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-rw-r--r--stream/cache.c804
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diff --git a/stream/cache.c b/stream/cache.c
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+++ b/stream/cache.c
@@ -0,0 +1,804 @@
+/*
+ * 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.
+ */
+
+// Initial draft of my new cache system...
+// Note it runs in 2 processes (using fork()), but doesn't require locking!!
+// TODO: seeking, data consistency checking
+
+#define READ_SLEEP_TIME 10
+// These defines are used to reduce the cost of many successive
+// seeks (e.g. when a file has no index) by spinning quickly at first.
+#define INITIAL_FILL_USLEEP_TIME 1000
+#define INITIAL_FILL_USLEEP_COUNT 10
+#define FILL_USLEEP_TIME 50000
+#define PREFILL_SLEEP_TIME 200
+#define CONTROL_SLEEP_TIME 1
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include <libavutil/common.h>
+
+#include "config.h"
+
+#include "osdep/shmem.h"
+#include "osdep/timer.h"
+#if defined(__MINGW32__)
+#include <windows.h>
+static void ThreadProc(void *s);
+#elif defined(PTHREAD_CACHE)
+#include <pthread.h>
+static void *ThreadProc(void *s);
+#else
+#include <sys/wait.h>
+#define FORKED_CACHE 1
+#endif
+#ifndef FORKED_CACHE
+#define FORKED_CACHE 0
+#endif
+
+#include "core/mp_msg.h"
+
+#include "stream.h"
+#include "cache2.h"
+#include "core/mp_common.h"
+
+typedef struct {
+ // constats:
+ unsigned char *buffer; // base pointer of the allocated buffer memory
+ int64_t buffer_size; // size of the allocated buffer memory
+ int sector_size; // size of a single sector (2048/2324)
+ int64_t back_size; // we should keep back_size amount of old bytes for backward seek
+ int64_t fill_limit; // we should fill buffer only if space>=fill_limit
+ int64_t seek_limit; // keep filling cache if distance is less that seek limit
+#if FORKED_CACHE
+ pid_t ppid; // parent PID to detect killed parent
+#endif
+ // filler's pointers:
+ int eof;
+ int64_t min_filepos; // buffer contain only a part of the file, from min-max pos
+ int64_t max_filepos;
+ int64_t offset; // filepos <-> bufferpos offset value (filepos of the buffer's first byte)
+ // reader's pointers:
+ int64_t read_filepos;
+ // commands/locking:
+// int seek_lock; // 1 if we will seek/reset buffer, 2 if we are ready for cmd
+// int fifo_flag; // 1 if we should use FIFO to notice cache about buffer reads.
+// callback
+ stream_t *stream;
+ volatile int control;
+ volatile uint64_t control_uint_arg;
+ volatile double control_double_arg;
+ volatile struct stream_lang_req control_lang_arg;
+ volatile int control_res;
+ volatile double stream_time_length;
+ volatile double stream_time_pos;
+ volatile double stream_start_time;
+ volatile int idle;
+} cache_vars_t;
+
+static void cache_wakeup(stream_t *s)
+{
+#if FORKED_CACHE
+ // signal process to wake up immediately
+ kill(s->cache_pid, SIGUSR1);
+#endif
+}
+
+static void cache_flush(cache_vars_t *s)
+{
+ s->offset = s->min_filepos = s->max_filepos = s->read_filepos; // drop cache content :(
+}
+
+static int cache_read(cache_vars_t *s, unsigned char *buf, int size)
+{
+ int total = 0;
+ int sleep_count = 0;
+ int64_t last_max = s->max_filepos;
+ while (size > 0) {
+ int64_t pos, newb, len;
+
+ //printf("CACHE2_READ: 0x%X <= 0x%X <= 0x%X \n",s->min_filepos,s->read_filepos,s->max_filepos);
+
+ if (s->read_filepos >= s->max_filepos || s->read_filepos <
+ s->min_filepos) {
+ // eof?
+ if (s->eof)
+ break;
+ if (s->max_filepos == last_max) {
+ if (sleep_count++ == 10)
+ mp_msg(MSGT_CACHE, MSGL_WARN, "Cache empty, consider "
+ "increasing -cache and/or -cache-min. "
+ "[performance issue]\n");
+ } else {
+ last_max = s->max_filepos;
+ sleep_count = 0;
+ }
+ // waiting for buffer fill...
