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webmenc: Clean up the truly egregious style issues.

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I'm sure I could do more, but I don't know how long this code has to
live. I think this at least makes the code a little easier to read and
understand.

Change-Id: I6ca76357f89468d4851a3d1826e7aefa498e51d1
This commit is contained in:
Tom Finegan 2013-11-06 10:02:31 -08:00
parent 4722654851
commit 1f0c2e72c4
2 changed files with 118 additions and 130 deletions
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246
webmenc.c
View File

@ -20,8 +20,8 @@
#define fseeko _fseeki64
#define ftello _ftelli64
#elif defined(_WIN32)
/* MinGW defines off_t as long
and uses f{seek,tell}o64/off64_t for large files */
/* MinGW defines off_t as long, and uses f{seek,tell}o64/off64_t for large
* files */
#define fseeko fseeko64
#define ftello ftello64
#define off_t off64_t
@ -36,11 +36,10 @@ void Ebml_Write(struct EbmlGlobal *glob,
}
#define WRITE_BUFFER(s) \
for (i = len - 1; i >= 0; i--)\
{ \
x = (char)(*(const s *)buffer_in >> (i * CHAR_BIT)); \
Ebml_Write(glob, &x, 1); \
}
for (i = len - 1; i >= 0; i--) { \
x = (char)(*(const s *)buffer_in >> (i * CHAR_BIT)); \
Ebml_Write(glob, &x, 1); \
}
void Ebml_Serialize(struct EbmlGlobal *glob,
const void *buffer_in,
@ -80,7 +79,7 @@ void Ebml_Serialize(struct EbmlGlobal *glob,
static void Ebml_SerializeUnsigned32(struct EbmlGlobal *glob,
unsigned int class_id,
uint64_t ui) {
unsigned char sizeSerialized = 4 | 0x80;
const unsigned char sizeSerialized = 4 | 0x80;
Ebml_WriteID(glob, class_id);
Ebml_Serialize(glob, &sizeSerialized, sizeof(sizeSerialized), 1);
Ebml_Serialize(glob, &ui, sizeof(ui), 4);
@ -89,31 +88,28 @@ static void Ebml_SerializeUnsigned32(struct EbmlGlobal *glob,
static void Ebml_StartSubElement(struct EbmlGlobal *glob,
EbmlLoc *ebmlLoc,
unsigned int class_id) {
/* todo this is always taking 8 bytes, this may need later optimization */
/* this is a key that says length unknown */
uint64_t unknownLen = LITERALU64(0x01FFFFFF, 0xFFFFFFFF);
const uint64_t kEbmlUnknownLength = LITERALU64(0x01FFFFFF, 0xFFFFFFFF);
Ebml_WriteID(glob, class_id);
*ebmlLoc = ftello(glob->stream);
Ebml_Serialize(glob, &unknownLen, sizeof(unknownLen), 8);
Ebml_Serialize(glob, &kEbmlUnknownLength, sizeof(kEbmlUnknownLength), 8);
}
static void Ebml_EndSubElement(struct EbmlGlobal *glob, EbmlLoc *ebmlLoc) {
off_t pos;
uint64_t size;
/* Save the current stream pointer */
/* Save the current stream pointer. */
pos = ftello(glob->stream);
/* Calculate the size of this element */
/* Calculate the size of this element. */
size = pos - *ebmlLoc - 8;
size |= LITERALU64(0x01000000, 0x00000000);
/* Seek back to the beginning of the element and write the new size */
/* Seek back to the beginning of the element and write the new size. */
fseeko(glob->stream, *ebmlLoc, SEEK_SET);
Ebml_Serialize(glob, &size, sizeof(size), 8);
/* Reset the stream pointer */
/* Reset the stream pointer. */
fseeko(glob->stream, pos, SEEK_SET);
}
@ -130,8 +126,12 @@ void write_webm_seek_element(struct EbmlGlobal *ebml,
void write_webm_seek_info(struct EbmlGlobal *ebml) {
