webmenc: Clean up the truly egregious style issues.
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
Родитель
4722654851
Коммит
1f0c2e72c4
246
webmenc.c
246
webmenc.c
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@ -20,8 +20,8 @@
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#define fseeko _fseeki64
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#define ftello _ftelli64
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#elif defined(_WIN32)
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/* MinGW defines off_t as long
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and uses f{seek,tell}o64/off64_t for large files */
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/* MinGW defines off_t as long, and uses f{seek,tell}o64/off64_t for large
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* files */
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#define fseeko fseeko64
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#define ftello ftello64
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#define off_t off64_t
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@ -36,11 +36,10 @@ void Ebml_Write(struct EbmlGlobal *glob,
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}
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#define WRITE_BUFFER(s) \
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for (i = len - 1; i >= 0; i--)\
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{ \
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x = (char)(*(const s *)buffer_in >> (i * CHAR_BIT)); \
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Ebml_Write(glob, &x, 1); \
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}
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for (i = len - 1; i >= 0; i--) { \
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x = (char)(*(const s *)buffer_in >> (i * CHAR_BIT)); \
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Ebml_Write(glob, &x, 1); \
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}
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void Ebml_Serialize(struct EbmlGlobal *glob,
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const void *buffer_in,
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@ -80,7 +79,7 @@ void Ebml_Serialize(struct EbmlGlobal *glob,
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static void Ebml_SerializeUnsigned32(struct EbmlGlobal *glob,
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unsigned int class_id,
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uint64_t ui) {
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unsigned char sizeSerialized = 4 | 0x80;
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const unsigned char sizeSerialized = 4 | 0x80;
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Ebml_WriteID(glob, class_id);
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Ebml_Serialize(glob, &sizeSerialized, sizeof(sizeSerialized), 1);
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Ebml_Serialize(glob, &ui, sizeof(ui), 4);
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@ -89,31 +88,28 @@ static void Ebml_SerializeUnsigned32(struct EbmlGlobal *glob,
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static void Ebml_StartSubElement(struct EbmlGlobal *glob,
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EbmlLoc *ebmlLoc,
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unsigned int class_id) {
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/* todo this is always taking 8 bytes, this may need later optimization */
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/* this is a key that says length unknown */
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uint64_t unknownLen = LITERALU64(0x01FFFFFF, 0xFFFFFFFF);
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const uint64_t kEbmlUnknownLength = LITERALU64(0x01FFFFFF, 0xFFFFFFFF);
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Ebml_WriteID(glob, class_id);
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*ebmlLoc = ftello(glob->stream);
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Ebml_Serialize(glob, &unknownLen, sizeof(unknownLen), 8);
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Ebml_Serialize(glob, &kEbmlUnknownLength, sizeof(kEbmlUnknownLength), 8);
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}
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static void Ebml_EndSubElement(struct EbmlGlobal *glob, EbmlLoc *ebmlLoc) {
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off_t pos;
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uint64_t size;
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/* Save the current stream pointer */
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/* Save the current stream pointer. */
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pos = ftello(glob->stream);
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/* Calculate the size of this element */
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/* Calculate the size of this element. */
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size = pos - *ebmlLoc - 8;
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size |= LITERALU64(0x01000000, 0x00000000);
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/* Seek back to the beginning of the element and write the new size */
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/* Seek back to the beginning of the element and write the new size. */
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fseeko(glob->stream, *ebmlLoc, SEEK_SET);
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Ebml_Serialize(glob, &size, sizeof(size), 8);
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/* Reset the stream pointer */
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/* Reset the stream pointer. */
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fseeko(glob->stream, pos, SEEK_SET);
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}
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@ -130,8 +126,12 @@ void write_webm_seek_element(struct EbmlGlobal *ebml,
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void write_webm_seek_info(struct EbmlGlobal *ebml) {
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off_t pos;
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EbmlLoc start;
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EbmlLoc startInfo;
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uint64_t frame_time;
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char version_string[64];
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/* Save the current stream pointer */
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/* Save the current stream pointer. */
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pos = ftello(ebml->stream);
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if (ebml->seek_info_pos)
