mirror of https://github.com/FFmpeg/FFmpeg.git
courtesy of Aurelien Jacobs <aurel at gnuage dot org> Originally committed as revision 5028 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Mike Melanson
19 years ago
parent
220522479b
commit
2637670144
10 changed files with 417 additions and 5 deletions
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/*
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* AVS video decoder. |
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* Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org> |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "avcodec.h" |
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#include "bitstream.h" |
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typedef struct { |
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AVFrame picture; |
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} avs_context_t; |
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typedef enum { |
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AVS_VIDEO = 0x01, |
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AVS_AUDIO = 0x02, |
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AVS_PALETTE = 0x03, |
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AVS_GAME_DATA = 0x04, |
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} avs_block_type_t; |
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typedef enum { |
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AVS_I_FRAME = 0x00, |
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AVS_P_FRAME_3X3 = 0x01, |
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AVS_P_FRAME_2X2 = 0x02, |
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AVS_P_FRAME_2X3 = 0x03, |
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} avs_video_sub_type_t; |
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static int |
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avs_decode_frame(AVCodecContext * avctx, |
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void *data, int *data_size, uint8_t * buf, int buf_size) |
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{ |
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avs_context_t *const avs = avctx->priv_data; |
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AVFrame *picture = data; |
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AVFrame *const p = (AVFrame *) & avs->picture; |
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uint8_t *table, *vect, *out; |
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int i, j, x, y, stride, vect_w = 3, vect_h = 3; |
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int sub_type; |
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avs_block_type_t type; |
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GetBitContext change_map; |
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if (avctx->reget_buffer(avctx, p)) { |
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av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); |
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return -1; |
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} |
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p->reference = 1; |
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p->pict_type = FF_P_TYPE; |
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p->key_frame = 0; |
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out = avs->picture.data[0]; |
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stride = avs->picture.linesize[0]; |
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sub_type = buf[0]; |
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type = buf[1]; |
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buf += 4; |
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if (type == AVS_PALETTE) { |
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int first, last; |
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uint32_t *pal = (uint32_t *) avs->picture.data[1]; |
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first = LE_16(buf); |
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last = first + LE_16(buf + 2); |
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buf += 4; |
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for (i=first; i<last; i++, buf+=3) |
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pal[i] = (buf[0] << 18) | (buf[1] << 10) | (buf[2] << 2); |
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sub_type = buf[0]; |
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type = buf[1]; |
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buf += 4; |
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} |
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if (type != AVS_VIDEO) |
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return -1; |
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switch (sub_type) { |
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case AVS_I_FRAME: |
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p->pict_type = FF_I_TYPE; |
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p->key_frame = 1; |
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case AVS_P_FRAME_3X3: |
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vect_w = 3; |
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vect_h = 3; |
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break; |
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case AVS_P_FRAME_2X2: |
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vect_w = 2; |
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vect_h = 2; |
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break; |
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case AVS_P_FRAME_2X3: |
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vect_w = 2; |
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vect_h = 3; |
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break; |
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default: |
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return -1; |
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} |
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table = buf + (256 * vect_w * vect_h); |
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if (sub_type != AVS_I_FRAME) { |
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int map_size = ((318 / vect_w + 7) / 8) * (198 / vect_h); |
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init_get_bits(&change_map, table, map_size); |
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table += map_size; |
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} |
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for (y=0; y<198; y+=vect_h) { |
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for (x=0; x<318; x+=vect_w) { |
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if (sub_type == AVS_I_FRAME || get_bits1(&change_map)) { |
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vect = &buf[*table++ * (vect_w * vect_h)]; |
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for (j=0; j<vect_w; j++) { |
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out[(y + 0) * stride + x + j] = vect[(0 * vect_w) + j]; |
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out[(y + 1) * stride + x + j] = vect[(1 * vect_w) + j]; |
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if (vect_h == 3) |
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out[(y + 2) * stride + x + j] = |
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vect[(2 * vect_w) + j]; |
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} |
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} |
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} |
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if (sub_type != AVS_I_FRAME) |
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align_get_bits(&change_map); |
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} |
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*picture = *(AVFrame *) & avs->picture; |