off_t pos;
EbmlLoc start;
EbmlLoc startInfo;
uint64_t frame_time;
char version_string[64];
/* Save the current stream pointer */
/* Save the current stream pointer. */
pos = ftello(ebml->stream);
if (ebml->seek_info_pos)
@ -139,42 +139,32 @@ void write_webm_seek_info(struct EbmlGlobal *ebml) {
else
ebml->seek_info_pos = pos;
{
EbmlLoc start;
Ebml_StartSubElement(ebml, &start, SeekHead);
write_webm_seek_element(ebml, Tracks, ebml->track_pos);
write_webm_seek_element(ebml, Cues, ebml->cue_pos);
write_webm_seek_element(ebml, Info, ebml->segment_info_pos);
Ebml_EndSubElement(ebml, &start);
Ebml_StartSubElement(ebml, &start, SeekHead);
write_webm_seek_element(ebml, Tracks, ebml->track_pos);
write_webm_seek_element(ebml, Cues, ebml->cue_pos);
write_webm_seek_element(ebml, Info, ebml->segment_info_pos);
Ebml_EndSubElement(ebml, &start);
/* Create and write the Segment Info. */
if (ebml->debug) {
strcpy(version_string, "vpxenc");
} else {
strcpy(version_string, "vpxenc ");
strncat(version_string,
vpx_codec_version_str(),
sizeof(version_string) - 1 - strlen(version_string));
}
{
/* segment info */
EbmlLoc startInfo;
uint64_t frame_time;
char version_string[64];
/* Assemble version string */
if (ebml->debug) {
strcpy(version_string, "vpxenc");
} else {
strcpy(version_string, "vpxenc ");
strncat(version_string,
vpx_codec_version_str(),
sizeof(version_string) - 1 - strlen(version_string));
}
frame_time = (uint64_t)1000 * ebml->framerate.den
/ ebml->framerate.num;
ebml->segment_info_pos = ftello(ebml->stream);
Ebml_StartSubElement(ebml, &startInfo, Info);
Ebml_SerializeUnsigned(ebml, TimecodeScale, 1000000);
Ebml_SerializeFloat(ebml, Segment_Duration,
(double)(ebml->last_pts_ms + frame_time));
Ebml_SerializeString(ebml, 0x4D80, version_string);
Ebml_SerializeString(ebml, 0x5741, version_string);
Ebml_EndSubElement(ebml, &startInfo);
}
frame_time = (uint64_t)1000 * ebml->framerate.den
/ ebml->framerate.num;
ebml->segment_info_pos = ftello(ebml->stream);
Ebml_StartSubElement(ebml, &startInfo, Info);
Ebml_SerializeUnsigned(ebml, TimecodeScale, 1000000);
Ebml_SerializeFloat(ebml, Segment_Duration,
(double)(ebml->last_pts_ms + frame_time));
Ebml_SerializeString(ebml, 0x4D80, version_string);
Ebml_SerializeString(ebml, 0x5741, version_string);
Ebml_EndSubElement(ebml, &startInfo);
}
void write_webm_file_header(struct EbmlGlobal *glob,
@ -182,57 +172,56 @@ void write_webm_file_header(struct EbmlGlobal *glob,
const struct vpx_rational *fps,
stereo_format_t stereo_fmt,
unsigned int fourcc) {
{
EbmlLoc start;
Ebml_StartSubElement(glob, &start, EBML);
Ebml_SerializeUnsigned(glob, EBMLVersion, 1);
Ebml_SerializeUnsigned(glob, EBMLReadVersion, 1);
Ebml_SerializeUnsigned(glob, EBMLMaxIDLength, 4);
Ebml_SerializeUnsigned(glob, EBMLMaxSizeLength, 8);
Ebml_SerializeString(glob, DocType, "webm");
Ebml_SerializeUnsigned(glob, DocTypeVersion, 2);
Ebml_SerializeUnsigned(glob, DocTypeReadVersion, 2);
Ebml_EndSubElement(glob, &start);
}
{
Ebml_StartSubElement(glob, &glob->startSegment, Segment);
glob->position_reference = ftello(glob->stream);
glob->framerate = *fps;
write_webm_seek_info(glob);
EbmlLoc start;
EbmlLoc trackStart;
