examples/dmabuf-capture: simplify event loop and fix style
This commit is contained in:
emersion
parent
85b6b4b0c8
commit
70d324a0f9
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@ -1,19 +1,17 @@
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#define _XOPEN_SOURCE 700
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#define _POSIX_C_SOURCE 199309L
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#include <libavformat/avformat.h>
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#include <libavutil/display.h>
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#include <libavutil/hwcontext_drm.h>
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#include <libavutil/pixdesc.h>
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#include <poll.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <signal.h>
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#include "wlr-export-dmabuf-unstable-v1-client-protocol.h"
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#include <libavformat/avformat.h>
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#include <libavutil/pixdesc.h>
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#include <libavutil/display.h>
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#include <libavutil/hwcontext_drm.h>
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struct wayland_output {
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struct wl_list link;
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uint32_t id;
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@ -72,7 +70,7 @@ static void output_handle_geometry(void *data, struct wl_output *wl_output,
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int32_t subpixel, const char *make, const char *model,
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int32_t transform) {
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struct wayland_output *output = data;
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output->make = av_strdup(make);
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output->make = av_strdup(make);
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output->model = av_strdup(model);
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}
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@ -80,8 +78,8 @@ static void output_handle_mode(void *data, struct wl_output *wl_output,
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uint32_t flags, int32_t width, int32_t height, int32_t refresh) {
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if (flags & WL_OUTPUT_MODE_CURRENT) {
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struct wayland_output *output = data;
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output->width = width;
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output->height = height;
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output->width = width;
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output->height = height;
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output->framerate = (AVRational){ refresh, 1000 };
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}
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}
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@ -96,10 +94,10 @@ static void output_handle_scale(void* data, struct wl_output *wl_output,
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}
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static const struct wl_output_listener output_listener = {
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output_handle_geometry,
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output_handle_mode,
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output_handle_done,
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output_handle_scale,
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.geometry = output_handle_geometry,
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.mode = output_handle_mode,
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.done = output_handle_done,
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.scale = output_handle_scale,
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};
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static void registry_handle_add(void *data, struct wl_registry *reg,
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@ -109,7 +107,7 @@ static void registry_handle_add(void *data, struct wl_registry *reg,
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if (!strcmp(interface, wl_output_interface.name)) {
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struct wayland_output *output = av_mallocz(sizeof(*output));
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output->id = id;
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output->id = id;
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output->output = wl_registry_bind(reg, id, &wl_output_interface, 1);
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wl_output_add_listener(output->output, &output_listener, output);
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@ -117,8 +115,8 @@ static void registry_handle_add(void *data, struct wl_registry *reg,
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}
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if (!strcmp(interface, zwlr_export_dmabuf_manager_v1_interface.name)) {
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ctx->export_manager = wl_registry_bind(reg, id,
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&zwlr_export_dmabuf_manager_v1_interface, 1);
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ctx->export_manager = wl_registry_bind(reg, id,
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&zwlr_export_dmabuf_manager_v1_interface, 1);
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}
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}
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@ -127,15 +125,16 @@ static void remove_output(struct wayland_output *out) {
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av_free(out->make);
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av_free(out->model);
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av_free(out);
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return;
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}
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static struct wayland_output *find_output(struct capture_context *ctx,
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struct wl_output *out, uint32_t id) {
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struct wayland_output *output, *tmp;
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wl_list_for_each_safe(output, tmp, &ctx->output_list, link)
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if ((output->output == out) || (output->id == id))
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wl_list_for_each_safe(output, tmp, &ctx->output_list, link) {
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if ((output->output == out) || (output->id == id)) {
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return output;
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}
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}
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return NULL;
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}
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@ -145,8 +144,8 @@ static void registry_handle_remove(void *data, struct wl_registry *reg,
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}
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static const struct wl_registry_listener registry_listener = {
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registry_handle_add,
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registry_handle_remove,
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.global = registry_handle_add,
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.global_remove = registry_handle_remove,
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};
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static void frame_free(void *opaque, uint8_t *data) {
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@ -192,7 +191,7 @@ static void frame_start(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
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/* Set base frame properties */
