diff options
Diffstat (limited to 'libavcodec/mdec.c')
| -rw-r--r-- | libavcodec/mdec.c | 29 |
1 files changed, 14 insertions, 15 deletions
diff --git a/libavcodec/mdec.c b/libavcodec/mdec.c index 2a779c1..5fd06f4 100644 --- a/libavcodec/mdec.c +++ b/libavcodec/mdec.c @@ -4,20 +4,20 @@ * * based upon code from Sebastian Jedruszkiewicz <elf@frogger.rules.pl> * - * 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 */ @@ -29,6 +29,7 @@ #include "avcodec.h" #include "blockdsp.h" +#include "bswapdsp.h" #include "idctdsp.h" #include "mpegvideo.h" #include "mpeg12.h" @@ -37,6 +38,7 @@ typedef struct MDECContext { AVCodecContext *avctx; BlockDSPContext bdsp; + BswapDSPContext bbdsp; IDCTDSPContext idsp; ThreadFrame frame; GetBitContext gb; @@ -130,7 +132,7 @@ static inline int mdec_decode_block_intra(MDECContext *a, int16_t *block, int n) static inline int decode_mb(MDECContext *a, int16_t block[6][64]) { int i, ret; - const int block_index[6] = { 5, 4, 0, 1, 2, 3 }; + static const int block_index[6] = { 5, 4, 0, 1, 2, 3 }; a->bdsp.clear_blocks(block[0]); @@ -172,23 +174,19 @@ static int decode_frame(AVCodecContext *avctx, const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; ThreadFrame frame = { .f = data }; - int i, ret; + int ret; - if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) { - av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) return ret; - } frame.f->pict_type = AV_PICTURE_TYPE_I; frame.f->key_frame = 1; - av_fast_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE); + av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size, buf_size); if (!a->bitstream_buffer) return AVERROR(ENOMEM); - for (i = 0; i < buf_size; i += 2) { - a->bitstream_buffer[i] = buf[i + 1]; - a->bitstream_buffer[i + 1] = buf[i]; - } - init_get_bits(&a->gb, a->bitstream_buffer, buf_size * 8); + a->bbdsp.bswap16_buf((uint16_t *)a->bitstream_buffer, (uint16_t *)buf, (buf_size + 1) / 2); + if ((ret = init_get_bits8(&a->gb, a->bitstream_buffer, buf_size)) < 0) + return ret; /* skip over 4 preamble bytes in stream (typically 0xXX 0xXX 0x00 0x38) */ skip_bits(&a->gb, 32); @@ -222,6 +220,7 @@ static av_cold int decode_init(AVCodecContext *avctx) a->avctx = avctx; ff_blockdsp_init(&a->bdsp, avctx); + ff_bswapdsp_init(&a->bbdsp); ff_idctdsp_init(&a->idsp, avctx); ff_mpeg12_init_vlcs(); ff_init_scantable(a->idsp.idct_permutation, &a->scantable, |
