[FFmpeg-cvslog] ffmpeg: Generic device setup
Mark Thompson
git at videolan.org
Thu Jun 15 00:38:44 EEST 2017
ffmpeg | branch: master | Mark Thompson <sw at jkqxz.net> | Sat Mar 4 23:57:30 2017 +0000| [06043cc0bc72b530db352a67776392cf61a54104] | committer: Mark Thompson
ffmpeg: Generic device setup
Not yet enabled for any hwaccels.
(cherry picked from commit d2e6dd32a445b5744a51d090c0822dbd7e434592)
(cherry picked from commit 9203aac22874c7259e155b7d00f1f33bb1355129)
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=06043cc0bc72b530db352a67776392cf61a54104
---
Makefile | 2 +-
ffmpeg.c | 18 +++
ffmpeg.h | 17 +++
ffmpeg_hw.c | 384 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
ffmpeg_opt.c | 39 ++++--
5 files changed, 452 insertions(+), 8 deletions(-)
diff --git a/Makefile b/Makefile
index a2df8b9d8d..913a890a78 100644
--- a/Makefile
+++ b/Makefile
@@ -31,7 +31,7 @@ ALLAVPROGS_G = $(AVBASENAMES:%=%$(PROGSSUF)_g$(EXESUF))
$(foreach prog,$(AVBASENAMES),$(eval OBJS-$(prog) += cmdutils.o))
$(foreach prog,$(AVBASENAMES),$(eval OBJS-$(prog)-$(CONFIG_OPENCL) += cmdutils_opencl.o))
-OBJS-ffmpeg += ffmpeg_opt.o ffmpeg_filter.o
+OBJS-ffmpeg += ffmpeg_opt.o ffmpeg_filter.o ffmpeg_hw.o
OBJS-ffmpeg-$(CONFIG_VIDEOTOOLBOX) += ffmpeg_videotoolbox.o
OBJS-ffmpeg-$(CONFIG_LIBMFX) += ffmpeg_qsv.o
OBJS-ffmpeg-$(CONFIG_VAAPI) += ffmpeg_vaapi.o
diff --git a/ffmpeg.c b/ffmpeg.c
index cd19594f8b..6170bd453c 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -2884,6 +2884,15 @@ static int init_input_stream(int ist_index, char *error, int error_len)
if (!av_dict_get(ist->decoder_opts, "threads", NULL, 0))
av_dict_set(&ist->decoder_opts, "threads", "auto", 0);
+
+ ret = hw_device_setup_for_decode(ist);
+ if (ret < 0) {
+ snprintf(error, error_len, "Device setup failed for "
+ "decoder on input stream #%d:%d : %s",
+ ist->file_index, ist->st->index, av_err2str(ret));
+ return ret;
+ }
+
if ((ret = avcodec_open2(ist->dec_ctx, codec, &ist->decoder_opts)) < 0) {
if (ret == AVERROR_EXPERIMENTAL)
abort_codec_experimental(codec, 0);
@@ -3441,6 +3450,14 @@ static int init_output_stream(OutputStream *ost, char *error, int error_len)
ost->enc_ctx->hw_frames_ctx = av_buffer_ref(av_buffersink_get_hw_frames_ctx(ost->filter->filter));
if (!ost->enc_ctx->hw_frames_ctx)
return AVERROR(ENOMEM);
+ } else {
+ ret = hw_device_setup_for_encode(ost);
+ if (ret < 0) {
+ snprintf(error, error_len, "Device setup failed for "
+ "encoder on output stream #%d:%d : %s",
+ ost->file_index, ost->index, av_err2str(ret));
+ return ret;
+ }
}
if ((ret = avcodec_open2(ost->enc_ctx, codec, &ost->encoder_opts)) < 0) {
@@ -4643,6 +4660,7 @@ static int transcode(void)
}
av_buffer_unref(&hw_device_ctx);
+ hw_device_free_all();
/* finished ! */
ret = 0;
diff --git a/ffmpeg.h b/ffmpeg.h
index a806445e0d..5c115cf9a3 100644
--- a/ffmpeg.h
+++ b/ffmpeg.h
@@ -42,6 +42,7 @@
#include "libavutil/dict.h"
#include "libavutil/eval.h"
#include "libavutil/fifo.h"
+#include "libavutil/hwcontext.h"
#include "libavutil/pixfmt.h"
#include "libavutil/rational.h"
#include "libavutil/threadmessage.h"
