yading@10: /*
yading@10:  * Raw Video Decoder
yading@10:  * Copyright (c) 2001 Fabrice Bellard
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * Raw Video Decoder
yading@10:  */
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "raw.h"
yading@10: #include "libavutil/avassert.h"
yading@10: #include "libavutil/buffer.h"
yading@10: #include "libavutil/common.h"
yading@10: #include "libavutil/intreadwrite.h"
yading@10: #include "libavutil/imgutils.h"
yading@10: #include "libavutil/opt.h"
yading@10: 
yading@10: typedef struct RawVideoContext {
yading@10:     AVClass *av_class;
yading@10:     AVBufferRef *palette;
yading@10:     int frame_size;  /* size of the frame in bytes */
yading@10:     int flip;
yading@10:     int is_2_4_bpp; // 2 or 4 bpp raw in avi/mov
yading@10:     int is_yuv2;
yading@10:     int tff;
yading@10: } RawVideoContext;
yading@10: 
yading@10: static const AVOption options[]={
yading@10: {"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},
yading@10: {NULL}
yading@10: };
yading@10: 
yading@10: static const AVClass class = {
yading@10:     .class_name = "rawdec",
yading@10:     .option     = options,
yading@10:     .version    = LIBAVUTIL_VERSION_INT,
yading@10: };
yading@10: 
yading@10: static const PixelFormatTag pix_fmt_bps_avi[] = {
yading@10:     { AV_PIX_FMT_MONOWHITE, 1 },
yading@10:     { AV_PIX_FMT_PAL8,    2 },
yading@10:     { AV_PIX_FMT_PAL8,    4 },
yading@10:     { AV_PIX_FMT_PAL8,    8 },
yading@10:     { AV_PIX_FMT_RGB444LE, 12 },
yading@10:     { AV_PIX_FMT_RGB555LE, 15 },
yading@10:     { AV_PIX_FMT_RGB555LE, 16 },
yading@10:     { AV_PIX_FMT_BGR24,  24 },
yading@10:     { AV_PIX_FMT_BGRA,   32 },
yading@10:     { AV_PIX_FMT_NONE,    0 },
yading@10: };
yading@10: 
yading@10: static const PixelFormatTag pix_fmt_bps_mov[] = {
yading@10:     { AV_PIX_FMT_MONOWHITE, 1 },
yading@10:     { AV_PIX_FMT_PAL8,      2 },
yading@10:     { AV_PIX_FMT_PAL8,      4 },
yading@10:     { AV_PIX_FMT_PAL8,      8 },
yading@10:     // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
yading@10:     // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
yading@10:     { AV_PIX_FMT_RGB555BE, 16 },
yading@10:     { AV_PIX_FMT_RGB24,    24 },
yading@10:     { AV_PIX_FMT_ARGB,     32 },
yading@10:     { AV_PIX_FMT_MONOWHITE,33 },
yading@10:     { AV_PIX_FMT_NONE,      0 },
yading@10: };
yading@10: 
yading@10: enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags,
yading@10:                                        unsigned int fourcc)
yading@10: {
yading@10:     while (tags->pix_fmt >= 0) {
yading@10:         if (tags->fourcc == fourcc)
yading@10:             return tags->pix_fmt;
yading@10:         tags++;
yading@10:     }
yading@10:     return AV_PIX_FMT_NONE;
yading@10: }
yading@10: 
yading@10: #if LIBAVCODEC_VERSION_MAJOR < 55
yading@10: enum AVPixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
yading@10: {
yading@10:     return avpriv_find_pix_fmt(tags, fourcc);
yading@10: }
yading@10: #endif
yading@10: 
yading@10: static av_cold int raw_init_decoder(AVCodecContext *avctx)
yading@10: {
yading@10:     RawVideoContext *context = avctx->priv_data;
yading@10:     const AVPixFmtDescriptor *desc;
yading@10: 
yading@10:     if (   avctx->codec_tag == MKTAG('r','a','w',' ')
yading@10:         || avctx->codec_tag == MKTAG('N','O','1','6'))
yading@10:         avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_mov,
yading@10:                                       avctx->bits_per_coded_sample);
yading@10:     else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
yading@10:         avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi,
yading@10:                                       avctx->bits_per_coded_sample);
yading@10:     else if (avctx->codec_tag)
yading@10:         avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
yading@10:     else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
yading@10:         avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi,
yading@10:                                       avctx->bits_per_coded_sample);
yading@10: 
yading@10:     desc = av_pix_fmt_desc_get(avctx->pix_fmt);
yading@10:     if (!desc) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     if (desc->flags & (PIX_FMT_PAL | PIX_FMT_PSEUDOPAL)) {
yading@10:         context->palette = av_buffer_alloc(AVPALETTE_SIZE);
yading@10:         if (!context->palette)
yading@10:             return AVERROR(ENOMEM);
yading@10:         if (desc->flags & PIX_FMT_PSEUDOPAL)
yading@10:             avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt);
yading@10:         else
yading@10:             memset(context->palette->data, 0, AVPALETTE_SIZE);
yading@10:     }
yading@10: 
yading@10:     context->frame_size = avpicture_get_size(avctx->pix_fmt, avctx->width,
yading@10:                                              avctx->height);
yading@10:     if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
