X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Finternal.h;h=de55af5af4d878514e7e323baf244e30b5e54445;hb=75d98e30afab61542faab3c0f11880834653bd6b;hp=45736687d3d9c089cf6567dfbfba70eea4d09b58;hpb=c3f9ebf74371b63fba0e7491e61904bbd165cd0f;p=ffmpeg diff --git a/libavformat/internal.h b/libavformat/internal.h index 45736687d3d..de55af5af4d 100644 --- a/libavformat/internal.h +++ b/libavformat/internal.h @@ -23,6 +23,7 @@ #include #include "avformat.h" +#include "os_support.h" #define MAX_URL_SIZE 4096 @@ -33,10 +34,92 @@ #endif typedef struct AVCodecTag { - enum CodecID id; + enum AVCodecID id; unsigned int tag; } AVCodecTag; +typedef struct CodecMime{ + char str[32]; + enum AVCodecID id; +} CodecMime; + +struct AVFormatInternal { + /** + * Number of streams relevant for interleaving. + * Muxing only. + */ + int nb_interleaved_streams; + + /** + * This buffer is only needed when packets were already buffered but + * not decoded, for example to get the codec parameters in MPEG + * streams. + */ + struct AVPacketList *packet_buffer; + struct AVPacketList *packet_buffer_end; + + /* av_seek_frame() support */ + int64_t data_offset; /**< offset of the first packet */ + + /** + * Raw packets from the demuxer, prior to parsing and decoding. + * This buffer is used for buffering packets until the codec can + * be identified, as parsing cannot be done without knowing the + * codec. + */ + struct AVPacketList *raw_packet_buffer; + struct AVPacketList *raw_packet_buffer_end; + /** + * Packets split by the parser get queued here. + */ + struct AVPacketList *parse_queue; + struct AVPacketList *parse_queue_end; + /** + * Remaining size available for raw_packet_buffer, in bytes. + */ +#define RAW_PACKET_BUFFER_SIZE 2500000 + int raw_packet_buffer_remaining_size; + + /** + * Offset to remap timestamps to be non-negative. + * Expressed in timebase units. + */ + int64_t offset; + + /** + * Timebase for the timestamp offset. + */ + AVRational offset_timebase; + +#if FF_API_COMPUTE_PKT_FIELDS2 + int missing_ts_warning; +#endif +}; + +struct AVStreamInternal { + /** + * Set to 1 if the codec allows reordering, so pts can be different + * from dts. + */ + int reorder; + /** + * The codec context used by avformat_find_stream_info, the parser, etc. + */ + AVCodecContext *avctx; + /** + * 1 if avctx has been initialized with the values from the codec parameters + */ + int avctx_inited; + + enum AVCodecID orig_codec_id; + +#if FF_API_LAVF_AVCTX + // whether the deprecated stream codec context needs + // to be filled from the codec parameters + int need_codec_update; +#endif +}; + void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem); #ifdef __GNUC__ @@ -54,7 +137,7 @@ do {\ } while(0) #endif -struct tm *brktimegm(time_t secs, struct tm *tm); +struct tm *ff_brktimegm(time_t secs, struct tm *tm); char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase); @@ -74,8 +157,8 @@ void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int i * Add packet to AVFormatContext->packet_buffer list, determining its * interleaved position using compare() function argument. */ -void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, - int (*compare)(AVFormatContext *, AVPacket *, AVPacket *)); +int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, + int (*compare)(AVFormatContext *, AVPacket *, AVPacket *)); void ff_read_frame_flush(AVFormatContext *s); @@ -85,31 +168,6 @@ void ff_read_frame_flush(AVFormatContext *s); /** Get the current time since NTP epoch in microseconds. */ uint64_t ff_ntp_time(void); -/** - * Assemble a URL string from components. This is the reverse operation - * of av_url_split. - * - * Note, this requires networking to be initialized, so the caller must - * ensure ff_network_init has been called. - * - * @see av_url_split - * - * @param str the buffer to fill with the url - * @param size the size of the str buffer - * @param proto the protocol identifier, if null, the separator - * after the identifier is left out, too - * @param authorization an optional authorization string, may be null. - * An empty string is treated the same as a null string. - * @param hostname the host name string - * @param port the port number, left out from the string if negative - * @param fmt a generic format string for everything to add after the - * host/port, may be null - * @return the number of characters written to the destination buffer - */ -int ff_url_join(char *str, int size, const char *proto, - const char *authorization, const char *hostname, - int port, const char *fmt, ...) av_printf_format(7, 8); - /** * Append the media-specific SDP fragment for the media stream c * to the buffer buff. @@ -119,7 +177,8 @@ int ff_url_join(char *str, int size, const char *proto, * * @param buff the buffer to append the SDP fragment to * @param size the size of the buff buffer - * @param c the AVCodecContext of the media to describe + * @param st the AVStream of the media to describe + * @param idx the global stream index * @param dest_addr the destination address of the media stream, may be NULL * @param dest_type the destination address type, may be NULL * @param port the destination port of the media stream, 0 if unknown @@ -127,7 +186,7 @@ int ff_url_join(char *str, int size, const