Merge remote-tracking branch 'lukaszmluki/master'

* lukaszmluki/master:
  lavd/pulse_audio_enc: respect minreq while checking buffer fullness
  lavd/pulse_audio_enc: signal that buffer is still writable after write
  lavd/pulse_audio_enc: add pointer checks
  lavd/pulse_audio_enc: add more buffer attributes
  lavd/fbdev_dec: implement fbdev_get_device_list callback
  lavd/fbdev_enc: move list device code to fbdev_common
  lavd/fbdev_enc: remove redundant assignments

Merged-by: Michael Niedermayer <michaelni@gmx.at>

doc/outdevs.texi

@@ -290,6 +290,20 @@ When both options are provided then the highest value is used
 are set to 0 (which is default), the device will use the default
 PulseAudio duration value. By default PulseAudio set buffer duration
 to around 2 seconds.
+
+@item prebuf
+Specify pre-buffering size in bytes. The server does not start with
+playback before at least @option{prebuf} bytes are available in the
+buffer. By default this option is initialized to the same value as
+@option{buffer_size} or @option{buffer_duration} (whichever is bigger).
+
+@item minreq
+Specify minimum request size in bytes. The server does not request less
+than @option{minreq} bytes from the client, instead waits until the buffer
+is free enough to request more bytes at once. It is recommended to not set
+this option, which will initialize this to a value that is deemed sensible
+by the server.
+
 @end table
 
 @subsection Examples

libavdevice/fbdev_common.c

@@ -20,9 +20,13 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
 #include <stdlib.h>
 #include "fbdev_common.h"
 #include "libavutil/common.h"
+#include "avdevice.h"
 
 struct rgb_pixfmt_map_entry {
     int bits_per_pixel;
@@ -65,3 +69,61 @@ const char* ff_fbdev_default_device()
     return dev;
 }
 
+int ff_fbdev_get_device_list(AVDeviceInfoList *device_list)
+{
+    struct fb_var_screeninfo varinfo;
+    struct fb_fix_screeninfo fixinfo;
+    char device_file[12];
+    AVDeviceInfo *device = NULL;
+    int i, fd, ret = 0;
+    const char *default_device = ff_fbdev_default_device();
+
+    if (!device_list)
+        return AVERROR(EINVAL);
+
+    for (i = 0; i <= 31; i++) {
+        snprintf(device_file, sizeof(device_file), "/dev/fb%d", i);
+
+        if ((fd = avpriv_open(device_file, O_RDWR)) < 0)
+            continue;
+        if (ioctl(fd, FBIOGET_VSCREENINFO, &varinfo) == -1)
+            goto fail_device;
+        if (ioctl(fd, FBIOGET_FSCREENINFO, &fixinfo) == -1)
+            goto fail_device;
+
+        device = av_mallocz(sizeof(AVDeviceInfo));
+        if (!device) {
+            ret = AVERROR(ENOMEM);
+            goto fail_device;
+        }
+        device->device_name = av_strdup(device_file);
+        device->device_description = av_strdup(fixinfo.id);
+        if (!device->device_name || !device->device_description) {
+            ret = AVERROR(ENOMEM);
+            goto fail_device;
+        }
+
+        if ((ret = av_dynarray_add_nofree(&device_list->devices,
+                                          &device_list->nb_devices, device)) < 0)
+            goto fail_device;
+
+        if (default_device && !strcmp(device->device_name, default_device)) {
+            device_list->default_device = device_list->nb_devices - 1;
+            default_device = NULL;
+        }
+        close(fd);
+        continue;
+
+      fail_device:
+        if (device) {
+            av_free(device->device_name);
+            av_free(device->device_description);
+            av_freep(&device);
+        }
+        if (fd >= 0)
+            close(fd);
+        if (ret < 0)
+            return ret;
+    }
+    return 0;
+}

libavdevice/fbdev_common.h

@@ -27,8 +27,12 @@
 #include <linux/fb.h>
 #include "libavutil/pixfmt.h"
 
+struct AVDeviceInfoList;
+
 enum AVPixelFormat ff_get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *varinfo);
 
 const char* ff_fbdev_default_device(void);
 
