Parse State: %i", ebml->parse_state);*/
switch (ebml->parse_state) {
case EBML_STATE_PARSING_HEADER:
case EBML_STATE_PARSING_CLUSTERS:
if (ebml->parse_state == EBML_STATE_PARSING_HEADER) {
copy_state = EBML_STATE_COPYING_TO_HEADER;
} else {
copy_state = EBML_STATE_COPYING_TO_DATA;
}
tag_length = ebml_parse_tag(ebml->input_buffer + cursor,
end_of_buffer, &payload_length);
if (tag_length > 0) {
if (payload_length == EBML_UNKNOWN) {
/* Parse all children for tags we can't skip */
payload_length = 0;
}
/* Recognize tags of interest */
if (tag_length > 4) {
if (!memcmp(ebml->input_buffer + cursor, segment_id, 4)) {
/* Parse all Segment children */
payload_length = 0;
} else if (!memcmp(ebml->input_buffer + cursor, tracks_id, 4)) {
/* Parse all Tracks children */
payload_length = 0;
}
}
if (tag_length > 1) {
if (!memcmp(ebml->input_buffer + cursor, simple_block_id, 1)) {
/* Probe SimpleBlock header for the keyframe status */
if (ebml->cluster_starts_with_keyframe == EBML_KEYFRAME_UNKNOWN) {
track_number_length = ebml_parse_var_int(ebml->input_buffer + cursor + tag_length,
end_of_buffer, &track_number);
if (track_number_length == 0) {
/* Wait for more data */
processing = 0;
......@@ -618,14 +614,14 @@ static int ebml_wrote(ebml_t *ebml, int len)
return -1;
} else if (track_number == ebml->keyframe_track_number) {
/* this block belongs to the video track */
/* skip the 16-bit timecode for now, read the flags byte */
if (cursor + tag_length + track_number_length + 2 >= ebml->input_position) {
/* Wait for more data */
processing = 0;
} else {
flags = ebml->input_buffer[cursor + tag_length + track_number_length + 2];
if (flags & 0x80) {
/* "keyframe" flag is set */
ebml->cluster_starts_with_keyframe = EBML_KEYFRAME_STARTS_CLUSTER;
......@@ -635,22 +631,22 @@ static int ebml_wrote(ebml_t *ebml, int len)
/* ICECAST_LOG_DEBUG("Found non-keyframe in track %hhu", track_number); */
}
}
}
}
} else if (!memcmp(ebml->input_buffer + cursor, track_entry_id, 1)) {
/* Parse all TrackEntry children; reset the state */
payload_length = 0;
ebml->parsing_track_number = EBML_UNKNOWN;
ebml->parsing_track_is_video = 0;
} else if (!memcmp(ebml->input_buffer + cursor, track_number_id, 1)) {
/* Probe TrackNumber for value */
value_length = ebml_parse_sized_int(ebml->input_buffer + cursor + tag_length,
end_of_buffer, payload_length, 0, &data_value);
if (value_length == 0) {
/* Wait for more data */
processing = 0;
......@@ -660,12 +656,12 @@ static int ebml_wrote(ebml_t *ebml, int len)
ebml->parsing_track_number = data_value;
ebml_check_track(ebml);
}
} else if (!memcmp(ebml->input_buffer + cursor, track_type_id, 1)) {
/* Probe TrackType for a video flag */
value_length = ebml_parse_sized_int(ebml->input_buffer + cursor + tag_length,
end_of_buffer, payload_length, 0, &data_value);
if (value_length == 0) {
/* Wait for more data */
processing = 0;
......@@ -678,20 +674,20 @@ static int ebml_wrote(ebml_t *ebml, int len)
ebml_check_track(ebml);
}
}
}
}
/* Take appropriate next action */
if (!memcmp(ebml->input_buffer + cursor, cluster_id, 4)) {
/* Found a cluster */
ebml->parse_state = EBML_STATE_START_CLUSTER;
} else if (processing) {
/* Non-cluster tag, copy it & children into buffer */
ebml->copy_len = tag_length + payload_length;
ebml->parse_state = copy_state;
}
} else if (tag_length == 0) {
......@@ -704,7 +700,7 @@ static int ebml_wrote(ebml_t *ebml, int len)
return -1;
}
break;
case EBML_STATE_START_CLUSTER:
/* found a cluster; wait to process it until
* any previous cluster tag has been flushed
......@@ -716,55 +712,55 @@ static int ebml_wrote(ebml_t *ebml, int len)
ebml->flush_cluster = 1;
processing = 0;
} else {
tag_length = ebml_parse_tag(ebml->input_buffer + cursor,
end_of_buffer, &payload_length);
/* The header has been fully read by now, publish its size. */
ebml->header_size = ebml->header_position;
/* Mark this potential sync point, prepare probe */
ebml->cluster_start = ebml->position;
ebml->cluster_starts_with_keyframe = EBML_KEYFRAME_UNKNOWN;
