/src/ffmpeg/libavcodec/v210dec.c

Source
/*
 * V210 decoder
 *
 * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "avcodec.h"
#include "codec_internal.h"
#include "v210dec.h"
#include "v210dec_init.h"
#include "libavutil/bswap.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "thread.h"

typedef struct ThreadData {
    AVFrame *frame;
    const uint8_t *buf;
    int stride;
} ThreadData;

static av_cold int decode_init(AVCodecContext *avctx)
{
    V210DecContext *s = avctx->priv_data;

    avctx->pix_fmt             = AV_PIX_FMT_YUV422P10;
    avctx->bits_per_raw_sample = 10;

    s->thread_count  = av_clip(avctx->thread_count, 1, avctx->height/4);
    s->aligned_input = 0;
    ff_v210dec_init(s);

    return 0;
}

static void decode_row(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, const int width,
                       void (*unpack_frame)(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width))
{
    uint32_t val;
    int w = (FFMAX(0, width - 12) / 12) * 12;

    unpack_frame(src, y, u, v, w);

    y += w;
    u += w >> 1;
    v += w >> 1;
    src += (w << 1) / 3;

    while (w < width - 5) {
        READ_PIXELS(u, y, v);
        READ_PIXELS(y, u, y);
        READ_PIXELS(v, y, u);
        READ_PIXELS(y, v, y);
        w += 6;
    }

    if (w++ < width) {
        READ_PIXELS(u, y, v);

        if (w++ < width) {
            val  = av_le2ne32(*src++);
            *y++ =  val & 0x3FF;

            if (w++ < width) {
                *u++ = (val >> 10) & 0x3FF;
                *y++ = (val >> 20) & 0x3FF;
                val  = av_le2ne32(*src++);
                *v++ =  val & 0x3FF;

                if (w++ < width) {
                    *y++ = (val >> 10) & 0x3FF;

                    if (w++ < width) {
                        *u++ = (val >> 20) & 0x3FF;
                        val  = av_le2ne32(*src++);
                        *y++ =  val & 0x3FF;
                        *v++ = (val >> 10) & 0x3FF;

                        if (w++ < width)
                            *y++ = (val >> 20) & 0x3FF;
                    }
                }
            }
        }
    }
}

static int v210_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
{
    V210DecContext *s = avctx->priv_data;
    ThreadData *td = arg;
    AVFrame *frame = td->frame;
    int stride = td->stride;
    int slice_start = (avctx->height *  jobnr) / s->thread_count;
    int slice_end = (avctx->height * (jobnr+1)) / s->thread_count;
    const uint8_t *psrc = td->buf + stride * slice_start;
    int16_t *py = (uint16_t*)frame->data[0] + slice_start * frame->linesize[0] / 2;
    int16_t *pu = (uint16_t*)frame->data[1] + slice_start * frame->linesize[1] / 2;
    int16_t *pv = (uint16_t*)frame->data[2] + slice_start * frame->linesize[2] / 2;

    for (int h = slice_start; h < slice_end; h++) {
        decode_row((const uint32_t *)psrc, py, pu, pv, avctx->width, s->unpack_frame);
        psrc += stride;
        py += frame->linesize[0] / 2;
        pu += frame->linesize[1] / 2;
        pv += frame->linesize[2] / 2;
    }

    return 0;
}

static int v210_stride(int width, int align) {
    int aligned_width = ((width + align - 1) / align) * align;
    return aligned_width * 8 / 3;
}

static int decode_frame(AVCodecContext *avctx, AVFrame *pic,
                        int *got_frame, AVPacket *avpkt)
{
    V210DecContext *s = avctx->priv_data;
    ThreadData td;
    int ret, stride, aligned_input;
    const uint8_t *psrc = avpkt->data;

    if (s->custom_stride )
        stride = s->custom_stride > 0 ? s->custom_stride : 0;
    else {
        stride = v210_stride(avctx->width, 48);
        if (avpkt->size < stride * avctx->height) {
            int align;
            for (align = 24; align >= 6; align >>= 1) {
                int small_stride = v210_stride(avctx->width, align);
                if (avpkt->size == small_stride * avctx->height) {
                    stride = small_stride;
                    if (!s->stride_warning_shown)
                        av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (%d byte) detected\n", align * 8 / 3);
                    s->stride_warning_shown = 1;
                    break;
                }
            }
            if (align < 6 && avctx->codec_tag == MKTAG('b', 'x', 'y', '2'))
                stride = 0;
        }
    }

