| /* |
| * 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 |
| * XMA2 audio parser |
| */ |
| |
| #include "parser.h" |
| |
| typedef struct XMAParserContext{ |
| int skip_packets; |
| } XMAParserContext; |
| |
| static int xma_parse(AVCodecParserContext *s1, AVCodecContext *avctx, |
| const uint8_t **poutbuf, int *poutbuf_size, |
| const uint8_t *buf, int buf_size) |
| { |
| XMAParserContext *s = s1->priv_data; |
| |
| if (buf_size % 2048 == 0) { |
| int duration = 0, packet, nb_packets = buf_size / 2048; |
| |
| for (packet = 0; packet < nb_packets; packet++) { |
| if (s->skip_packets == 0) { |
| duration += buf[packet * 2048] * 128; |
| s->skip_packets = buf[packet * 2048 + 3] + 1; |
| } |
| s->skip_packets--; |
| } |
| |
| s1->duration = duration; |
| s1->key_frame = !!duration; |
| } |
| |
| /* always return the full packet. this parser isn't doing any splitting or |
| combining, only packet analysis */ |
| *poutbuf = buf; |
| *poutbuf_size = buf_size; |
| return buf_size; |
| } |
| |
| AVCodecParser ff_xma_parser = { |
| .codec_ids = { AV_CODEC_ID_XMA2 }, |
| .priv_data_size = sizeof(XMAParserContext), |
| .parser_parse = xma_parse, |
| }; |