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mpv/player/core.h
wm4 7b6e211e63 audio: remove handling of partially written data 
Remove the ao_buffer_playable_samples field. This contained the number
of samples that fill_audio_out_buffers() wanted to write to the AO (i.e.
this data was supposed to be played at some point), but ao_play()
rejected it due to partial fill.

This could happen with many AOs, notably those which align all written
data to an internal period size (often called "outburst" in the AO
code), and the accepted number of samples is rounded down to period
boundaries. The left-over samples at the end were still kept in
mpctx->ao_buffer, and had to be played later.

The reason ao_buffer_playable_samples had to exist was to make sure that
at EOF, the correct number of left-over samples was played (and not
possibly other data in the buffer that had to be sliced off due to
endpts in fill_audio_out_buffers()). (You'd think you could just slice
the entire buffer, but I suspect this wasn't done because the end time
could actually change due to A/V sync changes. Maybe that was the reason
it's so complicated.)

Some commits ago, ao.c gained internal buffering, and ao_play() will
never return partial writes - as long as you don't try to write more
samples than ao_get_space() reports. This is always the case. The only
exception is filling the audio buffers while paused. In this case, we
decode and play only 1 sample in order to initialize decoding (e.g. on
seeking). Actually playing this 1 sample is in fact a bug, but even of
the AO doesn't have period size alignment, you won't notice it. In
summary, this means we can safely remove the code.
2014-03-09 01:27:42 +01:00

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/*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPLAYER_MP_CORE_H
#define MPLAYER_MP_CORE_H
#include <stdbool.h>
#include "libmpv/client.h"
#include "common/common.h"
#include "options/options.h"
#include "sub/osd.h"
// definitions used internally by the core player code
#define INITIALIZED_VO 1
#define INITIALIZED_AO 2
#define INITIALIZED_PLAYBACK 16
#define INITIALIZED_LIBASS 32
#define INITIALIZED_STREAM 64
#define INITIALIZED_DEMUXER 512
#define INITIALIZED_ACODEC 1024
#define INITIALIZED_VCODEC 2048
#define INITIALIZED_SUB 4096
#define INITIALIZED_SUB2 8192
#define INITIALIZED_ALL 0xFFFF
enum stop_play_reason {
KEEP_PLAYING = 0, // must be 0, numeric values of others do not matter
AT_END_OF_FILE, // file has ended, prepare to play next
// also returned on unrecoverable playback errors
PT_NEXT_ENTRY, // prepare to play next entry in playlist
PT_CURRENT_ENTRY, // prepare to play mpctx->playlist->current
PT_STOP, // stop playback, clear playlist
PT_RESTART, // restart previous file
PT_RELOAD_DEMUXER, // restart playback, but keep stream open
PT_QUIT, // stop playback, quit player
};
enum exit_reason {
EXIT_NONE,
EXIT_QUIT,
EXIT_PLAYED,
EXIT_ERROR,
EXIT_NOTPLAYED,
EXIT_SOMENOTPLAYED
};
struct timeline_part {
double start;
double source_start;
struct demuxer *source;
};
struct chapter {
double start;
char *name;
};
enum mp_osd_seek_info {
OSD_SEEK_INFO_BAR = 1,
OSD_SEEK_INFO_TEXT = 2,
OSD_SEEK_INFO_CHAPTER_TEXT = 4,
OSD_SEEK_INFO_EDITION = 8,
};
enum {
// other constants
MAX_OSD_LEVEL = 3,
MAX_TERM_OSD_LEVEL = 1,
OSD_LEVEL_INVISIBLE = 4,
OSD_BAR_SEEK = 256,
};
enum seek_type {
MPSEEK_NONE = 0,
MPSEEK_RELATIVE,
MPSEEK_ABSOLUTE,
MPSEEK_FACTOR,
};
// A bit-mask would be best, but I preferred not to use that with the client API.
#define PAUSE_BY_COMMAND ((mpv_event_pause_reason){.by_command=1})
#define PAUSE_BY_CACHE ((mpv_event_pause_reason){.by_cache=1})
#define PAUSE_BY_KEEP_OPEN ((mpv_event_pause_reason){.by_keep_open=1})
struct track {
enum stream_type type;
// Currently used for decoding.
bool selected;
// The type specific ID, also called aid (audio), sid (subs), vid (video).
