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synced 2024-12-30 19:32:13 +00:00
lavc: Use hardware config information in ff_get_format()
This removes the dependency that hardware pixel formats previously had on AVHWAccel instances, meaning only those which actually do something need exist after this patch. Also updates avcodec_default_get_format() to be able to choose hardware formats if either a matching device has been supplied or no additional external configuration is required, and avcodec_get_hw_frames_parameters() to use the hardware config rather than searching the old hwaccel list.
This commit is contained in:
Mark Thompson
parent
57623cba13
commit
39056b5240
@ -34,6 +34,7 @@
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#include "avcodec.h"
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#include "bytestream.h"
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#include "decode.h"
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#include "hwaccel.h"
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#include "internal.h"
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#include "thread.h"
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@ -644,29 +645,67 @@ int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
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return ret;
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}
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static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
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enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *avctx,
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const enum AVPixelFormat *fmt)
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{
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
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return desc->flags & AV_PIX_FMT_FLAG_HWACCEL;
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}
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const AVPixFmtDescriptor *desc;
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const AVCodecHWConfig *config;
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int i, n;
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enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
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{
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while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt))
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++fmt;
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return fmt[0];
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}
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// If a device was supplied when the codec was opened, assume that the
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// user wants to use it.
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if (avctx->hw_device_ctx && avctx->codec->hw_configs) {
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AVHWDeviceContext *device_ctx =
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(AVHWDeviceContext*)avctx->hw_device_ctx->data;
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for (i = 0;; i++) {
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config = &avctx->codec->hw_configs[i]->public;
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if (!config)
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break;
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if (!(config->methods &
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AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX))
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continue;
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if (device_ctx->type != config->device_type)
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continue;
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for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) {
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if (config->pix_fmt == fmt[n])
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return fmt[n];
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}
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}
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}
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// No device or other setup, so we have to choose from things which
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// don't any other external information.
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static AVHWAccel *find_hwaccel(enum AVCodecID codec_id,
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enum AVPixelFormat pix_fmt)
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{
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AVHWAccel *hwaccel = NULL;
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// If the last element of the list is a software format, choose it
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// (this should be best software format if any exist).
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for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++);
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desc = av_pix_fmt_desc_get(fmt[n - 1]);
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if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
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return fmt[n - 1];
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while ((hwaccel = av_hwaccel_next(hwaccel)))
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if (hwaccel->id == codec_id
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&& hwaccel->pix_fmt == pix_fmt)
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return hwaccel;
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return NULL;
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// Finally, traverse the list in order and choose the first entry
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// with no external dependencies (if there is no hardware configuration
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// information available then this just picks the first entry).
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for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) {
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for (i = 0;; i++) {
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config = avcodec_get_hw_config(avctx->codec, i);
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if (!config)
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break;
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if (config->pix_fmt == fmt[n])
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break;
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}
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if (!config) {
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// No specific config available, so the decoder must be able
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// to handle this format without any additional setup.
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return fmt[n];
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}
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if (config->methods & AV_CODEC_HW_CONFIG_METHOD_INTERNAL) {
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// Usable with only internal setup.
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return fmt[n];
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}
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}
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// Nothing is usable, give up.
