| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * bitpacked encoder | ||
| 3 | * | ||
| 4 | * Copyright (c) 2021 Limin Wang | ||
| 5 | * | ||
| 6 | * This file is part of FFmpeg. | ||
| 7 | * | ||
| 8 | * FFmpeg is free software; you can redistribute it and/or | ||
| 9 | * modify it under the terms of the GNU Lesser General Public | ||
| 10 | * License as published by the Free Software Foundation; either | ||
| 11 | * version 2.1 of the License, or (at your option) any later version. | ||
| 12 | * | ||
| 13 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 16 | * Lesser General Public License for more details. | ||
| 17 | * | ||
| 18 | * You should have received a copy of the GNU Lesser General Public | ||
| 19 | * License along with FFmpeg; if not, write to the Free Software | ||
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 21 | */ | ||
| 22 | |||
| 23 | #include "avcodec.h" | ||
| 24 | #include "codec_internal.h" | ||
| 25 | #include "encode.h" | ||
| 26 | #include "internal.h" | ||
| 27 | #include "put_bits.h" | ||
| 28 | #include "libavutil/pixdesc.h" | ||
| 29 | |||
| 30 | struct BitpackedContext { | ||
| 31 | int (*encode)(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame); | ||
| 32 | }; | ||
| 33 | |||
| 34 | ✗ | static int encode_yuv422p10(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame) | |
| 35 | { | ||
| 36 | ✗ | const int buf_size = avctx->height * avctx->width * avctx->bits_per_coded_sample / 8; | |
| 37 | int ret; | ||
| 38 | uint8_t *dst; | ||
| 39 | const uint16_t *y; | ||
| 40 | const uint16_t *u; | ||
| 41 | const uint16_t *v; | ||
| 42 | PutBitContext pb; | ||
| 43 | |||
| 44 | ✗ | ret = ff_get_encode_buffer(avctx, pkt, buf_size, 0); | |
| 45 | ✗ | if (ret < 0) { | |
| 46 | ✗ | av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n"); | |
| 47 | ✗ | return ret; | |
| 48 | } | ||
| 49 | ✗ | dst = pkt->data; | |
| 50 | |||
| 51 | ✗ | init_put_bits(&pb, dst, buf_size); | |
| 52 | |||
| 53 | ✗ | for (int i = 0; i < avctx->height; i++) { | |
| 54 | ✗ | y = (uint16_t*)(frame->data[0] + i * frame->linesize[0]); | |
| 55 | ✗ | u = (uint16_t*)(frame->data[1] + i * frame->linesize[1]); | |
| 56 | ✗ | v = (uint16_t*)(frame->data[2] + i * frame->linesize[2]); | |
| 57 | |||
| 58 | ✗ | for (int j = 0; j < avctx->width; j += 2) { | |
| 59 | /* u, y0, v, y1 */ | ||
| 60 | ✗ | put_bits(&pb, 10, av_clip_uintp2(*u++, 10)); | |
| 61 | ✗ | put_bits(&pb, 10, av_clip_uintp2(*y++, 10)); | |
| 62 | ✗ | put_bits(&pb, 10, av_clip_uintp2(*v++, 10)); | |
| 63 | ✗ | put_bits(&pb, 10, av_clip_uintp2(*y++, 10)); | |
| 64 | } | ||
| 65 | } | ||
| 66 | ✗ | flush_put_bits(&pb); | |
| 67 | |||
| 68 | ✗ | return 0; | |
| 69 | } | ||
| 70 | |||
| 71 | |||
| 72 | ✗ | static av_cold int encode_init(AVCodecContext *avctx) | |
| 73 | { | ||
| 74 | ✗ | struct BitpackedContext *s = avctx->priv_data; | |
| 75 | ✗ | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt); | |
| 76 | |||
| 77 | ✗ | if (avctx->width & 1) { | |
| 78 | ✗ | av_log(avctx, AV_LOG_ERROR, "bitpacked needs even width\n"); | |
| 79 | ✗ | return AVERROR(EINVAL); | |
| 80 | } | ||
| 81 | |||
| 82 | ✗ | avctx->bits_per_coded_sample = av_get_bits_per_pixel(desc); | |
| 83 | ✗ | avctx->bit_rate = ff_guess_coded_bitrate(avctx); | |
| 84 | |||
| 85 | ✗ | if (avctx->pix_fmt == AV_PIX_FMT_YUV422P10) | |
| 86 | ✗ | s->encode = encode_yuv422p10; | |
| 87 | else | ||
| 88 | ✗ | return AVERROR(EINVAL); | |
| 89 | |||
| 90 | ✗ | return 0; | |
| 91 | } | ||
| 92 | |||
| 93 | ✗ | static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, | |
| 94 | const AVFrame *frame, int *got_packet) | ||
| 95 | { | ||
| 96 | ✗ | struct BitpackedContext *s = avctx->priv_data; | |
| 97 | int ret; | ||
| 98 | |||
| 99 | ✗ | ret = s->encode(avctx, pkt, frame); | |
| 100 | ✗ | if (ret) | |
| 101 | ✗ | return ret; | |
| 102 | |||
| 103 | ✗ | *got_packet = 1; | |
| 104 | ✗ | return 0; | |
| 105 | } | ||
| 106 | |||
| 107 | const FFCodec ff_bitpacked_encoder = { | ||
| 108 | .p.name = "bitpacked", | ||
| 109 | CODEC_LONG_NAME("Bitpacked"), | ||
| 110 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 111 | .p.id = AV_CODEC_ID_BITPACKED, | ||
| 112 | .priv_data_size = sizeof(struct BitpackedContext), | ||
| 113 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS | | ||
| 114 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE, | ||
| 115 | .init = encode_init, | ||
| 116 | FF_CODEC_ENCODE_CB(encode_frame), | ||
| 117 | .p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV422P10, | ||
| 118 | AV_PIX_FMT_NONE }, | ||
| 119 | }; | ||
| 120 |