    if (stride == 0 && ((avctx->width & 1) || (int64_t)avctx->width * avctx->height > INT_MAX / 6)) {
        av_log(avctx, AV_LOG_ERROR, "Strideless v210 is not supported for size %dx%d\n", avctx->width, avctx->height);
        return AVERROR_INVALIDDATA;
    }

    if (stride  > 0 && avpkt->size < (int64_t)stride * avctx->height ||
        stride == 0 && avpkt->size < v210_stride(avctx->width * avctx->height, 6)) {
        av_log(avctx, AV_LOG_ERROR, "packet too small\n");
        return AVERROR_INVALIDDATA;
    }
    if (   avctx->codec_tag == MKTAG('C', '2', '1', '0')
        && avpkt->size > 64
        && AV_RN32(psrc) == AV_RN32("INFO")
        && avpkt->size - 64 >= stride * avctx->height)
        psrc += 64;

    aligned_input = !((uintptr_t)psrc & 0x1f) && !(stride & 0x1f);
    if (aligned_input != s->aligned_input) {
        s->aligned_input = aligned_input;
        ff_v210dec_init(s);
    }

    if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
        return ret;

    if (stride) {
        td.stride = stride;
        td.buf = psrc;
        td.frame = pic;
        avctx->execute2(avctx, v210_decode_slice, &td, NULL, s->thread_count);
    } else {
        uint8_t *pointers[4];
        int linesizes[4];
        int ret = av_image_alloc(pointers, linesizes, avctx->width, avctx->height, avctx->pix_fmt, 1);
        if (ret < 0)
            return ret;
        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);
        av_image_copy2(pic->data, pic->linesize, pointers, linesizes,
                       avctx->pix_fmt, avctx->width, avctx->height);
        av_freep(&pointers[0]);
    }

    if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
        /* we have interlaced material flagged in container */
        pic->flags |= AV_FRAME_FLAG_INTERLACED;
        if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
            pic->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
    }

    *got_frame      = 1;

    return avpkt->size;
}

#define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
static const AVOption v210dec_options[] = {
    {"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), AV_OPT_TYPE_INT,
     {.i64 = 0}, -1, INT_MAX, V210DEC_FLAGS},
    {NULL}
};

static const AVClass v210dec_class = {
    .class_name = "V210 Decoder",
    .item_name  = av_default_item_name,
    .option     = v210dec_options,
    .version    = LIBAVUTIL_VERSION_INT,
};

const FFCodec ff_v210_decoder = {
    .p.name         = "v210",
    CODEC_LONG_NAME("Uncompressed 4:2:2 10-bit"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_V210,
    .priv_data_size = sizeof(V210DecContext),
    .init           = decode_init,
    FF_CODEC_DECODE_CB(decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1 |
                      AV_CODEC_CAP_SLICE_THREADS |
                      AV_CODEC_CAP_FRAME_THREADS,
    .p.priv_class   = &v210dec_class,
};