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return AV_PIX_FMT_NONE;
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}
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int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx,
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@ -730,9 +769,19 @@ int avcodec_get_hw_frames_parameters(AVCodecContext *avctx,
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AVBufferRef **out_frames_ref)
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{
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AVBufferRef *frames_ref = NULL;
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AVHWAccel *hwa = find_hwaccel(avctx->codec_id, hw_pix_fmt);
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int ret;
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const AVCodecHWConfigInternal *hw_config;
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const AVHWAccel *hwa;
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int i, ret;
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for (i = 0;; i++) {
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hw_config = avctx->codec->hw_configs[i];
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if (!hw_config)
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return AVERROR(ENOENT);
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if (hw_config->public.pix_fmt == hw_pix_fmt)
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break;
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}
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hwa = hw_config->hwaccel;
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if (!hwa || !hwa->frame_params)
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return AVERROR(ENOENT);
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@ -749,52 +798,66 @@ int avcodec_get_hw_frames_parameters(AVCodecContext *avctx,
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return ret;
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}
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static int setup_hwaccel(AVCodecContext *avctx,
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const enum AVPixelFormat fmt,
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const char *name)
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static int hwaccel_init(AVCodecContext *avctx,
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const AVCodecHWConfigInternal *hw_config)
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{
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AVHWAccel *hwa = find_hwaccel(avctx->codec_id, fmt);
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int ret = 0;
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const AVHWAccel *hwaccel;
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int err;
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if (!hwa) {
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av_log(avctx, AV_LOG_ERROR,
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"Could not find an AVHWAccel for the pixel format: %s",
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name);
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return AVERROR(ENOENT);
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}
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if (hwa->priv_data_size) {
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avctx->internal->hwaccel_priv_data = av_mallocz(hwa->priv_data_size);
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hwaccel = hw_config->hwaccel;
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if (hwaccel->priv_data_size) {
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avctx->internal->hwaccel_priv_data =
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av_mallocz(hwaccel->priv_data_size);
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if (!avctx->internal->hwaccel_priv_data)
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return AVERROR(ENOMEM);
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}
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avctx->hwaccel = hwa;
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if (hwa->init) {
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ret = hwa->init(avctx);
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if (ret < 0) {
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av_freep(&avctx->internal->hwaccel_priv_data);
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avctx->hwaccel = NULL;
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return ret;
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}
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avctx->hwaccel = (AVHWAccel*)hwaccel;
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err = hwaccel->init(avctx);
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if (err < 0) {
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av_log(avctx, AV_LOG_ERROR, "Failed setup for format %s: "
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"hwaccel initialisation returned error.\n",
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av_get_pix_fmt_name(hw_config->public.pix_fmt));
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av_freep(&avctx->internal->hwaccel_priv_data);
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avctx->hwaccel = NULL;
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return err;
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}
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return 0;
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}
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static void hwaccel_uninit(AVCodecContext *avctx)
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{
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if (avctx->hwaccel && avctx->hwaccel->uninit)
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avctx->hwaccel->uninit(avctx);
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av_freep(&avctx->internal->hwaccel_priv_data);
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avctx->hwaccel = NULL;
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av_buffer_unref(&avctx->hw_frames_ctx);
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}
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int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
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{
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const AVPixFmtDescriptor *desc;
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enum AVPixelFormat *choices;
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enum AVPixelFormat ret;
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unsigned n = 0;
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while (fmt[n] != AV_PIX_FMT_NONE)
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++n;
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enum AVPixelFormat ret, user_choice;
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const AVCodecHWConfigInternal *hw_config;
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const AVCodecHWConfig *config;
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int i, n, err;
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// Find end of list.
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for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++);
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// Must contain at least one entry.
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av_assert0(n >= 1);
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avctx->sw_pix_fmt = fmt[n - 1];
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av_assert2(!is_hwaccel_pix_fmt(avctx->sw_pix_fmt));
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// If a software format is available, it must be the last entry.
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desc = av_pix_fmt_desc_get(fmt[n - 1]);
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if (desc->flags & AV_PIX_FMT_FLAG_HWACCEL) {
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// No software format is available.
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} else {
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avctx->sw_pix_fmt = fmt[n - 1];
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}
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choices = av_malloc_array(n + 1, sizeof(*choices));
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if (!choices)
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@ -803,44 +866,108 @@ int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
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memcpy(choices, fmt, (n + 1) * sizeof(*choices));
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for (;;) {
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if (avctx->hwaccel && avctx->hwaccel->uninit)
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avctx->hwaccel->uninit(avctx);
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av_freep(&avctx->internal->hwaccel_priv_data);
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avctx->hwaccel = NULL;
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// Remove the previous hwaccel, if there was one.
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hwaccel_uninit(avctx);
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av_buffer_unref(&avctx->hw_frames_ctx);
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ret = avctx->get_format(avctx, choices);
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desc = av_pix_fmt_desc_get(ret);
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if (!desc) {
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user_choice = avctx->get_format(avctx, choices);
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if (user_choice == AV_PIX_FMT_NONE) {
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// Explicitly chose nothing, give up.
