diff options
Diffstat (limited to 'ffmpeg/libavcodec/rawdec.c')
| -rw-r--r-- | ffmpeg/libavcodec/rawdec.c | 348 |
1 files changed, 348 insertions, 0 deletions
diff --git a/ffmpeg/libavcodec/rawdec.c b/ffmpeg/libavcodec/rawdec.c new file mode 100644 index 0000000..00730dc --- /dev/null +++ b/ffmpeg/libavcodec/rawdec.c @@ -0,0 +1,348 @@ +/* + * Raw Video Decoder + * Copyright (c) 2001 Fabrice Bellard + * + * 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 + */ + +/** + * @file + * Raw Video Decoder + */ + +#include "avcodec.h" +#include "raw.h" +#include "libavutil/avassert.h" +#include "libavutil/buffer.h" +#include "libavutil/common.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/imgutils.h" +#include "libavutil/opt.h" + +typedef struct RawVideoContext { + AVClass *av_class; + AVBufferRef *palette; + int frame_size; /* size of the frame in bytes */ + int flip; + int is_2_4_bpp; // 2 or 4 bpp raw in avi/mov + int is_yuv2; + int tff; +} RawVideoContext; + +static const AVOption options[]={ +{"top", "top field first", offsetof(RawVideoContext, tff), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_VIDEO_PARAM}, +{NULL} +}; + +static const AVClass class = { + .class_name = "rawdec", + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + +static const PixelFormatTag pix_fmt_bps_avi[] = { + { AV_PIX_FMT_MONOWHITE, 1 }, + { AV_PIX_FMT_PAL8, 2 }, + { AV_PIX_FMT_PAL8, 4 }, + { AV_PIX_FMT_PAL8, 8 }, + { AV_PIX_FMT_RGB444LE, 12 }, + { AV_PIX_FMT_RGB555LE, 15 }, + { AV_PIX_FMT_RGB555LE, 16 }, + { AV_PIX_FMT_BGR24, 24 }, + { AV_PIX_FMT_BGRA, 32 }, + { AV_PIX_FMT_NONE, 0 }, +}; + +static const PixelFormatTag pix_fmt_bps_mov[] = { + { AV_PIX_FMT_MONOWHITE, 1 }, + { AV_PIX_FMT_PAL8, 2 }, + { AV_PIX_FMT_PAL8, 4 }, + { AV_PIX_FMT_PAL8, 8 }, + // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov + // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html + { AV_PIX_FMT_RGB555BE, 16 }, + { AV_PIX_FMT_RGB24, 24 }, + { AV_PIX_FMT_ARGB, 32 }, + { AV_PIX_FMT_MONOWHITE,33 }, + { AV_PIX_FMT_NONE, 0 }, +}; + +enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags, + unsigned int fourcc) +{ + while (tags->pix_fmt >= 0) { + if (tags->fourcc == fourcc) + return tags->pix_fmt; + tags++; + } + return AV_PIX_FMT_NONE; +} + +#if LIBAVCODEC_VERSION_MAJOR < 55 +enum AVPixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc) +{ + return avpriv_find_pix_fmt(tags, fourcc); +} +#endif + +static av_cold int raw_init_decoder(AVCodecContext *avctx) +{ + RawVideoContext *context = avctx->priv_data; + const AVPixFmtDescriptor *desc; + + if ( avctx->codec_tag == MKTAG('r','a','w',' ') + || avctx->codec_tag == MKTAG('N','O','1','6')) + avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_mov, + avctx->bits_per_coded_sample); + else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W')) + avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi, + avctx->bits_per_coded_sample); + else if (avctx->codec_tag) + avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag); + else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample) + avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi, + avctx->bits_per_coded_sample); + + desc = av_pix_fmt_desc_get(avctx->pix_fmt); + if (!desc) { + av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n"); + return AVERROR(EINVAL); + } + + if (desc->flags & (PIX_FMT_PAL | PIX_FMT_PSEUDOPAL)) { + context->palette = av_buffer_alloc(AVPALETTE_SIZE); + if (!context->palette) + return AVERROR(ENOMEM); + if (desc->flags & PIX_FMT_PSEUDOPAL) + avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt); + else + memset(context->palette->data, 0, AVPALETTE_SIZE); + } + + context->frame_size = avpicture_get_size(avctx->pix_fmt, avctx->width, + avctx->height); + if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) && + avctx->pix_fmt == AV_PIX_FMT_PAL8 && + (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) + context->is_2_4_bpp = 1; + + if ((avctx->extradata_size >= 9 && + !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) || + avctx->codec_tag == MKTAG('c','y','u','v') || + avctx->codec_tag == MKTAG(3, 0, 0, 0) || + avctx->codec_tag == MKTAG('W','R','A','W')) + context->flip = 1; + + if (avctx->codec_tag == AV_RL32("yuv2") && + avctx->pix_fmt == AV_PIX_FMT_YUYV422) + context->is_yuv2 = 1; + + return 0; +} + +static void flip(AVCodecContext *avctx, AVPicture *picture) +{ + picture->data[0] += picture->linesize[0] * (avctx->height - 1); + picture->linesize[0] *= -1; +} + +static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame, + AVPacket *avpkt) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt); + RawVideoContext *context = avctx->priv_data; + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + int linesize_align = 4; + int res, len; + int need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2; + + AVFrame *frame = data; + AVPicture *picture = data; + + frame->pict_type = AV_PICTURE_TYPE_I; + frame->key_frame = 1; + frame->reordered_opaque = avctx->reordered_opaque; + frame->pkt_pts = avctx->pkt->pts; + av_frame_set_pkt_pos (frame, avctx->pkt->pos); + av_frame_set_pkt_duration(frame, avctx->pkt->duration); + + if (context->tff >= 0) { + frame->interlaced_frame = 1; + frame->top_field_first = context->tff; + } + + if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0) + return res; + + if (need_copy) + frame->buf[0] = av_buffer_alloc(context->frame_size); + else + frame->buf[0] = av_buffer_ref(avpkt->buf); + if (!frame->buf[0]) + return AVERROR(ENOMEM); + + //2bpp and 4bpp raw in avi and mov (yes this is ugly ...) + if (context->is_2_4_bpp) { + int i; + uint8_t *dst = frame->buf[0]->data; + buf_size = context->frame_size - AVPALETTE_SIZE; + if (avctx->bits_per_coded_sample == 4) { + for (i = 0; 2 * i + 1 < buf_size && i<avpkt->size; i++) { + dst[2 * i + 0] = buf[i] >> 4; + dst[2 * i + 1] = buf[i] & 15; + } + linesize_align = 8; + } else { + av_assert0(avctx->bits_per_coded_sample == 2); + for (i = 0; 4 * i + 3 < buf_size && i<avpkt->size; i++) { + dst[4 * i + 0] = buf[i] >> 6; + dst[4 * i + 1] = buf[i] >> 4 & 3; + dst[4 * i + 2] = buf[i] >> 2 & 3; + dst[4 * i + 3] = buf[i] & 3; + } + linesize_align = 16; + } + buf = dst; + } else if (need_copy) { + memcpy(frame->buf[0]->data, buf, FFMIN(buf_size, context->frame_size)); + buf = frame->buf[0]->data; + } + + if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') || + avctx->codec_tag == MKTAG('A', 'V', 'u', 'p')) + buf += buf_size - context->frame_size; + + len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0); + if (buf_size < len) { + av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len); + return AVERROR(EINVAL); + } + + if ((res = avpicture_fill(picture, buf, avctx->pix_fmt, + avctx->width, avctx->height)) < 0) + return res; + + if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { + const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, + NULL); + + if (pal) { + av_buffer_unref(&context->palette); + context->palette = av_buffer_alloc(AVPALETTE_SIZE); + if (!context->palette) + return AVERROR(ENOMEM); + memcpy(context->palette->data, pal, AVPALETTE_SIZE); + frame->palette_has_changed = 1; + } + } + + if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 || + avctx->pix_fmt==AV_PIX_FMT_GRAY8 || + avctx->pix_fmt==AV_PIX_FMT_RGB555LE || + avctx->pix_fmt==AV_PIX_FMT_RGB555BE || + avctx->pix_fmt==AV_PIX_FMT_RGB565LE || + avctx->pix_fmt==AV_PIX_FMT_MONOWHITE || + avctx->pix_fmt==AV_PIX_FMT_PAL8) && + FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size) + frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align); + + if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') && + FFALIGN(frame->linesize[0], linesize_align) * avctx->height + + FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) { + int la0 = FFALIGN(frame->linesize[0], linesize_align); + frame->data[1] += (la0 - frame->linesize[0]) * avctx->height; + frame->linesize[0] = la0; + frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align); + } + + if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) || + (desc->flags & PIX_FMT_PSEUDOPAL)) { + frame->buf[1] = av_buffer_ref(context->palette); + if (!frame->buf[1]) + return AVERROR(ENOMEM); + frame->data[1] = frame->buf[1]->data; + } + + if (avctx->pix_fmt == AV_PIX_FMT_BGR24 && + ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size) + frame->linesize[0] = (frame->linesize[0] + 3) & ~3; + + if (context->flip) + flip(avctx, picture); + + if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') || + avctx->codec_tag == MKTAG('Y', 'V', '1', '6') || + avctx->codec_tag == MKTAG('Y', 'V', '2', '4') || + avctx->codec_tag == MKTAG('Y', 'V', 'U', '9')) + FFSWAP(uint8_t *, picture->data[1], picture->data[2]); + + if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) { + picture->data[1] = picture->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height; + picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4; + } + + if (avctx->codec_tag == AV_RL32("yuv2") && + avctx->pix_fmt == AV_PIX_FMT_YUYV422) { + int x, y; + uint8_t *line = picture->data[0]; + for (y = 0; y < avctx->height; y++) { + for (x = 0; x < avctx->width; x++) + line[2 * x + 1] ^= 0x80; + line += picture->linesize[0]; + } + } + if (avctx->codec_tag == AV_RL32("YVYU") && + avctx->pix_fmt == AV_PIX_FMT_YUYV422) { + int x, y; + uint8_t *line = picture->data[0]; + for(y = 0; y < avctx->height; y++) { + for(x = 0; x < avctx->width - 1; x += 2) + FFSWAP(uint8_t, line[2*x + 1], line[2*x + 3]); + line += picture->linesize[0]; + } + } + + if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */ + frame->interlaced_frame = 1; + if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB) + frame->top_field_first = 1; + } + + *got_frame = 1; + return buf_size; +} + +static av_cold int raw_close_decoder(AVCodecContext *avctx) +{ + RawVideoContext *context = avctx->priv_data; + + av_buffer_unref(&context->palette); + return 0; +} + +AVCodec ff_rawvideo_decoder = { + .name = "rawvideo", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_RAWVIDEO, + .priv_data_size = sizeof(RawVideoContext), + .init = raw_init_decoder, + .close = raw_close_decoder, + .decode = raw_decode, + .long_name = NULL_IF_CONFIG_SMALL("raw video"), + .priv_class = &class, +}; |