yading@10:         avctx->pix_fmt == AV_PIX_FMT_PAL8 &&
yading@10:        (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' ')))
yading@10:         context->is_2_4_bpp = 1;
yading@10: 
yading@10:     if ((avctx->extradata_size >= 9 &&
yading@10:          !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
yading@10:         avctx->codec_tag == MKTAG('c','y','u','v') ||
yading@10:         avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
yading@10:         avctx->codec_tag == MKTAG('W','R','A','W'))
yading@10:         context->flip = 1;
yading@10: 
yading@10:     if (avctx->codec_tag == AV_RL32("yuv2") &&
yading@10:         avctx->pix_fmt   == AV_PIX_FMT_YUYV422)
yading@10:         context->is_yuv2 = 1;
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static void flip(AVCodecContext *avctx, AVPicture *picture)
yading@10: {
yading@10:     picture->data[0]     += picture->linesize[0] * (avctx->height - 1);
yading@10:     picture->linesize[0] *= -1;
yading@10: }
yading@10: 
yading@10: static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
yading@10:                       AVPacket *avpkt)
yading@10: {
yading@10:     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
yading@10:     RawVideoContext *context       = avctx->priv_data;
yading@10:     const uint8_t *buf             = avpkt->data;
yading@10:     int buf_size                   = avpkt->size;
yading@10:     int linesize_align             = 4;
yading@10:     int res, len;
yading@10:     int need_copy                  = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2;
yading@10: 
yading@10:     AVFrame   *frame   = data;
yading@10:     AVPicture *picture = data;
yading@10: 
yading@10:     frame->pict_type        = AV_PICTURE_TYPE_I;
yading@10:     frame->key_frame        = 1;
yading@10:     frame->reordered_opaque = avctx->reordered_opaque;
yading@10:     frame->pkt_pts          = avctx->pkt->pts;
yading@10:     av_frame_set_pkt_pos     (frame, avctx->pkt->pos);
yading@10:     av_frame_set_pkt_duration(frame, avctx->pkt->duration);
yading@10: 
yading@10:     if (context->tff >= 0) {
yading@10:         frame->interlaced_frame = 1;
yading@10:         frame->top_field_first  = context->tff;
yading@10:     }
yading@10: 
yading@10:     if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
yading@10:         return res;
yading@10: 
yading@10:     if (need_copy)
yading@10:         frame->buf[0] = av_buffer_alloc(context->frame_size);
yading@10:     else
yading@10:         frame->buf[0] = av_buffer_ref(avpkt->buf);
yading@10:     if (!frame->buf[0])
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
yading@10:     if (context->is_2_4_bpp) {
yading@10:         int i;
yading@10:         uint8_t *dst = frame->buf[0]->data;
yading@10:         buf_size = context->frame_size - AVPALETTE_SIZE;
yading@10:         if (avctx->bits_per_coded_sample == 4) {
yading@10:             for (i = 0; 2 * i + 1 < buf_size && i<avpkt->size; i++) {
yading@10:                 dst[2 * i + 0] = buf[i] >> 4;
yading@10:                 dst[2 * i + 1] = buf[i] & 15;
yading@10:             }
yading@10:             linesize_align = 8;
yading@10:         } else {
yading@10:             av_assert0(avctx->bits_per_coded_sample == 2);
yading@10:             for (i = 0; 4 * i + 3 < buf_size && i<avpkt->size; i++) {
yading@10:                 dst[4 * i + 0] = buf[i] >> 6;
yading@10:                 dst[4 * i + 1] = buf[i] >> 4 & 3;
yading@10:                 dst[4 * i + 2] = buf[i] >> 2 & 3;
yading@10:                 dst[4 * i + 3] = buf[i]      & 3;
yading@10:             }
yading@10:             linesize_align = 16;
yading@10:         }
yading@10:         buf = dst;
yading@10:     } else if (need_copy) {
yading@10:         memcpy(frame->buf[0]->data, buf, FFMIN(buf_size, context->frame_size));
yading@10:         buf = frame->buf[0]->data;
yading@10:     }
yading@10: 
yading@10:     if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
yading@10:         avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
yading@10:         buf += buf_size - context->frame_size;
yading@10: 
yading@10:     len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
yading@10:     if (buf_size < len) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
yading@10:         av_buffer_unref(&frame->buf[0]);
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
yading@10:                               avctx->width, avctx->height)) < 0) {
yading@10:         av_buffer_unref(&frame->buf[0]);
yading@10:         return res;
yading@10:     }
yading@10: 
yading@10:     if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
yading@10:         const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
yading@10:                                                      NULL);
yading@10: 
yading@10:         if (pal) {
yading@10:             av_buffer_unref(&context->palette);
yading@10:             context->palette = av_buffer_alloc(AVPALETTE_SIZE);