// For UI purposes only; this ID doesn't have anything to do with any
// IDs coming from demuxers or container files.
int user_tid;
// Same as stream->demuxer_id. -1 if not set.
int demuxer_id;
char *title;
bool default_track;
bool attached_picture;
char *lang;
// If this track is from an external file (e.g. subtitle file).
bool is_external;
bool no_default; // pretend it's not external for auto-selection
char *external_filename;
bool auto_loaded;
// If the track's stream changes with the timeline (ordered chapters).
bool under_timeline;
// Value can change if under_timeline==true.
struct demuxer *demuxer;
// Invariant: !stream || stream->demuxer == demuxer
struct sh_stream *stream;
// For external subtitles, which are read fully on init. Do not attempt
// to read packets from them.
bool preloaded;
};
enum {
MAX_NUM_VO_PTS = 100,
};
#define NUM_PTRACKS 2
typedef struct MPContext {
bool initialized;
bool is_cplayer;
struct mpv_global *global;
struct MPOpts *opts;
struct mp_log *log;
struct m_config *mconfig;
struct input_ctx *input;
struct mp_client_api *clients;
struct mp_dispatch_queue *dispatch;
struct mp_log *statusline;
struct osd_state *osd;
struct mp_osd_msg *osd_msg_stack;
char *term_osd_text;
char *term_osd_status;
char *term_osd_subs;
char *term_osd_contents;
char *last_window_title;
int add_osd_seek_info; // bitfield of enum mp_osd_seek_info
double osd_visible; // for the osd bar only
int osd_function;
double osd_function_visible;
double osd_last_update;
struct osd_progbar_state osd_progbar;
struct playlist *playlist;
char *filename; // currently playing file
struct mp_resolve_result *resolve_result;
enum stop_play_reason stop_play;
unsigned int initialized_flags; // which subsystems have been initialized
// Return code to use with PT_QUIT
enum exit_reason quit_player_rc;
int quit_custom_rc;
bool has_quit_custom_rc;
bool error_playing;
char **resume_defaults;
int64_t shown_vframes, shown_aframes;
struct demuxer **sources;
int num_sources;
struct timeline_part *timeline;
int num_timeline_parts;
int timeline_part;
// NOTE: even if num_chapters==0, chapters being not NULL signifies presence
// of chapter metadata
struct chapter *chapters;
int num_chapters;
double video_offset;
struct stream *stream;
struct demuxer *demuxer;
struct track **tracks;
int num_tracks;
char *track_layout_hash;
// Selected tracks. NULL if no track selected.
// There can be NUM_PTRACKS of the same STREAM_TYPE selected at once.
// Currently, this is used for the secondary subtitle track only.
struct track *current_track[NUM_PTRACKS][STREAM_TYPE_COUNT];
struct dec_video *d_video;
struct dec_audio *d_audio;
struct dec_sub *d_sub[2];
// Uses: accessing metadata (consider ordered chapters case, where the main
// demuxer defines metadata), or special purpose demuxers like TV.
struct demuxer *master_demuxer;
struct mixer *mixer;
struct ao *ao;
double ao_pts;
struct mp_audio_buffer *ao_buffer; // queued audio; passed to ao_play() later
struct vo *video_out;
/* We're starting playback from scratch or after a seek. Show first
* video frame immediately and reinitialize sync. */
bool restart_playback;
/* Set if audio should be timed to start with video frame after seeking,
* not set when e.g. playing cover art */
bool sync_audio_to_video;
/* After playback restart (above) or audio stream change, adjust audio
* stream by cutting samples or adding silence at the beginning to make
* audio playback position match video position. */
bool syncing_audio;
bool hrseek_active;
bool hrseek_framedrop;
double hrseek_pts;
// AV sync: the next frame should be shown when the audio out has this
// much (in seconds) buffered data left. Increased when more data is
// written to the ao, decreased when moving to the next frame.
// In the audio-only case used as a timer since the last seek
// by the audio CPU usage meter.
double delay;
// AV sync: time until next frame should be shown
double time_frame;
// How long the last vo flip() call took. Used to adjust timing with
// the goal of making flip() calls finish (rather than start) at the
// specified time.
double last_vo_flip_duration;
// Display duration (as "intended") of the last flipped frame.
double last_frame_duration;
// Set to true some time after a new frame has been shown, and it turns out
// that this frame was the last one before video ends.
bool playing_last_frame;
// How much video timing has been changed to make it match the audio
// timeline. Used for status line information only.
double total_avsync_change;
// Total number of dropped frames that were "approved" to be dropped.