+ if (stream_check_interrupt(READ_SLEEP_TIME)) {
+ s->eof = 1;
+ break;
+ }
+ continue; // try again...
+ }
+ sleep_count = 0;
+
+ newb = s->max_filepos - s->read_filepos; // new bytes in the buffer
+
+// printf("*** newb: %d bytes ***\n",newb);
+
+ pos = s->read_filepos - s->offset;
+ if (pos < 0)
+ pos += s->buffer_size;
+ else if (pos >= s->buffer_size)
+ pos -= s->buffer_size;
+
+ if (newb > s->buffer_size - pos)
+ newb = s->buffer_size - pos; // handle wrap...
+ if (newb > size)
+ newb = size;
+
+ // check:
+ if (s->read_filepos < s->min_filepos)
+ mp_msg(MSGT_CACHE, MSGL_ERR,
+ "Ehh. s->read_filepos<s->min_filepos !!! Report bug...\n");
+
+ // len=write(mem,newb)
+ //printf("Buffer read: %d bytes\n",newb);
+ memcpy(buf, &s->buffer[pos], newb);
+ buf += newb;
+ len = newb;
+ // ...
+
+ s->read_filepos += len;
+ size -= len;
+ total += len;
+
+ }
+ return total;
+}
+
+static int cache_fill(cache_vars_t *s)
+{
+ int64_t back, back2, newb, space, len, pos;
+ int64_t read = s->read_filepos;
+ int read_chunk;
+ int wraparound_copy = 0;
+
+ if (read < s->min_filepos || read > s->max_filepos) {
+ // seek...
+ mp_msg(MSGT_CACHE, MSGL_DBG2,
+ "Out of boundaries... seeking to 0x%" PRIX64 " \n", read);
+ // drop cache contents only if seeking backward or too much fwd.
+ // This is also done for on-disk files, since it loses the backseek cache.
+ // That in turn can cause major bandwidth increase and performance
+ // issues with e.g. mov or badly interleaved files
+ if (read < s->min_filepos || read >= s->max_filepos + s->seek_limit) {
+ cache_flush(s);
+ if (s->stream->eof)
+ stream_reset(s->stream);
+ stream_seek_internal(s->stream, read);
+ mp_msg(MSGT_CACHE, MSGL_DBG2, "Seek done. new pos: 0x%" PRIX64 " \n",
+ (int64_t)stream_tell(s->stream));
+ }
+ }
+
+ // calc number of back-bytes:
+ back = read - s->min_filepos;
+ if (back < 0)
+ back = 0; // strange...
+ if (back > s->back_size)
+ back = s->back_size;
+
+ // calc number of new bytes:
+ newb = s->max_filepos - read;
+ if (newb < 0)
+ newb = 0; // strange...
+
+ // calc free buffer space:
+ space = s->buffer_size - (newb + back);
+
+ // calc bufferpos:
+ pos = s->max_filepos - s->offset;
+ if (pos >= s->buffer_size)
+ pos -= s->buffer_size; // wrap-around
+
+ if (space < s->fill_limit) {
+// printf("Buffer is full (%d bytes free, limit: %d)\n",space,s->fill_limit);
+ return 0; // no fill...
+ }
+
+// printf("### read=0x%X back=%d newb=%d space=%d pos=%d\n",read,back,newb,space,pos);
+
+ // try to avoid wrap-around. If not possible due to sector size
+ // do an extra copy.
+ if (space > s->buffer_size - pos) {
+ if (s->buffer_size - pos >= s->sector_size)
+ space = s->buffer_size - pos;
+ else {
+ space = s->sector_size;
+ wraparound_copy = 1;
+ }
+ }
+
+ // limit one-time block size
+ read_chunk = s->stream->read_chunk;
+ if (!read_chunk)
+ read_chunk = 4 * s->sector_size;
+ space = FFMIN(space, read_chunk);
+
+#if 1
+ // back+newb+space <= buffer_size
+ back2 = s->buffer_size - (space + newb); // max back size
+ if (s->min_filepos < (read - back2))
+ s->min_filepos = read - back2;
+#else
+ s->min_filepos = read - back; // avoid seeking-back to temp area...