EbmlLoc videoStart;
unsigned int trackNumber = 1;
uint64_t trackID = 0;
unsigned int pixelWidth = cfg->g_w;
unsigned int pixelHeight = cfg->g_h;
{
EbmlLoc trackStart;
glob->track_pos = ftello(glob->stream);
Ebml_StartSubElement(glob, &trackStart, Tracks);
{
unsigned int trackNumber = 1;
uint64_t trackID = 0;
/* Write the EBML header. */
Ebml_StartSubElement(glob, &start, EBML);
Ebml_SerializeUnsigned(glob, EBMLVersion, 1);
Ebml_SerializeUnsigned(glob, EBMLReadVersion, 1);
Ebml_SerializeUnsigned(glob, EBMLMaxIDLength, 4);
Ebml_SerializeUnsigned(glob, EBMLMaxSizeLength, 8);
Ebml_SerializeString(glob, DocType, "webm");
Ebml_SerializeUnsigned(glob, DocTypeVersion, 2);
Ebml_SerializeUnsigned(glob, DocTypeReadVersion, 2);
Ebml_EndSubElement(glob, &start);
EbmlLoc start;
Ebml_StartSubElement(glob, &start, TrackEntry);
Ebml_SerializeUnsigned(glob, TrackNumber, trackNumber);
glob->track_id_pos = ftello(glob->stream);
Ebml_SerializeUnsigned32(glob, TrackUID, trackID);
Ebml_SerializeUnsigned(glob, TrackType, 1);
Ebml_SerializeString(glob, CodecID,
fourcc == VP8_FOURCC ? "V_VP8" : "V_VP9");
{
unsigned int pixelWidth = cfg->g_w;
unsigned int pixelHeight = cfg->g_h;
/* Open and begin writing the segment element. */
Ebml_StartSubElement(glob, &glob->startSegment, Segment);
glob->position_reference = ftello(glob->stream);
glob->framerate = *fps;
write_webm_seek_info(glob);
EbmlLoc videoStart;
Ebml_StartSubElement(glob, &videoStart, Video);
Ebml_SerializeUnsigned(glob, PixelWidth, pixelWidth);
Ebml_SerializeUnsigned(glob, PixelHeight, pixelHeight);
Ebml_SerializeUnsigned(glob, StereoMode, stereo_fmt);
Ebml_EndSubElement(glob, &videoStart);
}
Ebml_EndSubElement(glob, &start); /* Track Entry */
}
Ebml_EndSubElement(glob, &trackStart);
}
/* segment element is open */
}
/* Open and write the Tracks element. */
glob->track_pos = ftello(glob->stream);
Ebml_StartSubElement(glob, &trackStart, Tracks);
/* Open and write the Track entry. */
Ebml_StartSubElement(glob, &start, TrackEntry);
Ebml_SerializeUnsigned(glob, TrackNumber, trackNumber);
glob->track_id_pos = ftello(glob->stream);
Ebml_SerializeUnsigned32(glob, TrackUID, trackID);
Ebml_SerializeUnsigned(glob, TrackType, 1);
Ebml_SerializeString(glob, CodecID,
fourcc == VP8_FOURCC ? "V_VP8" : "V_VP9");
Ebml_StartSubElement(glob, &videoStart, Video);
Ebml_SerializeUnsigned(glob, PixelWidth, pixelWidth);
Ebml_SerializeUnsigned(glob, PixelHeight, pixelHeight);
Ebml_SerializeUnsigned(glob, StereoMode, stereo_fmt);
Ebml_EndSubElement(glob, &videoStart);
/* Close Track entry. */
Ebml_EndSubElement(glob, &start);
/* Close Tracks element. */
Ebml_EndSubElement(glob, &trackStart);
/* Segment element remains open. */
}
void write_webm_block(struct EbmlGlobal *glob,
@ -245,14 +234,16 @@ void write_webm_block(struct EbmlGlobal *glob,
int64_t pts_ms;
int start_cluster = 0, is_keyframe;
/* Calculate the PTS of this frame in milliseconds */
/* Calculate the PTS of this frame in milliseconds. */
pts_ms = pkt->data.frame.pts * 1000
* (uint64_t)cfg->g_timebase.num / (uint64_t)cfg->g_timebase.den;
if (pts_ms <= glob->last_pts_ms)
pts_ms = glob->last_pts_ms + 1;
glob->last_pts_ms = pts_ms;