// Actual dropping depends on --framedrop and decoder internals.
int drop_frame_cnt;
// Number of frames dropped in a row.
int dropped_frames;
// A-V sync difference when last frame was displayed. Kept to display
// the same value if the status line is updated at a time where no new
// video frame is shown.
double last_av_difference;
/* Timestamp of the latest image that was queued on the VO, but not yet
* to be flipped. */
double video_next_pts;
/* timestamp of video frame currently visible on screen
* (or at least queued to be flipped by VO) */
double video_pts;
double last_seek_pts;
// As video_pts, but is not reset when seeking away. (For the very short
// period of time until a new frame is decoded and shown.)
double last_vo_pts;
// Video PTS, or audio PTS if video has ended.
double playback_pts;
// History of video frames timestamps that were queued in the VO
// This includes even skipped frames during hr-seek
double vo_pts_history_pts[MAX_NUM_VO_PTS];
// Whether the PTS at vo_pts_history[n] is after a seek reset
uint64_t vo_pts_history_seek[MAX_NUM_VO_PTS];
uint64_t vo_pts_history_seek_ts;
uint64_t backstep_start_seek_ts;
bool backstep_active;
double audio_delay;
double last_heartbeat;
double last_metadata_update;
double last_idle_tick;
double mouse_timer;
unsigned int mouse_event_ts;
bool mouse_cursor_visible;
// used to prevent hanging in some error cases
double start_timestamp;
// Timestamp from the last time some timing functions read the
// current time, in microseconds.
// Used to turn a new time value to a delta from last time.
int64_t last_time;
// Used to communicate the parameters of a seek between parts
struct seek_params {
enum seek_type type;
double amount;
int exact; // -1 = disable, 0 = default, 1 = enable
bool immediate; // disable seek delay logic
// currently not set by commands, only used internally by seek()
int direction; // -1 = backward, 0 = default, 1 = forward
} seek;
/* Heuristic for relative chapter seeks: keep track which chapter
* the user wanted to go to, even if we aren't exactly within the
* boundaries of that chapter due to an inaccurate seek. */
int last_chapter_seek;
double last_chapter_pts;
/* Subtitle renderer. This is separate, because we want to keep fonts
* loaded across ordered chapters, instead of reloading and rescanning
* them on each transition. (Both of these objects contain this state.)
*/
struct ass_renderer *ass_renderer;
struct ass_library *ass_library;
struct mp_log *ass_log;
int last_dvb_step;
bool paused;
// step this many frames, then pause
int step_frames;
// Counted down each frame, stop playback if 0 is reached. (-1 = disable)
int max_frames;
bool playing_msg_shown;
bool paused_for_cache;
// Set after showing warning about decoding being too slow for realtime
// playback rate. Used to avoid showing it multiple times.
bool drop_message_shown;
struct screenshot_ctx *screenshot_ctx;
struct command_ctx *command_ctx;
struct encode_lavc_context *encode_lavc_ctx;
struct mp_nav_state *nav_state;
} MPContext;
// audio.c
void reinit_audio_chain(struct MPContext *mpctx);
int reinit_audio_filters(struct MPContext *mpctx);
double playing_audio_pts(struct MPContext *mpctx);
int fill_audio_out_buffers(struct MPContext *mpctx, double endpts);
double written_audio_pts(struct MPContext *mpctx);
void clear_audio_output_buffers(struct MPContext *mpctx);
void clear_audio_decode_buffers(struct MPContext *mpctx);
// configfiles.c
bool mp_parse_cfgfiles(struct MPContext *mpctx);
void mp_load_auto_profiles(struct MPContext *mpctx);
void mp_get_resume_defaults(struct MPContext *mpctx);
void mp_load_playback_resume(struct MPContext *mpctx, const char *file);
void mp_write_watch_later_conf(struct MPContext *mpctx);
struct playlist_entry *mp_check_playlist_resume(struct MPContext *mpctx,
struct playlist *playlist);
// dvdnav.c
void mp_nav_init(struct MPContext *mpctx);
void mp_nav_reset(struct MPContext *mpctx);
void mp_nav_destroy(struct MPContext *mpctx);
void mp_nav_user_input(struct MPContext *mpctx, char *command);
void mp_handle_nav(struct MPContext *mpctx);
// loadfile.c
void uninit_player(struct MPContext *mpctx, unsigned int mask);
struct track *mp_add_subtitles(struct MPContext *mpctx, char *filename);
void mp_switch_track(struct MPContext *mpctx, enum stream_type type,
