350 lines
11 KiB
C
350 lines
11 KiB
C
/* SPDX-FileCopyrightText: 2011 Peter Schlaile
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup ffmpeg
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*
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* Compatibility macros to make every FFMPEG installation appear
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* like the most current installation (wrapping some functionality sometimes)
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* it also includes all FFMPEG header files at once, no need to do it
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* separately.
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*/
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#ifndef __FFMPEG_COMPAT_H__
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#define __FFMPEG_COMPAT_H__
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#include <libavcodec/avcodec.h>
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#include <libavformat/avformat.h>
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#include <libswscale/swscale.h>
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/* Check if our ffmpeg is new enough, avoids user complaints.
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* Minimum supported version is currently 3.2.0 which mean the following library versions:
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* libavutil > 55.30
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* libavcodec > 57.60
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* libavformat > 57.50
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*
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* We only check for one of these as they are usually updated in tandem.
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*/
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#if (LIBAVFORMAT_VERSION_MAJOR < 57) || \
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((LIBAVFORMAT_VERSION_MAJOR == 57) && (LIBAVFORMAT_VERSION_MINOR <= 50))
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# error "FFmpeg 3.2.0 or newer is needed, Upgrade your FFmpeg or disable it"
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#endif
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/* end sanity check */
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/* visual studio 2012 does not define inline for C */
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#ifdef _MSC_VER
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# define FFMPEG_INLINE static __inline
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#else
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# define FFMPEG_INLINE static inline
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#endif
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#if (LIBAVFORMAT_VERSION_MAJOR < 59)
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/* For versions older than ffmpeg 5.0, use the old channel layout variables.
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* We intend to only keep this workaround for around two releases (3.5, 3.6).
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* If it sticks around any longer, then we should consider refactoring this.
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*/
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# define FFMPEG_USE_OLD_CHANNEL_VARS
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#endif
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/* Threaded sws_scale_frame was added in ffmpeg 5.0 (swscale version 6.1). */
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#if (LIBSWSCALE_VERSION_INT >= AV_VERSION_INT(6, 1, 100))
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# define FFMPEG_SWSCALE_THREADING
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#endif
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/* AV_CODEC_CAP_AUTO_THREADS was renamed to AV_CODEC_CAP_OTHER_THREADS with
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* upstream commit
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* github.com/FFmpeg/FFmpeg/commit/7d09579190def3ef7562399489e628f3b65714ce
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* (lavc 58.132.100) and removed with commit
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* github.com/FFmpeg/FFmpeg/commit/10c9a0874cb361336237557391d306d26d43f137
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* for ffmpeg 6.0.
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*/
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#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(58, 132, 100)
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# define AV_CODEC_CAP_OTHER_THREADS AV_CODEC_CAP_AUTO_THREADS
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#endif
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#if (LIBAVFORMAT_VERSION_MAJOR < 58) || \
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((LIBAVFORMAT_VERSION_MAJOR == 58) && (LIBAVFORMAT_VERSION_MINOR < 76))
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# define FFMPEG_USE_DURATION_WORKAROUND 1
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/* Before ffmpeg 4.4, package duration calculation used depricated variables to calculate the
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* packet duration. Use the function from commit
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* github.com/FFmpeg/FFmpeg/commit/1c0885334dda9ee8652e60c586fa2e3674056586
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* to calculate the correct framerate for ffmpeg < 4.4.