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*data_size = sizeof(AVPicture); |
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return buf_size; |
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} |
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static int avs_decode_init(AVCodecContext * avctx) |
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{ |
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avctx->pix_fmt = PIX_FMT_PAL8; |
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return 0; |
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} |
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AVCodec avs_decoder = { |
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"avs", |
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CODEC_TYPE_VIDEO, |
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CODEC_ID_AVS, |
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sizeof(avs_context_t), |
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avs_decode_init, |
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NULL, |
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NULL, |
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avs_decode_frame, |
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CODEC_CAP_DR1, |
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}; |
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@ -0,0 +1,238 @@ |
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/*
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* AVS demuxer. |
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* Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org> |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "avformat.h" |
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#include "voc.h" |
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typedef struct avs_format { |
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voc_dec_context_t voc; |
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AVStream *st_video; |
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AVStream *st_audio; |
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int width; |
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int height; |
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int bits_per_sample; |
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int fps; |
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int nb_frames; |
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int remaining_frame_size; |
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int remaining_audio_size; |
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} avs_format_t; |
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typedef enum avs_block_type { |
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AVS_VIDEO = 0x01, |
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AVS_AUDIO = 0x02, |
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AVS_PALETTE = 0x03, |
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AVS_GAME_DATA = 0x04, |
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} avs_block_type_t; |
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#ifdef CONFIG_DEMUXERS |
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static int avs_probe(AVProbeData * p) |
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{ |
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const uint8_t *d; |
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if (p->buf_size < 2) |
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return 0; |
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d = p->buf; |
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if (d[0] == 'w' && d[1] == 'W' && d[2] == 0x10 && d[3] == 0) |
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return 50; |
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return 0; |
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} |
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static int avs_read_header(AVFormatContext * s, AVFormatParameters * ap) |
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{ |
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avs_format_t *avs = s->priv_data; |
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s->ctx_flags |= AVFMTCTX_NOHEADER; |
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url_fskip(&s->pb, 4); |
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avs->width = get_le16(&s->pb); |
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avs->height = get_le16(&s->pb); |
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avs->bits_per_sample = get_le16(&s->pb); |
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avs->fps = get_le16(&s->pb); |
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avs->nb_frames = get_le32(&s->pb); |
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avs->remaining_frame_size = 0; |
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avs->remaining_audio_size = 0; |
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avs->st_video = avs->st_audio = NULL; |
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if (avs->width != 318 || avs->height != 198) |
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av_log(s, AV_LOG_ERROR, "This avs pretend to be %dx%d " |
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"when the avs format is supposed to be 318x198 only.\n", |
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avs->width, avs->height); |
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return 0; |
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} |
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static int |
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avs_read_video_packet(AVFormatContext * s, AVPacket * pkt, |
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avs_block_type_t type, int sub_type, int size, |
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uint8_t * palette, int palette_size) |
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{ |
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avs_format_t *avs = s->priv_data; |
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int ret; |
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ret = av_new_packet(pkt, size + palette_size); |
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if (ret < 0) |
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return ret; |
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if (palette_size) { |
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pkt->data[0] = 0x00; |
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pkt->data[1] = 0x03; |
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pkt->data[2] = palette_size & 0xFF; |
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pkt->data[3] = (palette_size >> 8) & 0xFF; |
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memcpy(pkt->data + 4, palette, palette_size - 4); |
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} |
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pkt->data[palette_size + 0] = sub_type; |
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pkt->data[palette_size + 1] = type; |
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pkt->data[palette_size + 2] = size & 0xFF; |
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pkt->data[palette_size + 3] = (size >> 8) & 0xFF; |
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ret = get_buffer(&s->pb, pkt->data + palette_size + 4, size - 4) + 4; |
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if (ret < size) { |
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av_free_packet(pkt); |
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return AVERROR_IO; |
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} |
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pkt->size = ret + palette_size; |
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pkt->stream_index = avs->st_video->index; |
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if (sub_type == 0) |
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pkt->flags |= PKT_FLAG_KEY; |
