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