+int ff_fbdev_get_device_list(struct AVDeviceInfoList *device_list);
+
 #endif /* AVDEVICE_FBDEV_COMMON_H */

libavdevice/fbdev_dec.c

@@ -205,6 +205,11 @@ static av_cold int fbdev_read_close(AVFormatContext *avctx)
     return 0;
 }
 
+static int fbdev_get_device_list(AVFormatContext *s, AVDeviceInfoList *device_list)
+{
+    return ff_fbdev_get_device_list(device_list);
+}
+
 #define OFFSET(x) offsetof(FBDevContext, x)
 #define DEC AV_OPT_FLAG_DECODING_PARAM
 static const AVOption options[] = {
@@ -227,6 +232,7 @@ AVInputFormat ff_fbdev_demuxer = {
     .read_header    = fbdev_read_header,
     .read_packet    = fbdev_read_packet,
     .read_close     = fbdev_read_close,
+    .get_device_list = fbdev_get_device_list,
     .flags          = AVFMT_NOFILE,
     .priv_class     = &fbdev_class,
 };

libavdevice/fbdev_enc.c

@@ -186,64 +186,7 @@ static av_cold int fbdev_write_trailer(AVFormatContext *h)
 
 static int fbdev_get_device_list(AVFormatContext *s, AVDeviceInfoList *device_list)
 {
-    struct fb_var_screeninfo varinfo;
-    struct fb_fix_screeninfo fixinfo;
-    char device_file[12];
-    AVDeviceInfo *device = NULL;
-    int i, fd = -1, ret = 0;
-    const char *default_device = ff_fbdev_default_device();
-
-    if (!device_list)
-        return AVERROR(EINVAL);
-
-    for (i = 0; i <= 31; i++) {
-        snprintf(device_file, sizeof(device_file), "/dev/fb%d", i);
-
-        if ((fd = avpriv_open(device_file, O_RDWR)) < 0)
-            continue;
-        if (ioctl(fd, FBIOGET_VSCREENINFO, &varinfo) == -1)
-            goto fail_device;
-        if (ioctl(fd, FBIOGET_FSCREENINFO, &fixinfo) == -1)
-            goto fail_device;
-
-        device = av_mallocz(sizeof(AVDeviceInfo));
-        if (!device) {
-            ret = AVERROR(ENOMEM);
-            goto fail_device;
-        }
-        device->device_name = av_strdup(device_file);
-        device->device_description = av_strdup(fixinfo.id);
-        if (!device->device_name || !device->device_description) {
-            ret = AVERROR(ENOMEM);
-            goto fail_device;
-        }
-
-        if ((ret = av_dynarray_add_nofree(&device_list->devices,
-                                          &device_list->nb_devices, device)) < 0)
-            goto fail_device;
-
-        if (default_device && !strcmp(device->device_name, default_device)) {
-            device_list->default_device = device_list->nb_devices - 1;
-            default_device = NULL;
-        }
-        close(fd);
-        fd = -1;
-        continue;
-
-      fail_device:
-        if (device) {
-            av_free(device->device_name);
-            av_free(device->device_description);
-            av_freep(&device);
-        }
-        if (fd >= 0) {
-            close(fd);
-            fd = -1;
-        }
-        if (ret < 0)
-            return ret;
-    }
-    return 0;
+    return ff_fbdev_get_device_list(device_list);
 }
 
 #define OFFSET(x) offsetof(FBDevContext, x)

libavdevice/pulse_audio_enc.c

@@ -38,6 +38,8 @@ typedef struct PulseData {
     int64_t timestamp;
     int buffer_size;               /**< Buffer size in bytes */
     int buffer_duration;           /**< Buffer size in ms, recalculated to buffer_size */
+    int prebuf;
+    int minreq;
     int last_result;
     pa_threaded_mainloop *mainloop;
     pa_context *ctx;
@@ -475,6 +477,10 @@ static av_cold int pulse_write_header(AVFormatContext *h)
         av_log(s, AV_LOG_DEBUG, "Real buffer length is %u bytes\n", buffer_attributes.tlength);
     } else if (s->buffer_size)
         buffer_attributes.tlength = s->buffer_size;
+    if (s->prebuf)
+        buffer_attributes.prebuf = s->prebuf;
+    if (s->minreq)
+        buffer_attributes.minreq = s->minreq;
 
     sample_spec.format = ff_codec_id_to_pulse_format(st->codec->codec_id);
     sample_spec.rate = st->codec->sample_rate;
@@ -578,6 +584,14 @@ static av_cold int pulse_write_header(AVFormatContext *h)
         goto fail;
     }
 