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@ -139,42 +139,32 @@ void write_webm_seek_info(struct EbmlGlobal *ebml) {
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else
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ebml->seek_info_pos = pos;
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{
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EbmlLoc start;
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Ebml_StartSubElement(ebml, &start, SeekHead);
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write_webm_seek_element(ebml, Tracks, ebml->track_pos);
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write_webm_seek_element(ebml, Cues, ebml->cue_pos);
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write_webm_seek_element(ebml, Info, ebml->segment_info_pos);
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Ebml_EndSubElement(ebml, &start);
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Ebml_StartSubElement(ebml, &start, SeekHead);
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write_webm_seek_element(ebml, Tracks, ebml->track_pos);
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write_webm_seek_element(ebml, Cues, ebml->cue_pos);
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write_webm_seek_element(ebml, Info, ebml->segment_info_pos);
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Ebml_EndSubElement(ebml, &start);
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/* Create and write the Segment Info. */
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if (ebml->debug) {
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strcpy(version_string, "vpxenc");
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} else {
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strcpy(version_string, "vpxenc ");
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strncat(version_string,
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vpx_codec_version_str(),
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sizeof(version_string) - 1 - strlen(version_string));
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}
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{
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/* segment info */
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EbmlLoc startInfo;
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uint64_t frame_time;
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char version_string[64];
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/* Assemble version string */
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if (ebml->debug) {
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strcpy(version_string, "vpxenc");
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} else {
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strcpy(version_string, "vpxenc ");
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strncat(version_string,
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vpx_codec_version_str(),
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sizeof(version_string) - 1 - strlen(version_string));
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}
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frame_time = (uint64_t)1000 * ebml->framerate.den
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/ ebml->framerate.num;
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ebml->segment_info_pos = ftello(ebml->stream);
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Ebml_StartSubElement(ebml, &startInfo, Info);
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Ebml_SerializeUnsigned(ebml, TimecodeScale, 1000000);
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Ebml_SerializeFloat(ebml, Segment_Duration,
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(double)(ebml->last_pts_ms + frame_time));
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Ebml_SerializeString(ebml, 0x4D80, version_string);
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Ebml_SerializeString(ebml, 0x5741, version_string);
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Ebml_EndSubElement(ebml, &startInfo);
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}
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frame_time = (uint64_t)1000 * ebml->framerate.den
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/ ebml->framerate.num;
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ebml->segment_info_pos = ftello(ebml->stream);
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Ebml_StartSubElement(ebml, &startInfo, Info);
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Ebml_SerializeUnsigned(ebml, TimecodeScale, 1000000);
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Ebml_SerializeFloat(ebml, Segment_Duration,
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(double)(ebml->last_pts_ms + frame_time));
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Ebml_SerializeString(ebml, 0x4D80, version_string);
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Ebml_SerializeString(ebml, 0x5741, version_string);
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Ebml_EndSubElement(ebml, &startInfo);
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}
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void write_webm_file_header(struct EbmlGlobal *glob,
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@ -182,57 +172,56 @@ void write_webm_file_header(struct EbmlGlobal *glob,
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const struct vpx_rational *fps,
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stereo_format_t stereo_fmt,
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unsigned int fourcc) {
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{
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EbmlLoc start;
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Ebml_StartSubElement(glob, &start, EBML);
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Ebml_SerializeUnsigned(glob, EBMLVersion, 1);
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Ebml_SerializeUnsigned(glob, EBMLReadVersion, 1);
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Ebml_SerializeUnsigned(glob, EBMLMaxIDLength, 4);
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Ebml_SerializeUnsigned(glob, EBMLMaxSizeLength, 8);
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Ebml_SerializeString(glob, DocType, "webm");
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Ebml_SerializeUnsigned(glob, DocTypeVersion, 2);
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Ebml_SerializeUnsigned(glob, DocTypeReadVersion, 2);
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Ebml_EndSubElement(glob, &start);
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}
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{
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Ebml_StartSubElement(glob, &glob->startSegment, Segment);
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glob->position_reference = ftello(glob->stream);