/* Buffer data to give us time to probe for keyframes, etc. */
ebml->flush_cluster = 0;
/* Copy cluster tag to read buffer */
ebml->copy_len = tag_length;
ebml->parse_state = EBML_STATE_COPYING_TO_DATA;
}
break;
case EBML_STATE_COPYING_TO_HEADER:
case EBML_STATE_COPYING_TO_DATA:
to_copy = ebml->input_position - cursor;
if (to_copy > ebml->copy_len) {
to_copy = ebml->copy_len;
}
if (ebml->parse_state == EBML_STATE_COPYING_TO_HEADER) {
if ((ebml->header_position + to_copy) > EBML_HEADER_MAX_SIZE) {
ICECAST_LOG_ERROR("EBML Header too large, failing");
return -1;
}
memcpy(ebml->header + ebml->header_position, ebml->input_buffer + cursor, to_copy);
ebml->header_position += to_copy;
} else if (ebml->parse_state == EBML_STATE_COPYING_TO_DATA) {
if ((ebml->position + to_copy) > EBML_SLICE_SIZE) {
to_copy = EBML_SLICE_SIZE - ebml->position;
}
memcpy(ebml->buffer + ebml->position, ebml->input_buffer + cursor, to_copy);
ebml->position += to_copy;
}
/* ICECAST_LOG_DEBUG("Copied %i of %hhu", to_copy, ebml->copy_len); */
cursor += to_copy;
ebml->copy_len -= to_copy;
if (ebml->copy_len == 0) {
/* resume parsing */
if (ebml->parse_state == EBML_STATE_COPYING_TO_HEADER) {
......@@ -776,22 +772,22 @@ static int ebml_wrote(ebml_t *ebml, int len)
/* wait for more data */
processing = 0;
}
break;
default:
processing = 0;
}
}
/* Shift unprocessed data down to the start of the buffer */
memmove(ebml->input_buffer, ebml->input_buffer + cursor, ebml->input_position - cursor);
ebml->input_position -= cursor;
return len;
}
static inline void ebml_check_track(ebml_t *ebml)
......@@ -799,7 +795,7 @@ static inline void ebml_check_track(ebml_t *ebml)
if (ebml->keyframe_track_number == EBML_UNKNOWN
&& ebml->parsing_track_is_video
&& ebml->parsing_track_number != EBML_UNKNOWN) {
ebml->keyframe_track_number = ebml->parsing_track_number;
ICECAST_LOG_DEBUG("Identified track #%ffu as the video track", ebml->keyframe_track_number);
}
......@@ -824,23 +820,23 @@ static int ebml_parse_tag(unsigned char *buffer,
int type_length;
int size_length;
unsigned long long value;
*payload_length = 0;
/* read past the type tag */
type_length = ebml_parse_var_int(buffer, buffer_end, &value);
if (type_length <= 0) {
return type_length;
}
/* read the length tag */
size_length = ebml_parse_var_int(buffer + type_length, buffer_end, payload_length);
if (size_length <= 0) {
return size_length;
}
return type_length + size_length;
}
......@@ -859,14 +855,14 @@ static int ebml_parse_var_int(unsigned char *buffer,
unsigned char mask = 0x80;
unsigned long long value;
unsigned long long unknown_marker;
if (buffer >= buffer_end) {
return 0;
}
/* find the length marker bit in the first byte */
value = buffer[0];
while (mask) {
if (value & mask) {
value = value & ~mask;
......@@ -876,26 +872,26 @@ static int ebml_parse_var_int(unsigned char *buffer,
size++;
mask = mask >> 1;
}
/* catch malformed number (no prefix) */
if (mask == 0) {
ICECAST_LOG_DEBUG("Corrupt var-int");
return -1;
}
/* catch number bigger than parsing buffer */
if (buffer + size - 1 >= buffer_end) {
return 0;
}
/* read remaining bytes of (big-endian) number */
for (i = 1; i < size; i++) {
value = (value << 8) + buffer[i];
unknown_marker = (unknown_marker << 8) + 0xFF;
}
/* catch special "unknown" length */
if (value == unknown_marker) {
*out_value = EBML_UNKNOWN;
} else {
......@@ -905,7 +901,7 @@ static int ebml_parse_var_int(unsigned char *buffer,
/*
ICECAST_LOG_DEBUG("Varint: value %lli, unknown %llu, mask %hhu, size %i", value, unknown_marker, mask, size);
*/
return size;
}
......@@ -923,27 +919,27 @@ static int ebml_parse_sized_int(unsigned char *buffer,
{
long long value;
int i;
if (len < 1 || len > 8) {
ICECAST_LOG_DEBUG("Sized int of %i bytes", len);
return -1;
}
if (buffer + len >= buffer_end) {
return 0;
}
if (is_signed && ((signed char) buffer[0]) < 0) {
value = -1;
} else {
value = 0;
}
for (i = 0; i < len; i++) {
value = (value << 8) + ((unsigned char) buffer[i]);
}
*out_value = value;
return len;
}
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