552 lines
16 KiB
C
552 lines
16 KiB
C
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <string.h>
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#include "libavutil/avstring.h"
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#include "libavutil/pixdesc.h"
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#include "libavfilter/buffersink.h"
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#include "ffmpeg.h"
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static int nb_hw_devices;
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static HWDevice **hw_devices;
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static HWDevice *hw_device_get_by_type(enum AVHWDeviceType type)
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{
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HWDevice *found = NULL;
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int i;
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for (i = 0; i < nb_hw_devices; i++) {
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if (hw_devices[i]->type == type) {
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if (found)
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return NULL;
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found = hw_devices[i];
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}
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}
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return found;
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}
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HWDevice *hw_device_get_by_name(const char *name)
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{
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int i;
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for (i = 0; i < nb_hw_devices; i++) {
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if (!strcmp(hw_devices[i]->name, name))
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return hw_devices[i];
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}
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return NULL;
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}
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static HWDevice *hw_device_add(void)
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{
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int err;
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err = av_reallocp_array(&hw_devices, nb_hw_devices + 1,
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sizeof(*hw_devices));
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if (err) {
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nb_hw_devices = 0;
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return NULL;
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}
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hw_devices[nb_hw_devices] = av_mallocz(sizeof(HWDevice));
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if (!hw_devices[nb_hw_devices])
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return NULL;
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return hw_devices[nb_hw_devices++];
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}
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static char *hw_device_default_name(enum AVHWDeviceType type)
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{
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// Make an automatic name of the form "type%d". We arbitrarily
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// limit at 1000 anonymous devices of the same type - there is
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// probably something else very wrong if you get to this limit.
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const char *type_name = av_hwdevice_get_type_name(type);
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char *name;
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size_t index_pos;
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int index, index_limit = 1000;
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index_pos = strlen(type_name);
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name = av_malloc(index_pos + 4);
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if (!name)
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return NULL;
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for (index = 0; index < index_limit; index++) {
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snprintf(name, index_pos + 4, "%s%d", type_name, index);
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if (!hw_device_get_by_name(name))
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break;
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}
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if (index >= index_limit) {
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av_freep(&name);
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return NULL;
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}
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return name;
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}
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int hw_device_init_from_string(const char *arg, HWDevice **dev_out)
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{
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// "type=name:device,key=value,key2=value2"
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// "type:device,key=value,key2=value2"
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// -> av_hwdevice_ctx_create()
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// "type=name@name"
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// "type@name"
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// -> av_hwdevice_ctx_create_derived()
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AVDictionary *options = NULL;
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const char *type_name = NULL, *name = NULL, *device = NULL;
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enum AVHWDeviceType type;
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HWDevice *dev, *src;
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AVBufferRef *device_ref = NULL;
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int err;
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const char *errmsg, *p, *q;
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size_t k;
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k = strcspn(arg, ":=@");
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p = arg + k;
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type_name = av_strndup(arg, k);
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if (!type_name) {
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err = AVERROR(ENOMEM);
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goto fail;
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}
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type = av_hwdevice_find_type_by_name(type_name);
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if (type == AV_HWDEVICE_TYPE_NONE) {
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errmsg = "unknown device type";
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goto invalid;
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}
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if (*p == '=') {
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k = strcspn(p + 1, ":@");
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name = av_strndup(p + 1, k);
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if (!name) {
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err = AVERROR(ENOMEM);
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goto fail;
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}
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if (hw_device_get_by_name(name)) {
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errmsg = "named device already exists";
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goto invalid;
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}
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p += 1 + k;
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} else {
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name = hw_device_default_name(type);
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if (!name) {
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err = AVERROR(ENOMEM);
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goto fail;
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}
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}
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if (!*p) {
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// New device with no parameters.
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err = av_hwdevice_ctx_create(&device_ref, type,
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NULL, NULL, 0);
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if (err < 0)
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goto fail;
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} else if (*p == ':') {
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// New device with some parameters.
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++p;
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q = strchr(p, ',');
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if (q) {
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if (q - p > 0) {
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device = av_strndup(p, q - p);
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if (!device) {
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err = AVERROR(ENOMEM);
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goto fail;
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}
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}
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err = av_dict_parse_string(&options, q + 1, "=", ",", 0);
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if (err < 0) {
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errmsg = "failed to parse options";
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goto invalid;
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}
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}
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err = av_hwdevice_ctx_create(&device_ref, type,
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q ? device : p[0] ? p : NULL,
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options, 0);
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if (err < 0)
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goto fail;
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} else if (*p == '@') {
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// Derive from existing device.
