From ab959d7b4194715870128e616b8e29d4a101e488 Mon Sep 17 00:00:00 2001 From: etobi Date: Tue, 3 Sep 2013 09:48:41 +0200 Subject: Imported Upstream version 1.1.1+rev1207 --- lib/libucsi/mpeg/fmc_descriptor.h | 122 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 lib/libucsi/mpeg/fmc_descriptor.h (limited to 'lib/libucsi/mpeg/fmc_descriptor.h') diff --git a/lib/libucsi/mpeg/fmc_descriptor.h b/lib/libucsi/mpeg/fmc_descriptor.h new file mode 100644 index 0000000..5a5bed2 --- /dev/null +++ b/lib/libucsi/mpeg/fmc_descriptor.h @@ -0,0 +1,122 @@ +/* + * section and descriptor parser + * + * Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org) + * Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net) + * + * This library 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. + * + * This library 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA + */ + +#ifndef _UCSI_MPEG_FMC_DESCRIPTOR +#define _UCSI_MPEG_FMC_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include +#include + +/** + * mpeg_fmc_descriptor structure. + */ +struct mpeg_fmc_descriptor { + struct descriptor d; + + /* struct mpeg_flex_mux muxes[] */ +} __ucsi_packed; + +/** + * An entry in the muxes field of an mpeg_fmc_descriptor structure. + */ +struct mpeg_flex_mux { + uint16_t es_id; + uint8_t flex_mux_channel; +} __ucsi_packed; + +/** + * Process an mpeg_fmc_descriptor structure. + * + * @param d Generic descriptor structure. + * @return Pointer to an mpeg_fmc_descriptor structure, or NULL on error. + */ +static inline struct mpeg_fmc_descriptor* + mpeg_fmc_descriptor_codec(struct descriptor* d) +{ + uint8_t* buf = (uint8_t*) d + 2; + int pos = 0; + int len = d->len; + + if (len % sizeof(struct mpeg_flex_mux)) + return NULL; + + while(pos < len) { + bswap16(buf+pos); + pos += sizeof(struct mpeg_flex_mux); + } + + return (struct mpeg_fmc_descriptor*) d; +} + +/** + * Convenience iterator for the muxes field of an mpeg_fmc_descriptor structure. + * + * @param d Generic descriptor structure. + * @param pos Variable holding a pointer to the the current entry within the muxes field. + */ +#define mpeg_fmc_descriptor_muxes_for_each(d, pos) \ + for ((pos) = mpeg_fmc_descriptor_muxes_first(d); \ + (pos); \ + (pos) = mpeg_fmc_descriptor_muxes_next(d, pos)) + + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct mpeg_flex_mux* + mpeg_fmc_descriptor_muxes_first(struct mpeg_fmc_descriptor *d) +{ + if (d->d.len < sizeof(struct mpeg_flex_mux)) + return NULL; + + return (struct mpeg_flex_mux *) + ((uint8_t*) d + sizeof(struct mpeg_fmc_descriptor)); +} + +static inline struct mpeg_flex_mux* + mpeg_fmc_descriptor_muxes_next(struct mpeg_fmc_descriptor *d, + struct mpeg_flex_mux *pos) +{ + uint8_t *end = (uint8_t*) d + 2 + d->d.len; + uint8_t *next = (uint8_t *) pos + sizeof(struct mpeg_flex_mux); + + if (next >= end) + return NULL; + + return (struct mpeg_flex_mux *) next; +} + +#ifdef __cplusplus +} +#endif + +#endif -- cgit v1.2.3