+#endif
+
+ if (wraparound_copy) {
+ int to_copy;
+ len = stream_read_internal(s->stream, s->stream->buffer, space);
+ to_copy = FFMIN(len, s->buffer_size - pos);
+ memcpy(s->buffer + pos, s->stream->buffer, to_copy);
+ memcpy(s->buffer, s->stream->buffer + to_copy, len - to_copy);
+ } else
+ len = stream_read_internal(s->stream, &s->buffer[pos], space);
+ s->eof = !len;
+
+ s->max_filepos += len;
+ if (pos + len >= s->buffer_size)
+ s->offset += s->buffer_size; // wrap...
+
+ return len;
+
+}
+
+static int cache_execute_control(cache_vars_t *s)
+{
+ double double_res;
+ unsigned uint_res;
+ uint64_t uint64_res;
+ int needs_flush = 0;
+ static double last;
+ int quit = s->control == -2;
+ uint64_t old_pos = s->stream->pos;
+ int old_eof = s->stream->eof;
+ if (quit || !s->stream->control) {
+ s->stream_time_length = 0;
+ s->stream_time_pos = MP_NOPTS_VALUE;
+ s->control_res = STREAM_UNSUPPORTED;
+ s->control = -1;
+ return !quit;
+ }
+ if (mp_time_sec() - last > 0.099) {
+ double len, pos;
+ if (s->stream->control(s->stream, STREAM_CTRL_GET_TIME_LENGTH,
+ &len) == STREAM_OK)
+ s->stream_time_length = len;
+ else
+ s->stream_time_length = 0;
+ if (s->stream->control(s->stream, STREAM_CTRL_GET_CURRENT_TIME,
+ &pos) == STREAM_OK)
+ s->stream_time_pos = pos;
+ else
+ s->stream_time_pos = MP_NOPTS_VALUE;
+ if (s->stream->control(s->stream, STREAM_CTRL_GET_START_TIME,
+ &pos) == STREAM_OK)
+ s->stream_start_time = pos;
+ else
+ s->stream_start_time = MP_NOPTS_VALUE;
+#if FORKED_CACHE
+ // if parent PID changed, main process was killed -> exit
+ if (s->ppid != getppid()) {
+ mp_msg(MSGT_CACHE, MSGL_WARN,
+ "Parent process disappeared, exiting cache process.\n");
+ return 0;
+ }
+#endif
+ last = mp_time_sec();
+ }
+ if (s->control == -1)
+ return 1;
+ switch (s->control) {
+ case STREAM_CTRL_SEEK_TO_TIME:
+ needs_flush = 1;
+ case STREAM_CTRL_GET_CURRENT_TIME:
+ case STREAM_CTRL_GET_ASPECT_RATIO:
+ case STREAM_CTRL_GET_START_TIME:
+ case STREAM_CTRL_GET_CHAPTER_TIME:
+ double_res = s->control_double_arg;
+ s->control_res = s->stream->control(s->stream, s->control, &double_res);
+ s->control_double_arg = double_res;
+ break;
+ case STREAM_CTRL_SEEK_TO_CHAPTER:
+ case STREAM_CTRL_SET_ANGLE:
+ needs_flush = 1;
+ uint_res = s->control_uint_arg;
+ case STREAM_CTRL_GET_NUM_TITLES:
+ case STREAM_CTRL_GET_NUM_CHAPTERS:
+ case STREAM_CTRL_GET_CURRENT_TITLE:
+ case STREAM_CTRL_GET_CURRENT_CHAPTER:
+ case STREAM_CTRL_GET_NUM_ANGLES:
+ case STREAM_CTRL_GET_ANGLE:
+ s->control_res = s->stream->control(s->stream, s->control, &uint_res);
+ s->control_uint_arg = uint_res;
+ break;
+ case STREAM_CTRL_GET_SIZE:
+ s->control_res = s->stream->control(s->stream, s->control, &uint64_res);
+ s->control_uint_arg = uint64_res;
+ break;
+ case STREAM_CTRL_GET_LANG:
+ s->control_res = s->stream->control(s->stream, s->control,
+ (void *)&s->control_lang_arg);
+ break;
+ case STREAM_CTRL_MANAGES_TIMELINE:
+ s->control_res = s->stream->control(s->stream, s->control, NULL);
+ break;
+ default:
+ s->control_res = STREAM_UNSUPPORTED;
+ break;
+ }
+ if (s->control_res == STREAM_OK && needs_flush) {
+ s->read_filepos = s->stream->pos;
+ s->eof = s->stream->eof;
+ cache_flush(s);
+ } else if (needs_flush &&
+ (old_pos != s->stream->pos || old_eof != s->stream->eof))
+ mp_msg(
+ MSGT_STREAM, MSGL_ERR,
+ "STREAM_CTRL changed stream pos but returned error, this is not allowed!\n");
+ s->control = -1;
+ return 1;
+}
+
+static void *shared_alloc(int64_t size)
+{
+#if FORKED_CACHE
+ return shmem_alloc(size);
+#else
+ return malloc(size);
+#endif
+}
+
+static void shared_free(void *ptr, int64_t size)
+{
+#if FORKED_CACHE
+ shmem_free(ptr, size);
+#else
+ free(ptr);
+#endif
+}
+
+static cache_vars_t *cache_init(int64_t size, int sector)
+{
+ int64_t num;
+ cache_vars_t *s = shared_alloc(sizeof(cache_vars_t));
+ if (s == NULL)
+ return NULL;
+
+ memset(s, 0, sizeof(cache_vars_t));
+ num = size / sector;
+ if (num < 32)
+ num = 32;
+ //64kb min_size
+ s->buffer_size = num * sector;
+ s->sector_size = sector;
+ s->buffer = shared_alloc(s->buffer_size);
+
+ if (s->buffer == NULL) {
+ shared_free(s, sizeof(cache_vars_t));
+ return NULL;
+ }
+
+ s->fill_limit = 8 * sector;
+ s->back_size = s->buffer_size / 2;
+#if FORKED_CACHE
+ s->ppid = getpid();
+#endif
+ return s;
+}
+
+void cache_uninit(stream_t *s)
+{
+ cache_vars_t *c = s->cache_data;
+ if (s->cache_pid) {
+#if !FORKED_CACHE
+ cache_do_control(s, -2, NULL);
+#else
+ kill(s->cache_pid, SIGKILL);
+ waitpid(s->cache_pid, NULL, 0);
+#endif
+ s->cache_pid = 0;
+ }
+ if (!c)
+ return;
+ shared_free(c->buffer, c->buffer_size);
+ c->buffer = NULL;
+ c->stream = NULL;
+ shared_free(s->cache_data, sizeof(cache_vars_t));
+ s->cache_data = NULL;
+}
+
+#if FORKED_CACHE
+static void exit_sighandler(int x)
+{
+ // close stream
+ exit(0);
+}
+
+static void dummy_sighandler(int x)
+{
+}
+#endif
+
+/**
+ * Main loop of the cache process or thread.
+ */
+static void cache_mainloop(cache_vars_t *s)
+{
+ int sleep_count = 0;
+#if FORKED_CACHE
+ struct sigaction sa = {
+ .sa_handler = SIG_IGN
+ };
+ sigaction(SIGUSR1, &sa, NULL);
+#endif
+ do {
+ if (!cache_fill(s)) {
+ s->idle = 1;
+#if FORKED_CACHE
+ // Let signal wake us up, we cannot leave this
+ // enabled since we do not handle EINTR in most places.
+ // This might need extra code to work on BSD.
