| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Unpack bit-packed streams to formats supported by FFmpeg | ||
| 3 | * Copyright (c) 2017 Savoir-faire Linux, Inc | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | /* Development sponsored by CBC/Radio-Canada */ | ||
| 23 | |||
| 24 | /** | ||
| 25 | * @file | ||
| 26 | * Bitpacked | ||
| 27 | */ | ||
| 28 | |||
| 29 | #include "avcodec.h" | ||
| 30 | #include "codec_internal.h" | ||
| 31 | #include "get_bits.h" | ||
| 32 | #include "libavutil/imgutils.h" | ||
| 33 | #include "thread.h" | ||
| 34 | |||
| 35 | struct BitpackedContext { | ||
| 36 | int (*decode)(AVCodecContext *avctx, AVFrame *frame, | ||
| 37 | const AVPacket *pkt); | ||
| 38 | }; | ||
| 39 | |||
| 40 | /* For this format, it's a simple passthrough */ | ||
| 41 | ✗ | static int bitpacked_decode_uyvy422(AVCodecContext *avctx, AVFrame *frame, | |
| 42 | const AVPacket *avpkt) | ||
| 43 | { | ||
| 44 | int ret; | ||
| 45 | |||
| 46 | /* there is no need to copy as the data already match | ||
| 47 | * a known pixel format */ | ||
| 48 | ✗ | frame->buf[0] = av_buffer_ref(avpkt->buf); | |
| 49 | ✗ | if (!frame->buf[0]) { | |
| 50 | ✗ | return AVERROR(ENOMEM); | |
| 51 | } | ||
| 52 | |||
| 53 | ✗ | ret = av_image_fill_arrays(frame->data, frame->linesize, avpkt->data, | |
| 54 | avctx->pix_fmt, avctx->width, avctx->height, 1); | ||
| 55 | ✗ | if (ret < 0) { | |
| 56 | ✗ | av_buffer_unref(&frame->buf[0]); | |
| 57 | ✗ | return ret; | |
| 58 | } | ||
| 59 | |||
| 60 | ✗ | return 0; | |
| 61 | } | ||
| 62 | |||
| 63 | ✗ | static int bitpacked_decode_yuv422p10(AVCodecContext *avctx, AVFrame *frame, | |
| 64 | const AVPacket *avpkt) | ||
| 65 | { | ||
| 66 | ✗ | uint64_t frame_size = (uint64_t)avctx->width * (uint64_t)avctx->height * 20; | |
| 67 | ✗ | uint64_t packet_size = (uint64_t)avpkt->size * 8; | |
| 68 | GetBitContext bc; | ||
| 69 | uint16_t *y, *u, *v; | ||
| 70 | int ret, i, j; | ||
| 71 | |||
| 72 | ✗ | ret = ff_thread_get_buffer(avctx, frame, 0); | |
| 73 | ✗ | if (ret < 0) | |
| 74 | ✗ | return ret; | |
| 75 | |||
| 76 | ✗ | if (frame_size > packet_size) | |
| 77 | ✗ | return AVERROR_INVALIDDATA; | |
| 78 | |||
| 79 | ✗ | if (avctx->width % 2) | |
| 80 | ✗ | return AVERROR_PATCHWELCOME; | |
| 81 | |||
| 82 | ✗ | ret = init_get_bits(&bc, avpkt->data, avctx->width * avctx->height * 20); | |
| 83 | ✗ | if (ret) | |
| 84 | ✗ | return ret; | |
| 85 | |||
| 86 | ✗ | for (i = 0; i < avctx->height; i++) { | |
| 87 | ✗ | y = (uint16_t*)(frame->data[0] + i * frame->linesize[0]); | |
| 88 | ✗ | u = (uint16_t*)(frame->data[1] + i * frame->linesize[1]); | |
