4 * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
5 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
7 * This file is part of FFmpeg.
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.
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.
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
27 #include "libavutil/bswap.h"
28 #include "libavutil/internal.h"
29 #include "libavutil/mem.h"
31 #define READ_PIXELS(a, b, c) \
33 val = av_le2ne32(*src++); \
35 *b++ = (val >> 10) & 0x3FF; \
36 *c++ = (val >> 20) & 0x3FF; \
39 static void v210_planar_unpack_c(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width)
44 for( i = 0; i < width-5; i += 6 ){
52 static av_cold int decode_init(AVCodecContext *avctx)
54 V210DecContext *s = avctx->priv_data;
56 if (avctx->width & 1) {
57 av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
60 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
61 avctx->bits_per_raw_sample = 10;
63 avctx->coded_frame = avcodec_alloc_frame();
64 if (!avctx->coded_frame)
65 return AVERROR(ENOMEM);
67 s->unpack_frame = v210_planar_unpack_c;
75 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
78 V210DecContext *s = avctx->priv_data;
80 int h, w, stride, aligned_input;
81 AVFrame *pic = avctx->coded_frame;
82 const uint8_t *psrc = avpkt->data;
85 if (s->custom_stride )
86 stride = s->custom_stride;
88 int aligned_width = ((avctx->width + 47) / 48) * 48;
89 stride = aligned_width * 8 / 3;
92 if (avpkt->size < stride * avctx->height) {
93 if ((((avctx->width + 23) / 24) * 24 * 8) / 3 * avctx->height == avpkt->size) {
94 stride = avpkt->size / avctx->height;
95 if (!s->stride_warning_shown)
96 av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (64 byte) detected\n");
97 s->stride_warning_shown = 1;
99 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
104 aligned_input = !((uintptr_t)psrc & 0xf) && !(stride & 0xf);
105 if (aligned_input != s->aligned_input) {
106 s->aligned_input = aligned_input;
112 avctx->release_buffer(avctx, pic);
115 if (ff_get_buffer(avctx, pic) < 0)
118 y = (uint16_t*)pic->data[0];
119 u = (uint16_t*)pic->data[1];
120 v = (uint16_t*)pic->data[2];
121 pic->pict_type = AV_PICTURE_TYPE_I;
124 for (h = 0; h < avctx->height; h++) {
125 const uint32_t *src = (const uint32_t*)psrc;
128 w = (avctx->width / 6) * 6;
129 s->unpack_frame(src, y, u, v, w);
136 if (w < avctx->width - 1) {
137 READ_PIXELS(u, y, v);
139 val = av_le2ne32(*src++);
141 if (w < avctx->width - 3) {
142 *u++ = (val >> 10) & 0x3FF;
143 *y++ = (val >> 20) & 0x3FF;
145 val = av_le2ne32(*src++);
147 *y++ = (val >> 10) & 0x3FF;
152 y += pic->linesize[0] / 2 - avctx->width;
153 u += pic->linesize[1] / 2 - avctx->width / 2;
154 v += pic->linesize[2] / 2 - avctx->width / 2;
158 *(AVFrame*)data = *avctx->coded_frame;
163 static av_cold int decode_close(AVCodecContext *avctx)
165 AVFrame *pic = avctx->coded_frame;
167 avctx->release_buffer(avctx, pic);
168 av_freep(&avctx->coded_frame);
173 #define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
174 static const AVOption v210dec_options[] = {
175 {"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), FF_OPT_TYPE_INT,
176 {.i64 = 0}, INT_MIN, INT_MAX, V210DEC_FLAGS},
180 static const AVClass v210dec_class = {
182 av_default_item_name,
184 LIBAVUTIL_VERSION_INT,
187 AVCodec ff_v210_decoder = {
189 .type = AVMEDIA_TYPE_VIDEO,
190 .id = AV_CODEC_ID_V210,
191 .priv_data_size = sizeof(V210DecContext),
193 .close = decode_close,
194 .decode = decode_frame,
195 .capabilities = CODEC_CAP_DR1,
196 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
197 .priv_class = &v210dec_class,