| /* $Id$ */ |
| /* |
| * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #ifndef __PJMEDIA_AVI_H__ |
| #define __PJMEDIA_AVI_H__ |
| |
| |
| /** |
| * @file avi.h |
| * @brief AVI file manipulation. |
| */ |
| |
| /** |
| * @defgroup PJMEDIA_FILE_FORMAT File Formats |
| * @brief Supported file formats |
| */ |
| |
| |
| /** |
| * @defgroup PJMEDIA_AVI AVI Header |
| * @ingroup PJMEDIA_FILE_FORMAT |
| * @brief Representation of RIFF/AVI file format |
| * @{ |
| * |
| * This the the low level representation of RIFF/AVI file format. For |
| * higher abstraction, please see \ref PJMEDIA_FILE_PLAY and |
| * \ref PJMEDIA_FILE_REC. |
| */ |
| |
| |
| PJ_BEGIN_DECL |
| |
| #define PJMEDIA_AVI_MAX_NUM_STREAMS 4 |
| |
| static const char avi_tags[][4] = { |
| { 'R', 'I', 'F', 'F' }, { 'A', 'V', 'I', ' ' }, |
| { 'h', 'd', 'r', 'l' }, { 'a', 'v', 'i', 'h' }, |
| { 's', 't', 'r', 'l' }, { 's', 't', 'r', 'h' }, |
| { 'a', 'u', 'd', 's' }, { 'v', 'i', 'd', 's' }, |
| { 's', 't', 'r', 'f' }, { 'm', 'o', 'v', 'i' }, |
| { 'L', 'I', 'S', 'T' }, { 'J', 'U', 'N', 'K' }, |
| }; |
| |
| typedef enum { |
| PJMEDIA_AVI_RIFF_TAG = 0, |
| PJMEDIA_AVI_AVI_TAG, |
| PJMEDIA_AVI_HDRL_TAG, |
| PJMEDIA_AVI_AVIH_TAG, |
| PJMEDIA_AVI_STRL_TAG, |
| PJMEDIA_AVI_STRH_TAG, |
| PJMEDIA_AVI_AUDS_TAG, |
| PJMEDIA_AVI_VIDS_TAG, |
| PJMEDIA_AVI_STRF_TAG, |
| PJMEDIA_AVI_MOVI_TAG, |
| PJMEDIA_AVI_LIST_TAG, |
| PJMEDIA_AVI_JUNK_TAG, |
| } pjmedia_avi_tag; |
| |
| |
| /** |
| * These types describe the simpler/canonical version of an AVI file. |
| * They do not support the full AVI RIFF format specification. |
| */ |
| #pragma pack(2) |
| |
| /** This structure describes RIFF AVI file header */ |
| typedef struct riff_hdr_t { |
| pj_uint32_t riff; /**< "RIFF" ASCII tag. */ |
| pj_uint32_t file_len; /**< File length minus 8 bytes */ |
| pj_uint32_t avi; /**< "AVI" ASCII tag. */ |
| } riff_hdr_t; |
| |
| /** This structure describes avih header */ |
| typedef struct avih_hdr_t { |
| pj_uint32_t list_tag; |
| pj_uint32_t list_sz; |
| pj_uint32_t hdrl_tag; |
| pj_uint32_t avih; |
| pj_uint32_t size; |
| pj_uint32_t usec_per_frame; /**< microsecs between frames */ |
| pj_uint32_t max_Bps; |
| pj_uint32_t pad; |
| pj_uint32_t flags; |
| pj_uint32_t tot_frames; |
| pj_uint32_t init_frames; |
| pj_uint32_t num_streams; |
| pj_uint32_t buf_size; |
| pj_uint32_t width; |
| pj_uint32_t height; |
| pj_uint32_t reserved[4]; |
| } avih_hdr_t; |
| |
| /** This structure describes strl header */ |
| typedef struct strl_hdr_t { |
| pj_uint32_t list_tag; |
| pj_uint32_t list_sz; |
| pj_uint32_t strl_tag; |
| |
| pj_uint32_t strh; |
| pj_uint32_t strh_size; |
| pj_uint32_t data_type; |
| pj_uint32_t codec; |
| pj_uint32_t flags; |
| pj_uint32_t bogus_priority_language; /**< Do not access this data */ |
| pj_uint32_t init_frames; |
| pj_uint32_t scale; |
| pj_uint32_t rate; |
| pj_uint32_t start; |
| pj_uint32_t length; |
| pj_uint32_t buf_size; |
| pj_uint32_t quality; |
| pj_uint32_t sample_size; |
| pj_uint32_t bogus_frame[2]; /**< Do not access this data */ |
| } strl_hdr_t; |
| |
| typedef struct { |
| pj_uint32_t strf; |
| pj_uint32_t strf_size; |
| pj_uint16_t fmt_tag; /**< 1 for PCM */ |
| pj_uint16_t nchannels; /**< Number of channels. */ |
| pj_uint32_t sample_rate; /**< Sampling rate. */ |
| pj_uint32_t bytes_per_sec; /**< Average bytes per second. */ |
| pj_uint16_t block_align; /**< nchannels * bits / 8 */ |
| pj_uint16_t bits_per_sample; /**< Bits per sample. */ |
| pj_uint16_t extra_size; |
| } strf_audio_hdr_t; |
| |
| /** |
| * Sizes of strf_audio_hdr_t struct, started by the size (in bytes) of |
| * 32-bits struct members, alternated with the size of 16-bits members. |
| */ |
| static const pj_uint8_t strf_audio_hdr_sizes [] = {8, 4, 8, 6}; |
| |
| typedef struct { |
| pj_uint32_t strf; |
| pj_uint32_t strf_size; |
| pj_uint32_t biSize; |
| pj_int32_t biWidth; |
| pj_int32_t biHeight; |
| pj_uint16_t biPlanes; |
| pj_uint16_t biBitCount; |
| pj_uint32_t biCompression; |
| pj_uint32_t biSizeImage; |
| pj_int32_t biXPelsPerMeter; |
| pj_int32_t biYPelsPerMeter; |
| pj_uint32_t biClrUsed; |
| pj_uint32_t biClrImportant; |
| } strf_video_hdr_t; |
| |
| static const pj_uint8_t strf_video_hdr_sizes [] = {20, 4, 24}; |
| |
| struct pjmedia_avi_hdr |
| { |
| riff_hdr_t riff_hdr; |
| avih_hdr_t avih_hdr; |
| strl_hdr_t strl_hdr[PJMEDIA_AVI_MAX_NUM_STREAMS]; |
| union { |
| strf_audio_hdr_t strf_audio_hdr; |
| strf_video_hdr_t strf_video_hdr; |
| } strf_hdr[PJMEDIA_AVI_MAX_NUM_STREAMS]; |
| }; |
| |
| #pragma pack() |
| |
| /** |
| * @see pjmedia_avi_hdr |
| */ |
| typedef struct pjmedia_avi_hdr pjmedia_avi_hdr; |
| |
| /** |
| * This structure describes generic RIFF subchunk header. |
| */ |
| typedef struct pjmedia_avi_subchunk |
| { |
| pj_uint32_t id; /**< Subchunk ASCII tag. */ |
| pj_uint32_t len; /**< Length following this field */ |
| } pjmedia_avi_subchunk; |
| |
| |
| PJ_END_DECL |
| |
| /** |
| * @} |
| */ |
| |
| |
| #endif /* __PJMEDIA_AVI_H__ */ |