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src = hw_device_get_by_name(p + 1);
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if (!src) {
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errmsg = "invalid source device name";
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goto invalid;
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}
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err = av_hwdevice_ctx_create_derived(&device_ref, type,
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src->device_ref, 0);
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if (err < 0)
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goto fail;
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} else {
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errmsg = "parse error";
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goto invalid;
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}
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dev = hw_device_add();
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if (!dev) {
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err = AVERROR(ENOMEM);
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goto fail;
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}
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dev->name = name;
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dev->type = type;
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dev->device_ref = device_ref;
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if (dev_out)
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*dev_out = dev;
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name = NULL;
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err = 0;
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done:
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av_freep(&type_name);
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av_freep(&name);
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av_freep(&device);
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av_dict_free(&options);
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return err;
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invalid:
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av_log(NULL, AV_LOG_ERROR,
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"Invalid device specification \"%s\": %s\n", arg, errmsg);
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err = AVERROR(EINVAL);
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goto done;
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fail:
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av_log(NULL, AV_LOG_ERROR,
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"Device creation failed: %d.\n", err);
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av_buffer_unref(&device_ref);
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goto done;
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}
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static int hw_device_init_from_type(enum AVHWDeviceType type,
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const char *device,
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HWDevice **dev_out)
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{
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AVBufferRef *device_ref = NULL;
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HWDevice *dev;
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char *name;
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int err;
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name = hw_device_default_name(type);
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if (!name) {
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err = AVERROR(ENOMEM);
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goto fail;
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}
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err = av_hwdevice_ctx_create(&device_ref, type, device, NULL, 0);
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if (err < 0) {
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av_log(NULL, AV_LOG_ERROR,
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"Device creation failed: %d.\n", err);
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goto fail;
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}
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dev = hw_device_add();
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if (!dev) {
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err = AVERROR(ENOMEM);
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goto fail;
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}
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dev->name = name;
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dev->type = type;
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dev->device_ref = device_ref;
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if (dev_out)
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*dev_out = dev;
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return 0;
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fail:
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av_freep(&name);
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av_buffer_unref(&device_ref);
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return err;
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}
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void hw_device_free_all(void)
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{
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int i;
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for (i = 0; i < nb_hw_devices; i++) {
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av_freep(&hw_devices[i]->name);
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av_buffer_unref(&hw_devices[i]->device_ref);
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av_freep(&hw_devices[i]);
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}
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av_freep(&hw_devices);
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nb_hw_devices = 0;
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}
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static HWDevice *hw_device_match_by_codec(const AVCodec *codec)
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{
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const AVCodecHWConfig *config;
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HWDevice *dev;
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int i;
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for (i = 0;; i++) {
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config = avcodec_get_hw_config(codec, i);
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if (!config)
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return NULL;
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if (!(config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX))
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continue;
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dev = hw_device_get_by_type(config->device_type);
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if (dev)
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return dev;
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}
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}
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int hw_device_setup_for_decode(InputStream *ist)
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{
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const AVCodecHWConfig *config;
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enum AVHWDeviceType type;
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HWDevice *dev = NULL;
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int err, auto_device = 0;
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if (ist->hwaccel_device) {
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dev = hw_device_get_by_name(ist->hwaccel_device);
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if (!dev) {
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if (ist->hwaccel_id == HWACCEL_AUTO) {
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auto_device = 1;
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} else if (ist->hwaccel_id == HWACCEL_GENERIC) {
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type = ist->hwaccel_device_type;
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err = hw_device_init_from_type(type, ist->hwaccel_device,
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&dev);
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} else {
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// This will be dealt with by API-specific initialisation
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// (using hwaccel_device), so nothing further needed here.
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return 0;
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}
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} else {
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if (ist->hwaccel_id == HWACCEL_AUTO) {
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ist->hwaccel_device_type = dev->type;
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} else if (ist->hwaccel_device_type != dev->type) {
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av_log(ist->dec_ctx, AV_LOG_ERROR, "Invalid hwaccel device "
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"specified for decoder: device %s of type %s is not "
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"usable with hwaccel %s.\n", dev->name,
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av_hwdevice_get_type_name(dev->type),
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av_hwdevice_get_type_name(ist->hwaccel_device_type));
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return AVERROR(EINVAL);
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}
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}
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} else {
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if (ist->hwaccel_id == HWACCEL_AUTO) {
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auto_device = 1;
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} else if (ist->hwaccel_id == HWACCEL_GENERIC) {
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type = ist->hwaccel_device_type;
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dev = hw_device_get_by_type(type);
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if (!dev)
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err = hw_device_init_from_type(type, NULL, &dev);
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} else {
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dev = hw_device_match_by_codec(ist->dec);
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if (!dev) {
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// No device for this codec, but not using generic hwaccel
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// and therefore may well not need one - ignore.
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return 0;
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}
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}
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}
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if (auto_device) {
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int i;
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if (!avcodec_get_hw_config(ist->dec, 0)) {
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// Decoder does not support any hardware devices.
