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 "codec_internal.h" 26#include "v210dec.h" 27#include "v210dec_init.h" 28#include "libavutil/bswap.h" 29#include "libavutil/imgutils.h" 30#include "libavutil/internal.h" 31#include "libavutil/intreadwrite.h" 32#include "thread.h" 33 34typedef struct ThreadData { 35 AVFrame *frame; 36 uint8_t *buf; 37 int stride; 38} ThreadData; 39 40static av_cold int decode_init(AVCodecContext *avctx) 41{ 42 V210DecContext *s = avctx->priv_data; 43 44 avctx->pix_fmt = AV_PIX_FMT_YUV422P10; 45 avctx->bits_per_raw_sample = 10; 46 47 s->thread_count = av_clip(avctx->thread_count, 1, avctx->height/4); 48 s->aligned_input = 0; 49 ff_v210dec_init(s); 50 51 return 0; 52} 53 54static void decode_row(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, const int width, 55 void (*unpack_frame)(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width)) 56{ 57 uint32_t val; 58 int w = (FFMAX(0, width - 12) / 12) * 12; 59 60 unpack_frame(src, y, u, v, w); 61 62 y += w; 63 u += w >> 1; 64 v += w >> 1; 65 src += (w << 1) / 3; 66 67 while (w < width - 5) { 68 READ_PIXELS(u, y, v); 69 READ_PIXELS(y, u, y); 70 READ_PIXELS(v, y, u); 71 READ_PIXELS(y, v, y); 72 w += 6; 73 } 74 75 if (w++ < width) { 76 READ_PIXELS(u, y, v); 77 78 if (w++ < width) { 79 val = av_le2ne32(*src++); 80 *y++ = val & 0x3FF; 81 82 if (w++ < width) { 83 *u++ = (val >> 10) & 0x3FF; 84 *y++ = (val >> 20) & 0x3FF; 85 val = av_le2ne32(*src++); 86 *v++ = val & 0x3FF; 87 88 if (w++ < width) { 89 *y++ = (val >> 10) & 0x3FF; 90 91 if (w++ < width) { 92 *u++ = (val >> 20) & 0x3FF; 93 val = av_le2ne32(*src++); 94 *y++ = val & 0x3FF; 95 *v++ = (val >> 10) & 0x3FF; 96 97 if (w++ < width) 98 *y++ = (val >> 20) & 0x3FF; 99 } 100 } 101 } 102 } 103 } 104} 105 106static int v210_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr) 107{ 108 V210DecContext *s = avctx->priv_data; 109 ThreadData *td = arg; 110 AVFrame *frame = td->frame; 111 int stride = td->stride; 112 int slice_start = (avctx->height * jobnr) / s->thread_count; 113 int slice_end = (avctx->height * (jobnr+1)) / s->thread_count; 114 uint8_t *psrc = td->buf + stride * slice_start; 115 int16_t *py = (uint16_t*)frame->data[0] + slice_start * frame->linesize[0] / 2; 116 int16_t *pu = (uint16_t*)frame->data[1] + slice_start * frame->linesize[1] / 2; 117 int16_t *pv = (uint16_t*)frame->data[2] + slice_start * frame->linesize[2] / 2; 118 119 for (int h = slice_start; h < slice_end; h++) { 120 decode_row((const uint32_t *)psrc, py, pu, pv, avctx->width, s->unpack_frame); 121 psrc += stride; 122 py += frame->linesize[0] / 2; 123 pu += frame->linesize[1] / 2; 124 pv += frame->linesize[2] / 2; 125 } 126 127 return 0; 128} 129 130static int v210_stride(int width, int align) { 131 int aligned_width = ((width + align - 1) / align) * align; 132 return aligned_width * 8 / 3; 133} 134 135static int decode_frame(AVCodecContext *avctx, AVFrame *pic, 136 int *got_frame, AVPacket *avpkt) 137{ 138 V210DecContext *s = avctx->priv_data; 139 ThreadData td; 140 int ret, stride, aligned_input; 141 const uint8_t *psrc = avpkt->data; 142 143 if (s->custom_stride ) 144 stride = s->custom_stride > 0 ? s->custom_stride : 0; 145 else { 146 stride = v210_stride(avctx->width, 48); 147 if (avpkt->size < stride * avctx->height) { 148 int align; 149 for (align = 24; align >= 6; align >>= 1) { 150 int small_stride = v210_stride(avctx->width, align); 151 if (avpkt->size == small_stride * avctx->height) { 152 stride = small_stride; 153 if (!s->stride_warning_shown) 154 av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (%d byte) detected\n", align * 8 / 3); 155 s->stride_warning_shown = 1; 156 break; 157 } 158 } 159 if (align < 6 && avctx->codec_tag == MKTAG('b', 'x', 'y', '2')) 160 stride = 0; 161 } 162 } 163 164 if (stride == 0 && ((avctx->width & 1) || (int64_t)avctx->width * avctx->height > INT_MAX / 6)) { 165 av_log(avctx, AV_LOG_ERROR, "Strideless v210 is not supported for size %dx%d\n", avctx->width, avctx->height); 166 return AVERROR_INVALIDDATA; 167 } 168 169 if (stride > 0 && avpkt->size < (int64_t)stride * avctx->height || 170 stride == 0 && avpkt->size < v210_stride(avctx->width * avctx->height, 6)) { 171 av_log(avctx, AV_LOG_ERROR, "packet too small\n"); 172 return AVERROR_INVALIDDATA; 173 } 174 if ( avctx->codec_tag == MKTAG('C', '2', '1', '0') 175 && avpkt->size > 64 176 && AV_RN32(psrc) == AV_RN32("INFO") 177 && avpkt->size - 64 >= stride * avctx->height) 178 psrc += 64; 179 180 aligned_input = !((uintptr_t)psrc & 0x1f) && !(stride & 0x1f); 181 if (aligned_input != s->aligned_input) { 182 s->aligned_input = aligned_input; 183 ff_v210dec_init(s); 184 } 185 186 if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0) 187 return ret; 188 189 pic->pict_type = AV_PICTURE_TYPE_I; 190 pic->key_frame = 1; 191 192 if (stride) { 193 td.stride = stride; 194 td.buf = (uint8_t*)psrc; 195 td.frame = pic; 196 avctx->execute2(avctx, v210_decode_slice, &td, NULL, s->thread_count); 197 } else { 198 uint8_t *pointers[4]; 199 int linesizes[4]; 200 int ret = av_image_alloc(pointers, linesizes, avctx->width, avctx->height, avctx->pix_fmt, 1); 201 if (ret < 0) 202 return ret; 203 decode_row((const uint32_t *)psrc, (uint16_t *)pointers[0], (uint16_t *)pointers[1], (uint16_t *)pointers[2], avctx->width * avctx->height, s->unpack_frame); 204 av_image_copy(pic->data, pic->linesize, (const uint8_t **)pointers, linesizes, avctx->pix_fmt, avctx->width, avctx->height); 205 av_freep(&pointers[0]); 206 } 207 208 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { 209 /* we have interlaced material flagged in container */ 210 pic->interlaced_frame = 1; 211 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB) 212 pic->top_field_first = 1; 213 } 214 215 *got_frame = 1; 216 217 return avpkt->size; 218} 219 220#define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM 221static const AVOption v210dec_options[] = { 222 {"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), AV_OPT_TYPE_INT, 223 {.i64 = 0}, -1, INT_MAX, V210DEC_FLAGS}, 224 {NULL} 225}; 226 227static const AVClass v210dec_class = { 228 .class_name = "V210 Decoder", 229 .item_name = av_default_item_name, 230 .option = v210dec_options, 231 .version = LIBAVUTIL_VERSION_INT, 232}; 233 234const FFCodec ff_v210_decoder = { 235 .p.name = "v210", 236 .p.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"), 237 .p.type = AVMEDIA_TYPE_VIDEO, 238 .p.id = AV_CODEC_ID_V210, 239 .priv_data_size = sizeof(V210DecContext), 240 .init = decode_init, 241 FF_CODEC_DECODE_CB(decode_frame), 242 .p.capabilities = AV_CODEC_CAP_DR1 | 243 AV_CODEC_CAP_SLICE_THREADS | 244 AV_CODEC_CAP_FRAME_THREADS, 245 .p.priv_class = &v210dec_class, 246 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, 247}; 248