struct track *track);
void mp_switch_track_n(struct MPContext *mpctx, int order,
enum stream_type type, struct track *track);
void mp_deselect_track(struct MPContext *mpctx, struct track *track);
void mp_mark_user_track_selection(struct MPContext *mpctx, int order,
enum stream_type type);
struct track *mp_track_by_tid(struct MPContext *mpctx, enum stream_type type,
int tid);
bool timeline_set_part(struct MPContext *mpctx, int i, bool force);
double timeline_set_from_time(struct MPContext *mpctx, double pts, bool *need_reset);
struct sh_stream *init_demux_stream(struct MPContext *mpctx, struct track *track);
void reselect_demux_streams(struct MPContext *mpctx);
void add_demuxer_tracks(struct MPContext *mpctx, struct demuxer *demuxer);
bool mp_remove_track(struct MPContext *mpctx, struct track *track);
struct playlist_entry *mp_next_file(struct MPContext *mpctx, int direction,
bool force);
void mp_set_playlist_entry(struct MPContext *mpctx, struct playlist_entry *e);
void mp_play_files(struct MPContext *mpctx);
// main.c
int mpv_main(int argc, char *argv[]);
int mp_initialize(struct MPContext *mpctx);
struct MPContext *mp_create(void);
void mp_destroy(struct MPContext *mpctx);
void mp_print_version(struct mp_log *log, int always);
// misc.c
double get_start_time(struct MPContext *mpctx);
double get_main_demux_pts(struct MPContext *mpctx);
double rel_time_to_abs(struct MPContext *mpctx, struct m_rel_time t,
double fallback_time);
double get_play_end_pts(struct MPContext *mpctx);
double get_relative_time(struct MPContext *mpctx);
void merge_playlist_files(struct playlist *pl);
int mp_get_cache_percent(struct MPContext *mpctx);
bool mp_get_cache_idle(struct MPContext *mpctx);
void update_window_title(struct MPContext *mpctx, bool force);
void stream_dump(struct MPContext *mpctx);
// osd.c
void print_status(struct MPContext *mpctx);
void set_osd_bar(struct MPContext *mpctx, int type, const char* name,
double min, double max, double val);
void set_osd_msg(struct MPContext *mpctx, int level, int time,
const char* fmt, ...) PRINTF_ATTRIBUTE(4,5);
void set_osd_function(struct MPContext *mpctx, int osd_function);
void set_osd_subtitle(struct MPContext *mpctx, const char *text);
// playloop.c
void pause_player(struct MPContext *mpctx, mpv_event_pause_reason reason);
void unpause_player(struct MPContext *mpctx, mpv_event_pause_reason reason);
void add_step_frame(struct MPContext *mpctx, int dir);
void queue_seek(struct MPContext *mpctx, enum seek_type type, double amount,
int exact, bool immediate);
bool mp_seek_chapter(struct MPContext *mpctx, int chapter);
double get_time_length(struct MPContext *mpctx);
double get_current_time(struct MPContext *mpctx);
int get_percent_pos(struct MPContext *mpctx);
double get_current_pos_ratio(struct MPContext *mpctx, bool use_range);
int get_current_chapter(struct MPContext *mpctx);
char *chapter_display_name(struct MPContext *mpctx, int chapter);
char *chapter_name(struct MPContext *mpctx, int chapter);
double chapter_start_time(struct MPContext *mpctx, int chapter);
int get_chapter_count(struct MPContext *mpctx);
void execute_queued_seek(struct MPContext *mpctx);
void run_playloop(struct MPContext *mpctx);
void idle_loop(struct MPContext *mpctx);
void handle_force_window(struct MPContext *mpctx, bool reconfig);
void add_frame_pts(struct MPContext *mpctx, double pts);
// sub.c
void reset_subtitles(struct MPContext *mpctx, int order);
void uninit_subs(struct demuxer *demuxer);
void reinit_subs(struct MPContext *mpctx, int order);
void update_osd_msg(struct MPContext *mpctx);
void update_subtitles(struct MPContext *mpctx);
// timeline/tl_matroska.c
void build_ordered_chapter_timeline(struct MPContext *mpctx);
// timeline/tl_mpv_edl.c
void build_mpv_edl_timeline(struct MPContext *mpctx);
// timeline/tl_cue.c
void build_cue_timeline(struct MPContext *mpctx);
// video.c
int reinit_video_chain(struct MPContext *mpctx);
int reinit_video_filters(struct MPContext *mpctx);
double update_video(struct MPContext *mpctx, double endpts);
void mp_force_video_refresh(struct MPContext *mpctx);
void update_fps(struct MPContext *mpctx);
void video_execute_format_change(struct MPContext *mpctx);
#endif /* MPLAYER_MP_CORE_H */
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