diff options
Diffstat (limited to 'libavcodec/v210dec.c')
| -rw-r--r-- | libavcodec/v210dec.c | 127 |
1 files changed, 94 insertions, 33 deletions
diff --git a/libavcodec/v210dec.c b/libavcodec/v210dec.c index aa08436..103e136 100644 --- a/libavcodec/v210dec.c +++ b/libavcodec/v210dec.c @@ -4,30 +4,54 @@ * 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 Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * 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 "v210dec.h" #include "libavutil/bswap.h" #include "libavutil/internal.h" #include "libavutil/mem.h" +#define READ_PIXELS(a, b, c) \ + do { \ + val = av_le2ne32(*src++); \ + *a++ = val & 0x3FF; \ + *b++ = (val >> 10) & 0x3FF; \ + *c++ = (val >> 20) & 0x3FF; \ + } while (0) + +static void v210_planar_unpack_c(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width) +{ + uint32_t val; + int i; + + for( i = 0; i < width-5; i += 6 ){ + READ_PIXELS(u, y, v); + READ_PIXELS(y, u, y); + READ_PIXELS(v, y, u); + READ_PIXELS(y, v, y); + } +} + static av_cold int decode_init(AVCodecContext *avctx) { + V210DecContext *s = avctx->priv_data; + if (avctx->width & 1) { av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n"); return -1; @@ -39,27 +63,53 @@ static av_cold int decode_init(AVCodecContext *avctx) if (!avctx->coded_frame) return AVERROR(ENOMEM); + s->unpack_frame = v210_planar_unpack_c; + + if (HAVE_MMX) + v210_x86_init(s); + return 0; } static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt) { - int h, w; + V210DecContext *s = avctx->priv_data; + + int h, w, stride, aligned_input; AVFrame *pic = avctx->coded_frame; const uint8_t *psrc = avpkt->data; uint16_t *y, *u, *v; - int aligned_width = ((avctx->width + 47) / 48) * 48; - int stride = aligned_width * 8 / 3; - if (pic->data[0]) - avctx->release_buffer(avctx, pic); + if (s->custom_stride ) + stride = s->custom_stride; + else { + int aligned_width = ((avctx->width + 47) / 48) * 48; + stride = aligned_width * 8 / 3; + } if (avpkt->size < stride * avctx->height) { - av_log(avctx, AV_LOG_ERROR, "packet too small\n"); - return -1; + if ((((avctx->width + 23) / 24) * 24 * 8) / 3 * avctx->height == avpkt->size) { + stride = avpkt->size / avctx->height; + if (!s->stride_warning_shown) + av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (64 byte) detected\n"); + s->stride_warning_shown = 1; + } else { + av_log(avctx, AV_LOG_ERROR, "packet too small\n"); + return -1; + } + } + + aligned_input = !((uintptr_t)psrc & 0xf) && !(stride & 0xf); + if (aligned_input != s->aligned_input) { + s->aligned_input = aligned_input; + if (HAVE_MMX) + v210_x86_init(s); } + if (pic->data[0]) + avctx->release_buffer(avctx, pic); + pic->reference = 0; if (avctx->get_buffer(avctx, pic) < 0) return -1; @@ -70,36 +120,31 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, pic->pict_type = AV_PICTURE_TYPE_I; pic->key_frame = 1; -#define READ_PIXELS(a, b, c) \ - do { \ - val = av_le2ne32(*src++); \ - *a++ = val & 0x3FF; \ - *b++ = (val >> 10) & 0x3FF; \ - *c++ = (val >> 20) & 0x3FF; \ - } while (0) - for (h = 0; h < avctx->height; h++) { const uint32_t *src = (const uint32_t*)psrc; uint32_t val; - for (w = 0; w < avctx->width - 5; w += 6) { - READ_PIXELS(u, y, v); - READ_PIXELS(y, u, y); - READ_PIXELS(v, y, u); - READ_PIXELS(y, v, y); - } + + w = (avctx->width / 6) * 6; + s->unpack_frame(src, y, u, v, w); + + y += w; + u += w >> 1; + v += w >> 1; + src += (w << 1) / 3; + if (w < avctx->width - 1) { READ_PIXELS(u, y, v); val = av_le2ne32(*src++); *y++ = val & 0x3FF; - } - if (w < avctx->width - 3) { - *u++ = (val >> 10) & 0x3FF; - *y++ = (val >> 20) & 0x3FF; - - val = av_le2ne32(*src++); - *v++ = val & 0x3FF; - *y++ = (val >> 10) & 0x3FF; + if (w < avctx->width - 3) { + *u++ = (val >> 10) & 0x3FF; + *y++ = (val >> 20) & 0x3FF; + + val = av_le2ne32(*src++); + *v++ = val & 0x3FF; + *y++ = (val >> 10) & 0x3FF; + } } psrc += stride; @@ -124,13 +169,29 @@ static av_cold int decode_close(AVCodecContext *avctx) return 0; } +#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), FF_OPT_TYPE_INT, + {.dbl = 0}, INT_MIN, INT_MAX, V210DEC_FLAGS}, + {NULL} +}; + +static const AVClass v210dec_class = { + "V210 Decoder", + av_default_item_name, + v210dec_options, + LIBAVUTIL_VERSION_INT, +}; + AVCodec ff_v210_decoder = { .name = "v210", .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_V210, + .priv_data_size = sizeof(V210DecContext), .init = decode_init, .close = decode_close, .decode = decode_frame, .capabilities = CODEC_CAP_DR1, .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"), + .priv_class = &v210dec_class, }; |