| 89 | ✗ | v = (uint16_t*)(frame->data[2] + i * frame->linesize[2]); | |
| 90 | |||
| 91 | ✗ | for (j = 0; j < avctx->width; j += 2) { | |
| 92 | ✗ | *u++ = get_bits(&bc, 10); | |
| 93 | ✗ | *y++ = get_bits(&bc, 10); | |
| 94 | ✗ | *v++ = get_bits(&bc, 10); | |
| 95 | ✗ | *y++ = get_bits(&bc, 10); | |
| 96 | } | ||
| 97 | } | ||
| 98 | |||
| 99 | ✗ | return 0; | |
| 100 | } | ||
| 101 | |||
| 102 | ✗ | static av_cold int bitpacked_init_decoder(AVCodecContext *avctx) | |
| 103 | { | ||
| 104 | ✗ | struct BitpackedContext *bc = avctx->priv_data; | |
| 105 | |||
| 106 | ✗ | if (!avctx->codec_tag || !avctx->width || !avctx->height) | |
| 107 | ✗ | return AVERROR_INVALIDDATA; | |
| 108 | |||
| 109 | ✗ | if (avctx->codec_tag == MKTAG('U', 'Y', 'V', 'Y')) { | |
| 110 | ✗ | if (avctx->bits_per_coded_sample == 16 && | |
| 111 | ✗ | avctx->pix_fmt == AV_PIX_FMT_UYVY422) | |
| 112 | ✗ | bc->decode = bitpacked_decode_uyvy422; | |
| 113 | ✗ | else if (avctx->bits_per_coded_sample == 20 && | |
| 114 | ✗ | avctx->pix_fmt == AV_PIX_FMT_YUV422P10) | |
| 115 | ✗ | bc->decode = bitpacked_decode_yuv422p10; | |
| 116 | else | ||
| 117 | ✗ | return AVERROR_INVALIDDATA; | |
| 118 | } else { | ||
| 119 | ✗ | return AVERROR_INVALIDDATA; | |
| 120 | } | ||
| 121 | |||
| 122 | ✗ | return 0; | |
| 123 | } | ||
| 124 | |||
| 125 | ✗ | static int bitpacked_decode(AVCodecContext *avctx, AVFrame *frame, | |
| 126 | int *got_frame, AVPacket *avpkt) | ||
| 127 | { | ||
| 128 | ✗ | struct BitpackedContext *bc = avctx->priv_data; | |
| 129 | ✗ | int buf_size = avpkt->size; | |
| 130 | int res; | ||
| 131 | |||
| 132 | ✗ | res = bc->decode(avctx, frame, avpkt); | |
| 133 | ✗ | if (res) | |
| 134 | ✗ | return res; | |
| 135 | |||
| 136 | ✗ | frame->pict_type = AV_PICTURE_TYPE_I; | |
| 137 | ✗ | frame->flags |= AV_FRAME_FLAG_KEY; | |
| 138 | |||
| 139 | ✗ | *got_frame = 1; | |
| 140 | ✗ | return buf_size; | |
| 141 | |||
| 142 | } | ||
| 143 | |||
| 144 | const FFCodec ff_bitpacked_decoder = { | ||
| 145 | .p.name = "bitpacked", | ||
| 146 | CODEC_LONG_NAME("Bitpacked"), | ||
| 147 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 148 | .p.id = AV_CODEC_ID_BITPACKED, | ||
| 149 | .p.capabilities = AV_CODEC_CAP_FRAME_THREADS, | ||
| 150 | .priv_data_size = sizeof(struct BitpackedContext), | ||
| 151 | .init = bitpacked_init_decoder, | ||
| 152 | FF_CODEC_DECODE_CB(bitpacked_decode), | ||
| 153 | .codec_tags = (const uint32_t []){ | ||
| 154 | MKTAG('U', 'Y', 'V', 'Y'), | ||
| 155 | FF_CODEC_TAGS_END, | ||
| 156 | }, | ||
| 157 | }; | ||
| 158 |