@@ -74,8 +75,15 @@ typedef struct HWAccel {
int (*init)(AVCodecContext *s);
enum HWAccelID id;
enum AVPixelFormat pix_fmt;
+ enum AVHWDeviceType device_type;
} HWAccel;
+typedef struct HWDevice {
+ char *name;
+ enum AVHWDeviceType type;
+ AVBufferRef *device_ref;
+} HWDevice;
+
/* select an input stream for an output stream */
typedef struct StreamMap {
int disabled; /* 1 is this mapping is disabled by a negative map */
@@ -661,4 +669,13 @@ int vaapi_decode_init(AVCodecContext *avctx);
int vaapi_device_init(const char *device);
int cuvid_init(AVCodecContext *s);
+HWDevice *hw_device_get_by_name(const char *name);
+int hw_device_init_from_string(const char *arg, HWDevice **dev);
+void hw_device_free_all(void);
+
+int hw_device_setup_for_decode(InputStream *ist);
+int hw_device_setup_for_encode(OutputStream *ost);
+
+int hwaccel_decode_init(AVCodecContext *avctx);
+
#endif /* FFMPEG_H */
diff --git a/ffmpeg_hw.c b/ffmpeg_hw.c
new file mode 100644
index 0000000000..5708e9af20
--- /dev/null
+++ b/ffmpeg_hw.c
@@ -0,0 +1,384 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+
+#include "libavutil/avstring.h"
+
+#include "ffmpeg.h"
+
+static int nb_hw_devices;
+static HWDevice **hw_devices;
+
+static HWDevice *hw_device_get_by_type(enum AVHWDeviceType type)
+{
+ HWDevice *found = NULL;
+ int i;
+ for (i = 0; i < nb_hw_devices; i++) {
+ if (hw_devices[i]->type == type) {
+ if (found)
+ return NULL;
+ found = hw_devices[i];
+ }
+ }
+ return found;
+}
+
+HWDevice *hw_device_get_by_name(const char *name)
+{
+ int i;
+ for (i = 0; i < nb_hw_devices; i++) {
+ if (!strcmp(hw_devices[i]->name, name))
+ return hw_devices[i];
+ }
+ return NULL;
+}
+
+static HWDevice *hw_device_add(void)
+{
+ int err;
+ err = av_reallocp_array(&hw_devices, nb_hw_devices + 1,
+ sizeof(*hw_devices));
+ if (err) {
+ nb_hw_devices = 0;
+ return NULL;
+ }
+ hw_devices[nb_hw_devices] = av_mallocz(sizeof(HWDevice));
+ if (!hw_devices[nb_hw_devices])
+ return NULL;
+ return hw_devices[nb_hw_devices++];
+}
+
+int hw_device_init_from_string(const char *arg, HWDevice **dev_out)
+{
+ // "type=name:device,key=value,key2=value2"
+ // "type:device,key=value,key2=value2"
+ // -> av_hwdevice_ctx_create()
+ // "type=name at name"
+ // "type at name"
+ // -> av_hwdevice_ctx_create_derived()
+
+ AVDictionary *options = NULL;
+ char *type_name = NULL, *name = NULL, *device = NULL;
+ enum AVHWDeviceType type;
+ HWDevice *dev, *src;
+ AVBufferRef *device_ref;
+ int err;
+ const char *errmsg, *p, *q;
+ size_t k;
+
+ k = strcspn(arg, ":=@");
+ p = arg + k;
+
+ type_name = av_strndup(arg, k);
+ if (!type_name) {
+ err = AVERROR(ENOMEM);
+ goto fail;
+ }
+ type = av_hwdevice_find_type_by_name(type_name);
+ if (type == AV_HWDEVICE_TYPE_NONE) {
+ errmsg = "unknown device type";
+ goto invalid;
+ }
+
+ if (*p == '=') {
+ k = strcspn(p + 1, ":@");
+
+ name = av_strndup(p + 1, k);
+ if (!name) {
+ err = AVERROR(ENOMEM);
+ goto fail;
+ }
+ if (hw_device_get_by_name(name)) {
+ errmsg = "named device already exists";
+ goto invalid;
+ }
+
+ p += 1 + k;
+ } else {
+ // Give the device an automatic name of the form "type%d".