Coverage Report

Created: 2026-09-14 08:00

Line	Count	Source
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 "libavutil/mem.h"
33		#include "thread.h"
34
35		typedef struct ThreadData {
36		AVFrame *frame;
37		const uint8_t *buf;
38		int stride;
39		} ThreadData;
40
41		static av_cold int decode_init(AVCodecContext *avctx)
42	967	{
43	967	V210DecContext *s = avctx->priv_data;
44
45	967	avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
46	967	avctx->bits_per_raw_sample = 10;
47
48	967	s->thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
49	967	s->aligned_input = 0;
50	967	ff_v210dec_init(s);
51
52	967	return 0;
53	967	}
54
55		static void decode_row(const uint32_t src, uint16_t y, uint16_t u, uint16_t v, const int width,
56		void (unpack_frame)(const uint32_t src, uint16_t y, uint16_t u, uint16_t *v, int width))
57	86.1k	{
58	86.1k	uint32_t val;
59	86.1k	int w = (FFMAX(0, width - 12) / 12) * 12;
60
61	86.1k	unpack_frame(src, y, u, v, w);
62
63	86.1k	y += w;
64	86.1k	u += w >> 1;
65	86.1k	v += w >> 1;
66	86.1k	src += (w << 1) / 3;
67
68	96.2k	while (w < width - 5) {
69	10.1k	READ_PIXELS(u, y, v);
70	10.1k	READ_PIXELS(y, u, y);
71	10.1k	READ_PIXELS(v, y, u);
72	10.1k	READ_PIXELS(y, v, y);
73	10.1k	w += 6;
74	10.1k	}
75
76	86.1k	if (w++ < width) {
77	79.5k	READ_PIXELS(u, y, v);
78
79	79.5k	if (w++ < width) {
80	76.6k	val = av_le2ne32(*src++);
81	76.6k	*y++ = val & 0x3FF;
82
83	76.6k	if (w++ < width) {
84	42.0k	*u++ = (val >> 10) & 0x3FF;
85	42.0k	*y++ = (val >> 20) & 0x3FF;
86	42.0k	val = av_le2ne32(*src++);
87	42.0k	*v++ = val & 0x3FF;
88
89	42.0k	if (w++ < width) {
90	38.6k	*y++ = (val >> 10) & 0x3FF;
91
92	38.6k	if (w++ < width) {
93	987	*u++ = (val >> 20) & 0x3FF;
94	987	val = av_le2ne32(*src++);
95	987	*y++ = val & 0x3FF;
96	987	*v++ = (val >> 10) & 0x3FF;
97
98	987	if (w++ < width)
99	0	*y++ = (val >> 20) & 0x3FF;
100	987	}
101	38.6k	}
102	42.0k	}
103	76.6k	}
104	79.5k	}
105	86.1k	}
106
107		static int v210_decode_slice(AVCodecContext avctx, void arg, int jobnr, int threadnr)
108	499	{
109	499	V210DecContext *s = avctx->priv_data;
110	499	ThreadData *td = arg;
111	499	AVFrame *frame = td->frame;
112	499	int stride = td->stride;
113	499	int slice_start = (avctx->height * jobnr) / s->thread_count;
114	499	int slice_end = (avctx->height * (jobnr+1)) / s->thread_count;
115	499	const uint8_t psrc = td->buf + stride slice_start;
116	499	int16_t py = (uint16_t)frame->data[0] + slice_start * frame->linesize[0] / 2;
117	499	int16_t pu = (uint16_t)frame->data[1] + slice_start * frame->linesize[1] / 2;
118	499	int16_t pv = (uint16_t)frame->data[2] + slice_start * frame->linesize[2] / 2;
119
120	47.0k	for (int h = slice_start; h < slice_end; h++) {
121	46.5k	decode_row((const uint32_t *)psrc, py, pu, pv, avctx->width, s->unpack_frame);
122	46.5k	psrc += stride;
123	46.5k	py += frame->linesize[0] / 2;
124	46.5k	pu += frame->linesize[1] / 2;
125	46.5k	pv += frame->linesize[2] / 2;
126	46.5k	}
127
128	499	return 0;
129	499	}
130
131	2.38M	static int v210_stride(int width, int align) {
132	2.38M	int aligned_width = ((width + align - 1) / align) * align;
133	2.38M	return aligned_width * 8 / 3;
134	2.38M	}
135
136		static int decode_frame(AVCodecContext avctx, AVFrame pic,
137		int got_frame, AVPacket avpkt)
138	593k	{
139	593k	V210DecContext *s = avctx->priv_data;
140	593k	ThreadData td;
141	593k	int ret, stride, aligned_input;
142	593k	const uint8_t *psrc = avpkt->data;
143
144	593k	if (s->custom_stride )
145	0	stride = s->custom_stride > 0 ? s->custom_stride : 0;
146	593k	else {
147	593k	stride = v210_stride(avctx->width, 48);
148	593k	if (avpkt->size < stride * avctx->height) {
