| 1 | /* |
| 2 | * V210 decoder |
| 3 | * |
| 4 | * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at> |
| 5 | * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com> |
| 6 | * |
| 7 | * This file is part of FFmpeg. |
| 8 | * |
| 9 | * FFmpeg is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU Lesser General Public |
| 11 | * License as published by the Free Software Foundation; either |
| 12 | * version 2.1 of the License, or (at your option) any later version. |
| 13 | * |
| 14 | * FFmpeg is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * Lesser General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public |
| 20 | * License along with FFmpeg; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 22 | */ |
| 23 | |
| 24 | #include "avcodec.h" |
| 25 | #include "internal.h" |
| 26 | #include "v210dec.h" |
| 27 | #include "libavutil/bswap.h" |
| 28 | #include "libavutil/internal.h" |
| 29 | #include "libavutil/mem.h" |
| 30 | |
| 31 | #define READ_PIXELS(a, b, c) \ |
| 32 | do { \ |
| 33 | val = av_le2ne32(*src++); \ |
| 34 | *a++ = val & 0x3FF; \ |
| 35 | *b++ = (val >> 10) & 0x3FF; \ |
| 36 | *c++ = (val >> 20) & 0x3FF; \ |
| 37 | } while (0) |
| 38 | |
| 39 | static void v210_planar_unpack_c(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width) |
| 40 | { |
| 41 | uint32_t val; |
| 42 | int i; |
| 43 | |
| 44 | for( i = 0; i < width-5; i += 6 ){ |
| 45 | READ_PIXELS(u, y, v); |
| 46 | READ_PIXELS(y, u, y); |
| 47 | READ_PIXELS(v, y, u); |
| 48 | READ_PIXELS(y, v, y); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | static av_cold int decode_init(AVCodecContext *avctx) |
| 53 | { |
| 54 | V210DecContext *s = avctx->priv_data; |
| 55 | |
| 56 | if (avctx->width & 1) { |
| 57 | av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n"); |
| 58 | return AVERROR_INVALIDDATA; |
| 59 | } |
| 60 | avctx->pix_fmt = AV_PIX_FMT_YUV422P10; |
| 61 | avctx->bits_per_raw_sample = 10; |
| 62 | |
| 63 | s->unpack_frame = v210_planar_unpack_c; |
| 64 | |
| 65 | if (HAVE_MMX) |
| 66 | v210_x86_init(s); |
| 67 | |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
| 72 | AVPacket *avpkt) |
| 73 | { |
| 74 | V210DecContext *s = avctx->priv_data; |
| 75 | |
| 76 | int h, w, ret, stride, aligned_input; |
| 77 | AVFrame *pic = data; |
| 78 | const uint8_t *psrc = avpkt->data; |
| 79 | uint16_t *y, *u, *v; |
| 80 | |
| 81 | if (s->custom_stride ) |
| 82 | stride = s->custom_stride; |
| 83 | else { |
| 84 | int aligned_width = ((avctx->width + 47) / 48) * 48; |
| 85 | stride = aligned_width * 8 / 3; |
| 86 | } |
| 87 | |
| 88 | if (avpkt->size < stride * avctx->height) { |
| 89 | if ((((avctx->width + 23) / 24) * 24 * 8) / 3 * avctx->height == avpkt->size) { |
| 90 | stride = avpkt->size / avctx->height; |
| 91 | if (!s->stride_warning_shown) |
| 92 | av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (64 byte) detected\n"); |
| 93 | s->stride_warning_shown = 1; |
| 94 | } else { |
| 95 | av_log(avctx, AV_LOG_ERROR, "packet too small\n"); |
| 96 | return AVERROR_INVALIDDATA; |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | aligned_input = !((uintptr_t)psrc & 0xf) && !(stride & 0xf); |
| 101 | if (aligned_input != s->aligned_input) { |
| 102 | s->aligned_input = aligned_input; |
| 103 | if (HAVE_MMX) |
| 104 | v210_x86_init(s); |
| 105 | } |
| 106 | |
| 107 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
| 108 | return ret; |
| 109 | |
| 110 | y = (uint16_t*)pic->data[0]; |
| 111 | u = (uint16_t*)pic->data[1]; |
| 112 | v = (uint16_t*)pic->data[2]; |
| 113 | pic->pict_type = AV_PICTURE_TYPE_I; |
| 114 | pic->key_frame = 1; |
| 115 | |
| 116 | for (h = 0; h < avctx->height; h++) { |
| 117 | const uint32_t *src = (const uint32_t*)psrc; |
| 118 | uint32_t val; |
| 119 | |
| 120 | w = (avctx->width / 6) * 6; |
| 121 | s->unpack_frame(src, y, u, v, w); |
| 122 | |
| 123 | y += w; |
| 124 | u += w >> 1; |
| 125 | v += w >> 1; |
| 126 | src += (w << 1) / 3; |
| 127 | |
| 128 | if (w < avctx->width - 1) { |
| 129 | READ_PIXELS(u, y, v); |
| 130 | |
| 131 | val = av_le2ne32(*src++); |
| 132 | *y++ = val & 0x3FF; |
| 133 | if (w < avctx->width - 3) { |
| 134 | *u++ = (val >> 10) & 0x3FF; |
| 135 | *y++ = (val >> 20) & 0x3FF; |
| 136 | |
| 137 | val = av_le2ne32(*src++); |
| 138 | *v++ = val & 0x3FF; |
| 139 | *y++ = (val >> 10) & 0x3FF; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | psrc += stride; |
| 144 | y += pic->linesize[0] / 2 - avctx->width; |
| 145 | u += pic->linesize[1] / 2 - avctx->width / 2; |
| 146 | v += pic->linesize[2] / 2 - avctx->width / 2; |
| 147 | } |
| 148 | |
| 149 | if (avctx->field_order > AV_FIELD_PROGRESSIVE) { |
| 150 | /* we have interlaced material flagged in container */ |
| 151 | pic->interlaced_frame = 1; |
| 152 | if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB) |
| 153 | pic->top_field_first = 1; |
| 154 | } |
| 155 | |
| 156 | *got_frame = 1; |
| 157 | |
| 158 | return avpkt->size; |
| 159 | } |
| 160 | |
| 161 | #define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM |
| 162 | static const AVOption v210dec_options[] = { |
| 163 | {"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), FF_OPT_TYPE_INT, |
| 164 | {.i64 = 0}, INT_MIN, INT_MAX, V210DEC_FLAGS}, |
| 165 | {NULL} |
| 166 | }; |
| 167 | |
| 168 | static const AVClass v210dec_class = { |
| 169 | "V210 Decoder", |
| 170 | av_default_item_name, |
| 171 | v210dec_options, |
| 172 | LIBAVUTIL_VERSION_INT, |
| 173 | }; |
| 174 | |
| 175 | AVCodec ff_v210_decoder = { |
| 176 | .name = "v210", |
| 177 | .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"), |
| 178 | .type = AVMEDIA_TYPE_VIDEO, |
| 179 | .id = AV_CODEC_ID_V210, |
| 180 | .priv_data_size = sizeof(V210DecContext), |
| 181 | .init = decode_init, |
| 182 | .decode = decode_frame, |
| 183 | .capabilities = CODEC_CAP_DR1, |
| 184 | .priv_class = &v210dec_class, |
| 185 | }; |