yading@10:             if (!context->palette) {
yading@10:                 av_buffer_unref(&frame->buf[0]);
yading@10:                 return AVERROR(ENOMEM);
yading@10:             }
yading@10:             memcpy(context->palette->data, pal, AVPALETTE_SIZE);
yading@10:             frame->palette_has_changed = 1;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     if ((avctx->pix_fmt==AV_PIX_FMT_BGR24    ||
yading@10:         avctx->pix_fmt==AV_PIX_FMT_GRAY8    ||
yading@10:         avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
yading@10:         avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
yading@10:         avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
yading@10:         avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
yading@10:         avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
yading@10:         FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
yading@10:         frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
yading@10: 
yading@10:     if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
yading@10:         FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
yading@10:         FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
yading@10:         int la0 = FFALIGN(frame->linesize[0], linesize_align);
yading@10:         frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
yading@10:         frame->linesize[0] = la0;
yading@10:         frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
yading@10:     }
yading@10: 
yading@10:     if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
yading@10:         (desc->flags & PIX_FMT_PSEUDOPAL)) {
yading@10:         frame->buf[1]  = av_buffer_ref(context->palette);
yading@10:         if (!frame->buf[1]) {
yading@10:             av_buffer_unref(&frame->buf[0]);
yading@10:             return AVERROR(ENOMEM);
yading@10:         }
yading@10:         frame->data[1] = frame->buf[1]->data;
yading@10:     }
yading@10: 
yading@10:     if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
yading@10:         ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
yading@10:         frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
yading@10: 
yading@10:     if (context->flip)
yading@10:         flip(avctx, picture);
yading@10: 
yading@10:     if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
yading@10:         avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
yading@10:         avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
yading@10:         avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
yading@10:         FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
yading@10: 
yading@10:     if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
yading@10:         picture->data[1] = picture->data[1] +  (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
yading@10:         picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
yading@10:     }
yading@10: 
yading@10:     if (avctx->codec_tag == AV_RL32("yuv2") &&
yading@10:         avctx->pix_fmt   == AV_PIX_FMT_YUYV422) {
yading@10:         int x, y;
yading@10:         uint8_t *line = picture->data[0];
yading@10:         for (y = 0; y < avctx->height; y++) {
yading@10:             for (x = 0; x < avctx->width; x++)
yading@10:                 line[2 * x + 1] ^= 0x80;
yading@10:             line += picture->linesize[0];
yading@10:         }
yading@10:     }
yading@10:     if (avctx->codec_tag == AV_RL32("YVYU") &&
yading@10:         avctx->pix_fmt   == AV_PIX_FMT_YUYV422) {
yading@10:         int x, y;
yading@10:         uint8_t *line = picture->data[0];
yading@10:         for(y = 0; y < avctx->height; y++) {
yading@10:             for(x = 0; x < avctx->width - 1; x += 2)
yading@10:                 FFSWAP(uint8_t, line[2*x + 1], line[2*x + 3]);
yading@10:             line += picture->linesize[0];
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
yading@10:         frame->interlaced_frame = 1;
yading@10:         if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
yading@10:             frame->top_field_first = 1;
yading@10:     }
yading@10: 
yading@10:     *got_frame = 1;
yading@10:     return buf_size;
yading@10: }
yading@10: 
yading@10: static av_cold int raw_close_decoder(AVCodecContext *avctx)
yading@10: {
yading@10:     RawVideoContext *context = avctx->priv_data;
yading@10: 
yading@10:     av_buffer_unref(&context->palette);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: AVCodec ff_rawvideo_decoder = {
yading@10:     .name           = "rawvideo",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_RAWVIDEO,
yading@10:     .priv_data_size = sizeof(RawVideoContext),
yading@10:     .init           = raw_init_decoder,
yading@10:     .close          = raw_close_decoder,
yading@10:     .decode         = raw_decode,
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("raw video"),
yading@10:     .priv_class     = &class,
yading@10: };