+ // We arbitrarily limit at 1000 anonymous devices of the same
+ // type - there is probably something else very wrong if you
+ // get to this limit.
+ size_t index_pos;
+ int index, index_limit = 1000;
+ index_pos = strlen(type_name);
+ name = av_malloc(index_pos + 4);
+ if (!name) {
+ err = AVERROR(ENOMEM);
+ goto fail;
+ }
+ for (index = 0; index < index_limit; index++) {
+ snprintf(name, index_pos + 4, "%s%d", type_name, index);
+ if (!hw_device_get_by_name(name))
+ break;
+ }
+ if (index >= index_limit) {
+ errmsg = "too many devices";
+ goto invalid;
+ }
+ }
+
+ if (!*p) {
+ // New device with no parameters.
+ err = av_hwdevice_ctx_create(&device_ref, type,
+ NULL, NULL, 0);
+ if (err < 0)
+ goto fail;
+
+ } else if (*p == ':') {
+ // New device with some parameters.
+ ++p;
+ q = strchr(p, ',');
+ if (q) {
+ device = av_strndup(p, q - p);
+ if (!device) {
+ err = AVERROR(ENOMEM);
+ goto fail;
+ }
+ err = av_dict_parse_string(&options, q + 1, "=", ",", 0);
+ if (err < 0) {
+ errmsg = "failed to parse options";
+ goto invalid;
+ }
+ }
+
+ err = av_hwdevice_ctx_create(&device_ref, type,
+ device ? device : p, options, 0);
+ if (err < 0)
+ goto fail;
+
+ } else if (*p == '@') {
+ // Derive from existing device.
+
+ src = hw_device_get_by_name(p + 1);
+ if (!src) {
+ errmsg = "invalid source device name";
+ goto invalid;
+ }
+
+ err = av_hwdevice_ctx_create_derived(&device_ref, type,
+ src->device_ref, 0);
+ if (err < 0)
+ goto fail;
+ } else {
+ errmsg = "parse error";
+ goto invalid;
+ }
+
+ dev = hw_device_add();
+ if (!dev) {
+ err = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ dev->name = name;
+ dev->type = type;
+ dev->device_ref = device_ref;
+
+ if (dev_out)
+ *dev_out = dev;
+
+ name = NULL;
+ err = 0;
+done:
+ av_freep(&type_name);
+ av_freep(&name);
+ av_freep(&device);
+ av_dict_free(&options);
+ return err;
+invalid:
+ av_log(NULL, AV_LOG_ERROR,
+ "Invalid device specification \"%s\": %s\n", arg, errmsg);
+ err = AVERROR(EINVAL);
+ goto done;
+fail:
+ av_log(NULL, AV_LOG_ERROR,
+ "Device creation failed: %d.\n", err);
+ goto done;
+}
+
+void hw_device_free_all(void)
+{
+ int i;
+ for (i = 0; i < nb_hw_devices; i++) {
+ av_freep(&hw_devices[i]->name);
+ av_buffer_unref(&hw_devices[i]->device_ref);
+ av_freep(&hw_devices[i]);
+ }
+ av_freep(&hw_devices);
+ nb_hw_devices = 0;
+}
+
+static enum AVHWDeviceType hw_device_match_type_by_hwaccel(enum HWAccelID hwaccel_id)
+{
+ int i;
+ if (hwaccel_id == HWACCEL_NONE)
+ return AV_HWDEVICE_TYPE_NONE;
+ for (i = 0; hwaccels[i].name; i++) {
+ if (hwaccels[i].id == hwaccel_id)
+ return hwaccels[i].device_type;
+ }
+ return AV_HWDEVICE_TYPE_NONE;
+}
+
+static enum AVHWDeviceType hw_device_match_type_in_name(const char *codec_name)
+{
+ const char *type_name;
+ enum AVHWDeviceType type;
+ for (type = av_hwdevice_iterate_types(AV_HWDEVICE_TYPE_NONE);
+ type != AV_HWDEVICE_TYPE_NONE;
+ type = av_hwdevice_iterate_types(type)) {
+ type_name = av_hwdevice_get_type_name(type);
+ if (strstr(codec_name, type_name))
+ return type;
+ }
+ return AV_HWDEVICE_TYPE_NONE;
+}
+
+int hw_device_setup_for_decode(InputStream *ist)
+{
+ enum AVHWDeviceType type;
+ HWDevice *dev;
+ int err;
+
+ if (ist->hwaccel_device) {
+ dev = hw_device_get_by_name(ist->hwaccel_device);
+ if (!dev) {
+ char *tmp;
+ type = hw_device_match_type_by_hwaccel(ist->hwaccel_id);
+ if (type == AV_HWDEVICE_TYPE_NONE) {
+ // No match - this isn't necessarily invalid, though,
+ // because an explicit device might not be needed or
+ // the hwaccel setup could be handled elsewhere.