/* Calculate the relative time of this block */
/* Calculate the relative time of this block. */
if (pts_ms - glob->cluster_timecode > SHRT_MAX)
start_cluster = 1;
else
@ -263,12 +254,12 @@ void write_webm_block(struct EbmlGlobal *glob,
if (glob->cluster_open)
Ebml_EndSubElement(glob, &glob->startCluster);
/* Open the new cluster */
/* Open the new cluster. */
block_timecode = 0;
glob->cluster_open = 1;
glob->cluster_timecode = (uint32_t)pts_ms;
glob->cluster_pos = ftello(glob->stream);
Ebml_StartSubElement(glob, &glob->startCluster, Cluster); /* cluster */
Ebml_StartSubElement(glob, &glob->startCluster, Cluster);
Ebml_SerializeUnsigned(glob, Timecode, glob->cluster_timecode);
/* Save a cue point if this is a keyframe. */
@ -289,7 +280,7 @@ void write_webm_block(struct EbmlGlobal *glob,
}
}
/* Write the Simple Block */
/* Write the Simple Block. */
Ebml_WriteID(glob, SimpleBlock);
block_length = (unsigned int)pkt->data.frame.sz + 4;
@ -312,44 +303,41 @@ void write_webm_block(struct EbmlGlobal *glob,
Ebml_Write(glob, pkt->data.frame.buf, (unsigned int)pkt->data.frame.sz);
}
void write_webm_file_footer(struct EbmlGlobal *glob, int hash) {
EbmlLoc start_cues;
EbmlLoc start_cue_point;
EbmlLoc start_cue_tracks;
unsigned int i;
if (glob->cluster_open)
Ebml_EndSubElement(glob, &glob->startCluster);
{
EbmlLoc start;
unsigned int i;
glob->cue_pos = ftello(glob->stream);
Ebml_StartSubElement(glob, &start_cues, Cues);
glob->cue_pos = ftello(glob->stream);
Ebml_StartSubElement(glob, &start, Cues);
for (i = 0; i < glob->cues; i++) {
struct cue_entry *cue = &glob->cue_list[i];
EbmlLoc start;
for (i = 0; i < glob->cues; i++) {
struct cue_entry *cue = &glob->cue_list[i];
Ebml_StartSubElement(glob, &start_cue_point, CuePoint);
Ebml_SerializeUnsigned(glob, CueTime, cue->time);
Ebml_StartSubElement(glob, &start, CuePoint);
{
EbmlLoc start;
Ebml_StartSubElement(glob, &start_cue_tracks, CueTrackPositions);
Ebml_SerializeUnsigned(glob, CueTrack, 1);
Ebml_SerializeUnsigned64(glob, CueClusterPosition,
cue->loc - glob->position_reference);
Ebml_EndSubElement(glob, &start_cue_tracks);
Ebml_SerializeUnsigned(glob, CueTime, cue->time);
Ebml_StartSubElement(glob, &start, CueTrackPositions);
Ebml_SerializeUnsigned(glob, CueTrack, 1);
Ebml_SerializeUnsigned64(glob, CueClusterPosition,
cue->loc - glob->position_reference);
Ebml_EndSubElement(glob, &start);
}
Ebml_EndSubElement(glob, &start);
}
Ebml_EndSubElement(glob, &start);
Ebml_EndSubElement(glob, &start_cue_point);
}
Ebml_EndSubElement(glob, &start_cues);
/* Close the Segment. */
Ebml_EndSubElement(glob, &glob->startSegment);
/* Patch up the seek info block */
/* Patch up the seek info block. */
write_webm_seek_info(glob);
/* Patch up the track id */
/* Patch up the track id. */
fseeko(glob->stream, glob->track_id_pos, SEEK_SET);
Ebml_SerializeUnsigned32(glob, TrackUID, glob->debug ? 0xDEADBEEF : hash);

2
webmenc.h
View File

@ -61,7 +61,7 @@ struct EbmlGlobal {
/* Stereo 3D packed frame format */
typedef enum stereo_format {
STEREO_FORMAT_MONO = 0,
STEREO_FORMAT_MONO = 0,
STEREO_FORMAT_LEFT_RIGHT = 1,
STEREO_FORMAT_BOTTOM_TOP = 2,
STEREO_FORMAT_TOP_BOTTOM = 3,