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ctx->current_frame = f;
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f->width = width;
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f->width = width;
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f->height = height;
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f->format = AV_PIX_FMT_DRM_PRIME;
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@ -219,7 +218,7 @@ static void frame_object(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
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AVFrame *f = ctx->current_frame;
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AVDRMFrameDescriptor *desc = (AVDRMFrameDescriptor *)f->data[0];
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desc->objects[index].fd = fd;
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desc->objects[index].fd = fd;
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desc->objects[index].size = size;
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}
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@ -231,8 +230,8 @@ static void frame_plane(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
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AVDRMFrameDescriptor *desc = (AVDRMFrameDescriptor *)f->data[0];
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desc->layers[0].planes[index].object_index = object_index;
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desc->layers[0].planes[index].offset = offset;
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desc->layers[0].planes[index].pitch = stride;
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desc->layers[0].planes[index].offset = offset;
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desc->layers[0].planes[index].pitch = stride;
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}
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static const uint32_t pixfmt_to_drm_map[] = {
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@ -278,10 +277,10 @@ static int attach_drm_frames_ref(struct capture_context *ctx, AVFrame *f,
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hwfc = (AVHWFramesContext*)ctx->drm_frames_ref->data;
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hwfc->format = f->format;
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hwfc->format = f->format;
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hwfc->sw_format = sw_format;
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hwfc->width = f->width;
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hwfc->height = f->height;
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hwfc->width = f->width;
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hwfc->height = f->height;
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err = av_hwframe_ctx_init(ctx->drm_frames_ref);
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if (err) {
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@ -421,30 +420,31 @@ static void frame_cancel(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
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struct capture_context *ctx = data;
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av_log(ctx, AV_LOG_WARNING, "Frame cancelled!\n");
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av_frame_free(&ctx->current_frame);
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if (reason != ZWLR_EXPORT_DMABUF_FRAME_V1_CANCEL_REASON_PERNAMENT)
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if (reason == ZWLR_EXPORT_DMABUF_FRAME_V1_CANCEL_REASON_PERNAMENT) {
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av_log(ctx, AV_LOG_ERROR, "Permanent failure, exiting\n");
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ctx->err = 1;
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} else {
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register_cb(ctx);
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}
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}
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static const struct zwlr_export_dmabuf_frame_v1_listener frame_listener = {
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frame_start,
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frame_object,
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frame_plane,
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frame_ready,
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frame_cancel,
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.frame = frame_start,
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.object = frame_object,
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.plane = frame_plane,
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.ready = frame_ready,
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.cancel = frame_cancel,
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};
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static void register_cb(struct capture_context *ctx)
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{
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ctx->frame_callback =
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zwlr_export_dmabuf_manager_v1_capture_output(ctx->export_manager, 0,
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ctx->target_output);
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static void register_cb(struct capture_context *ctx) {
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ctx->frame_callback = zwlr_export_dmabuf_manager_v1_capture_output(
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ctx->export_manager, 0, ctx->target_output);
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zwlr_export_dmabuf_frame_v1_add_listener(ctx->frame_callback,
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&frame_listener, ctx);
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}
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static int init_lavu_hwcontext(struct capture_context *ctx) {
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/* DRM hwcontext */
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ctx->drm_device_ref = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_DRM);
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if (!ctx->drm_device_ref)
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@ -471,8 +471,7 @@ static int init_lavu_hwcontext(struct capture_context *ctx) {
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}
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static int set_hwframe_ctx(struct capture_context *ctx,
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AVBufferRef *hw_device_ctx)
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{
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AVBufferRef *hw_device_ctx) {
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AVHWFramesContext *frames_ctx = NULL;
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int err = 0;
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@ -489,10 +488,10 @@ static int set_hwframe_ctx(struct capture_context *ctx,
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}
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frames_ctx = (AVHWFramesContext *)(ctx->mapped_frames_ref->data);
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frames_ctx->format = cst->valid_hw_formats[0];
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frames_ctx->format = cst->valid_hw_formats[0];
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frames_ctx->sw_format = ctx->avctx->pix_fmt;
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frames_ctx->width = ctx->avctx->width;
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frames_ctx->height = ctx->avctx->height;
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frames_ctx->width = ctx->avctx->width;
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frames_ctx->height = ctx->avctx->height;
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av_hwframe_constraints_free(&cst);
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@ -545,25 +544,27 @@ static int init_encoding(struct capture_context *ctx) {
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if (!ctx->avctx)
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return 1;
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ctx->avctx->opaque = ctx;
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ctx->avctx->bit_rate = (int)ctx->out_bitrate*1000000.0f;