149	575k	int align;
150	2.23M	for (align = 24; align >= 6; align >>= 1) {
151	1.72M	int small_stride = v210_stride(avctx->width, align);
152	1.72M	if (avpkt->size == small_stride * avctx->height) {
153	65.9k	stride = small_stride;
154	65.9k	if (!s->stride_warning_shown)
155	127	av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (%d byte) detected\n", align * 8 / 3);
156	65.9k	s->stride_warning_shown = 1;
157	65.9k	break;
158	65.9k	}
159	1.72M	}
160	575k	if (align < 6 && avctx->codec_tag == MKTAG('b', 'x', 'y', '2'))
161	52.5k	stride = 0;
162	575k	}
163	593k	}
164
165	593k	if (stride == 0 && ((avctx->width & 1) \|\| (int64_t)avctx->width * avctx->height > INT_MAX / 6)) {
166	349	av_log(avctx, AV_LOG_ERROR, "Strideless v210 is not supported for size %dx%d\n", avctx->width, avctx->height);
167	349	return AVERROR_INVALIDDATA;
168	349	}
169
170	593k	if (stride > 0 && avpkt->size < (int64_t)stride * avctx->height \|\|
171	469k	stride == 0 && avpkt->size < v210_stride(avctx->width * avctx->height, 6)) {
172	469k	av_log(avctx, AV_LOG_ERROR, "packet too small\n");
173	469k	return AVERROR_INVALIDDATA;
174	469k	}
175	124k	if ( avctx->codec_tag == MKTAG('C', '2', '1', '0')
176	4.61k	&& avpkt->size > 64
177	124k	&& AV_RN32(psrc) == AV_RN32("INFO")
178	633	&& avpkt->size - 64 >= stride * avctx->height)
179	294	psrc += 64;
180
181	124k	aligned_input = !((uintptr_t)psrc & 0x1f) && !(stride & 0x1f);
182	124k	if (aligned_input != s->aligned_input) {
183	8.57k	s->aligned_input = aligned_input;
184	8.57k	ff_v210dec_init(s);
185	8.57k	}
186
187	124k	if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
188	18.2k	return ret;
189
190	106k	if (stride) {
191	66.6k	td.stride = stride;
192	66.6k	td.buf = psrc;
193	66.6k	td.frame = pic;
194	66.6k	avctx->execute2(avctx, v210_decode_slice, &td, NULL, s->thread_count);
195	66.6k	} else {
196	39.5k	uint8_t *pointers[4];
197	39.5k	int linesizes[4];
198	39.5k	int ret = av_image_alloc(pointers, linesizes, avctx->width, avctx->height, avctx->pix_fmt, 1);
199	39.5k	if (ret < 0)
200	0	return ret;
201	39.5k	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);
202	39.5k	av_image_copy2(pic->data, pic->linesize, pointers, linesizes,
203	39.5k	avctx->pix_fmt, avctx->width, avctx->height);
204	39.5k	av_freep(&pointers[0]);
205	39.5k	}
206
207	106k	if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
208		/* we have interlaced material flagged in container */
209	0	pic->flags \|= AV_FRAME_FLAG_INTERLACED;
210	0	if (avctx->field_order == AV_FIELD_TT \|\| avctx->field_order == AV_FIELD_TB)
211	0	pic->flags \|= AV_FRAME_FLAG_TOP_FIELD_FIRST;
212	0	}
213
214	106k	*got_frame = 1;
215
216	106k	return avpkt->size;
217	106k	}
218
219		#define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM \| AV_OPT_FLAG_VIDEO_PARAM
220		static const AVOption v210dec_options[] = {
221		{"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), AV_OPT_TYPE_INT,
222		{.i64 = 0}, -1, INT_MAX, V210DEC_FLAGS},
223		{NULL}
224		};
225
226		static const AVClass v210dec_class = {
227		.class_name = "V210 Decoder",
228		.item_name = av_default_item_name,
229		.option = v210dec_options,
230		.version = LIBAVUTIL_VERSION_INT,
231		};
232
233		const FFCodec ff_v210_decoder = {
234		.p.name = "v210",
235		CODEC_LONG_NAME("Uncompressed 4:2:2 10-bit"),
236		.p.type = AVMEDIA_TYPE_VIDEO,
237		.p.id = AV_CODEC_ID_V210,
238		.priv_data_size = sizeof(V210DecContext),
239		.init = decode_init,
240		FF_CODEC_DECODE_CB(decode_frame),
241		.p.capabilities = AV_CODEC_CAP_DR1 \|
242		AV_CODEC_CAP_SLICE_THREADS \|
243		AV_CODEC_CAP_FRAME_THREADS,
244		.p.priv_class = &v210dec_class,
245		};