+ sa.sa_handler = dummy_sighandler;
+ sigaction(SIGUSR1, &sa, NULL);
+#endif
+ if (sleep_count < INITIAL_FILL_USLEEP_COUNT) {
+ sleep_count++;
+ mp_sleep_us(INITIAL_FILL_USLEEP_TIME);
+ } else
+ mp_sleep_us(FILL_USLEEP_TIME); // idle
+#if FORKED_CACHE
+ sa.sa_handler = SIG_IGN;
+ sigaction(SIGUSR1, &sa, NULL);
+#endif
+ } else {
+ sleep_count = 0;
+ s->idle = 0;
+ }
+ } while (cache_execute_control(s));
+}
+
+int stream_enable_cache_percent(stream_t *stream, int64_t stream_cache_size,
+ float stream_cache_min_percent,
+ float stream_cache_seek_min_percent)
+{
+ return stream_enable_cache(stream, stream_cache_size * 1024,
+ stream_cache_size * 1024 *
+ (stream_cache_min_percent / 100.0),
+ stream_cache_size * 1024 *
+ (stream_cache_seek_min_percent / 100.0));
+}
+
+/**
+ * \return 1 on success, 0 if the function was interrupted and -1 on error
+ */
+int stream_enable_cache(stream_t *stream, int64_t size, int64_t min,
+ int64_t seek_limit)
+{
+ if (size < 0)
+ size = stream->cache_size * 1024;
+ if (!size)
+ return 1;
+ mp_tmsg(MSGT_NETWORK, MSGL_INFO, "Cache size set to %" PRId64 " KiB\n",
+ size / 1024);
+
+ int ss = stream->sector_size ? stream->sector_size : STREAM_BUFFER_SIZE;
+ int res = -1;
+ cache_vars_t *s;
+
+ if (size > SIZE_MAX) {
+ mp_msg(MSGT_CACHE, MSGL_FATAL,
+ "Cache size larger than max. allocation size\n");
+ return -1;
+ }
+
+ s = cache_init(size, ss);
+ if (s == NULL)
+ return -1;
+ stream->cache_data = s;
+ s->stream = stream; // callback
+ s->seek_limit = seek_limit;
+
+
+ //make sure that we won't wait from cache_fill
+ //more data than it is allowed to fill
+ if (s->seek_limit > s->buffer_size - s->fill_limit)
+ s->seek_limit = s->buffer_size - s->fill_limit;
+ if (min > s->buffer_size - s->fill_limit)
+ min = s->buffer_size - s->fill_limit;
+ // to make sure we wait for the cache process/thread to be active
+ // before continuing
+ if (min <= 0)
+ min = 1;
+
+#if FORKED_CACHE
+ if ((stream->cache_pid = fork())) {
+ if ((pid_t)stream->cache_pid == -1)
+ stream->cache_pid = 0;
+#else
+ {
+ stream_t *stream2 = malloc(sizeof(stream_t));
+ memcpy(stream2, s->stream, sizeof(stream_t));
+ s->stream = stream2;
+#if defined(__MINGW32__)
+ stream->cache_pid = _beginthread(ThreadProc, 0, s);
+#else
+ {
+ pthread_t tid;
+ pthread_create(&tid, NULL, ThreadProc, s);
+ stream->cache_pid = 1;
+ }
+#endif
+#endif
+ if (!stream->cache_pid) {
+ mp_msg(MSGT_CACHE, MSGL_ERR,
+ "Starting cache process/thread failed: %s.\n",
+ strerror(errno));
+ goto err_out;
+ }
+ // wait until cache is filled at least prefill_init %
+ mp_msg(MSGT_CACHE, MSGL_V, "CACHE_PRE_INIT: %" PRId64 " [%" PRId64 "] "
+ "%" PRId64 " pre:%" PRId64 " eof:%d \n",
+ s->min_filepos, s->read_filepos, s->max_filepos, min, s->eof);
+ while (s->read_filepos < s->min_filepos ||
+ s->max_filepos - s->read_filepos < min)
+ {
+ mp_tmsg(MSGT_CACHE, MSGL_STATUS, "\rCache fill: %5.2f%% "
+ "(%" PRId64 " bytes) ",
+ 100.0 * (float)(s->max_filepos - s->read_filepos) /
+ (float)(s->buffer_size),
+ s->max_filepos - s->read_filepos);
+ if (s->eof)
+ break; // file is smaller than prefill size
+ if (stream_check_interrupt(PREFILL_SLEEP_TIME)) {