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ret = AV_PIX_FMT_NONE;
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break;
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}
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if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
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desc = av_pix_fmt_desc_get(user_choice);
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if (!desc) {
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av_log(avctx, AV_LOG_ERROR, "Invalid format returned by "
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"get_format() callback.\n");
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ret = AV_PIX_FMT_NONE;
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break;
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}
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av_log(avctx, AV_LOG_DEBUG, "Format %s chosen by get_format().\n",
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desc->name);
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if (avctx->hw_frames_ctx) {
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AVHWFramesContext *hw_frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
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if (hw_frames_ctx->format != ret) {
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av_log(avctx, AV_LOG_ERROR, "Format returned from get_buffer() "
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"does not match the format of provided AVHWFramesContext\n");
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ret = AV_PIX_FMT_NONE;
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for (i = 0; i < n; i++) {
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if (choices[i] == user_choice)
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break;
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}
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}
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if (i == n) {
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av_log(avctx, AV_LOG_ERROR, "Invalid return from get_format(): "
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"%s not in possible list.\n", desc->name);
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break;
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}
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if (!setup_hwaccel(avctx, ret, desc->name))
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if (avctx->codec->hw_configs) {
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for (i = 0;; i++) {
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hw_config = avctx->codec->hw_configs[i];
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if (!hw_config)
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break;
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if (hw_config->public.pix_fmt == user_choice)
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break;
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}
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} else {
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hw_config = NULL;
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}
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if (!hw_config) {
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// No config available, so no extra setup required.
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ret = user_choice;
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break;
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}
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config = &hw_config->public;
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/* Remove failed hwaccel from choices */
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for (n = 0; choices[n] != ret; n++)
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av_assert0(choices[n] != AV_PIX_FMT_NONE);
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if (config->methods &
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AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX &&
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avctx->hw_frames_ctx) {
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const AVHWFramesContext *frames_ctx =
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(AVHWFramesContext*)avctx->hw_frames_ctx->data;
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if (frames_ctx->format != user_choice) {
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av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
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"does not match the format of the provided frames "
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"context.\n", desc->name);
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goto try_again;
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}
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} else if (config->methods &
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AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX &&
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avctx->hw_device_ctx) {
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const AVHWDeviceContext *device_ctx =
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(AVHWDeviceContext*)avctx->hw_device_ctx->data;
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if (device_ctx->type != config->device_type) {
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av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
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"does not match the type of the provided device "
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"context.\n", desc->name);
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goto try_again;
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}
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} else if (config->methods &
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AV_CODEC_HW_CONFIG_METHOD_INTERNAL) {
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// Internal-only setup, no additional configuration.
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} else if (config->methods &
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AV_CODEC_HW_CONFIG_METHOD_AD_HOC) {
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// Some ad-hoc configuration we can't see and can't check.
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} else {
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av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
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"missing configuration.\n", desc->name);
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goto try_again;
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}
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if (hw_config->hwaccel) {
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av_log(avctx, AV_LOG_DEBUG, "Format %s requires hwaccel "
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"initialisation.\n", desc->name);
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err = hwaccel_init(avctx, hw_config);
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if (err < 0)
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goto try_again;
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}
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ret = user_choice;
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break;
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do
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choices[n] = choices[n + 1];
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while (choices[n++] != AV_PIX_FMT_NONE);
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try_again:
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av_log(avctx, AV_LOG_DEBUG, "Format %s not usable, retrying "
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"get_format() without it.\n", desc->name);
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for (i = 0; i < n; i++) {
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if (choices[i] == user_choice)
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break;
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}
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for (; i + 1 < n; i++)
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choices[i] = choices[i + 1];
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--n;
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}
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av_freep(&choices);
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@ -272,6 +272,12 @@ int ff_side_data_update_matrix_encoding(AVFrame *frame,
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* Select the (possibly hardware accelerated) pixel format.
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* This is a wrapper around AVCodecContext.get_format() and should be used
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* instead of calling get_format() directly.
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*
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* The list of pixel formats must contain at least one valid entry, and is
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* terminated with AV_PIX_FMT_NONE. If it is possible to decode to software,
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* the last entry in the list must be the most accurate software format.
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* If it is not possible to decode to software, AVCodecContext.sw_pix_fmt
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* must be set before calling this function.
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*/
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int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt);
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