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*/
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FFMPEG_INLINE
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void my_guess_pkt_duration(AVFormatContext *s, AVStream *st, AVPacket *pkt)
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{
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if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
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av_log(s,
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AV_LOG_WARNING,
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"Packet with invalid duration %" PRId64 " in stream %d\n",
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pkt->duration,
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pkt->stream_index);
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pkt->duration = 0;
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}
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if (pkt->duration) {
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return;
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}
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switch (st->codecpar->codec_type) {
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case AVMEDIA_TYPE_VIDEO:
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if (st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0) {
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pkt->duration = av_rescale_q(1, av_inv_q(st->avg_frame_rate), st->time_base);
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}
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else if (st->time_base.num * 1000LL > st->time_base.den) {
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pkt->duration = 1;
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}
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break;
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case AVMEDIA_TYPE_AUDIO: {
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int frame_size = av_get_audio_frame_duration2(st->codecpar, pkt->size);
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if (frame_size && st->codecpar->sample_rate) {
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pkt->duration = av_rescale_q(
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frame_size, (AVRational){1, st->codecpar->sample_rate}, st->time_base);
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}
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break;
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}
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default:
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break;
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}
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}
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#endif
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FFMPEG_INLINE
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int64_t timestamp_from_pts_or_dts(int64_t pts, int64_t dts)
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{
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/* Some videos do not have any pts values, use dts instead in those cases if
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* possible. Usually when this happens dts can act as pts because as all frames
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* should then be presented in their decoded in order. IE pts == dts. */
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if (pts == AV_NOPTS_VALUE) {
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return dts;
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}
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return pts;
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}
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FFMPEG_INLINE
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int64_t av_get_pts_from_frame(AVFrame *picture)
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{
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return timestamp_from_pts_or_dts(picture->pts, picture->pkt_dts);
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}
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/* Duration of the frame, in the same units as pts. 0 if unknown. */
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FFMPEG_INLINE
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int64_t av_get_frame_duration_in_pts_units(const AVFrame *picture)
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{
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#if LIBAVUTIL_VERSION_INT < AV_VERSION_INT(57, 30, 100)
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return picture->pkt_duration;
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#else
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return picture->duration;
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#endif
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}
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/* -------------------------------------------------------------------- */
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/** \name Deinterlace code block
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*
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* NOTE: The code in this block are from FFmpeg 2.6.4, which is licensed by LGPL.
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* \{ */
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#define MAX_NEG_CROP 1024
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#define times4(x) x, x, x, x
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#define times256(x) times4(times4(times4(times4(times4(x)))))
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static const uint8_t ff_compat_crop_tab[256 + 2 * MAX_NEG_CROP] = {
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times256(0x00), 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A,
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0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
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0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22,
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0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E,
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0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A,
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0x3B, 0x3C, 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46,
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0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52,
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0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E,
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0x5F, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
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0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76,
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0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, 0x80, 0x81, 0x82,
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0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E,
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0x8F, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A,
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0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6,
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0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2,
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0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE,
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0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA,
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0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6,
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0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1, 0xE2,
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0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE,
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0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA,
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0xFB, 0xFC, 0xFD, 0xFE, 0xFF, times256(0xFF)};
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#undef times4
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#undef times256
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/* filter parameters: [-1 4 2 4 -1] // 8 */
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FFMPEG_INLINE
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void deinterlace_line(uint8_t *dst,
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const uint8_t *lum_m4,
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const uint8_t *lum_m3,
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const uint8_t *lum_m2,
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const uint8_t *lum_m1,
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const uint8_t *lum,
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int size)
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{
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const uint8_t *cm = ff_compat_crop_tab + MAX_NEG_CROP;
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int sum;
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for (; size > 0; size--) {
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sum = -lum_m4[0];
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sum += lum_m3[0] << 2;
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sum += lum_m2[0] << 1;
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sum += lum_m1[0] << 2;
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sum += -lum[0];
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dst[0] = cm[(sum + 4) >> 3];
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lum_m4++;
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lum_m3++;
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lum_m2++;
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lum_m1++;