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return 0;
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}
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for (i = 0; !dev; i++) {
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config = avcodec_get_hw_config(ist->dec, i);
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if (!config)
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break;
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type = config->device_type;
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dev = hw_device_get_by_type(type);
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if (dev) {
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av_log(ist->dec_ctx, AV_LOG_INFO, "Using auto "
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"hwaccel type %s with existing device %s.\n",
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av_hwdevice_get_type_name(type), dev->name);
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}
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}
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for (i = 0; !dev; i++) {
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config = avcodec_get_hw_config(ist->dec, i);
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if (!config)
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break;
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type = config->device_type;
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// Try to make a new device of this type.
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err = hw_device_init_from_type(type, ist->hwaccel_device,
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&dev);
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if (err < 0) {
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// Can't make a device of this type.
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continue;
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}
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if (ist->hwaccel_device) {
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av_log(ist->dec_ctx, AV_LOG_INFO, "Using auto "
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"hwaccel type %s with new device created "
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|
|
"from %s.\n", av_hwdevice_get_type_name(type),
|
||
|
|
ist->hwaccel_device);
|
||
|
|
} else {
|
||
|
|
av_log(ist->dec_ctx, AV_LOG_INFO, "Using auto "
|
||
|
|
"hwaccel type %s with new default device.\n",
|
||
|
|
av_hwdevice_get_type_name(type));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (dev) {
|
||
|
|
ist->hwaccel_device_type = type;
|
||
|
|
} else {
|
||
|
|
av_log(ist->dec_ctx, AV_LOG_INFO, "Auto hwaccel "
|
||
|
|
"disabled: no device found.\n");
|
||
|
|
ist->hwaccel_id = HWACCEL_NONE;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!dev) {
|
||
|
|
av_log(ist->dec_ctx, AV_LOG_ERROR, "No device available "
|
||
|
|
"for decoder: device type %s needed for codec %s.\n",
|
||
|
|
av_hwdevice_get_type_name(type), ist->dec->name);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
const AVCodecHWConfig *config;
|
||
|
|
HWDevice *dev = NULL;
|
||
|
|
AVBufferRef *frames_ref = NULL;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (ost->filter) {
|
||
|
|
frames_ref = av_buffersink_get_hw_frames_ctx(ost->filter->filter);
|
||
|
|
if (frames_ref &&
|
||
|
|
((AVHWFramesContext*)frames_ref->data)->format ==
|
||
|
|
ost->enc_ctx->pix_fmt) {
|
||
|
|
// Matching format, will try to use hw_frames_ctx.
|
||
|
|
} else {
|
||
|
|
frames_ref = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0;; i++) {
|
||
|
|
config = avcodec_get_hw_config(ost->enc, i);
|
||
|
|
if (!config)
|
||
|
|
break;
|
||
|
|
|
||
|
|
if (frames_ref &&
|
||
|
|
config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX &&
|
||
|
|
(config->pix_fmt == AV_PIX_FMT_NONE ||
|
||
|
|
config->pix_fmt == ost->enc_ctx->pix_fmt)) {
|
||
|
|
av_log(ost->enc_ctx, AV_LOG_VERBOSE, "Using input "
|
||
|
|
"frames context (format %s) with %s encoder.\n",
|
||
|
|
av_get_pix_fmt_name(ost->enc_ctx->pix_fmt),
|
||
|
|
ost->enc->name);
|
||
|
|
ost->enc_ctx->hw_frames_ctx = av_buffer_ref(frames_ref);
|
||
|
|
if (!ost->enc_ctx->hw_frames_ctx)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!dev &&
|
||
|
|
config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX)
|
||
|
|
dev = hw_device_get_by_type(config->device_type);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (dev) {
|
||
|
|
av_log(ost->enc_ctx, AV_LOG_VERBOSE, "Using device %s "
|
||
|
|
"(type %s) with %s encoder.\n", dev->name,
|
||
|
|
av_hwdevice_get_type_name(dev->type), ost->enc->name);
|
||
|
|
ost->enc_ctx->hw_device_ctx = av_buffer_ref(dev->device_ref);
|
||
|
|
if (!ost->enc_ctx->hw_device_ctx)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
} else {
|
||
|
|
// No device required, or no device available.
|
||
|
|
}
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
int hw_device_setup_for_filter(FilterGraph *fg)
|
||
|
|
{
|
||
|
|
HWDevice *dev;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
// If the user has supplied exactly one hardware device then just
|
||
|
|
// give it straight to every filter for convenience. If more than
|
||
|
|
// one device is available then the user needs to pick one explcitly
|
||
|
|
// with the filter_hw_device option.
|
||
|
|
if (filter_hw_device)
|
||
|
|
dev = filter_hw_device;
|
||
|
|
else if (nb_hw_devices == 1)
|
||
|
|
dev = hw_devices[0];
|
||
|
|
else
|
||
|
|
dev = NULL;
|
||
|
|
|
||
|
|
if (dev) {
|
||
|
|
for (i = 0; i < fg->graph->nb_filters; i++) {
|
||
|
|
fg->graph->filters[i]->hw_device_ctx =
|
||
|
|
av_buffer_ref(dev->device_ref);
|
||
|
|
if (!fg->graph->filters[i]->hw_device_ctx)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|