+ return 0;
+ }
+ tmp = av_asprintf("%s:%s", av_hwdevice_get_type_name(type),
+ ist->hwaccel_device);
+ if (!tmp)
+ return AVERROR(ENOMEM);
+ err = hw_device_init_from_string(tmp, &dev);
+ av_free(tmp);
+ if (err < 0)
+ return err;
+ }
+ } else {
+ if (ist->hwaccel_id != HWACCEL_NONE)
+ type = hw_device_match_type_by_hwaccel(ist->hwaccel_id);
+ else
+ type = hw_device_match_type_in_name(ist->dec->name);
+ if (type != AV_HWDEVICE_TYPE_NONE) {
+ dev = hw_device_get_by_type(type);
+ if (!dev) {
+ hw_device_init_from_string(av_hwdevice_get_type_name(type),
+ &dev);
+ }
+ } else {
+ // No device required.
+ return 0;
+ }
+ }
+
+ if (!dev) {
+ av_log(ist->dec_ctx, AV_LOG_WARNING, "No device available "
+ "for decoder (device type %s for codec %s).\n",
+ av_hwdevice_get_type_name(type), ist->dec->name);
+ return 0;
+ }
+
+ ist->dec_ctx->hw_device_ctx = av_buffer_ref(dev->device_ref);
+ if (!ist->dec_ctx->hw_device_ctx)
+ return AVERROR(ENOMEM);
+
+ return 0;
+}
+
+int hw_device_setup_for_encode(OutputStream *ost)
+{
+ enum AVHWDeviceType type;
+ HWDevice *dev;
+
+ type = hw_device_match_type_in_name(ost->enc->name);
+ if (type != AV_HWDEVICE_TYPE_NONE) {
+ dev = hw_device_get_by_type(type);
+ if (!dev) {
+ av_log(ost->enc_ctx, AV_LOG_WARNING, "No device available "
+ "for encoder (device type %s for codec %s).\n",
+ av_hwdevice_get_type_name(type), ost->enc->name);
+ return 0;
+ }
+ ost->enc_ctx->hw_device_ctx = av_buffer_ref(dev->device_ref);
+ if (!ost->enc_ctx->hw_device_ctx)
+ return AVERROR(ENOMEM);
+ return 0;
+ } else {
+ // No device required.
+ return 0;
+ }
+}
+
+static int hwaccel_retrieve_data(AVCodecContext *avctx, AVFrame *input)
+{
+ InputStream *ist = avctx->opaque;
+ AVFrame *output = NULL;
+ enum AVPixelFormat output_format = ist->hwaccel_output_format;
+ int err;
+
+ if (input->format == output_format) {
+ // Nothing to do.
