X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fmsvideo1.c;h=a5fef4ddf7ba613f0e08d2d7d1a38d4a447e7fb1;hb=f907615f0813e8499f06a7eebccf1c63fce87c8e;hp=789d7e798b9dbf3698cc07047d5b27201e2cf102;hpb=e1c2a5a0a8e9f8a4e68a33f31d4a917771bbc1bb;p=ffmpeg diff --git a/libavcodec/msvideo1.c b/libavcodec/msvideo1.c index 789d7e798b9..a5fef4ddf7b 100644 --- a/libavcodec/msvideo1.c +++ b/libavcodec/msvideo1.c @@ -2,44 +2,39 @@ * Microsoft Video-1 Decoder * Copyright (C) 2003 the ffmpeg project * - * This library is free software; you can redistribute it and/or + * This file is part of Libav. + * + * Libav 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 of the License, or (at your option) any later version. + * version 2.1 of the License, or (at your option) any later version. * - * This library is distributed in the hope that it will be useful, + * Libav 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 this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** - * @file msvideo1.c + * @file * Microsoft Video-1 Decoder by Mike Melanson (melanson@pcisys.net) * For more information about the MS Video-1 format, visit: * http://www.pcisys.net/~melanson/codecs/ * - * This decoder outputs either PAL8 or RGB555 data, depending on the - * whether a RGB palette was passed through palctrl; - * if it's present, then the data is PAL8; RGB555 otherwise. */ #include #include #include -#include -#include "common.h" +#include "libavutil/intreadwrite.h" #include "avcodec.h" -#include "dsputil.h" #define PALETTE_COUNT 256 -#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0]) #define CHECK_STREAM_PTR(n) \ if ((stream_ptr + n) > s->size ) { \ av_log(s->avctx, AV_LOG_ERROR, " MS Video-1 warning: stream_ptr out of bounds (%d >= %d)\n", \ @@ -50,24 +45,24 @@ typedef struct Msvideo1Context { AVCodecContext *avctx; - DSPContext dsp; AVFrame frame; - unsigned char *buf; + const unsigned char *buf; int size; int mode_8bit; /* if it's not 8-bit, it's 16-bit */ + uint32_t pal[256]; } Msvideo1Context; -static int msvideo1_decode_init(AVCodecContext *avctx) +static av_cold int msvideo1_decode_init(AVCodecContext *avctx) { - Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data; + Msvideo1Context *s = avctx->priv_data; s->avctx = avctx; /* figure out the colorspace based on the presence of a palette */ - if (s->avctx->palctrl) { + if (s->avctx->bits_per_coded_sample == 8) { s->mode_8bit = 1; avctx->pix_fmt = PIX_FMT_PAL8; } else { @@ -75,9 +70,6 @@ static int msvideo1_decode_init(AVCodecContext *avctx) avctx->pix_fmt = PIX_FMT_RGB555; } - avctx->has_b_frames = 0; - dsputil_init(&s->dsp, avctx); - s->frame.data[0] = NULL; return 0; @@ -157,8 +149,8 @@ static void msvideo1_decode_8bit(Msvideo1Context *s) for (pixel_y = 0; pixel_y < 4; pixel_y++) { for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1) - pixels[pixel_ptr++] = - colors[((pixel_y & 0x2) << 1) + + pixels[pixel_ptr++] = + colors[((pixel_y & 0x2) << 1) + (pixel_x & 0x2) + ((flags & 0x1) ^ 1)]; pixel_ptr -= row_dec; } @@ -179,13 +171,8 @@ static void msvideo1_decode_8bit(Msvideo1Context *s) } /* make the palette available on the way out */ - if (s->avctx->pix_fmt == PIX_FMT_PAL8) { - memcpy(s->frame.data[1], s->avctx->palctrl->palette, AVPALETTE_SIZE); - if (s->avctx->palctrl->palette_changed) { - s->frame.palette_has_changed = 1; - s->avctx->palctrl->palette_changed = 0; - } - } + if (s->avctx->pix_fmt == PIX_FMT_PAL8) + memcpy(s->frame.data[1], s->pal, AVPALETTE_SIZE); } static void msvideo1_decode_16bit(Msvideo1Context *s) @@ -244,31 +231,31 @@ static void msvideo1_decode_16bit(Msvideo1Context *s) flags = (byte_b << 8) | byte_a; CHECK_STREAM_PTR(4); - colors[0] = LE_16(&s->buf[stream_ptr]); + colors[0] = AV_RL16(&s->buf[stream_ptr]); stream_ptr += 2; - colors[1] = LE_16(&s->buf[stream_ptr]); + colors[1] = AV_RL16(&s->buf[stream_ptr]); stream_ptr += 2; if (colors[0] & 0x8000) { /* 8-color encoding */ CHECK_STREAM_PTR(12); - colors[2] = LE_16(&s->buf[stream_ptr]); + colors[2] = AV_RL16(&s->buf[stream_ptr]); stream_ptr += 2; - colors[3] = LE_16(&s->buf[stream_ptr]); + colors[3] = AV_RL16(&s->buf[stream_ptr]); stream_ptr += 2; - colors[4] = LE_16(&s->buf[stream_ptr]); + colors[4] = AV_RL16(&s->buf[stream_ptr]); stream_ptr += 2; - colors[5] = LE_16(&s->buf[stream_ptr]); + colors[5] = AV_RL16(&s->buf[stream_ptr]); stream_ptr += 2; - colors[6] = LE_16(&s->buf[stream_ptr]); + colors[6] = AV_RL16(&s->buf[stream_ptr]); stream_ptr += 2; - colors[7] = LE_16(&s->buf[stream_ptr]); + colors[7] = AV_RL16(&s->buf[stream_ptr]); stream_ptr += 2; for (pixel_y = 0; pixel_y < 4; pixel_y++) { for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1) - pixels[pixel_ptr++] = - colors[((pixel_y & 0x2) << 1) + + pixels[pixel_ptr++] = + colors[((pixel_y & 0x2) << 1) + (pixel_x & 0x2) + ((flags & 0x1) ^ 1)]; pixel_ptr -= row_dec; } @@ -299,24 +286,31 @@ static void msvideo1_decode_16bit(Msvideo1Context *s) static int msvideo1_decode_frame(AVCodecContext *avctx, void *data, int *data_size, - uint8_t *buf, int buf_size) + AVPacket *avpkt) { - Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data; - - /* no supplementary picture */ - if (buf_size == 0) - return 0; + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + Msvideo1Context *s = avctx->priv_data; s->buf = buf; s->size = buf_size; - s->frame.reference = 1; - s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE; + s->frame.reference = 1; + s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE; if (avctx->reget_buffer(avctx, &s->frame)) { av_log(s->avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); return -1; } + if (s->mode_8bit) { + const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL); + + if (pal) { + memcpy(s->pal, pal, AVPALETTE_SIZE); + s->frame.palette_has_changed = 1; + } + } + if (s->mode_8bit) msvideo1_decode_8bit(s); else @@ -329,9 +323,9 @@ static int msvideo1_decode_frame(AVCodecContext *avctx, return buf_size; } -static int msvideo1_decode_end(AVCodecContext *avctx) +static av_cold int msvideo1_decode_end(AVCodecContext *avctx) { - Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data; + Msvideo1Context *s = avctx->priv_data; if (s->frame.data[0]) avctx->release_buffer(avctx, &s->frame); @@ -339,14 +333,14 @@ static int msvideo1_decode_end(AVCodecContext *avctx) return 0; } -AVCodec msvideo1_decoder = { - "msvideo1", - CODEC_TYPE_VIDEO, - CODEC_ID_MSVIDEO1, - sizeof(Msvideo1Context), - msvideo1_decode_init, - NULL, - msvideo1_decode_end, - msvideo1_decode_frame, - CODEC_CAP_DR1, +AVCodec ff_msvideo1_decoder = { + .name = "msvideo1", + .type = AVMEDIA_TYPE_VIDEO, + .id = CODEC_ID_MSVIDEO1, + .priv_data_size = sizeof(Msvideo1Context), + .init = msvideo1_decode_init, + .close = msvideo1_decode_end, + .decode = msvideo1_decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name= NULL_IF_CONFIG_SMALL("Microsoft Video 1"), };