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glob->framerate = *fps;
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write_webm_seek_info(glob);
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EbmlLoc start;
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EbmlLoc trackStart;
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EbmlLoc videoStart;
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unsigned int trackNumber = 1;
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uint64_t trackID = 0;
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unsigned int pixelWidth = cfg->g_w;
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unsigned int pixelHeight = cfg->g_h;
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{
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EbmlLoc trackStart;
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glob->track_pos = ftello(glob->stream);
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Ebml_StartSubElement(glob, &trackStart, Tracks);
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{
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unsigned int trackNumber = 1;
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uint64_t trackID = 0;
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/* Write the EBML header. */
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Ebml_StartSubElement(glob, &start, EBML);
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Ebml_SerializeUnsigned(glob, EBMLVersion, 1);
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Ebml_SerializeUnsigned(glob, EBMLReadVersion, 1);
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Ebml_SerializeUnsigned(glob, EBMLMaxIDLength, 4);
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Ebml_SerializeUnsigned(glob, EBMLMaxSizeLength, 8);
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Ebml_SerializeString(glob, DocType, "webm");
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Ebml_SerializeUnsigned(glob, DocTypeVersion, 2);
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Ebml_SerializeUnsigned(glob, DocTypeReadVersion, 2);
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Ebml_EndSubElement(glob, &start);
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EbmlLoc start;
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Ebml_StartSubElement(glob, &start, TrackEntry);
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Ebml_SerializeUnsigned(glob, TrackNumber, trackNumber);
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glob->track_id_pos = ftello(glob->stream);
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Ebml_SerializeUnsigned32(glob, TrackUID, trackID);
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Ebml_SerializeUnsigned(glob, TrackType, 1);
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Ebml_SerializeString(glob, CodecID,
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fourcc == VP8_FOURCC ? "V_VP8" : "V_VP9");
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{
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unsigned int pixelWidth = cfg->g_w;
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unsigned int pixelHeight = cfg->g_h;
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/* Open and begin writing the segment element. */
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Ebml_StartSubElement(glob, &glob->startSegment, Segment);
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glob->position_reference = ftello(glob->stream);
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glob->framerate = *fps;
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write_webm_seek_info(glob);
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EbmlLoc videoStart;
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Ebml_StartSubElement(glob, &videoStart, Video);
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Ebml_SerializeUnsigned(glob, PixelWidth, pixelWidth);
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Ebml_SerializeUnsigned(glob, PixelHeight, pixelHeight);
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Ebml_SerializeUnsigned(glob, StereoMode, stereo_fmt);
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Ebml_EndSubElement(glob, &videoStart);
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}
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Ebml_EndSubElement(glob, &start); /* Track Entry */
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}
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Ebml_EndSubElement(glob, &trackStart);
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}
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/* segment element is open */
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}
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/* Open and write the Tracks element. */
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glob->track_pos = ftello(glob->stream);
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Ebml_StartSubElement(glob, &trackStart, Tracks);
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/* Open and write the Track entry. */
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Ebml_StartSubElement(glob, &start, TrackEntry);
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Ebml_SerializeUnsigned(glob, TrackNumber, trackNumber);
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glob->track_id_pos = ftello(glob->stream);
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Ebml_SerializeUnsigned32(glob, TrackUID, trackID);
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Ebml_SerializeUnsigned(glob, TrackType, 1);
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Ebml_SerializeString(glob, CodecID,
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fourcc == VP8_FOURCC ? "V_VP8" : "V_VP9");
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Ebml_StartSubElement(glob, &videoStart, Video);
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Ebml_SerializeUnsigned(glob, PixelWidth, pixelWidth);
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Ebml_SerializeUnsigned(glob, PixelHeight, pixelHeight);
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Ebml_SerializeUnsigned(glob, StereoMode, stereo_fmt);
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Ebml_EndSubElement(glob, &videoStart);
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/* Close Track entry. */
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Ebml_EndSubElement(glob, &start);
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/* Close Tracks element. */
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Ebml_EndSubElement(glob, &trackStart);
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/* Segment element remains open. */
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}
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void write_webm_block(struct EbmlGlobal *glob,
