diff options
Diffstat (limited to 'ffmpeg/linux-x86_64/include/libavutil/timecode.h')
| -rw-r--r-- | ffmpeg/linux-x86_64/include/libavutil/timecode.h | 67 |
1 files changed, 63 insertions, 4 deletions
diff --git a/ffmpeg/linux-x86_64/include/libavutil/timecode.h b/ffmpeg/linux-x86_64/include/libavutil/timecode.h index 37c1361..060574a 100644 --- a/ffmpeg/linux-x86_64/include/libavutil/timecode.h +++ b/ffmpeg/linux-x86_64/include/libavutil/timecode.h @@ -49,9 +49,9 @@ typedef struct { * Adjust frame number for NTSC drop frame time code. * * @param framenum frame number to adjust - * @param fps frame per second, 30 or 60 + * @param fps frame per second, multiples of 30 * @return adjusted frame number - * @warning adjustment is only valid in NTSC 29.97 and 59.94 + * @warning adjustment is only valid for multiples of NTSC 29.97 */ int av_timecode_adjust_ntsc_framenum2(int framenum, int fps); @@ -62,15 +62,40 @@ int av_timecode_adjust_ntsc_framenum2(int framenum, int fps); * @param framenum frame number * @return the SMPTE binary representation * + * See SMPTE ST 314M-2005 Sec 4.4.2.2.1 "Time code pack (TC)" + * the format description as follows: + * bits 0-5: hours, in BCD(6bits) + * bits 6: BGF1 + * bits 7: BGF2 (NTSC) or FIELD (PAL) + * bits 8-14: minutes, in BCD(7bits) + * bits 15: BGF0 (NTSC) or BGF2 (PAL) + * bits 16-22: seconds, in BCD(7bits) + * bits 23: FIELD (NTSC) or BGF0 (PAL) + * bits 24-29: frames, in BCD(6bits) + * bits 30: drop frame flag (0: non drop, 1: drop) + * bits 31: color frame flag (0: unsync mode, 1: sync mode) + * @note BCD numbers (6 or 7 bits): 4 or 5 lower bits for units, 2 higher bits for tens. * @note Frame number adjustment is automatically done in case of drop timecode, * you do NOT have to call av_timecode_adjust_ntsc_framenum2(). * @note The frame number is relative to tc->start. - * @note Color frame (CF), binary group flags (BGF) and biphase mark polarity - * correction (PC) bits are set to zero. + * @note Color frame (CF) and binary group flags (BGF) bits are set to zero. */ uint32_t av_timecode_get_smpte_from_framenum(const AVTimecode *tc, int framenum); /** + * Convert sei info to SMPTE 12M binary representation. + * + * @param rate frame rate in rational form + * @param drop drop flag + * @param hh hour + * @param mm minute + * @param ss second + * @param ff frame number + * @return the SMPTE binary representation + */ +uint32_t av_timecode_get_smpte(AVRational rate, int drop, int hh, int mm, int ss, int ff); + +/** * Load timecode string in buf. * * @param buf destination buffer, must be at least AV_TIMECODE_STR_SIZE long @@ -87,6 +112,23 @@ char *av_timecode_make_string(const AVTimecode *tc, char *buf, int framenum); /** * Get the timecode string from the SMPTE timecode format. * + * In contrast to av_timecode_make_smpte_tc_string this function supports 50/60 + * fps timecodes by using the field bit. + * + * @param buf destination buffer, must be at least AV_TIMECODE_STR_SIZE long + * @param rate frame rate of the timecode + * @param tcsmpte the 32-bit SMPTE timecode + * @param prevent_df prevent the use of a drop flag when it is known the DF bit + * is arbitrary + * @param skip_field prevent the use of a field flag when it is known the field + * bit is arbitrary (e.g. because it is used as PC flag) + * @return the buf parameter + */ +char *av_timecode_make_smpte_tc_string2(char *buf, AVRational rate, uint32_t tcsmpte, int prevent_df, int skip_field); + +/** + * Get the timecode string from the SMPTE timecode format. + * * @param buf destination buffer, must be at least AV_TIMECODE_STR_SIZE long * @param tcsmpte the 32-bit SMPTE timecode * @param prevent_df prevent the use of a drop flag when it is known the DF bit @@ -119,6 +161,23 @@ char *av_timecode_make_mpeg_tc_string(char *buf, uint32_t tc25bit); int av_timecode_init(AVTimecode *tc, AVRational rate, int flags, int frame_start, void *log_ctx); /** + * Init a timecode struct from the passed timecode components. + * + * @param log_ctx a pointer to an arbitrary struct of which the first field + * is a pointer to an AVClass struct (used for av_log) + * @param tc pointer to an allocated AVTimecode + * @param rate frame rate in rational form + * @param flags miscellaneous flags such as drop frame, +24 hours, ... + * (see AVTimecodeFlag) + * @param hh hours + * @param mm minutes + * @param ss seconds + * @param ff frames + * @return 0 on success, AVERROR otherwise + */ +int av_timecode_init_from_components(AVTimecode *tc, AVRational rate, int flags, int hh, int mm, int ss, int ff, void *log_ctx); + +/** * Parse timecode representation (hh:mm:ss[:;.]ff). * * @param log_ctx a pointer to an arbitrary struct of which the first field is a |