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lum++;
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dst++;
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}
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}
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FFMPEG_INLINE
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void deinterlace_line_inplace(
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uint8_t *lum_m4, uint8_t *lum_m3, uint8_t *lum_m2, uint8_t *lum_m1, uint8_t *lum, int size)
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{
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const uint8_t *cm = ff_compat_crop_tab + MAX_NEG_CROP;
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int sum;
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for (; size > 0; size--) {
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sum = -lum_m4[0];
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sum += lum_m3[0] << 2;
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sum += lum_m2[0] << 1;
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lum_m4[0] = lum_m2[0];
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sum += lum_m1[0] << 2;
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sum += -lum[0];
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lum_m2[0] = cm[(sum + 4) >> 3];
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lum_m4++;
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lum_m3++;
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lum_m2++;
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lum_m1++;
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lum++;
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}
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}
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/* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
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* top field is copied as is, but the bottom field is deinterlaced
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* against the top field. */
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FFMPEG_INLINE
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void deinterlace_bottom_field(
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uint8_t *dst, int dst_wrap, const uint8_t *src1, int src_wrap, int width, int height)
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{
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const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;
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int y;
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src_m2 = src1;
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src_m1 = src1;
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src_0 = &src_m1[src_wrap];
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src_p1 = &src_0[src_wrap];
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src_p2 = &src_p1[src_wrap];
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for (y = 0; y < (height - 2); y += 2) {
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memcpy(dst, src_m1, width);
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dst += dst_wrap;
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deinterlace_line(dst, src_m2, src_m1, src_0, src_p1, src_p2, width);
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src_m2 = src_0;
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src_m1 = src_p1;
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src_0 = src_p2;
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src_p1 += 2 * src_wrap;
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src_p2 += 2 * src_wrap;
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dst += dst_wrap;
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}
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memcpy(dst, src_m1, width);
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dst += dst_wrap;
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/* do last line */
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deinterlace_line(dst, src_m2, src_m1, src_0, src_0, src_0, width);
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}
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FFMPEG_INLINE
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int deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap, int width, int height)
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{
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uint8_t *src_m1, *src_0, *src_p1, *src_p2;
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int y;
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uint8_t *buf = (uint8_t *)av_malloc(width);
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if (!buf) {
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return AVERROR(ENOMEM);
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}
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src_m1 = src1;
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memcpy(buf, src_m1, width);
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src_0 = &src_m1[src_wrap];
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src_p1 = &src_0[src_wrap];
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src_p2 = &src_p1[src_wrap];
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for (y = 0; y < (height - 2); y += 2) {
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deinterlace_line_inplace(buf, src_m1, src_0, src_p1, src_p2, width);
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src_m1 = src_p1;
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src_0 = src_p2;
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src_p1 += 2 * src_wrap;
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src_p2 += 2 * src_wrap;
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}
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/* do last line */
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deinterlace_line_inplace(buf, src_m1, src_0, src_0, src_0, width);
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av_free(buf);
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return 0;
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}
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FFMPEG_INLINE
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int av_image_deinterlace(
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AVFrame *dst, const AVFrame *src, enum AVPixelFormat pix_fmt, int width, int height)
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{
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int i, ret;
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if (pix_fmt != AV_PIX_FMT_YUV420P && pix_fmt != AV_PIX_FMT_YUVJ420P &&
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pix_fmt != AV_PIX_FMT_YUV422P && pix_fmt != AV_PIX_FMT_YUVJ422P &&
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pix_fmt != AV_PIX_FMT_YUV444P && pix_fmt != AV_PIX_FMT_YUV411P &&
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pix_fmt != AV_PIX_FMT_GRAY8)
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{
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return -1;
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}
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if ((width & 3) != 0 || (height & 3) != 0) {
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return -1;
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}
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for (i = 0; i < 3; i++) {
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if (i == 1) {
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switch (pix_fmt) {
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case AV_PIX_FMT_YUVJ420P:
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case AV_PIX_FMT_YUV420P:
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width >>= 1;
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height >>= 1;
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break;
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case AV_PIX_FMT_YUV422P:
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case AV_PIX_FMT_YUVJ422P:
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width >>= 1;
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break;
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case AV_PIX_FMT_YUV411P:
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width >>= 2;
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break;
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default:
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break;
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}
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if (pix_fmt == AV_PIX_FMT_GRAY8) {
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break;
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}
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}
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if (src == dst) {
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ret = deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i], width, height);
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if (ret < 0) {
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return ret;
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}
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}
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else {
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deinterlace_bottom_field(
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dst->data[i], dst->linesize[i], src->data[i], src->linesize[i], width, height);
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}
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}
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return 0;
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}
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/** \} Deinterlace code block */
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#endif
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