+    /* read back buffer attributes for future use */
+    buffer_attributes = *pa_stream_get_buffer_attr(s->stream);
+    s->buffer_size = buffer_attributes.tlength;
+    s->prebuf = buffer_attributes.prebuf;
+    s->minreq = buffer_attributes.minreq;
+    av_log(s, AV_LOG_DEBUG, "Real buffer attributes: size: %d, prebuf: %d, minreq: %d\n",
+           s->buffer_size, s->prebuf, s->minreq);
+
     pa_threaded_mainloop_unlock(s->mainloop);
 
     if ((ret = pulse_subscribe_events(s)) < 0) {
@@ -610,6 +624,7 @@ static int pulse_write_packet(AVFormatContext *h, AVPacket *pkt)
 {
     PulseData *s = h->priv_data;
     int ret;
+    int64_t writable_size;
 
     if (!pkt)
         return pulse_flash_stream(s);
@@ -632,7 +647,7 @@ static int pulse_write_packet(AVFormatContext *h, AVPacket *pkt)
         av_log(s, AV_LOG_ERROR, "PulseAudio stream is in invalid state.\n");
         goto fail;
     }
-    while (!pa_stream_writable_size(s->stream)) {
+    while (pa_stream_writable_size(s->stream) < s->minreq) {
         if (s->nonblocking) {
             pa_threaded_mainloop_unlock(s->mainloop);
             return AVERROR(EAGAIN);
@@ -644,6 +659,9 @@ static int pulse_write_packet(AVFormatContext *h, AVPacket *pkt)
         av_log(s, AV_LOG_ERROR, "pa_stream_write failed: %s\n", pa_strerror(ret));
         goto fail;
     }
+    if ((writable_size = pa_stream_writable_size(s->stream)) >= s->minreq)
+        avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_WRITABLE, &writable_size, sizeof(writable_size));
+
     pa_threaded_mainloop_unlock(s->mainloop);
 
     return 0;
@@ -678,8 +696,10 @@ static void pulse_get_output_timestamp(AVFormatContext *h, int stream, int64_t *
     pa_threaded_mainloop_lock(s->mainloop);
     pa_stream_get_latency(s->stream, &latency, &neg);
     pa_threaded_mainloop_unlock(s->mainloop);
-    *wall = av_gettime();
-    *dts = s->timestamp - (neg ? -latency : latency);
+    if (wall)
+        *wall = av_gettime();
+    if (dts)
+        *dts = s->timestamp - (neg ? -latency : latency);
 }
 
 static int pulse_get_device_list(AVFormatContext *h, AVDeviceInfoList *device_list)
@@ -745,6 +765,8 @@ static const AVOption options[] = {
     { "device",          "set device name",                  OFFSET(device),          AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
     { "buffer_size",     "set buffer size in bytes",         OFFSET(buffer_size),     AV_OPT_TYPE_INT,    {.i64 = 0}, 0, INT_MAX, E },
     { "buffer_duration", "set buffer duration in millisecs", OFFSET(buffer_duration), AV_OPT_TYPE_INT,    {.i64 = 0}, 0, INT_MAX, E },
+    { "prebuf",          "set pre-buffering size",           OFFSET(prebuf),          AV_OPT_TYPE_INT,    {.i64 = 0}, 0, INT_MAX, E },
+    { "minreq",          "set minimum request size",         OFFSET(minreq),          AV_OPT_TYPE_INT,    {.i64 = 0}, 0, INT_MAX, E },
     { NULL }
 };