char *proto, * @param fmt the AVFormatContext, which might contain options modifying * the generated SDP */ -void ff_sdp_write_media(char *buff, int size, AVCodecContext *c, +void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx, const char *dest_addr, const char *dest_type, int port, int ttl, AVFormatContext *fmt); @@ -235,18 +294,7 @@ AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, */ void ff_reduce_index(AVFormatContext *s, int stream_index); -/* - * Convert a relative url into an absolute url, given a base url. - * - * @param buf the buffer where output absolute url is written - * @param size the size of buf - * @param base the base url, may be equal to buf. - * @param rel the new url, which is interpreted relative to base - */ -void ff_make_absolute_url(char *buf, int size, const char *base, - const char *rel); - -enum CodecID ff_guess_image2_codec(const char *filename); +enum AVCodecID ff_guess_image2_codec(const char *filename); /** * Convert a date string in ISO8601 format to Unix timestamp. @@ -287,16 +335,121 @@ int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )); /** - * Set the pts for a given stream. If the new values would be invalid - * (<= 0), it leaves the AVStream unchanged. + * Set the time base and wrapping info for a given stream. This will be used + * to interpret the stream's timestamps. If the new time base is invalid + * (numerator or denominator are non-positive), it leaves the stream + * unchanged. * * @param s stream * @param pts_wrap_bits number of bits effectively used by the pts - * (used for wrap control, 33 is the value for MPEG) - * @param pts_num numerator to convert to seconds (MPEG: 1) - * @param pts_den denominator to convert to seconds (MPEG: 90000) + * (used for wrap control) + * @param pts_num time base numerator + * @param pts_den time base denominator */ void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den); +/** + * Add side data to a packet for changing parameters to the given values. + * Parameters set to 0 aren't included in the change. + */ +int ff_add_param_change(AVPacket *pkt, int32_t channels, + uint64_t channel_layout, int32_t sample_rate, + int32_t width, int32_t height); + +/** + * Set the timebase for each stream from the corresponding codec timebase and + * print it. + */ +int ff_framehash_write_header(AVFormatContext *s); + +/** + * Read a transport packet from a media file. + * + * @param s media file handle + * @param pkt is filled + * @return 0 if OK, AVERROR_xxx on error + */ +int ff_read_packet(AVFormatContext *s, AVPacket *pkt); + +/** + * Interleave a packet per dts in an output media file. + * + * Packets with pkt->destruct == av_destruct_packet will be freed inside this + * function, so they cannot be used after it. Note that calling av_packet_unref() + * on them is still safe. + * + * @param s media file handle + * @param out the interleaved packet will be output here + * @param pkt the input packet + * @param flush 1 if no further packets are available as input and all + * remaining packets should be output + * @return 1 if a packet was output, 0 if no packet could be output, + * < 0 if an error occurred + */ +int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, + AVPacket *pkt, int flush); + +/** + * Return the frame duration in seconds. Return 0 if not available. + */ +void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st, + AVCodecParserContext *pc, AVPacket *pkt); + +unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id); + +enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag); + +/** + * Select a PCM codec based on the given parameters. + * + * @param bps bits-per-sample + * @param flt floating-point + * @param be big-endian + * @param sflags signed flags. each bit corresponds to one byte of bit depth. + * e.g. the 1st bit indicates if 8-bit should be signed or + * unsigned, the 2nd bit indicates if 16-bit should be signed or + * unsigned, etc... This is useful for formats such as WAVE where + * only 8-bit is unsigned and all other bit depths are signed. + * @return a PCM codec id or AV_CODEC_ID_NONE + */ +enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags); + +/** + * Generate standard extradata for AVC-Intra based on width/height and field + * order. + */ +int ff_generate_avci_extradata(AVStream *st); + +/** + * Wrap errno on rename() error. + * + * @param oldpath source path + * @param newpath destination path + * @return 0 or AVERROR on failure + */ +static inline int ff_rename(const char *oldpath, const char *newpath) +{ + if (rename(oldpath, newpath) == -1) + return AVERROR(errno); + return 0; +} + +/** + * A wrapper around AVFormatContext.io_close that should be used + * instead of calling the pointer directly. + */ +void ff_format_io_close(AVFormatContext *s, AVIOContext **pb); + +/** + * Find the next packet in the interleaving queue for the given stream. + * The pkt parameter is filled in with the queued packet, including + * references to the data (which the caller is not allowed to keep or + * modify). + * + * @return 0 if a packet was found, a negative value if no packet was found + */ +int ff_interleaved_peek(AVFormatContext *s, int stream, + AVPacket *pkt, int add_offset); + #endif /* AVFORMAT_INTERNAL_H */