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@ -245,14 +234,16 @@ void write_webm_block(struct EbmlGlobal *glob,
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int64_t pts_ms;
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int start_cluster = 0, is_keyframe;
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/* Calculate the PTS of this frame in milliseconds */
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/* Calculate the PTS of this frame in milliseconds. */
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pts_ms = pkt->data.frame.pts * 1000
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* (uint64_t)cfg->g_timebase.num / (uint64_t)cfg->g_timebase.den;
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if (pts_ms <= glob->last_pts_ms)
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pts_ms = glob->last_pts_ms + 1;
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glob->last_pts_ms = pts_ms;
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/* Calculate the relative time of this block */
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/* Calculate the relative time of this block. */
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if (pts_ms - glob->cluster_timecode > SHRT_MAX)
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start_cluster = 1;
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else
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@ -263,12 +254,12 @@ void write_webm_block(struct EbmlGlobal *glob,
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if (glob->cluster_open)
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Ebml_EndSubElement(glob, &glob->startCluster);
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/* Open the new cluster */
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/* Open the new cluster. */
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block_timecode = 0;
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glob->cluster_open = 1;
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glob->cluster_timecode = (uint32_t)pts_ms;
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glob->cluster_pos = ftello(glob->stream);
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Ebml_StartSubElement(glob, &glob->startCluster, Cluster); /* cluster */
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Ebml_StartSubElement(glob, &glob->startCluster, Cluster);
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Ebml_SerializeUnsigned(glob, Timecode, glob->cluster_timecode);
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/* Save a cue point if this is a keyframe. */
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@ -289,7 +280,7 @@ void write_webm_block(struct EbmlGlobal *glob,
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}
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}
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/* Write the Simple Block */
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/* Write the Simple Block. */
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Ebml_WriteID(glob, SimpleBlock);
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block_length = (unsigned int)pkt->data.frame.sz + 4;
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@ -312,44 +303,41 @@ void write_webm_block(struct EbmlGlobal *glob,
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Ebml_Write(glob, pkt->data.frame.buf, (unsigned int)pkt->data.frame.sz);
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}
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void write_webm_file_footer(struct EbmlGlobal *glob, int hash) {
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EbmlLoc start_cues;
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EbmlLoc start_cue_point;
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EbmlLoc start_cue_tracks;
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unsigned int i;
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if (glob->cluster_open)
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Ebml_EndSubElement(glob, &glob->startCluster);
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{
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EbmlLoc start;
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unsigned int i;
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glob->cue_pos = ftello(glob->stream);
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Ebml_StartSubElement(glob, &start_cues, Cues);
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glob->cue_pos = ftello(glob->stream);
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Ebml_StartSubElement(glob, &start, Cues);
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for (i = 0; i < glob->cues; i++) {
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struct cue_entry *cue = &glob->cue_list[i];
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EbmlLoc start;
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for (i = 0; i < glob->cues; i++) {
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struct cue_entry *cue = &glob->cue_list[i];
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Ebml_StartSubElement(glob, &start_cue_point, CuePoint);
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Ebml_SerializeUnsigned(glob, CueTime, cue->time);
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Ebml_StartSubElement(glob, &start, CuePoint);
|
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{
|
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EbmlLoc start;
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Ebml_StartSubElement(glob, &start_cue_tracks, CueTrackPositions);
|
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Ebml_SerializeUnsigned(glob, CueTrack, 1);
|
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Ebml_SerializeUnsigned64(glob, CueClusterPosition,
|
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cue->loc - glob->position_reference);
|
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Ebml_EndSubElement(glob, &start_cue_tracks);
|
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|
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Ebml_SerializeUnsigned(glob, CueTime, cue->time);
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|
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Ebml_StartSubElement(glob, &start, CueTrackPositions);
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Ebml_SerializeUnsigned(glob, CueTrack, 1);
|
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Ebml_SerializeUnsigned64(glob, CueClusterPosition,
|
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cue->loc - glob->position_reference);
|
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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);
|
||||
|
||||
|
|
|
|||
|
|
@ -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,
|
||||
|
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|||
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