+ res = 0;
+ goto err_out;
+ }
+ }
+ mp_msg(MSGT_CACHE, MSGL_STATUS, "\n");
+ stream->cached = true;
+ return 1; // parent exits
+
+err_out:
+ cache_uninit(stream);
+ return res;
+ }
+
+#if FORKED_CACHE
+ signal(SIGTERM, exit_sighandler); // kill
+ cache_mainloop(s);
+ // make sure forked code never leaves this function
+ exit(0);
+#endif
+}
+
+#if !FORKED_CACHE
+#if defined(__MINGW32__)
+static void ThreadProc(void *s)
+{
+ cache_mainloop(s);
+ _endthread();
+}
+#else
+static void *ThreadProc(void *s)
+{
+ cache_mainloop(s);
+ return NULL;
+}
+#endif
+#endif
+
+int cache_stream_fill_buffer(stream_t *s)
+{
+ int len;
+ int sector_size;
+ if (!s->cache_pid)
+ return stream_fill_buffer(s);
+
+ if (s->pos != ((cache_vars_t *)s->cache_data)->read_filepos)
+ mp_msg(MSGT_CACHE, MSGL_ERR,
+ "!!! read_filepos differs!!! report this bug...\n");
+ sector_size = ((cache_vars_t *)s->cache_data)->sector_size;
+ if (sector_size > STREAM_MAX_SECTOR_SIZE) {
+ mp_msg(MSGT_CACHE, MSGL_ERR, "Sector size %i larger than maximum %i\n",
+ sector_size,
+ STREAM_MAX_SECTOR_SIZE);
+ sector_size = STREAM_MAX_SECTOR_SIZE;
+ }
+
+ len = cache_read(s->cache_data, s->buffer, sector_size);
+ //printf("cache_stream_fill_buffer->read -> %d\n",len);
+
+ if (len <= 0) {
+ s->eof = 1;
+ s->buf_pos = s->buf_len = 0;
+ return 0;
+ }
+ s->eof = 0;
+ s->buf_pos = 0;
+ s->buf_len = len;
+ s->pos += len;
+// printf("[%d]",len);fflush(stdout);
+ stream_capture_write(s);
+ return len;
+
+}
+
+int cache_stream_seek_long(stream_t *stream, int64_t pos)
+{
+ cache_vars_t *s;
+ int64_t newpos;
+ if (!stream->cache_pid)
+ return stream_seek_long(stream, pos);
+
+ s = stream->cache_data;
+// s->seek_lock=1;
+
+ mp_msg(MSGT_CACHE, MSGL_DBG2, "CACHE2_SEEK: 0x%" PRIX64 " <= 0x%" PRIX64
+ " (0x%" PRIX64 ") <= 0x%" PRIX64 " \n",
+ s->min_filepos, pos, s->read_filepos, s->max_filepos);
+
+ newpos = pos / s->sector_size;
+ newpos *= s->sector_size; // align
+ stream->pos = s->read_filepos = newpos;
+ s->eof = 0; // !!!!!!!
+ cache_wakeup(stream);
+
+ cache_stream_fill_buffer(stream);
+
+ pos -= newpos;
+ if (pos >= 0 && pos <= stream->buf_len) {
+ stream->buf_pos = pos; // byte position in sector
+ return 1;
+ }
+
+// stream->buf_pos=stream->buf_len=0;
+// return 1;
+
+ mp_msg(MSGT_CACHE, MSGL_V,
+ "cache_stream_seek: WARNING! Can't seek to 0x%" PRIX64 " !\n",
+ pos + newpos);
+ return 0;
+}
+
+int cache_do_control(stream_t *stream, int cmd, void *arg)
+{
+ int sleep_count = 0;
+ int pos_change = 0;
+ cache_vars_t *s = stream->cache_data;
+ switch (cmd) {
+ case STREAM_CTRL_GET_CACHE_SIZE:
+ *(int64_t *)arg = s->buffer_size;
+ return STREAM_OK;
+ case STREAM_CTRL_GET_CACHE_FILL:
+ *(int64_t *)arg = s->max_filepos - s->read_filepos;
+ return STREAM_OK;
+ case STREAM_CTRL_GET_CACHE_IDLE:
+ *(int *)arg = s->idle;
+ return STREAM_OK;
+ case STREAM_CTRL_SEEK_TO_TIME:
+ s->control_double_arg = *(double *)arg;
+ s->control = cmd;
+ pos_change = 1;
+ break;
+ case STREAM_CTRL_SEEK_TO_CHAPTER:
+ case STREAM_CTRL_SET_ANGLE:
+ s->control_uint_arg = *(unsigned *)arg;
+ s->control = cmd;
+ pos_change = 1;
+ break;
+ // the core might call these every frame, so cache them...
