libavcodec/v210dec.c - third_party/ffmpeg - Git at Google

 /*
  * 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;

     pic->pict_type = AV_PICTURE_TYPE_I;
     pic->flags |= AV_FRAME_FLAG_KEY;

     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,
 };
	/*
	* 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;

	pic->pict_type = AV_PICTURE_TYPE_I;
	pic->flags \|= AV_FRAME_FLAG_KEY;

	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,
	};