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ctx->avctx->pix_fmt = ctx->software_format;
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ctx->avctx->time_base = (AVRational){ 1, 1000 };
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ctx->avctx->opaque = ctx;
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ctx->avctx->bit_rate = (int)ctx->out_bitrate*1000000.0f;
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ctx->avctx->pix_fmt = ctx->software_format;
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ctx->avctx->time_base = (AVRational){ 1, 1000 };
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ctx->avctx->compression_level = 7;
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ctx->avctx->width = find_output(ctx, ctx->target_output, 0)->width;
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ctx->avctx->height = find_output(ctx, ctx->target_output, 0)->height;
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ctx->avctx->width = find_output(ctx, ctx->target_output, 0)->width;
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ctx->avctx->height = find_output(ctx, ctx->target_output, 0)->height;
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if (ctx->avf->oformat->flags & AVFMT_GLOBALHEADER)
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if (ctx->avf->oformat->flags & AVFMT_GLOBALHEADER) {
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ctx->avctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
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}
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st->id = 0;
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st->time_base = ctx->avctx->time_base;
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st->id = 0;
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st->time_base = ctx->avctx->time_base;
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st->avg_frame_rate = find_output(ctx, ctx->target_output, 0)->framerate;
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/* Init hw frames context */
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err = set_hwframe_ctx(ctx, ctx->mapped_device_ref);
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if (err)
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if (err) {
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return err;
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}
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err = avcodec_open2(ctx->avctx, out_codec, &ctx->encoder_opts);
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if (err) {
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@ -616,45 +617,21 @@ static int main_loop(struct capture_context *ctx) {
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}
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err = init_lavu_hwcontext(ctx);
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if (err)
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if (err) {
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return err;
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}
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err = init_encoding(ctx);
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if (err)
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if (err) {
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return err;
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}
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/* Start the frame callback */
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register_cb(ctx);
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while (!ctx->err && ctx->quit < 2) {
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while (wl_display_prepare_read(ctx->display) != 0) {
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wl_display_dispatch_pending(ctx->display);
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}
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wl_display_flush(ctx->display);
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struct pollfd fds[1] = {
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{ .fd = wl_display_get_fd(ctx->display), .events = POLLIN },
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};
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poll(fds, 1, -1);
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if (!(fds[0].revents & POLLIN)) {
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wl_display_cancel_read(ctx->display);
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}
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if (fds[0].revents & (POLLERR | POLLHUP | POLLNVAL)) {
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av_log(ctx, AV_LOG_ERROR, "Error occurred on the display fd!\n");
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break;
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}
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if (fds[0].revents & POLLIN) {
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if (wl_display_read_events(ctx->display) < 0) {
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av_log(ctx, AV_LOG_ERROR, "Failed to read Wayland events!\n");
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break;
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}
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wl_display_dispatch_pending(ctx->display);
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}
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while (wl_display_dispatch(ctx->display) != -1 && !ctx->err &&
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ctx->quit < 2) {
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// This space intentionally left blank
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}
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err = av_write_trailer(ctx->avf);
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@ -705,8 +682,9 @@ int main(int argc, char *argv[]) {
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});
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err = init(&ctx);
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if (err)
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if (err) {
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goto end;
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}
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struct wayland_output *o, *tmp_o;
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wl_list_for_each_reverse_safe(o, tmp_o, &ctx.output_list, link) {
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@ -742,8 +720,9 @@ int main(int argc, char *argv[]) {
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av_dict_set(&ctx.encoder_opts, "preset", "veryfast", 0);
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err = main_loop(&ctx);
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if (err)
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if (err) {
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goto end;
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}
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end:
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uninit(&ctx);
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@ -752,11 +731,13 @@ end:
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static void uninit(struct capture_context *ctx) {
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struct wayland_output *output, *tmp_o;
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wl_list_for_each_safe(output, tmp_o, &ctx->output_list, link)
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wl_list_for_each_safe(output, tmp_o, &ctx->output_list, link) {
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remove_output(output);
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}
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if (ctx->export_manager)
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if (ctx->export_manager) {
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zwlr_export_dmabuf_manager_v1_destroy(ctx->export_manager);
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}
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av_buffer_unref(&ctx->drm_frames_ref);
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av_buffer_unref(&ctx->drm_device_ref);
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