+ case STREAM_CTRL_GET_TIME_LENGTH:
+ *(double *)arg = s->stream_time_length;
+ return s->stream_time_length ? STREAM_OK : STREAM_UNSUPPORTED;
+ case STREAM_CTRL_GET_CURRENT_TIME:
+ *(double *)arg = s->stream_time_pos;
+ return s->stream_time_pos !=
+ MP_NOPTS_VALUE ? STREAM_OK : STREAM_UNSUPPORTED;
+ case STREAM_CTRL_GET_START_TIME:
+ *(double *)arg = s->stream_start_time;
+ return s->stream_start_time !=
+ MP_NOPTS_VALUE ? STREAM_OK : STREAM_UNSUPPORTED;
+ case STREAM_CTRL_GET_CHAPTER_TIME:
+ s->control_double_arg = *(double *)arg;
+ s->control = cmd;
+ break;
+ case STREAM_CTRL_GET_LANG:
+ s->control_lang_arg = *(struct stream_lang_req *)arg;
+ case STREAM_CTRL_GET_NUM_TITLES:
+ case STREAM_CTRL_GET_NUM_CHAPTERS:
+ case STREAM_CTRL_GET_CURRENT_TITLE:
+ case STREAM_CTRL_GET_CURRENT_CHAPTER:
+ case STREAM_CTRL_GET_ASPECT_RATIO:
+ case STREAM_CTRL_GET_NUM_ANGLES:
+ case STREAM_CTRL_GET_ANGLE:
+ case STREAM_CTRL_GET_SIZE:
+ case STREAM_CTRL_MANAGES_TIMELINE:
+ case -2:
+ s->control = cmd;
+ break;
+ default:
+ return STREAM_UNSUPPORTED;
+ }
+ cache_wakeup(stream);
+ while (s->control != -1) {
+ if (sleep_count++ == 1000)
+ mp_msg(MSGT_CACHE, MSGL_WARN,
+ "Cache not responding! [performance issue]\n");
+ if (stream_check_interrupt(CONTROL_SLEEP_TIME)) {
+ s->eof = 1;
+ return STREAM_UNSUPPORTED;
+ }
+ }
+ if (s->control_res != STREAM_OK)
+ return s->control_res;
+ // We cannot do this on failure, since this would cause the
+ // stream position to jump when e.g. STREAM_CTRL_SEEK_TO_TIME
+ // is unsupported - but in that case we need the old value
+ // to do the fallback seek.
+ // This unfortunately can lead to slightly different behaviour
+ // with and without cache if the protocol changes pos even
+ // when an error happened.
+ if (pos_change) {
+ stream->pos = s->read_filepos;
+ stream->eof = s->eof;
+ }
+ switch (cmd) {
+ case STREAM_CTRL_GET_TIME_LENGTH:
+ case STREAM_CTRL_GET_CURRENT_TIME:
+ case STREAM_CTRL_GET_ASPECT_RATIO:
+ case STREAM_CTRL_GET_START_TIME:
+ case STREAM_CTRL_GET_CHAPTER_TIME:
+ *(double *)arg = s->control_double_arg;
+ break;
+ case STREAM_CTRL_GET_NUM_TITLES:
+ case STREAM_CTRL_GET_NUM_CHAPTERS:
+ case STREAM_CTRL_GET_CURRENT_TITLE:
+ case STREAM_CTRL_GET_CURRENT_CHAPTER:
+ case STREAM_CTRL_GET_NUM_ANGLES:
+ case STREAM_CTRL_GET_ANGLE:
+ *(unsigned *)arg = s->control_uint_arg;
+ break;
+ case STREAM_CTRL_GET_SIZE:
+ *(uint64_t *)arg = s->control_uint_arg;
+ break;
+ case STREAM_CTRL_GET_LANG:
+ *(struct stream_lang_req *)arg = s->control_lang_arg;
+ break;
+ case STREAM_CTRL_MANAGES_TIMELINE:
+ break;
+ }
+ return s->control_res;
+}