+ return 0;
+ }
+
+ output = av_frame_alloc();
+ if (!output)
+ return AVERROR(ENOMEM);
+
+ output->format = output_format;
+
+ err = av_hwframe_transfer_data(output, input, 0);
+ if (err < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to transfer data to "
+ "output frame: %d.\n", err);
+ goto fail;
+ }
+
+ err = av_frame_copy_props(output, input);
+ if (err < 0) {
+ av_frame_unref(output);
+ goto fail;
+ }
+
+ av_frame_unref(input);
+ av_frame_move_ref(input, output);
+ av_frame_free(&output);
+
+ return 0;
+
+fail:
+ av_frame_free(&output);
+ return err;
+}
+
+int hwaccel_decode_init(AVCodecContext *avctx)
+{
+ InputStream *ist = avctx->opaque;
+
+ ist->hwaccel_retrieve_data = &hwaccel_retrieve_data;
+
+ return 0;
+}
diff --git a/ffmpeg_opt.c b/ffmpeg_opt.c
index c997ea8faf..6755e09e47 100644
--- a/ffmpeg_opt.c
+++ b/ffmpeg_opt.c
@@ -67,25 +67,32 @@
const HWAccel hwaccels[] = {
#if HAVE_VDPAU_X11
- { "vdpau", vdpau_init, HWACCEL_VDPAU, AV_PIX_FMT_VDPAU },
+ { "vdpau", vdpau_init, HWACCEL_VDPAU, AV_PIX_FMT_VDPAU,
+ AV_HWDEVICE_TYPE_NONE },
#endif
#if HAVE_DXVA2_LIB
- { "dxva2", dxva2_init, HWACCEL_DXVA2, AV_PIX_FMT_DXVA2_VLD },
+ { "dxva2", dxva2_init, HWACCEL_DXVA2, AV_PIX_FMT_DXVA2_VLD,
+ AV_HWDEVICE_TYPE_NONE },
#endif
#if CONFIG_VDA
- { "vda", videotoolbox_init, HWACCEL_VDA, AV_PIX_FMT_VDA },
+ { "vda", videotoolbox_init, HWACCEL_VDA, AV_PIX_FMT_VDA,
+ AV_HWDEVICE_TYPE_NONE },
#endif
#if CONFIG_VIDEOTOOLBOX
- { "videotoolbox", videotoolbox_init, HWACCEL_VIDEOTOOLBOX, AV_PIX_FMT_VIDEOTOOLBOX },
+ { "videotoolbox", videotoolbox_init, HWACCEL_VIDEOTOOLBOX, AV_PIX_FMT_VIDEOTOOLBOX,
+ AV_HWDEVICE_TYPE_NONE },
#endif
#if CONFIG_LIBMFX
- { "qsv", qsv_init, HWACCEL_QSV, AV_PIX_FMT_QSV },
+ { "qsv", qsv_init, HWACCEL_QSV, AV_PIX_FMT_QSV,
+ AV_HWDEVICE_TYPE_NONE },
#endif
#if CONFIG_VAAPI
- { "vaapi", vaapi_decode_init, HWACCEL_VAAPI, AV_PIX_FMT_VAAPI },
+ { "vaapi", vaapi_decode_init, HWACCEL_VAAPI, AV_PIX_FMT_VAAPI,
+ AV_HWDEVICE_TYPE_NONE },
#endif
#if CONFIG_CUVID
- { "cuvid", cuvid_init, HWACCEL_CUVID, AV_PIX_FMT_CUDA },
+ { "cuvid", cuvid_init, HWACCEL_CUVID, AV_PIX_FMT_CUDA,
+ AV_HWDEVICE_TYPE_NONE },
#endif
{ 0 },
};
@@ -463,6 +470,21 @@ static int opt_vaapi_device(void *optctx, const char *opt, const char *arg)
}
#endif
+static int opt_init_hw_device(void *optctx, const char *opt, const char *arg)
+{
+ if (!strcmp(arg, "list")) {
+ enum AVHWDeviceType type = AV_HWDEVICE_TYPE_NONE;
+ printf("Supported hardware device types:\n");
+ while ((type = av_hwdevice_iterate_types(type)) !=
+ AV_HWDEVICE_TYPE_NONE)
+ printf("%s\n", av_hwdevice_get_type_name(type));
+ printf("\n");
+ exit_program(0);
+ } else {
+ return hw_device_init_from_string(arg, NULL);
+ }
+}
+
/**
* Parse a metadata specifier passed as 'arg' parameter.
* @param arg metadata string to parse
@@ -3674,5 +3696,8 @@ const OptionDef options[] = {
"set QSV hardware device (DirectX adapter index, DRM path or X11 display name)", "device"},
#endif
+ { "init_hw_device", HAS_ARG | OPT_EXPERT, { .func_arg = opt_init_hw_device },
+ "initialise hardware device", "args" },
+
{ NULL, },
};
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