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return 0; |
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} |
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static int avs_read_audio_packet(AVFormatContext * s, AVPacket * pkt) |
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{ |
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avs_format_t *avs = s->priv_data; |
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int ret, size; |
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size = url_ftell(&s->pb); |
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ret = voc_get_packet(s, pkt, avs->st_audio, avs->remaining_audio_size); |
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size = url_ftell(&s->pb) - size; |
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avs->remaining_audio_size -= size; |
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if (ret == AVERROR_IO) |
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return 0; /* this indicate EOS */ |
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if (ret < 0) |
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return ret; |
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pkt->stream_index = avs->st_audio->index; |
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pkt->flags |= PKT_FLAG_KEY; |
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return size; |
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} |
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static int avs_read_packet(AVFormatContext * s, AVPacket * pkt) |
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{ |
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avs_format_t *avs = s->priv_data; |
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int sub_type = 0, size = 0; |
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avs_block_type_t type = 0; |
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int palette_size = 0; |
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uint8_t palette[4 + 3 * 256]; |
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int ret; |
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if (avs->remaining_audio_size > 0) |
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if (avs_read_audio_packet(s, pkt) > 0) |
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return 0; |
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while (1) { |
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if (avs->remaining_frame_size <= 0) { |
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if (!get_le16(&s->pb)) /* found EOF */ |
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return AVERROR_IO; |
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avs->remaining_frame_size = get_le16(&s->pb) - 4; |
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} |
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while (avs->remaining_frame_size > 0) { |
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sub_type = get_byte(&s->pb); |
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type = get_byte(&s->pb); |
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size = get_le16(&s->pb); |
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avs->remaining_frame_size -= size; |
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switch (type) { |
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case AVS_PALETTE: |
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ret = get_buffer(&s->pb, palette, size - 4); |
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if (ret < size - 4) |
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return AVERROR_IO; |
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palette_size = size; |
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break; |
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case AVS_VIDEO: |
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if (!avs->st_video) { |
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avs->st_video = av_new_stream(s, AVS_VIDEO); |
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if (avs->st_video == NULL) |
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return AVERROR_NOMEM; |
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avs->st_video->codec->codec_type = CODEC_TYPE_VIDEO; |
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avs->st_video->codec->codec_id = CODEC_ID_AVS; |
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avs->st_video->codec->width = avs->width; |
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avs->st_video->codec->height = avs->height; |
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avs->st_video->codec->bits_per_sample=avs->bits_per_sample; |
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avs->st_video->nb_frames = avs->nb_frames; |
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avs->st_video->codec->time_base = (AVRational) { |
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1, avs->fps}; |
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} |
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return avs_read_video_packet(s, pkt, type, sub_type, size, |
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palette, palette_size); |
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case AVS_AUDIO: |
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if (!avs->st_audio) { |
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avs->st_audio = av_new_stream(s, AVS_AUDIO); |
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if (avs->st_audio == NULL) |
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return AVERROR_NOMEM; |
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avs->st_audio->codec->codec_type = CODEC_TYPE_AUDIO; |
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} |
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avs->remaining_audio_size = size - 4; |
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size = avs_read_audio_packet(s, pkt); |
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if (size != 0) |
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return size; |
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break; |
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default: |
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url_fskip(&s->pb, size - 4); |
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} |
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} |
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} |
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} |
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static int avs_read_close(AVFormatContext * s) |
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{ |
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return 0; |
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} |
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static AVInputFormat avs_iformat = { |
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"avs", |
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"avs format", |
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sizeof(avs_format_t), |
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avs_probe, |
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avs_read_header, |
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avs_read_packet, |
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avs_read_close, |
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}; |
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#endif /* CONFIG_DEMUXERS */ |
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int avs_init(void) |
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{ |
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#ifdef CONFIG_DEMUXERS |
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av_register_input_format(&avs_iformat); |
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#endif /* CONFIG_DEMUXERS */ |
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return 0; |
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} |
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